arm64: dts: ti: k3-j721s2-common-proc-board: Add main_i2c4 instance

Add dt node for main_i2c4 instance along with required pinmuxing.
Also add the gpio expander 'exp4' required by display connector.

Signed-off-by: Jayesh Choudhary <j-choudhary@ti.com>
Tested-by: Harikrishna Shenoy <h-shenoy@ti.com>
Reviewed-by: Harikrishna Shenoy <h-shenoy@ti.com>
Reviewed-by: Udit Kumar <u-kumar1@ti.com>
Link: https://lore.kernel.org/r/20250716060114.52122-5-j-choudhary@ti.com
Signed-off-by: Nishanth Menon <nm@ti.com>

diff --git a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
index e2fc1288ed07664591c2d645dc949f182dd71df7..793d50344fade0deb5ef5ece9ec0f7eda876b731 100644 (file)
--- a/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721s2-common-proc-board.dts
@@ -148,6 +148,13 @@
                >;
        };
 
+       main_i2c4_pins_default: main-i2c4-default-pins {
+               pinctrl-single,pins = <
+                       J721S2_IOPAD(0x014, PIN_INPUT_PULLUP, 8) /* (AD25) I2C4_SCL */
+                       J721S2_IOPAD(0x010, PIN_INPUT_PULLUP, 8) /* (AF28) I2C4_SDA */
+               >;
+       };
+
        main_i2c5_pins_default: main-i2c5-default-pins {
                pinctrl-single,pins = <
                        J721S2_IOPAD(0x01c, PIN_INPUT, 8) /* (Y24) MCAN15_TX.I2C5_SCL */
@@ -370,6 +377,23 @@
        };
 };
 
+&main_i2c4 {
+       status = "okay";
+       pinctrl-names = "default";
+       pinctrl-0 = <&main_i2c4_pins_default>;
+       clock-frequency = <400000>;
+
+       exp4: gpio@20 {
+               compatible = "ti,tca6408";
+               reg = <0x20>;
+               gpio-controller;
+               #gpio-cells = <2>;
+               gpio-line-names = "DP0_PWR_SW_EN", "DP1_PWR_SW_EN", "UB981_PDB",
+                                 "UB981_GPIO0", "UB981_GPIO1", "UB981_GPIO2",
+                                 "UB981_GPIO3", "PWR_SW_CNTL_DSI0#";
+       };
+};
+
 &main_i2c5 {
        pinctrl-names = "default";
        pinctrl-0 = <&main_i2c5_pins_default>;