commit 1b79951ca113c30ee2078fc795687e3bc2e740c8
author Jagan Teki <jagan@amarulasolutions.com> Fri Feb 17 17:28:39 2023 +0530
committer Kever Yang <kever.yang@rock-chips.com> Tue Feb 28 18:07:27 2023 +0800
tree 091c5d60df2f410b0528faaa2430d577638074a3
parent b37164763a0669c881058da5e2e34961e19fe008

phy: rockchip: inno-usb2: Add support #address_cells = 2

New Rockchip devices have the usb phy nodes as standalone devices.
These nodes have register nodes with #address_cells = 2, but only
use 32 bit addresses.

Adjust the driver to check if the returned address is "0", and adjust
the index in that case.

Derived and adjusted the similar change from linux-next with below
 commit <9c19c531dc98> ("phy: phy-rockchip-inno-usb2: support
 #address_cells = 2")

Co-developed-by: Manoj Sai <abbaraju.manojsai@amarulasolutions.com>
Signed-off-by: Manoj Sai <abbaraju.manojsai@amarulasolutions.com>
Signed-off-by: Jagan Teki <jagan@amarulasolutions.com>
Reviewed-by: Kever Yang <kever.yang@rock-chips.com>

drivers/phy/rockchip/phy-rockchip-inno-usb2.c

diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
index b32a498..a01148d 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
@@ -179,12 +179,21 @@
 	if (IS_ERR(priv->reg_base))
 		return PTR_ERR(priv->reg_base);
 
-	ret = ofnode_read_u32(dev_ofnode(dev), "reg", &reg);
+	ret = ofnode_read_u32_index(dev_ofnode(dev), "reg", 0, &reg);
 	if (ret) {
 		dev_err(dev, "failed to read reg property (ret = %d)\n", ret);
 		return ret;
 	}
 
+	/* support address_cells=2 */
+	if (reg == 0) {
+		if (ofnode_read_u32_index(dev_ofnode(dev), "reg", 1, &reg)) {
+			dev_err(dev, "%s must have reg[1]\n",
+				ofnode_get_name(dev_ofnode(dev)));
+			return -EINVAL;
+		}
+	}
+
 	phy_cfgs = (const struct rockchip_usb2phy_cfg *)
 					dev_get_driver_data(dev);
 	if (!phy_cfgs)