Re: [PATCH 09/13] thermal: of: always set sensor related callbacks

Eduardo Valentin
2015-04-07T03:25:20Z

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On Thu, Mar 26, 2015 at 04:53:56PM +0100, Sascha Hauer wrote:
> Now that the thermal core treats -ENOSYS like the callbacks were
> not present at all we no longer have to overwrite the ops during
> runtime but instead can always set them and return -ENOSYS if no
> sensor is registered.
>
> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
> ---
> drivers/thermal/of-thermal.c | 18 +++++++++++-------
> 1 file changed, 11 insertions(+), 7 deletions(-)
>
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index b39e22f..df14fdd 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -91,7 +91,7 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
> {
> struct __thermal_zone *data = tz->devdata;
>
> - if (!data->ops->get_temp)
> + if (!data->ops)
> return -EINVAL;
>
> return data->ops->get_temp(data->sensor_data, temp);
> @@ -178,7 +178,7 @@ static int of_thermal_set_emul_temp(struct thermal_zone_device *tz,
> struct __thermal_zone *data = tz->devdata;
>
> if (!data->ops || !data->ops->set_emul_temp)
> - return -EINVAL;
> + return -ENOSYS;
>
> return data->ops->set_emul_temp(data->sensor_data, temp);
> }
> @@ -189,8 +189,8 @@ static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
> struct __thermal_zone *data = tz->devdata;
> int r;
>
> - if (!data->ops->get_trend)
> - return -EINVAL;
> + if (!data->ops || !data->ops->get_trend)
> + return -ENOSYS;
>
> r = data->ops->get_trend(data->sensor_data, trip, trend);
> if (r)
> @@ -366,6 +366,10 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
> }
>
> static struct thermal_zone_device_ops of_thermal_ops = {
> + .get_temp = of_thermal_get_temp,
> + .get_trend = of_thermal_get_trend,
> + .set_emul_temp = of_thermal_set_emul_temp,
> +
> .get_mode = of_thermal_get_mode,
> .set_mode = of_thermal_set_mode,
>
> @@ -399,13 +403,13 @@ thermal_zone_of_add_sensor(struct device_node *zone,
> if (!ops)
> return ERR_PTR(-EINVAL);
>
> + if (!ops->get_temp)
> + return ERR_PTR(-EINVAL);
> +
> mutex_lock(&tzd->lock);
> tz->ops = ops;
> tz->sensor_data = data;
>
> - tzd->ops->get_temp = of_thermal_get_temp;
> - tzd->ops->get_trend = of_thermal_get_trend;
> - tzd->ops->set_emul_temp = of_thermal_set_emul_temp;

You may want to update the thermal_zone_of_sensor_unregister too.

> mutex_unlock(&tzd->lock);
>
> return tzd;
> --
> 2.1.4
>

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