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| author | Chris Packham <chris.packham@alliedtelesis.co.nz> | 2016-10-11 10:26:31 +1300 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2016-12-02 13:28:05 -0800 |
| commit | aaf6fabf1be80b66aade0544e0ad619682e26616 (patch) | |
| tree | df02b5ebcb8c1fbf5c2efc64d11eff21bb696e28 /Documentation/hwmon/tc654 | |
| parent | 4538bfbf2d9f1fc48c07ac0cc0ee58716fe7fe96 (diff) | |
| download | linux-aaf6fabf1be80b66aade0544e0ad619682e26616.tar.gz linux-aaf6fabf1be80b66aade0544e0ad619682e26616.tar.bz2 linux-aaf6fabf1be80b66aade0544e0ad619682e26616.zip | |
hwmon: Add tc654 driver
Add support for the tc654 and tc655 fan controllers from Microchip.
http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf
Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Acked-by: Rob Herring <robh@kernel.org>
[groeck: Fixed continuation line alignments]
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/tc654')
| -rw-r--r-- | Documentation/hwmon/tc654 | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/Documentation/hwmon/tc654 b/Documentation/hwmon/tc654 new file mode 100644 index 000000000000..91a2843f5f98 --- /dev/null +++ b/Documentation/hwmon/tc654 @@ -0,0 +1,31 @@ +Kernel driver tc654 +=================== + +Supported chips: + * Microship TC654 and TC655 + Prefix: 'tc654' + Datasheet: http://ww1.microchip.com/downloads/en/DeviceDoc/20001734C.pdf + +Authors: + Chris Packham <chris.packham@alliedtelesis.co.nz> + Masahiko Iwamoto <iwamoto@allied-telesis.co.jp> + +Description +----------- +This driver implements support for the Microchip TC654 and TC655. + +The TC654 uses the 2-wire interface compatible with the SMBUS 2.0 +specification. The TC654 has two (2) inputs for measuring fan RPM and +one (1) PWM output which can be used for fan control. + +Configuration Notes +------------------- +Ordinarily the pwm1_mode ABI is used for controlling the pwm output +mode. However, for this chip the output is always pwm, and the +pwm1_mode determines if the pwm output is controlled via the pwm1 value +or via the Vin analog input. + + +Setting pwm1_mode to 1 will cause the pwm output to be driven based on +the pwm1 value. Setting pwm1_mode to 0 will cause the pwm output to be +driven based on the Vin input. |