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Fri, 22 Dec 2023 04:39:24 GMT Received: from [169.254.0.1] (10.49.16.6) by nalasex01c.na.qualcomm.com (10.47.97.35) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.2.1118.40; Thu, 21 Dec 2023 20:39:24 -0800 From: Bjorn Andersson Date: Thu, 21 Dec 2023 20:39:23 -0800 Subject: [PATCH v2 2/8] clk: qcom: gdsc: Enable supply reglator in GPU GX handler MIME-Version: 1.0 Message-ID: <20231220-sa8295p-gpu-v2-2-4763246b72c0@quicinc.com> References: <20231220-sa8295p-gpu-v2-0-4763246b72c0@quicinc.com> In-Reply-To: <20231220-sa8295p-gpu-v2-0-4763246b72c0@quicinc.com> To: Bjorn Andersson , Konrad Dybcio , Michael Turquette , Stephen Boyd , Rob Herring , "Krzysztof Kozlowski" , Conor Dooley , Taniya Das , Ulf Hansson , Johan Hovold , "Catalin Marinas" , Will Deacon CC: , , , , , , "Bjorn Andersson" X-Mailer: b4 0.12.0 X-Developer-Signature: v=1; a=ed25519-sha256; t=1703219963; l=1305; i=quic_bjorande@quicinc.com; s=20230915; h=from:subject:message-id; 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But in the event that the power-domain is supplied through a dedicated regulator (in contrast to being a subdomin of another power-domain), something needs to turn that regulator on, both to make sure things are powered and to match the operation in gdsc_disable(). Signed-off-by: Bjorn Andersson Reviewed-by: Konrad Dybcio --- drivers/clk/qcom/gdsc.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/drivers/clk/qcom/gdsc.c b/drivers/clk/qcom/gdsc.c index 5358e28122ab..e7a4068b9f39 100644 --- a/drivers/clk/qcom/gdsc.c +++ b/drivers/clk/qcom/gdsc.c @@ -557,7 +557,15 @@ void gdsc_unregister(struct gdsc_desc *desc) */ int gdsc_gx_do_nothing_enable(struct generic_pm_domain *domain) { - /* Do nothing but give genpd the impression that we were successful */ - return 0; + struct gdsc *sc = domain_to_gdsc(domain); + int ret = 0; + + /* Enable the parent supply, when controlled through the regulator framework. */ + if (sc->rsupply) + ret = regulator_enable(sc->rsupply); + + /* Do nothing with the GDSC itself */ + + return ret; } EXPORT_SYMBOL_GPL(gdsc_gx_do_nothing_enable);