Bl808/i2c

arch/riscv/boot/dts/bouffalolab/bl808-pine64-ox64.dts

@@ -41,12 +41,24 @@
 
 &pinctrl {
 	status = "okay";
+
+	i2c_2_pins: i2c-pins {
+		pins = "GPIO6", "GPIO7";
+		function = "i2c2";
+	};
 };
 
 &seceng {
 	status = "okay";
 };
 
+&i2c2 {
+	status = "okay";
+
+	pinctrl-0 = <&i2c_2_pins>;
+	pinctrl-names = "default";
+};
+
 &uart0 {
 	status = "okay";
 };

arch/riscv/boot/dts/bouffalolab/bl808-sipeed-m1s.dts

@@ -55,12 +55,24 @@
 		pins = "GPIO8";
 		function = "gpio";
 	};
+
+	i2c_2_pins: i2c-pins {
+		pins = "GPIO6", "GPIO7";
+		function = "i2c2";
+	};
 };
 
 &seceng {
 	status = "okay";
 };
 
+&i2c2 {
+	status = "okay";
+
+	pinctrl-0 = <&i2c_2_pins>;
+	pinctrl-names = "default";
+};
+
 &uart0 {
 	status = "okay";
 };

arch/riscv/boot/dts/bouffalolab/bl808.dtsi

@@ -52,6 +52,20 @@
 		#clock-cells = <0>;
 	};
 
+	rc32m: rc32m-clk {
+		compatible = "fixed-clock";
+		clock-frequency = <32000000>;
+		clock-output-names = "rc32m";
+		#clock-cells = <0>;
+	};
+
+	mm_b: mm_bclk1x {
+		compatible = "fixed-clock";
+		clock-frequency = <160000000>;
+		clock-output-names = "mm_b";
+		#clock-cells = <0>;
+	};
+
 	enet: enet-clk {
 		compatible = "fixed-clock";
 		clock-frequency = <50000000>;
@@ -95,6 +109,48 @@
 			reg = <0x20004000 0x1000>;
 			status = "disabled";
 		};
+
+		i2c0: i2c@2000A300 {
+			compatible = "bflb,bl808-i2c";
+			reg = <0x2000A300 0x0100>;
+			interrupts-extended = <&ipclic BFLB_IPC_SOURCE_M0
+								BFLB_IPC_DEVICE_I2C0
+								IRQ_TYPE_EDGE_RISING>;
+			mboxes = <&ipclic BFLB_IPC_SOURCE_M0 BFLB_IPC_DEVICE_I2C0>;
+			clocks = <&rc32m>;
+			clock-frequency = <400000>;
+			status = "disabled";
+		};
+
+		i2c1: i2c@2000A900 {
+			compatible = "bflb,bl808-i2c";
+			reg = <0x2000A900 0x0100>;
+			interrupts-extended = <&ipclic BFLB_IPC_SOURCE_M0
+								BFLB_IPC_DEVICE_I2C1
+								IRQ_TYPE_EDGE_RISING>;
+			mboxes = <&ipclic BFLB_IPC_SOURCE_M0 BFLB_IPC_DEVICE_I2C1>;
+			clocks = <&rc32m>;
+			clock-frequency = <400000>;
+			status = "disabled";
+		};
+
+		i2c2: i2c@30003000 {
+			compatible = "bflb,bl808-i2c";
+			reg = <0x30003000 0x1000>;
+			interrupts = <21 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&mm_b>;
+			clock-frequency = <400000>;
+			status = "disabled";
+		};
+
+		i2c3: i2c@30004000 {
+			compatible = "bflb,bl808-i2c";
+			reg = <0x30004000 0x1000>;
+			interrupts = <22 IRQ_TYPE_LEVEL_HIGH>;
+			clocks = <&mm_b>;
+			clock-frequency = <400000>;
+			status = "disabled";
+		};
 
 		uart0: serial@30002000 {
 			/*Maps to hardware UART 3*/

arch/riscv/configs/bl808_defconfig

@@ -124,12 +124,9 @@ CONFIG_HW_RANDOM=y
 CONFIG_HW_RANDOM_VIRTIO=y
 CONFIG_I2C=y
 CONFIG_I2C_CHARDEV=y
-CONFIG_I2C_XILINX=y
+CONFIG_I2C_BL808=y
 CONFIG_I2C_SLAVE=y
 CONFIG_I2C_SLAVE_EEPROM=y
-CONFIG_I2C_DEBUG_CORE=y
-CONFIG_I2C_DEBUG_ALGO=y
-CONFIG_I2C_DEBUG_BUS=y
 # CONFIG_PTP_1588_CLOCK is not set
 CONFIG_PINCTRL=y
 CONFIG_PINCTRL_BFLB_GPIO=y

drivers/i2c/busses/Kconfig

@@ -1242,6 +1242,16 @@ config I2C_RCAR
 	  This driver can also be built as a module.  If so, the module
 	  will be called i2c-rcar.
 
+config I2C_BL808
+		tristate "Bouffalo Lab BL808 I2C driver"
+		depends on SOC_BOUFFALOLAB
+		help
+		  This driver provides support for the I2C bus
+		  hardware found on Bouffalo Lab BL808 SoCs.
+
+		  To compile this driver as a module, choose M here. The
+	  	  module will be called i2c-bl808. If unsure, say N.
+
 comment "External I2C/SMBus adapter drivers"
 
 config I2C_DIOLAN_U2C

drivers/i2c/busses/Makefile

@@ -47,6 +47,7 @@ obj-$(CONFIG_I2C_AU1550)	+= i2c-au1550.o
 obj-$(CONFIG_I2C_AXXIA)		+= i2c-axxia.o
 obj-$(CONFIG_I2C_BCM2835)	+= i2c-bcm2835.o
 obj-$(CONFIG_I2C_BCM_IPROC)	+= i2c-bcm-iproc.o
+obj-$(CONFIG_I2C_BL808)		+= i2c-bl808.o
 obj-$(CONFIG_I2C_CADENCE)	+= i2c-cadence.o
 obj-$(CONFIG_I2C_CBUS_GPIO)	+= i2c-cbus-gpio.o
 obj-$(CONFIG_I2C_CPM)		+= i2c-cpm.o