Some laptops (for example Toshiba Satellite Z830) only supports some fixed values. Allow for this and document the expected behaviour in such cases. Acked-by: Sebastian Reichel <sebastian.reichel@xxxxxxxxxxxxx> Signed-off-by: Arvid Norlander <lkml@xxxxxxxxx> --- Documentation/ABI/testing/sysfs-class-power | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/Documentation/ABI/testing/sysfs-class-power b/Documentation/ABI/testing/sysfs-class-power index a9ce63cfbe87..e434fc523291 100644 --- a/Documentation/ABI/testing/sysfs-class-power +++ b/Documentation/ABI/testing/sysfs-class-power @@ -364,7 +364,10 @@ Date: April 2019 Contact: linux-pm@xxxxxxxxxxxxxxx Description: Represents a battery percentage level, above which charging will - stop. + stop. Not all hardware is capable of setting this to an arbitrary + percentage. Drivers will round written values to the nearest + supported value. Reading back the value will show the actual + threshold set by the driver. Access: Read, Write -- 2.37.3
