rockchip: rk3368: dts: add DMC node in rk3368.dtsi

For full SPL support, including DRAM initialisation, we need a few
nodes from the DTS: this commit adds the DMC (DRAM controller) node,
the service_msch (memory scheduler) node and marks GRF, PMUGRF and CRU
as 'u-boot,dm-pre-reloc'.  In addition to this, we also include the
dt-binding for the DMC to allow DTS files including this DTSI to refer
to the symbolic constants for the DDR3 bin and for the
memory-schedule.

Note that the DMC contains both the memory regions for the
(Designware) protocol controller as well as the DDR PHY.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Reviewed-by: Simon Glass <sjg@chromium.org>

arch/arm/dts/rk3368.dtsi

@@ -46,6 +46,7 @@
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 #include <dt-bindings/pinctrl/rockchip.h>
 #include <dt-bindings/thermal/thermal.h>
+#include <dt-bindings/memory/rk3368-dmc.h>
 
 / {
 	compatible = "rockchip,rk3368";
@@ -227,6 +228,22 @@
 		#clock-cells = <0>;
 	};
 
+	dmc: dmc@ff610000 {
+		compatible = "rockchip,rk3368-dmc", "syscon";
+		rockchip,cru = <&cru>;
+		rockchip,grf = <&grf>;
+		rockchip,msch = <&service_msch>;
+		reg = <0 0xff610000 0 0x400
+		       0 0xff620000 0 0x400>;
+	};
+
+	service_msch: syscon@ffac0000 {
+		u-boot,dm-pre-reloc;
+		compatible = "rockchip,rk3368-msch", "syscon";
+		reg = <0x0 0xffac0000 0x0 0x2000>;
+		status = "okay";
+	};
+
 	sdmmc: dwmmc@ff0c0000 {
 		compatible = "rockchip,rk3368-dw-mshc", "rockchip,rk3288-dw-mshc";
 		reg = <0x0 0xff0c0000 0x0 0x4000>;
@@ -546,12 +563,6 @@
 		status = "disabled";
 	};
 
-	dmc: dmc@ff610000 {
-		u-boot,dm-pre-reloc;
-		compatible = "rockchip,rk3368-dmc", "syscon";
-		reg = <0x0 0xff610000 0x0 0x1000>;
-	};
-
 	i2c0: i2c@ff650000 {
 		compatible = "rockchip,rk3368-i2c", "rockchip,rk3288-i2c";
 		reg = <0x0 0xff650000 0x0 0x1000>;
@@ -658,6 +669,7 @@
 	};
 
 	cru: clock-controller@ff760000 {
+		u-boot,dm-pre-reloc;
 		compatible = "rockchip,rk3368-cru";
 		reg = <0x0 0xff760000 0x0 0x1000>;
 		rockchip,grf = <&grf>;
@@ -666,6 +678,7 @@
 	};
 
 	grf: syscon@ff770000 {
+		u-boot,dm-pre-reloc;
 		compatible = "rockchip,rk3368-grf", "syscon";
 		reg = <0x0 0xff770000 0x0 0x1000>;
 	};