Device tree structure for multi level i2c switch ( JetPack 6.0 ) ( Orin NX )

Robotics & Edge Computing Jetson & Embedded Systems Jetson Orin NX
,
1

Hi,
There are two i2c switch on my hardware, I’m wondering that if my dts is correct? Since it’s not working now. Could you please check following structure for us?

i2c@3180000 {
status = “okay”;
#address-cells = <1>;
#size-cells = <0>;

tca9545@73 {      
	compatible = "nxp,pca9545";
	reg = <0x73>;
	#address-cells = <1>;
	#size-cells = <0>;
	skip_mux_detect;
         
	i2c@0 {
		reg = <0>;
		i2c-mux,deselect-on-exit;
		#address-cells = <1>;
		#size-cells = <0>;
		status = "okay";
	};
	
	i2c@1 {
		reg = <1>;
		i2c-mux,deselect-on-exit;
		#address-cells = <1>;
		#size-cells = <0>;
		status = "okay";
		tca9543@72 {
			compatible = "nxp,pca9543";
			reg = <0x72>;
			#address-cells = <1>;
			#size-cells = <0>;
			skip_mux_detect;
			i2c@0 {
				reg = <0>;
				i2c-mux,deselect-on-exit;
				#address-cells = <1>;
				#size-cells = <0>;
				status = "okay";

				device_a@43 { };
				device_b@44 { };
			};
			i2c@0 {
				reg = <0>;
				i2c-mux,deselect-on-exit;
				#address-cells = <1>;
				#size-cells = <0>;
				status = "okay";

				device_c@43 { };
				device_d@44 { };
			};
		};
	};
};

};

3

Please make clear for your problem.
Does the driver probe? Checking by “dmesg | grep -i pca954”

4

Hello Shane,
I checked 954x driver, and I think it probe correctly.

[ 1.750232] i2c i2c-2: Added multiplexed i2c bus 9
[ 1.753979] i2c i2c-10: Added multiplexed i2c bus 11
[ 1.755709] i2c i2c-10: Added multiplexed i2c bus 12
[ 1.756867] i2c i2c-10: Added multiplexed i2c bus 13
[ 1.757110] i2c i2c-10: Added multiplexed i2c bus 14
[ 1.757116] pca954x 10-0072: registered 4 multiplexed busses for I2C switch pca9545
[ 1.757277] i2c i2c-2: Added multiplexed i2c bus 10
[ 1.757358] i2c i2c-2: Added multiplexed i2c bus 15
[ 1.758013] i2c i2c-2: Added multiplexed i2c bus 16
[ 1.758016] pca954x 2-0073: registered 4 multiplexed busses for I2C switch pca9545

But I got following error when “camera_common_initialize”.

[ 14.184727] isx031 11-0043: i2c bus regbase unavailable
[ 14.184730] isx031 11-0043: Could not initialize sensor properties.

5

Looks like duplicate i2c0

			i2c@0 {
				reg = <0>;
				i2c-mux,deselect-on-exit;
				#address-cells = <1>;
				#size-cells = <0>;
				status = "okay";

				device_a@43 { };
				device_b@44 { };
			};
			i2c@0 {
				reg = <0>;
				i2c-mux,deselect-on-exit;
				#address-cells = <1>;
				#size-cells = <0>;
				status = "okay";

				device_c@43 { };
				device_d@44 { };
			};
6

Dear Shane,
Actually it’s typo here, my dts is i2c@1. But it’s not working. I solved it by another way :). Thanks.

7

The error tell the incorrect “reg” in device tree in sensor_common.c
You should check the detail in sensor_common.c for the error.