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diff --git a/Documentation/hwmon/w83627hf.rst b/Documentation/hwmon/w83627hf.rst new file mode 100644 index 000000000000..d1406c28dee7 --- /dev/null +++ b/Documentation/hwmon/w83627hf.rst @@ -0,0 +1,124 @@ +Kernel driver w83627hf +====================== + +Supported chips: + * Winbond W83627HF (ISA accesses ONLY) + Prefix: 'w83627hf' + Addresses scanned: ISA address retrieved from Super I/O registers + * Winbond W83627THF + Prefix: 'w83627thf' + Addresses scanned: ISA address retrieved from Super I/O registers + * Winbond W83697HF + Prefix: 'w83697hf' + Addresses scanned: ISA address retrieved from Super I/O registers + * Winbond W83637HF + Prefix: 'w83637hf' + Addresses scanned: ISA address retrieved from Super I/O registers + * Winbond W83687THF + Prefix: 'w83687thf' + Addresses scanned: ISA address retrieved from Super I/O registers + Datasheet: Provided by Winbond on request(http://www.winbond.com/hq/enu) + +Authors: + Frodo Looijaard <frodol@dds.nl>, + Philip Edelbrock <phil@netroedge.com>, + Mark Studebaker <mdsxyz123@yahoo.com>, + Bernhard C. Schrenk <clemy@clemy.org> + +Module Parameters +----------------- + +* force_i2c: int + Initialize the I2C address of the sensors +* init: int + (default is 1) + Use 'init=0' to bypass initializing the chip. + Try this if your computer crashes when you load the module. + +Description +----------- + +This driver implements support for ISA accesses *only* for +the Winbond W83627HF, W83627THF, W83697HF and W83637HF Super I/O chips. +We will refer to them collectively as Winbond chips. + +This driver supports ISA accesses, which should be more reliable +than i2c accesses. Also, for Tyan boards which contain both a +Super I/O chip and a second i2c-only Winbond chip (often a W83782D), +using this driver will avoid i2c address conflicts and complex +initialization that were required in the w83781d driver. + +If you really want i2c accesses for these Super I/O chips, +use the w83781d driver. However this is not the preferred method +now that this ISA driver has been developed. + +The `w83627_HF_` uses pins 110-106 as VID0-VID4. The `w83627_THF_` uses the +same pins as GPIO[0:4]. Technically, the `w83627_THF_` does not support a +VID reading. However the two chips have the identical 128 pin package. So, +it is possible or even likely for a w83627thf to have the VID signals routed +to these pins despite their not being labeled for that purpose. Therefore, +the w83627thf driver interprets these as VID. If the VID on your board +doesn't work, first see doc/vid in the lm_sensors package[1]. If that still +doesn't help, you may just ignore the bogus VID reading with no harm done. + +For further information on this driver see the w83781d driver documentation. + +[1] http://www.lm-sensors.org/browser/lm-sensors/trunk/doc/vid + +Forcing the address +------------------- + +The driver used to have a module parameter named force_addr, which could +be used to force the base I/O address of the hardware monitoring block. +This was meant as a workaround for mainboards with a broken BIOS. This +module parameter is gone for technical reasons. If you need this feature, +you can obtain the same result by using the isaset tool (part of +lm-sensors) before loading the driver: + +# Enter the Super I/O config space:: + + isaset -y -f 0x2e 0x87 + isaset -y -f 0x2e 0x87 + +# Select the hwmon logical device:: + + isaset -y 0x2e 0x2f 0x07 0x0b + +# Set the base I/O address (to 0x290 in this example):: + + isaset -y 0x2e 0x2f 0x60 0x02 + isaset -y 0x2e 0x2f 0x61 0x90 + +# Exit the Super-I/O config space:: + + isaset -y -f 0x2e 0xaa + +The above sequence assumes a Super-I/O config space at 0x2e/0x2f, but +0x4e/0x4f is also possible. + +Voltage pin mapping +------------------- + +Here is a summary of the voltage pin mapping for the W83627THF. This +can be useful to convert data provided by board manufacturers into +working libsensors configuration statements: + + +- W83627THF + + + ======== =============== =============== =============== + Pin Name Register Sysfs attribute + ======== =============== =============== =============== + 100 CPUVCORE 20h in0 + 99 VIN0 21h in1 + 98 VIN1 22h in2 + 97 VIN2 24h in4 + 114 AVCC 23h in3 + 61 5VSB 50h (bank 5) in7 + 74 VBAT 51h (bank 5) in8 + ======== =============== =============== =============== + +For other supported devices, you'll have to take the hard path and +look up the information in the datasheet yourself (and then add it +to this document please.) |