arm64: dts: rockchip: Enable SPI NOR flash on Rock64

The Pine64 Rock64 board comes with a GigaDevice GD25Q128CSIG
or GD25Q127CSIG chip, which is a 128 Mbit SPI NOR flash chip
that supports the JEDEC read-ID command.

This patch enables the SPI controller and adds a device node
for the flash chip using the generic "jedec,spi-nor" comaptible.

Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
index 9ee4f57..2170cf6 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
+++ b/arch/arm64/boot/dts/rockchip/rk3328-rock64.dts
@@ -290,6 +290,18 @@
        };
 };
 
+&spi0 {
+       status = "okay";
+
+       spiflash@0 {
+               compatible = "jedec,spi-nor";
+               reg = <0>;
+
+               /* maximum speed for Rockchip SPI */
+               spi-max-frequency = <50000000>;
+       };
+};
+
 &tsadc {
        rockchip,hw-tshut-mode = <0>;
        rockchip,hw-tshut-polarity = <0>;