Jetson TX2 device tree, i2c nodes and camera driver loading

I am a bit confused with behavior of Jetson TX2 when loading drivers for camera. Here is definition of IMX274 in device tree: i2c@3180000 { reg = ; dmas = ; interrupts = ; compatible = "nvidia,tegra186-i2c"; clock-names = "div-clk", "parent", "slow-clk"; reset-names = "i2c"; clock-frequency = ; scl-gpio = ; sda-gpio = ; clocks = ; resets = ; status = "okay"; #address-cells = ; phandle = ; #stream-id-cells = ; #size-cells = ; dma-names = "rx", "tx"; linux,phandle = ; imx274_a@1a { reg = ; mclk = "extperiph1"; devnode = "video0"; avdd-reg = "vana"; compatible = "nvidia,imx274"; clock-names = "extperiph1", "pllp_grtba"; reset-gpios = ; physical_h = "2.738"; physical_w = "3.674"; clocks = ; vana-supply = ; sensor_model = "imx274"; iovdd-reg = "vif"; delayed_gain = "true"; vif-supply = ; dvdd-reg = "vdig"; vdig-supply = ; mode0 { ... } ports { #address-cells = ; #size-cells = ; port@0 { reg = ; endpoint { bus-width = ; remote-endpoint = ; phandle = ; csi-port = ; linux,phandle = ; }; }; }; }; i2c2 is an alias for i2c@3180000 therefore I expect to see the device on bus 2. An sure I can see it on a bus with address 0x57. nvidia@tegra-ubuntu:~/kernel/kernel$ sudo i2cdetect -r -y 2 [sudo] password for nvidia: 0 1 2 3 4 5 6 7 8 9 a b c d e f 00: -- -- -- -- -- -- -- -- -- -- -- -- -- 10: -- -- -- -- -- -- -- -- -- -- UU -- -- -- -- -- 20: -- -- -- -- UU -- -- -- -- -- -- -- -- -- -- -- 30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 40: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 50: -- -- -- -- -- -- -- 57 -- -- -- -- -- -- -- -- 60: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 70: -- -- -- -- -- -- -- -- Here comes the first question. **How does kernel identifies type of i2c device on a bus?** I thought that field reg is used, but 0x1a in device tree is clearly different from 0x57 on a bus. Secondly, as I can see module is compatible with the following drivers: compatible = "nvidia,imx274"; However device driver is different: nvidia@tegra-ubuntu:~/kernel/kernel$ sudo v4l2-ctl -D -d /dev/video0 Driver Info (not using libv4l2): Driver name : tegra-video Card type : vi-output, imx274 2-001a Bus info : platform:15700000.vi:0 Driver version: 4.4.38 Capabilities : 0x84200001 Video Capture Streaming Extended Pix Format Device Capabilities Device Caps : 0x04200001 Video Capture Streaming Extended Pix Format **Therefore it seems for me that wrong driver is loaded for some reasons, it it true or I am just missing something?** However it is still possible to capture image with argus.