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

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Date:	Fri, 10 May 2013 11:40:57 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	amit daniel kachhap <amit.daniel@...sung.com>
CC:	Eduardo Valentin <eduardo.valentin@...com>,
	<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

On 09-05-2013 22:22, amit daniel kachhap wrote:
> 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.
> 

Please add  a /* TODO: */ entry then.

> 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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