diff options
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/adt7411 | 42 | ||||
| -rw-r--r-- | Documentation/hwmon/adt7473 | 74 | ||||
| -rw-r--r-- | Documentation/hwmon/asc7621 | 296 | ||||
| -rw-r--r-- | Documentation/hwmon/it87 | 53 | ||||
| -rw-r--r-- | Documentation/hwmon/lm90 | 22 |
5 files changed, 398 insertions, 89 deletions
diff --git a/Documentation/hwmon/adt7411 b/Documentation/hwmon/adt7411 new file mode 100644 index 00000000000..1632960f974 --- /dev/null +++ b/Documentation/hwmon/adt7411 @@ -0,0 +1,42 @@ +Kernel driver adt7411 +===================== + +Supported chips: + * Analog Devices ADT7411 + Prefix: 'adt7411' + Addresses scanned: 0x48, 0x4a, 0x4b + Datasheet: Publicly available at the Analog Devices website + +Author: Wolfram Sang (based on adt7470 by Darrick J. Wong) + +Description +----------- + +This driver implements support for the Analog Devices ADT7411 chip. There may +be other chips that implement this interface. + +The ADT7411 can use an I2C/SMBus compatible 2-wire interface or an +SPI-compatible 4-wire interface. It provides a 10-bit analog to digital +converter which measures 1 temperature, vdd and 8 input voltages. It has an +internal temperature sensor, but an external one can also be connected (one +loses 2 inputs then). There are high- and low-limit registers for all inputs. + +Check the datasheet for details. + +sysfs-Interface +--------------- + +in0_input - vdd voltage input +in[1-8]_input - analog 1-8 input +temp1_input - temperature input + +Besides standard interfaces, this driver adds (0 = off, 1 = on): + + adc_ref_vdd - Use vdd as reference instead of 2.25 V + fast_sampling - Sample at 22.5 kHz instead of 1.4 kHz, but drop filters + no_average - Turn off averaging over 16 samples + +Notes +----- + +SPI, external temperature sensor and limit registers are not supported yet. diff --git a/Documentation/hwmon/adt7473 b/Documentation/hwmon/adt7473 deleted file mode 100644 index 446612bd1fb..00000000000 --- a/Documentation/hwmon/adt7473 +++ /dev/null @@ -1,74 +0,0 @@ -Kernel driver adt7473 -====================== - -Supported chips: - * Analog Devices ADT7473 - Prefix: 'adt7473' - Addresses scanned: I2C 0x2C, 0x2D, 0x2E - Datasheet: Publicly available at the Analog Devices website - -Author: Darrick J. Wong - -This driver is depreacted, please use the adt7475 driver instead. - -Description ------------ - -This driver implements support for the Analog Devices ADT7473 chip family. - -The ADT7473 uses the 2-wire interface compatible with the SMBUS 2.0 -specification. Using an analog to digital converter it measures three (3) -temperatures and two (2) voltages. It has four (4) 16-bit counters for -measuring fan speed. There are three (3) PWM outputs that can be used -to control fan speed. - -A sophisticated control system for the PWM outputs is designed into the -ADT7473 that allows fan speed to be adjusted automatically based on any of the -three temperature sensors. Each PWM output is individually adjustable and -programmable. Once configured, the ADT7473 will adjust the PWM outputs in -response to the measured temperatures without further host intervention. -This feature can also be disabled for manual control of the PWM's. - -Each of the measured inputs (voltage, temperature, fan speed) has -corresponding high/low limit values. The ADT7473 will signal an ALARM if -any measured value exceeds either limit. - -The ADT7473 samples all inputs continuously. The driver will not read -the registers more often than once every other second. Further, -configuration data is only read once per minute. - -Special Features ----------------- - -The ADT7473 have a 10-bit ADC and can therefore measure temperatures -with 0.25 degC resolution. Temperature readings can be configured either -for twos complement format or "Offset 64" format, wherein 63 is subtracted -from the raw value to get the temperature value. - -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 temp#_auto_point1_temp and -* pwm#_auto_point2_pwm and temp#_auto_point2_temp - - -point1: Set the pwm speed at a lower temperature bound. -point2: Set the pwm speed at a higher temperature bound. - -The ADT7473 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 temp#_max. - -Notes ------ - -The NVIDIA binary driver presents an ADT7473 chip via an on-card i2c bus. -Unfortunately, they fail to set the i2c adapter class, so this driver may -fail to find the chip until the nvidia driver is patched. diff --git a/Documentation/hwmon/asc7621 b/Documentation/hwmon/asc7621 new file mode 100644 index 00000000000..7287be7e1f2 --- /dev/null +++ b/Documentation/hwmon/asc7621 @@ -0,0 +1,296 @@ +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) diff --git a/Documentation/hwmon/it87 b/Documentation/hwmon/it87 index f9ba96c0ac4..8d08bf0d38e 100644 --- a/Documentation/hwmon/it87 +++ b/Documentation/hwmon/it87 @@ -5,31 +5,23 @@ Supported chips: * IT8705F Prefix: 'it87' Addresses scanned: from Super I/O config space (8 I/O ports) - Datasheet: Publicly available at the ITE website - http://www.ite.com.tw/product_info/file/pc/IT8705F_V.0.4.1.pdf + Datasheet: Once publicly available at the ITE website, but no longer * IT8712F Prefix: 'it8712' Addresses scanned: from Super I/O config space (8 I/O ports) - Datasheet: Publicly available at the ITE website - http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.1.pdf - http://www.ite.com.tw/product_info/file/pc/Errata%20V0.1%20for%20IT8712F%20V0.9.1.pdf - http://www.ite.com.tw/product_info/file/pc/IT8712F_V0.9.3.pdf + Datasheet: Once publicly available at the ITE website, but no longer * IT8716F/IT8726F Prefix: 'it8716' Addresses scanned: from Super I/O config space (8 I/O ports) - Datasheet: Publicly available at the ITE website - http://www.ite.com.tw/product_info/file/pc/IT8716F_V0.3.ZIP - http://www.ite.com.tw/product_info/file/pc/IT8726F_V0.3.pdf + Datasheet: Once publicly available at the ITE website, but no longer * IT8718F Prefix: 'it8718' Addresses scanned: from Super I/O config space (8 I/O ports) - Datasheet: Publicly available at the ITE website - http://www.ite.com.tw/product_info/file/pc/IT8718F_V0.2.zip - http://www.ite.com.tw/product_info/file/pc/IT8718F_V0%203_(for%20C%20version).zip + Datasheet: Once publicly available at the ITE website, but no longer * IT8720F Prefix: 'it8720' Addresses scanned: from Super I/O config space (8 I/O ports) - Datasheet: Not yet publicly available. + Datasheet: Not publicly available * SiS950 [clone of IT8705F] Prefix: 'it87' Addresses scanned: from Super I/O config space (8 I/O ports) @@ -136,6 +128,10 @@ registers are read whenever any data is read (unless it is less than 1.5 seconds since the last update). This means that you can easily miss once-only alarms. +Out-of-limit readings can also result in beeping, if the chip is properly +wired and configured. Beeping can be enabled or disabled per sensor type +(temperatures, voltages and fans.) + The IT87xx only updates its values each 1.5 seconds; reading it more often will do no harm, but will return 'old' values. @@ -150,11 +146,38 @@ Fan speed control ----------------- The fan speed control features are limited to manual PWM mode. Automatic -"Smart Guardian" mode control handling is not implemented. However -if you want to go for "manual mode" just write 1 to pwmN_enable. +"Smart Guardian" mode control handling is only implemented for older chips +(see below.) However if you want to go for "manual mode" just write 1 to +pwmN_enable. If you are only able to control the fan speed with very small PWM values, try lowering the PWM base frequency (pwm1_freq). Depending on the fan, it may give you a somewhat greater control range. The same frequency is used to drive all fan outputs, which is why pwm2_freq and pwm3_freq are read-only. + + +Automatic fan speed control (old interface) +------------------------------------------- + +The driver supports the old interface to automatic fan speed control +which is implemented by IT8705F chips up to revision F and IT8712F +chips up to revision G. + +This interface implements 4 temperature vs. PWM output trip points. +The PWM output of trip point 4 is always the maximum value (fan running +at full speed) while the PWM output of the other 3 trip points can be +freely chosen. The temperature of all 4 trip points can be freely chosen. +Additionally, trip point 1 has an hysteresis temperature attached, to +prevent fast switching between fan on and off. + +The chip automatically computes the PWM output value based on the input +temperature, based on this simple rule: if the temperature value is +between trip point N and trip point N+1 then the PWM output value is +the one of trip point N. The automatic control mode is less flexible +than the manual control mode, but it reacts faster, is more robust and +doesn't use CPU cycles. + +Trip points must be set properly before switching to automatic fan speed +control mode. The driver will perform basic integrity checks before +actually switching to automatic control mode. diff --git a/Documentation/hwmon/lm90 b/Documentation/hwmon/lm90 index 93d8e3d5515..6a03dd4bcc9 100644 --- a/Documentation/hwmon/lm90 +++ b/Documentation/hwmon/lm90 @@ -84,6 +84,10 @@ Supported chips: Addresses scanned: I2C 0x4c Datasheet: Publicly available at the Maxim website http://www.maxim-ic.com/quick_view2.cfm/qv_pk/3500 + * Winbond/Nuvoton W83L771AWG/ASG + Prefix: 'w83l771' + Addresses scanned: I2C 0x4c + Datasheet: Not publicly available, can be requested from Nuvoton Author: Jean Delvare <khali@linux-fr.org> @@ -147,6 +151,12 @@ MAX6680 and MAX6681: * Selectable address * Remote sensor type selection +W83L771AWG/ASG + * The AWG and ASG variants only differ in package format. + * Filter and alert configuration register at 0xBF + * Diode ideality factor configuration (remote sensor) at 0xE3 + * Moving average (depending on conversion rate) + All temperature values are given in degrees Celsius. Resolution is 1.0 degree for the local temperature, 0.125 degree for the remote temperature, except for the MAX6657, MAX6658 and MAX6659 which have a @@ -163,6 +173,18 @@ The lm90 driver will not update its values more frequently than every other second; reading them more often will do no harm, but will return 'old' values. +SMBus Alert Support +------------------- + +This driver has basic support for SMBus alert. When an alert is received, +the status register is read and the faulty temperature channel is logged. + +The Analog Devices chips (ADM1032 and ADT7461) do not implement the SMBus +alert protocol properly so additional care is needed: the ALERT output is +disabled when an alert is received, and is re-enabled only when the alarm +is gone. Otherwise the chip would block alerts from other chips in the bus +as long as the alarm is active. + PEC Support ----------- |