Re: [PATCH 06/13] thermal: streamline get_trend callbacks

[Eduardo Valentin]

On Thu, Mar 26, 2015 at 04:53:53PM +0100, Sascha Hauer wrote:
> The .get_trend callback in struct thermal_zone_device_ops has the prototype:
> 
> 	int (*get_trend) (struct thermal_zone_device *, int,
> 			  enum thermal_trend *);
> 
> whereas the .get_trend callback in struct thermal_zone_of_device_ops has:
> 
> 	int (*get_trend)(void *, long *);
> 
> Streamline both prototypes and add the trip argument to the OF callback
> aswell and use enum thermal_trend * instead of an integer pointer.
> 
> While the OF prototype may be the better one, this should be decided at
> framework level and not on OF level.
> 
> Signed-off-by: Sascha Hauer <s.hauer@xxxxxxxxxxxxxx>
> ---
>  drivers/thermal/of-thermal.c                       | 11 +---------
>  drivers/thermal/ti-soc-thermal/ti-thermal-common.c | 25 +++++++---------------
>  include/linux/thermal.h                            |  2 +-
>  3 files changed, 10 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index 668fb1b..b39e22f 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -187,24 +187,15 @@ static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
>  				enum thermal_trend *trend)
>  {
>  	struct __thermal_zone *data = tz->devdata;
> -	long dev_trend;
>  	int r;
>  
>  	if (!data->ops->get_trend)
>  		return -EINVAL;
>  
> -	r = data->ops->get_trend(data->sensor_data, &dev_trend);
> +	r = data->ops->get_trend(data->sensor_data, trip, trend);
>  	if (r)
>  		return r;
>  
> -	/* TODO: These intervals might have some thresholds, but in core code */
> -	if (dev_trend > 0)
> -		*trend = THERMAL_TREND_RAISING;
> -	else if (dev_trend < 0)
> -		*trend = THERMAL_TREND_DROPPING;
> -	else
> -		*trend = THERMAL_TREND_STABLE;
> -
>  	return 0;
>  }
>  
> diff --git a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
> index a38c175..7f8e5f3 100644
> --- a/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
> +++ b/drivers/thermal/ti-soc-thermal/ti-thermal-common.c
> @@ -238,7 +238,7 @@ static int ti_thermal_get_trip_temp(struct thermal_zone_device *thermal,
>  	return 0;
>  }
>  
> -static int __ti_thermal_get_trend(void *p, long *trend)
> +static int __ti_thermal_get_trend(void *p, int trip, enum thermal_trend *trend)
>  {
>  	struct ti_thermal_data *data = p;
>  	struct ti_bandgap *bgp;
> @@ -251,22 +251,6 @@ static int __ti_thermal_get_trend(void *p, long *trend)
>  	if (ret)
>  		return ret;
>  
> -	*trend = tr;
> -
> -	return 0;
> -}
> -
> -/* Get the temperature trend callback functions for thermal zone */
> -static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
> -				int trip, enum thermal_trend *trend)
> -{
> -	int ret;
> -	long tr;
> -
> -	ret = __ti_thermal_get_trend(thermal->devdata, &tr);
> -	if (ret)
> -		return ret;
> -
>  	if (tr > 0)
>  		*trend = THERMAL_TREND_RAISING;
>  	else if (tr < 0)
> @@ -277,6 +261,13 @@ static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
>  	return 0;
>  }
>  
> +/* Get the temperature trend callback functions for thermal zone */
> +static int ti_thermal_get_trend(struct thermal_zone_device *thermal,
> +				int trip, enum thermal_trend *trend)
> +{
> +	return __ti_thermal_get_trend(thermal->devdata, trip, trend);
> +}
> +
>  /* Get critical temperature callback functions for thermal zone */
>  static int ti_thermal_get_crit_temp(struct thermal_zone_device *thermal,
>  				    unsigned long *temp)
> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> index db6c12b..ba2e29a 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -273,7 +273,7 @@ struct thermal_genl_event {
>   */
>  struct thermal_zone_of_device_ops {
>  	int (*get_temp)(void *, long *);
> -	int (*get_trend)(void *, long *);
> +	int (*get_trend)(void *, int trend, enum thermal_trend *);

Could you please keep the kernel doc entry up to date?


Apart from that, looks good to me.

>  	int (*set_emul_temp)(void *, unsigned long);
>  };
>  
> -- 
> 2.1.4
>

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