From: Stephen Boyd <sboyd@kernel.org>
To: Bjorn Andersson <bjorn.andersson@linaro.org>,
Michael Turquette <mturquette@baylibre.com>,
Rob Herring <robh+dt@kernel.org>
Cc: Andy Gross <agross@kernel.org>,
linux-arm-msm@vger.kernel.org, linux-clk@vger.kernel.org,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH v2 1/4] clk: qcom: gdsc: Handle GDSC regulator supplies
Date: Thu, 14 May 2020 14:23:57 -0700 [thread overview]
Message-ID: <158949143731.215346.8783756589199321663@swboyd.mtv.corp.google.com> (raw)
In-Reply-To: <20200417070044.1376212-2-bjorn.andersson@linaro.org>
Quoting Bjorn Andersson (2020-04-17 00:00:41)
> Certain GDSCs, such as the GPU_GX on MSM8996, requires that the upstream
> regulator supply is powered in order to be turned on.
>
> It's not guaranteed that the bootloader will leave these supplies on and
> the driver core will attempt to enable any GDSCs before allowing the
> individual drivers to probe defer on the PMIC regulator driver not yet
> being present.
>
> So the gdsc driver needs to be made aware of supplying regulators and
> probe defer on their absence, and it needs to enable and disable the
> regulator accordingly.
>
> Voltage adjustments of the supplying regulator are deferred to the
> client drivers themselves.
>
> Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
> ---
Applied to clk-next
next prev parent reply other threads:[~2020-05-14 21:24 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-17 7:00 [PATCH v2 0/4] clk: qcom: gdsc: Handle supply regulators Bjorn Andersson
2020-04-17 7:00 ` [PATCH v2 1/4] clk: qcom: gdsc: Handle GDSC regulator supplies Bjorn Andersson
2020-05-14 21:23 ` Stephen Boyd [this message]
2020-04-17 7:00 ` [PATCH v2 2/4] clk: qcom: mmcc-msm8996: Properly describe GPU_GX gdsc Bjorn Andersson
2020-04-29 21:35 ` Rob Herring
2020-05-14 21:24 ` Stephen Boyd
2020-04-17 7:00 ` [PATCH v2 3/4] arm64: dts: qcom: db820c: Add vdd_gfx and tie it into mmcc Bjorn Andersson
2020-04-17 7:00 ` [PATCH v2 4/4] arm64: dts: qcom: msm8996: Make GPU node control GPU_GX GDSC Bjorn Andersson
2020-05-14 17:11 ` [PATCH v2 0/4] clk: qcom: gdsc: Handle supply regulators Vinod Koul
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