[PATCH v3 5/9] arm64: dts: ti: k3-j721e-sk: Model CSI2RX connector mux

[Vaishnav Achath]

J721E SK has the CSI2RX routed to a MIPI CSI connector and to 15-pin
RPi camera connector through an analog mux with GPIO control, model that
so that an overlay can control the mux state according to connected
cameras. Also provide labels to the I2C mux bus instances so that a
generic overlay can be used across multiple platforms.

J721E SK schematics: https://www.ti.com/lit/zip/sprr438

Reviewed-by: Jai Luthra <j-luthra at ti.com>
Signed-off-by: Vaishnav Achath <vaishnav.a at ti.com>
---

V1->V2: Update commit message with schematics.

 arch/arm64/boot/dts/ti/k3-j721e-sk.dts | 19 +++++++++++++++++--
 1 file changed, 17 insertions(+), 2 deletions(-)

diff --git a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
index 6950b1ff124f..5dbc85bc5038 100644
--- a/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-j721e-sk.dts
@@ -286,6 +286,15 @@ tfp410_out: endpoint {
 			};
 		};
 	};
+
+	csi_mux: mux-controller {
+		compatible = "gpio-mux";
+		#mux-state-cells = <1>;
+		mux-gpios = <&main_gpio0 88 GPIO_ACTIVE_HIGH>;
+		idle-state = <0>;
+		pinctrl-names = "default";
+		pinctrl-0 = <&main_csi_mux_sel_pins_default>;
+	};
 };
 
 &main_pmx0 {
@@ -352,6 +361,12 @@ J721E_IOPAD(0x214, PIN_OUTPUT, 4) /* (V4) MCAN1_TX.USB1_DRVVBUS */
 		>;
 	};
 
+	main_csi_mux_sel_pins_default: main-csi-mux-sel-default-pins {
+		pinctrl-single,pins = <
+			J721E_IOPAD(0x164, PIN_OUTPUT, 7) /* (V29) RGMII5_TD2 */
+		>;
+	};
+
 	dp0_pins_default: dp0-default-pins {
 		pinctrl-single,pins = <
 			J721E_IOPAD(0x1c4, PIN_INPUT, 5) /* SPI0_CS1.DP0_HPD */
@@ -858,14 +873,14 @@ i2c-mux at 70 {
 		reg = <0x70>;
 
 		/* CSI0 I2C */
-		i2c at 0 {
+		cam0_i2c: i2c at 0 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <0>;
 		};
 
 		/* CSI1 I2C */
-		i2c at 1 {
+		cam1_i2c: i2c at 1 {
 			#address-cells = <1>;
 			#size-cells = <0>;
 			reg = <1>;
-- 
2.34.1