linux-kernel - Re: [PATCH V3 10/21] thermal: exynos: Fix to clear only the generated interrupts

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Message-ID: <CADGdYn7Hm6EXvgK_ih_T8eE1oxzeiHimpZJ2LvQvCvC=ycmddg@mail.gmail.com>
Date:	Fri, 10 May 2013 07:52:18 +0530
From:	amit daniel kachhap <amit.daniel@...sung.com>
To:	Eduardo Valentin <eduardo.valentin@...com>
Cc:	linux-pm@...r.kernel.org, Zhang Rui <rui.zhang@...el.com>,
	linux-samsung-soc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Kukjin Kim <kgene.kim@...sung.com>
Subject: Re: [PATCH V3 10/21] thermal: exynos: Fix to clear only the generated interrupts

Hi,

On Thu, May 9, 2013 at 8:03 PM, Eduardo Valentin
<eduardo.valentin@...com> wrote:
> On 07-05-2013 09:01, Amit Daniel Kachhap wrote:
>> This patch uses the TMU status register to know the generated interrupts
>> and only clear them in the interrupt handler.
>>
>> Acked-by: Kukjin Kim <kgene.kim@...sung.com>
>> Signed-off-by: Amit Daniel Kachhap <amit.daniel@...sung.com>
>> ---
>>  drivers/thermal/samsung/exynos_tmu.c      |   10 ++++------
>>  drivers/thermal/samsung/exynos_tmu_data.c |    2 ++
>>  2 files changed, 6 insertions(+), 6 deletions(-)
>>
>> diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
>> index 97b87aa..082d5a2 100644
>> --- a/drivers/thermal/samsung/exynos_tmu.c
>> +++ b/drivers/thermal/samsung/exynos_tmu.c
>> @@ -325,17 +325,15 @@ static void exynos_tmu_work(struct work_struct *work)
>>                       struct exynos_tmu_data, irq_work);
>>       struct exynos_tmu_platform_data *pdata = data->pdata;
>>       struct exynos_tmu_registers *reg = pdata->registers;
>> +     unsigned int val_irq;
>>
>>       exynos_report_trigger();
>>       mutex_lock(&data->lock);
>>       clk_enable(data->clk);
>>
>> -     if (data->soc == SOC_ARCH_EXYNOS)
>> -             writel((reg->inten_rise_mask << reg->inten_rise_shift) |
>> -                     (reg->inten_fall_mask << reg->inten_fall_shift),
>> -                             data->base + reg->tmu_intclear);
>> -     else
>> -             writel(reg->inten_rise_mask, data->base + reg->tmu_intclear);
>> +     val_irq = readl(data->base + reg->tmu_intstat);
>> +     /* clear the interrupts */
>> +     writel(val_irq, data->base + reg->tmu_intclear);
>>
>
> hmmm.. Don t you need to act accordingly depending on what is in your
> int status?

Earlier also it is done like this way. Basically core thermal layer
checks temp for each trip so even if I check for which threshold
interrupt is raised it is of no use. Anyway this is a TODO for me.

Thanks,
Amit Daniel
>
>>       clk_disable(data->clk);
>>       mutex_unlock(&data->lock);
>> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
>> index 3a1ded1..7322597 100644
>> --- a/drivers/thermal/samsung/exynos_tmu_data.c
>> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
>> @@ -45,6 +45,7 @@ static struct exynos_tmu_registers exynos4210_tmu_registers = {
>>       .inten_rise1_shift = EXYNOS_TMU_INTEN_RISE1_SHIFT,
>>       .inten_rise2_shift = EXYNOS_TMU_INTEN_RISE2_SHIFT,
>>       .inten_rise3_shift = EXYNOS_TMU_INTEN_RISE3_SHIFT,
>> +     .tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
>>       .tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
>>  };
>>  struct exynos_tmu_platform_data const exynos4210_default_tmu_data = {
>> @@ -111,6 +112,7 @@ static struct exynos_tmu_registers exynos5250_tmu_registers = {
>>       .inten_rise2_shift = EXYNOS_TMU_INTEN_RISE2_SHIFT,
>>       .inten_rise3_shift = EXYNOS_TMU_INTEN_RISE3_SHIFT,
>>       .inten_fall0_shift = EXYNOS_TMU_INTEN_FALL0_SHIFT,
>> +     .tmu_intstat = EXYNOS_TMU_REG_INTSTAT,
>>       .tmu_intclear = EXYNOS_TMU_REG_INTCLEAR,
>>       .emul_con = EXYNOS_EMUL_CON,
>>       .emul_temp_shift = EXYNOS_EMUL_DATA_SHIFT,
>>
>
>
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