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-rw-r--r--Documentation/hwmon/adm1021111
-rw-r--r--Documentation/hwmon/adm102551
-rw-r--r--Documentation/hwmon/adm102693
-rw-r--r--Documentation/hwmon/adm103135
-rw-r--r--Documentation/hwmon/adm9240177
-rw-r--r--Documentation/hwmon/asb10072
-rw-r--r--Documentation/hwmon/ds1621108
-rw-r--r--Documentation/hwmon/fscher169
-rw-r--r--Documentation/hwmon/gl518sm74
-rw-r--r--Documentation/hwmon/it8796
-rw-r--r--Documentation/hwmon/lm6357
-rw-r--r--Documentation/hwmon/lm7565
-rw-r--r--Documentation/hwmon/lm7722
-rw-r--r--Documentation/hwmon/lm7882
-rw-r--r--Documentation/hwmon/lm8056
-rw-r--r--Documentation/hwmon/lm8376
-rw-r--r--Documentation/hwmon/lm85221
-rw-r--r--Documentation/hwmon/lm8773
-rw-r--r--Documentation/hwmon/lm90121
-rw-r--r--Documentation/hwmon/lm9237
-rw-r--r--Documentation/hwmon/max161929
-rw-r--r--Documentation/hwmon/pc87360189
-rw-r--r--Documentation/hwmon/sis5595106
-rw-r--r--Documentation/hwmon/smsc47b397158
-rw-r--r--Documentation/hwmon/smsc47m152
-rw-r--r--Documentation/hwmon/sysfs-interface274
-rw-r--r--Documentation/hwmon/userspace-tools39
-rw-r--r--Documentation/hwmon/via686a65
-rw-r--r--Documentation/hwmon/w83627hf66
-rw-r--r--Documentation/hwmon/w83781d402
-rw-r--r--Documentation/hwmon/w83l785ts39
31 files changed, 3215 insertions, 0 deletions
diff --git a/Documentation/hwmon/adm1021 b/Documentation/hwmon/adm1021
new file mode 100644
index 000000000000..03d02bfb3df1
--- /dev/null
+++ b/Documentation/hwmon/adm1021
@@ -0,0 +1,111 @@
1Kernel driver adm1021
2=====================
3
4Supported chips:
5 * Analog Devices ADM1021
6 Prefix: 'adm1021'
7 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
8 Datasheet: Publicly available at the Analog Devices website
9 * Analog Devices ADM1021A/ADM1023
10 Prefix: 'adm1023'
11 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
12 Datasheet: Publicly available at the Analog Devices website
13 * Genesys Logic GL523SM
14 Prefix: 'gl523sm'
15 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
16 Datasheet:
17 * Intel Xeon Processor
18 Prefix: - any other - may require 'force_adm1021' parameter
19 Addresses scanned: none
20 Datasheet: Publicly available at Intel website
21 * Maxim MAX1617
22 Prefix: 'max1617'
23 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
24 Datasheet: Publicly available at the Maxim website
25 * Maxim MAX1617A
26 Prefix: 'max1617a'
27 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
28 Datasheet: Publicly available at the Maxim website
29 * National Semiconductor LM84
30 Prefix: 'lm84'
31 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
32 Datasheet: Publicly available at the National Semiconductor website
33 * Philips NE1617
34 Prefix: 'max1617' (probably detected as a max1617)
35 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
36 Datasheet: Publicly available at the Philips website
37 * Philips NE1617A
38 Prefix: 'max1617' (probably detected as a max1617)
39 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
40 Datasheet: Publicly available at the Philips website
41 * TI THMC10
42 Prefix: 'thmc10'
43 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
44 Datasheet: Publicly available at the TI website
45 * Onsemi MC1066
46 Prefix: 'mc1066'
47 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
48 Datasheet: Publicly available at the Onsemi website
49
50
51Authors:
52 Frodo Looijaard <frodol@dds.nl>,
53 Philip Edelbrock <phil@netroedge.com>
54
55Module Parameters
56-----------------
57
58* read_only: int
59 Don't set any values, read only mode
60
61
62Description
63-----------
64
65The chips supported by this driver are very similar. The Maxim MAX1617 is
66the oldest; it has the problem that it is not very well detectable. The
67MAX1617A solves that. The ADM1021 is a straight clone of the MAX1617A.
68Ditto for the THMC10. From here on, we will refer to all these chips as
69ADM1021-clones.
70
71The ADM1021 and MAX1617A reports a die code, which is a sort of revision
72code. This can help us pinpoint problems; it is not very useful
73otherwise.
74
75ADM1021-clones implement two temperature sensors. One of them is internal,
76and measures the temperature of the chip itself; the other is external and
77is realised in the form of a transistor-like device. A special alarm
78indicates whether the remote sensor is connected.
79
80Each sensor has its own low and high limits. When they are crossed, the
81corresponding alarm is set and remains on as long as the temperature stays
82out of range. Temperatures are measured in degrees Celsius. Measurements
83are possible between -65 and +127 degrees, with a resolution of one degree.
84
85If an alarm triggers, it will remain triggered until the hardware register
86is read at least once. This means that the cause for the alarm may already
87have disappeared!
88
89This driver only updates its values each 1.5 seconds; reading it more often
90will do no harm, but will return 'old' values. It is possible to make
91ADM1021-clones do faster measurements, but there is really no good reason
92for that.
93
94Xeon support
95------------
96
97Some Xeon processors have real max1617, adm1021, or compatible chips
98within them, with two temperature sensors.
99
100Other Xeons have chips with only one sensor.
101
102If you have a Xeon, and the adm1021 module loads, and both temperatures
103appear valid, then things are good.
104
105If the adm1021 module doesn't load, you should try this:
106 modprobe adm1021 force_adm1021=BUS,ADDRESS
107 ADDRESS can only be 0x18, 0x1a, 0x29, 0x2b, 0x4c, or 0x4e.
108
109If you have dual Xeons you may have appear to have two separate
110adm1021-compatible chips, or two single-temperature sensors, at distinct
111addresses.
diff --git a/Documentation/hwmon/adm1025 b/Documentation/hwmon/adm1025
new file mode 100644
index 000000000000..39d2b781b5d6
--- /dev/null
+++ b/Documentation/hwmon/adm1025
@@ -0,0 +1,51 @@
1Kernel driver adm1025
2=====================
3
4Supported chips:
5 * Analog Devices ADM1025, ADM1025A
6 Prefix: 'adm1025'
7 Addresses scanned: I2C 0x2c - 0x2e
8 Datasheet: Publicly available at the Analog Devices website
9 * Philips NE1619
10 Prefix: 'ne1619'
11 Addresses scanned: I2C 0x2c - 0x2d
12 Datasheet: Publicly available at the Philips website
13
14The NE1619 presents some differences with the original ADM1025:
15 * Only two possible addresses (0x2c - 0x2d).
16 * No temperature offset register, but we don't use it anyway.
17 * No INT mode for pin 16. We don't play with it anyway.
18
19Authors:
20 Chen-Yuan Wu <gwu@esoft.com>,
21 Jean Delvare <khali@linux-fr.org>
22
23Description
24-----------
25
26(This is from Analog Devices.) The ADM1025 is a complete system hardware
27monitor for microprocessor-based systems, providing measurement and limit
28comparison of various system parameters. Five voltage measurement inputs
29are provided, for monitoring +2.5V, +3.3V, +5V and +12V power supplies and
30the processor core voltage. The ADM1025 can monitor a sixth power-supply
31voltage by measuring its own VCC. One input (two pins) is dedicated to a
32remote temperature-sensing diode and an on-chip temperature sensor allows
33ambient temperature to be monitored.
34
35One specificity of this chip is that the pin 11 can be hardwired in two
36different manners. It can act as the +12V power-supply voltage analog
37input, or as the a fifth digital entry for the VID reading (bit 4). It's
38kind of strange since both are useful, and the reason for designing the
39chip that way is obscure at least to me. The bit 5 of the configuration
40register can be used to define how the chip is hardwired. Please note that
41it is not a choice you have to make as the user. The choice was already
42made by your motherboard's maker. If the configuration bit isn't set
43properly, you'll have a wrong +12V reading or a wrong VID reading. The way
44the driver handles that is to preserve this bit through the initialization
45process, assuming that the BIOS set it up properly beforehand. If it turns
46out not to be true in some cases, we'll provide a module parameter to force
47modes.
48
49This driver also supports the ADM1025A, which differs from the ADM1025
50only in that it has "open-drain VID inputs while the ADM1025 has on-chip
51100k pull-ups on the VID inputs". It doesn't make any difference for us.
diff --git a/Documentation/hwmon/adm1026 b/Documentation/hwmon/adm1026
new file mode 100644
index 000000000000..473c689d7924
--- /dev/null
+++ b/Documentation/hwmon/adm1026
@@ -0,0 +1,93 @@
1Kernel driver adm1026
2=====================
3
4Supported chips:
5 * Analog Devices ADM1026
6 Prefix: 'adm1026'
7 Addresses scanned: I2C 0x2c, 0x2d, 0x2e
8 Datasheet: Publicly available at the Analog Devices website
9 http://www.analog.com/en/prod/0,,766_825_ADM1026,00.html
10
11Authors:
12 Philip Pokorny <ppokorny@penguincomputing.com> for Penguin Computing
13 Justin Thiessen <jthiessen@penguincomputing.com>
14
15Module Parameters
16-----------------
17
18* gpio_input: int array (min = 1, max = 17)
19 List of GPIO pins (0-16) to program as inputs
20* gpio_output: int array (min = 1, max = 17)
21 List of GPIO pins (0-16) to program as outputs
22* gpio_inverted: int array (min = 1, max = 17)
23 List of GPIO pins (0-16) to program as inverted
24* gpio_normal: int array (min = 1, max = 17)
25 List of GPIO pins (0-16) to program as normal/non-inverted
26* gpio_fan: int array (min = 1, max = 8)
27 List of GPIO pins (0-7) to program as fan tachs
28
29
30Description
31-----------
32
33This driver implements support for the Analog Devices ADM1026. Analog
34Devices calls it a "complete thermal system management controller."
35
36The ADM1026 implements three (3) temperature sensors, 17 voltage sensors,
3716 general purpose digital I/O lines, eight (8) fan speed sensors (8-bit),
38an analog output and a PWM output along with limit, alarm and mask bits for
39all of the above. There is even 8k bytes of EEPROM memory on chip.
40
41Temperatures are measured in degrees Celsius. There are two external
42sensor inputs and one internal sensor. Each sensor has a high and low
43limit. If the limit is exceeded, an interrupt (#SMBALERT) can be
44generated. The interrupts can be masked. In addition, there are over-temp
45limits for each sensor. If this limit is exceeded, the #THERM output will
46be asserted. The current temperature and limits have a resolution of 1
47degree.
48
49Fan rotation speeds are reported in RPM (rotations per minute) but measured
50in counts of a 22.5kHz internal clock. Each fan has a high limit which
51corresponds to a minimum fan speed. If the limit is exceeded, an interrupt
52can be generated. Each fan can be programmed to divide the reference clock
53by 1, 2, 4 or 8. Not all RPM values can accurately be represented, so some
54rounding is done. With a divider of 8, the slowest measurable speed of a
55two pulse per revolution fan is 661 RPM.
56
57There are 17 voltage sensors. An alarm is triggered if the voltage has
58crossed a programmable minimum or maximum limit. Note that minimum in this
59case always means 'closest to zero'; this is important for negative voltage
60measurements. Several inputs have integrated attenuators so they can measure
61higher voltages directly. 3.3V, 5V, 12V, -12V and battery voltage all have
62dedicated inputs. There are several inputs scaled to 0-3V full-scale range
63for SCSI terminator power. The remaining inputs are not scaled and have
64a 0-2.5V full-scale range. A 2.5V or 1.82V reference voltage is provided
65for negative voltage measurements.
66
67If an alarm triggers, it will remain triggered until the hardware register
68is read at least once. This means that the cause for the alarm may already
69have disappeared! Note that in the current implementation, all hardware
70registers are read whenever any data is read (unless it is less than 2.0
71seconds since the last update). This means that you can easily miss
72once-only alarms.
73
74The ADM1026 measures continuously. Analog inputs are measured about 4
75times a second. Fan speed measurement time depends on fan speed and
76divisor. It can take as long as 1.5 seconds to measure all fan speeds.
77
78The ADM1026 has the ability to automatically control fan speed based on the
79temperature sensor inputs. Both the PWM output and the DAC output can be
80used to control fan speed. Usually only one of these two outputs will be
81used. Write the minimum PWM or DAC value to the appropriate control
82register. Then set the low temperature limit in the tmin values for each
83temperature sensor. The range of control is fixed at 20 °C, and the
84largest difference between current and tmin of the temperature sensors sets
85the control output. See the datasheet for several example circuits for
86controlling fan speed with the PWM and DAC outputs. The fan speed sensors
87do not have PWM compensation, so it is probably best to control the fan
88voltage from the power lead rather than on the ground lead.
89
90The datasheet shows an example application with VID signals attached to
91GPIO lines. Unfortunately, the chip may not be connected to the VID lines
92in this way. The driver assumes that the chips *is* connected this way to
93get a VID voltage.
diff --git a/Documentation/hwmon/adm1031 b/Documentation/hwmon/adm1031
new file mode 100644
index 000000000000..130a38382b98
--- /dev/null
+++ b/Documentation/hwmon/adm1031
@@ -0,0 +1,35 @@
1Kernel driver adm1031
2=====================
3
4Supported chips:
5 * Analog Devices ADM1030
6 Prefix: 'adm1030'
7 Addresses scanned: I2C 0x2c to 0x2e
8 Datasheet: Publicly available at the Analog Devices website
9 http://products.analog.com/products/info.asp?product=ADM1030
10
11 * Analog Devices ADM1031
12 Prefix: 'adm1031'
13 Addresses scanned: I2C 0x2c to 0x2e
14 Datasheet: Publicly available at the Analog Devices website
15 http://products.analog.com/products/info.asp?product=ADM1031
16
17Authors:
18 Alexandre d'Alton <alex@alexdalton.org>
19 Jean Delvare <khali@linux-fr.org>
20
21Description
22-----------
23
24The ADM1030 and ADM1031 are digital temperature sensors and fan controllers.
25They sense their own temperature as well as the temperature of up to one
26(ADM1030) or two (ADM1031) external diodes.
27
28All temperature values are given in degrees Celsius. Resolution is 0.5
29degree for the local temperature, 0.125 degree for the remote temperatures.
30
31Each temperature channel has its own high and low limits, plus a critical
32limit.
33
34The ADM1030 monitors a single fan speed, while the ADM1031 monitors up to
35two. Each fan channel has its own low speed limit.
diff --git a/Documentation/hwmon/adm9240 b/Documentation/hwmon/adm9240
new file mode 100644
index 000000000000..35f618f32896
--- /dev/null
+++ b/Documentation/hwmon/adm9240
@@ -0,0 +1,177 @@
1Kernel driver adm9240
2=====================
3
4Supported chips:
5 * Analog Devices ADM9240
6 Prefix: 'adm9240'
7 Addresses scanned: I2C 0x2c - 0x2f
8 Datasheet: Publicly available at the Analog Devices website
9 http://www.analog.com/UploadedFiles/Data_Sheets/79857778ADM9240_0.pdf
10
11 * Dallas Semiconductor DS1780
12 Prefix: 'ds1780'
13 Addresses scanned: I2C 0x2c - 0x2f
14 Datasheet: Publicly available at the Dallas Semiconductor (Maxim) website
15 http://pdfserv.maxim-ic.com/en/ds/DS1780.pdf
16
17 * National Semiconductor LM81
18 Prefix: 'lm81'
19 Addresses scanned: I2C 0x2c - 0x2f
20 Datasheet: Publicly available at the National Semiconductor website
21 http://www.national.com/ds.cgi/LM/LM81.pdf
22
23Authors:
24 Frodo Looijaard <frodol@dds.nl>,
25 Philip Edelbrock <phil@netroedge.com>,
26 Michiel Rook <michiel@grendelproject.nl>,
27 Grant Coady <gcoady@gmail.com> with guidance
28 from Jean Delvare <khali@linux-fr.org>
29
30Interface
31---------
32The I2C addresses listed above assume BIOS has not changed the
33chip MSB 5-bit address. Each chip reports a unique manufacturer
34identification code as well as the chip revision/stepping level.
35
36Description
37-----------
38[From ADM9240] The ADM9240 is a complete system hardware monitor for
39microprocessor-based systems, providing measurement and limit comparison
40of up to four power supplies and two processor core voltages, plus
41temperature, two fan speeds and chassis intrusion. Measured values can
42be read out via an I2C-compatible serial System Management Bus, and values
43for limit comparisons can be programmed in over the same serial bus. The
44high speed successive approximation ADC allows frequent sampling of all
45analog channels to ensure a fast interrupt response to any out-of-limit
46measurement.
