From: Stephen Warren <swarren@wwwdotorg.org>
To: Rhyland Klein <rklein@nvidia.com>,
Linus Walleij <linus.walleij@linaro.org>
Cc: Thierry Reding <thierry.reding@gmail.com>,
Alexandre Courbot <gnurou@gmail.com>,
linux-gpio@vger.kernel.org, linux-tegra@vger.kernel.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH] pinctrl: tegra: clear park bit for all pins
Date: Thu, 7 Apr 2016 16:10:29 -0600 [thread overview]
Message-ID: <5706DAD5.9020805@wwwdotorg.org> (raw)
In-Reply-To: <1460065028-26169-1-git-send-email-rklein@nvidia.com>
On 04/07/2016 03:37 PM, Rhyland Klein wrote:
> Parking bits might not be cleared by the bootloader properly (if for
> instance it doesn't use the device configured by that pin). Clear
> the park bits for all the pins during pinctrl probe.
>
> This is present on T210 platforms but not earlier ones, so for earlier
> generations, set parked_reg = -1 to disable.
>
> The park bit is used to prevent glitching when reprogramming pinctrl
> registers.
>
> Based on work by:
> Shravani Dingari <shravanid@nvidia.com>
>
> Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Acked-by: Stephen Warren <swarren@nvidia.com>
next prev parent reply other threads:[~2016-04-07 22:10 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2016-04-07 21:37 [PATCH] pinctrl: tegra: clear park bit for all pins Rhyland Klein
2016-04-07 21:37 ` Rhyland Klein
2016-04-07 22:10 ` Stephen Warren [this message]
[not found] ` <1460065028-26169-1-git-send-email-rklein-DDmLM1+adcrQT0dZR+AlfA@public.gmane.org>
2016-04-14 12:02 ` Linus Walleij
2016-04-14 12:02 ` Linus Walleij
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