arm64: dts: add Hi6220 spi configuration nodes

Add Hi6220 spi configuration nodes. Disable by default in hi6220.dtsi
and enable it in board dts for usage of 96boards LS mezzanine board.
Signed-off-by: Zhong Kaihua <zhongkaihua@huawei.com>
Signed-off-by: Guodong Xu <guodong.xu@linaro.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Wei Xu <xuwei5@hisilicon.com>

arch/arm64/boot/dts/hisilicon/hi6220-hikey.dts

@@ -40,6 +40,12 @@ memory@0 {
 		      <0x00000000 0x06e00000 0x00000000 0x0060f000>,
 		      <0x00000000 0x07410000 0x00000000 0x36bf0000>;
 	};
+
+	soc {
+		spi0: spi@f7106000 {
+			status = "ok";
+		};
+	};
 };
 
 &uart2 {

arch/arm64/boot/dts/hisilicon/hi6220.dtsi

@@ -567,5 +567,20 @@ gpio19: gpio@f702f000 {
 			clocks = <&ao_ctrl 2>;
 			clock-names = "apb_pclk";
 		};
+
+		spi0: spi@f7106000 {
+			compatible = "arm,pl022", "arm,primecell";
+			reg = <0x0 0xf7106000 0x0 0x1000>;
+			interrupts = <0 50 4>;
+			bus-id = <0>;
+			enable-dma = <0>;
+			clocks = <&sys_ctrl HI6220_SPI_CLK>;
+			clock-names = "apb_pclk";
+			pinctrl-names = "default";
+			pinctrl-0 = <&spi0_pmx_func &spi0_cfg_func>;
+			num-cs = <1>;
+			cs-gpios = <&gpio6 2 0>;
+			status = "disabled";
+		};
 	};
 };

arch/arm64/boot/dts/hisilicon/hikey-pinctrl.dtsi

@@ -221,6 +221,15 @@ i2c2_pmx_func: i2c2_pmx_func {
 					0xfc   MUX_M0	/* I2C2_SDA     (IOMG063) */
 				>;
 			};
+
+			spi0_pmx_func: spi0_pmx_func {
+				pinctrl-single,pins = <
+					0x1a0  MUX_M1   /* SPI0_DI      (IOMG104) */
+					0x1a4  MUX_M1	/* SPI0_DO	(IOMG105) */
+					0x1a8  MUX_M1	/* SPI0_CS_N	(IOMG106) */
+					0x1ac  MUX_M1	/* SPI0_CLK	(IOMG107) */
+				>;
+			};
 		};
 
 		pmx1: pinmux@f7010800 {
@@ -625,6 +634,18 @@ i2c2_cfg_func: i2c2_cfg_func {
 				pinctrl-single,bias-pullup    = <PULL_DIS  PULL_UP   PULL_DIS  PULL_UP>;
 				pinctrl-single,drive-strength = <DRIVE1_02MA DRIVE_MASK>;
 			};
+
+			spi0_cfg_func: spi0_cfg_func {
+				pinctrl-single,pins = <
+					0x1b0  0x0	/* SPI0_DI	(IOCFG108) */
+					0x1b4  0x0	/* SPI0_DO	(IOCFG109) */
+					0x1b8  0x0	/* SPI0_CS_N	(IOCFG110) */
+					0x1bc  0x0	/* SPI0_CLK	(IOCFG111) */
+				>;
+				pinctrl-single,bias-pulldown  = <PULL_DIS  PULL_DOWN PULL_DIS PULL_DOWN>;
+				pinctrl-single,bias-pullup    = <PULL_DIS  PULL_UP   PULL_DIS PULL_UP>;
+				pinctrl-single,drive-strength = <DRIVE1_02MA DRIVE_MASK>;
+			};
 		};
 
 		pmx2: pinmux@f8001800 {