linux-kernel - Re: [PATCH v4] clk: tegra: pll: Improve PLLM enable-state detection

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Message-ID: <159589928947.1360974.2291551893182994686@swboyd.mtv.corp.google.com>
Date:   Mon, 27 Jul 2020 18:21:29 -0700
From:   Stephen Boyd <sboyd@...nel.org>
To:     Dmitry Osipenko <digetx@...il.com>,
        Jonathan Hunter <jonathanh@...dia.com>,
        Michael Turquette <mturquette@...libre.com>,
        Peter De Schrijver <pdeschrijver@...dia.com>,
        Prashant Gaikwad <pgaikwad@...dia.com>,
        Thierry Reding <thierry.reding@...il.com>
Cc:     linux-tegra@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v4] clk: tegra: pll: Improve PLLM enable-state detection

Quoting Dmitry Osipenko (2020-07-09 10:20:57)
> Power Management Controller (PMC) can override the PLLM clock settings,
> including the enable-state. Although PMC could only act as a second level
> gate, meaning that PLLM needs to be enabled by the Clock and Reset
> Controller (CaR) anyways if we want it to be enabled. Hence, when PLLM is
> overridden by PMC, it needs to be enabled by CaR and ungated by PMC in
> order to be functional. Please note that this patch doesn't fix any known
> problem, and thus, it's merely a minor improvement.
> 
> Link: https://lore.kernel.org/linux-arm-kernel/20191210120909.GA2703785@ulmo/T/
> Signed-off-by: Dmitry Osipenko <digetx@...il.com>
> ---

Applied to clk-next