linux-kernel - Re: [PATCH 12/15] thermal: of: implement .set

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Message-ID: <5559AC33.10604@kapsi.fi>
Date:	Mon, 18 May 2015 12:09:07 +0300
From:	Mikko Perttunen <mikko.perttunen@...si.fi>
To:	Sascha Hauer <s.hauer@...gutronix.de>, linux-pm@...r.kernel.org
CC:	Zhang Rui <rui.zhang@...el.com>,
	Eduardo Valentin <edubezval@...il.com>,
	linux-kernel@...r.kernel.org,
	Stephen Warren <swarren@...dotorg.org>, kernel@...gutronix.de,
	linux-mediatek@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	Brian Norris <computersforpeace@...il.com>
Subject: Re: [PATCH 12/15] thermal: of: implement .set_trips for device tree
 thermal zones

On 05/13/15 11:52, Sascha Hauer wrote:
> Signed-off-by: Sascha Hauer <s.hauer@...gutronix.de>
> ---
>   drivers/thermal/of-thermal.c | 12 ++++++++++++
>   include/linux/thermal.h      |  3 +++
>   2 files changed, 15 insertions(+)
>
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index bd3185e..f8dd847 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -97,6 +97,17 @@ static int of_thermal_get_temp(struct thermal_zone_device *tz,
>   	return data->ops->get_temp(data->sensor_data, temp);
>   }
>
> +static int of_thermal_set_trips(struct thermal_zone_device *tz,
> +			       int low, int high)
> +{
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (!data->ops || !data->ops->set_trips)
> +		return -ENOSYS;
> +
> +	return data->ops->set_trips(data->sensor_data, low, high);
> +}
> +
>   /**
>    * of_thermal_get_ntrips - function to export number of available trip
>    *			   points.
> @@ -367,6 +378,7 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
>
>   static const struct thermal_zone_device_ops of_thermal_ops = {
>   	.get_temp = of_thermal_get_temp,
> +	.set_trips = of_thermal_set_trips,
>   	.get_trend = of_thermal_get_trend,
>   	.set_emul_temp = of_thermal_set_emul_temp,
>
> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> index aef6e13..b751f6b 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -267,12 +267,15 @@ struct thermal_genl_event {
>    *
>    * Optional:
>    * @get_trend: a pointer to a function that reads the sensor temperature trend.
> + * @set_trips: a pointer to a function that sets a temperature window which shall
> + *             trigger an interrupt when it is left.

Perhaps this documentation should be expanded a little; the commit 
message in the previous patch looked pretty good. The fact that the 
driver needs to call thermal_zone_device_update should be mentioned 
somewhere.

>    * @set_emul_temp: a pointer to a function that sets sensor emulated
>    *		   temperature.
>    */
>   struct thermal_zone_of_device_ops {
>   	int (*get_temp)(void *, int *);
>   	int (*get_trend)(void *, int, enum thermal_trend *);
> +	int (*set_trips)(void *, int, int);
>   	int (*set_emul_temp)(void *, int);
>   };
>
>

Thanks,
Mikko.
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