10 files changed, 182 insertions, 52 deletions

diff --git a/Documentation/hwmon/adt7470 b/Documentation/hwmon/adt7470
new file mode 100644
index 000000000000..75d13ca147cc
--- /dev/null
+++ b/Documentation/hwmon/adt7470
@@ -0,0 +1,76 @@
+Kernel driver adt7470
+=====================
+
+Supported chips:
+  * Analog Devices ADT7470
+    Prefix: 'adt7470'
+    Addresses scanned: I2C 0x2C, 0x2E, 0x2F
+    Datasheet: Publicly available at the Analog Devices website
+
+Author: Darrick J. Wong
+
+Description
+-----------
+
+This driver implements support for the Analog Devices ADT7470 chip.  There may
+be other chips that implement this interface.
+
+The ADT7470 uses the 2-wire interface compatible with the SMBus 2.0
+specification. Using an analog to digital converter it measures up to ten (10)
+external temperatures. It has four (4) 16-bit counters for measuring fan speed.
+There are four (4) PWM outputs that can be used to control fan speed.
+
+A sophisticated control system for the PWM outputs is designed into the ADT7470
+that allows fan speed to be adjusted automatically based on any of the ten
+temperature sensors. Each PWM output is individually adjustable and
+programmable. Once configured, the ADT7470 will adjust the PWM outputs in
+response to the measured temperatures with further host intervention.  This
+feature can also be disabled for manual control of the PWM's.
+
+Each of the measured inputs (temperature, fan speed) has corresponding high/low
+limit values. The ADT7470 will signal an ALARM if any measured value exceeds
+either limit.
+
+The ADT7470 DOES NOT sample all inputs continuously.  A single pin on the
+ADT7470 is connected to a multitude of thermal diodes, but the chip must be
+instructed explicitly to read the multitude of diodes.  If you want to use
+automatic fan control mode, you must manually read any of the temperature
+sensors or the fan control algorithm will not run.  The chip WILL NOT DO THIS
+AUTOMATICALLY; this must be done from userspace.  This may be a bug in the chip
+design, given that many other AD chips take care of this.  The driver will not
+read the registers more often than once every 5 seconds.  Further,
+configuration data is only read once per minute.
+
+Special Features
+----------------
+
+The ADT7470 has a 8-bit ADC and is capable of measuring temperatures with 1
+degC resolution.
+
+The Analog Devices datasheet is very detailed and describes a procedure for
+determining an optimal configuration for the automatic PWM control.
+
+Configuration Notes
+-------------------
+
+Besides standard interfaces driver adds the following:
+
+* PWM Control
+
+* pwm#_auto_point1_pwm and pwm#_auto_point1_temp and
+* pwm#_auto_point2_pwm and pwm#_auto_point2_temp -
+
+point1: Set the pwm speed at a lower temperature bound.
+point2: Set the pwm speed at a higher temperature bound.
+
+The ADT7470 will scale the pwm between the lower and higher pwm speed when
+the temperature is between the two temperature boundaries.  PWM values range
+from 0 (off) to 255 (full speed).  Fan speed will be set to maximum when the
+temperature sensor associated with the PWM control exceeds
+pwm#_auto_point2_temp.
+
+Notes
+-----
+
+As stated above, the temperature inputs must be read periodically from
+userspace in order for the automatic pwm algorithm to run.
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 3496b7020e7c..042c0415140b 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -136,10 +136,10 @@ once-only alarms.
 The IT87xx only updates its values each 1.5 seconds; reading it more often
 will do no harm, but will return 'old' values.
 
