On 22 November 2012 13:42, Zhang Rui <rui.zhang@xxxxxxxxx> wrote:
> 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, Your patches looks nice. I will re-base my patches against
your implementation and submit them shortly.
Thanks,
Amit D
>
> thanks,
> rui
>
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