From 195a4b4298a7951c845dac2b326585c66add3435 Mon Sep 17 00:00:00 2001 From: Il Han Date: Sun, 30 Aug 2015 20:44:26 +0900 Subject: hwmon: Driver for Maxim MAX31790 The driver supports the Maxim MAX31790. Signed-off-by: Il Han Signed-off-by: Guenter Roeck --- Documentation/hwmon/max31790 | 37 +++++++++++++++++++++++++++++++++++++ 1 file changed, 37 insertions(+) create mode 100644 Documentation/hwmon/max31790 (limited to 'Documentation/hwmon/max31790') diff --git a/Documentation/hwmon/max31790 b/Documentation/hwmon/max31790 new file mode 100644 index 000000000000..855e62430da9 --- /dev/null +++ b/Documentation/hwmon/max31790 @@ -0,0 +1,37 @@ +Kernel driver max31790 +====================== + +Supported chips: + * Maxim MAX31790 + Prefix: 'max31790' + Addresses scanned: - + Datasheet: http://pdfserv.maximintegrated.com/en/ds/MAX31790.pdf + +Author: Il Han + + +Description +----------- + +This driver implements support for the Maxim MAX31790 chip. + +The MAX31790 controls the speeds of up to six fans using six independent +PWM outputs. The desired fan speeds (or PWM duty cycles) are written +through the I2C interface. The outputs drive "4-wire" fans directly, +or can be used to modulate the fan's power terminals using an external +pass transistor. + +Tachometer inputs monitor fan tachometer logic outputs for precise (+/-1%) +monitoring and control of fan RPM as well as detection of fan failure. +Six pins are dedicated tachometer inputs. Any of the six PWM outputs can +also be configured to serve as tachometer inputs. + + +Sysfs entries +------------- + +fan[1-12]_input RO fan tachometer speed in RPM +fan[1-12]_fault RO fan experienced fault +fan[1-6]_target RW desired fan speed in RPM +pwm[1-6]_enable RW regulator mode, 0=disabled, 1=manual mode, 2=rpm mode +pwm[1-6] RW fan target duty cycle (0-255) -- cgit