-To change sensor N to a thermistor, 'echo 2 > tempN_type' where N is 1, 2,
+To change sensor N to a thermistor, 'echo 4 > tempN_type' where N is 1, 2,
 or 3. To change sensor N to a thermal diode, 'echo 3 > tempN_type'.
 Give 0 for unused sensor. Any other value is invalid. To configure this at
-startup, consult lm_sensors's /etc/sensors.conf. (2 = thermistor;
+startup, consult lm_sensors's /etc/sensors.conf. (4 = thermistor;
 3 = thermal diode)
 
 
diff --git a/Documentation/hwmon/lm85 b/Documentation/hwmon/lm85
index 6d41db7f17f8..400620741290 100644
--- a/Documentation/hwmon/lm85
+++ b/Documentation/hwmon/lm85
@@ -163,16 +163,6 @@ configured individually according to the following options.
 * pwm#_auto_pwm_min - this specifies the PWM value for temp#_auto_temp_off
                       temperature. (PWM value from 0 to 255)
 
-* pwm#_auto_pwm_freq - select base frequency of PWM output. You can select
-                       in range of 10.0 to 94.0 Hz in .1 Hz units.
-                       (Values 100 to 940).
-
-The pwm#_auto_pwm_freq can be set to one of the following 8 values. Setting the
-frequency to a value not on this list, will result in the next higher frequency
-being selected. The actual device frequency may vary slightly from this
-specification as designed by the manufacturer. Consult the datasheet for more
-details. (PWM Frequency values:  100, 150, 230, 300, 380, 470, 620, 940)
-
 * pwm#_auto_pwm_minctl - this flags selects for temp#_auto_temp_off temperature
                          the bahaviour of fans. Write 1 to let fans spinning at
                          pwm#_auto_pwm_min or write 0 to let them off.
diff --git a/Documentation/hwmon/lm87 b/Documentation/hwmon/lm87
index ec27aa1b94cb..6b47b67fd968 100644
--- a/Documentation/hwmon/lm87
+++ b/Documentation/hwmon/lm87
@@ -65,11 +65,10 @@ The LM87 has four pins which can serve one of two possible functions,
 depending on the hardware configuration.
 
 Some functions share pins, so not all functions are available at the same
-time. Which are depends on the hardware setup. This driver assumes that
-the BIOS configured the chip correctly. In that respect, it differs from
-the original driver (from lm_sensors for Linux 2.4), which would force the
-LM87 to an arbitrary, compile-time chosen mode, regardless of the actual
-chipset wiring.
+time. Which are depends on the hardware setup. This driver normally
+assumes that firmware configured the chip correctly. Where this is not
+the case, platform code must set the I2C client's platform_data to point
+to a u8 value to be written to the channel register.
 
 For reference, here is the list of exclusive functions:
  - in0+in5 (default) or temp3
diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90
index aa4a0ec20081..e0d5206d1de3 100644
--- a/Documentation/hwmon/lm90
+++ b/Documentation/hwmon/lm90
@@ -11,7 +11,7 @@ Supported chips:
     Prefix: 'lm99'
     Addresses scanned: I2C 0x4c and 0x4d
     Datasheet: Publicly available at the National Semiconductor website
-               http://www.national.com/pf/LM/LM89.html
+               http://www.national.com/mpf/LM/LM89.html
   * National Semiconductor LM99
     Prefix: 'lm99'
     Addresses scanned: I2C 0x4c and 0x4d
@@ -21,18 +21,32 @@ Supported chips:
     Prefix: 'lm86'
     Addresses scanned: I2C 0x4c
     Datasheet: Publicly available at the National Semiconductor website
-               http://www.national.com/pf/LM/LM86.html
+               http://www.national.com/mpf/LM/LM86.html
   * Analog Devices ADM1032
     Prefix: 'adm1032'
     Addresses scanned: I2C 0x4c and 0x4d
-    Datasheet: Publicly available at the Analog Devices website
-               http://www.analog.com/en/prod/0,2877,ADM1032,00.html
+    Datasheet: Publicly available at the ON Semiconductor website
+               http://www.onsemi.com/PowerSolutions/product.do?id=ADM1032
   * Analog Devices ADT7461
     Prefix: 'adt7461'
     Addresses scanned: I2C 0x4c and 0x4d
-    Datasheet: Publicly available at the Analog Devices website
-               http://www.analog.com/en/prod/0,2877,ADT7461,00.html
-    Note: Only if in ADM1032 compatibility mode
+    Datasheet: Publicly available at the ON Semiconductor website
+               http://www.onsemi.com/PowerSolutions/product.do?id=ADT7461
+  * Maxim MAX6646
+    Prefix: 'max6646'
+    Addresses scanned: I2C 0x4d
+    Datasheet: Publicly available at the Maxim website
+               http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497
+  * Maxim MAX6647
+    Prefix: 'max6646'
+    Addresses scanned: I2C 0x4e
+    Datasheet: Publicly available at the Maxim website
+               http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497
+  * Maxim MAX6649
+    Prefix: 'max6646'
+    Addresses scanned: I2C 0x4c
+    Datasheet: Publicly available at the Maxim website
+               http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3497
   * Maxim MAX6657
     Prefix: 'max6657'
     Addresses scanned: I2C 0x4c
@@ -70,25 +84,21 @@ Description
 
