linux-kernel - Re: [PATCH] thermal: samsung: Exynos5260 and Exynos5420 should not use TRIM

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Date:	Wed, 20 Aug 2014 09:24:57 -0400
From:	Eduardo Valentin <edubezval@...il.com>
To:	Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
Cc:	Kyungmin Park <kyungmin.park@...sung.com>,
	linux-samsung-soc@...r.kernel.org, linux-pm@...r.kernel.org,
	linux-kernel@...r.kernel.org, Chanwoo Choi <cw00.choi@...sung.com>,
	Naveen Krishna Chatradhi <ch.naveen@...sung.com>,
	Amit Daniel Kachhap <amit.daniel@...sung.com>,
	Zhang Rui <rui.zhang@...el.com>
Subject: Re: [PATCH] thermal: samsung: Exynos5260 and Exynos5420 should not
 use TRIM_RELOAD flag

Hello Bartlomiej,

On Wed, Aug 20, 2014 at 02:04:18PM +0200, Bartlomiej Zolnierkiewicz wrote:
> Currently these SoCs claim TRIM_RELOAD support but don't have
> triminfo_ctrl register address defined in their struct
> exynos_tmu_registers entries.  This causes incorrect write of
> value "1" to data->base + 0x00 address (which happens to be
> TRIMINFO register).  Fix it by removing TMU_SUPPORT_TRIM_RELOAD
> flag for Exynos5260 and Exynos5420

Do the Exynos5260 and Exynos5420 hardwares support TRIM_RELOAD?

Based on the above description, you state that they lack the definition
in their struct exynos_tmu_register. But that does not mean necessarily
that they do not support it right?

If they support the TRIM_RELOAD feature, then please add the proper
triminfo_ctrl entry in their exynos_tmu_registers.

But If they do not support TRIM_RELOAD, please, keep the changes below,
but improve the commit message, simply stating that these SoC do not
support TRIM_RELOAD.

> 
> Cc: Naveen Krishna Chatradhi <ch.naveen@...sung.com>
> Cc: Chanwoo Choi <cw00.choi@...sung.com>
> Cc: Amit Daniel Kachhap <amit.daniel@...sung.com>
> Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>
> Acked-by: Kyungmin Park <kyungmin.park@...sung.com>
> ---
>  drivers/thermal/samsung/exynos_tmu_data.c | 16 +++++++---------
>  1 file changed, 7 insertions(+), 9 deletions(-)
> 
> diff --git a/drivers/thermal/samsung/exynos_tmu_data.c b/drivers/thermal/samsung/exynos_tmu_data.c
> index aa8e0de..8c0ada2 100644
> --- a/drivers/thermal/samsung/exynos_tmu_data.c
> +++ b/drivers/thermal/samsung/exynos_tmu_data.c
> @@ -359,9 +359,8 @@ static const struct exynos_tmu_registers exynos5260_tmu_registers = {
>  #define EXYNOS5260_TMU_DATA \
>  	__EXYNOS5260_TMU_DATA \
>  	.type = SOC_ARCH_EXYNOS5260, \
> -	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> -			TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> -			TMU_SUPPORT_EMUL_TIME)
> +	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_FALLING_TRIP | \
> +			TMU_SUPPORT_READY_STATUS | TMU_SUPPORT_EMUL_TIME)
>  
>  struct exynos_tmu_init_data const exynos5260_default_tmu_data = {
>  	.tmu_data = {
> @@ -451,16 +450,15 @@ static const struct exynos_tmu_registers exynos5420_tmu_registers = {
>  #define EXYNOS5420_TMU_DATA \
>  	__EXYNOS5420_TMU_DATA \
>  	.type = SOC_ARCH_EXYNOS5250, \
> -	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> -			TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> -			TMU_SUPPORT_EMUL_TIME)
> +	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_FALLING_TRIP | \
> +			TMU_SUPPORT_READY_STATUS | TMU_SUPPORT_EMUL_TIME)
>  
>  #define EXYNOS5420_TMU_DATA_SHARED \
>  	__EXYNOS5420_TMU_DATA \
>  	.type = SOC_ARCH_EXYNOS5420_TRIMINFO, \
> -	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_TRIM_RELOAD | \
> -			TMU_SUPPORT_FALLING_TRIP | TMU_SUPPORT_READY_STATUS | \
> -			TMU_SUPPORT_EMUL_TIME | TMU_SUPPORT_ADDRESS_MULTIPLE)
> +	.features = (TMU_SUPPORT_EMULATION | TMU_SUPPORT_FALLING_TRIP | \
> +			TMU_SUPPORT_READY_STATUS | TMU_SUPPORT_EMUL_TIME | \
> +			TMU_SUPPORT_ADDRESS_MULTIPLE)
>  
>  struct exynos_tmu_init_data const exynos5420_default_tmu_data = {
>  	.tmu_data = {
> -- 
> 1.8.2.3
> 
> 
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