47
48The ADM9240, DS1780 and LM81 are register compatible, the following
49details are common to the three chips. Chip differences are described
50after this section.
51
52
53Measurements
54------------
55The measurement cycle
56
57The adm9240 driver will take a measurement reading no faster than once
58each two seconds. User-space may read sysfs interface faster than the
59measurement update rate and will receive cached data from the most
60recent measurement.
61
62ADM9240 has a very fast 320us temperature and voltage measurement cycle
63with independent fan speed measurement cycles counting alternating rising
64edges of the fan tacho inputs.
65
66DS1780 measurement cycle is about once per second including fan speed.
67
68LM81 measurement cycle is about once per 400ms including fan speed.
69The LM81 12-bit extended temperature measurement mode is not supported.
70
71Temperature
72-----------
73On chip temperature is reported as degrees Celsius as 9-bit signed data
74with resolution of 0.5 degrees Celsius. High and low temperature limits
75are 8-bit signed data with resolution of one degree Celsius.
76
77Temperature alarm is asserted once the temperature exceeds the high limit,
78and is cleared when the temperature falls below the temp1_max_hyst value.
79
80Fan Speed
81---------
82Two fan tacho inputs are provided, the ADM9240 gates an internal 22.5kHz
83clock via a divider to an 8-bit counter. Fan speed (rpm) is calculated by:
84
85rpm = (22500 * 60) / (count * divider)
86
87Automatic fan clock divider
88
89 * User sets 0 to fan_min limit
90 - low speed alarm is disabled
91 - fan clock divider not changed
92 - auto fan clock adjuster enabled for valid fan speed reading
93
94 * User sets fan_min limit too low
95 - low speed alarm is enabled
96 - fan clock divider set to max
97 - fan_min set to register value 254 which corresponds
98 to 664 rpm on adm9240
99 - low speed alarm will be asserted if fan speed is
100 less than minimum measurable speed
101 - auto fan clock adjuster disabled
102
103 * User sets reasonable fan speed
104 - low speed alarm is enabled
105 - fan clock divider set to suit fan_min
106 - auto fan clock adjuster enabled: adjusts fan_min
107
108 * User sets unreasonably high low fan speed limit
109 - resolution of the low speed limit may be reduced
110 - alarm will be asserted
111 - auto fan clock adjuster enabled: adjusts fan_min
112
113 * fan speed may be displayed as zero until the auto fan clock divider
114 adjuster brings fan speed clock divider back into chip measurement
115 range, this will occur within a few measurement cycles.
116
117Analog Output
118-------------
119An analog output provides a 0 to 1.25 volt signal intended for an external
120fan speed amplifier circuit. The analog output is set to maximum value on
121power up or reset. This doesn't do much on the test Intel SE440BX-2.
122
123Voltage Monitor
124
125Voltage (IN) measurement is internally scaled:
126
127 nr label nominal maximum resolution
128 mV mV mV
129 0 +2.5V 2500 3320 13.0
130 1 Vccp1 2700 3600 14.1
131 2 +3.3V 3300 4380 17.2
132 3 +5V 5000 6640 26.0
133 4 +12V 12000 15940 62.5
134 5 Vccp2 2700 3600 14.1
135
136The reading is an unsigned 8-bit value, nominal voltage measurement is
137represented by a reading of 192, being 3/4 of the measurement range.
138
139An alarm is asserted for any voltage going below or above the set limits.
140
141The driver reports and accepts voltage limits scaled to the above table.
142
143VID Monitor
144-----------
145The chip has five inputs to read the 5-bit VID and reports the mV value
146based on detected CPU type.
147
148Chassis Intrusion
149-----------------
150An alarm is asserted when the CI pin goes active high. The ADM9240
151Datasheet has an example of an external temperature sensor driving
152this pin. On an Intel SE440BX-2 the Chassis Intrusion header is
153connected to a normally open switch.
154
155The ADM9240 provides an internal open drain on this line, and may output
156a 20 ms active low pulse to reset an external Chassis Intrusion latch.
157
158Clear the CI latch by writing value 1 to the sysfs chassis_clear file.
159
160Alarm flags reported as 16-bit word
161
162 bit label comment
163 --- ------------- --------------------------
164 0 +2.5 V_Error high or low limit exceeded
165 1 VCCP_Error high or low limit exceeded
166 2 +3.3 V_Error high or low limit exceeded
167 3 +5 V_Error high or low limit exceeded
168 4 Temp_Error temperature error
169 6 FAN1_Error fan low limit exceeded
170 7 FAN2_Error fan low limit exceeded
171 8 +12 V_Error high or low limit exceeded
172 9 VCCP2_Error high or low limit exceeded
173 12 Chassis_Error CI pin went high
174
175Remaining bits are reserved and thus undefined. It is important to note
176that alarm bits may be cleared on read, user-space may latch alarms and
177provide the end-user with a method to clear alarm memory.
diff --git a/Documentation/hwmon/asb100 b/Documentation/hwmon/asb100
new file mode 100644
index 000000000000..ab7365e139be
--- /dev/null
+++ b/Documentation/hwmon/asb100
@@ -0,0 +1,72 @@
1Kernel driver asb100
2====================
3
4Supported Chips:
5 * Asus ASB100 and ASB100-A "Bach"
6 Prefix: 'asb100'
7 Addresses scanned: I2C 0x2d
8 Datasheet: none released
9
10Author: Mark M. Hoffman <mhoffman@lightlink.com>
11
12Description
13-----------
14
15This driver implements support for the Asus ASB100 and ASB100-A "Bach".
16These are custom ASICs available only on Asus mainboards. Asus refuses to
17supply a datasheet for these chips. Thanks go to many people who helped
18investigate their hardware, including:
19
20Vitaly V. Bursov
21Alexander van Kaam (author of MBM for Windows)
22Bertrik Sikken
23
24The ASB100 implements seven voltage sensors, three fan rotation speed
25sensors, four temperature sensors, VID lines and alarms. In addition to
26these, the ASB100-A also implements a single PWM controller for fans 2 and
273 (i.e. one setting controls both.) If you have a plain ASB100, the PWM
28controller will simply not work (or maybe it will for you... it doesn't for
29me).
30
31Temperatures are measured and reported in degrees Celsius.
32
33Fan speeds are reported in RPM (rotations per minute). An alarm is
34triggered if the rotation speed has dropped below a programmable limit.
35
36Voltage sensors (also known as IN sensors) report values in volts.
37
38The VID lines encode the core voltage value: the voltage level your
39processor should work with. This is hardcoded by the mainboard and/or
40processor itself. It is a value in volts.
41
42Alarms: (TODO question marks indicate may or may not work)
43
440x0001 => in0 (?)
450x0002 => in1 (?)
460x0004 => in2
470x0008 => in3
480x0010 => temp1 (1)
490x0020 => temp2
500x0040 => fan1
510x0080 => fan2
520x0100 => in4
530x0200 => in5 (?) (2)
540x0400 => in6 (?) (2)
550x0800 => fan3
560x1000 => chassis switch
570x2000 => temp3
58
59Alarm Notes:
60
61(1) This alarm will only trigger if the hysteresis value is 127C.
62I.e. it behaves the same as w83781d.
63
64(2) The min and max registers for these values appear to
65be read-only or otherwise stuck at 0x00.
66
67TODO:
68* Experiment with fan divisors > 8.
69* Experiment with temp. sensor types.
70* Are there really 13 voltage inputs? Probably not...
71* Cleanups, no doubt...
72
diff --git a/Documentation/hwmon/ds1621 b/Documentation/hwmon/ds1621
new file mode 100644
index 000000000000..1fee6f1e6bc5
--- /dev/null
+++ b/Documentation/hwmon/ds1621
@@ -0,0 +1,108 @@
1Kernel driver ds1621
2====================
3
4Supported chips:
5 * Dallas Semiconductor DS1621
6 Prefix: 'ds1621'
7 Addresses scanned: I2C 0x48 - 0x4f
8 Datasheet: Publicly available at the Dallas Semiconductor website
9 http://www.dalsemi.com/
10 * Dallas Semiconductor DS1625
11 Prefix: 'ds1621'
12 Addresses scanned: I2C 0x48 - 0x4f
13 Datasheet: Publicly available at the Dallas Semiconductor website
14 http://www.dalsemi.com/
15
16Authors:
17 Christian W. Zuckschwerdt <zany@triq.net>
18 valuable contributions by Jan M. Sendler <sendler@sendler.de>
19 ported to 2.6 by Aurelien Jarno <aurelien@aurel32.net>
20 with the help of Jean Delvare <khali@linux-fr.org>
21
22Module Parameters
23------------------
24
25* polarity int
26 Output's polarity: 0 = active high, 1 = active low
27
28Description
29-----------
30
31The DS1621 is a (one instance) digital thermometer and thermostat. It has
32both high and low temperature limits which can be user defined (i.e.
33programmed into non-volatile on-chip registers). Temperature range is -55
34degree Celsius to +125 in 0.5 increments. You may convert this into a
35Fahrenheit range of -67 to +257 degrees with 0.9 steps. If polarity
36parameter is not provided, original value is used.
37
38As for the thermostat, behavior can also be programmed using the polarity
39toggle. On the one hand ("heater"), the thermostat output of the chip,
40Tout, will trigger when the low limit temperature is met or underrun and
41stays high until the high limit is met or exceeded. On the other hand
42("cooler"), vice versa. That way "heater" equals "active low", whereas
43"conditioner" equals "active high". Please note that the DS1621 data sheet
44is somewhat misleading in this point since setting the polarity bit does
45not simply invert Tout.
46
47A second thing is that, during extensive testing, Tout showed a tolerance
48of up to +/- 0.5 degrees even when compared against precise temperature
49readings. Be sure to have a high vs. low temperature limit gap of al least
501.0 degree Celsius to avoid Tout "bouncing", though!
51
52As for alarms, you can read the alarm status of the DS1621 via the 'alarms'
53/sys file interface. The result consists mainly of bit 6 and 5 of the
54configuration register of the chip; bit 6 (0x40 or 64) is the high alarm
55bit and bit 5 (0x20 or 32) the low one. These bits are set when the high or
56low limits are met or exceeded and are reset by the module as soon as the
57respective temperature ranges are left.
58
59The alarm registers are in no way suitable to find out about the actual
60status of Tout. They will only tell you about its history, whether or not
61any of the limits have ever been met or exceeded since last power-up or
62reset. Be aware: When testing, it showed that the status of Tout can change
63with neither of the alarms set.
64
65Temperature conversion of the DS1621 takes up to 1000ms; internal access to
66non-volatile registers may last for 10ms or below.
67
68High Accuracy Temperature Reading
69---------------------------------
70
71As said before, the temperature issued via the 9-bit i2c-bus data is
72somewhat arbitrary. Internally, the temperature conversion is of a
73different kind that is explained (not so...) well in the DS1621 data sheet.
74To cut the long story short: Inside the DS1621 there are two oscillators,
75both of them biassed by a temperature coefficient.
76
77Higher resolution of the temperature reading can be achieved using the
78internal projection, which means taking account of REG_COUNT and REG_SLOPE
79(the driver manages them):
80
81Taken from Dallas Semiconductors App Note 068: 'Increasing Temperature
82Resolution on the DS1620' and App Note 105: 'High Resolution Temperature
83Measurement with Dallas Direct-to-Digital Temperature Sensors'
84
85- Read the 9-bit temperature and strip the LSB (Truncate the .5 degs)
86- The resulting value is TEMP_READ.
87- Then, read REG_COUNT.
88- And then, REG_SLOPE.
89
90 TEMP = TEMP_READ - 0.25 + ((REG_SLOPE - REG_COUNT) / REG_SLOPE)
91
92Note that this is what the DONE bit in the DS1621 configuration register is
93good for: Internally, one temperature conversion takes up to 1000ms. Before
94that conversion is complete you will not be able to read valid things out
95of REG_COUNT and REG_SLOPE. The DONE bit, as you may have guessed by now,
96tells you whether the conversion is complete ("done", in plain English) and
97thus, whether the values you read are good or not.
98
99The DS1621 has two modes of operation: "Continuous" conversion, which can
100be understood as the default stand-alone mode where the chip gets the
101temperature and controls external devices via its Tout pin or tells other
102i2c's about it if they care. The other mode is called "1SHOT", that means
103that it only figures out about the temperature when it is explicitly told
104to do so; this can be seen as power saving mode.
105
106Now if you want to read REG_COUNT and REG_SLOPE, you have to either stop
107the continuous conversions until the contents of these registers are valid,
108or, in 1SHOT mode, you have to have one conversion made.
diff --git a/Documentation/hwmon/fscher b/Documentation/hwmon/fscher
new file mode 100644
index 000000000000..64031659aff3
--- /dev/null
+++ b/Documentation/hwmon/fscher
@@ -0,0 +1,169 @@
1Kernel driver fscher
2====================
3
4Supported chips:
5 * Fujitsu-Siemens Hermes chip
6 Prefix: 'fscher'
7 Addresses scanned: I2C 0x73
8
9Authors:
10 Reinhard Nissl <rnissl@gmx.de> based on work
11 from Hermann Jung <hej@odn.de>,
12 Frodo Looijaard <frodol@dds.nl>,
13 Philip Edelbrock <phil@netroedge.com>
14
15Description
16-----------
17
18This driver implements support for the Fujitsu-Siemens Hermes chip. It is
19described in the 'Register Set Specification BMC Hermes based Systemboard'
20from Fujitsu-Siemens.
21
22The Hermes chip implements a hardware-based system management, e.g. for
23controlling fan speed and core voltage. There is also a watchdog counter on
24the chip which can trigger an alarm and even shut the system down.
25
26The chip provides three temperature values (CPU, motherboard and
27auxiliary), three voltage values (+12V, +5V and battery) and three fans
28(power supply, CPU and auxiliary).
29
30Temperatures are measured in degrees Celsius. The resolution is 1 degree.
31
32Fan rotation speeds are reported in RPM (rotations per minute). The value
33can be divided by a programmable divider (1, 2 or 4) which is stored on
34the chip.
35
36Voltage sensors (also known as "in" sensors) report their values in volts.
37
38All values are reported as final values from the driver. There is no need
39for further calculations.
40
41
42Detailed description
43--------------------
44
45Below you'll find a single line description of all the bit values. With
46this information, you're able to decode e. g. alarms, wdog, etc. To make
47use of the watchdog, you'll need to set the watchdog time and enable the
48watchdog. After that it is necessary to restart the watchdog time within
49the specified period of time, or a system reset will occur.
50
51* revision
52 READING & 0xff = 0x??: HERMES revision identification
53
54* alarms
55 READING & 0x80 = 0x80: CPU throttling active
56 READING & 0x80 = 0x00: CPU running at full speed
57
58 READING & 0x10 = 0x10: software event (see control:1)
59 READING & 0x10 = 0x00: no software event
60
61 READING & 0x08 = 0x08: watchdog event (see wdog:2)
62 READING & 0x08 = 0x00: no watchdog event
63
64 READING & 0x02 = 0x02: thermal event (see temp*:1)
65 READING & 0x02 = 0x00: no thermal event
66
67 READING & 0x01 = 0x01: fan event (see fan*:1)
68 READING & 0x01 = 0x00: no fan event
69
70 READING & 0x13 ! 0x00: ALERT LED is flashing
71
72* control
73 READING & 0x01 = 0x01: software event
74 READING & 0x01 = 0x00: no software event
75
76 WRITING & 0x01 = 0x01: set software event
77 WRITING & 0x01 = 0x00: clear software event
78
79* watchdog_control
80 READING & 0x80 = 0x80: power off on watchdog event while thermal event
81 READING & 0x80 = 0x00: watchdog power off disabled (just system reset enabled)
82
83 READING & 0x40 = 0x40: watchdog timebase 60 seconds (see also wdog:1)
84 READING & 0x40 = 0x00: watchdog timebase 2 seconds
85
86 READING & 0x10 = 0x10: watchdog enabled
87 READING & 0x10 = 0x00: watchdog disabled
88
89 WRITING & 0x80 = 0x80: enable "power off on watchdog event while thermal event"
90 WRITING & 0x80 = 0x00: disable "power off on watchdog event while thermal event"
91
92 WRITING & 0x40 = 0x40: set watchdog timebase to 60 seconds
93 WRITING & 0x40 = 0x00: set watchdog timebase to 2 seconds
94
95 WRITING & 0x20 = 0x20: disable watchdog
96
97 WRITING & 0x10 = 0x10: enable watchdog / restart watchdog time
98
99* watchdog_state
100 READING & 0x02 = 0x02: watchdog system reset occurred
101 READING & 0x02 = 0x00: no watchdog system reset occurred
102
103 WRITING & 0x02 = 0x02: clear watchdog event
104
105* watchdog_preset
106 READING & 0xff = 0x??: configured watch dog time in units (see wdog:3 0x40)
107
108 WRITING & 0xff = 0x??: configure watch dog time in units
109
110* in* (0: +5V, 1: +12V, 2: onboard 3V battery)
111 READING: actual voltage value
112
113* temp*_status (1: CPU sensor, 2: onboard sensor, 3: auxiliary sensor)
114 READING & 0x02 = 0x02: thermal event (overtemperature)
115 READING & 0x02 = 0x00: no thermal event
116
117 READING & 0x01 = 0x01: sensor is working
118 READING & 0x01 = 0x00: sensor is faulty
119
120 WRITING & 0x02 = 0x02: clear thermal event
121
122* temp*_input (1: CPU sensor, 2: onboard sensor, 3: auxiliary sensor)
123 READING: actual temperature value
124
125* fan*_status (1: power supply fan, 2: CPU fan, 3: auxiliary fan)
126 READING & 0x04 = 0x04: fan event (fan fault)
127 READING & 0x04 = 0x00: no fan event
128
129 WRITING & 0x04 = 0x04: clear fan event
130
131* fan*_div (1: power supply fan, 2: CPU fan, 3: auxiliary fan)
132 Divisors 2,4 and 8 are supported, both for reading and writing
133
134* fan*_pwm (1: power supply fan, 2: CPU fan, 3: auxiliary fan)
135 READING & 0xff = 0x00: fan may be switched off
136 READING & 0xff = 0x01: fan must run at least at minimum speed (supply: 6V)
137 READING & 0xff = 0xff: fan must run at maximum speed (supply: 12V)
138 READING & 0xff = 0x??: fan must run at least at given speed (supply: 6V..12V)
139
140 WRITING & 0xff = 0x00: fan may be switched off
141 WRITING & 0xff = 0x01: fan must run at least at minimum speed (supply: 6V)
142 WRITING & 0xff = 0xff: fan must run at maximum speed (supply: 12V)
143 WRITING & 0xff = 0x??: fan must run at least at given speed (supply: 6V..12V)
144
145* fan*_input (1: power supply fan, 2: CPU fan, 3: auxiliary fan)
146 READING: actual RPM value
147
148
149Limitations
150-----------
151
152* Measuring fan speed
153It seems that the chip counts "ripples" (typical fans produce 2 ripples per
154rotation while VERAX fans produce 18) in a 9-bit register. This register is
155read out every second, then the ripple prescaler (2, 4 or 8) is applied and
156the result is stored in the 8 bit output register. Due to the limitation of
157the counting register to 9 bits, it is impossible to measure a VERAX fan
158properly (even with a prescaler of 8). At its maximum speed of 3500 RPM the
159fan produces 1080 ripples per second which causes the counting register to
160overflow twice, leading to only 186 RPM.
