arm64: dts: rockchip: Add SPI NOR device on the ROCK 4D

The SPI NOR chip is connected on the FSPI0 core, so enable the sfc0 node
and add the flash device to it.

The SPI NOR won't work at higher speed than 50 MHz, specify the limit.

Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>
Link: https://lore.kernel.org/r/20250228145304.581349-3-detlev.casanova@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
index 0ba0be98075452205993a326ae1c0a3c8535099e..6756403111e704cad42f6674d5ab55eb0306f1e3 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3576-rock-4d.dts
@@ -701,6 +701,22 @@
        status = "okay";
 };
 
+
+&sfc0 {
+       pinctrl-names = "default";
+       pinctrl-0 = <&fspi0_pins &fspi0_csn0>;
+       status = "okay";
+
+       flash@0 {
+               compatible = "jedec,spi-nor";
+               reg = <0>;
+               spi-max-frequency = <50000000>;
+               spi-rx-bus-width = <4>;
+               spi-tx-bus-width = <1>;
+               vcc-supply = <&vcc_1v8_s3>;
+       };
+};
+
 &u2phy0 {
        status = "okay";
 };