[PATCH RESEND v2 13/13] phy: qcom-qmp-usb: add support for updated sc8280xp binding

[Johan Hovold <johan+linaro@kernel.org>]

Add support for the new SC8280XP binding.

Note that the binding does not try to describe every register subregion
and instead the driver holds the corresponding offsets. This includes
the PCS_USB region which was initially overlooked.

Note that the driver will no longer accept the old binding due to the
fixed "phy_phy" reset name.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
---
 drivers/phy/qualcomm/phy-qcom-qmp-usb.c | 82 ++++++++++++++++++++-----
 1 file changed, 67 insertions(+), 15 deletions(-)

diff --git a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
index 3f5e22b1d29e..372f9853c749 100644
--- a/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
+++ b/drivers/phy/qualcomm/phy-qcom-qmp-usb.c
@@ -1414,10 +1414,20 @@ static const struct qmp_phy_init_tbl sc8280xp_usb3_uniphy_pcs_tbl[] = {
 	QMP_PHY_INIT_CFG(QPHY_V5_PCS_REFGEN_REQ_CONFIG1, 0x21),
 };
 
+struct qmp_usb_offsets {
+	u16 serdes;
+	u16 pcs;
+	u16 pcs_usb;
+	u16 tx;
+	u16 rx;
+};
+
 /* struct qmp_phy_cfg - per-PHY initialization config */
 struct qmp_phy_cfg {
 	int lanes;
 
+	const struct qmp_usb_offsets *offsets;
+
 	/* Init sequence for PHY blocks - serdes, tx, rx, pcs */
 	const struct qmp_phy_init_tbl *serdes_tbl;
 	int serdes_tbl_num;
@@ -1548,6 +1558,14 @@ static const char * const qmp_phy_vreg_l[] = {
 	"vdda-phy", "vdda-pll",
 };
 
+static const struct qmp_usb_offsets qmp_usb_offsets_v5 = {
+	.serdes		= 0,
+	.pcs		= 0x0200,
+	.pcs_usb	= 0x1200,
+	.tx		= 0x0e00,
+	.rx		= 0x1000,
+};
+
 static const struct qmp_phy_cfg ipq8074_usb3phy_cfg = {
 	.lanes			= 1,
 
@@ -1637,6 +1655,8 @@ static const struct qmp_phy_cfg sc7180_usb3phy_cfg = {
 static const struct qmp_phy_cfg sc8280xp_usb3_uniphy_cfg = {
 	.lanes			= 1,
 
+	.offsets		= &qmp_usb_offsets_v5,
+
 	.serdes_tbl		= sc8280xp_usb3_uniphy_serdes_tbl,
 	.serdes_tbl_num		= ARRAY_SIZE(sc8280xp_usb3_uniphy_serdes_tbl),
 	.tx_tbl			= sc8280xp_usb3_uniphy_tx_tbl,
@@ -1647,12 +1667,11 @@ static const struct qmp_phy_cfg sc8280xp_usb3_uniphy_cfg = {
 	.pcs_tbl_num		= ARRAY_SIZE(sc8280xp_usb3_uniphy_pcs_tbl),
 	.clk_list		= qmp_v4_phy_clk_l,
 	.num_clks		= ARRAY_SIZE(qmp_v4_phy_clk_l),
-	.reset_list		= msm8996_usb3phy_reset_l,
-	.num_resets		= ARRAY_SIZE(msm8996_usb3phy_reset_l),
+	.reset_list		= qcm2290_usb3phy_reset_l,
+	.num_resets		= ARRAY_SIZE(qcm2290_usb3phy_reset_l),
 	.vreg_list		= qmp_phy_vreg_l,
 	.num_vregs		= ARRAY_SIZE(qmp_phy_vreg_l),
 	.regs			= qmp_v4_usb3phy_regs_layout,
-	.pcs_usb_offset		= 0x1000,
 };
 
 static const struct qmp_phy_cfg qmp_v3_usb3_uniphy_cfg = {
@@ -2461,11 +2480,41 @@ static int qmp_usb_parse_dt_legacy(struct qmp_usb *qmp, struct device_node *np)
 	return 0;
 }
 
+static int qmp_usb_parse_dt(struct qmp_usb *qmp)
+{
+	struct platform_device *pdev = to_platform_device(qmp->dev);
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	const struct qmp_usb_offsets *offs = cfg->offsets;
+	struct device *dev = qmp->dev;
+	void __iomem *base;
+
+	if (!offs)
+		return -EINVAL;
+
+	base = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	qmp->serdes = base + offs->serdes;
+	qmp->pcs = base + offs->pcs;
+	qmp->pcs_usb = base + offs->pcs_usb;
+	qmp->tx = base + offs->tx;
+	qmp->rx = base + offs->rx;
+
+	qmp->pipe_clk = devm_clk_get(dev, "pipe");
+	if (IS_ERR(qmp->pipe_clk)) {
+		return dev_err_probe(dev, PTR_ERR(qmp->pipe_clk),
+				     "failed to get pipe clock\n");
+	}
+
+	return 0;
+}
+
 static int qmp_usb_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
-	struct device_node *child;
 	struct phy_provider *phy_provider;
+	struct device_node *np;
 	struct qmp_usb *qmp;
 	int ret;
 
@@ -2491,9 +2540,16 @@ static int qmp_usb_probe(struct platform_device *pdev)
 	if (ret)
 		return ret;
 
-	child = of_get_next_available_child(dev->of_node, NULL);
-	if (!child)
-		return -EINVAL;
+	/* Check for legacy binding with child node. */
+	np = of_get_next_available_child(dev->of_node, NULL);
+	if (np) {
+		ret = qmp_usb_parse_dt_legacy(qmp, np);
+	} else {
+		np = of_node_get(dev->of_node);
+		ret = qmp_usb_parse_dt(qmp);
+	}
+	if (ret)
+		goto err_node_put;
 
 	pm_runtime_set_active(dev);
 	ret = devm_pm_runtime_enable(dev);
@@ -2505,15 +2561,11 @@ static int qmp_usb_probe(struct platform_device *pdev)
 	 */
 	pm_runtime_forbid(dev);
 
-	ret = qmp_usb_parse_dt_legacy(qmp, child);
-	if (ret)
-		goto err_node_put;
-
-	ret = phy_pipe_clk_register(qmp, child);
+	ret = phy_pipe_clk_register(qmp, np);
 	if (ret)
 		goto err_node_put;
 
-	qmp->phy = devm_phy_create(dev, child, &qmp_usb_phy_ops);
+	qmp->phy = devm_phy_create(dev, np, &qmp_usb_phy_ops);
 	if (IS_ERR(qmp->phy)) {
 		ret = PTR_ERR(qmp->phy);
 		dev_err(dev, "failed to create PHY: %d\n", ret);
@@ -2522,14 +2574,14 @@ static int qmp_usb_probe(struct platform_device *pdev)
 
 	phy_set_drvdata(qmp->phy, qmp);
 
-	of_node_put(child);
+	of_node_put(np);
 
 	phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
 
 	return PTR_ERR_OR_ZERO(phy_provider);
 
 err_node_put:
-	of_node_put(child);
+	of_node_put(np);
 	return ret;
 }
 
-- 
2.37.3