[PATCH 11/12] riscv: dts: thead: Add Lichee Pi 4A IO expansions

[Icenowy Zheng]

From: Emil Renner Berthing <emil.renner.berthing at canonical.com>

Lichee Pi 4A has 3 I2C IO expansion chips onboard, connected to the
I2C0/1/3 busses.

Add device tree nodes for them.

Signed-off-by: Emil Renner Berthing <emil.renner.berthing at canonical.com>
[Icenowy: added commit description]
Signed-off-by: Icenowy Zheng <zhengxingda at iscas.ac.cn>
---
 .../boot/dts/thead/th1520-lichee-pi-4a.dts    | 111 ++++++++++++++++++
 1 file changed, 111 insertions(+)

diff --git a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
index 4198dbf953f06..354f3893aa8cf 100644
--- a/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
+++ b/arch/riscv/boot/dts/thead/th1520-lichee-pi-4a.dts
@@ -16,6 +16,9 @@ aliases {
 		gpio3 = &gpio3;
 		gpio4 = &gpio4;
 		gpio5 = &aogpio;
+		i2c0 = &i2c0;
+		i2c1 = &i2c1;
+		i2c3 = &i2c3;
 		serial0 = &uart0;
 		serial1 = &uart1;
 		serial2 = &uart2;
@@ -110,6 +113,76 @@ hdmi_out_con: endpoint {
 	};
 };
 
+&i2c0 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c0_pins>;
+	clock-frequency = <100000>;
+	i2c-sda-hold-time-ns = <300>;
+	i2c-sda-falling-time-ns = <510>;
+	i2c-scl-falling-time-ns = <510>;
+	status = "okay";
+
+	ioexp1: gpio at 18 {
+		compatible = "nxp,pca9557";
+		reg = <0x18>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "cam0_dvdd12",
+				  "cam0_avdd28",
+				  "cam0_dovdd18";
+	};
+};
+
+&i2c1 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c1_pins>;
+	clock-frequency = <100000>;
+	i2c-sda-hold-time-ns = <300>;
+	i2c-sda-falling-time-ns = <510>;
+	i2c-scl-falling-time-ns = <510>;
+	status = "okay";
+
+	ioexp2: gpio at 18 {
+		compatible = "nxp,pca9557";
+		reg = <0x18>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "",
+				  "cam0_reset",
+				  "cam1_reset",
+				  "cam2_reset",
+				  "wl_host_wake",
+				  "bt_resetn",
+				  "",
+				  "bt_host_wake";
+	};
+};
+
+&i2c3 {
+	pinctrl-names = "default";
+	pinctrl-0 = <&i2c3_pins>;
+	clock-frequency = <100000>;
+	i2c-sda-hold-time-ns = <300>;
+	i2c-sda-falling-time-ns = <510>;
+	i2c-scl-falling-time-ns = <510>;
+	status = "okay";
+
+	ioexp3: gpio at 18 {
+		compatible = "nxp,pca9557";
+		reg = <0x18>;
+		gpio-controller;
+		#gpio-cells = <2>;
+		gpio-line-names = "tp0_rst",
+				  "",
+				  "",
+				  "vcc5v_usb",
+				  "vdd28_tp0",
+				  "vdd33_lcd0",
+				  "vdd18_lcd0",
+				  "lcd0_reset";
+	};
+};
+
 &padctrl0_apsys {
 	fan_pins: fan-0 {
 		pwm1-pins {
@@ -123,6 +196,18 @@ pwm1-pins {
 		};
 	};
 
+	i2c3_pins: i2c3-0 {
+		i2c-pins {
+			pins = "I2C3_SCL", "I2C3_SDA";
+			function = "i2c";
+			bias-disable; /* external pull-up */
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+
 	uart0_pins: uart0-0 {
 		tx-pins {
 			pins = "UART0_TXD";
@@ -146,6 +231,32 @@ rx-pins {
 	};
 };
 
+&padctrl1_apsys {
+	i2c0_pins: i2c0-0 {
+		i2c-pins {
+			pins = "I2C0_SCL", "I2C0_SDA";
+			function = "i2c";
+			bias-disable; /* external pull-up */
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+
+	i2c1_pins: i2c1-0 {
+		i2c-pins {
+			pins = "I2C1_SCL", "I2C1_SDA";
+			function = "i2c";
+			bias-disable; /* external pull-up */
+			drive-strength = <7>;
+			input-enable;
+			input-schmitt-enable;
+			slew-rate = <0>;
+		};
+	};
+};
+
 &uart0 {
 	pinctrl-names = "default";
 	pinctrl-0 = <&uart0_pins>;
-- 
2.52.0