On 5/30/17 10:05 PM, Hao Wei Tee wrote: > On 5/30/17 9:22 PM, Andy Shevchenko wrote: >> On Sun, May 28, 2017 at 4:47 PM, Hao Wei Tee <angelsl@xxxxxxxxxxx> wrote: >>> On 5/27/17 3:31 PM, Hao Wei Tee wrote: >>>> This exposes the battery conservation mode present on some (?) IdeaPads. >>>> The mode is set by calling ACPI method SBMC with argument 3 (on) or >>>> 5 (off). Status is reported in bit 5 of the return value of ACPI method >>>> GBMD. >>>> >>>> This patch was written based on an IdeaPad U430p. I'm not sure if the ACPI >>>> methods are the same across all IdeaPads, so it would be great if this got more >>>> testing across other models before it's merged. >>> >>> I got someone to test on an IdeaPad Y510p. It works on that too. >> >> Do we have any other option that expose something via sysfs? >> > > Sorry, not sure what you meant. > > If you meant > >> Do we have any other options than expose something via sysfs? > > I'm not sure, maybe an ioctl? That wouldn't be very convenient though. > > The tp_smapi module (not in mainline) that exposes the battery threshold > functionality for ThinkPads also uses sysfs. > > If you meant > >> Do we have any other options that expose something via sysfs? > > yes, camera_power, fan_mode, touchpad and conservation_mode. Any thoughts on this? -- Hao Wei
