summaryrefslogtreecommitdiffstats
path: root/Documentation/hwmon/asc7621
diff options
context:
space:
mode:
Diffstat (limited to 'Documentation/hwmon/asc7621')
-rw-r--r--Documentation/hwmon/asc7621296
1 files changed, 0 insertions, 296 deletions
diff --git a/Documentation/hwmon/asc7621 b/Documentation/hwmon/asc7621
deleted file mode 100644
index 7287be7..0000000
--- a/Documentation/hwmon/asc7621
+++ /dev/null
@@ -1,296 +0,0 @@
-Kernel driver asc7621
-==================
-
-Supported chips:
- Andigilog aSC7621 and aSC7621a
- Prefix: 'asc7621'
- Addresses scanned: I2C 0x2c, 0x2d, 0x2e
- Datasheet: http://www.fairview5.com/linux/asc7621/asc7621.pdf
-
-Author:
- George Joseph
-
-Description provided by Dave Pivin @ Andigilog:
-
-Andigilog has both the PECI and pre-PECI versions of the Heceta-6, as
-Intel calls them. Heceta-6e has high frequency PWM and Heceta-6p has
-added PECI and a 4th thermal zone. The Andigilog aSC7611 is the
-Heceta-6e part and aSC7621 is the Heceta-6p part. They are both in
-volume production, shipping to Intel and their subs.
-
-We have enhanced both parts relative to the governing Intel
-specification. First enhancement is temperature reading resolution. We
-have used registers below 20h for vendor-specific functions in addition
-to those in the Intel-specified vendor range.
-
-Our conversion process produces a result that is reported as two bytes.
-The fan speed control uses this finer value to produce a "step-less" fan
-PWM output. These two bytes are "read-locked" to guarantee that once a
-high or low byte is read, the other byte is locked-in until after the
-next read of any register. So to get an atomic reading, read high or low
-byte, then the very next read should be the opposite byte. Our data
-sheet says 10-bits of resolution, although you may find the lower bits
-are active, they are not necessarily reliable or useful externally. We
-chose not to mask them.
-
-We employ significant filtering that is user tunable as described in the
-data sheet. Our temperature reports and fan PWM outputs are very smooth
-when compared to the competition, in addition to the higher resolution
-temperature reports. The smoother PWM output does not require user
-intervention.
-
-We offer GPIO features on the former VID pins. These are open-drain
-outputs or inputs and may be used as general purpose I/O or as alarm
-outputs that are based on temperature limits. These are in 19h and 1Ah.
-
-We offer flexible mapping of temperature readings to thermal zones. Any
-temperature may be mapped to any zone, which has a default assignment
-that follows Intel's specs.
-
-Since there is a fan to zone assignment that allows for the "hotter" of
-a set of zones to control the PWM of an individual fan, but there is no
-indication to the user, we have added an indicator that shows which zone
-is currently controlling the PWM for a given fan. This is in register
-00h.
-
-Both remote diode temperature readings may be given an offset value such
-that the reported reading as well as the temperature used to determine
-PWM may be offset for system calibration purposes.
-
-PECI Extended configuration allows for having more than two domains per
-PECI address and also provides an enabling function for each PECI
-address. One could use our flexible zone assignment to have a zone
-assigned to up to 4 PECI addresses. This is not possible in the default
-Intel configuration. This would be useful in multi-CPU systems with
-individual fans on each that would benefit from individual fan control.
-This is in register 0Eh.
-
-The tachometer measurement system is flexible and able to adapt to many
-fan types. We can also support pulse-stretched PWM so that 3-wire fans
-may be used. These characteristics are in registers 04h to 07h.
-
-Finally, we have added a tach disable function that turns off the tach
-measurement system for individual tachs in order to save power. That is
-in register 75h.
-
---
-aSC7621 Product Description
-
-The aSC7621 has a two wire digital interface compatible with SMBus 2.0.
-Using a 10-bit ADC, the aSC7621 measures the temperature of two remote diode
-connected transistors as well as its own die. Support for Platform
-Environmental Control Interface (PECI) is included.
-
-Using temperature information from these four zones, an automatic fan speed
-control algorithm is employed to minimize acoustic impact while achieving
-recommended CPU temperature under varying operational loads.
-
-To set fan speed, the aSC7621 has three independent pulse width modulation
-(PWM) outputs that are controlled by one, or a combination of three,
-temperature zones. Both high- and low-frequency PWM ranges are supported.
-
-The aSC7621 also includes a digital filter that can be invoked to smooth
-temperature readings for better control of fan speed and minimum acoustic
-impact.
-
-The aSC7621 has tachometer inputs to measure fan speed on up to four fans.
-Limit and status registers for all measured values are included to alert
-the system host that any measurements are outside of programmed limits
-via status registers.
-
-System voltages of VCCP, 2.5V, 3.3V, 5.0V, and 12V motherboard power are
-monitored efficiently with internal scaling resistors.
-
-Features
-- Supports PECI interface and monitors internal and remote thermal diodes
-- 2-wire, SMBus 2.0 compliant, serial interface
-- 10-bit ADC
-- Monitors VCCP, 2.5V, 3.3V, 5.0V, and 12V motherboard/processor supplies
-- Programmable autonomous fan control based on temperature readings
-- Noise filtering of temperature reading for fan speed control
-- 0.25C digital temperature sensor resolution
-- 3 PWM fan speed control outputs for 2-, 3- or 4-wire fans and up to 4 fan
- tachometer inputs
-- Enhanced measured temperature to Temperature Zone assignment.
