Re: [PATCH v3 0/6] RTL8231 GPIO expander support

[Michael Walle]

Am 2021-06-01 11:59, schrieb Linus Walleij:
> Just regarding all registers/memory cells in a register page
> as default volatile (which is what we do a lot of the time)
> has its upsides: bugs like this doesn't happen.

I don't think this is the bug here. If it is really a write-only 
register
the problem is the read in RMW. Because reading the register will return
the input value instead of the (previously written) output value.

-michael