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authorAndrew Jeffery <andrew@aj.id.au>2017-11-20 15:12:04 +1030
committerGuenter Roeck <linux@roeck-us.net>2018-01-02 15:05:34 -0800
commit56ad86b4b16e4b7154300d71f8e93cca64b98e92 (patch)
tree63c230c464b68ca3de3eeaa538c6bc2058fded49 /Documentation/hwmon/max31785
parentd206636e7697f47332774f29b90b92f6047d265d (diff)
hwmon: (pmbus/max31785) Add fan control
The implementation makes use of the new fan control virtual registers exposed by the pmbus core. It mixes use of the default implementations with some overrides via the read/write handlers to handle FAN_COMMAND_1 on the MAX31785, whose definition breaks the value range into various control bands dependent on RPM or PWM mode. Signed-off-by: Andrew Jeffery <andrew@aj.id.au> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/max31785')
-rw-r--r--Documentation/hwmon/max317857
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/hwmon/max31785 b/Documentation/hwmon/max31785
index 45fb6093dec2..7b0a0a8cdb6b 100644
--- a/Documentation/hwmon/max31785
+++ b/Documentation/hwmon/max31785
@@ -32,6 +32,7 @@ Sysfs attributes
fan[1-4]_alarm Fan alarm.
fan[1-4]_fault Fan fault.
fan[1-4]_input Fan RPM.
+fan[1-4]_target Fan input target
in[1-6]_crit Critical maximum output voltage
in[1-6]_crit_alarm Output voltage critical high alarm
@@ -44,6 +45,12 @@ in[1-6]_max_alarm Output voltage high alarm
in[1-6]_min Minimum output voltage
in[1-6]_min_alarm Output voltage low alarm
+pwm[1-4] Fan target duty cycle (0..255)
+pwm[1-4]_enable 0: Full-speed
+ 1: Manual PWM control
+ 2: Automatic PWM (tach-feedback RPM fan-control)
+ 3: Automatic closed-loop (temp-feedback fan-control)
+
temp[1-11]_crit Critical high temperature
temp[1-11]_crit_alarm Chip temperature critical high alarm
temp[1-11]_input Measured temperature

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