Re: i2c issues in 6.18 on R4, but not r4pro (both mt7988 with i2c-mux on i2c2)

Wolfram Sang
2025-11-02T12:45:12Z

>
> I'm sure that i had tested with them already reverted, but maybe powercycle
> was not complete.
> Git bisect pointed also to "i2c: muxes: pca954x: Use reset controller only".

Can you try enabling CONFIG_RESET_GPIO please? It is probably that this
driver is missing. The core relies on that driver for the fallback the
above patch makes use of. Sadly, I couldn't convince the reset
maintainers of a way to automatically select the driver for existing
users :(