ARM: dts: rockchip: add rk3288-based Tinker board S

Add the actual dts for the tinker board S, which brings its own emmc
device, not therefore not requiring an sd-card to boot.
Signed-off-by: David Summers <beagleboard@davidjohnsummers.uk>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>

Documentation/devicetree/bindings/arm/rockchip.txt

@@ -13,6 +13,10 @@ Rockchip platforms device tree bindings
     Required root node properties:
       - compatible = "asus,rk3288-tinker", "rockchip,rk3288";
 
+- Asus Tinker board S
+    Required root node properties:
+      - compatible = "asus,rk3288-tinker-s", "rockchip,rk3288";
+
 - Kylin RK3036 board:
     Required root node properties:
       - compatible = "rockchip,kylin-rk3036", "rockchip,rk3036";

arch/arm/boot/dts/Makefile

@@ -864,6 +864,7 @@ dtb-$(CONFIG_ARCH_ROCKCHIP) += \
 	rk3288-r89.dtb \
 	rk3288-rock2-square.dtb \
 	rk3288-tinker.dtb \
+	rk3288-tinker-s.dtb \
 	rk3288-veyron-brain.dtb \
 	rk3288-veyron-jaq.dtb \
 	rk3288-veyron-jerry.dtb \

arch/arm/boot/dts/rk3288-tinker-s.dts

+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+/*
+ * Copyright (c) 2017 Fuzhou Rockchip Electronics Co., Ltd.
+ */
+
+/dts-v1/;
+
+#include "rk3288-tinker.dtsi"
+
+/ {
+	model = "Rockchip RK3288 Asus Tinker Board S";
+	compatible = "asus,rk3288-tinker-s", "rockchip,rk3288";
+};
+
+&emmc {
+	bus-width = <8>;
+	cap-mmc-highspeed;
+	disable-wp;
+	non-removable;
+	pinctrl-names = "default";
+	pinctrl-0 = <&emmc_clk &emmc_cmd &emmc_pwr &emmc_bus8>;
+	max-frequency = <150000000>;
+	mmc-hs200-1_8v;
+	mmc-ddr-1_8v;
+	status = "okay";
+};