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From:   Robert Marko <robimarko@gmail.com>
To:     agross@kernel.org, bjorn.andersson@linaro.org, kishon@ti.com,
        vkoul@kernel.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, linux-arm-msm@vger.kernel.org,
        linux-phy@lists.infradead.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, dmitry.baryshkov@linaro.org
Cc:     Robert Marko <robimarko@gmail.com>
Subject: [PATCH v4 1/3] phy: qcom-qmp-pcie: make pipe clock rate configurable
Date:   Tue, 21 Jun 2022 21:55:10 +0200
Message-Id: <20220621195512.1760362-1-robimarko@gmail.com>
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IPQ8074 Gen3 PCIe PHY uses 250MHz as the pipe clock rate instead of 125MHz
like every other PCIe QMP PHY does, so make it configurable as part of the
qmp_phy_cfg.

Signed-off-by: Robert Marko <robimarko@gmail.com>
---
Changes in v4:
* Set 125MHz as the default if not set in qmp_phy_cfg
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 14 ++++++++++++--
 1 file changed, 12 insertions(+), 2 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index b2cd0cf965d8..66be854fe7f3 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -1284,6 +1284,9 @@ struct qmp_phy_cfg {
 
 	/* true, if PHY has secondary tx/rx lanes to be configured */
 	bool is_dual_lane_phy;
+
+	/* QMP PHY pipe clock interface rate */
+	unsigned long pipe_clock_rate;
 };
 
 /**
@@ -2121,8 +2124,15 @@ static int phy_pipe_clk_register(struct qcom_qmp *qmp, struct device_node *np)
 
 	init.ops = &clk_fixed_rate_ops;
 
-	/* controllers using QMP phys use 125MHz pipe clock interface */
-	fixed->fixed_rate = 125000000;
+	/*
+	 * Controllers using QMP PHY-s use 125MHz pipe clock interface
+	 * unless other frequency is specified in the PHY config.
+	 */
+	if (qmp->phys[0]->cfg->pipe_clock_rate)
+		fixed->fixed_rate = qmp->phys[0]->cfg->pipe_clock_rate;
+	else
+		fixed->fixed_rate = 125000000;
+
 	fixed->hw.init = &init;
 
 	ret = devm_clk_hw_register(qmp->dev, &fixed->hw);
-- 
2.36.1