linux-kernel - Re: [PATCH v1] reset: Add devm_reset_control_get_optional_exclusive

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Date:   Mon, 25 Jan 2021 17:46:21 +0100
From:   Philipp Zabel <p.zabel@...gutronix.de>
To:     Dmitry Osipenko <digetx@...il.com>,
        Thierry Reding <thierry.reding@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Nicolas Chauvet <kwizart@...il.com>,
        Matt Merhar <mattmerhar@...tonmail.com>,
        Peter Geis <pgwipeout@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v1] reset: Add
 devm_reset_control_get_optional_exclusive_released()

Hi Dmitry,

On Sat, 2021-01-23 at 19:34 +0300, Dmitry Osipenko wrote:
> NVIDIA Tegra DRM and media drivers will need a resource-managed-optional
> variant of reset_control_get_exclusive_released() in order to switch away
> from a legacy Tegra-specific PD API to a GENPD API without much hassle.
> Add the new reset helper to the reset API.
> 
> Tested-by: Peter Geis <pgwipeout@...il.com> # Ouya T30
> Tested-by: Nicolas Chauvet <kwizart@...il.com> # PAZ00 T20
> Tested-by: Matt Merhar <mattmerhar@...tonmail.com> # Ouya T30
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---
> 
> Hello Philipp,
> 
> This patch is a prerequisite for a power domain enablement using
> GENPD API on NVIDIA Tegra20/30 SoCs. The hardware resets are acquired
> by a Tegra PMC (Power Management Controller) driver until device is
> RPM-resumed if GENPD API is used, and thus, device drivers need to
> request resets in a released state. The resets are also optional,
> depending on hardware and DTB versions. This is why we will need the
> new helper. Will be awesome if you could pick up this patch for v5.12,
> this will help to avoid inter-subsystem dependencies for the driver
> patches that will target v5.13. Thanks in advance!

Thank you, looks good to me. Applied to reset/next for v5.12.

regards
Philipp