161
162* Measuring input voltages
163in2 ("battery") reports the voltage of the onboard lithium battery and not
164+3.3V from the power supply.
165
166* Undocumented features
167Fujitsu-Siemens Computers has not documented all features of the chip so
168far. Their software, System Guard, shows that there are a still some
169features which cannot be controlled by this implementation.
diff --git a/Documentation/hwmon/gl518sm b/Documentation/hwmon/gl518sm
new file mode 100644
index 000000000000..ce0881883bca
--- /dev/null
+++ b/Documentation/hwmon/gl518sm
@@ -0,0 +1,74 @@
1Kernel driver gl518sm
2=====================
3
4Supported chips:
5 * Genesys Logic GL518SM release 0x00
6 Prefix: 'gl518sm'
7 Addresses scanned: I2C 0x2c and 0x2d
8 Datasheet: http://www.genesyslogic.com/pdf
9 * Genesys Logic GL518SM release 0x80
10 Prefix: 'gl518sm'
11 Addresses scanned: I2C 0x2c and 0x2d
12 Datasheet: http://www.genesyslogic.com/pdf
13
14Authors:
15 Frodo Looijaard <frodol@dds.nl>,
16 Kyösti Mälkki <kmalkki@cc.hut.fi>
17 Hong-Gunn Chew <hglinux@gunnet.org>
18 Jean Delvare <khali@linux-fr.org>
19
20Description
21-----------
22
23IMPORTANT:
24
25For the revision 0x00 chip, the in0, in1, and in2 values (+5V, +3V,
26and +12V) CANNOT be read. This is a limitation of the chip, not the driver.
27
28This driver supports the Genesys Logic GL518SM chip. There are at least
29two revision of this chip, which we call revision 0x00 and 0x80. Revision
300x80 chips support the reading of all voltages and revision 0x00 only
31for VIN3.
32
33The GL518SM implements one temperature sensor, two fan rotation speed
34sensors, and four voltage sensors. It can report alarms through the
35computer speakers.
36
37Temperatures are measured in degrees Celsius. An alarm goes off while the
38temperature is above the over temperature limit, and has not yet dropped
39below the hysteresis limit. The alarm always reflects the current
40situation. Measurements are guaranteed between -10 degrees and +110
41degrees, with a accuracy of +/-3 degrees.
42
43Rotation speeds are reported in RPM (rotations per minute). An alarm is
44triggered if the rotation speed has dropped below a programmable limit. In
45case when you have selected to turn fan1 off, no fan1 alarm is triggered.
46
47Fan readings can be divided by a programmable divider (1, 2, 4 or 8) to
48give the readings more range or accuracy. Not all RPM values can
49accurately be represented, so some rounding is done. With a divider
50of 2, the lowest representable value is around 1900 RPM.
51
52Voltage sensors (also known as VIN sensors) report their values in volts.
53An alarm is triggered if the voltage has crossed a programmable minimum or
54maximum limit. Note that minimum in this case always means 'closest to
55zero'; this is important for negative voltage measurements. The VDD input
56measures voltages between 0.000 and 5.865 volt, with a resolution of 0.023
57volt. The other inputs measure voltages between 0.000 and 4.845 volt, with
58a resolution of 0.019 volt. Note that revision 0x00 chips do not support
59reading the current voltage of any input except for VIN3; limit setting and
60alarms work fine, though.
61
62When an alarm is triggered, you can be warned by a beeping signal through your
63computer speaker. It is possible to enable all beeping globally, or only the
64beeping for some alarms.
65
66If an alarm triggers, it will remain triggered until the hardware register
67is read at least once (except for temperature alarms). This means that the
68cause for the alarm may already have disappeared! Note that in the current
69implementation, all hardware registers are read whenever any data is read
70(unless it is less than 1.5 seconds since the last update). This means that
71you can easily miss once-only alarms.
72
73The GL518SM only updates its values each 1.5 seconds; reading it more often
74will do no harm, but will return 'old' values.
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
new file mode 100644
index 000000000000..0d0195040d88
--- /dev/null
+++ b/Documentation/hwmon/it87
@@ -0,0 +1,96 @@
1Kernel driver it87
2==================
3
4Supported chips:
5 * IT8705F
6 Prefix: 'it87'
7 Addresses scanned: from Super I/O config space, or default ISA 0x290 (8 I/O ports)
8 Datasheet: Publicly available at the ITE website
9 http://www.ite.com.tw/
10 * IT8712F
11 Prefix: 'it8712'
12 Addresses scanned: I2C 0x28 - 0x2f
13 from Super I/O config space, or default ISA 0x290 (8 I/O ports)
14 Datasheet: Publicly available at the ITE website
15 http://www.ite.com.tw/
16 * SiS950 [clone of IT8705F]
17 Prefix: 'sis950'
18 Addresses scanned: from Super I/O config space, or default ISA 0x290 (8 I/O ports)
19 Datasheet: No longer be available
20
21Author: Christophe Gauthron <chrisg@0-in.com>
22
23
24Module Parameters
25-----------------
26
27* update_vbat: int
28
29 0 if vbat should report power on value, 1 if vbat should be updated after
30 each read. Default is 0. On some boards the battery voltage is provided
31 by either the battery or the onboard power supply. Only the first reading
32 at power on will be the actual battery voltage (which the chip does
33 automatically). On other boards the battery voltage is always fed to
34 the chip so can be read at any time. Excessive reading may decrease
35 battery life but no information is given in the datasheet.
36
37* fix_pwm_polarity int
38
39 Force PWM polarity to active high (DANGEROUS). Some chips are
40 misconfigured by BIOS - PWM values would be inverted. This option tries
41 to fix this. Please contact your BIOS manufacturer and ask him for fix.
42
43Description
44-----------
45
46This driver implements support for the IT8705F, IT8712F and SiS950 chips.
47
48This driver also supports IT8712F, which adds SMBus access, and a VID
49input, used to report the Vcore voltage of the Pentium processor.
50The IT8712F additionally features VID inputs.
51
52These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
53joysticks and other miscellaneous stuff. For hardware monitoring, they
54include an 'environment controller' with 3 temperature sensors, 3 fan
55rotation speed sensors, 8 voltage sensors, and associated alarms.
56
57Temperatures are measured in degrees Celsius. An alarm is triggered once
58when the Overtemperature Shutdown limit is crossed.
59
60Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
61triggered if the rotation speed has dropped below a programmable limit. Fan
62readings can be divided by a programmable divider (1, 2, 4 or 8) to give the
63readings more range or accuracy. Not all RPM values can accurately be
64represented, so some rounding is done. With a divider of 2, the lowest
65representable value is around 2600 RPM.
66
67Voltage sensors (also known as IN sensors) report their values in volts. An
68alarm is triggered if the voltage has crossed a programmable minimum or
69maximum limit. Note that minimum in this case always means 'closest to
70zero'; this is important for negative voltage measurements. All voltage
71inputs can measure voltages between 0 and 4.08 volts, with a resolution of
720.016 volt. The battery voltage in8 does not have limit registers.
73
74The VID lines (IT8712F only) encode the core voltage value: the voltage
75level your processor should work with. This is hardcoded by the mainboard
76and/or processor itself. It is a value in volts.
77
78If an alarm triggers, it will remain triggered until the hardware register
79is read at least once. This means that the cause for the alarm may already
80have disappeared! Note that in the current implementation, all hardware
81registers are read whenever any data is read (unless it is less than 1.5
82seconds since the last update). This means that you can easily miss
83once-only alarms.
84
85The IT87xx only updates its values each 1.5 seconds; reading it more often
86will do no harm, but will return 'old' values.
87
88To change sensor N to a thermistor, 'echo 2 > tempN_type' where N is 1, 2,
89or 3. To change sensor N to a thermal diode, 'echo 3 > tempN_type'.
90Give 0 for unused sensor. Any other value is invalid. To configure this at
91startup, consult lm_sensors's /etc/sensors.conf. (2 = thermistor;
923 = thermal diode)
93
94The fan speed control features are limited to manual PWM mode. Automatic
95"Smart Guardian" mode control handling is not implemented. However
96if you want to go for "manual mode" just write 1 to pwmN_enable.
diff --git a/Documentation/hwmon/lm63 b/Documentation/hwmon/lm63
new file mode 100644
index 000000000000..31660bf97979
--- /dev/null
+++ b/Documentation/hwmon/lm63
@@ -0,0 +1,57 @@
1Kernel driver lm63
2==================
3
4Supported chips:
5 * National Semiconductor LM63
6 Prefix: 'lm63'
7 Addresses scanned: I2C 0x4c
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/pf/LM/LM63.html
10
11Author: Jean Delvare <khali@linux-fr.org>
12
13Thanks go to Tyan and especially Alex Buckingham for setting up a remote
14access to their S4882 test platform for this driver.
15 http://www.tyan.com/
16
17Description
18-----------
19
20The LM63 is a digital temperature sensor with integrated fan monitoring
21and control.
22
23The LM63 is basically an LM86 with fan speed monitoring and control
24capabilities added. It misses some of the LM86 features though:
25 - No low limit for local temperature.
26 - No critical limit for local temperature.
27 - Critical limit for remote temperature can be changed only once. We
28 will consider that the critical limit is read-only.
29
30The datasheet isn't very clear about what the tachometer reading is.
31
32An explanation from National Semiconductor: The two lower bits of the read
33value have to be masked out. The value is still 16 bit in width.
34
35All temperature values are given in degrees Celsius. Resolution is 1.0
36degree for the local temperature, 0.125 degree for the remote temperature.
37
38The fan speed is measured using a tachometer. Contrary to most chips which
39store the value in an 8-bit register and have a selectable clock divider
40to make sure that the result will fit in the register, the LM63 uses 16-bit
41value for measuring the speed of the fan. It can measure fan speeds down to
4283 RPM, at least in theory.
43
44Note that the pin used for fan monitoring is shared with an alert out
45function. Depending on how the board designer wanted to use the chip, fan
46speed monitoring will or will not be possible. The proper chip configuration
47is left to the BIOS, and the driver will blindly trust it.
48
49A PWM output can be used to control the speed of the fan. The LM63 has two
50PWM modes: manual and automatic. Automatic mode is not fully implemented yet
51(you cannot define your custom PWM/temperature curve), and mode change isn't
52supported either.
53
54The lm63 driver will not update its values more frequently than every
55second; reading them more often will do no harm, but will return 'old'
56values.
57
diff --git a/Documentation/hwmon/lm75 b/Documentation/hwmon/lm75
new file mode 100644
index 000000000000..8e6356fe05d7
--- /dev/null
+++ b/Documentation/hwmon/lm75
@@ -0,0 +1,65 @@
1Kernel driver lm75
2==================
3
4Supported chips:
5 * National Semiconductor LM75
6 Prefix: 'lm75'
7 Addresses scanned: I2C 0x48 - 0x4f
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/
10 * Dallas Semiconductor DS75
11 Prefix: 'lm75'
12 Addresses scanned: I2C 0x48 - 0x4f
13 Datasheet: Publicly available at the Dallas Semiconductor website
14 http://www.maxim-ic.com/
15 * Dallas Semiconductor DS1775
16 Prefix: 'lm75'
17 Addresses scanned: I2C 0x48 - 0x4f
18 Datasheet: Publicly available at the Dallas Semiconductor website
19 http://www.maxim-ic.com/
20 * Maxim MAX6625, MAX6626
21 Prefix: 'lm75'
22 Addresses scanned: I2C 0x48 - 0x4b
23 Datasheet: Publicly available at the Maxim website
24 http://www.maxim-ic.com/
25 * Microchip (TelCom) TCN75
26 Prefix: 'lm75'
27 Addresses scanned: I2C 0x48 - 0x4f
28 Datasheet: Publicly available at the Microchip website
29 http://www.microchip.com/
30
31Author: Frodo Looijaard <frodol@dds.nl>
32
33Description
34-----------
35
36The LM75 implements one temperature sensor. Limits can be set through the
37Overtemperature Shutdown register and Hysteresis register. Each value can be
38set and read to half-degree accuracy.
39An alarm is issued (usually to a connected LM78) when the temperature
40gets higher then the Overtemperature Shutdown value; it stays on until
41the temperature falls below the Hysteresis value.
42All temperatures are in degrees Celsius, and are guaranteed within a
43range of -55 to +125 degrees.
44
45The LM75 only updates its values each 1.5 seconds; reading it more often
46will do no harm, but will return 'old' values.
47
48The LM75 is usually used in combination with LM78-like chips, to measure
49the temperature of the processor(s).
50
51The DS75, DS1775, MAX6625, and MAX6626 are supported as well.
52They are not distinguished from an LM75. While most of these chips
53have three additional bits of accuracy (12 vs. 9 for the LM75),
54the additional bits are not supported. Not only that, but these chips will
55not be detected if not in 9-bit precision mode (use the force parameter if
56needed).
57
58The TCN75 is supported as well, and is not distinguished from an LM75.
59
60The LM75 is essentially an industry standard; there may be other
61LM75 clones not listed here, with or without various enhancements,
62that are supported.
63
64The LM77 is not supported, contrary to what we pretended for a long time.
65Both chips are simply not compatible, value encoding differs.
diff --git a/Documentation/hwmon/lm77 b/Documentation/hwmon/lm77
new file mode 100644
index 000000000000..57c3a46d6370
--- /dev/null
+++ b/Documentation/hwmon/lm77
@@ -0,0 +1,22 @@
1Kernel driver lm77
2==================
3
4Supported chips:
5 * National Semiconductor LM77
6 Prefix: 'lm77'
7 Addresses scanned: I2C 0x48 - 0x4b
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/
10
11Author: Andras BALI <drewie@freemail.hu>
12
13Description
14-----------
15
16The LM77 implements one temperature sensor. The temperature
17sensor incorporates a band-gap type temperature sensor,
1810-bit ADC, and a digital comparator with user-programmable upper
19and lower limit values.
20
21Limits can be set through the Overtemperature Shutdown register and
22Hysteresis register.
diff --git a/Documentation/hwmon/lm78 b/Documentation/hwmon/lm78
new file mode 100644
index 000000000000..357086ed7f64
--- /dev/null
+++ b/Documentation/hwmon/lm78
@@ -0,0 +1,82 @@
1Kernel driver lm78
2==================
3
4Supported chips:
5 * National Semiconductor LM78
6 Prefix: 'lm78'
7 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/
10 * National Semiconductor LM78-J
11 Prefix: 'lm78-j'
12 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
13 Datasheet: Publicly available at the National Semiconductor website
14 http://www.national.com/
15 * National Semiconductor LM79
16 Prefix: 'lm79'
17 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
18 Datasheet: Publicly available at the National Semiconductor website
19 http://www.national.com/
20
21Author: Frodo Looijaard <frodol@dds.nl>
22
23Description
24-----------
25
26This driver implements support for the National Semiconductor LM78, LM78-J
27and LM79. They are described as 'Microprocessor System Hardware Monitors'.
