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
Thanks,
Amit Daniel
> thanks,
> rui
>
