arm64: dts: hisilicon: hi3670: Add MMC controller support

Add MMC controller support for HiSilicon HI3670 SoC reusing the HI3660
Designware MMC driver. There are 2 DWMMC controllers present in this SoC:

1. DWMMC1 is used for SD card (SD)
2. DWMMC2 is used for WiFi (SDIO)
Signed-off-by: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi3670.dtsi

@@ -654,5 +654,42 @@ gpio28: gpio@fff1d000 {
 			clocks = <&sctrl HI3670_PCLK_AO_GPIO6>;
 			clock-names = "apb_pclk";
 		};
+
+		/* SD */
+		dwmmc1: dwmmc1@ff37f000 {
+			compatible = "hisilicon,hi3670-dw-mshc",
+				     "hisilicon,hi3660-dw-mshc";
+			reg = <0x0 0xff37f000 0x0 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 139 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&crg_ctrl HI3670_CLK_GATE_SD>,
+				<&crg_ctrl HI3670_HCLK_GATE_SD>;
+			clock-names = "ciu", "biu";
+			clock-frequency = <3200000>;
+			resets = <&crg_rst 0x94 18>;
+			reset-names = "reset";
+			hisilicon,peripheral-syscon = <&sctrl>;
+			card-detect-delay = <200>;
+			status = "disabled";
+		};
+
+		/* SDIO */
+		dwmmc2: dwmmc2@fc183000 {
+			compatible = "hisilicon,hi3670-dw-mshc",
+				     "hisilicon,hi3660-dw-mshc";
+			reg = <0x0 0xfc183000 0x0 0x1000>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			interrupts = <GIC_SPI 140 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&crg_ctrl HI3670_CLK_GATE_SDIO>,
+				<&crg_ctrl HI3670_HCLK_GATE_SDIO>;
+			clock-names = "ciu", "biu";
+			clock-frequency = <3200000>;
+			resets = <&crg_rst 0x94 20>;
+			reset-names = "reset";
+			card-detect-delay = <200>;
+			status = "disabled";
+		};
 	};
 };