Re: [PATCH] pinctrl: Use of_property_present() for testing DT property presence

[Geert Uytterhoeven <geert@xxxxxxxxxxxxxx>]

On Mon, Mar 13, 2023 at 10:00 AM Geert Uytterhoeven
<geert@xxxxxxxxxxxxxx> wrote:
> On Fri, Mar 10, 2023 at 3:56 PM Rob Herring <robh@xxxxxxxxxx> wrote:
> > It is preferred to use typed property access functions (i.e.
> > of_property_read_<type> functions) rather than low-level
> > of_get_property/of_find_property functions for reading properties. As
> > part of this, convert of_get_property/of_find_property calls to the
> > recently added of_property_present() helper when we just want to test
> > for presence of a property and nothing more.
> >
> > Signed-off-by: Rob Herring <robh@xxxxxxxxxx>
>
> Thanks for your patch!
>
> > --- a/drivers/pinctrl/renesas/pinctrl.c
> > +++ b/drivers/pinctrl/renesas/pinctrl.c
> > @@ -125,8 +125,8 @@ static int sh_pfc_dt_subnode_to_map(struct pinctrl_dev *pctldev,
> >          * inside a subnode nor across subnodes.
> >          */
> >         if (!pmx->func_prop_name) {
> > -               if (of_find_property(np, "groups", NULL) ||
> > -                   of_find_property(np, "pins", NULL)) {
> > +               if (of_property_present(np, "groups")||
> > +                   of_property_present(np, "pins")) {
> >                         pmx->func_prop_name = "function";
> >                         pmx->groups_prop_name = "groups";
> >                         pmx->pins_prop_name = "pins";
>
> Reviewed-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
>
> This check is used to auto-detect if the standard property names
> should be used, or the "renesas,"-prefixed ones.
> As the last users of the latter were removed from DTS in v4.10,
> perhaps I should just remove these checks instead?

Sent a patch just doing that, so you can drop this chunk.
https://lore.kernel.org/linux-renesas-soc/ff9c14781110bbf19b56b45dd1f01e6da90319ad.1678704441.git.geert+renesas@xxxxxxxxx

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds