linux-kernel - Re: [PATCH RFC] gpio: pca953x: Configure wake-up path when wake-up is enabled

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Message-ID: <CACRpkdaAZ8C-kmhWRMqu3y6yVJ--6UFjnoRi_iRtogwzzyGseQ@mail.gmail.com>
Date:   Mon, 8 Apr 2019 14:50:36 +0200
From:   Linus Walleij <linus.walleij@...aro.org>
To:     Geert Uytterhoeven <geert+renesas@...der.be>
Cc:     Bartosz Golaszewski <bgolaszewski@...libre.com>,
        "Rafael J . Wysocki" <rjw@...ysocki.net>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Kevin Hilman <khilman@...nel.org>,
        Laurent Pinchart <Laurent.pinchart@...asonboard.com>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux PM list <linux-pm@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH RFC] gpio: pca953x: Configure wake-up path when wake-up is enabled

On Wed, Mar 20, 2019 at 11:39 AM Geert Uytterhoeven
<geert+renesas@...der.be> wrote:

> If a device is part of the wake-up path, it should indicate this by
> setting its power.wakeup_path field.  This allows the genpd core code to
> keep the device enabled during system suspend when needed.
>
> As regulators powering devices are not handled by genpd, the driver
> handles these itself, and thus must skip regulator control when the
> device is part of the wake-up path.
>
> Signed-off-by: Geert Uytterhoeven <geert+renesas@...der.be>

Patch applied with Ulf's Review tag.

If there are even better ways to do it I think we can fix that on top of
this, it is best to start with something that obviously works and
take it from there.

Yours,
Linus Walleij