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Message-ID: <20190625134031.GA22491@ulmo>
Date: Tue, 25 Jun 2019 15:40:31 +0200
From: Thierry Reding <thierry.reding@...il.com>
To: Sowjanya Komatineni <skomatineni@...dia.com>
Cc: jonathanh@...dia.com, tglx@...utronix.de, jason@...edaemon.net,
marc.zyngier@....com, linus.walleij@...aro.org, stefan@...er.ch,
mark.rutland@....com, pdeschrijver@...dia.com, pgaikwad@...dia.com,
sboyd@...nel.org, linux-clk@...r.kernel.org,
linux-gpio@...r.kernel.org, jckuo@...dia.com, josephl@...dia.com,
talho@...dia.com, linux-tegra@...r.kernel.org,
linux-kernel@...r.kernel.org, mperttunen@...dia.com,
spatra@...dia.com, robh+dt@...nel.org, digetx@...il.com,
devicetree@...r.kernel.org
Subject: Re: [PATCH V4 03/18] gpio: tegra: use resume_noirq for tegra gpio
resume
On Sun, Jun 23, 2019 at 08:02:44PM -0700, Sowjanya Komatineni wrote:
> During SC7 resume, PARKED bit clear from the pinmux registers may
> cause a glitch on the GPIO lines.
>
> So, Tegra GPIOs restore should happen prior to restoring Tegra pinmux
> to keep the GPIO lines in a known good state prior to clearing PARKED
> bit.
>
> This patch has fix for this by moving Tegra GPIOs restore to happen
> very early than pinctrl resume.
>
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
> drivers/gpio/gpio-tegra.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
Acked-by: Thierry Reding <treding@...dia.com>
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