linux-kernel - [PATCH 08/15] phy: qcom-qmp-pcie: add register init helper

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Date:   Mon, 17 Oct 2022 16:53:21 +0200
From:   Johan Hovold <johan+linaro@...nel.org>
To:     Vinod Koul <vkoul@...nel.org>
Cc:     Andy Gross <agross@...nel.org>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio <konrad.dybcio@...ainline.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Dmitry Baryshkov <dmitry.baryshkov@...aro.org>,
        linux-arm-msm@...r.kernel.org, linux-phy@...ts.infradead.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        Johan Hovold <johan+linaro@...nel.org>
Subject: [PATCH 08/15] phy: qcom-qmp-pcie: add register init helper

Generalise the serdes initialisation helper so that it can be used to
initialise all the PHY registers (e.g. serdes, tx, rx, pcs).

Note that this defers the ungating of the PIPE clock somewhat, which is
fine as it isn't needed until starting the PHY.

Signed-off-by: Johan Hovold <johan+linaro@...nel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-pcie.c | 51 +++++++-----------------
 1 file changed, 15 insertions(+), 36 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
index dd7e72424fc0..f57d10f20277 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-pcie.c
@@ -1820,46 +1820,32 @@ static void qmp_pcie_configure(void __iomem *base,
 	qmp_pcie_configure_lane(base, tbl, num, 0xff);
 }
 
-static void qmp_pcie_serdes_init(struct qmp_pcie *qmp, const struct qmp_phy_cfg_tables *tables)
-{
-	void __iomem *serdes = qmp->serdes;
-
-	if (!tables)
-		return;
-
-	qmp_pcie_configure(serdes, tables->serdes, tables->serdes_num);
-}
-
-static void qmp_pcie_lanes_init(struct qmp_pcie *qmp, const struct qmp_phy_cfg_tables *tables)
+static void qmp_pcie_init_registers(struct qmp_pcie *qmp, const struct qmp_phy_cfg_tables *tbls)
 {
 	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	void __iomem *serdes = qmp->serdes;
 	void __iomem *tx = qmp->tx;
 	void __iomem *rx = qmp->rx;
 	void __iomem *tx2 = qmp->tx2;
 	void __iomem *rx2 = qmp->rx2;
+	void __iomem *pcs = qmp->pcs;
+	void __iomem *pcs_misc = qmp->pcs_misc;
 
-	if (!tables)
+	if (!tbls)
 		return;
 
-	qmp_pcie_configure_lane(tx, tables->tx, tables->tx_num, 1);
-	qmp_pcie_configure_lane(rx, tables->rx, tables->rx_num, 1);
+	qmp_pcie_configure(serdes, tbls->serdes, tbls->serdes_num);
+
+	qmp_pcie_configure_lane(tx, tbls->tx, tbls->tx_num, 1);
+	qmp_pcie_configure_lane(rx, tbls->rx, tbls->rx_num, 1);
 
 	if (cfg->lanes >= 2) {
-		qmp_pcie_configure_lane(tx2, tables->tx, tables->tx_num, 2);
-		qmp_pcie_configure_lane(rx2, tables->rx, tables->rx_num, 2);
+		qmp_pcie_configure_lane(tx2, tbls->tx, tbls->tx_num, 2);
+		qmp_pcie_configure_lane(rx2, tbls->rx, tbls->rx_num, 2);
 	}
-}
-
-static void qmp_pcie_pcs_init(struct qmp_pcie *qmp, const struct qmp_phy_cfg_tables *tables)
-{
-	void __iomem *pcs = qmp->pcs;
-	void __iomem *pcs_misc = qmp->pcs_misc;
-
-	if (!tables)
-		return;
 
-	qmp_pcie_configure(pcs, tables->pcs, tables->pcs_num);
-	qmp_pcie_configure(pcs_misc, tables->pcs_misc, tables->pcs_misc_num);
+	qmp_pcie_configure(pcs, tbls->pcs, tbls->pcs_num);
+	qmp_pcie_configure(pcs_misc, tbls->pcs_misc, tbls->pcs_misc_num);
 }
 
 static int qmp_pcie_init(struct phy *phy)
@@ -1932,8 +1918,8 @@ static int qmp_pcie_power_on(struct phy *phy)
 	else
 		mode_tables = cfg->tables_ep;
 
-	qmp_pcie_serdes_init(qmp, &cfg->tables);
-	qmp_pcie_serdes_init(qmp, mode_tables);
+	qmp_pcie_init_registers(qmp, &cfg->tables);
+	qmp_pcie_init_registers(qmp, mode_tables);
 
 	ret = clk_prepare_enable(qmp->pipe_clk);
 	if (ret) {
@@ -1941,13 +1927,6 @@ static int qmp_pcie_power_on(struct phy *phy)
 		return ret;
 	}
 
-	/* Tx, Rx, and PCS configurations */
-	qmp_pcie_lanes_init(qmp, &cfg->tables);
-	qmp_pcie_lanes_init(qmp, mode_tables);
-
-	qmp_pcie_pcs_init(qmp, &cfg->tables);
-	qmp_pcie_pcs_init(qmp, mode_tables);
-
 	/* Pull PHY out of reset state */
 	qphy_clrbits(pcs, cfg->regs[QPHY_SW_RESET], SW_RESET);
 
-- 
2.37.3