openwrt/target/linux/rockchip/patches-6.6/051-03-v6.11-arm64-dts-rockchip-add-but-disabled-SFC-node-for-Radxa.patch

From 00224650dd45e166ea6eb1593f5f064583963ccf Mon Sep 17 00:00:00 2001
From: FUKAUMI Naoki <naoki@radxa.com>
Date: Sun, 23 Jun 2024 11:33:28 +0900
Subject: [PATCH] arm64: dts: rockchip: add (but disabled) SFC node for Radxa
 ROCK 5A

This commit adds SFC node for Radxa ROCK 5A.

since sdhci and sfc on RK3588s share pins(i.e. exclusive), it cannot
be enabled both nodes at the same time. so status = "okay" is omitted
here.

you may be able to enable sfc (and disable sdhci) by fdt overlay.

SPI NOR flash chip may vary, so use safe(lowest) spi-max-frequency.

Signed-off-by: FUKAUMI Naoki <naoki@radxa.com>
Link: https://lore.kernel.org/r/20240623023329.1044-2-naoki@radxa.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
---
 arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts | 13 +++++++++++++
 1 file changed, 13 insertions(+)

--- a/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3588s-rock-5a.dts
@@ -376,6 +376,19 @@
 	status = "okay";
 };
 
+&sfc {
+	pinctrl-names = "default";
+	pinctrl-0 = <&fspim0_pins>;
+
+	flash@0 {
+		compatible = "jedec,spi-nor";
+		reg = <0>;
+		spi-max-frequency = <104000000>;
+		spi-rx-bus-width = <4>;
+		spi-tx-bus-width = <1>;
+	};
+};
+
 &spi2 {
 	status = "okay";
 	assigned-clocks = <&cru CLK_SPI2>;