 The LM90 is a digital temperature sensor. It senses its own temperature as
 well as the temperature of up to one external diode. It is compatible
-with many other devices such as the LM86, the LM89, the LM99, the ADM1032,
-the MAX6657, MAX6658, MAX6659, MAX6680 and the MAX6681 all of which are
-supported by this driver.
+with many other devices, many of which are supported by this driver.
 
 Note that there is no easy way to differentiate between the MAX6657,
 MAX6658 and MAX6659 variants. The extra address and features of the
 MAX6659 are not supported by this driver. The MAX6680 and MAX6681 only
 differ in their pinout, therefore they obviously can't (and don't need to)
-be distinguished. Additionally, the ADT7461 is supported if found in
-ADM1032 compatibility mode.
+be distinguished.
 
 The specificity of this family of chipsets over the ADM1021/LM84
 family is that it features critical limits with hysteresis, and an
 increased resolution of the remote temperature measurement.
 
 The different chipsets of the family are not strictly identical, although
-very similar. This driver doesn't handle any specific feature for now,
-with the exception of SMBus PEC. For reference, here comes a non-exhaustive
-list of specific features:
+very similar. For reference, here comes a non-exhaustive list of specific
+features:
 
 LM90:
   * Filter and alert configuration register at 0xBF.
@@ -114,9 +124,11 @@ ADT7461:
   * Lower resolution for remote temperature
 
 MAX6657 and MAX6658:
+  * Better local resolution
   * Remote sensor type selection
 
 MAX6659:
+  * Better local resolution
   * Selectable address
   * Second critical temperature limit
   * Remote sensor type selection
@@ -127,7 +139,8 @@ MAX6680 and MAX6681:
 
 All temperature values are given in degrees Celsius. Resolution
 is 1.0 degree for the local temperature, 0.125 degree for the remote
-temperature.
+temperature, except for the MAX6657, MAX6658 and MAX6659 which have a
+resolution of 0.125 degree for both temperatures.
 
 Each sensor has its own high and low limits, plus a critical limit.
 Additionally, there is a relative hysteresis value common to both critical
diff --git a/Documentation/hwmon/pc87360 b/Documentation/hwmon/pc87360
index 89a8fcfa78df..cbac32b59c8c 100644
--- a/Documentation/hwmon/pc87360
+++ b/Documentation/hwmon/pc87360
@@ -5,12 +5,7 @@ Supported chips:
   * National Semiconductor PC87360, PC87363, PC87364, PC87365 and PC87366
     Prefixes: 'pc87360', 'pc87363', 'pc87364', 'pc87365', 'pc87366'
     Addresses scanned: none, address read from Super I/O config space
-    Datasheets:
-        http://www.national.com/pf/PC/PC87360.html
-        http://www.national.com/pf/PC/PC87363.html
-        http://www.national.com/pf/PC/PC87364.html
-        http://www.national.com/pf/PC/PC87365.html
-        http://www.national.com/pf/PC/PC87366.html
+    Datasheets: No longer available
 
