ov13850 address

Chip Platform Rockchip
1

I refer to here
https://drive.google.com/drive/folders/0B7HO8lbGgAqAfmZ2SjBTZVlQbDVJV1hNQ29wOHFRWVdieDZSWU15aXNTOHIxSDRGOFV4RDA

and here
https://github.com/rockchip-linux/kernel/blob/release-4.4/arch/arm64/boot/dts/rockchip/rk3399-firefly-linux.dts

...
camera0: ov13850@10 {
		status = "okay";
		compatible = "omnivision,ov13850-v4l2-i2c-subdev";
		reg = < 0x10 >;
		device_type = "v4l2-i2c-subdev";
...

According to the reference,
0x20 or 0x6C is used, and the camera address in dts is defined as 0x10.

how can it be work?

2

In my experience, if the SCCB_ID is 0x20, the i2c address is SCCB_ID / 2 = 0x10.

3

penguin Posted at 12/29/2018 08:54
In my experience, if the SCCB_ID is 0x20, the i2c address is SCCB_ID / 2 = 0x10.

Happy new year and thanks for your reply

Every time I analyze this product, I feel like fall into the maze.
why address divided by 2?

4

SCCB is different from i2c. I do not dwell deep into it.

In case you need, here’s the spec I find:

http://www4.cs.umanitoba.ca/~jacky/Teaching/Courses/74.795-LocalVision/ReadingList/ov-sccb.pdf

The divided by 2 is from experience. Hope you find the answer in the doc.

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