28
29There is almost no difference between the three supported chips. Functionally,
30the LM78 and LM78-J are exactly identical. The LM79 has one more VID line,
31which is used to report the lower voltages newer Pentium processors use.
32From here on, LM7* means either of these three types.
33
34The LM7* implements one temperature sensor, three fan rotation speed sensors,
35seven voltage sensors, VID lines, alarms, and some miscellaneous stuff.
36
37Temperatures are measured in degrees Celsius. An alarm is triggered once
38when the Overtemperature Shutdown limit is crossed; it is triggered again
39as soon as it drops below the Hysteresis value. A more useful behavior
40can be found by setting the Hysteresis value to +127 degrees Celsius; in
41this case, alarms are issued during all the time when the actual temperature
42is above the Overtemperature Shutdown value. Measurements are guaranteed
43between -55 and +125 degrees, with a resolution of 1 degree.
44
45Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
46triggered if the rotation speed has dropped below a programmable limit. Fan
47readings can be divided by a programmable divider (1, 2, 4 or 8) to give
48the readings more range or accuracy. Not all RPM values can accurately be
49represented, so some rounding is done. With a divider of 2, the lowest
50representable value is around 2600 RPM.
51
52Voltage sensors (also known as IN sensors) report their values in volts.
53An alarm is triggered if the voltage has crossed a programmable minimum
54or maximum limit. Note that minimum in this case always means 'closest to
55zero'; this is important for negative voltage measurements. All voltage
56inputs can measure voltages between 0 and 4.08 volts, with a resolution
57of 0.016 volt.
58
59The VID lines encode the core voltage value: the voltage level your processor
60should work with. This is hardcoded by the mainboard and/or processor itself.
61It is a value in volts. When it is unconnected, you will often find the
62value 3.50 V here.
63
64In addition to the alarms described above, there are a couple of additional
65ones. There is a BTI alarm, which gets triggered when an external chip has
66crossed its limits. Usually, this is connected to all LM75 chips; if at
67least one crosses its limits, this bit gets set. The CHAS alarm triggers
68if your computer case is open. The FIFO alarms should never trigger; it
69indicates an internal error. The SMI_IN alarm indicates some other chip
70has triggered an SMI interrupt. As we do not use SMI interrupts at all,
71this condition usually indicates there is a problem with some other
72device.
73
74If an alarm triggers, it will remain triggered until the hardware register
75is read at least once. This means that the cause for the alarm may
76already have disappeared! Note that in the current implementation, all
77hardware registers are read whenever any data is read (unless it is less
78than 1.5 seconds since the last update). This means that you can easily
79miss once-only alarms.
80
81The LM7* only updates its values each 1.5 seconds; reading it more often
82will do no harm, but will return 'old' values.
diff --git a/Documentation/hwmon/lm80 b/Documentation/hwmon/lm80
new file mode 100644
index 000000000000..cb5b407ba3e6
--- /dev/null
+++ b/Documentation/hwmon/lm80
@@ -0,0 +1,56 @@
1Kernel driver lm80
2==================
3
4Supported chips:
5 * National Semiconductor LM80
6 Prefix: 'lm80'
7 Addresses scanned: I2C 0x28 - 0x2f
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/
10
11Authors:
12 Frodo Looijaard <frodol@dds.nl>,
13 Philip Edelbrock <phil@netroedge.com>
14
15Description
16-----------
17
18This driver implements support for the National Semiconductor LM80.
19It is described as a 'Serial Interface ACPI-Compatible Microprocessor
20System Hardware Monitor'.
21
22The LM80 implements one temperature sensor, two fan rotation speed sensors,
23seven voltage sensors, alarms, and some miscellaneous stuff.
24
25Temperatures are measured in degrees Celsius. There are two sets of limits
26which operate independently. When the HOT Temperature Limit is crossed,
27this will cause an alarm that will be reasserted until the temperature
28drops below the HOT Hysteresis. The Overtemperature Shutdown (OS) limits
29should work in the same way (but this must be checked; the datasheet
30is unclear about this). Measurements are guaranteed between -55 and
31+125 degrees. The current temperature measurement has a resolution of
320.0625 degrees; the limits have a resolution of 1 degree.
33
34Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
35triggered if the rotation speed has dropped below a programmable limit. Fan
36readings can be divided by a programmable divider (1, 2, 4 or 8) to give
37the readings more range or accuracy. Not all RPM values can accurately be
38represented, so some rounding is done. With a divider of 2, the lowest
39representable value is around 2600 RPM.
40
41Voltage sensors (also known as IN sensors) report their values in volts.
42An alarm is triggered if the voltage has crossed a programmable minimum
43or maximum limit. Note that minimum in this case always means 'closest to
44zero'; this is important for negative voltage measurements. All voltage
45inputs can measure voltages between 0 and 2.55 volts, with a resolution
46of 0.01 volt.
47
48If an alarm triggers, it will remain triggered until the hardware register
49is read at least once. This means that the cause for the alarm may
50already have disappeared! Note that in the current implementation, all
51hardware registers are read whenever any data is read (unless it is less
52than 2.0 seconds since the last update). This means that you can easily
53miss once-only alarms.
54
55The LM80 only updates its values each 1.5 seconds; reading it more often
56will do no harm, but will return 'old' values.
diff --git a/Documentation/hwmon/lm83 b/Documentation/hwmon/lm83
new file mode 100644
index 000000000000..061d9ed8ff43
--- /dev/null
+++ b/Documentation/hwmon/lm83
@@ -0,0 +1,76 @@
1Kernel driver lm83
2==================
3
4Supported chips:
5 * National Semiconductor LM83
6 Prefix: 'lm83'
7 Addresses scanned: I2C 0x18 - 0x1a, 0x29 - 0x2b, 0x4c - 0x4e
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/pf/LM/LM83.html
10
11
12Author: Jean Delvare <khali@linux-fr.org>
13
14Description
15-----------
16
17The LM83 is a digital temperature sensor. It senses its own temperature as
18well as the temperature of up to three external diodes. It is compatible
19with many other devices such as the LM84 and all other ADM1021 clones.
20The main difference between the LM83 and the LM84 in that the later can
21only sense the temperature of one external diode.
22
23Using the adm1021 driver for a LM83 should work, but only two temperatures
24will be reported instead of four.
25
26The LM83 is only found on a handful of motherboards. Both a confirmed
27list and an unconfirmed list follow. If you can confirm or infirm the
28fact that any of these motherboards do actually have an LM83, please
29contact us. Note that the LM90 can easily be misdetected as a LM83.
30
31Confirmed motherboards:
32 SBS P014
33
34Unconfirmed motherboards:
35 Gigabyte GA-8IK1100
36 Iwill MPX2
37 Soltek SL-75DRV5
38
39The driver has been successfully tested by Magnus Forsström, who I'd
40like to thank here. More testers will be of course welcome.
41
42The fact that the LM83 is only scarcely used can be easily explained.
43Most motherboards come with more than just temperature sensors for
44health monitoring. They also have voltage and fan rotation speed
45sensors. This means that temperature-only chips are usually used as
46secondary chips coupled with another chip such as an IT8705F or similar
47chip, which provides more features. Since systems usually need three
48temperature sensors (motherboard, processor, power supply) and primary
49chips provide some temperature sensors, the secondary chip, if needed,
50won't have to handle more than two temperatures. Thus, ADM1021 clones
51are sufficient, and there is no need for a four temperatures sensor
52chip such as the LM83. The only case where using an LM83 would make
53sense is on SMP systems, such as the above-mentioned Iwill MPX2,
54because you want an additional temperature sensor for each additional
55CPU.
56
57On the SBS P014, this is different, since the LM83 is the only hardware
58monitoring chipset. One temperature sensor is used for the motherboard
59(actually measuring the LM83's own temperature), one is used for the
60CPU. The two other sensors must be used to measure the temperature of
61two other points of the motherboard. We suspect these points to be the
62north and south bridges, but this couldn't be confirmed.
63
64All temperature values are given in degrees Celsius. Local temperature
65is given within a range of 0 to +85 degrees. Remote temperatures are
66given within a range of 0 to +125 degrees. Resolution is 1.0 degree,
67accuracy is guaranteed to 3.0 degrees (see the datasheet for more
68details).
69
70Each sensor has its own high limit, but the critical limit is common to
71all four sensors. There is no hysteresis mechanism as found on most
72recent temperature sensors.
73
74The lm83 driver will not update its values more frequently than every
75other second; reading them more often will do no harm, but will return
76'old' values.
diff --git a/Documentation/hwmon/lm85 b/Documentation/hwmon/lm85
new file mode 100644
index 000000000000..9549237530cf
--- /dev/null
+++ b/Documentation/hwmon/lm85
@@ -0,0 +1,221 @@
1Kernel driver lm85
2==================
3
4Supported chips:
5 * National Semiconductor LM85 (B and C versions)
6 Prefix: 'lm85'
7 Addresses scanned: I2C 0x2c, 0x2d, 0x2e
8 Datasheet: http://www.national.com/pf/LM/LM85.html
9 * Analog Devices ADM1027
10 Prefix: 'adm1027'
11 Addresses scanned: I2C 0x2c, 0x2d, 0x2e
12 Datasheet: http://www.analog.com/en/prod/0,,766_825_ADM1027,00.html
13 * Analog Devices ADT7463
14 Prefix: 'adt7463'
15 Addresses scanned: I2C 0x2c, 0x2d, 0x2e
16 Datasheet: http://www.analog.com/en/prod/0,,766_825_ADT7463,00.html
17 * SMSC EMC6D100, SMSC EMC6D101
18 Prefix: 'emc6d100'
19 Addresses scanned: I2C 0x2c, 0x2d, 0x2e
20 Datasheet: http://www.smsc.com/main/tools/discontinued/6d100.pdf
21 * SMSC EMC6D102
22 Prefix: 'emc6d102'
23 Addresses scanned: I2C 0x2c, 0x2d, 0x2e
24 Datasheet: http://www.smsc.com/main/catalog/emc6d102.html
25
26Authors:
27 Philip Pokorny <ppokorny@penguincomputing.com>,
28 Frodo Looijaard <frodol@dds.nl>,
29 Richard Barrington <rich_b_nz@clear.net.nz>,
30 Margit Schubert-While <margitsw@t-online.de>,
31 Justin Thiessen <jthiessen@penguincomputing.com>
32
33Description
34-----------
35
36This driver implements support for the National Semiconductor LM85 and
37compatible chips including the Analog Devices ADM1027, ADT7463 and
38SMSC EMC6D10x chips family.
39
40The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
41specification. Using an analog to digital converter it measures three (3)
42temperatures and five (5) voltages. It has four (4) 16-bit counters for
43measuring fan speed. Five (5) digital inputs are provided for sampling the
44VID signals from the processor to the VRM. Lastly, there are three (3) PWM
45outputs that can be used to control fan speed.
46
47The voltage inputs have internal scaling resistors so that the following
48voltage can be measured without external resistors:
49
50 2.5V, 3.3V, 5V, 12V, and CPU core voltage (2.25V)
51
52The temperatures measured are one internal diode, and two remote diodes.
53Remote 1 is generally the CPU temperature. These inputs are designed to
54measure a thermal diode like the one in a Pentium 4 processor in a socket
55423 or socket 478 package. They can also measure temperature using a
56transistor like the 2N3904.
57
58A sophisticated control system for the PWM outputs is designed into the
59LM85 that allows fan speed to be adjusted automatically based on any of the
60three temperature sensors. Each PWM output is individually adjustable and
61programmable. Once configured, the LM85 will adjust the PWM outputs in
62response to the measured temperatures without further host intervention.
63This feature can also be disabled for manual control of the PWM's.
64
65Each of the measured inputs (voltage, temperature, fan speed) has
66corresponding high/low limit values. The LM85 will signal an ALARM if any
67measured value exceeds either limit.
68
69The LM85 samples all inputs continuously. The lm85 driver will not read
70the registers more often than once a second. Further, configuration data is
71only read once each 5 minutes. There is twice as much config data as
72measurements, so this would seem to be a worthwhile optimization.
73
74Special Features
75----------------
76
77The LM85 has four fan speed monitoring modes. The ADM1027 has only two.
78Both have special circuitry to compensate for PWM interactions with the
79TACH signal from the fans. The ADM1027 can be configured to measure the
80speed of a two wire fan, but the input conditioning circuitry is different
81for 3-wire and 2-wire mode. For this reason, the 2-wire fan modes are not
82exposed to user control. The BIOS should initialize them to the correct
83mode. If you've designed your own ADM1027, you'll have to modify the
84init_client function and add an insmod parameter to set this up.
85
86To smooth the response of fans to changes in temperature, the LM85 has an
87optional filter for smoothing temperatures. The ADM1027 has the same
88config option but uses it to rate limit the changes to fan speed instead.
89
90The ADM1027 and ADT7463 have a 10-bit ADC and can therefore measure
91temperatures with 0.25 degC resolution. They also provide an offset to the
92temperature readings that is automatically applied during measurement.
93This offset can be used to zero out any errors due to traces and placement.
94The documentation says that the offset is in 0.25 degC steps, but in
95initial testing of the ADM1027 it was 1.00 degC steps. Analog Devices has
96confirmed this "bug". The ADT7463 is reported to work as described in the
97documentation. The current lm85 driver does not show the offset register.
98
99The ADT7463 has a THERM asserted counter. This counter has a 22.76ms
100resolution and a range of 5.8 seconds. The driver implements a 32-bit
101accumulator of the counter value to extend the range to over a year. The
102counter will stay at it's max value until read.
103
104See the vendor datasheets for more information. There is application note
105from National (AN-1260) with some additional information about the LM85.
106The Analog Devices datasheet is very detailed and describes a procedure for
107determining an optimal configuration for the automatic PWM control.
108
109The SMSC EMC6D100 & EMC6D101 monitor external voltages, temperatures, and
110fan speeds. They use this monitoring capability to alert the system to out
111of limit conditions and can automatically control the speeds of multiple
112fans in a PC or embedded system. The EMC6D101, available in a 24-pin SSOP
113package, and the EMC6D100, available in a 28-pin SSOP package, are designed
114to be register compatible. The EMC6D100 offers all the features of the
115EMC6D101 plus additional voltage monitoring and system control features.
116Unfortunately it is not possible to distinguish between the package
117versions on register level so these additional voltage inputs may read
118zero. The EMC6D102 features addtional ADC bits thus extending precision
119of voltage and temperature channels.
120
121
122Hardware Configurations
123-----------------------
124
125The LM85 can be jumpered for 3 different SMBus addresses. There are
126no other hardware configuration options for the LM85.
127
128The lm85 driver detects both LM85B and LM85C revisions of the chip. See the
129datasheet for a complete description of the differences. Other than
130identifying the chip, the driver behaves no differently with regard to
131these two chips. The LM85B is recommended for new designs.
132
133The ADM1027 and ADT7463 chips have an optional SMBALERT output that can be
134used to signal the chipset in case a limit is exceeded or the temperature
135sensors fail. Individual sensor interrupts can be masked so they won't
136trigger SMBALERT. The SMBALERT output if configured replaces one of the other
137functions (PWM2 or IN0). This functionality is not implemented in current
138driver.
139
140The ADT7463 also has an optional THERM output/input which can be connected
141to the processor PROC_HOT output. If available, the autofan control
142dynamic Tmin feature can be enabled to keep the system temperature within
143spec (just?!) with the least possible fan noise.
144
145Configuration Notes
146-------------------
147
148Besides standard interfaces driver adds following:
149
150* Temperatures and Zones
151
152Each temperature sensor is associated with a Zone. There are three
153sensors and therefore three zones (# 1, 2 and 3). Each zone has the following
154temperature configuration points:
155
156* temp#_auto_temp_off - temperature below which fans should be off or spinning very low.
157* temp#_auto_temp_min - temperature over which fans start to spin.
158* temp#_auto_temp_max - temperature when fans spin at full speed.
159* temp#_auto_temp_crit - temperature when all fans will run full speed.
160
161* PWM Control
162
163There are three PWM outputs. The LM85 datasheet suggests that the
164pwm3 output control both fan3 and fan4. Each PWM can be individually
165configured and assigned to a zone for it's control value. Each PWM can be
166configured individually according to the following options.
167
168* pwm#_auto_pwm_min - this specifies the PWM value for temp#_auto_temp_off
169 temperature. (PWM value from 0 to 255)
170
171* pwm#_auto_pwm_freq - select base frequency of PWM output. You can select
172 in range of 10.0 to 94.0 Hz in .1 Hz units.
