linux-kernel - Re: [PATCH v7 01/20] pinctrl: tegra: Add suspend and resume support

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Date:   Tue, 6 Aug 2019 20:40:47 -0700
From:   Sowjanya Komatineni <skomatineni@...dia.com>
To:     Linus Walleij <linus.walleij@...aro.org>
CC:     "thierry.reding@...il.com" <thierry.reding@...il.com>,
        Jon Hunter <jonathanh@...dia.com>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jason Cooper <jason@...edaemon.net>,
        Marc Zyngier <marc.zyngier@....com>,
        Stefan Agner <stefan@...er.ch>,
        Mark Rutland <mark.rutland@....com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        "Stephen Boyd" <sboyd@...nel.org>,
        linux-clk <linux-clk@...r.kernel.org>,
        "open list:GPIO SUBSYSTEM" <linux-gpio@...r.kernel.org>,
        <jckuo@...dia.com>, "Joseph Lo" <josephl@...dia.com>,
        <talho@...dia.com>, <linux-tegra@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "Mikko Perttunen" <mperttunen@...dia.com>, <spatra@...dia.com>,
        Rob Herring <robh+dt@...nel.org>,
        Dmitry Osipenko <digetx@...il.com>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>,
        "Rafael J. Wysocki" <rjw@...ysocki.net>,
        viresh kumar <viresh.kumar@...aro.org>,
        Linux PM list <linux-pm@...r.kernel.org>
Subject: Re: [PATCH v7 01/20] pinctrl: tegra: Add suspend and resume support


On 8/6/19 2:51 PM, Sowjanya Komatineni wrote:
>
> On 8/5/19 2:20 AM, Linus Walleij wrote:
>> On Wed, Jul 31, 2019 at 11:11 PM Sowjanya Komatineni
>> <skomatineni@...dia.com> wrote:
>>
>>> This patch adds support for Tegra pinctrl driver suspend and resume.
>>>
>>> During suspend, context of all pinctrl registers are stored and
>>> on resume they are all restored to have all the pinmux and pad
>>> configuration for normal operation.
>>>
>>> Acked-by: Thierry Reding <treding@...dia.com>
>>> Reviewed-by: Dmitry Osipenko <digetx@...il.com>
>>> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
>> Patch applied to the pinctrl tree.
>>
>> This patch seems finished.
>>
>> Also if the rest don't get merged for v5.4 then at least this is so
>> your patch stack gets more shallow.
>>
>> I hope it's fine to merge this separately, else tell me and I'll
>> pull it out.
>>
>> Yours,
>> Linus Walleij
>
> Yes, this patch can be merged separately. But, there's latest feedback 
> from Dmitry to add barrier after writes to make sure pinmux register 
> writes happen.
>
> So will update this patch to add barrier in v8. So, need to wait for v8.
>
> Thanks
>
> Sowjanya
>
I see it merged. So will exclude suspend/resume patch and will add patch 
for necessary write barrier fix in v8 version.

Thanks

Sowjanya