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| author | Il Han <corone.il.han@gmail.com> | 2015-08-30 13:44:26 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2015-10-14 16:57:14 +0200 |
| commit | 195a4b4298a7951c845dac2b326585c66add3435 (patch) | |
| tree | ea2e8e46af138e75ccc0f36f0d5f4d40958496d7 /Documentation/hwmon | |
| parent | Linux 4.3-rc5 (diff) | |
| download | linux-195a4b4298a7951c845dac2b326585c66add3435.tar.xz linux-195a4b4298a7951c845dac2b326585c66add3435.zip | |
hwmon: Driver for Maxim MAX31790
The driver supports the Maxim MAX31790.
Signed-off-by: Il Han <corone.il.han@gmail.com>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon')
| -rw-r--r-- | Documentation/hwmon/max31790 | 37 |
1 files changed, 37 insertions, 0 deletions
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 <corone.il.han@gmail.com> + + +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) |