173 (Values 100 to 940).
174
175The pwm#_auto_pwm_freq can be set to one of the following 8 values. Setting the
176frequency to a value not on this list, will result in the next higher frequency
177being selected. The actual device frequency may vary slightly from this
178specification as designed by the manufacturer. Consult the datasheet for more
179details. (PWM Frequency values: 100, 150, 230, 300, 380, 470, 620, 940)
180
181* pwm#_auto_pwm_minctl - this flags selects for temp#_auto_temp_off temperature
182 the bahaviour of fans. Write 1 to let fans spinning at
183 pwm#_auto_pwm_min or write 0 to let them off.
184
185NOTE: It has been reported that there is a bug in the LM85 that causes the flag
186to be associated with the zones not the PWMs. This contradicts all the
187published documentation. Setting pwm#_min_ctl in this case actually affects all
188PWMs controlled by zone '#'.
189
190* PWM Controlling Zone selection
191
192* pwm#_auto_channels - controls zone that is associated with PWM
193
194Configuration choices:
195
196 Value Meaning
197 ------ ------------------------------------------------
198 1 Controlled by Zone 1
199 2 Controlled by Zone 2
200 3 Controlled by Zone 3
201 23 Controlled by higher temp of Zone 2 or 3
202 123 Controlled by highest temp of Zone 1, 2 or 3
203 0 PWM always 0% (off)
204 -1 PWM always 100% (full on)
205 -2 Manual control (write to 'pwm#' to set)
206
207The National LM85's have two vendor specific configuration
208features. Tach. mode and Spinup Control. For more details on these,
209see the LM85 datasheet or Application Note AN-1260.
210
211The Analog Devices ADM1027 has several vendor specific enhancements.
212The number of pulses-per-rev of the fans can be set, Tach monitoring
213can be optimized for PWM operation, and an offset can be applied to
214the temperatures to compensate for systemic errors in the
215measurements.
216
217In addition to the ADM1027 features, the ADT7463 also has Tmin control
218and THERM asserted counts. Automatic Tmin control acts to adjust the
219Tmin value to maintain the measured temperature sensor at a specified
220temperature. There isn't much documentation on this feature in the
221ADT7463 data sheet. This is not supported by current driver.
diff --git a/Documentation/hwmon/lm87 b/Documentation/hwmon/lm87
new file mode 100644
index 000000000000..c952c57f0e11
--- /dev/null
+++ b/Documentation/hwmon/lm87
@@ -0,0 +1,73 @@
1Kernel driver lm87
2==================
3
4Supported chips:
5 * National Semiconductor LM87
6 Prefix: 'lm87'
7 Addresses scanned: I2C 0x2c - 0x2f
8 Datasheet: http://www.national.com/pf/LM/LM87.html
9
10Authors:
11 Frodo Looijaard <frodol@dds.nl>,
12 Philip Edelbrock <phil@netroedge.com>,
13 Mark Studebaker <mdsxyz123@yahoo.com>,
14 Stephen Rousset <stephen.rousset@rocketlogix.com>,
15 Dan Eaton <dan.eaton@rocketlogix.com>,
16 Jean Delvare <khali@linux-fr.org>,
17 Original 2.6 port Jeff Oliver
18
19Description
20-----------
21
22This driver implements support for the National Semiconductor LM87.
23
24The LM87 implements up to three temperature sensors, up to two fan
25rotation speed sensors, up to seven voltage sensors, alarms, and some
26miscellaneous stuff.
27
28Temperatures are measured in degrees Celsius. Each input has a high
29and low alarm settings. A high limit produces an alarm when the value
30goes above it, and an alarm is also produced when the value goes below
31the low limit.
32
33Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
34triggered if the rotation speed has dropped below a programmable limit. Fan
35readings can be divided by a programmable divider (1, 2, 4 or 8) to give
36the readings more range or accuracy. Not all RPM values can accurately be
37represented, so some rounding is done. With a divider of 2, the lowest
38representable value is around 2600 RPM.
39
40Voltage sensors (also known as IN sensors) report their values in
41volts. An alarm is triggered if the voltage has crossed a programmable
42minimum or maximum limit. Note that minimum in this case always means
43'closest to zero'; this is important for negative voltage measurements.
44
45If an alarm triggers, it will remain triggered until the hardware register
46is read at least once. This means that the cause for the alarm may
47already have disappeared! Note that in the current implementation, all
48hardware registers are read whenever any data is read (unless it is less
49than 1.0 seconds since the last update). This means that you can easily
50miss once-only alarms.
51
52The lm87 driver only updates its values each 1.0 seconds; reading it more
53often will do no harm, but will return 'old' values.
54
55
56Hardware Configurations
57-----------------------
58
59The LM87 has four pins which can serve one of two possible functions,
60depending on the hardware configuration.
61
62Some functions share pins, so not all functions are available at the same
63time. Which are depends on the hardware setup. This driver assumes that
64the BIOS configured the chip correctly. In that respect, it differs from
65the original driver (from lm_sensors for Linux 2.4), which would force the
66LM87 to an arbitrary, compile-time chosen mode, regardless of the actual
67chipset wiring.
68
69For reference, here is the list of exclusive functions:
70 - in0+in5 (default) or temp3
71 - fan1 (default) or in6
72 - fan2 (default) or in7
73 - VID lines (default) or IRQ lines (not handled by this driver)
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90
new file mode 100644
index 000000000000..2c4cf39471f4
--- /dev/null
+++ b/Documentation/hwmon/lm90
@@ -0,0 +1,121 @@
1Kernel driver lm90
2==================
3
4Supported chips:
5 * National Semiconductor LM90
6 Prefix: 'lm90'
7 Addresses scanned: I2C 0x4c
8 Datasheet: Publicly available at the National Semiconductor website
9 http://www.national.com/pf/LM/LM90.html
10 * National Semiconductor LM89
11 Prefix: 'lm99'
12 Addresses scanned: I2C 0x4c and 0x4d
13 Datasheet: Publicly available at the National Semiconductor website
14 http://www.national.com/pf/LM/LM89.html
15 * National Semiconductor LM99
16 Prefix: 'lm99'
17 Addresses scanned: I2C 0x4c and 0x4d
18 Datasheet: Publicly available at the National Semiconductor website
19 http://www.national.com/pf/LM/LM99.html
20 * National Semiconductor LM86
21 Prefix: 'lm86'
22 Addresses scanned: I2C 0x4c
23 Datasheet: Publicly available at the National Semiconductor website
24 http://www.national.com/pf/LM/LM86.html
25 * Analog Devices ADM1032
26 Prefix: 'adm1032'
27 Addresses scanned: I2C 0x4c
28 Datasheet: Publicly available at the Analog Devices website
29 http://products.analog.com/products/info.asp?product=ADM1032
30 * Analog Devices ADT7461
31 Prefix: 'adt7461'
32 Addresses scanned: I2C 0x4c
33 Datasheet: Publicly available at the Analog Devices website
34 http://products.analog.com/products/info.asp?product=ADT7461
35 Note: Only if in ADM1032 compatibility mode
36 * Maxim MAX6657
37 Prefix: 'max6657'
38 Addresses scanned: I2C 0x4c
39 Datasheet: Publicly available at the Maxim website
40 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
41 * Maxim MAX6658
42 Prefix: 'max6657'
43 Addresses scanned: I2C 0x4c
44 Datasheet: Publicly available at the Maxim website
45 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
46 * Maxim MAX6659
47 Prefix: 'max6657'
48 Addresses scanned: I2C 0x4c, 0x4d (unsupported 0x4e)
49 Datasheet: Publicly available at the Maxim website
50 http://www.maxim-ic.com/quick_view2.cfm/qv_pk/2578
51
52
53Author: Jean Delvare <khali@linux-fr.org>
54
55
56Description
57-----------
58
59The LM90 is a digital temperature sensor. It senses its own temperature as
60well as the temperature of up to one external diode. It is compatible
61with many other devices such as the LM86, the LM89, the LM99, the ADM1032,
62the MAX6657, MAX6658 and the MAX6659 all of which are supported by this driver.
63Note that there is no easy way to differentiate between the last three
64variants. The extra address and features of the MAX6659 are not supported by
65this driver. Additionally, the ADT7461 is supported if found in ADM1032
66compatibility mode.
67
68The specificity of this family of chipsets over the ADM1021/LM84
69family is that it features critical limits with hysteresis, and an
70increased resolution of the remote temperature measurement.
71
72The different chipsets of the family are not strictly identical, although
73very similar. This driver doesn't handle any specific feature for now,
74but could if there ever was a need for it. For reference, here comes a
75non-exhaustive list of specific features:
76
77LM90:
78 * Filter and alert configuration register at 0xBF.
79 * ALERT is triggered by temperatures over critical limits.
80
81LM86 and LM89:
82 * Same as LM90
83 * Better external channel accuracy
84
85LM99:
86 * Same as LM89
87 * External temperature shifted by 16 degrees down
88
89ADM1032:
90 * Consecutive alert register at 0x22.
91 * Conversion averaging.
92 * Up to 64 conversions/s.
93 * ALERT is triggered by open remote sensor.
94
95ADT7461
96 * Extended temperature range (breaks compatibility)
97 * Lower resolution for remote temperature
98
99MAX6657 and MAX6658:
100 * Remote sensor type selection
101
102MAX6659
103 * Selectable address
104 * Second critical temperature limit
105 * Remote sensor type selection
106
107All temperature values are given in degrees Celsius. Resolution
108is 1.0 degree for the local temperature, 0.125 degree for the remote
109temperature.
110
111Each sensor has its own high and low limits, plus a critical limit.
112Additionally, there is a relative hysteresis value common to both critical
113values. To make life easier to user-space applications, two absolute values
114are exported, one for each channel, but these values are of course linked.
115Only the local hysteresis can be set from user-space, and the same delta
116applies to the remote hysteresis.
117
118The lm90 driver will not update its values more frequently than every
119other second; reading them more often will do no harm, but will return
120'old' values.
121
diff --git a/Documentation/hwmon/lm92 b/Documentation/hwmon/lm92
new file mode 100644
index 000000000000..7705bfaa0708
--- /dev/null
+++ b/Documentation/hwmon/lm92
@@ -0,0 +1,37 @@
1Kernel driver lm92
2==================
3
4Supported chips:
5 * National Semiconductor LM92
6 Prefix: 'lm92'
7 Addresses scanned: I2C 0x48 - 0x4b
8 Datasheet: http://www.national.com/pf/LM/LM92.html
9 * National Semiconductor LM76
10 Prefix: 'lm92'
11 Addresses scanned: none, force parameter needed
12 Datasheet: http://www.national.com/pf/LM/LM76.html
13 * Maxim MAX6633/MAX6634/MAX6635
14 Prefix: 'lm92'
15 Addresses scanned: I2C 0x48 - 0x4b
16 MAX6633 with address in 0x40 - 0x47, 0x4c - 0x4f needs force parameter
17 and MAX6634 with address in 0x4c - 0x4f needs force parameter
18 Datasheet: http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3074
19
20Authors:
21 Abraham van der Merwe <abraham@2d3d.co.za>
22 Jean Delvare <khali@linux-fr.org>
23
24
25Description
26-----------
27
28This driver implements support for the National Semiconductor LM92
29temperature sensor.
30
31Each LM92 temperature sensor supports a single temperature sensor. There are
32alarms for high, low, and critical thresholds. There's also an hysteresis to
33control the thresholds for resetting alarms.
34
35Support was added later for the LM76 and Maxim MAX6633/MAX6634/MAX6635,
36which are mostly compatible. They have not all been tested, so you
37may need to use the force parameter.
diff --git a/Documentation/hwmon/max1619 b/Documentation/hwmon/max1619
new file mode 100644
index 000000000000..d6f8d9cd7d7f
--- /dev/null
+++ b/Documentation/hwmon/max1619
@@ -0,0 +1,29 @@
1Kernel driver max1619
2=====================
3
4Supported chips:
5 * Maxim MAX1619
6 Prefix: 'max1619'
7 Addresses scanned: I2C 0x18-0x1a, 0x29-0x2b, 0x4c-0x4e
8 Datasheet: Publicly available at the Maxim website
9 http://pdfserv.maxim-ic.com/en/ds/MAX1619.pdf
10
11Authors:
12 Alexey Fisher <fishor@mail.ru>,
13 Jean Delvare <khali@linux-fr.org>
14
15Description
16-----------
17
18The MAX1619 is a digital temperature sensor. It senses its own temperature as
19well as the temperature of up to one external diode.
20
21All temperature values are given in degrees Celsius. Resolution
22is 1.0 degree for the local temperature and for the remote temperature.
23
24Only the external sensor has high and low limits.
25
26The max1619 driver will not update its values more frequently than every
27other second; reading them more often will do no harm, but will return
28'old' values.
29
diff --git a/Documentation/hwmon/pc87360 b/Documentation/hwmon/pc87360
new file mode 100644
index 000000000000..89a8fcfa78df
--- /dev/null
+++ b/Documentation/hwmon/pc87360
@@ -0,0 +1,189 @@
1Kernel driver pc87360
2=====================
3
4Supported chips:
5 * National Semiconductor PC87360, PC87363, PC87364, PC87365 and PC87366
6 Prefixes: 'pc87360', 'pc87363', 'pc87364', 'pc87365', 'pc87366'
7 Addresses scanned: none, address read from Super I/O config space
8 Datasheets:
9 http://www.national.com/pf/PC/PC87360.html
10 http://www.national.com/pf/PC/PC87363.html
11 http://www.national.com/pf/PC/PC87364.html
12 http://www.national.com/pf/PC/PC87365.html
13 http://www.national.com/pf/PC/PC87366.html
14
15Authors: Jean Delvare <khali@linux-fr.org>
16
17Thanks to Sandeep Mehta, Tonko de Rooy and Daniel Ceregatti for testing.
18Thanks to Rudolf Marek for helping me investigate conversion issues.
19
20
21Module Parameters
22-----------------
23
24* init int
25 Chip initialization level:
26 0: None
27 *1: Forcibly enable internal voltage and temperature channels, except in9
28 2: Forcibly enable all voltage and temperature channels, except in9
29 3: Forcibly enable all voltage and temperature channels, including in9
30
31Note that this parameter has no effect for the PC87360, PC87363 and PC87364
32chips.
33
34Also note that for the PC87366, initialization levels 2 and 3 don't enable
35all temperature channels, because some of them share pins with each other,
36so they can't be used at the same time.
37
38
39Description
40-----------
41
42The National Semiconductor PC87360 Super I/O chip contains monitoring and
43PWM control circuitry for two fans. The PC87363 chip is similar, and the
44PC87364 chip has monitoring and PWM control for a third fan.
45
46The National Semiconductor PC87365 and PC87366 Super I/O chips are complete
47hardware monitoring chipsets, not only controlling and monitoring three fans,
48but also monitoring eleven voltage inputs and two (PC87365) or up to four
49(PC87366) temperatures.
50
51 Chip #vin #fan #pwm #temp devid
52
53 PC87360 - 2 2 - 0xE1
54 PC87363 - 2 2 - 0xE8
55 PC87364 - 3 3 - 0xE4
56 PC87365 11 3 3 2 0xE5
57 PC87366 11 3 3 3-4 0xE9
58
59The driver assumes that no more than one chip is present, and one of the
60standard Super I/O addresses is used (0x2E/0x2F or 0x4E/0x4F)
61
62Fan Monitoring
63--------------
64
65Fan rotation speeds are reported in RPM (revolutions per minute). An alarm
66is triggered if the rotation speed has dropped below a programmable limit.
67A different alarm is triggered if the fan speed is too low to be measured.
68
69Fan readings are affected by a programmable clock divider, giving the
70readings more range or accuracy. Usually, users have to learn how it works,
71but this driver implements dynamic clock divider selection, so you don't
72have to care no more.
73
74For reference, here are a few values about clock dividers:
75
76 slowest accuracy highest
77 measurable around 3000 accurate
78 divider speed (RPM) RPM (RPM) speed (RPM)
79 1 1882 18 6928
80 2 941 37 4898
81 4 470 74 3464
82 8 235 150 2449
83
84For the curious, here is how the values above were computed:
85 * slowest measurable speed: clock/(255*divider)
86 * accuracy around 3000 RPM: 3000^2/clock
87 * highest accurate speed: sqrt(clock*100)
88The clock speed for the PC87360 family is 480 kHz. I arbitrarily chose 100
89RPM as the lowest acceptable accuracy.
90
91As mentioned above, you don't have to care about this no more.
92
93Note that not all RPM values can be represented, even when the best clock
94divider is selected. This is not only true for the measured speeds, but
95also for the programmable low limits, so don't be surprised if you try to
96set, say, fan1_min to 2900 and it finally reads 2909.
97
98
99Fan Control
100-----------
101
102PWM (pulse width modulation) values range from 0 to 255, with 0 meaning
103that the fan is stopped, and 255 meaning that the fan goes at full speed.
