arm64: dts: stratix10: add i2c pins for pinctrl

Add the I2C pins definition to the Stratix10 devkit. This allows for the
I2C driver to use pinctrl on the pins to allow for GPIO recovery.

Signed-off-by: Dinh Nguyen <[email protected]>
---
v2: remove underscores in node names

Author: Dinh Nguyen

arch/arm64/boot/dts/altera/socfpga_stratix10_socdk.dts

@@ -65,6 +65,22 @@
 	};
 };
 
+&pinctrl0 {
+	i2c1_pmx_func: i2c1-pmx-func {
+		pinctrl-single,pins = <
+			0x78   0x4   /* I2C1_SDA (IO6-B) PIN30SEL) */
+			0x7c   0x4   /* I2C1_SCL (IO7-B) PIN31SEL */
+		>;
+	};
+
+	i2c1_pmx_func_gpio: i2c1-pmx-func-gpio {
+		pinctrl-single,pins = <
+			0x78   0x8   /* I2C1_SDA (IO6-B) PIN30SEL) */
+			0x7c   0x8   /* I2C1_SCL (IO7-B) PIN31SEL */
+		>;
+	};
+};
+
 &gpio1 {
 	status = "okay";
 };
@@ -131,6 +147,13 @@
 	i2c-sda-falling-time-ns = <890>;  /* hcnt */
 	i2c-sdl-falling-time-ns = <890>;  /* lcnt */
 
+	pinctrl-names = "default", "gpio";
+	pinctrl-0 = <&i2c1_pmx_func>;
+	pinctrl-1 = <&i2c1_pmx_func_gpio>;
+
+	scl-gpios = <&portb 6 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+	sda-gpios = <&portb 7 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;
+
 	adc@14 {
 		compatible = "lltc,ltc2497";
 		reg = <0x14>;