linux-kernel - Re: [PATCH v3] pinctrl: samsung: fix suspend/resume functionality

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Message-ID: <CACRpkdZ1zBrp+jpgw8o_PVd_bcQMpkFXvRAwfJH6KCztT4jx+w@mail.gmail.com>
Date:	Mon, 20 May 2013 13:47:14 +0200
From:	Linus Walleij <linus.walleij@...aro.org>
To:	Doug Anderson <dianders@...omium.org>
Cc:	Tomasz Figa <tomasz.figa@...il.com>,
	Kukjin Kim <kgene.kim@...sung.com>,
	Heiko Stübner <heiko@...ech.de>,
	Olof Johansson <olof@...om.net>,
	Stephen Warren <swarren@...dotorg.org>,
	Thomas Abraham <thomas.abraham@...aro.org>,
	Prathyush K <prathyush.k@...sung.com>,
	linux-samsung-soc <linux-samsung-soc@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3] pinctrl: samsung: fix suspend/resume functionality

On Fri, May 17, 2013 at 6:33 AM, Doug Anderson <dianders@...omium.org> wrote:

> The GPIO states need to be restored after s2r and this is not currently
> supported in the pinctrl driver. This patch saves the gpio states before
> suspend and restores them after resume.
>
> Saving and restoring is done very early using syscore_ops and must
> happen before pins are released from their powerdown state.
>
> Patch originally from Prathyush K <prathyush.k@...sung.com> but
> rewritten by Doug Anderson <dianders@...omium.org>.
>
> Signed-off-by: Prathyush K <prathyush.k@...sung.com>
> Signed-off-by: Doug Anderson <dianders@...omium.org>
> ---
> Changes in v3:
> - Skip save and restore for banks with no powerdown config.
>
> Changes in v2:
> - Now uses sycore_ops to make sure we're early enough.
> - Try to handle two CON registers better.
> - Should handle s3c24xx better as per Heiko.
> - Simpler code; no longer tries to avoid glitching lines since
>   we _think_ all current SoCs should have pins in power down state
>   when the restore is called.
> - Dropped eint patch for now; Tomasz will post his version.

Looks good to me.
Acked-by: Linus Walleij <linus.walleij@...aro.org>

How are you going to merge this?

Samsung tree?

My pinctrl development tree?

Or my fixes tree, if it's a regression for v3.10?

Yours,
Linus Walleij
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