diff options
| author | Armin Wolf <W_Armin@gmx.de> | 2025-09-17 20:10:35 +0200 |
|---|---|---|
| committer | Guenter Roeck <linux@roeck-us.net> | 2025-09-24 07:50:09 -0700 |
| commit | 1c1658058c99bcfd3b2347e587a556986037f80a (patch) | |
| tree | aefc70fefe8cea4a960d57127d339c60416f7c47 /include/uapi | |
| parent | 205c730262215fe1940668394a856f69ece55c66 (diff) | |
hwmon: (dell-smm) Add support for automatic fan mode
Many machines treat fan state 3 as some sort of automatic mode,
which is superior to the separate SMM calls for switching to
automatic fan mode for two reasons:
- the fan control mode can be controlled for each fan separately
- the current fan control mode can be retrieved from the BIOS
On some machines however, this special fan state does not exist.
Fan state 3 acts like a regular fan state on such machines or
does not exist at all. Such machines usually use separate SMM calls
for enabling/disabling automatic fan control.
Add support for it. If the machine supports separate SMM calls
for changing the fan control mode, then the other interface is
ignored.
Signed-off-by: Armin Wolf <W_Armin@gmx.de>
Link: https://lore.kernel.org/r/20250917181036.10972-4-W_Armin@gmx.de
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Diffstat (limited to 'include/uapi')
| -rw-r--r-- | include/uapi/linux/i8k.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/include/uapi/linux/i8k.h b/include/uapi/linux/i8k.h index 268e6268f6c8..a16e4049710f 100644 --- a/include/uapi/linux/i8k.h +++ b/include/uapi/linux/i8k.h @@ -36,6 +36,8 @@ #define I8K_FAN_LOW 1 #define I8K_FAN_HIGH 2 #define I8K_FAN_TURBO 3 +/* Many machines treat this mode as some sort of automatic mode */ +#define I8K_FAN_AUTO 3 #define I8K_FAN_MAX I8K_FAN_TURBO #define I8K_VOL_UP 1 |