linux-kernel - Re: [PATCH v2 4/4] thermal: of: Extend current of-thermal.c code to allow setting emulated temp

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Date:	Tue, 25 Nov 2014 16:44:03 -0400
From:	Eduardo Valentin <edubezval@...il.com>
To:	Lukasz Majewski <l.majewski@...sung.com>
Cc:	Zhang Rui <rui.zhang@...el.com>,
	Linux PM list <linux-pm@...r.kernel.org>,
	Thierry Reding <thierry.reding@...il.com>,
	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
	Lukasz Majewski <l.majewski@...ess.pl>,
	Mikko Perttunen <mperttunen@...dia.com>,
	Stephen Warren <swarren@...dotorg.org>,
	Abhilash Kesavan <kesavan.abhilash@...il.com>,
	Abhilash Kesavan <a.kesavan@...sung.com>,
	Guenter Roeck <linux@...ck-us.net>,
	linux-kernel@...r.kernel.org,
	Caesar Wang <caesar.wang@...k-chips.com>
Subject: Re: [PATCH v2 4/4] thermal: of: Extend current of-thermal.c code to
 allow setting emulated temp

On Thu, Nov 20, 2014 at 05:21:28PM +0100, Lukasz Majewski wrote:
> Before this change it was only possible to set get_temp() and get_trend()
> methods to be used in the common code handling passing parameters via
> device tree to "cpu-thermal" CPU thermal zone device.
> 
> Now it is possible to also set emulated value of temperature for debug
> purposes.
> 
> Signed-off-by: Lukasz Majewski <l.majewski@...sung.com>
> ---
> Changes for v2:
> - Rework the emulated temperature setting code to use of_thermal_sensor_ops
> structure
> ---
>  drivers/thermal/of-thermal.c | 24 ++++++++++++++++++++++++
>  include/linux/thermal.h      |  1 +
>  2 files changed, 25 insertions(+)
> 
> diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
> index 33921c5..ad7dc2b 100644
> --- a/drivers/thermal/of-thermal.c
> +++ b/drivers/thermal/of-thermal.c
> @@ -174,6 +174,28 @@ of_thermal_get_trip_points(struct thermal_zone_device *tz)
>  	return data->gtrips;
>  }
>  
> +/**
> + * of_thermal_set_emul_temp - function to set emulated temperature
> + *
> + * @tz:	pointer to a thermal zone
> + * @temp:	temperature to set
> + *
> + * This function gives the ability to set emulated value of temperature,
> + * which is handy for debugging
> + *
> + * Return: zero on success, error code otherwise
> + */
> +static int of_thermal_set_emul_temp(struct thermal_zone_device *tz,
> +				    unsigned long temp)
> +{
> +	struct __thermal_zone *data = tz->devdata;
> +
> +	if (!data->ops || !data->ops->set_emul_temp)
> +		return -EINVAL;
> +
> +	return data->ops->set_emul_temp(data->sensor_data, temp);
> +}
> +
>  static int of_thermal_get_trend(struct thermal_zone_device *tz, int trip,
>  				enum thermal_trend *trend)
>  {
> @@ -405,6 +427,7 @@ thermal_zone_of_add_sensor(struct device_node *zone,
>  
>  	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;
>  	mutex_unlock(&tzd->lock);
>  
>  	return tzd;
> @@ -533,6 +556,7 @@ void thermal_zone_of_sensor_unregister(struct device *dev,
>  	mutex_lock(&tzd->lock);
>  	tzd->ops->get_temp = NULL;
>  	tzd->ops->get_trend = NULL;
> +	tzd->ops->set_emul_temp = NULL;
>  
>  	tz->ops = NULL;
>  	tz->sensor_data = NULL;
> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
> index 88d7249..5eb9d44 100644
> --- a/include/linux/thermal.h
> +++ b/include/linux/thermal.h
> @@ -301,6 +301,7 @@ struct thermal_genl_event {
>  struct thermal_zone_of_device_ops {
>  	int (*get_temp)(void *, long *);
>  	int (*get_trend)(void *, long *);
> +	int (*set_emul_temp)(void *, unsigned long);

Please add it in the list of Optional functions in the comment above
this struct.

Apart from that:


Acked-by: Eduardo Valentin <edubezval@...il.com>


>  };
>  
>  /**
> -- 
> 2.0.0.rc2
> 

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