104
105Be extremely careful when changing PWM values. Low PWM values, even
106non-zero, can stop the fan, which may cause irreversible damage to your
107hardware if temperature increases too much. When changing PWM values, go
108step by step and keep an eye on temperatures.
109
110One user reported problems with PWM. Changing PWM values would break fan
111speed readings. No explanation nor fix could be found.
112
113
114Temperature Monitoring
115----------------------
116
117Temperatures are reported in degrees Celsius. Each temperature measured has
118associated low, high and overtemperature limits, each of which triggers an
119alarm when crossed.
120
121The first two temperature channels are external. The third one (PC87366
122only) is internal.
123
124The PC87366 has three additional temperature channels, based on
125thermistors (as opposed to thermal diodes for the first three temperature
126channels). For technical reasons, these channels are held by the VLM
127(voltage level monitor) logical device, not the TMS (temperature
128measurement) one. As a consequence, these temperatures are exported as
129voltages, and converted into temperatures in user-space.
130
131Note that these three additional channels share their pins with the
132external thermal diode channels, so you (physically) can't use them all at
133the same time. Although it should be possible to mix the two sensor types,
134the documents from National Semiconductor suggest that motherboard
135manufacturers should choose one type and stick to it. So you will more
136likely have either channels 1 to 3 (thermal diodes) or 3 to 6 (internal
137thermal diode, and thermistors).
138
139
140Voltage Monitoring
141------------------
142
143Voltages are reported relatively to a reference voltage, either internal or
144external. Some of them (in7:Vsb, in8:Vdd and in10:AVdd) are divided by two
145internally, you will have to compensate in sensors.conf. Others (in0 to in6)
146are likely to be divided externally. The meaning of each of these inputs as
147well as the values of the resistors used for division is left to the
148motherboard manufacturers, so you will have to document yourself and edit
149sensors.conf accordingly. National Semiconductor has a document with
150recommended resistor values for some voltages, but this still leaves much
151room for per motherboard specificities, unfortunately. Even worse,
152motherboard manufacturers don't seem to care about National Semiconductor's
153recommendations.
154
155Each voltage measured has associated low and high limits, each of which
156triggers an alarm when crossed.
157
158When available, VID inputs are used to provide the nominal CPU Core voltage.
159The driver will default to VRM 9.0, but this can be changed from user-space.
160The chipsets can handle two sets of VID inputs (on dual-CPU systems), but
161the driver will only export one for now. This may change later if there is
162a need.
163
164
165General Remarks
166---------------
167
168If an alarm triggers, it will remain triggered until the hardware register
169is read at least once. This means that the cause for the alarm may already
170have disappeared! Note that all hardware registers are read whenever any
171data is read (unless it is less than 2 seconds since the last update, in
172which case cached values are returned instead). As a consequence, when
173a once-only alarm triggers, it may take 2 seconds for it to show, and 2
174more seconds for it to disappear.
175
176Monitoring of in9 isn't enabled at lower init levels (<3) because that
177channel measures the battery voltage (Vbat). It is a known fact that
178repeatedly sampling the battery voltage reduces its lifetime. National
179Semiconductor smartly designed their chipset so that in9 is sampled only
180once every 1024 sampling cycles (that is every 34 minutes at the default
181sampling rate), so the effect is attenuated, but still present.
182
183
184Limitations
185-----------
186
187The datasheets suggests that some values (fan mins, fan dividers)
188shouldn't be changed once the monitoring has started, but we ignore that
189recommendation. We'll reconsider if it actually causes trouble.
diff --git a/Documentation/hwmon/sis5595 b/Documentation/hwmon/sis5595
new file mode 100644
index 000000000000..b7ae36b8cdf5
--- /dev/null
+++ b/Documentation/hwmon/sis5595
@@ -0,0 +1,106 @@
1Kernel driver sis5595
2=====================
3
4Supported chips:
5 * Silicon Integrated Systems Corp. SiS5595 Southbridge Hardware Monitor
6 Prefix: 'sis5595'
7 Addresses scanned: ISA in PCI-space encoded address
8 Datasheet: Publicly available at the Silicon Integrated Systems Corp. site.
9
10Authors:
11 Kyösti Mälkki <kmalkki@cc.hut.fi>,
12 Mark D. Studebaker <mdsxyz123@yahoo.com>,
13 Aurelien Jarno <aurelien@aurel32.net> 2.6 port
14
15 SiS southbridge has a LM78-like chip integrated on the same IC.
16 This driver is a customized copy of lm78.c
17
18 Supports following revisions:
19 Version PCI ID PCI Revision
20 1 1039/0008 AF or less
21 2 1039/0008 B0 or greater
22
23 Note: these chips contain a 0008 device which is incompatible with the
24 5595. We recognize these by the presence of the listed
25 "blacklist" PCI ID and refuse to load.
26
27 NOT SUPPORTED PCI ID BLACKLIST PCI ID
28 540 0008 0540
29 550 0008 0550
30 5513 0008 5511
31 5581 0008 5597
32 5582 0008 5597
33 5597 0008 5597
34 630 0008 0630
35 645 0008 0645
36 730 0008 0730
37 735 0008 0735
38
39
40Module Parameters
41-----------------
42force_addr=0xaddr Set the I/O base address. Useful for boards
43 that don't set the address in the BIOS. Does not do a
44 PCI force; the device must still be present in lspci.
45 Don't use this unless the driver complains that the
46 base address is not set.
47 Example: 'modprobe sis5595 force_addr=0x290'
48
49
50Description
51-----------
52
53The SiS5595 southbridge has integrated hardware monitor functions. It also
54has an I2C bus, but this driver only supports the hardware monitor. For the
55I2C bus driver see i2c-sis5595.
56
57The SiS5595 implements zero or one temperature sensor, two fan speed
58sensors, four or five voltage sensors, and alarms.
59
60On the first version of the chip, there are four voltage sensors and one
61temperature sensor.
62
63On the second version of the chip, the temperature sensor (temp) and the
64fifth voltage sensor (in4) share a pin which is configurable, but not
65through the driver. Sorry. The driver senses the configuration of the pin,
66which was hopefully set by the BIOS.
67
68Temperatures are measured in degrees Celsius. An alarm is triggered once
69when the max is crossed; it is also triggered when it drops below the min
70value. Measurements are guaranteed between -55 and +125 degrees, with a
71resolution of 1 degree.
72
73Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
74triggered if the rotation speed has dropped below a programmable limit. Fan
75readings can be divided by a programmable divider (1, 2, 4 or 8) to give
76the readings more range or accuracy. Not all RPM values can accurately be
77represented, so some rounding is done. With a divider of 2, the lowest
78representable value is around 2600 RPM.
79
80Voltage sensors (also known as IN sensors) report their values in volts. An
81alarm is triggered if the voltage has crossed a programmable minimum or
82maximum limit. Note that minimum in this case always means 'closest to
83zero'; this is important for negative voltage measurements. All voltage
84inputs can measure voltages between 0 and 4.08 volts, with a resolution of
850.016 volt.
86
87In addition to the alarms described above, there is a BTI alarm, which gets
88triggered when an external chip has crossed its limits. Usually, this is
89connected to some LM75-like chip; if at least one crosses its limits, this
90bit gets set.
91
92If an alarm triggers, it will remain triggered until the hardware register
93is read at least once. This means that the cause for the alarm may already
94have disappeared! Note that in the current implementation, all hardware
95registers are read whenever any data is read (unless it is less than 1.5
96seconds since the last update). This means that you can easily miss
97once-only alarms.
98
99The SiS5595 only updates its values each 1.5 seconds; reading it more often
100will do no harm, but will return 'old' values.
101
102Problems
103--------
104Some chips refuse to be enabled. We don't know why.
105The driver will recognize this and print a message in dmesg.
106
diff --git a/Documentation/hwmon/smsc47b397 b/Documentation/hwmon/smsc47b397
new file mode 100644
index 000000000000..da9d80c96432
--- /dev/null
+++ b/Documentation/hwmon/smsc47b397
@@ -0,0 +1,158 @@
1Kernel driver smsc47b397
2========================
3
4Supported chips:
5 * SMSC LPC47B397-NC
6 Prefix: 'smsc47b397'
7 Addresses scanned: none, address read from Super I/O config space
8 Datasheet: In this file
9
10Authors: Mark M. Hoffman <mhoffman@lightlink.com>
11 Utilitek Systems, Inc.
12
13November 23, 2004
14
15The following specification describes the SMSC LPC47B397-NC sensor chip
16(for which there is no public datasheet available). This document was
17provided by Craig Kelly (In-Store Broadcast Network) and edited/corrected
18by Mark M. Hoffman <mhoffman@lightlink.com>.
19
20* * * * *
21
22Methods for detecting the HP SIO and reading the thermal data on a dc7100.
23
24The thermal information on the dc7100 is contained in the SIO Hardware Monitor
25(HWM). The information is accessed through an index/data pair. The index/data
26pair is located at the HWM Base Address + 0 and the HWM Base Address + 1. The
27HWM Base address can be obtained from Logical Device 8, registers 0x60 (MSB)
28and 0x61 (LSB). Currently we are using 0x480 for the HWM Base Address and
290x480 and 0x481 for the index/data pair.
30
31Reading temperature information.
32The temperature information is located in the following registers:
33Temp1 0x25 (Currently, this reflects the CPU temp on all systems).
34Temp2 0x26
35Temp3 0x27
36Temp4 0x80
37
38Programming Example
39The following is an example of how to read the HWM temperature registers:
40MOV DX,480H
41MOV AX,25H
42OUT DX,AL
43MOV DX,481H
44IN AL,DX
45
46AL contains the data in hex, the temperature in Celsius is the decimal
47equivalent.
48
49Ex: If AL contains 0x2A, the temperature is 42 degrees C.
50
51Reading tach information.
52The fan speed information is located in the following registers:
53 LSB MSB
54Tach1 0x28 0x29 (Currently, this reflects the CPU
55 fan speed on all systems).
56Tach2 0x2A 0x2B
57Tach3 0x2C 0x2D
58Tach4 0x2E 0x2F
59
60Important!!!
61Reading the tach LSB locks the tach MSB.
62The LSB Must be read first.
63
64How to convert the tach reading to RPM.
65The tach reading (TCount) is given by: (Tach MSB * 256) + (Tach LSB)
66The SIO counts the number of 90kHz (11.111us) pulses per revolution.
67RPM = 60/(TCount * 11.111us)
68
69Example:
70Reg 0x28 = 0x9B
71Reg 0x29 = 0x08
72
73TCount = 0x89B = 2203
74
75RPM = 60 / (2203 * 11.11111 E-6) = 2451 RPM
76
77Obtaining the SIO version.
78
79CONFIGURATION SEQUENCE
80To program the configuration registers, the following sequence must be followed:
811. Enter Configuration Mode
822. Configure the Configuration Registers
833. Exit Configuration Mode.
84
85Enter Configuration Mode
86To place the chip into the Configuration State The config key (0x55) is written
87to the CONFIG PORT (0x2E).
88
89Configuration Mode
90In configuration mode, the INDEX PORT is located at the CONFIG PORT address and
91the DATA PORT is at INDEX PORT address + 1.
92
93The desired configuration registers are accessed in two steps:
94a. Write the index of the Logical Device Number Configuration Register
95 (i.e., 0x07) to the INDEX PORT and then write the number of the
96 desired logical device to the DATA PORT.
97
98b. Write the address of the desired configuration register within the
99 logical device to the INDEX PORT and then write or read the config-
100 uration register through the DATA PORT.
101
102Note: If accessing the Global Configuration Registers, step (a) is not required.
103
104Exit Configuration Mode
105To exit the Configuration State the write 0xAA to the CONFIG PORT (0x2E).
106The chip returns to the RUN State. (This is important).
107
108Programming Example
109The following is an example of how to read the SIO Device ID located at 0x20
110
111; ENTER CONFIGURATION MODE
112MOV DX,02EH
113MOV AX,055H
114OUT DX,AL
115; GLOBAL CONFIGURATION REGISTER
116MOV DX,02EH
117MOV AL,20H
118OUT DX,AL
119; READ THE DATA
120MOV DX,02FH
121IN AL,DX
122; EXIT CONFIGURATION MODE
123MOV DX,02EH
124MOV AX,0AAH
125OUT DX,AL
126
127The registers of interest for identifying the SIO on the dc7100 are Device ID
128(0x20) and Device Rev (0x21).
129
130The Device ID will read 0X6F
131The Device Rev currently reads 0x01
132
133Obtaining the HWM Base Address.
134The following is an example of how to read the HWM Base Address located in
135Logical Device 8.
136
137; ENTER CONFIGURATION MODE
138MOV DX,02EH
139MOV AX,055H
140OUT DX,AL
141; CONFIGURE REGISTER CRE0,
142; LOGICAL DEVICE 8
143MOV DX,02EH
144MOV AL,07H
145OUT DX,AL ;Point to LD# Config Reg
146MOV DX,02FH
147MOV AL, 08H
148OUT DX,AL;Point to Logical Device 8
149;
150MOV DX,02EH
151MOV AL,60H
152OUT DX,AL ; Point to HWM Base Addr MSB
153MOV DX,02FH
154IN AL,DX ; Get MSB of HWM Base Addr
155; EXIT CONFIGURATION MODE
156MOV DX,02EH
157MOV AX,0AAH
158OUT DX,AL
diff --git a/Documentation/hwmon/smsc47m1 b/Documentation/hwmon/smsc47m1
new file mode 100644
index 000000000000..34e6478c1425
--- /dev/null
+++ b/Documentation/hwmon/smsc47m1
@@ -0,0 +1,52 @@
1Kernel driver smsc47m1
2======================
3
4Supported chips:
5 * SMSC LPC47B27x, LPC47M10x, LPC47M13x, LPC47M14x, LPC47M15x and LPC47M192
6 Addresses scanned: none, address read from Super I/O config space
7 Prefix: 'smsc47m1'
8 Datasheets:
9 http://www.smsc.com/main/datasheets/47b27x.pdf
10 http://www.smsc.com/main/datasheets/47m10x.pdf
11 http://www.smsc.com/main/tools/discontinued/47m13x.pdf
12 http://www.smsc.com/main/datasheets/47m14x.pdf
13 http://www.smsc.com/main/tools/discontinued/47m15x.pdf
14 http://www.smsc.com/main/datasheets/47m192.pdf
15
16Authors:
17 Mark D. Studebaker <mdsxyz123@yahoo.com>,
18 With assistance from Bruce Allen <ballen@uwm.edu>, and his
19 fan.c program: http://www.lsc-group.phys.uwm.edu/%7Eballen/driver/
20 Gabriele Gorla <gorlik@yahoo.com>,
21 Jean Delvare <khali@linux-fr.org>
22
23Description
24-----------
25
26The Standard Microsystems Corporation (SMSC) 47M1xx Super I/O chips
27contain monitoring and PWM control circuitry for two fans.
28
29The 47M15x and 47M192 chips contain a full 'hardware monitoring block'
30in addition to the fan monitoring and control. The hardware monitoring
31block is not supported by the driver.
32
33Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
34triggered if the rotation speed has dropped below a programmable limit. Fan
35readings can be divided by a programmable divider (1, 2, 4 or 8) to give
36the readings more range or accuracy. Not all RPM values can accurately be
37represented, so some rounding is done. With a divider of 2, the lowest
38representable value is around 2600 RPM.
39
40PWM values are from 0 to 255.
41
42If an alarm triggers, it will remain triggered until the hardware register
43is read at least once. This means that the cause for the alarm may
44already have disappeared! Note that in the current implementation, all
45hardware registers are read whenever any data is read (unless it is less
46than 1.5 seconds since the last update). This means that you can easily
47miss once-only alarms.
48
49
50**********************
51The lm_sensors project gratefully acknowledges the support of
52Intel in the development of this driver.
diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
new file mode 100644
index 000000000000..346400519d0d
--- /dev/null
+++ b/Documentation/hwmon/sysfs-interface
@@ -0,0 +1,274 @@
1Naming and data format standards for sysfs files
2------------------------------------------------
3
4The libsensors library offers an interface to the raw sensors data
5through the sysfs interface. See libsensors documentation and source for
6more further information. As of writing this document, libsensors
7(from lm_sensors 2.8.3) is heavily chip-dependant. Adding or updating
8support for any given chip requires modifying the library's code.
9This is because libsensors was written for the procfs interface
10older kernel modules were using, which wasn't standardized enough.
11Recent versions of libsensors (from lm_sensors 2.8.2 and later) have
12support for the sysfs interface, though.
13
14The new sysfs interface was designed to be as chip-independant as
15possible.
16
17Note that motherboards vary widely in the connections to sensor chips.
18There is no standard that ensures, for example, that the second
19temperature sensor is connected to the CPU, or that the second fan is on
20the CPU. Also, some values reported by the chips need some computation
21before they make full sense. For example, most chips can only measure
22voltages between 0 and +4V. Other voltages are scaled back into that
23range using external resistors. Since the values of these resistors
24can change from motherboard to motherboard, the conversions cannot be
25hard coded into the driver and have to be done in user space.
