linux-kernel - RE: [PATCH 2/3] Thermal: core: Modify temp_crit

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Message-ID: <744357E9AAD1214791ACBA4B0B9092630110240D@SHSMSX101.ccr.corp.intel.com>
Date:	Mon, 20 May 2013 15:57:45 +0000
From:	"Zhang, Rui" <rui.zhang@...el.com>
To:	Jonghwa Lee <jonghwa3.lee@...sung.com>,
	"linux-pm@...r.kernel.org" <linux-pm@...r.kernel.org>
CC:	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Eduardo Valentin" <eduardo.valentin@...com>,
	Amit Dinel Kachhap <amit.kachhap@...aro.org>,
	MyungJoo Ham <myungjoo.ham@...sung.com>
Subject: RE: [PATCH 2/3] Thermal: core: Modify temp_crit_show() to use
 proper callback function.



> -----Original Message-----
> From: Jonghwa Lee [mailto:jonghwa3.lee@...sung.com]
> Sent: Saturday, May 18, 2013 5:51 PM
> To: linux-pm@...r.kernel.org
> Cc: linux-kernel@...r.kernel.org; Zhang, Rui; Eduardo Valentin; Amit
> Dinel Kachhap; Jonghwa Lee; MyungJoo Ham
> Subject: [PATCH 2/3] Thermal: core: Modify temp_crit_show() to use
> proper callback function.
> Importance: High
> 
> This patch modifies temp_crit_show() which is used to create hwmon's
> sysfs node to use .get_crit_temp callback function of thermal zone
> device rather than .get_trip_temp.
> 
> Signed-off-by: Jonghwa Lee <jonghwa3.lee@...sung.com>
> Signed-off-by: MyungJoo Ham <myungjoo.ham@...sung.com>

The problem is that .get_crit_temp is optional for thermal drivers
that has a critical trip point.
At least we do not have such kind of check in thermal core.
Take rcar_thermal driver for example,
It supports critical trip point but it does not have .get_crit_type.

So I'd like to see a fix in rcar thermal driver and thermal core
for this issue, together with this patch.

Thanks,
rui
> ---
>  drivers/thermal/thermal_core.c |    2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/thermal/thermal_core.c
> b/drivers/thermal/thermal_core.c index f753f48..ce4384a 100644
> --- a/drivers/thermal/thermal_core.c
> +++ b/drivers/thermal/thermal_core.c
> @@ -924,7 +924,7 @@ temp_crit_show(struct device *dev, struct
> device_attribute *attr,
>  	long temperature;
>  	int ret;
> 
> -	ret = tz->ops->get_trip_temp(tz, 0, &temperature);
> +	ret = tz->ops->get_crit_temp(tz, &temperature);
>  	if (ret)
>  		return ret;
> 
> --
> 1.7.9.5

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