Re: [PATCH v2] gpiolib: Show correct direction from the beginning

[Timur Tabi]

On 10/2/18 2:38 AM, Linus Walleij wrote:
> > But as today the only driver that seems to be using valid_mask is msm,
> > so perhaps a hack is something better and then when we have a second
> > driver that requires it we figure out the real requirements. But it is
> > definately your decision;)

Please note that MSM is supposed to be the *first* driver, not the only, 
driver that needs valid_mask.  So let's not make any code changes that 
limit this feature to the MSM driver.

> I would just add some exported function to gpiolib to do what you
> need so you can set up the valid_mask before calling
> gpiochip_add*.

I think that should be okay.  Drivers should know pretty early whether 
they need valid_mask or not.