linux-kernel - Re: [PATCHv3 2/3] thermal: expose thermal_zone_get

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Message-ID: <516EF3AE.1090200@ti.com>
Date:	Wed, 17 Apr 2013 15:10:38 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	Eduardo Valentin <eduardo.valentin@...com>
CC:	Zhang Rui <rui.zhang@...el.com>, <linux-pm@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <durgadoss.r@...el.com>
Subject: Re: [PATCHv3 2/3] thermal: expose thermal_zone_get_temp API

On 15-04-2013 09:22, Eduardo Valentin wrote:
> On 14-04-2013 21:43, Zhang Rui wrote:
>> On Fri, 2013-04-05 at 08:32 -0400, Eduardo Valentin wrote:
>>> This patch exports the thermal_zone_get_temp API so that driver
>>> writers can fetch temperature of thermal zones managed by other
>>> drivers.
>>>
>>> Acked-by: Durgadoss R <durgadoss.r@...el.com>
>>> Signed-off-by: Eduardo Valentin <eduardo.valentin@...com>
>>
>> refreshed the patch to modify drivers/thermal/thermal_core.c instead of
>> drivers/thermal/thermal_sys.c and applied to thermal -next.
>
> Thanks!


Just a gentle reminder, this one does not seam to be applied to 
thermal/next.
>
>>
>> thanks,
>> rui
>>
>>> ---
>>>   drivers/thermal/thermal_sys.c |   20 +++++++++++++++++---
>>>   include/linux/thermal.h       |    1 +
>>>   2 files changed, 18 insertions(+), 3 deletions(-)
>>>
>>> diff --git a/drivers/thermal/thermal_sys.c
>>> b/drivers/thermal/thermal_sys.c
>>> index e9b636b..83bfa0d 100644
>>> --- a/drivers/thermal/thermal_sys.c
>>> +++ b/drivers/thermal/thermal_sys.c
>>> @@ -371,16 +371,28 @@ static void handle_thermal_trip(struct
>>> thermal_zone_device *tz, int trip)
>>>       monitor_thermal_zone(tz);
>>>   }
>>>
>>> -static int thermal_zone_get_temp(struct thermal_zone_device *tz,
>>> -                unsigned long *temp)
>>> +/**
>>> + * thermal_zone_get_temp() - returns its the temperature of thermal
>>> zone
>>> + * @tz: a valid pointer to a struct thermal_zone_device
>>> + * @temp: a valid pointer to where to store the resulting temperature.
>>> + *
>>> + * When a valid thermal zone reference is passed, it will fetch its
>>> + * temperature and fill @temp.
>>> + *
>>> + * Return: On success returns 0, an error code otherwise
>>> + */
>>> +int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned
>>> long *temp)
>>>   {
>>> -    int ret = 0;
>>> +    int ret = -EINVAL;
>>>   #ifdef CONFIG_THERMAL_EMULATION
>>>       int count;
>>>       unsigned long crit_temp = -1UL;
>>>       enum thermal_trip_type type;
>>>   #endif
>>>
>>> +    if (IS_ERR_OR_NULL(tz))
>>> +        goto exit;
>>> +
>>>       mutex_lock(&tz->lock);
>>>
>>>       ret = tz->ops->get_temp(tz, temp);
>>> @@ -404,8 +416,10 @@ static int thermal_zone_get_temp(struct
>>> thermal_zone_device *tz,
>>>   skip_emul:
>>>   #endif
>>>       mutex_unlock(&tz->lock);
>>> +exit:
>>>       return ret;
>>>   }
>>> +EXPORT_SYMBOL_GPL(thermal_zone_get_temp);
>>>
>>>   static void update_temperature(struct thermal_zone_device *tz)
>>>   {
>>> diff --git a/include/linux/thermal.h b/include/linux/thermal.h
>>> index 0cf9eb5..8eea86c 100644
>>> --- a/include/linux/thermal.h
>>> +++ b/include/linux/thermal.h
>>> @@ -238,6 +238,7 @@ struct thermal_cooling_device
>>> *thermal_cooling_device_register(char *, void *,
>>>           const struct thermal_cooling_device_ops *);
>>>   void thermal_cooling_device_unregister(struct
>>> thermal_cooling_device *);
>>>   struct thermal_zone_device *thermal_zone_get_zone_by_name(const
>>> char *name);
>>> +int thermal_zone_get_temp(struct thermal_zone_device *tz, unsigned
>>> long *temp);
>>>
>>>   int thermal_zone_trend_get(struct thermal_zone_device *, int);
>>>   struct thermal_instance *thermal_instance_get(struct
>>> thermal_zone_device *,
>>
>>
>>
>>
>
>
>

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