From aaf6fabf1be80b66aade0544e0ad619682e26616 Mon Sep 17 00:00:00 2001 From: Chris Packham Date: Tue, 11 Oct 2016 10:26:31 +1300 Subject: 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 Acked-by: Rob Herring [groeck: Fixed continuation line alignments] Signed-off-by: Guenter Roeck --- Documentation/hwmon/tc654 | 31 +++++++++++++++++++++++++++++++ 1 file changed, 31 insertions(+) create mode 100644 Documentation/hwmon/tc654 (limited to 'Documentation/hwmon') diff --git a/Documentation/hwmon/tc654 b/Documentation/hwmon/tc654 new file mode 100644 index 0000000..91a2843 --- /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 + Masahiko Iwamoto + +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. -- cgit v1.1