phy: qcom-qmp-usb: clean up probe initialisation

Stop abusing the driver data pointer and instead pass the driver state
structure directly to the initialisation helpers during probe.

Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Signed-off-by: Johan Hovold <johan+linaro@kernel.org>
Link: https://lore.kernel.org/r/20221028160435.26948-8-johan+linaro@kernel.org
Signed-off-by: Vinod Koul <vkoul@kernel.org>

drivers/phy/qualcomm/phy-qcom-qmp-usb.c

@@ -2250,9 +2250,10 @@ static const struct dev_pm_ops qmp_usb_pm_ops = {
 			   qmp_usb_runtime_resume, NULL)
 };
 
-static int qmp_usb_vreg_init(struct device *dev, const struct qmp_phy_cfg *cfg)
+static int qmp_usb_vreg_init(struct qmp_usb *qmp)
 {
-	struct qmp_usb *qmp = dev_get_drvdata(dev);
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	struct device *dev = qmp->dev;
 	int num = cfg->num_vregs;
 	int i;
 
@@ -2266,9 +2267,10 @@ static int qmp_usb_vreg_init(struct device *dev, const struct qmp_phy_cfg *cfg)
 	return devm_regulator_bulk_get(dev, num, qmp->vregs);
 }
 
-static int qmp_usb_reset_init(struct device *dev, const struct qmp_phy_cfg *cfg)
+static int qmp_usb_reset_init(struct qmp_usb *qmp)
 {
-	struct qmp_usb *qmp = dev_get_drvdata(dev);
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	struct device *dev = qmp->dev;
 	int i;
 	int ret;
 
@@ -2287,9 +2289,10 @@ static int qmp_usb_reset_init(struct device *dev, const struct qmp_phy_cfg *cfg)
 	return 0;
 }
 
-static int qmp_usb_clk_init(struct device *dev, const struct qmp_phy_cfg *cfg)
+static int qmp_usb_clk_init(struct qmp_usb *qmp)
 {
-	struct qmp_usb *qmp = dev_get_drvdata(dev);
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	struct device *dev = qmp->dev;
 	int num = cfg->num_clks;
 	int i;
 
@@ -2385,10 +2388,10 @@ static void __iomem *qmp_usb_iomap(struct device *dev, struct device_node *np,
 	return devm_of_iomap(dev, np, index, NULL);
 }
 
-static int qmp_usb_create(struct device *dev, struct device_node *np,
-			void __iomem *serdes, const struct qmp_phy_cfg *cfg)
+static int qmp_usb_create(struct qmp_usb *qmp, struct device_node *np)
 {
-	struct qmp_usb *qmp = dev_get_drvdata(dev);
+	const struct qmp_phy_cfg *cfg = qmp->cfg;
+	struct device *dev = qmp->dev;
 	struct phy *generic_phy;
 	bool exclusive = true;
 	int ret;
@@ -2402,8 +2405,6 @@ static int qmp_usb_create(struct device *dev, struct device_node *np,
 	if (of_device_is_compatible(dev->of_node, "qcom,sm8350-qmp-usb3-uni-phy"))
 		exclusive = false;
 
-	qmp->cfg = cfg;
-	qmp->serdes = serdes;
 	/*
 	 * Get memory resources for the PHY:
 	 * Resources are indexed as: tx -> 0; rx -> 1; pcs -> 2.
@@ -2468,8 +2469,6 @@ static int qmp_usb_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *child;
 	struct phy_provider *phy_provider;
-	void __iomem *serdes;
-	const struct qmp_phy_cfg *cfg = NULL;
 	struct qmp_usb *qmp;
 	int ret;
 
@@ -2478,31 +2477,30 @@ static int qmp_usb_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	qmp->dev = dev;
-	dev_set_drvdata(dev, qmp);
 
-	cfg = of_device_get_match_data(dev);
-	if (!cfg)
+	qmp->cfg = of_device_get_match_data(dev);
+	if (!qmp->cfg)
 		return -EINVAL;
 
-	serdes = devm_platform_ioremap_resource(pdev, 0);
-	if (IS_ERR(serdes))
-		return PTR_ERR(serdes);
+	qmp->serdes = devm_platform_ioremap_resource(pdev, 0);
+	if (IS_ERR(qmp->serdes))
+		return PTR_ERR(qmp->serdes);
 
-	if (cfg->has_phy_dp_com_ctrl) {
+	if (qmp->cfg->has_phy_dp_com_ctrl) {
 		qmp->dp_com = devm_platform_ioremap_resource(pdev, 1);
 		if (IS_ERR(qmp->dp_com))
 			return PTR_ERR(qmp->dp_com);
 	}
 
-	ret = qmp_usb_clk_init(dev, cfg);
+	ret = qmp_usb_clk_init(qmp);
 	if (ret)
 		return ret;
 
-	ret = qmp_usb_reset_init(dev, cfg);
+	ret = qmp_usb_reset_init(qmp);
 	if (ret)
 		return ret;
 
-	ret = qmp_usb_vreg_init(dev, cfg);
+	ret = qmp_usb_vreg_init(qmp);
 	if (ret)
 		return ret;
 
@@ -2520,7 +2518,7 @@ static int qmp_usb_probe(struct platform_device *pdev)
 	 */
 	pm_runtime_forbid(dev);
 
-	ret = qmp_usb_create(dev, child, serdes, cfg);
+	ret = qmp_usb_create(qmp, child);
 	if (ret)
 		goto err_node_put;