 Authors: Jean Delvare <khali@linux-fr.org>
 
diff --git a/Documentation/hwmon/pc87427 b/Documentation/hwmon/pc87427
index 9a0708f9f49e..d1ebbe510f35 100644
--- a/Documentation/hwmon/pc87427
+++ b/Documentation/hwmon/pc87427
@@ -5,7 +5,7 @@ Supported chips:
   * National Semiconductor PC87427
     Prefix: 'pc87427'
     Addresses scanned: none, address read from Super I/O config space
-    Datasheet: http://www.winbond.com.tw/E-WINBONDHTM/partner/apc_007.html
+    Datasheet: No longer available
 
 Author: Jean Delvare <khali@linux-fr.org>
 
diff --git a/Documentation/hwmon/w83781d b/Documentation/hwmon/w83781d
index 6f800a0283e9..c91e0b63ea1d 100644
--- a/Documentation/hwmon/w83781d
+++ b/Documentation/hwmon/w83781d
@@ -353,7 +353,7 @@ in6=255
 
 # PWM
 
-Additional info about PWM on the AS99127F (may apply to other Asus
+* Additional info about PWM on the AS99127F (may apply to other Asus
 chips as well) by Jean Delvare as of 2004-04-09:
 
 AS99127F revision 2 seems to have two PWM registers at 0x59 and 0x5A,
@@ -396,7 +396,7 @@ Please contact us if you can figure out how it is supposed to work. As
 long as we don't know more, the w83781d driver doesn't handle PWM on
 AS99127F chips at all.
 
-Additional info about PWM on the AS99127F rev.1 by Hector Martin:
+* Additional info about PWM on the AS99127F rev.1 by Hector Martin:
 
 I've been fiddling around with the (in)famous 0x59 register and
 found out the following values do work as a form of coarse pwm:
@@ -418,3 +418,36 @@ change.
 My mobo is an ASUS A7V266-E. This behavior is similar to what I got
 with speedfan under Windows, where 0-15% would be off, 15-2x% (can't
 remember the exact value) would be 70% and higher would be full on.
+
+* Additional info about PWM on the AS99127F rev.1 from lm-sensors
+  ticket #2350:
+
+I conducted some experiment on Asus P3B-F motherboard with AS99127F
+(Ver. 1).
+
+I confirm that 0x59 register control the CPU_Fan Header on this
+motherboard, and 0x5a register control PWR_Fan.
+
+In order to reduce the dependency of specific fan, the measurement is
+conducted with a digital scope without fan connected. I found out that
+P3B-F actually output variable DC voltage on fan header center pin,
+looks like PWM is filtered on this motherboard.
+
+Here are some of measurements:
+
+0x80     20 mV
+0x81     20 mV
+0x82    232 mV
+0x83   1.2  V
+0x84   2.31 V
+0x85   3.44 V
+0x86   4.62 V
+0x87   5.81 V
+0x88   7.01 V
+9x89   8.22 V
+0x8a   9.42 V
+0x8b  10.6  V
+0x8c  11.9  V
+0x8d  12.4  V
+0x8e  12.4  V
+0x8f  12.4  V
diff --git a/Documentation/hwmon/w83791d b/Documentation/hwmon/w83791d
index a67d3b7a7098..5663e491655c 100644
--- a/Documentation/hwmon/w83791d
+++ b/Documentation/hwmon/w83791d
@@ -58,29 +58,35 @@ internal state that allows no clean access (Bank with ID register is not
 currently selected). If you know the address of the chip, use a 'force'
 parameter; this will put it into a more well-behaved state first.
 
-The driver implements three temperature sensors, five fan rotation speed
-sensors, and ten voltage sensors.
+The driver implements three temperature sensors, ten voltage sensors,
+five fan rotation speed sensors and manual PWM control of each fan.
 
