linux-kernel - Re: [PATCH V4 10/18] clk: tegra: add save and restore context support for peripheral clocks

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Message-ID: <20190626101213.GC6362@ulmo>
Date:   Wed, 26 Jun 2019 12:12:13 +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 10/18] clk: tegra: add save and restore context
 support for peripheral clocks

On Sun, Jun 23, 2019 at 08:02:51PM -0700, Sowjanya Komatineni wrote:
> This patch implements save and restore context for peripheral fixed
> clock ops, peripheral gate clock ops, sdmmc mux clock ops, and
> peripheral clock ops.
> 
> During system suspend, core power goes off and looses the settings
> of the Tegra CAR controller registers.
> 
> So during suspend entry clock and reset state of peripherals is saved
> and on resume they are restored to have clocks back to same rate and
> state as before suspend.
> 
> Signed-off-by: Sowjanya Komatineni <skomatineni@...dia.com>
> ---
>  drivers/clk/tegra/clk-periph-fixed.c | 31 ++++++++++++++++++++++++++
>  drivers/clk/tegra/clk-periph-gate.c  | 34 ++++++++++++++++++++++++++++
>  drivers/clk/tegra/clk-periph.c       | 43 ++++++++++++++++++++++++++++++++++++
>  drivers/clk/tegra/clk-sdmmc-mux.c    | 30 +++++++++++++++++++++++++
>  drivers/clk/tegra/clk.h              |  8 +++++++
>  5 files changed, 146 insertions(+)

Acked-by: Thierry Reding <treding@...dia.com>

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