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authorMarius Zachmann <mail@mariuszachmann.de>2020-07-21 11:54:47 +0300
committerGuenter Roeck <linux@roeck-us.net>2020-07-24 17:44:57 +0300
commitfa4dac3e1bf7fadb4c5e098dcd721eafe3cd80c5 (patch)
tree591905266109c56f8949c00f09ea5bb756bb7163 /Documentation/hwmon/corsair-cpro.rst
parente4922176e1669f174e101d321d76fdc1a134f7ac (diff)
downloadlinux-fa4dac3e1bf7fadb4c5e098dcd721eafe3cd80c5.tar.xz
hwmon: (corsair-cpro) add reading pwm values
This adds the possibility for reading pwm values. These can not be read if the device is controlled via fan_target or a fan curve and will return an error in this case. Since an error is expected, this adds some rudimentary error handling. Changes: - add CTL_GET_FAN_PWM and use it via get_data - pwm returns -ENODATA if the device returns error 0x12 - fan_target now returns -ENODATA when the driver is started or a pwm value is set. - add ccp_get_errno to determine errno from device error. - get_data now has a parameter to determine whether to read one or two bytes of data. - update documentation - fix missing surname in MAINTAINERS Signed-off-by: Marius Zachmann <mail@mariuszachmann.de> Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'Documentation/hwmon/corsair-cpro.rst')
-rw-r--r--Documentation/hwmon/corsair-cpro.rst7
1 files changed, 3 insertions, 4 deletions
diff --git a/Documentation/hwmon/corsair-cpro.rst b/Documentation/hwmon/corsair-cpro.rst
index 78820156f07d..751f95476b57 100644
--- a/Documentation/hwmon/corsair-cpro.rst
+++ b/Documentation/hwmon/corsair-cpro.rst
@@ -35,8 +35,7 @@ fan[1-6]_input Connected fan rpm.
fan[1-6]_label Shows fan type as detected by the device.
fan[1-6]_target Sets fan speed target rpm.
When reading, it reports the last value if it was set by the driver.
- Otherwise returns 0.
-pwm[1-6] Sets the fan speed. Values from 0-255.
- When reading, it reports the last value if it was set by the driver.
- Otherwise returns 0.
+ Otherwise returns an error.
+pwm[1-6] Sets the fan speed. Values from 0-255. Can only be read if pwm
+ was set directly.
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