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| author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
|---|---|---|
| committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-27 10:05:51 +0000 |
| commit | 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 (patch) | |
| tree | a94efe259b9009378be6d90eb30d2b019d95c194 /Documentation/hwmon/max31790.rst | |
| parent | Initial commit. (diff) | |
| download | linux-upstream/5.10.209.tar.xz linux-upstream/5.10.209.zip | |
Adding upstream version 5.10.209.upstream/5.10.209upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'Documentation/hwmon/max31790.rst')
| -rw-r--r-- | Documentation/hwmon/max31790.rst | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/Documentation/hwmon/max31790.rst b/Documentation/hwmon/max31790.rst new file mode 100644 index 000000000..7b097c3b9 --- /dev/null +++ b/Documentation/hwmon/max31790.rst @@ -0,0 +1,44 @@ +Kernel driver max31790 +====================== + +Supported chips: + + * Maxim MAX31790 + + Prefix: 'max31790' + + Addresses scanned: - + + Datasheet: https://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 (duty cycle=0%), 1=manual mode, 2=rpm mode +pwm[1-6] RW read: current pwm duty cycle, + write: target pwm duty cycle (0-255) +================== === ======================================================= |