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author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
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committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-01-20 14:01:31 -0300 |
commit | b4b7ff4b08e691656c9d77c758fc355833128ac0 (patch) | |
tree | 82fcb00e6b918026dc9f2d1f05ed8eee83874cc0 /Documentation/hwmon/max31790 | |
parent | 35acfa0fc609f2a2cd95cef4a6a9c3a5c38f1778 (diff) |
Linux-libre 4.4-gnupck-4.4-gnu
Diffstat (limited to 'Documentation/hwmon/max31790')
-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 000000000..855e62430 --- /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) |