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authorLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-21 19:37:42 -0500
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-21 19:37:42 -0500
commitbfe38ccf8d0b541f387f65267f6f3794be59233a (patch)
treec1f5cece3247431b3d2c484da831d2eb0fd6c9e0 /Documentation
parent20f8d2a49360980f1dc0afe2ea227e3ba887e575 (diff)
parent25e9c86d5a6d82ea45eb680fc66bf73ac5e50dff (diff)
Merge branch 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6
* 'release' of git://lm-sensors.org/kernel/mhoffman/hwmon-2.6: hwmon: normal_i2c arrays should be const hwmon: New driver for Analog Devices ADT7473 sensor chip hwmon: (coretemp) Add Penryn CPU to coretemp hwmon: (coretemp) Add TjMax detection for mobile CPUs hwmon: (applesmc) sensors set for MacBook2 hwmon: (thmc50) Storage class should be before const qualifier hwmon: (coretemp) fix section mismatch warning hwmon: (coretemp) Add maximum cooling temperature readout hwmon: (adm1026) Properly terminate sysfs groups hwmon: (vt8231) Update maintainer email address hwmon: (vt8231) Add individual alarm files hwmon: (via686a) Add individual alarm files hwmon: (smsc47m1) Add individual alarm files hwmon: (max1619) Add individual alarm and fault files hwmon: (lm92) Add individual alarm files
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/hwmon/adt747379
-rw-r--r--Documentation/hwmon/coretemp6
2 files changed, 83 insertions, 2 deletions
diff --git a/Documentation/hwmon/adt7473 b/Documentation/hwmon/adt7473
new file mode 100644
index 000000000000..22d8b19046ab
--- /dev/null
+++ b/Documentation/hwmon/adt7473
@@ -0,0 +1,79 @@
1Kernel driver adt7473
2======================
3
4Supported chips:
5 * Analog Devices ADT7473
6 Prefix: 'adt7473'
7 Addresses scanned: I2C 0x2C, 0x2D, 0x2E
8 Datasheet: Publicly available at the Analog Devices website
9
10Author: Darrick J. Wong
11
12Description
13-----------
14
15This driver implements support for the Analog Devices ADT7473 chip family.
16
17The LM85 uses the 2-wire interface compatible with the SMBUS 2.0
18specification. Using an analog to digital converter it measures three (3)
19temperatures and two (2) voltages. It has three (3) 16-bit counters for
20measuring fan speed. There are three (3) PWM outputs that can be used
21to control fan speed.
22
23A sophisticated control system for the PWM outputs is designed into the
24LM85 that allows fan speed to be adjusted automatically based on any of the
25three temperature sensors. Each PWM output is individually adjustable and
26programmable. Once configured, the ADT7473 will adjust the PWM outputs in
27response to the measured temperatures without further host intervention.
28This feature can also be disabled for manual control of the PWM's.
29
30Each of the measured inputs (voltage, temperature, fan speed) has
31corresponding high/low limit values. The ADT7473 will signal an ALARM if
32any measured value exceeds either limit.
33
34The ADT7473 samples all inputs continuously. The driver will not read
35the registers more often than once every other second. Further,
36configuration data is only read once per minute.
37
38Special Features
39----------------
40
41The ADT7473 have a 10-bit ADC and can therefore measure temperatures
42with 0.25 degC resolution. Temperature readings can be configured either
43for twos complement format or "Offset 64" format, wherein 63 is subtracted
44from the raw value to get the temperature value.
45
46The Analog Devices datasheet is very detailed and describes a procedure for
47determining an optimal configuration for the automatic PWM control.
48
49Hardware Configurations
50-----------------------
51
52The ADT7473 chips have an optional SMBALERT output that can be used to
53signal the chipset in case a limit is exceeded or the temperature sensors
54fail. Individual sensor interrupts can be masked so they won't trigger
55SMBALERT. The SMBALERT output if configured replaces the PWM2 function.
56
57Configuration Notes
58-------------------
59
60Besides standard interfaces driver adds the following:
61
62* PWM Control
63
64* pwm#_auto_point1_pwm and pwm#_auto_point1_temp and
65* pwm#_auto_point2_pwm and pwm#_auto_point2_temp -
66
67point1: Set the pwm speed at a lower temperature bound.
68point2: Set the pwm speed at a higher temperature bound.
69
70The ADT7473 will scale the pwm between the lower and higher pwm speed when
71the temperature is between the two temperature boundaries. PWM values range
72from 0 (off) to 255 (full speed).
73
74Notes
75-----
76
77The NVIDIA binary driver presents an ADT7473 chip via an on-card i2c bus.
78Unfortunately, they fail to set the i2c adapter class, so this driver may
79fail to find the chip until the nvidia driver is patched.
diff --git a/Documentation/hwmon/coretemp b/Documentation/hwmon/coretemp
index 170bf862437b..dbbe6c7025b0 100644
--- a/Documentation/hwmon/coretemp
+++ b/Documentation/hwmon/coretemp
@@ -4,9 +4,10 @@ Kernel driver coretemp
4Supported chips: 4Supported chips:
5 * All Intel Core family 5 * All Intel Core family
6 Prefix: 'coretemp' 6 Prefix: 'coretemp'
7 CPUID: family 0x6, models 0xe, 0xf, 0x16 7 CPUID: family 0x6, models 0xe, 0xf, 0x16, 0x17
8 Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual 8 Datasheet: Intel 64 and IA-32 Architectures Software Developer's Manual
9 Volume 3A: System Programming Guide 9 Volume 3A: System Programming Guide
10 http://softwarecommunity.intel.com/Wiki/Mobility/720.htm
10 11
11Author: Rudolf Marek 12Author: Rudolf Marek
12 13
@@ -25,7 +26,8 @@ may be raised, if the temperature grows enough (more than TjMax) to trigger
25the Out-Of-Spec bit. Following table summarizes the exported sysfs files: 26the Out-Of-Spec bit. Following table summarizes the exported sysfs files:
26 27
27temp1_input - Core temperature (in millidegrees Celsius). 28temp1_input - Core temperature (in millidegrees Celsius).
28temp1_crit - Maximum junction temperature (in millidegrees Celsius). 29temp1_max - All cooling devices should be turned on (on Core2).
30temp1_crit - Maximum junction temperature (in millidegrees Celsius).
29temp1_crit_alarm - Set when Out-of-spec bit is set, never clears. 31temp1_crit_alarm - Set when Out-of-spec bit is set, never clears.
30 Correct CPU operation is no longer guaranteed. 32 Correct CPU operation is no longer guaranteed.
31temp1_label - Contains string "Core X", where X is processor 33temp1_label - Contains string "Core X", where X is processor