From 4e7d472b61625804f585035a54364a6620bf803a Mon Sep 17 00:00:00 2001
From: Jonas Karlman <jonas@kwiboo.se>
Date: Wed, 23 Jul 2025 12:23:00 +0000
Subject: [PATCH] phy: rockchip: inno-usb2: Simplify rockchip,usbgrf handling

The logic to decide if usbgrf or grf should be used is more complex than
it needs to be. For RK3568, RV1108 and soon RK3528 we can assign the
rockchip,usbgrf regmap directly to grf instead of doing a usbgrf and grf
dance.

Simplify the code to only use the grf regmap and handle the logic of
what regmap should be used in driver probe instead.

The only expected change from this is that RK3528 can be supported
because of an addition of a of_property_present() check.

Signed-off-by: Jonas Karlman <jonas@kwiboo.se>
---
 drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 68 +++++--------------
 1 file changed, 18 insertions(+), 50 deletions(-)

--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -228,7 +228,6 @@ struct rockchip_usb2phy_port {
  * struct rockchip_usb2phy - usb2.0 phy driver data.
  * @dev: pointer to device.
  * @grf: General Register Files regmap.
- * @usbgrf: USB General Register Files regmap.
  * @clks: array of phy input clocks.
  * @clk480m: clock struct of phy output clk.
  * @clk480m_hw: clock struct of phy output clk management.
@@ -246,7 +245,6 @@ struct rockchip_usb2phy_port {
 struct rockchip_usb2phy {
 	struct device	*dev;
 	struct regmap	*grf;
-	struct regmap	*usbgrf;
 	struct clk_bulk_data	*clks;
 	struct clk	*clk480m;
 	struct clk_hw	clk480m_hw;
@@ -261,11 +259,6 @@ struct rockchip_usb2phy {
 	struct rockchip_usb2phy_port	ports[USB2PHY_NUM_PORTS];
 };
 
-static inline struct regmap *get_reg_base(struct rockchip_usb2phy *rphy)
-{
-	return rphy->usbgrf == NULL ? rphy->grf : rphy->usbgrf;
-}
-
 static inline int property_enable(struct regmap *base,
 				  const struct usb2phy_reg *reg, bool en)
 {
@@ -323,12 +316,11 @@ static int rockchip_usb2phy_clk480m_prep
 {
 	struct rockchip_usb2phy *rphy =
 		container_of(hw, struct rockchip_usb2phy, clk480m_hw);
-	struct regmap *base = get_reg_base(rphy);
 	int ret;
 
 	/* turn on 480m clk output if it is off */
-	if (!property_enabled(base, &rphy->phy_cfg->clkout_ctl)) {
-		ret = property_enable(base, &rphy->phy_cfg->clkout_ctl, true);
+	if (!property_enabled(rphy->grf, &rphy->phy_cfg->clkout_ctl)) {
+		ret = property_enable(rphy->grf, &rphy->phy_cfg->clkout_ctl, true);
 		if (ret)
 			return ret;
 
@@ -343,19 +335,17 @@ static void rockchip_usb2phy_clk480m_unp
 {
 	struct rockchip_usb2phy *rphy =
 		container_of(hw, struct rockchip_usb2phy, clk480m_hw);
-	struct regmap *base = get_reg_base(rphy);
 
 	/* turn off 480m clk output */
-	property_enable(base, &rphy->phy_cfg->clkout_ctl, false);
+	property_enable(rphy->grf, &rphy->phy_cfg->clkout_ctl, false);
 }
 
 static int rockchip_usb2phy_clk480m_prepared(struct clk_hw *hw)
 {
 	struct rockchip_usb2phy *rphy =
 		container_of(hw, struct rockchip_usb2phy, clk480m_hw);
-	struct regmap *base = get_reg_base(rphy);
 
-	return property_enabled(base, &rphy->phy_cfg->clkout_ctl);
+	return property_enabled(rphy->grf, &rphy->phy_cfg->clkout_ctl);
 }
 
 static unsigned long
@@ -574,7 +564,6 @@ static int rockchip_usb2phy_power_on(str
 {
 	struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 	struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
-	struct regmap *base = get_reg_base(rphy);
 	int ret;
 
 	dev_dbg(&rport->phy->dev, "port power on\n");
@@ -586,7 +575,7 @@ static int rockchip_usb2phy_power_on(str
 	if (ret)
 		return ret;
 
-	ret = property_enable(base, &rport->port_cfg->phy_sus, false);
+	ret = property_enable(rphy->grf, &rport->port_cfg->phy_sus, false);
 	if (ret) {
 		clk_disable_unprepare(rphy->clk480m);
 		return ret;
@@ -615,7 +604,6 @@ static int rockchip_usb2phy_power_off(st
 {
 	struct rockchip_usb2phy_port *rport = phy_get_drvdata(phy);
 	struct rockchip_usb2phy *rphy = dev_get_drvdata(phy->dev.parent);
-	struct regmap *base = get_reg_base(rphy);
 	int ret;
 
 	dev_dbg(&rport->phy->dev, "port power off\n");
@@ -623,7 +611,7 @@ static int rockchip_usb2phy_power_off(st
 	if (rport->suspended)
 		return 0;
 