26
27For this reason, even if we aim at a chip-independant libsensors, it will
28still require a configuration file (e.g. /etc/sensors.conf) for proper
29values conversion, labeling of inputs and hiding of unused inputs.
30
31An alternative method that some programs use is to access the sysfs
32files directly. This document briefly describes the standards that the
33drivers follow, so that an application program can scan for entries and
34access this data in a simple and consistent way. That said, such programs
35will have to implement conversion, labeling and hiding of inputs. For
36this reason, it is still not recommended to bypass the library.
37
38If you are developing a userspace application please send us feedback on
39this standard.
40
41Note that this standard isn't completely established yet, so it is subject
42to changes, even important ones. One more reason to use the library instead
43of accessing sysfs files directly.
44
45Each chip gets its own directory in the sysfs /sys/devices tree. To
46find all sensor chips, it is easier to follow the symlinks from
47/sys/i2c/devices/
48
49All sysfs values are fixed point numbers. To get the true value of some
50of the values, you should divide by the specified value.
51
52There is only one value per file, unlike the older /proc specification.
53The common scheme for files naming is: <type><number>_<item>. Usual
54types for sensor chips are "in" (voltage), "temp" (temperature) and
55"fan" (fan). Usual items are "input" (measured value), "max" (high
56threshold, "min" (low threshold). Numbering usually starts from 1,
57except for voltages which start from 0 (because most data sheets use
58this). A number is always used for elements that can be present more
59than once, even if there is a single element of the given type on the
60specific chip. Other files do not refer to a specific element, so
61they have a simple name, and no number.
62
63Alarms are direct indications read from the chips. The drivers do NOT
64make comparisons of readings to thresholds. This allows violations
65between readings to be caught and alarmed. The exact definition of an
66alarm (for example, whether a threshold must be met or must be exceeded
67to cause an alarm) is chip-dependent.
68
69
70-------------------------------------------------------------------------
71
72************
73* Voltages *
74************
75
76in[0-8]_min Voltage min value.
77 Unit: millivolt
78 Read/Write
79
80in[0-8]_max Voltage max value.
81 Unit: millivolt
82 Read/Write
83
84in[0-8]_input Voltage input value.
85 Unit: millivolt
86 Read only
87 Actual voltage depends on the scaling resistors on the
88 motherboard, as recommended in the chip datasheet.
89 This varies by chip and by motherboard.
90 Because of this variation, values are generally NOT scaled
91 by the chip driver, and must be done by the application.
92 However, some drivers (notably lm87 and via686a)
93 do scale, with various degrees of success.
94 These drivers will output the actual voltage.
95
96 Typical usage:
97 in0_* CPU #1 voltage (not scaled)
98 in1_* CPU #2 voltage (not scaled)
99 in2_* 3.3V nominal (not scaled)
100 in3_* 5.0V nominal (scaled)
101 in4_* 12.0V nominal (scaled)
102 in5_* -12.0V nominal (scaled)
103 in6_* -5.0V nominal (scaled)
104 in7_* varies
105 in8_* varies
106
107cpu[0-1]_vid CPU core reference voltage.
108 Unit: millivolt
109 Read only.
110 Not always correct.
111
112vrm Voltage Regulator Module version number.
113 Read only.
114 Two digit number, first is major version, second is
115 minor version.
116 Affects the way the driver calculates the CPU core reference
117 voltage from the vid pins.
118
119
120********
121* Fans *
122********
123
124fan[1-3]_min Fan minimum value
125 Unit: revolution/min (RPM)
126 Read/Write.
127
128fan[1-3]_input Fan input value.
129 Unit: revolution/min (RPM)
130 Read only.
131
132fan[1-3]_div Fan divisor.
133 Integer value in powers of two (1, 2, 4, 8, 16, 32, 64, 128).
134 Some chips only support values 1, 2, 4 and 8.
135 Note that this is actually an internal clock divisor, which
136 affects the measurable speed range, not the read value.
137
138*******
139* PWM *
140*******
141
142pwm[1-3] Pulse width modulation fan control.
143 Integer value in the range 0 to 255
144 Read/Write
145 255 is max or 100%.
146
147pwm[1-3]_enable
148 Switch PWM on and off.
149 Not always present even if fan*_pwm is.
150 0 to turn off
151 1 to turn on in manual mode
152 2 to turn on in automatic mode
153 Read/Write
154
155pwm[1-*]_auto_channels_temp
156 Select which temperature channels affect this PWM output in
157 auto mode. Bitfield, 1 is temp1, 2 is temp2, 4 is temp3 etc...
158 Which values are possible depend on the chip used.
159
160pwm[1-*]_auto_point[1-*]_pwm
161pwm[1-*]_auto_point[1-*]_temp
162pwm[1-*]_auto_point[1-*]_temp_hyst
163 Define the PWM vs temperature curve. Number of trip points is
164 chip-dependent. Use this for chips which associate trip points
165 to PWM output channels.
166
167OR
168
169temp[1-*]_auto_point[1-*]_pwm
170temp[1-*]_auto_point[1-*]_temp
171temp[1-*]_auto_point[1-*]_temp_hyst
172 Define the PWM vs temperature curve. Number of trip points is
173 chip-dependent. Use this for chips which associate trip points
174 to temperature channels.
175
176
177****************
178* Temperatures *
179****************
180
181temp[1-3]_type Sensor type selection.
182 Integers 1, 2, 3 or thermistor Beta value (3435)
183 Read/Write.
184 1: PII/Celeron Diode
185 2: 3904 transistor
186 3: thermal diode
187 Not all types are supported by all chips
188
189temp[1-4]_max Temperature max value.
190 Unit: millidegree Celcius
191 Read/Write value.
192
193temp[1-3]_min Temperature min value.
194 Unit: millidegree Celcius
195 Read/Write value.
196
197temp[1-3]_max_hyst
198 Temperature hysteresis value for max limit.
199 Unit: millidegree Celcius
200 Must be reported as an absolute temperature, NOT a delta
201 from the max value.
202 Read/Write value.
203
204temp[1-4]_input Temperature input value.
205 Unit: millidegree Celcius
206 Read only value.
207
208temp[1-4]_crit Temperature critical value, typically greater than
209 corresponding temp_max values.
210 Unit: millidegree Celcius
211 Read/Write value.
212
213temp[1-2]_crit_hyst
214 Temperature hysteresis value for critical limit.
215 Unit: millidegree Celcius
216 Must be reported as an absolute temperature, NOT a delta
217 from the critical value.
218 Read/Write value.
219
220 If there are multiple temperature sensors, temp1_* is
221 generally the sensor inside the chip itself,
222 reported as "motherboard temperature". temp2_* to
223 temp4_* are generally sensors external to the chip
224 itself, for example the thermal diode inside the CPU or
225 a thermistor nearby.
226
227
228************
229* Currents *
230************
231
232Note that no known chip provides current measurements as of writing,
233so this part is theoretical, so to say.
234
235curr[1-n]_max Current max value
236 Unit: milliampere
237 Read/Write.
238
239curr[1-n]_min Current min value.
240 Unit: milliampere
241 Read/Write.
242
243curr[1-n]_input Current input value
244 Unit: milliampere
245 Read only.
246
247
248*********
249* Other *
250*********
251
252alarms Alarm bitmask.
253 Read only.
254 Integer representation of one to four bytes.
255 A '1' bit means an alarm.
256 Chips should be programmed for 'comparator' mode so that
257 the alarm will 'come back' after you read the register
258 if it is still valid.
259 Generally a direct representation of a chip's internal
260 alarm registers; there is no standard for the position
261 of individual bits.
262 Bits are defined in kernel/include/sensors.h.
263
264beep_enable Beep/interrupt enable
265 0 to disable.
266 1 to enable.
267 Read/Write
268
269beep_mask Bitmask for beep.
270 Same format as 'alarms' with the same bit locations.
271 Read/Write
272
273eeprom Raw EEPROM data in binary form.
274 Read only.
diff --git a/Documentation/hwmon/userspace-tools b/Documentation/hwmon/userspace-tools
new file mode 100644
index 000000000000..2622aac65422
--- /dev/null
+++ b/Documentation/hwmon/userspace-tools
@@ -0,0 +1,39 @@
1Introduction
2------------
3
4Most mainboards have sensor chips to monitor system health (like temperatures,
5voltages, fans speed). They are often connected through an I2C bus, but some
6are also connected directly through the ISA bus.
7
8The kernel drivers make the data from the sensor chips available in the /sys
9virtual filesystem. Userspace tools are then used to display or set or the
10data in a more friendly manner.
11
12Lm-sensors
13----------
14
15Core set of utilites that will allow you to obtain health information,
16setup monitoring limits etc. You can get them on their homepage
17http://www.lm-sensors.nu/ or as a package from your Linux distribution.
18
19If from website:
20Get lmsensors from project web site. Please note, you need only userspace
21part, so compile with "make user_install" target.
22
23General hints to get things working:
24
250) get lm-sensors userspace utils
261) compile all drivers in I2C section as modules in your kernel
272) run sensors-detect script, it will tell you what modules you need to load.
283) load them and run "sensors" command, you should see some results.
294) fix sensors.conf, labels, limits, fan divisors
305) if any more problems consult FAQ, or documentation
31
32Other utilites
33--------------
34
35If you want some graphical indicators of system health look for applications
36like: gkrellm, ksensors, xsensors, wmtemp, wmsensors, wmgtemp, ksysguardd,
37hardware-monitor
38
39If you are server administrator you can try snmpd or mrtgutils.
diff --git a/Documentation/hwmon/via686a b/Documentation/hwmon/via686a
new file mode 100644
index 000000000000..b82014cb7c53
--- /dev/null
+++ b/Documentation/hwmon/via686a
@@ -0,0 +1,65 @@
1Kernel driver via686a
2=====================
3
4Supported chips:
5 * Via VT82C686A, VT82C686B Southbridge Integrated Hardware Monitor
6 Prefix: 'via686a'
7 Addresses scanned: ISA in PCI-space encoded address
8 Datasheet: On request through web form (http://www.via.com.tw/en/support/datasheets/)
9
10Authors:
11 Kyösti Mälkki <kmalkki@cc.hut.fi>,
12 Mark D. Studebaker <mdsxyz123@yahoo.com>
13 Bob Dougherty <bobd@stanford.edu>
14 (Some conversion-factor data were contributed by
15 Jonathan Teh Soon Yew <j.teh@iname.com>
16 and Alex van Kaam <darkside@chello.nl>.)
17
18Module Parameters
19-----------------
20
21force_addr=0xaddr Set the I/O base address. Useful for Asus A7V boards
22 that don't set the address in the BIOS. Does not do a
23 PCI force; the via686a must still be present in lspci.
24 Don't use this unless the driver complains that the
25 base address is not set.
26 Example: 'modprobe via686a force_addr=0x6000'
27
28Description
29-----------
30
31The driver does not distinguish between the chips and reports
32all as a 686A.
33
34The Via 686a southbridge has integrated hardware monitor functionality.
35It also has an I2C bus, but this driver only supports the hardware monitor.
36For the I2C bus driver, see <file:Documentation/i2c/busses/i2c-viapro>
37
38The Via 686a implements three temperature sensors, two fan rotation speed
39sensors, five voltage sensors and alarms.
40
41Temperatures are measured in degrees Celsius. An alarm is triggered once
42when the Overtemperature Shutdown limit is crossed; it is triggered again
43as soon as it drops below the hysteresis value.
44
45Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
46triggered if the rotation speed has dropped below a programmable limit. Fan
47readings can be divided by a programmable divider (1, 2, 4 or 8) to give
48the readings more range or accuracy. Not all RPM values can accurately be
49represented, so some rounding is done. With a divider of 2, the lowest
50representable value is around 2600 RPM.
51
52Voltage sensors (also known as IN sensors) report their values in volts.
53An alarm is triggered if the voltage has crossed a programmable minimum
54or maximum limit. Voltages are internally scalled, so each voltage channel
55has a different resolution and range.
56
57If an alarm triggers, it will remain triggered until the hardware register
58is read at least once. This means that the cause for the alarm may
59already have disappeared! Note that in the current implementation, all
60hardware registers are read whenever any data is read (unless it is less
61than 1.5 seconds since the last update). This means that you can easily
62miss once-only alarms.
63
64The driver only updates its values each 1.5 seconds; reading it more often
65will do no harm, but will return 'old' values.
diff --git a/Documentation/hwmon/w83627hf b/Documentation/hwmon/w83627hf
new file mode 100644
index 000000000000..78f37c2d602e
--- /dev/null
+++ b/Documentation/hwmon/w83627hf
@@ -0,0 +1,66 @@
1Kernel driver w83627hf
2======================
3
4Supported chips:
5 * Winbond W83627HF (ISA accesses ONLY)
6 Prefix: 'w83627hf'
7 Addresses scanned: ISA address retrieved from Super I/O registers
8 Datasheet: http://www.winbond.com/PDF/sheet/w83627hf.pdf
9 * Winbond W83627THF
10 Prefix: 'w83627thf'
11 Addresses scanned: ISA address retrieved from Super I/O registers
12 Datasheet: http://www.winbond.com/PDF/sheet/w83627thf.pdf
13 * Winbond W83697HF
14 Prefix: 'w83697hf'
15 Addresses scanned: ISA address retrieved from Super I/O registers
16 Datasheet: http://www.winbond.com/PDF/sheet/697hf.pdf
17 * Winbond W83637HF
18 Prefix: 'w83637hf'
19 Addresses scanned: ISA address retrieved from Super I/O registers
20 Datasheet: http://www.winbond.com/PDF/sheet/w83637hf.pdf
21
22Authors:
23 Frodo Looijaard <frodol@dds.nl>,
24 Philip Edelbrock <phil@netroedge.com>,
25 Mark Studebaker <mdsxyz123@yahoo.com>,
26 Bernhard C. Schrenk <clemy@clemy.org>
27
28Module Parameters
29-----------------
30
31* force_addr: int
32 Initialize the ISA address of the sensors
33* force_i2c: int
34 Initialize the I2C address of the sensors
35* init: int
36 (default is 1)
37 Use 'init=0' to bypass initializing the chip.
38 Try this if your computer crashes when you load the module.
39
40Description
41-----------
42
43This driver implements support for ISA accesses *only* for
44the Winbond W83627HF, W83627THF, W83697HF and W83637HF Super I/O chips.
45We will refer to them collectively as Winbond chips.
46
47This driver supports ISA accesses, which should be more reliable
48than i2c accesses. Also, for Tyan boards which contain both a
49Super I/O chip and a second i2c-only Winbond chip (often a W83782D),
50using this driver will avoid i2c address conflicts and complex
51initialization that were required in the w83781d driver.
52
53If you really want i2c accesses for these Super I/O chips,
54use the w83781d driver. However this is not the preferred method
55now that this ISA driver has been developed.
56
57Technically, the w83627thf does not support a VID reading. However, it's
58possible or even likely that your mainboard maker has routed these signals
59to a specific set of general purpose IO pins (the Asus P4C800-E is one such
60board). The w83627thf driver now interprets these as VID. If the VID on
61your board doesn't work, first see doc/vid in the lm_sensors package. If
62that still doesn't help, email us at lm-sensors@lm-sensors.org.
63
64For further information on this driver see the w83781d driver
65documentation.
66
diff --git a/Documentation/hwmon/w83781d b/Documentation/hwmon/w83781d
new file mode 100644
index 000000000000..e5459333ba68
--- /dev/null
+++ b/Documentation/hwmon/w83781d
@@ -0,0 +1,402 @@
1Kernel driver w83781d
2=====================
3
4Supported chips:
5 * Winbond W83781D
6 Prefix: 'w83781d'
7 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
8 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83781d.pdf
9 * Winbond W83782D
10 Prefix: 'w83782d'
11 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
12 Datasheet: http://www.winbond.com/PDF/sheet/w83782d.pdf
13 * Winbond W83783S
14 Prefix: 'w83783s'
15 Addresses scanned: I2C 0x2d
16 Datasheet: http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/w83783s.pdf
17 * Winbond W83627HF
18 Prefix: 'w83627hf'
19 Addresses scanned: I2C 0x20 - 0x2f, ISA 0x290 (8 I/O ports)
20 Datasheet: http://www.winbond.com/PDF/sheet/w83627hf.pdf
21 * Asus AS99127F
22 Prefix: 'as99127f'
23 Addresses scanned: I2C 0x28 - 0x2f
24 Datasheet: Unavailable from Asus
25
26Authors:
27 Frodo Looijaard <frodol@dds.nl>,
28 Philip Edelbrock <phil@netroedge.com>,
29 Mark Studebaker <mdsxyz123@yahoo.com>
30
31Module parameters
32-----------------
33
34* init int
35 (default 1)
36 Use 'init=0' to bypass initializing the chip.
37 Try this if your computer crashes when you load the module.
38
39force_subclients=bus,caddr,saddr,saddr
40 This is used to force the i2c addresses for subclients of
41 a certain chip. Typical usage is `force_subclients=0,0x2d,0x4a,0x4b'
42 to force the subclients of chip 0x2d on bus 0 to i2c addresses
43 0x4a and 0x4b. This parameter is useful for certain Tyan boards.
