Re: [PATCH v3 1/4] i2c: mux-pinctrl: Rework to honor disabled child nodes

From: Wolfram Sang
Date: Mon Mar 23 2015 - 14:31:51 EST



> If modifying i2c-mux-pinctrl to respect the sub-bus status property is
> such a big issue, I'd rather leave the driver as is and expose all
> sub-busses to userspace.

Well, dunno what 'big issue' is in your book :) What definately needs to
be done is:

* handle "status" at mux-core level, not mux-driver
* that probably needs us to convert i2c_add_mux_adapter() to return
ERR_PTRs instead of NULL, so we can distinguish the "disabled" case
* that would mean to fix all existing users

That's all not groundbreaking stuff, but needs caution and thoroughness.
There might be some gory details left, though...

Regards,

Wolfram
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