-	ret = property_enable(base, &rport->port_cfg->phy_sus, true);
+	ret = property_enable(rphy->grf, &rport->port_cfg->phy_sus, true);
 	if (ret)
 		return ret;
 
@@ -787,28 +775,22 @@ static const char *chg_to_string(enum po
 static void rockchip_chg_enable_dcd(struct rockchip_usb2phy *rphy,
 				    bool en)
 {
-	struct regmap *base = get_reg_base(rphy);
-
-	property_enable(base, &rphy->phy_cfg->chg_det.rdm_pdwn_en, en);
-	property_enable(base, &rphy->phy_cfg->chg_det.idp_src_en, en);
+	property_enable(rphy->grf, &rphy->phy_cfg->chg_det.rdm_pdwn_en, en);
+	property_enable(rphy->grf, &rphy->phy_cfg->chg_det.idp_src_en, en);
 }
 
 static void rockchip_chg_enable_primary_det(struct rockchip_usb2phy *rphy,
 					    bool en)
 {
-	struct regmap *base = get_reg_base(rphy);
-
-	property_enable(base, &rphy->phy_cfg->chg_det.vdp_src_en, en);
-	property_enable(base, &rphy->phy_cfg->chg_det.idm_sink_en, en);
+	property_enable(rphy->grf, &rphy->phy_cfg->chg_det.vdp_src_en, en);
+	property_enable(rphy->grf, &rphy->phy_cfg->chg_det.idm_sink_en, en);
 }
 
 static void rockchip_chg_enable_secondary_det(struct rockchip_usb2phy *rphy,
 					      bool en)
 {
-	struct regmap *base = get_reg_base(rphy);
-
-	property_enable(base, &rphy->phy_cfg->chg_det.vdm_src_en, en);
-	property_enable(base, &rphy->phy_cfg->chg_det.idp_sink_en, en);
+	property_enable(rphy->grf, &rphy->phy_cfg->chg_det.vdm_src_en, en);
+	property_enable(rphy->grf, &rphy->phy_cfg->chg_det.idp_sink_en, en);
 }
 
 #define CHG_DCD_POLL_TIME	(100 * HZ / 1000)
@@ -820,7 +802,6 @@ static void rockchip_chg_detect_work(str
 	struct rockchip_usb2phy_port *rport =
 		container_of(work, struct rockchip_usb2phy_port, chg_work.work);
 	struct rockchip_usb2phy *rphy = dev_get_drvdata(rport->phy->dev.parent);
-	struct regmap *base = get_reg_base(rphy);
 	bool is_dcd, tmout, vout, vbus_attach;
 	unsigned long delay;
 
@@ -834,7 +815,7 @@ static void rockchip_chg_detect_work(str
 			rockchip_usb2phy_power_off(rport->phy);
 		/* put the controller in non-driving mode */
 		if (!vbus_attach)
-			property_enable(base, &rphy->phy_cfg->chg_det.opmode, false);
+			property_enable(rphy->grf, &rphy->phy_cfg->chg_det.opmode, false);
 		/* Start DCD processing stage 1 */
 		rockchip_chg_enable_dcd(rphy, true);
 		rphy->chg_state = USB_CHG_STATE_WAIT_FOR_DCD;
@@ -898,7 +879,7 @@ static void rockchip_chg_detect_work(str
 	case USB_CHG_STATE_DETECTED:
 		/* put the controller in normal mode */
 		if (!vbus_attach)
-			property_enable(base, &rphy->phy_cfg->chg_det.opmode, true);
+			property_enable(rphy->grf, &rphy->phy_cfg->chg_det.opmode, true);
 		rockchip_usb2phy_otg_sm_work(&rport->otg_sm_work.work);
 		dev_dbg(&rport->phy->dev, "charger = %s\n",
 			 chg_to_string(rphy->chg_type));
@@ -1353,29 +1334,14 @@ static int rockchip_usb2phy_probe(struct
 	if (!rphy)
 		return -ENOMEM;
 
-	if (!dev->parent || !dev->parent->of_node) {
+	if (!dev->parent || !dev->parent->of_node ||
+	    of_property_present(np, "rockchip,usbgrf")) {
 		rphy->grf = syscon_regmap_lookup_by_phandle(np, "rockchip,usbgrf");
-		if (IS_ERR(rphy->grf)) {
-			dev_err(dev, "failed to locate usbgrf\n");
-			return PTR_ERR(rphy->grf);
-		}
-	}
-
-	else {
-		rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
-		if (IS_ERR(rphy->grf))
-			return PTR_ERR(rphy->grf);
-	}
-
-	if (of_device_is_compatible(np, "rockchip,rv1108-usb2phy")) {
-		rphy->usbgrf =
-			syscon_regmap_lookup_by_phandle(dev->of_node,
-							"rockchip,usbgrf");
-		if (IS_ERR(rphy->usbgrf))
-			return PTR_ERR(rphy->usbgrf);
 	} else {
-		rphy->usbgrf = NULL;
+		rphy->grf = syscon_node_to_regmap(dev->parent->of_node);
 	}
+	if (IS_ERR(rphy->grf))
+		return PTR_ERR(rphy->grf);
 
 	if (of_property_read_u32_index(np, "reg", 0, &reg)) {
 		dev_err(dev, "the reg property is not assigned in %pOFn node\n",
