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:	Wed, 26 Nov 2014 09:47:33 +0100
From:	Lukasz Majewski <l.majewski@...sung.com>
To:	Eduardo Valentin <edubezval@...il.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

Hi Eduardo,

> 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.

I will add proper comment to struct thermal_zone_of_device_ops comment.

> 
> Apart from that:
> 
> 
> Acked-by: Eduardo Valentin <edubezval@...il.com>
> 
> 
> >  };
> >  
> >  /**
> > -- 
> > 2.0.0.rc2
> > 



-- 
Best regards,

Lukasz Majewski

Samsung R&D Institute Poland (SRPOL) | Linux Platform Group
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