Re: Possible regression 2024.12.0 in parsing "aliases"

[Sascha Hauer <s.hauer@pengutronix.de>]

Hi Alexander,

On Wed, Dec 11, 2024 at 09:14:32AM +0300, Alexander Shiyan wrote:
> Hello.
> 
> After updating barebox to version 2024.12.0, an error message appeared
> when loading
> the RK3568 board. Accordingly, the I2C1 interface does not work.
> In the previous version (2024.10.0), everything worked as it should. I did not
> understand what the problem is, but I suspect that aliases are now
> parsed incorrectly.
> The system has an alias i2c1 (this is the basic SOC i2c1 interface)
> and an alias i2c10 for the GPIO expander. Perhaps the problem is somewhere here?
> 
> ERROR: rk3x-i2c fe5a0000.i2c@fe5a0000.of: probe failed: Device or resource busy

The culprit is likely somewhere in these commits:

79357f8b96 i2c: start dynamic I2C bus numbers at 32
b474672545 i2c: get adapter.nr from device tree
5b167ad520 i2c: set adapter.nr explicitly to -1

We now use of_alias_get_id() to get the i2c adapter nr. Which adapter
number does fe5a0000.i2c@fe5a0000.of get and which i2c bus device has
already occupied that number?

Sascha

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