arm64: dts: rockchip: change spdif fallback compatible on rk3308

A test with the command below shows that the compatible string

"rockchip,rk3308-spdif", "rockchip,rk3328-spdif"

is already in use, but is not added to a document.
The current fallback string "rockchip,rk3328-spdif" points to a data
set enum RK_SPDIF_RK3366 in rockchip_spdif.c that is not used both
in the mainline as in the manufacturer kernel.
(Of the enum only RK_SPDIF_RK3288 is used.)
So if the properties don't change we might as well use the first SoC
in line as fallback string and add the description for rk3308 as:

"rockchip,rk3308-spdif", "rockchip,rk3066-spdif"

make ARCH=arm64 dtbs_check
DT_SCHEMA_FILES=Documentation/devicetree/bindings/sound/rockchip-spdif.yaml

Signed-off-by: Johan Jonker <jbx6244@gmail.com>
Link: https://lore.kernel.org/r/20200818143727.5882-2-jbx6244@gmail.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

diff --git a/arch/arm64/boot/dts/rockchip/rk3308.dtsi b/arch/arm64/boot/dts/rockchip/rk3308.dtsi
index e8b754d..2560b98 100644 (file)
--- a/arch/arm64/boot/dts/rockchip/rk3308.dtsi
+++ b/arch/arm64/boot/dts/rockchip/rk3308.dtsi
@@ -574,7 +574,7 @@
        };
 
        spdif_tx: spdif-tx@ff3a0000 {
-               compatible = "rockchip,rk3308-spdif", "rockchip,rk3328-spdif";
+               compatible = "rockchip,rk3308-spdif", "rockchip,rk3066-spdif";
                reg = <0x0 0xff3a0000 0x0 0x1000>;
                interrupts = <GIC_SPI 55 IRQ_TYPE_LEVEL_HIGH>;
                clocks = <&cru SCLK_SPDIF_TX>, <&cru HCLK_SPDIFTX>;