kernel: enable spidev

build/boards/cv180x/cv1800b_milkv_duo_sd/dts_riscv/cv1800b_milkv_duo_sd.dts

@@ -8,6 +8,14 @@
 	snsr-reset = <&portc 8 GPIO_ACTIVE_LOW>, <&portc 8 GPIO_ACTIVE_LOW>, <&portc 8 GPIO_ACTIVE_LOW>;
 };
 
+&spi2 {
+	status = "okay";
+
+	spidev@0 {
+		status = "okay";
+	};
+};
+
 / {
 
 };

build/boards/cv180x/cv1800b_milkv_duo_sd/linux/cvitek_cv1800b_milkv_duo_sd_defconfig

@@ -124,6 +124,10 @@ CONFIG_I2C_CHARDEV=y
 CONFIG_I2C_MUX=y
 CONFIG_I2C_DESIGNWARE_PLATFORM=y
 CONFIG_SPI=y
+CONFIG_SPI_MASTER=y
+CONFIG_SPI_DESIGNWARE=y
+CONFIG_SPI_DW_MMIO=y
+CONFIG_SPI_SPIDEV=y
 # CONFIG_PTP_1588_CLOCK is not set
 CONFIG_PINCTRL=y
 CONFIG_CVITEK_PINCTRL_CV1835=y

build/boards/cv180x/cv1800b_milkv_duo_sd/u-boot/cvi_board_init.c

@@ -15,13 +15,12 @@ int cvi_board_init(void)
 	PINMUX_CONFIG(SPINOR_CS_X, XGPIOA_24);
 	PINMUX_CONFIG(IIC0_SDA, XGPIOA_29);
 	PINMUX_CONFIG(IIC0_SCL, XGPIOA_28);
-	// sd1
-	PINMUX_CONFIG(SD1_D3, PWR_GPIO_18);
-	PINMUX_CONFIG(SD1_D2, PWR_GPIO_19);
-	PINMUX_CONFIG(SD1_D1, PWR_GPIO_20);
-	PINMUX_CONFIG(SD1_D0, PWR_GPIO_21);
-	PINMUX_CONFIG(SD1_CMD, PWR_GPIO_22);
-	PINMUX_CONFIG(SD1_CLK, PWR_GPIO_23);
+
+	// SPI
+	PINMUX_CONFIG(SD1_CLK, SPI2_SCK);
+	PINMUX_CONFIG(SD1_CMD, SPI2_SDO);
+	PINMUX_CONFIG(SD1_D0, SPI2_SDI);
+	PINMUX_CONFIG(SD1_D3, SPI2_CS_X);
 
 	//default to gpio
 	PINMUX_CONFIG(PAD_MIPIRX1P, XGPIOC_9);