linux-kernel - Re: [PATCH] clk: qcom: gdsc: Ensure regulator init state matches GDSC state

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Message-ID: <YNlhOelUfJwfbHCd@matsya>
Date:   Mon, 28 Jun 2021 11:12:17 +0530
From:   Vinod Koul <vkoul@...nel.org>
To:     Bjorn Andersson <bjorn.andersson@...aro.org>
Cc:     Andy Gross <agross@...nel.org>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>, dmitry.baryshkov@...aro.org,
        linux-arm-msm@...r.kernel.org, linux-clk@...r.kernel.org,
        linux-kernel@...r.kernel.org, stable@...r.kernel.org
Subject: Re: [PATCH] clk: qcom: gdsc: Ensure regulator init state matches
 GDSC state

On 25-06-21, 15:54, Bjorn Andersson wrote:
> As GDSCs are registered and found to be already enabled
> gdsc_toggle_logic() will be invoked for votable GDSCs and ensure that
> the vote is matching the hardware state. Part of this the related
> regulator will be enabled.
> 
> But for non-votable GDSCs the regulator and GDSC status will be out of
> sync and as the GDSC is later disabled regulator_disable() will face an
> unbalanced enable-count, or something might turn off the supply under
> the feet of the GDSC.
> 
> So ensure that the regulator is enabled even for non-votable GDSCs.

Reviewed-by: Vinod Koul <vkoul@...nel.org>

-- 
~Vinod