-- Provides high and low PWM frequency ranges
-- 3 GPIO pins for custom use
-- 24-Lead QSOP package
-
-Configuration Notes
-===================
-
-Except where noted below, the sysfs entries created by this driver follow
-the standards defined in "sysfs-interface".
-
-temp1_source
- 0 (default) peci_legacy = 0, Remote 1 Temperature
- peci_legacy = 1, PECI Processor Temperature 0
- 1 Remote 1 Temperature
- 2 Remote 2 Temperature
- 3 Internal Temperature
- 4 PECI Processor Temperature 0
- 5 PECI Processor Temperature 1
- 6 PECI Processor Temperature 2
- 7 PECI Processor Temperature 3
-
-temp2_source
- 0 (default) Internal Temperature
- 1 Remote 1 Temperature
- 2 Remote 2 Temperature
- 3 Internal Temperature
- 4 PECI Processor Temperature 0
- 5 PECI Processor Temperature 1
- 6 PECI Processor Temperature 2
- 7 PECI Processor Temperature 3
-
-temp3_source
- 0 (default) Remote 2 Temperature
- 1 Remote 1 Temperature
- 2 Remote 2 Temperature
- 3 Internal Temperature
- 4 PECI Processor Temperature 0
- 5 PECI Processor Temperature 1
- 6 PECI Processor Temperature 2
- 7 PECI Processor Temperature 3
-
-temp4_source
- 0 (default) peci_legacy = 0, PECI Processor Temperature 0
- peci_legacy = 1, Remote 1 Temperature
- 1 Remote 1 Temperature
- 2 Remote 2 Temperature
- 3 Internal Temperature
- 4 PECI Processor Temperature 0
- 5 PECI Processor Temperature 1
- 6 PECI Processor Temperature 2
- 7 PECI Processor Temperature 3
-
-temp[1-4]_smoothing_enable
-temp[1-4]_smoothing_time
- Smooths spikes in temp readings caused by noise.
- Valid values in milliseconds are:
- 35000
- 17600
- 11800
- 7000
- 4400
- 3000
- 1600
- 800
-
-temp[1-4]_crit
- When the corresponding zone temperature reaches this value,
- ALL pwm outputs will got to 100%.
-
-temp[5-8]_input
-temp[5-8]_enable
- The aSC7621 can also read temperatures provided by the processor
- via the PECI bus. Usually these are "core" temps and are relative
- to the point where the automatic thermal control circuit starts
- throttling. This means that these are usually negative numbers.
-
-pwm[1-3]_enable
- 0 Fan off.
- 1 Fan on manual control.
- 2 Fan on automatic control and will run at the minimum pwm
- if the temperature for the zone is below the minimum.
- 3 Fan on automatic control but will be off if the temperature
- for the zone is below the minimum.
- 4-254 Ignored.
- 255 Fan on full.
-
-pwm[1-3]_auto_channels
- Bitmap as described in sysctl-interface with the following
- exceptions...
- Only the following combination of zones (and their corresponding masks)
- are valid:
- 1
- 2
- 3
- 2,3
- 1,2,3
- 4
- 1,2,3,4
-
- Special values:
- 0 Disabled.
- 16 Fan on manual control.
- 31 Fan on full.
-
-
-pwm[1-3]_invert
- When set, inverts the meaning of pwm[1-3].
- i.e. when pwm = 0, the fan will be on full and
- when pwm = 255 the fan will be off.
-
-pwm[1-3]_freq
- PWM frequency in Hz
- Valid values in Hz are:
-
- 10
- 15
- 23
- 30 (default)
- 38
- 47
- 62
- 94
- 23000
- 24000
- 25000
- 26000
- 27000
- 28000
- 29000
- 30000
-
- Setting any other value will be ignored.
-
-peci_enable
- Enables or disables PECI
-
-peci_avg
- Input filter average time.
-
- 0 0 Sec. (no Smoothing) (default)
- 1 0.25 Sec.
- 2 0.5 Sec.
- 3 1.0 Sec.
- 4 2.0 Sec.
- 5 4.0 Sec.
- 6 8.0 Sec.
- 7 0.0 Sec.
-
-peci_legacy
-
- 0 Standard Mode (default)
- Remote Diode 1 reading is associated with
- Temperature Zone 1, PECI is associated with
- Zone 4
-
- 1 Legacy Mode
- PECI is associated with Temperature Zone 1,
- Remote Diode 1 is associated with Zone 4
-
-peci_diode
- Diode filter
-
- 0 0.25 Sec.
- 1 1.1 Sec.
- 2 2.4 Sec. (default)
- 3 3.4 Sec.
- 4 5.0 Sec.
- 5 6.8 Sec.
- 6 10.2 Sec.
- 7 16.4 Sec.
-
-peci_4domain
- Four domain enable
-
- 0 1 or 2 Domains for enabled processors (default)
- 1 3 or 4 Domains for enabled processors
-
-peci_domain
- Domain
-
- 0 Processor contains a single domain (0) (default)
- 1 Processor contains two domains (0,1)