linux-kernel - Re: [PATCH v3 0/2] ARM: EXYNOS: Call regulator suspend prepare/finish

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Date:	Tue, 21 Oct 2014 09:24:45 +0200
From:	Krzysztof Kozłowski <k.kozlowski@...sung.com>
To:	Javier Martinez Canillas <javier.martinez@...labora.co.uk>,
	Kukjin Kim <kgene.kim@...sung.com>
Cc:	Doug Anderson <dianders@...omium.org>,
	Mark Brown <broonie@...nel.org>,
	Tomasz Figa <tomasz.figa@...il.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	linux-samsung-soc@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v3 0/2] ARM: EXYNOS: Call regulator suspend prepare/finish

On 20.10.2014 23:05, Javier Martinez Canillas wrote:
> Hello,
> 
> This series add support for Exynos platforms to prepare regulators for
> system suspend. The regulator core has a set of helpers functions to be
> used when the system is entering and leaving from a suspend state but
> currently there is only one user in mainline.
> 
> This user is drivers/mfd/sec-core.c but it calls regulator_suspend_prepare()
> from within the driver power-management suspend function. This does not
> seems to be correct since the regulator suspend prepare function affects all
> regulators in the system and not only the ones managed by this device.
> 
> So patch #1 in this series revert the commit that introduced that change and
> patch #2 calls the regulator framework suspend/finish functions from the
> Exynos platform power-management code. The first patch should be queued through
> the mfd tree and the second through the linux-samsung tree.
> 
> Changes since v2:
>  - Check for regulator_suspend_finish() return value for an error.
>    Suggested by Doug Anderson.
> 
> Changes since v1:
>  - Remove the call to regulator_suspend_prepare() from drivers/mfd/sec-core.c
>    as suggested by Doug Anderson.
>  - Call regulator_suspend_prepare() before s3c_pm_check_prepare() as suggested
>    by Doug Anderson.
>  - Added Lee Jones to cc list since there is a change for the mfd framework.
> 
> Javier Martinez Canillas (2):
>   Revert "mfd: sec-core: Prepare regulators for suspend state to reduce
>     power-consumption"
>   ARM: EXYNOS: Call regulator core suspend prepare and finish functions
> 
>  arch/arm/mach-exynos/suspend.c | 23 +++++++++++++++++++++++
>  drivers/mfd/Kconfig            |  1 -
>  drivers/mfd/sec-core.c         | 10 ----------
>  3 files changed, 23 insertions(+), 11 deletions(-)

Patchset tested on Trats2 board (Exynos4412 with max77686 PMIC, modified
DTS to disable buck[134] during suspend to RAM).

Tested-by: Krzysztof Kozlowski <k.kozlowski@...sung.com>

Best regards,
Krzysztof

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