[v3,3/4] thermal: of: enable temperature notifications

* Add a state variable to track if trip point is triggered.
* Enable trip events only when the state of the tirp point changes.
* Implement the get\set callbacks for trip state.

Change-Id: I1bd6a7b0e5e520d8ee678b83111d23cada7a580c
Signed-off-by: Srikar Srimath Tirumala <srikars@nvidia.com>
---
 drivers/thermal/of-thermal.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)

Looks good to me.

On 03/29/2016 05:41 PM, Srikar Srimath Tirumala wrote:
> * Add a state variable to track if trip point is triggered.
> * Enable trip events only when the state of the tirp point changes.
> * Implement the get\set callbacks for trip state.
>
> Change-Id: I1bd6a7b0e5e520d8ee678b83111d23cada7a580c
> Signed-off-by: Srikar Srimath Tirumala <srikars@nvidia.com>
> ---
>   drivers/thermal/of-thermal.c | 43 +++++++++++++++++++++++++++++++++++++++++++
>   1 file changed, 43 insertions(+)
>
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index 49ac23d..f6d9d3d 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -379,6 +379,43 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
>   	return -EINVAL;
>   }
>   
> +static bool of_thermal_enb_temp_notify(struct thermal_zone_device *tz, int trip)
> +{
> +	bool ret = true;
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (trip >= data->ntrips || trip < 0)
> +		ret = false;
> +
> +	return ret;
> +}
> +
> +static int of_thermal_get_trip_state(struct thermal_zone_device *tz, int trip,
> +				     enum thermal_trip_state *state)
> +{
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (trip >= data->ntrips || trip < 0)
> +		return -EDOM;
> +
> +	*state = data->trips[trip].state;
> +
> +	return 0;
> +}
> +
> +static int of_thermal_set_trip_state(struct thermal_zone_device *tz, int trip,
> +				     enum thermal_trip_state state)
> +{
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (trip >= data->ntrips || trip < 0)
> +		return -EDOM;
> +
> +	data->trips[trip].state = state;
> +
> +	return 0;
> +}
> +
>   static struct thermal_zone_device_ops of_thermal_ops = {
>   	.get_mode = of_thermal_get_mode,
>   	.set_mode = of_thermal_set_mode,
> @@ -392,6 +429,10 @@ static struct thermal_zone_device_ops of_thermal_ops = {
>   
>   	.bind = of_thermal_bind,
>   	.unbind = of_thermal_unbind,
> +
> +	.get_trip_state = of_thermal_get_trip_state,
> +	.set_trip_state = of_thermal_set_trip_state,
> +	.enb_temp_notify = of_thermal_enb_temp_notify,
>   };
>   
>   /***   sensor API   ***/
> @@ -782,6 +823,8 @@ static int thermal_of_populate_trip(struct device_node *np,
>   		return ret;
>   	}
>   
> +	trip->state = THERMAL_TRIP_NOT_TRIPPED;
> +
>   	/* Required for cooling map matching */
>   	trip->np = np;
>   	of_node_get(np);

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On Tue, Mar 29, 2016 at 05:41:36PM -0700, Srikar Srimath Tirumala wrote:
> * Add a state variable to track if trip point is triggered.
> * Enable trip events only when the state of the tirp point changes.
> * Implement the get\set callbacks for trip state.
> 
> Change-Id: I1bd6a7b0e5e520d8ee678b83111d23cada7a580c
> Signed-off-by: Srikar Srimath Tirumala <srikars@nvidia.com>
> ---
>  drivers/thermal/of-thermal.c | 43 +++++++++++++++++++++++++++++++++++++++++++
>  1 file changed, 43 insertions(+)
> 
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index 49ac23d..f6d9d3d 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -379,6 +379,43 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
>  	return -EINVAL;
>  }
>  
> +static bool of_thermal_enb_temp_notify(struct thermal_zone_device *tz, int trip)
> +{
> +	bool ret = true;
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (trip >= data->ntrips || trip < 0)
> +		ret = false;
> +
> +	return ret;
> +}
> +
> +static int of_thermal_get_trip_state(struct thermal_zone_device *tz, int trip,
> +				     enum thermal_trip_state *state)
> +{
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (trip >= data->ntrips || trip < 0)
> +		return -EDOM;
> +
> +	*state = data->trips[trip].state;

For the sake of the current implementation, I believe tracking state is probably
more of a thermal core duty. Not sure this has anything to do with OF
thermal.


Could you please clarify why you think this has to be here?

> +
> +	return 0;
> +}
> +
> +static int of_thermal_set_trip_state(struct thermal_zone_device *tz, int trip,
> +				     enum thermal_trip_state state)
> +{
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (trip >= data->ntrips || trip < 0)
> +		return -EDOM;
> +
> +	data->trips[trip].state = state;
> +
> +	return 0;
> +}
> +
>  static struct thermal_zone_device_ops of_thermal_ops = {
>  	.get_mode = of_thermal_get_mode,
>  	.set_mode = of_thermal_set_mode,
> @@ -392,6 +429,10 @@ static struct thermal_zone_device_ops of_thermal_ops = {
>  
>  	.bind = of_thermal_bind,
>  	.unbind = of_thermal_unbind,
> +
> +	.get_trip_state = of_thermal_get_trip_state,
> +	.set_trip_state = of_thermal_set_trip_state,
> +	.enb_temp_notify = of_thermal_enb_temp_notify,
>  };
>  
>  /***   sensor API   ***/
> @@ -782,6 +823,8 @@ static int thermal_of_populate_trip(struct device_node *np,
>  		return ret;
>  	}
>  
> +	trip->state = THERMAL_TRIP_NOT_TRIPPED;
> +
>  	/* Required for cooling map matching */
>  	trip->np = np;
>  	of_node_get(np);
> -- 
> 2.1.4
> 
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