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

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Date:	Thu, 9 May 2013 10:33:59 -0400
From:	Eduardo Valentin <eduardo.valentin@...com>
To:	Amit Daniel Kachhap <amit.daniel@...sung.com>
CC:	<linux-pm@...r.kernel.org>, Zhang Rui <rui.zhang@...el.com>,
	<linux-samsung-soc@...r.kernel.org>,
	<linux-kernel@...r.kernel.org>, <amit.kachhap@...il.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Eduardo Valentin <eduardo.valentin@...com>
Subject: Re: [PATCH V3 10/21] thermal: exynos: Fix to clear only the generated
 interrupts

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?

>  	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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