imx: mx6ull-14x14-evk: enable DM QSPI driver

To support QSPI DM driver
 - Add spi0 alias for qspi node. Which is used for bus number 0.
 - Modify the n25q256a@0 compatible property to "spi-flash".
 - Modify spi4 (gpio_spi) node to spi5
 - Define DM SPI/QSPI related config to enable QSPI

Signed-off-by: Peng Fan <peng.fan@nxp.com>

arch/arm/dts/imx6ull-14x14-evk.dts

@@ -67,7 +67,7 @@
 		};
 	};
 
-	spi4 {
+	spi5 {
 		compatible = "spi-gpio";
 		pinctrl-names = "default";
 		pinctrl-0 = <&pinctrl_spi4>;
@@ -455,7 +455,8 @@
 	flash0: n25q256a@0 {
 		#address-cells = <1>;
 		#size-cells = <1>;
-		compatible = "micron,n25q256a";
+		/* compatible = "micron,n25q256a"; */
+		compatible = "spi-flash";
 		spi-max-frequency = <29000000>;
 		spi-nor,ddr-quad-read-dummy = <6>;
 		reg = <0>;

arch/arm/dts/imx6ull.dtsi

@@ -38,10 +38,11 @@
 		serial5 = &uart6;
 		serial6 = &uart7;
 		serial7 = &uart8;
-		spi0 = &ecspi1;
-		spi1 = &ecspi2;
-		spi2 = &ecspi3;
-		spi3 = &ecspi4;
+		spi0 = &qspi;
+		spi1 = &ecspi1;
+		spi2 = &ecspi2;
+		spi3 = &ecspi3;
+		spi4 = &ecspi4;
 		usbphy0 = &usbphy1;
 		usbphy1 = &usbphy2;
 	};

configs/mx6ull_14x14_evk_defconfig

@@ -10,6 +10,7 @@ CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
@@ -24,7 +25,12 @@ CONFIG_DM_GPIO=y
 CONFIG_DM_74X164=y
 CONFIG_DM_I2C=y
 CONFIG_DM_MMC=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_SPI=y
+CONFIG_FSL_QSPI=y

configs/mx6ull_14x14_evk_plugin_defconfig

@@ -11,6 +11,7 @@ CONFIG_CMD_MEMTEST=y
 CONFIG_CMD_GPIO=y
 CONFIG_CMD_I2C=y
 CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
 CONFIG_CMD_CACHE=y
@@ -25,7 +26,12 @@ CONFIG_DM_GPIO=y
 CONFIG_DM_74X164=y
 CONFIG_DM_I2C=y
 CONFIG_DM_MMC=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_STMICRO=y
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_IMX6=y
 CONFIG_DM_REGULATOR=y
 CONFIG_DM_SPI=y
+CONFIG_FSL_QSPI=y

include/configs/mx6ullevk.h

@@ -164,4 +164,14 @@
 
 #define CONFIG_SOFT_SPI
 
+#ifdef CONFIG_FSL_QSPI
+#define CONFIG_SYS_FSL_QSPI_AHB
+#define CONFIG_SF_DEFAULT_BUS		0
+#define CONFIG_SF_DEFAULT_CS		0
+#define CONFIG_SF_DEFAULT_SPEED	40000000
+#define CONFIG_SF_DEFAULT_MODE		SPI_MODE_0
+#define FSL_QSPI_FLASH_NUM		1
+#define FSL_QSPI_FLASH_SIZE		SZ_32M
+#endif
+
 #endif