linux-kernel - RE: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl

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Message-ID: <HE1PR04MB1450A8150FB5A4FD25BEBDE38B610@HE1PR04MB1450.eurprd04.prod.outlook.com>
Date:   Wed, 4 Jan 2017 06:51:30 +0000
From:   Peter Chen <peter.chen@....com>
To:     Mark Brown <broonie@...nel.org>
CC:     "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [PATCH 1/1] regulator: fixed: add suspend pm routines for pinctrl

>On Tue, Jan 03, 2017 at 05:02:47PM +0800, Peter Chen wrote:
>> At some systems, the pinctrl setting will be lost or needs to set as
>> "sleep" state to save power consumption. So, we need to configure
>> pinctrl as "sleep" state when system enters suspend, and as "default"
>> state after system resumes. In this way, the pinctrl value can be
>> recovered as "default" state after resuming.
>
>I thought this was supposed to be done automatically by the driver core?
>If not it should be, every single driver is likely to end up with that.

Good idea, I will send a patch for that.

Peter