From: Linus Walleij <linus.walleij@linaro.org>
To: Florian Fainelli <f.fainelli@gmail.com>,
ext Tony Lindgren <tony@atomide.com>
Cc: linux-gpio@vger.kernel.org, Rob Herring <robh+dt@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
"open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS"
<devicetree@vger.kernel.org>,
open list <linux-kernel@vger.kernel.org>,
Charles Keepax <ckeepax@opensource.cirrus.com>,
Charles Keepax <ckeepax@opensource.wolfsonmicro.com>,
Stephen Warren <swarren@nvidia.com>,
Andy Shevchenko <andy.shevchenko@gmail.com>,
Al Cooper <alcooperx@gmail.com>,
bcm-kernel-feedback-list <bcm-kernel-feedback-list@broadcom.com>
Subject: Re: [PATCH v2 2/2] pinctrl: Allow indicating loss of pin states during low-power
Date: Wed, 29 Nov 2017 14:01:18 +0100 [thread overview]
Message-ID: <CACRpkdZtFRB_iy1bDPZ0wkK0jf7pkTGtbZG4gQUJVR+eiO+dhA@mail.gmail.com> (raw)
In-Reply-To: <20171102231551.16220-3-f.fainelli@gmail.com>
On Fri, Nov 3, 2017 at 12:15 AM, Florian Fainelli <f.fainelli@gmail.com> wrote:
> Some platforms (e.g: Broadcom STB: BMIPS_GENERIC/ARCH_BRCMSTB) will lose
> their register contents when entering their lower power state. In such a
> case, the pinctrl-single driver that is used will not be able to restore
> the power states without telling the core about it and having
> pinctrl_select_state() check for that.
>
> This patch adds a new optional boolean property that Device Tree can
> define in order to obtain exactly that and having the core pinctrl code
> take that into account.
>
> Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Florian, I'm really sorry for losing track of this patch set, it's
important stuff and I see why systems are dependent on something
like this.
Tony: can you look at this from a pinctrl-single point of view?
This is the intended consumer: pinctrl-single users that lose the
hardware state over suspend/resume.
How do you see this working with other pinctrl-single users?
Yours,
Linus Walleij
next prev parent reply other threads:[~2017-11-29 13:01 UTC|newest]
Thread overview: 31+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-02 23:15 [PATCH v2 0/2] pinctrl: Allow indicating loss of state across suspend/resume Florian Fainelli
2017-11-02 23:15 ` [PATCH v2 1/2] pinctrl: Allow a device to indicate when to force a state Florian Fainelli
[not found] ` <20171102231551.16220-2-f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-11-29 13:06 ` Linus Walleij
2017-11-29 17:01 ` Tony Lindgren
2017-11-29 17:35 ` Florian Fainelli
2017-11-29 17:45 ` Tony Lindgren
2017-11-29 18:15 ` Florian Fainelli
2017-11-29 18:27 ` Tony Lindgren
2017-11-02 23:15 ` [PATCH v2 2/2] pinctrl: Allow indicating loss of pin states during low-power Florian Fainelli
2017-11-29 13:01 ` Linus Walleij [this message]
[not found] ` <CACRpkdZtFRB_iy1bDPZ0wkK0jf7pkTGtbZG4gQUJVR+eiO+dhA-JsoAwUIsXosN+BqQ9rBEUg@public.gmane.org>
2017-11-29 17:02 ` Tony Lindgren
[not found] ` <20171129170247.GI28152-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2017-11-29 17:37 ` Florian Fainelli
[not found] ` <96cf5d74-3acf-07b9-9ad8-1011cd99a860-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-12-02 12:48 ` Linus Walleij
2017-12-10 23:38 ` Florian Fainelli
[not found] ` <908c66f9-f9bd-a4df-e241-75595a3a3e27-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-12-20 7:24 ` Linus Walleij
2017-12-30 19:31 ` Florian Fainelli
[not found] ` <20171102231551.16220-1-f.fainelli-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
2017-11-03 10:37 ` [PATCH v2 0/2] pinctrl: Allow indicating loss of state across suspend/resume Charles Keepax
2017-11-03 16:11 ` Tony Lindgren
2017-11-03 17:02 ` Florian Fainelli
2017-11-03 17:33 ` Tony Lindgren
2017-11-04 8:37 ` Charles Keepax
[not found] ` <20171104083707.gtmnhbrzlqjulwe4-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2017-11-07 16:00 ` Tony Lindgren
[not found] ` <20171103173353.GJ28152-4v6yS6AI5VpBDgjK7y7TUQ@public.gmane.org>
2017-11-04 12:25 ` Rafael J. Wysocki
2017-11-04 17:19 ` Florian Fainelli
2017-11-07 16:00 ` Tony Lindgren
2017-11-08 0:23 ` Rafael J. Wysocki
2017-11-08 0:28 ` Florian Fainelli
2017-11-08 0:45 ` Rafael J. Wysocki
2017-11-08 1:04 ` Tony Lindgren
2017-11-08 1:02 ` Tony Lindgren
[not found] ` <20171103103707.3e5wb3c7foxbuvvg-bi+AKbBUZKY6gyzm1THtWbp2dZbC/Bob@public.gmane.org>
2017-11-03 17:03 ` Florian Fainelli
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