arm64: dts: rockchip: set PHY address of MT7531 switch to 0x1f

[ Upstream commit a2ac2a1b02590a22a236c43c455f421cdede45f5 ]

The MT7531 switch listens on PHY address 0x1f on an MDIO bus. I've got two
findings that support this. There's no bootstrapping option to change the
PHY address of the switch. The Linux driver hardcodes 0x1f as the PHY
address of the switch. So the reg property on the device tree is currently
ignored by the Linux driver.

Therefore, describe the correct PHY address on Banana Pi BPI-R2 Pro that
has this switch.

Signed-off-by: Arınç ÜNAL <arinc.unal@arinc9.com>
Fixes: c1804463e5c6 ("arm64: dts: rockchip: Add mt7531 dsa node to BPI-R2-Pro board")
Link: https://lore.kernel.org/r/20240314-for-rockchip-mt7531-phy-address-v1-1-743b5873358f@arinc9.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts b/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts
index f9127ddfbb7dfdaa9b2bfd6040ef9ed2ab1986b3..87c45d8be420f1db2d5c290745ea1c4f5cacb99a 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3568-bpi-r2-pro.dts
@@ -525,9 +525,9 @@
        #address-cells = <1>;
        #size-cells = <0>;
 
-       switch@0 {
+       switch@1f {
                compatible = "mediatek,mt7531";
-               reg = <0>;
+               reg = <0x1f>;
 
                ports {
                        #address-cells = <1>;