 Temperatures are measured in degrees Celsius and measurement resolution is 1
 degC for temp1 and 0.5 degC for temp2 and temp3. An alarm is triggered when
 the temperature gets higher than the Overtemperature Shutdown value; it stays
 on until the temperature falls below the Hysteresis value.
 
+Voltage sensors (also known as IN sensors) report their values in millivolts.
+An alarm is triggered if the voltage has crossed a programmable minimum
+or maximum limit.
+
 Fan rotation speeds are reported in RPM (rotations per minute). An alarm is
 triggered if the rotation speed has dropped below a programmable limit. Fan
 readings can be divided by a programmable divider (1, 2, 4, 8, 16,
 32, 64 or 128 for all fans) to give the readings more range or accuracy.
 
-Voltage sensors (also known as IN sensors) report their values in millivolts.
-An alarm is triggered if the voltage has crossed a programmable minimum
-or maximum limit.
+Each fan controlled is controlled by PWM. The PWM duty cycle can be read and
+set for each fan separately. Valid values range from 0 (stop) to 255 (full).
+PWM 1-3 support Thermal Cruise mode, in which the PWMs are automatically
+regulated to keep respectively temp 1-3 at a certain target temperature.
+See below for the description of the sysfs-interface.
 
 The w83791d has a global bit used to enable beeping from the speaker when an
 alarm is triggered as well as a bitmask to enable or disable the beep for
 specific alarms. You need both the global beep enable bit and the
 corresponding beep bit to be on for a triggered alarm to sound a beep.
 
-The sysfs interface to the gloabal enable is via the sysfs beep_enable file.
+The sysfs interface to the global enable is via the sysfs beep_enable file.
 This file is used for both legacy and new code.
 
 The sysfs interface to the beep bitmask has migrated from the original legacy
@@ -105,6 +111,27 @@ going forward.
 The driver reads the hardware chip values at most once every three seconds.
 User mode code requesting values more often will receive cached values.
 
+/sys files
+----------
+The sysfs-interface is documented in the 'sysfs-interface' file. Only
+chip-specific options are documented here.
+
+pwm[1-3]_enable -       this file controls mode of fan/temperature control for
+                        fan 1-3. Fan/PWM 4-5 only support manual mode.
+                            * 1 Manual mode
+                            * 2 Thermal Cruise mode
+                            * 3 Fan Speed Cruise mode (no further support)
+
+temp[1-3]_target -      defines the target temperature for Thermal Cruise mode.
+                        Unit: millidegree Celsius
+                        RW
+
+temp[1-3]_tolerance -   temperature tolerance for Thermal Cruise mode.
+                        Specifies an interval around the target temperature
+                        in which the fan speed is not changed.
+                        Unit: millidegree Celsius
+                        RW
+
 Alarms bitmap vs. beep_mask bitmask
 ------------------------------------
 For legacy code using the alarms and beep_mask files:
@@ -132,7 +159,3 @@ tart2        :  alarms: 0x020000 beep_mask: 0x080000 <== mismatch
 tart3        :  alarms: 0x040000 beep_mask: 0x100000 <== mismatch
 case_open    :  alarms: 0x001000 beep_mask: 0x001000
 global_enable:  alarms: -------- beep_mask: 0x800000 (modified via beep_enable)
-
-W83791D TODO:
----------------
-Provide a patch for smart-fan control (still need appropriate motherboard/fans)
diff --git a/Documentation/sysctl/kernel.txt b/Documentation/sysctl/kernel.txt
index e1ff0d920a5c..bde799e06598 100644
--- a/Documentation/sysctl/kernel.txt
+++ b/Documentation/sysctl/kernel.txt
@@ -369,4 +369,5 @@ can be ORed together:
   2 - A module was force loaded by insmod -f.
       Set by modutils >= 2.4.9 and module-init-tools.
   4 - Unsafe SMP processors: SMP with CPUs not designed for SMP.
+ 64 - A module from drivers/staging was loaded.