AXS10x: add spi flash support

AXS10x boards have n25q512 spi flash IC, so add corresponding
nodes to device tree and enaple corresponding options in
defconfig.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Alexey Brodkin <abrodkin@synopsys.com>

arch/arc/dts/axs10x_mb.dtsi

@@ -4,6 +4,10 @@
  */
 
 / {
+	aliases {
+		spi0 = &spi0;
+	};
+
 	axs10x_mb@e0000000 {
 		compatible = "simple-bus";
 		#address-cells = <1>;
@@ -56,5 +60,35 @@
 			reg-shift = <2>;
 			reg-io-width = <4>;
 		};
+
+		spi0: spi@0 {
+			compatible = "snps,dw-apb-ssi";
+			reg = <0x0 0x100>;
+			#address-cells = <1>;
+			#size-cells = <0>;
+			spi-max-frequency = <4000000>;
+			clocks = <&apbclk>;
+			clock-names = "spi_clk";
+			cs-gpio = <&cs_gpio 0>;
+			spi_flash@0 {
+				compatible = "spi-flash";
+				reg = <0>;
+				spi-max-frequency = <4000000>;
+			};
+		};
+
+		cs_gpio: gpio@11218 {
+			compatible = "snps,creg-gpio";
+			reg = <0x11218 0x4>;
+			gpio-controller;
+			#gpio-cells = <1>;
+			gpio-bank-name = "axs-spi-cs";
+			gpio-count = <1>;
+			gpio-first-shift = <0>;
+			gpio-bit-per-line = <2>;
+			gpio-activate-val = <1>;
+			gpio-deactivate-val = <3>;
+			gpio-default-val = <1>;
+		};
 	};
 };

configs/axs101_defconfig

@@ -15,6 +15,8 @@ CONFIG_SYS_PROMPT="AXS# "
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y
 CONFIG_CMD_NAND=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
@@ -30,8 +32,15 @@ CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
+CONFIG_DM_GPIO=y
+CONFIG_HSDK_CREG_GPIO=y
 CONFIG_MMC=y
 CONFIG_MMC_DW=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_MTD=y
 CONFIG_DM_ETH=y
 CONFIG_PHY_GIGE=y
 CONFIG_ETH_DESIGNWARE=y
@@ -39,6 +48,9 @@ CONFIG_DM_SERIAL=y
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_DESIGNWARE_SPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_EHCI_HCD=y

configs/axs103_defconfig

@@ -15,6 +15,8 @@ CONFIG_SYS_PROMPT="AXS# "
 # CONFIG_CMD_FLASH is not set
 CONFIG_CMD_MMC=y
 CONFIG_CMD_NAND=y
+CONFIG_CMD_SF=y
+CONFIG_CMD_SPI=y
 CONFIG_CMD_USB=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_CMD_DHCP=y
@@ -30,8 +32,15 @@ CONFIG_ENV_FAT_INTERFACE="mmc"
 CONFIG_ENV_FAT_DEVICE_AND_PART="0:1"
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_DM=y
+CONFIG_DM_GPIO=y
+CONFIG_HSDK_CREG_GPIO=y
 CONFIG_MMC=y
 CONFIG_MMC_DW=y
+CONFIG_DM_SPI_FLASH=y
+CONFIG_SPI_FLASH=y
+CONFIG_SPI_FLASH_BAR=y
+CONFIG_SPI_FLASH_STMICRO=y
+CONFIG_SPI_FLASH_MTD=y
 CONFIG_DM_ETH=y
 CONFIG_PHY_GIGE=y
 CONFIG_ETH_DESIGNWARE=y
@@ -39,6 +48,9 @@ CONFIG_DM_SERIAL=y
 CONFIG_DEBUG_UART_SHIFT=2
 CONFIG_DEBUG_UART_ANNOUNCE=y
 CONFIG_SYS_NS16550=y
+CONFIG_SPI=y
+CONFIG_DM_SPI=y
+CONFIG_DESIGNWARE_SPI=y
 CONFIG_USB=y
 CONFIG_DM_USB=y
 CONFIG_USB_OHCI_HCD=y