On Thu, 2012-11-22 at 10:11 +0530, Amit Kachhap wrote:
> On 22 November 2012 06:52, Zhang Rui <rui.zhang@xxxxxxxxx> wrote:
> > On Thu, 2012-11-08 at 09:56 +0530, Amit Daniel Kachhap wrote:
> >> This modification adds 2 new thermal trend type THERMAL_TREND_RAISE_FULL
> >> and THERMAL_TREND_DROP_FULL. This thermal trend can be used to quickly
> >> jump to the upper or lower cooling level instead of incremental increase
> >> or decrease. This is needed for temperature sensors which support rising/falling
> >> threshold interrupts and polling can be totally avoided.
> >>
> >> Signed-off-by: Amit Daniel Kachhap <amit.daniel@xxxxxxxxxxx>
> >> Signed-off-by: Amit Daniel Kachhap <amit.kachhap@xxxxxxxxxx>
> >> ---
> >> drivers/thermal/step_wise.c | 19 +++++++++++++++----
> >> include/linux/thermal.h | 2 ++
> >> 2 files changed, 17 insertions(+), 4 deletions(-)
> >>
> >> diff --git a/drivers/thermal/step_wise.c b/drivers/thermal/step_wise.c
> >> index 1242cff..0d2d8d6 100644
> >> --- a/drivers/thermal/step_wise.c
> >> +++ b/drivers/thermal/step_wise.c
> >> @@ -35,6 +35,10 @@
> >> * state for this trip point
> >> * b. if the trend is THERMAL_TREND_DROPPING, use lower cooling
> >> * state for this trip point
> >> + * c. if the trend is THERMAL_TREND_RAISE_FULL, use highest cooling
> >> + * state for this trip point
> >> + * d. if the trend is THERMAL_TREND_DROP_FULL, use lowest cooling
> >> + * state for this trip point
> >> */
> >> static unsigned long get_target_state(struct thermal_instance *instance,
> >> enum thermal_trend trend)
> >> @@ -50,7 +54,10 @@ static unsigned long get_target_state(struct thermal_instance *instance,
> >> } else if (trend == THERMAL_TREND_DROPPING) {
> >> cur_state = cur_state > instance->lower ?
> >> (cur_state - 1) : instance->lower;
> >> - }
> >> + } else if (trend == THERMAL_TREND_RAISE_FULL)
> >> + cur_state = instance->upper;
> >> + else if (trend == THERMAL_TREND_DROP_FULL)
> >> + cur_state = instance->lower;
> >>
> >> return cur_state;
> >> }
> >> @@ -87,7 +94,8 @@ static void update_instance_for_throttle(struct thermal_zone_device *tz,
> >> }
> >>
> >> static void update_instance_for_dethrottle(struct thermal_zone_device *tz,
> >> - int trip, enum thermal_trip_type trip_type)
> >> + int trip, enum thermal_trip_type trip_type,
> >> + enum thermal_trend trend)
> >> {
> >> struct thermal_instance *instance;
> >> struct thermal_cooling_device *cdev;
> >> @@ -101,7 +109,10 @@ static void update_instance_for_dethrottle(struct thermal_zone_device *tz,
> >> cdev = instance->cdev;
> >> cdev->ops->get_cur_state(cdev, &cur_state);
> >>
> >> - instance->target = cur_state > instance->lower ?
> >> + if (trend == THERMAL_TREND_DROP_FULL)
> >> + instance->target = instance->lower;
> >> + else
> >> + instance->target = cur_state > instance->lower ?
> >> (cur_state - 1) : THERMAL_NO_TARGET;
> >>
> > what do you expect to happen if the trend is THERMAL_TREND_RAISE_FULL at
> > this time?
> >
> Hi Rui,
>
> I suppose this is dethrotle routine and hence this will be called when
> only drop in temperature happens. Also I did not used get_target_state
> here because I thought it might cause regression in the other existing
> thermal drivers(I am not sure) But I guess calling get_target_state is
> the good way to know next target state and is fine if you agree.
> Also one suggestion, 2 functions for throttle/dethrottle can be merged
> as both look same and just get_target_state can be used in that
> function
>
agree.
patches have been refreshed, please review.
thanks,
rui
