summaryrefslogtreecommitdiff
path: root/Documentation
diff options
context:
space:
mode:
authorLinus Torvalds <torvalds@linux-foundation.org>2009-03-30 17:54:32 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2009-03-30 17:54:32 -0700
commit3c6fae67d026d57f64eb3da9c0d0e76983e39ae3 (patch)
treea11f2ff6d99b382fff02a643f6b6b204efb9c40e /Documentation
parentc4e1aa67ed9e4e542a064bc271ddbf152b677e91 (diff)
parentde15f093e666ccd542f6f7a0e3e917166a07ab44 (diff)
Merge branch 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6
* 'hwmon-for-linus' of git://jdelvare.pck.nerim.net/jdelvare-2.6: hwmon: (fschmd) Add support for the FSC Hades IC hwmon: (fschmd) Add support for the FSC Syleus IC i2c-i801: Instantiate FSC hardware montioring chips dmi: Let dmi_walk() users pass private data hwmon: Define a standard interface for chassis intrusion detection Move the pcf8591 driver to hwmon hwmon: (w83627ehf) Only expose in6 or temp3 on the W83667HG hwmon: (w83627ehf) Add support for W83667HG hwmon: (w83627ehf) Invert fan pin variables logic hwmon: (hdaps) Fix Thinkpad X41 axis inversion hwmon: (hdaps) Allow inversion of separate axis hwmon: (ds1621) Clean up documentation hwmon: (ds1621) Avoid unneeded register access hwmon: (ds1621) Clean up register access hwmon: (ds1621) Reorder code statements
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/hwmon/ds162151
-rw-r--r--Documentation/hwmon/pcf8591 (renamed from Documentation/i2c/chips/pcf8591)0
-rw-r--r--Documentation/hwmon/sysfs-interface22
-rw-r--r--Documentation/hwmon/w83627ehf29
4 files changed, 45 insertions, 57 deletions
diff --git a/Documentation/hwmon/ds1621 b/Documentation/hwmon/ds1621
index 1fee6f1e6bc..5e97f333c4d 100644
--- a/Documentation/hwmon/ds1621
+++ b/Documentation/hwmon/ds1621
@@ -49,12 +49,9 @@ of up to +/- 0.5 degrees even when compared against precise temperature
readings. Be sure to have a high vs. low temperature limit gap of al least
1.0 degree Celsius to avoid Tout "bouncing", though!
-As for alarms, you can read the alarm status of the DS1621 via the 'alarms'
-/sys file interface. The result consists mainly of bit 6 and 5 of the
-configuration register of the chip; bit 6 (0x40 or 64) is the high alarm
-bit and bit 5 (0x20 or 32) the low one. These bits are set when the high or
-low limits are met or exceeded and are reset by the module as soon as the
-respective temperature ranges are left.
+The alarm bits are set when the high or low limits are met or exceeded and
+are reset by the module as soon as the respective temperature ranges are
+left.
The alarm registers are in no way suitable to find out about the actual
status of Tout. They will only tell you about its history, whether or not
@@ -64,45 +61,3 @@ with neither of the alarms set.
Temperature conversion of the DS1621 takes up to 1000ms; internal access to
non-volatile registers may last for 10ms or below.
-
-High Accuracy Temperature Reading
----------------------------------
-
-As said before, the temperature issued via the 9-bit i2c-bus data is
-somewhat arbitrary. Internally, the temperature conversion is of a
-different kind that is explained (not so...) well in the DS1621 data sheet.
-To cut the long story short: Inside the DS1621 there are two oscillators,
-both of them biassed by a temperature coefficient.
-
-Higher resolution of the temperature reading can be achieved using the
-internal projection, which means taking account of REG_COUNT and REG_SLOPE
-(the driver manages them):
-
-Taken from Dallas Semiconductors App Note 068: 'Increasing Temperature
-Resolution on the DS1620' and App Note 105: 'High Resolution Temperature
-Measurement with Dallas Direct-to-Digital Temperature Sensors'
-
-- Read the 9-bit temperature and strip the LSB (Truncate the .5 degs)
-- The resulting value is TEMP_READ.
-- Then, read REG_COUNT.
-- And then, REG_SLOPE.
-
- TEMP = TEMP_READ - 0.25 + ((REG_SLOPE - REG_COUNT) / REG_SLOPE)
-
-Note that this is what the DONE bit in the DS1621 configuration register is
-good for: Internally, one temperature conversion takes up to 1000ms. Before
-that conversion is complete you will not be able to read valid things out
-of REG_COUNT and REG_SLOPE. The DONE bit, as you may have guessed by now,
-tells you whether the conversion is complete ("done", in plain English) and
-thus, whether the values you read are good or not.
