How to spesify output pins of TCA9539 in device tree for controlling external camera power ?

Robotics & Edge Computing Jetson & Embedded Systems Jetson TX1
1

Hello,
I’m currently working on custom board and I am trying to bring up new camera.
My camera’s power enable pins controlled by Jetson TX1 using TCA9539.

But I dont know how to spesify correct values in regulator node for this camera.

I have 2 signal’s which are comes from TCA9539’s P06 and P13.
Currently regulator node’s are :

en_vdd_cam: regulator@5 {
			compatible = "regulator-fixed-sync";
			reg = <5>;
			regulator-name = "en-vdd-cam";
			regulator-min-microvolt = <1800000>;
			regulator-max-microvolt = <1800000>;
			gpio = <&tca9539_77 9 1>;
			enable-active-high;
		};

		en_vdd_cam_1v2: regulator@209 {
			compatible = "regulator-fixed-sync";
			reg = <209>;
			regulator-name = "en-vdd-cam-1v2";
			regulator-min-microvolt = <1200000>;
			regulator-max-microvolt = <1200000>;
			vin-supply = <&vdd_3v3>;
			gpio = <&tca9539_77 3 1>;
			enable-active-high;
		};

What is the correct values of “reg” and “gpio” properties for P06 and P13, and how can I find these values for another pins of TCA9539 ?

Thanks for your answers.

2

The REG is go with regulator# that define in DT.
The IO pin # should map to <&tca9539_77 # 1>;

3

Thanks for your answer. I would like to ask more spesific question for fully understand.

Example regulator node from device tree (tegra210-jetson-cv-power-fixed-p2180-p2597-a00.dtsi) is like following:

en_dvdd_disp_1v8: regulator@205 { // P11
			compatible = "regulator-fixed-sync";
			reg = <205>;
			regulator-name = "en-vdd-disp-1v8";
			regulator-min-microvolt = <1800000>;
			regulator-max-microvolt = <1800000>;
			regulator-boot-on;
			gpio = <&tca9539_74 9 1>;
			enable-active-high;
		};

And from Jetson TX1 developer kit schematics (P2597_B02_Concept_schematics.pdf), P11 represents VDD_LCD_1V8_EN. So gpio = <&tca9539_74 9 1>; must represents PA11 pin of tca9539 right ?
If this is true, what is the relationship between PA11 and gpio = <&tca9539_74 9 1>; ?

Thanks for answers.

4

P0 - P7 map to tca9539_74 0 - 7
P10 - P11 map to tca9539_74 8 - 15