[U-Boot] [PATCH V4 2/9] EXYNOS5: FDT: Add DWMMC device node data

[Amar]

This patch adds DWMMC device node data for exynos5.
This patch also adds binding file for DWMMC device node.

Changes from V1:
	1)Added binding file for DWMMC device node at the location
	"doc/device-tree-bindings/exynos/dwmmc.txt".
	2)Removed the propname 'index' from device node.
	3)Prefixed the vendor name 'samsung' before propname in device node.

Changes from V2:
	1)Updation of commit message and resubmition of proper patch set.

Changes from V3:
        No change.

Signed-off-by: Vivek Gautam <gautam.vivek at samsung.com>
Signed-off-by: Amar <amarendra.xt at samsung.com>X
---
 arch/arm/dts/exynos5250.dtsi              | 32 +++++++++++++++++++++++++++++++
 board/samsung/dts/exynos5250-smdk5250.dts | 22 +++++++++++++++++++++
 doc/device-tree-bindings/exynos/dwmmc.txt | 29 ++++++++++++++++++++++++++++
 3 files changed, 83 insertions(+)
 create mode 100644 doc/device-tree-bindings/exynos/dwmmc.txt

diff --git a/arch/arm/dts/exynos5250.dtsi b/arch/arm/dts/exynos5250.dtsi
index 1008797..b701ae5 100644
--- a/arch/arm/dts/exynos5250.dtsi
+++ b/arch/arm/dts/exynos5250.dtsi
@@ -138,4 +138,36 @@
 		reg = <0x131b0000 0x30>;
 		interrupts = <0 130 0>;
 	};
+
+	dwmmc at 12200000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "samsung,exynos5250-dwmmc";
+		reg = <0x12200000 0x1000>;
+		interrupts = <0 75 0>;
+	};
+
+	dwmmc at 12210000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "samsung,exynos5250-dwmmc";
+		reg = <0x12210000 0x1000>;
+		interrupts = <0 76 0>;
+	};
+
+	dwmmc at 12220000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "samsung,exynos5250-dwmmc";
+		reg = <0x12220000 0x1000>;
+		interrupts = <0 77 0>;
+	};
+
+	dwmmc at 12230000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "samsung,exynos5250-dwmmc";
+		reg = <0x12230000 0x1000>;
+		interrupts = <0 78 0>;
+	};
 };
diff --git a/board/samsung/dts/exynos5250-smdk5250.dts b/board/samsung/dts/exynos5250-smdk5250.dts
index a8e62da..9baf622 100644
--- a/board/samsung/dts/exynos5250-smdk5250.dts
+++ b/board/samsung/dts/exynos5250-smdk5250.dts
@@ -30,6 +30,10 @@
 		spi2 = "/spi at 12d40000";
 		spi3 = "/spi at 131a0000";
 		spi4 = "/spi at 131b0000";
+		dwmmc0 = "/dwmmc at 12200000";
+		dwmmc1 = "/dwmmc at 12210000";
+		dwmmc2 = "/dwmmc at 12220000";
+		dwmmc3 = "/dwmmc at 12230000";
 	};
 
 	sromc at 12250000 {
@@ -59,4 +63,22 @@
 			compatible = "wolfson,wm8994-codec";
 		};
 	};
+
+	dwmmc at 12200000 {
+		samsung,bus-width = <8>;
+		samsung,timing = <1 3 3>;
+	};
+
+	dwmmc at 12210000 {
+		status = "disabled";
+	};
+
+	dwmmc at 12220000 {
+		samsung,bus-width = <4>;
+		samsung,timing = <1 2 3>;
+	};
+
+	dwmmc at 12230000 {
+		status = "disabled";
+	};
 };
diff --git a/doc/device-tree-bindings/exynos/dwmmc.txt b/doc/device-tree-bindings/exynos/dwmmc.txt
new file mode 100644
index 0000000..6232ad6
--- /dev/null
+++ b/doc/device-tree-bindings/exynos/dwmmc.txt
@@ -0,0 +1,29 @@
+* Exynos 5250 DWC_mobile_storage
+
+The Exynos 5250 provides DWC_mobile_storage interface which supports
+. Embedded Multimedia Cards (EMMC-version 4.5)
+. Secure Digital memory (SD mem-version 2.0)
+. Secure Digital I/O (SDIO-version 3.0)
+. Consumer Electronics Advanced Transport Architecture (CE-ATA-version 1.1)
+
+The Exynos 5250 DWC_mobile_storage provides four channels.
+SOC specific and Board specific properties are channel specific.
+
+Required SoC Specific Properties:
+
+- compatible: should be
+	- samsung,exynos5250-dwmmc: for exynos5250 platforms
+
+- reg: physical base address of the controller and length of memory mapped
+	region.
+
+- interrupts: The interrupt number to the cpu.
+
+Required Board Specific Properties:
+
+- #address-cells: should be 1.
+- #size-cells: should be 0.
+- samsung,bus-width: The width of the bus used to interface the devices
+	supported by DWC_mobile_storage (SD-MMC/EMMC/SDIO).
+- samsung,timing: The timing values to be written into the
+	Drv/sample clock selection register of corresponding channel.
-- 
1.8.0