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

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>

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 7b5f3904ef6104754d8d2bc6c96ab668e5b3b230..03d6d920446ab989ccc64286d7a93e475a801154 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>;