Add manual fan control #512
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crawfxrd
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system76/ec#512 added a manual fan control option. In manual control mode, the system firmware or OS is responsible for setting the fan target duty percent to manage thermals. Percent is used rather than raw PWM value (as is returned in GFAN) as the EC may be configured in such a way that the valid range is not 0-255. Change-Id: Iba8cd5ac540f9fdc20473831787cafb6c1fd8129 Signed-off-by: Tim Crawford <[email protected]>
crawfxrd
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Dec 31, 2024
system76/ec#512 added a manual fan control option. In manual control mode, the system firmware or OS is responsible for setting the fan target duty percent to manage thermals. Percent is used rather than raw PWM value (as is returned in GFAN) as the EC may be configured in such a way that the valid range is not 0-255. RPM target is not supported. Change-Id: Iba8cd5ac540f9fdc20473831787cafb6c1fd8129 Signed-off-by: Tim Crawford <[email protected]>
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crawfxrd
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Jan 2, 2025
system76/ec#512 added a manual fan control option. In manual control mode, the system firmware or OS is responsible for setting the fan target duty to manage thermals. CTR0 in the EC code determines the maximum valid PWM duty, which is hard-coded to 255. RPM target is not supported. Change-Id: Iba8cd5ac540f9fdc20473831787cafb6c1fd8129 Signed-off-by: Tim Crawford <[email protected]>
crawfxrd
added a commit
to system76/coreboot
that referenced
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Jan 2, 2025
system76/ec#512 added a manual fan control option. In manual control mode, the system firmware or OS is responsible for setting the fan target duty to manage thermals. CTR0 in the EC code determines the maximum valid PWM duty, which is hard-coded to 255. RPM target is not supported. Change-Id: Iba8cd5ac540f9fdc20473831787cafb6c1fd8129 Signed-off-by: Tim Crawford <[email protected]>
crawfxrd
added a commit
to system76/coreboot
that referenced
this pull request
Jan 2, 2025
system76/ec#512 added a manual fan control option. In PWM control mode, the system firmware or OS is responsible for setting the fan target duty to manage thermals. CTR0 in the EC code determines the maximum valid PWM duty, which is hard-coded to 255. RPM target is not supported. Change-Id: Iba8cd5ac540f9fdc20473831787cafb6c1fd8129 Signed-off-by: Tim Crawford <[email protected]>
Make the command and function names explicit that they are for controlling fan PWM duty. Signed-off-by: Tim Crawford <[email protected]>
Allow fan target duties to be set via ACPI or SMFI command. This will allow system firmware or OS to set fan duty, which can be used for testing or implementing user-defined fan tables. Setting PWM via SMFI already existed, but would not work as the value would simply be overwritten by the EC. RPM target is not supported. Signed-off-by: Tim Crawford <[email protected]>
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Allow fan target duties to be set via ACPI or SMFI command. This will allow system firmware or OS to set fan duty, which can be used for testing or implementing user-defined fan tables.
Setting PWM via SMFI already existed, but would not work as the value would simply be overwritten by the EC.
RPM target is not supported.
Ref: system76/coreboot#245
Ref: system76/firmware-open#570
Ref: system76/firmware-open#571