Board: Milk-V Duo: Enable pinctrl by default.

Signed-off-by: Yilin Sun <imi415@imi.moe>

arch/riscv/dts/cv1800b-milkv-duo.dts

@@ -20,16 +20,30 @@
 		stdout-path = "serial0:115200n8";
 	};
 
-	memory@0 {
+	memory@80000000 {
 		device_type = "memory";
 		reg = <0x0 0x80000000 0x0 0x03F40000>; /* Offset 0, size: 63.25MB */
 	};
 };
 
+&pinctrl {
+	uart0_pins: uart0 {
+		pinmux = <PINMUX(UART0_TX, UART0_TX)>, <PINMUX(UART0_RX, UART0_RX)>;
+	};
+
+	i2c1_pins: i2c1 {
+		pinmux = <PINMUX(PAD_MIPIRX0N, IIC1_SCL)>, <PINMUX(PAD_MIPIRX1P, IIC1_SDA)>;
+	};
+};
+
 &uart0 {
+	pinctrl-0 = <&uart0_pins>;
+	pinctrl-names = "default";
 	status = "okay";
 };
 
-&i2c0 {
+&i2c1 {
+	pinctrl-0 = <&i2c1_pins>;
+	pinctrl-names = "default";
 	status = "okay";
 };

arch/riscv/dts/cv1800b.dtsi

@@ -75,24 +75,16 @@
 			interrupts-extended = <&cpu0_intc 3>, <&cpu0_intc 7>;
 		};
 
-		pinctrl: pinctrl@03000000 {
+		pinctrl: pinctrl@03001000 {
 			compatible = "cvitek,cv1800b-pinctrl";
-			reg = <0x0 0x03000000 0x0 0x00001000>;
+			reg = <0x0 0x03001000 0x0 0x00001000>;
-
+			pins = <75>;
-			uart0_pins: uart0_pins {
-				pinmux = <PINMUX(UART0_TX, UART0_TX)>, <PINMUX(UART0_RX, UART0_RX)>;
-			};
-
-			i2c0_pins: i2c0_pins {
-				pinmux = <PINMUX(IIC0_SCL, IIC0_SCL)>, <PINMUX(IIC0_SDA, IIC0_SDA)>;
-			};
 		};
 
 		uart0: serial@04140000 {
 			compatible = "cvitek,cv1800b-uart", "snps,dw-apb-uart";
 			reg = <0x0 0x04140000 0x0 0x1000>;
 			interrupts = <44 IRQ_TYPE_LEVEL_HIGH>;
-			pinctrl-0 = <&uart0_pins>;
 			clocks = <&apb_clk>;
 			reg-shift = <2>;
 			reg-io-width = <4>;
@@ -146,5 +138,13 @@
 			clocks = <&apb_clk>;
 			status = "disabled";
 		};
+
+		i2c1: i2c@04010000 {
+			compatible = "cvitek,cv1800b-i2c", "snps,designware-i2c";
+			reg = <0x0 0x04010000 0x0 0x1000>;
+			interrupts = <50 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&apb_clk>;
+			status = "disabled";
+		};
 	};
 };

board/milkv/cv1800b_milkv_duo/Kconfig

@@ -23,6 +23,7 @@ config BOARD_SPECIFIC_OPTIONS
 	imply RISCV_TIMER if RISCV_SMODE
 	imply CMD_CPU
 	imply SUPPORT_OF_CONTROL
+	imply PINCTRL_CV1800B
 	imply OF_CONTROL
 	imply OF_REAL
 endif

configs/cv1800b_milkv_duo_defconfig

@@ -5,7 +5,6 @@ CONFIG_NR_DRAM_BANKS=1
 CONFIG_HAS_CUSTOM_SYS_INIT_SP_ADDR=y
 CONFIG_CUSTOM_SYS_INIT_SP_ADDR=0x80200000
 CONFIG_DEFAULT_DEVICE_TREE="cv1800b-milkv-duo"
-CONFIG_SYS_PROMPT="Milk-V => "
 CONFIG_SYS_LOAD_ADDR=0x80200000
 CONFIG_TARGET_CV1800B_MILKV_DUO=y
 CONFIG_ARCH_RV64I=y
@@ -25,6 +24,7 @@ CONFIG_LOG=y
 CONFIG_DISPLAY_CPUINFO=y
 CONFIG_DISPLAY_BOARDINFO=y
 CONFIG_DISPLAY_BOARDINFO_LATE=y
+CONFIG_SYS_PROMPT="Milk-V => "
 CONFIG_SYS_CBSIZE=256
 CONFIG_SYS_PBSIZE=276
 CONFIG_CMD_CONFIG=y
@@ -66,6 +66,7 @@ CONFIG_SYSCON=y
 # CONFIG_INPUT is not set
 # CONFIG_DM_MMC is not set
 # CONFIG_MTD is not set
+CONFIG_PINCTRL=y
 # CONFIG_POWER is not set
 CONFIG_SYS_NS16550=y
 CONFIG_AES=y

drivers/pinctrl/pinctrl-cv1800b.c

@@ -16,9 +16,10 @@
 #include <linux/bitfield.h>
 #include <linux/bitops.h>
 
-#define CV1800B_PC_CTRL_MAX 128
+/* The maximum address space PINMUX can have is 4kB */
+#define CV1800B_PC_CTRL_MAX 1024
 
-#define CV1800B_PC_FUNC GENMASK(3, 0)
+#define CV1800B_PC_FUNC GENMASK(2, 0)
 
 struct cv1800b_pinmux{
 	u32 ctrl[CV1800B_PC_CTRL_MAX];
@@ -26,17 +27,42 @@ struct cv1800b_pinmux{
 
 struct cv1800b_pc_priv {
 	struct cv1800b_pinmux __iomem *pinmux;
-	uint32_t num_pins;
+	u32 num_pins;
 };
 
-int cv1800b_pc_get_pins_count(struct udevice *dev)
+static int cv1800b_pc_get_pins_count(struct udevice *dev)
 {
 	struct cv1800b_pc_priv *priv = dev_get_priv(dev);
+
+	debug("%s: pin count: %d", __func__, priv->num_pins);
+
 	return priv->num_pins;
 }
 
+static int cv1800b_pc_pinmux_set(struct udevice *dev, u32 pinmux_group)
+{
+	struct cv1800b_pc_priv *priv = dev_get_priv(dev);
+
+	u8 pin = pinmux_group & 0xFFU;
+	u8 func = (pinmux_group >> 8U) & 0xFFU;
+
+	priv->pinmux->ctrl[pin] = (priv->pinmux->ctrl[pin] & ~(CV1800B_PC_FUNC)) | func;
+
+	debug("%s: pin %d, func: %d\n", __func__, pin, func);
+
+	return 0;
+}
+
+static const struct pinconf_param cv1800b_pinconf_params[] = {
+	{ "input-enable", PIN_CONFIG_INPUT_ENABLE, 1 },
+};
+
 static const struct pinctrl_ops cv1800b_pc_pinctrl_ops = {
 	.get_pins_count = cv1800b_pc_get_pins_count,
+	.pinmux_property_set = cv1800b_pc_pinmux_set,
+	.pinconf_num_params = ARRAY_SIZE(cv1800b_pinconf_params),
+	.pinconf_params = cv1800b_pinconf_params,
+	.set_state = pinctrl_generic_set_state,
 };
 
 static int cv1800b_pc_probe(struct udevice *dev)