linux-kernel - Re: [PATCH 2/5 RESEND] thermal: exynos: Miscellaneous fixes to support falling threshold interrupt

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Date:	Tue, 8 Jan 2013 20:30:55 -0800
From:	amit kachhap <amit.kachhap@...il.com>
To:	Joe Perches <joe@...ches.com>
Cc:	linux-pm@...ts.linux-foundation.org, linux-pm@...r.kernel.org,
	Zhang Rui <rui.zhang@...el.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/5 RESEND] thermal: exynos: Miscellaneous fixes to
 support falling threshold interrupt

Hi Joe,

Thanks for the review. Will re-post with your suggestion,

On Sun, Jan 6, 2013 at 3:55 PM, Joe Perches <joe@...ches.com> wrote:
> On Sun, 2013-01-06 at 15:50 -0800, Amit Daniel Kachhap wrote:
>> Below fixes are done to support falling threshold interrupt,
>> * Falling interrupt status macro corrected according to exynos5 data sheet.
>> * The get trend function modified to calculate trip temperature correctly.
>> * The clearing of interrupt status in the isr is now done after handling
>>   the event that caused the interrupt.
> []
>> diff --git a/drivers/thermal/exynos_thermal.c b/drivers/thermal/exynos_thermal.c
> []
>> @@ -373,12 +373,19 @@ static int exynos_get_temp(struct thermal_zone_device *thermal,
>>  static int exynos_get_trend(struct thermal_zone_device *thermal,
>>                       int trip, enum thermal_trend *trend)
>>  {
>> -     if (thermal->temperature >= trip)
>> +     int ret = 0;
Yes agreed. Will modify it.
>
> Unnecessary initialization
>
>> +     unsigned long trip_temp;
>> +
>> +     ret = exynos_get_trip_temp(thermal, trip, &trip_temp);
>> +     if (ret < 0)
>> +             return ret;
>> +
>> +     if (thermal->temperature >= trip_temp)
>>               *trend = THERMAL_TREND_RAISING;
>>       else
>>               *trend = THERMAL_TREND_DROPPING;
>
> THERMAL_TREND_STABLE ?
Only 2 trend is sufficient. It is stable for some time as the falling
threshold interrupt is some units below the trip temp.
>
>>
>> -     return 0;
>> +     return ret;
Ok agreed
>
> return 0 is clearer.
>
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