linux-kernel - [PATCH 3/5] phy: qcom: edp: Add support for edp reference clock vote

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Message-Id: <20251009071127.26026-4-quic_riteshk@quicinc.com>
Date: Thu,  9 Oct 2025 12:41:25 +0530
From: Ritesh Kumar <quic_riteshk@...cinc.com>
To: robin.clark@....qualcomm.com, lumag@...nel.org, abhinav.kumar@...ux.dev,
        jessica.zhang@....qualcomm.com, sean@...rly.run,
        marijn.suijten@...ainline.org, maarten.lankhorst@...ux.intel.com,
        mripard@...nel.org, tzimmermann@...e.de, airlied@...il.com,
        simona@...ll.ch, robh@...nel.org, krzk+dt@...nel.org,
        conor+dt@...nel.org, quic_mahap@...cinc.com, andersson@...nel.org,
        konradybcio@...nel.org, mani@...nel.org,
        James.Bottomley@...senPartnership.com, martin.petersen@...cle.com,
        vkoul@...nel.org, kishon@...nel.org,
        cros-qcom-dts-watchers@...omium.org
Cc: Ritesh Kumar <quic_riteshk@...cinc.com>, linux-phy@...ts.infradead.org,
        linux-arm-msm@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        freedreno@...ts.freedesktop.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
        quic_vproddut@...cinc.com
Subject: [PATCH 3/5] phy: qcom: edp: Add support for edp reference clock vote

Commit 77d2fa54a9457 ("scsi: ufs: qcom : Refactor phy_power_on/off
calls") lead to edp reference clock to be turned off, leading to
below phy poweron failure on lemans edp phy.

phy phy-aec2a00.phy.10: phy poweron failed --> -110

edp reference clock is required to be enabled before edp PHY
initialization. This change adds support for voting the clock
from edp phy driver.

Signed-off-by: Ritesh Kumar <quic_riteshk@...cinc.com>
---
 drivers/phy/qualcomm/phy-qcom-edp.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-edp.c b/drivers/phy/qualcomm/phy-qcom-edp.c
index f1b51018683d..b544b5988fa6 100644
--- a/drivers/phy/qualcomm/phy-qcom-edp.c
+++ b/drivers/phy/qualcomm/phy-qcom-edp.c
@@ -103,7 +103,7 @@ struct qcom_edp {
 
 	struct phy_configure_opts_dp dp_opts;
 
-	struct clk_bulk_data clks[2];
+	struct clk_bulk_data clks[3];
 	struct regulator_bulk_data supplies[2];
 
 	bool is_edp;
@@ -1094,6 +1094,7 @@ static int qcom_edp_phy_probe(struct platform_device *pdev)
 
 	edp->clks[0].id = "aux";
 	edp->clks[1].id = "cfg_ahb";
+	edp->clks[2].id = "edp_ref";
 	ret = devm_clk_bulk_get(dev, ARRAY_SIZE(edp->clks), edp->clks);
 	if (ret)
 		return ret;
-- 
2.17.1