linux-kernel - Re: [PATCH] pinctrl: intel: save HOSTSW

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Date:   Thu, 28 Mar 2019 10:28:24 +0200
From:   Mika Westerberg <mika.westerberg@...ux.intel.com>
To:     Daniel Drake <drake@...lessm.com>
Cc:     Chris Chiu <chiu@...lessm.com>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Linus Walleij <linus.walleij@...aro.org>,
        "open list:PIN CONTROL SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        Linux Kernel <linux-kernel@...r.kernel.org>,
        Linux Upstreaming Team <linux@...lessm.com>,
        Andy Shevchenko <andriy.shevchenko@...el.com>
Subject: Re: [PATCH] pinctrl: intel: save HOSTSW_OWN register over
 suspend/resume

On Wed, Mar 27, 2019 at 07:29:40PM +0200, Mika Westerberg wrote:
> I wonder if it would be simpler to save it always and then upon resume
> compare them and if changed, log this in dmesg and restore the saved
> one.

Actually I think better is to restore hostsw_own only for GPIOs that are
already requested by us. The BIOS should have no business messing those
anyway once they are owned by the GPIO driver.