44
45Description
46-----------
47
48This driver implements support for the Winbond W83781D, W83782D, W83783S,
49W83627HF chips, and the Asus AS99127F chips. We will refer to them
50collectively as W8378* chips.
51
52There is quite some difference between these chips, but they are similar
53enough that it was sensible to put them together in one driver.
54The W83627HF chip is assumed to be identical to the ISA W83782D.
55The Asus chips are similar to an I2C-only W83782D.
56
57Chip #vin #fanin #pwm #temp wchipid vendid i2c ISA
58as99127f 7 3 0 3 0x31 0x12c3 yes no
59as99127f rev.2 (type_name = as99127f) 0x31 0x5ca3 yes no
60w83781d 7 3 0 3 0x10-1 0x5ca3 yes yes
61w83627hf 9 3 2 3 0x21 0x5ca3 yes yes(LPC)
62w83782d 9 3 2-4 3 0x30 0x5ca3 yes yes
63w83783s 5-6 3 2 1-2 0x40 0x5ca3 yes no
64
65Detection of these chips can sometimes be foiled because they can be in
66an internal state that allows no clean access. If you know the address
67of the chip, use a 'force' parameter; this will put them into a more
68well-behaved state first.
69
70The W8378* implements temperature sensors (three on the W83781D and W83782D,
71two on the W83783S), three fan rotation speed sensors, voltage sensors
72(seven on the W83781D, nine on the W83782D and six on the W83783S), VID
73lines, alarms with beep warnings, and some miscellaneous stuff.
74
75Temperatures are measured in degrees Celsius. There is always one main
76temperature sensor, and one (W83783S) or two (W83781D and W83782D) other
77sensors. An alarm is triggered for the main sensor once when the
78Overtemperature Shutdown limit is crossed; it is triggered again as soon as
79it drops below the Hysteresis value. A more useful behavior
80can be found by setting the Hysteresis value to +127 degrees Celsius; in
81this case, alarms are issued during all the time when the actual temperature
82is above the Overtemperature Shutdown value. The driver sets the
83hysteresis value for temp1 to 127 at initialization.
84
85For the other temperature sensor(s), an alarm is triggered when the
86temperature gets higher then the Overtemperature Shutdown value; it stays
87on until the temperature falls below the Hysteresis value. But on the
88W83781D, there is only one alarm that functions for both other sensors!
89Temperatures are guaranteed within a range of -55 to +125 degrees. The
90main temperature sensors has a resolution of 1 degree; the other sensor(s)
91of 0.5 degree.
92
93Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
94triggered if the rotation speed has dropped below a programmable limit. Fan
95readings can be divided by a programmable divider (1, 2, 4 or 8 for the
96W83781D; 1, 2, 4, 8, 16, 32, 64 or 128 for the others) to give
97the readings more range or accuracy. Not all RPM values can accurately
98be represented, so some rounding is done. With a divider of 2, the lowest
99representable value is around 2600 RPM.
100
101Voltage sensors (also known as IN sensors) report their values in volts.
102An alarm is triggered if the voltage has crossed a programmable minimum
103or maximum limit. Note that minimum in this case always means 'closest to
104zero'; this is important for negative voltage measurements. All voltage
105inputs can measure voltages between 0 and 4.08 volts, with a resolution
106of 0.016 volt.
107
108The VID lines encode the core voltage value: the voltage level your processor
109should work with. This is hardcoded by the mainboard and/or processor itself.
110It is a value in volts. When it is unconnected, you will often find the
111value 3.50 V here.
112
113The W83782D and W83783S temperature conversion machine understands about
114several kinds of temperature probes. You can program the so-called
115beta value in the sensor files. '1' is the PII/Celeron diode, '2' is the
116TN3904 transistor, and 3435 the default thermistor value. Other values
117are (not yet) supported.
118
119In addition to the alarms described above, there is a CHAS alarm on the
120chips which triggers if your computer case is open.
121
122When an alarm goes off, you can be warned by a beeping signal through
123your computer speaker. It is possible to enable all beeping globally,
124or only the beeping for some alarms.
125
126If an alarm triggers, it will remain triggered until the hardware register
127is read at least once. This means that the cause for the alarm may
128already have disappeared! Note that in the current implementation, all
129hardware registers are read whenever any data is read (unless it is less
130than 1.5 seconds since the last update). This means that you can easily
131miss once-only alarms.
132
133The chips only update values each 1.5 seconds; reading them more often
134will do no harm, but will return 'old' values.
135
136AS99127F PROBLEMS
137-----------------
138The as99127f support was developed without the benefit of a datasheet.
139In most cases it is treated as a w83781d (although revision 2 of the
140AS99127F looks more like a w83782d).
141This support will be BETA until a datasheet is released.
142One user has reported problems with fans stopping
143occasionally.
144
145Note that the individual beep bits are inverted from the other chips.
146The driver now takes care of this so that user-space applications
147don't have to know about it.
148
149Known problems:
150 - Problems with diode/thermistor settings (supported?)
151 - One user reports fans stopping under high server load.
152 - Revision 2 seems to have 2 PWM registers but we don't know
153 how to handle them. More details below.
154
155These will not be fixed unless we get a datasheet.
156If you have problems, please lobby Asus to release a datasheet.
157Unfortunately several others have without success.
158Please do not send mail to us asking for better as99127f support.
159We have done the best we can without a datasheet.
160Please do not send mail to the author or the sensors group asking for
161a datasheet or ideas on how to convince Asus. We can't help.
162
163
164NOTES:
165-----
166 783s has no in1 so that in[2-6] are compatible with the 781d/782d.
167
168 783s pin is programmable for -5V or temp1; defaults to -5V,
169 no control in driver so temp1 doesn't work.
170
171 782d and 783s datasheets differ on which is pwm1 and which is pwm2.
172 We chose to follow 782d.
173
174 782d and 783s pin is programmable for fan3 input or pwm2 output;
175 defaults to fan3 input.
176 If pwm2 is enabled (with echo 255 1 > pwm2), then
177 fan3 will report 0.
178
179 782d has pwm1-2 for ISA, pwm1-4 for i2c. (pwm3-4 share pins with
180 the ISA pins)
181
182Data sheet updates:
183------------------
184 - PWM clock registers:
185
186 000: master / 512
187 001: master / 1024
188 010: master / 2048
189 011: master / 4096
190 100: master / 8192
191
192
193Answers from Winbond tech support
194---------------------------------
195>
196> 1) In the W83781D data sheet section 7.2 last paragraph, it talks about
197> reprogramming the R-T table if the Beta of the thermistor is not
198> 3435K. The R-T table is described briefly in section 8.20.
199> What formulas do I use to program a new R-T table for a given Beta?
200>
201 We are sorry that the calculation for R-T table value is
202confidential. If you have another Beta value of thermistor, we can help
203to calculate the R-T table for you. But you should give us real R-T
204Table which can be gotten by thermistor vendor. Therefore we will calculate
205them and obtain 32-byte data, and you can fill the 32-byte data to the
206register in Bank0.CR51 of W83781D.
207
208
209> 2) In the W83782D data sheet, it mentions that pins 38, 39, and 40 are
210> programmable to be either thermistor or Pentium II diode inputs.
211> How do I program them for diode inputs? I can't find any register
212> to program these to be diode inputs.
213 --> You may program Bank0 CR[5Dh] and CR[59h] registers.
214
215 CR[5Dh] bit 1(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
216
217 thermistor 0 0 0
218 diode 1 1 1
219
220
221(error) CR[59h] bit 4(VTIN1) bit 2(VTIN2) bit 3(VTIN3)
222(right) CR[59h] bit 4(VTIN1) bit 5(VTIN2) bit 6(VTIN3)
223
224 PII thermal diode 1 1 1
225 2N3904 diode 0 0 0
226
227
228Asus Clones
229-----------
230
231We have no datasheets for the Asus clones (AS99127F and ASB100 Bach).
232Here are some very useful information that were given to us by Alex Van
233Kaam about how to detect these chips, and how to read their values. He
234also gives advice for another Asus chipset, the Mozart-2 (which we
235don't support yet). Thanks Alex!
236I reworded some parts and added personal comments.
237
238# Detection:
239
240AS99127F rev.1, AS99127F rev.2 and ASB100:
241- I2C address range: 0x29 - 0x2F
242- If register 0x58 holds 0x31 then we have an Asus (either ASB100 or
243 AS99127F)
244- Which one depends on register 0x4F (manufacturer ID):
245 0x06 or 0x94: ASB100
246 0x12 or 0xC3: AS99127F rev.1
247 0x5C or 0xA3: AS99127F rev.2
248 Note that 0x5CA3 is Winbond's ID (WEC), which let us think Asus get their
249 AS99127F rev.2 direct from Winbond. The other codes mean ATT and DVC,
250 respectively. ATT could stand for Asustek something (although it would be
251 very badly chosen IMHO), I don't know what DVC could stand for. Maybe
252 these codes simply aren't meant to be decoded that way.
253
254Mozart-2:
255- I2C address: 0x77
256- If register 0x58 holds 0x56 or 0x10 then we have a Mozart-2
257- Of the Mozart there are 3 types:
258 0x58=0x56, 0x4E=0x94, 0x4F=0x36: Asus ASM58 Mozart-2
259 0x58=0x56, 0x4E=0x94, 0x4F=0x06: Asus AS2K129R Mozart-2
260 0x58=0x10, 0x4E=0x5C, 0x4F=0xA3: Asus ??? Mozart-2
261 You can handle all 3 the exact same way :)
262
263# Temperature sensors:
264
265ASB100:
266- sensor 1: register 0x27
267- sensor 2 & 3 are the 2 LM75's on the SMBus
268- sensor 4: register 0x17
269Remark: I noticed that on Intel boards sensor 2 is used for the CPU
270 and 4 is ignored/stuck, on AMD boards sensor 4 is the CPU and sensor 2 is
271 either ignored or a socket temperature.
272
273AS99127F (rev.1 and 2 alike):
274- sensor 1: register 0x27
275- sensor 2 & 3 are the 2 LM75's on the SMBus
276Remark: Register 0x5b is suspected to be temperature type selector. Bit 1
277 would control temp1, bit 3 temp2 and bit 5 temp3.
278
279Mozart-2:
280- sensor 1: register 0x27
281- sensor 2: register 0x13
282
283# Fan sensors:
284
285ASB100, AS99127F (rev.1 and 2 alike):
286- 3 fans, identical to the W83781D
287
288Mozart-2:
289- 2 fans only, 1350000/RPM/div
290- fan 1: register 0x28, divisor on register 0xA1 (bits 4-5)
291- fan 2: register 0x29, divisor on register 0xA1 (bits 6-7)
292
293# Voltages:
294
295This is where there is a difference between AS99127F rev.1 and 2.
296Remark: The difference is similar to the difference between
297 W83781D and W83782D.
298
299ASB100:
300in0=r(0x20)*0.016
301in1=r(0x21)*0.016
302in2=r(0x22)*0.016
303in3=r(0x23)*0.016*1.68
304in4=r(0x24)*0.016*3.8
305in5=r(0x25)*(-0.016)*3.97
306in6=r(0x26)*(-0.016)*1.666
307
308AS99127F rev.1:
309in0=r(0x20)*0.016
310in1=r(0x21)*0.016
311in2=r(0x22)*0.016
312in3=r(0x23)*0.016*1.68
313in4=r(0x24)*0.016*3.8
314in5=r(0x25)*(-0.016)*3.97
315in6=r(0x26)*(-0.016)*1.503
316
317AS99127F rev.2:
318in0=r(0x20)*0.016
319in1=r(0x21)*0.016
320in2=r(0x22)*0.016
321in3=r(0x23)*0.016*1.68
322in4=r(0x24)*0.016*3.8
323in5=(r(0x25)*0.016-3.6)*5.14+3.6
324in6=(r(0x26)*0.016-3.6)*3.14+3.6
325
326Mozart-2:
327in0=r(0x20)*0.016
328in1=255
329in2=r(0x22)*0.016
330in3=r(0x23)*0.016*1.68
331in4=r(0x24)*0.016*4
332in5=255
333in6=255
334
335
336# PWM
337
338Additional info about PWM on the AS99127F (may apply to other Asus
339chips as well) by Jean Delvare as of 2004-04-09:
340
341AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
342and a temperature sensor type selector at 0x5B (which basically means
343that they swapped registers 0x59 and 0x5B when you compare with Winbond
344chips).
345Revision 1 of the chip also has the temperature sensor type selector at
3460x5B, but PWM registers have no effect.
347
348We don't know exactly how the temperature sensor type selection works.
349Looks like bits 1-0 are for temp1, bits 3-2 for temp2 and bits 5-4 for
350temp3, although it is possible that only the most significant bit matters
351each time. So far, values other than 0 always broke the readings.
352
353PWM registers seem to be split in two parts: bit 7 is a mode selector,
354while the other bits seem to define a value or threshold.
355
356When bit 7 is clear, bits 6-0 seem to hold a threshold value. If the value
357is below a given limit, the fan runs at low speed. If the value is above
358the limit, the fan runs at full speed. We have no clue as to what the limit
359represents. Note that there seem to be some inertia in this mode, speed
360changes may need some time to trigger. Also, an hysteresis mechanism is
361suspected since walking through all the values increasingly and then
362decreasingly led to slightly different limits.
363
364When bit 7 is set, bits 3-0 seem to hold a threshold value, while bits 6-4
365would not be significant. If the value is below a given limit, the fan runs
366at full speed, while if it is above the limit it runs at low speed (so this
367is the contrary of the other mode, in a way). Here again, we don't know
368what the limit is supposed to represent.
369
370One remarkable thing is that the fans would only have two or three
371different speeds (transitional states left apart), not a whole range as
372you usually get with PWM.
373
374As a conclusion, you can write 0x00 or 0x8F to the PWM registers to make
375fans run at low speed, and 0x7F or 0x80 to make them run at full speed.
376
377Please contact us if you can figure out how it is supposed to work. As
378long as we don't know more, the w83781d driver doesn't handle PWM on
379AS99127F chips at all.
380
381Additional info about PWM on the AS99127F rev.1 by Hector Martin:
382
383I've been fiddling around with the (in)famous 0x59 register and
384found out the following values do work as a form of coarse pwm:
385
3860x80 - seems to turn fans off after some time(1-2 minutes)... might be
387some form of auto-fan-control based on temp? hmm (Qfan? this mobo is an
388old ASUS, it isn't marketed as Qfan. Maybe some beta pre-attemp at Qfan
389that was dropped at the BIOS)
3900x81 - off
3910x82 - slightly "on-ner" than off, but my fans do not get to move. I can
392hear the high-pitched PWM sound that motors give off at too-low-pwm.
3930x83 - now they do move. Estimate about 70% speed or so.
3940x84-0x8f - full on
395
396Changing the high nibble doesn't seem to do much except the high bit
397(0x80) must be set for PWM to work, else the current pwm doesn't seem to
398change.
399
400My mobo is an ASUS A7V266-E. This behavior is similar to what I got
401with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
402remember the exact value) would be 70% and higher would be full on.
diff --git a/Documentation/hwmon/w83l785ts b/Documentation/hwmon/w83l785ts
new file mode 100644
index 000000000000..1841cedc25b2
--- /dev/null
+++ b/Documentation/hwmon/w83l785ts
@@ -0,0 +1,39 @@
1Kernel driver w83l785ts
2=======================
3
4Supported chips:
5 * Winbond W83L785TS-S
6 Prefix: 'w83l785ts'
7 Addresses scanned: I2C 0x2e
8 Datasheet: Publicly available at the Winbond USA website
9 http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83L785TS-S.pdf
10
11Authors:
12 Jean Delvare <khali@linux-fr.org>
13
14Description
15-----------
16
17The W83L785TS-S is a digital temperature sensor. It senses the
18temperature of a single external diode. The high limit is
19theoretically defined as 85 or 100 degrees C through a combination
20of external resistors, so the user cannot change it. Values seen so
21far suggest that the two possible limits are actually 95 and 110
22degrees C. The datasheet is rather poor and obviously inaccurate
23on several points including this one.
24
25All temperature values are given in degrees Celsius. Resolution
26is 1.0 degree. See the datasheet for details.
27
28The w83l785ts driver will not update its values more frequently than
29every other second; reading them more often will do no harm, but will
30return 'old' values.
31
32Known Issues
33------------
34
35On some systems (Asus), the BIOS is known to interfere with the driver
36and cause read errors. The driver will retry a given number of times
37(5 by default) and then give up, returning the old value (or 0 if
38there is no old value). It seems to work well enough so that you should
39not notice anything. Thanks to James Bolt for helping test this feature.