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authorLinus Torvalds <torvalds@linux-foundation.org>2012-01-16 15:07:46 -0800
committerLinus Torvalds <torvalds@linux-foundation.org>2012-01-16 15:07:46 -0800
commitadfeb6e9f46ded31b46fe406ad0dd6a9b4e0f7fe (patch)
tree244eeecd2f0ecce8b84ab1301824168f1651d632 /Documentation
parent97740400bc76b64781d01f8cdfbcf750582006ef (diff)
parent5f8b1f877e0212bfde8cb950725391f4a50c9396 (diff)
downloadlinux-linaro-stable-adfeb6e9f46ded31b46fe406ad0dd6a9b4e0f7fe.tar.gz
Merge branch 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging
* 'hwmon-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging: hwmon: (sysfs-interface) Update tempX_type attribute to be more generic hwmon: (adm1031) Fix coding style issues hwmon: (it87) Add IT8728F support hwmon: (coretemp) Add missing section annotations hwmon: (lm90) Add range check to set_update_interval hwmon: (lm63) Support extended lookup table of LM96163 hwmon: (lm63) Expose automatic fan speed control lookup table hwmon: (lm63) Fix incorrect comment about I2C address hwmon: (lm63) LM64 has a dedicated pin for tachometer hwmon: (lm63) Add sensor type attribute for external sensor on LM96163 hwmon: (lm63) Add support for update_interval sysfs attribute hwmon: (lm63) Add support for writing the external critical temperature hwmon: (lm63) Add support for unsigned upper temperature limits hwmon: (lm63) Add support for LM96163 hwmon: (lm63) Add support for external temperature offset register hwmon: (lm63) Fix checkpatch errors hwmon: (max1111) Change sysfs interface to in[0-3]_input in millivolts
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/hwmon/it8713
-rw-r--r--Documentation/hwmon/lm6321
-rw-r--r--Documentation/hwmon/sysfs-interface2
3 files changed, 28 insertions, 8 deletions
diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87
index 6f496a586732..23b7def21ba8 100644
--- a/Documentation/hwmon/it87
+++ b/Documentation/hwmon/it87
@@ -26,6 +26,10 @@ Supported chips:
Prefix: 'it8721'
Addresses scanned: from Super I/O config space (8 I/O ports)
Datasheet: Not publicly available
+ * IT8728F
+ Prefix: 'it8728'
+ Addresses scanned: from Super I/O config space (8 I/O ports)
+ Datasheet: Not publicly available
* SiS950 [clone of IT8705F]
Prefix: 'it87'
Addresses scanned: from Super I/O config space (8 I/O ports)
@@ -71,7 +75,7 @@ Description
-----------
This driver implements support for the IT8705F, IT8712F, IT8716F,
-IT8718F, IT8720F, IT8721F, IT8726F, IT8758E and SiS950 chips.
+IT8718F, IT8720F, IT8721F, IT8726F, IT8728F, IT8758E and SiS950 chips.
These chips are 'Super I/O chips', supporting floppy disks, infrared ports,
joysticks and other miscellaneous stuff. For hardware monitoring, they
@@ -105,6 +109,9 @@ The IT8726F is just bit enhanced IT8716F with additional hardware
for AMD power sequencing. Therefore the chip will appear as IT8716F
to userspace applications.
+The IT8728F is considered compatible with the IT8721F, until a datasheet
+becomes available (hopefully.)
+
Temperatures are measured in degrees Celsius. An alarm is triggered once
when the Overtemperature Shutdown limit is crossed.
@@ -121,8 +128,8 @@ alarm is triggered if the voltage has crossed a programmable minimum or
maximum limit. Note that minimum in this case always means 'closest to
zero'; this is important for negative voltage measurements. All voltage
inputs can measure voltages between 0 and 4.08 volts, with a resolution of
-0.016 volt (except IT8721F/IT8758E: 0.012 volt.) The battery voltage in8 does
-not have limit registers.
+0.016 volt (except IT8721F/IT8758E and IT8728F: 0.012 volt.) The battery
+voltage in8 does not have limit registers.
On the IT8721F/IT8758E, some voltage inputs are internal and scaled inside
the chip (in7, in8 and optionally in3). The driver handles this transparently
diff --git a/Documentation/hwmon/lm63 b/Documentation/hwmon/lm63
index b9843eab1afb..4d30d209881a 100644
--- a/Documentation/hwmon/lm63
+++ b/Documentation/hwmon/lm63
@@ -12,6 +12,11 @@ Supported chips:
Addresses scanned: I2C 0x18 and 0x4e
Datasheet: Publicly available at the National Semiconductor website
http://www.national.com/pf/LM/LM64.html
+ * National Semiconductor LM96163
+ Prefix: 'lm96163'
+ Addresses scanned: I2C 0x4c
+ Datasheet: Publicly available at the National Semiconductor website
+ http://www.national.com/pf/LM/LM96163.html
Author: Jean Delvare <khali@linux-fr.org>
@@ -49,16 +54,24 @@ value for measuring the speed of the fan. It can measure fan speeds down to
Note that the pin used for fan monitoring is shared with an alert out
function. Depending on how the board designer wanted to use the chip, fan
speed monitoring will or will not be possible. The proper chip configuration
-is left to the BIOS, and the driver will blindly trust it.
+is left to the BIOS, and the driver will blindly trust it. Only the original
+LM63 suffers from this limitation, the LM64 and LM96163 have separate pins
+for fan monitoring and alert out. On the LM64, monitoring is always enabled;
+on the LM96163 it can be disabled.
A PWM output can be used to control the speed of the fan. The LM63 has two
PWM modes: manual and automatic. Automatic mode is not fully implemented yet
(you cannot define your custom PWM/temperature curve), and mode change isn't
supported either.
-The lm63 driver will not update its values more frequently than every
-second; reading them more often will do no harm, but will return 'old'
-values.
+The lm63 driver will not update its values more frequently than configured with
+the update_interval sysfs attribute; reading them more often will do no harm,
+but will return 'old' values. Values in the automatic fan control lookup table
+(attributes pwm1_auto_*) have their own independent lifetime of 5 seconds.
The LM64 is effectively an LM63 with GPIO lines. The driver does not
support these GPIO lines at present.
+
+The LM96163 is an enhanced version of LM63 with improved temperature accuracy
+and better PWM resolution. For LM96163, the external temperature sensor type is
+configurable as CPU embedded diode(1) or 3904 transistor(2).
diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
index a4aa8f600e09..1f4dd855a299 100644
--- a/Documentation/hwmon/sysfs-interface
+++ b/Documentation/hwmon/sysfs-interface
@@ -304,7 +304,7 @@ value (fastest fan speed) wins.
temp[1-*]_type Sensor type selection.
Integers 1 to 6
RW
- 1: PII/Celeron Diode
+ 1: CPU embedded diode
2: 3904 transistor
3: thermal diode
4: thermistor