nds32: board: Support SPI driver.

Add spi dts node and enable spi dm flash config.

Signed-off-by: rick <rick@andestech.com>

arch/nds32/dts/ae3xx.dts

@@ -8,6 +8,7 @@
 	aliases {
 		uart0 = &serial0;
 		ethernet0 = &mac0;
+		spi0 = &spi;
 	} ;
 
 	chosen {
@@ -22,6 +23,12 @@
 		reg = <0x00000000 0x40000000>;
 	};
 
+	spiclk: virt_100mhz {
+		#clock-cells = <0>;
+		compatible = "fixed-clock";
+		clock-frequency = <100000000>;
+	};
+
 	cpus {
 		#address-cells = <1>;
 		#size-cells = <0>;
@@ -69,4 +76,20 @@
 		device-width = <1>;
 	};
 
+	spi: spi@f0b00000 {
+		compatible = "andestech,atcspi200";
+		reg = <0xf0b00000 0x1000>;
+		#address-cells = <1>;
+		#size-cells = <0>;
+		num-cs = <1>;
+		clocks = <&spiclk>;
+		interrupts = <3 4>;
+			flash@0 {
+			compatible = "spi-flash";
+			spi-max-frequency = <50000000>;
+			reg = <0>;
+			spi-cpol;
+			spi-cpha;
+		};
+	};
 };

configs/adp-ae3xx_defconfig

@@ -5,6 +5,8 @@ CONFIG_FIT=y
 CONFIG_BOOTDELAY=3
 CONFIG_SYS_PROMPT="NDS32 # "
 CONFIG_CMD_MMC=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SF_TEST=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
 CONFIG_CMD_PING=y
@@ -13,17 +15,23 @@ CONFIG_CMD_DATE=y
 CONFIG_CMD_EXT2=y
 CONFIG_CMD_FAT=y
 CONFIG_OF_CONTROL=y
-CONFIG_ENV_IS_IN_FLASH=y
+CONFIG_ENV_IS_IN_SPI_FLASH=y
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
+CONFIG_CLK=y
 CONFIG_MMC=y
 CONFIG_MTD=y
 CONFIG_MTD_NOR_FLASH=y
 CONFIG_CFI_FLASH=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_MACRONIX=y
 CONFIG_DM_ETH=y
 CONFIG_FTMAC100=y
 CONFIG_BAUDRATE=38400
 CONFIG_DM_SERIAL=y
 CONFIG_SYS_NS16550=y
+CONFIG_DM_SPI=y
+CONFIG_NDS_AE3XX_SPI=y
 CONFIG_TIMER=y
 CONFIG_AE3XX_TIMER=y

include/configs/adp-ae3xx.h

@@ -220,14 +220,25 @@
 
 /* max number of sectors on one chip */
 #define CONFIG_FLASH_SECTOR_SIZE	(0x10000*2)
-#define CONFIG_ENV_SECT_SIZE		CONFIG_FLASH_SECTOR_SIZE
 #define CONFIG_SYS_MAX_FLASH_SECT	512
 
 /* environments */
-#define CONFIG_ENV_ADDR			(CONFIG_SYS_MONITOR_BASE + 0x140000)
+#define CONFIG_ENV_SPI_BUS		0
+#define CONFIG_ENV_SPI_CS		0
+#define CONFIG_ENV_SPI_MAX_HZ		50000000
+#define CONFIG_ENV_SPI_MODE		0
+#define CONFIG_ENV_SECT_SIZE		0x1000
+#define CONFIG_ENV_OFFSET		0x140000
 #define CONFIG_ENV_SIZE			8192
 #define CONFIG_ENV_OVERWRITE
 
+
+/* SPI FLASH */
+#define CONFIG_SF_DEFAULT_BUS		0
+#define CONFIG_SF_DEFAULT_CS		0
+#define CONFIG_SF_DEFAULT_SPEED		1000000
+#define CONFIG_SF_DEFAULT_MODE		0
+
 /*
  * For booting Linux, the board info and command line data
  * have to be in the first 16 MB of memory, since this is