Re: [PATCH 02/12] pinctrl: Add core pinctrl support for Aspeed SoCs

[Linus Walleij]

On Fri, Aug 12, 2016 at 2:33 AM, Andrew Jeffery <andrew@xxxxxxxx> wrote:

>> > +
>> > +       while (*exprs) {
>> > +               if (strncmp((*exprs)->signal, "GPIO", 4) == 0)
>> > +                       return true;
>> This looks a bit fragile and hard to debug. Do you have some better
>> idea of how to do this but not resort to string comparison?
>
> Yes, this is a little unfortunate. GPIO is not always a pin's lowest
> priority function (e.g. the RGMII/RMII pins), so this makes the GPIO
> case like any other mux function: We need to know when to stop
> iterating the arrays when disabling mux functions of higher priority.
> The alternative is probably to introduce another field to struct
> aspeed_sig_expr and set that as necessary, but that feels redundant if
> we keep to a consistent naming for the GPIOs.

I would probably prefer that option (introduce another field)
but you should make the overall decision, it's no strong opinion
from my side.

> Would it be acceptable to document that requirement?

Sure.

Yours,
Linus Walleij