[PATCH 2/5] ARM: SAMSUNG: Make the sleep code common for S3C64XX and newer SoCs

From: kesavan.abhilash@gmail.com (Abhilash Kesavan)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/5] ARM: SAMSUNG: Make the sleep code common for S3C64XX and newer SoCs
Date: Fri, 26 Aug 2011 07:40:31 +0530	[thread overview]
Message-ID: <CAM4voak5ArO4YW-bfLDoUFtMndV58thnr2Z4oCbPhD3fRPS1Cw@mail.gmail.com> (raw)
In-Reply-To: <073501cc6391$31569f70$9403de50$%kim@samsung.com>

Hi Mr Kim,

Thanks for your comments. Please find my reply below:

Regards,
Abhilash

On Fri, Aug 26, 2011 at 7:10 AM, Kukjin Kim <kgene.kim@samsung.com> wrote:
> Abhilash Kesavan wrote:
>>
>> The sleep code for S5PV210 and EXYNOS4 is identical; moreover it is quite
>> similar
>> to that for S3C64XX except for some SoC specific debug logic. S5P64X0 and
>> S5PC100,
>> for which support will be added soon, can also use the same procedure.
> Create a
>> common sleep code in the plat-samsung directory so that it can be re-used.
>>
>> Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com>
>> ---
>> ?arch/arm/mach-exynos4/Kconfig ?| ? ?1 +
>> ?arch/arm/mach-exynos4/Makefile | ? ?2 +-
>> ?arch/arm/mach-exynos4/sleep.S ?| ? 54 ---------------------------
>> ?arch/arm/mach-s3c64xx/Kconfig ?| ? ?1 +
>> ?arch/arm/mach-s3c64xx/Makefile | ? ?1 -
>> ?arch/arm/mach-s3c64xx/sleep.S ?| ? 72
> ------------------------------------
>> ?arch/arm/mach-s5pv210/Kconfig ?| ? ?1 +
>> ?arch/arm/mach-s5pv210/Makefile | ? ?2 +-
>> ?arch/arm/mach-s5pv210/sleep.S ?| ? 52 --------------------------
>> ?arch/arm/plat-samsung/Kconfig ?| ? ?7 +++
>> ?arch/arm/plat-samsung/Makefile | ? ?1 +
>> ?arch/arm/plat-samsung/sleep.S ?| ? 80
>> ++++++++++++++++++++++++++++++++++++++++
>> ?12 files changed, 93 insertions(+), 181 deletions(-)
>> ?delete mode 100644 arch/arm/mach-exynos4/sleep.S
>> ?delete mode 100644 arch/arm/mach-s3c64xx/sleep.S
>> ?delete mode 100644 arch/arm/mach-s5pv210/sleep.S
>> ?create mode 100644 arch/arm/plat-samsung/sleep.S
>>
>
> (snip)
>
>> +ENTRY(s3c_cpu_resume)
>> +#if defined(CONFIG_S3C_PM_DEBUG_LED_SMDK)
>> +
>
> Hi Abhilash,
>
> Yes, would be nice if each sleep.S can be handled in plat-samsung for
> Samsung SoCs.
>
> Hmm...but the CONFIG_S3C_PM_DEBUG_LED_SMDK can be used on other SoCs for
> same reason even though it is available only on S3C64XX now. I think, we
> need to add SoC detecting here.
Quite right, it is possible to use this for other SoCs. But as of now,
my patch just intends
to move all the sleep code to a common place. The S3C64XX sleep code
has this feature
and I didn't want to disturb it in anyway, hence it has been added to
the common file.
Perhaps, generalizing it for other SoCs can be done later on top of this
>
>> +#undef S3C64XX_VA_GPIO
>> +#define S3C64XX_VA_GPIO (0x0)
>
> Please let me know why this is needed here.
The code is trying to access the registers at a stage where the MMU is
not enabled.
Hence, the VA_GPIO is being re-defined as 0 reducing S3C64XX_GPIOREG(reg)  to
reg.
It has been moved as is from the existing s3c64xx sleep code.
>
>
> Thanks.
>
> Best regards,
> Kgene.
> --
> Kukjin Kim <kgene.kim@samsung.com>, Senior Engineer,
> SW Solution Development Team, Samsung Electronics Co., Ltd.
>
>
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