Caesar, On Fri, Oct 23, 2015 at 4:25 AM, Caesar Wang <wxt at rock-chips.com> wrote: > When we come out of system suspend state (S3) the tsadc will have been > reset and back at its default state. While reprogramming the tsadc > it's possible that we'll glitch the output and unintentionally cause > the "over temperature" GPIO to be asserted. Since the over > temperature GPIO is often hooked up to something that will cause a > reboot or shutdown in hardware, this glitch can be catastrophic on > some boards. > > We'll add support for selecting the "sleep" pinctrl state at suspend > time. Boards can use this to effectively disable the tsadc at suspend > time and avoid glitches when the system is resumed. > > Signed-off-by: Caesar Wang <wxt at rock-chips.com> > > --- > > Changes in v4: > - take the Doug's commit as correct decription. > > Changes in v3: > - Add the pinctrl state for in the suspend/resume. > > Changes in v2: None > Changes in v1: None > > drivers/thermal/rockchip_thermal.c | 4 ++++ > 1 file changed, 4 insertions(+) Reviewed-by: Douglas Anderson <dianders at chromium.org>