-
-The DS1621 has two modes of operation: "Continuous" conversion, which can
-be understood as the default stand-alone mode where the chip gets the
-temperature and controls external devices via its Tout pin or tells other
-i2c's about it if they care. The other mode is called "1SHOT", that means
-that it only figures out about the temperature when it is explicitly told
-to do so; this can be seen as power saving mode.
-
-Now if you want to read REG_COUNT and REG_SLOPE, you have to either stop
-the continuous conversions until the contents of these registers are valid,
-or, in 1SHOT mode, you have to have one conversion made.
diff --git a/Documentation/i2c/chips/pcf8591 b/Documentation/hwmon/pcf8591
index 5628fcf4207..5628fcf4207 100644
--- a/Documentation/i2c/chips/pcf8591
+++ b/Documentation/hwmon/pcf8591
diff --git a/Documentation/hwmon/sysfs-interface b/Documentation/hwmon/sysfs-interface
index 6dbfd5efd99..2f10ce6a879 100644
--- a/Documentation/hwmon/sysfs-interface
+++ b/Documentation/hwmon/sysfs-interface
@@ -365,6 +365,7 @@ energy[1-*]_input Cumulative energy use
Unit: microJoule
RO
+
**********
* Alarms *
**********
@@ -453,6 +454,27 @@ beep_mask Bitmask for beep.
RW
+***********************
+* Intrusion detection *
+***********************
+
+intrusion[0-*]_alarm
+ Chassis intrusion detection
+ 0: OK
+ 1: intrusion detected
+ RW
+ Contrary to regular alarm flags which clear themselves
+ automatically when read, this one sticks until cleared by
+ the user. This is done by writing 0 to the file. Writing
+ other values is unsupported.
+
+intrusion[0-*]_beep
+ Chassis intrusion beep
+ 0: disable
+ 1: enable
+ RW
+
+
sysfs attribute writes interpretation
-------------------------------------
diff --git a/Documentation/hwmon/w83627ehf b/Documentation/hwmon/w83627ehf
index d6e1ae30fa6..b6eb59384bb 100644
--- a/Documentation/hwmon/w83627ehf
+++ b/Documentation/hwmon/w83627ehf
@@ -2,30 +2,40 @@ Kernel driver w83627ehf
=======================
Supported chips:
- * Winbond W83627EHF/EHG/DHG (ISA access ONLY)
+ * Winbond W83627EHF/EHG (ISA access ONLY)
Prefix: 'w83627ehf'
Addresses scanned: ISA address retrieved from Super I/O registers
Datasheet:
- http://www.winbond-usa.com/products/winbond_products/pdfs/PCIC/W83627EHF_%20W83627EHGb.pdf
- DHG datasheet confidential.
+ http://www.nuvoton.com.tw/NR/rdonlyres/A6A258F0-F0C9-4F97-81C0-C4D29E7E943E/0/W83627EHF.pdf
+ * Winbond W83627DHG
+ Prefix: 'w83627dhg'
+ Addresses scanned: ISA address retrieved from Super I/O registers
+ Datasheet:
+ http://www.nuvoton.com.tw/NR/rdonlyres/7885623D-A487-4CF9-A47F-30C5F73D6FE6/0/W83627DHG.pdf
+ * Winbond W83667HG
+ Prefix: 'w83667hg'
+ Addresses scanned: ISA address retrieved from Super I/O registers
+ Datasheet: not available
Authors:
Jean Delvare <khali@linux-fr.org>
Yuan Mu (Winbond)
Rudolf Marek <r.marek@assembler.cz>
David Hubbard <david.c.hubbard@gmail.com>
+ Gong Jun <JGong@nuvoton.com>
Description
-----------
-This driver implements support for the Winbond W83627EHF, W83627EHG, and
-W83627DHG super I/O chips. We will refer to them collectively as Winbond chips.
+This driver implements support for the Winbond W83627EHF, W83627EHG,
+W83627DHG and W83667HG super I/O chips. We will refer to them collectively
+as Winbond chips.
The chips implement three temperature sensors, five fan rotation
speed sensors, ten analog voltage sensors (only nine for the 627DHG), one
-VID (6 pins for the 627EHF/EHG, 8 pins for the 627DHG), alarms with beep
-warnings (control unimplemented), and some automatic fan regulation
-strategies (plus manual fan control mode).
+VID (6 pins for the 627EHF/EHG, 8 pins for the 627DHG and 667HG), alarms
+with beep warnings (control unimplemented), and some automatic fan
+regulation strategies (plus manual fan control mode).
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
@@ -54,7 +64,8 @@ follows:
temp1 -> pwm1
temp2 -> pwm2
temp3 -> pwm3
-prog -> pwm4 (the programmable setting is not supported by the driver)
+prog -> pwm4 (not on 667HG; the programmable setting is not supported by
+ the driver)
/sys files
----------