Re: [PATCH v3 3/4] pinctrl: cygnus: add initial IOMUX driver support

Dmitry Torokhov
2015-02-03T20:00:22Z

On Tue, Feb 03, 2015 at 11:29:36AM -0800, Ray Jui wrote:
> On 2/3/2015 9:40 AM, Dmitry Torokhov wrote:
> > On Mon, Feb 02, 2015 at 06:01:33PM -0800, Ray Jui wrote:
> >> +
> >> +/*
> >> + * List of pins in Cygnus
> >> + */
> >> +static struct cygnus_pin cygnus_pins[] = {
> >
> > const?
> >
> I cannot make it const here, since the address of "gpio_mux" is later
> passed to pinctrl_pin_desc's private data:
>
> pins[i].drv_data = &cygnus_pins[i].gpio_mux;

The pinctrl code says:

"@drv_data: driver-defined per-pin data. pinctrl core does not touch
this"

so we could theoretically cast away the constness and restore it when
we access drv_data in pin control methods, but I won't insist. I am
not sure which way looks nicer.

Thanks.

--
Dmitry