Hi Prabhakar,
On Tue, Nov 9, 2021 at 3:31 PM Lad, Prabhakar
<prabhakar.csengg@xxxxxxxxx> wrote:
> On Mon, Nov 8, 2021 at 3:36 PM Geert Uytterhoeven <geert@xxxxxxxxxxxxxx> wrote:
> > On Fri, Oct 29, 2021 at 2:44 PM Lad Prabhakar
> > <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx> wrote:
> > > Add support to get/set pin config for GPIO port pins.
> > >
> > > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>
> > > Reviewed-by: Biju Das <biju.das.jz@xxxxxxxxxxxxxx>
> >
> > Thanks for your patch!
> >
> > > --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> > > +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> >
> > > @@ -495,6 +512,14 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
> > > port = RZG2L_SINGLE_PIN_GET_PORT(*pin_data);
> > > cfg = RZG2L_SINGLE_PIN_GET_CFGS(*pin_data);
> > > bit = RZG2L_SINGLE_PIN_GET_BIT(*pin_data);
> > > + } else {
> > > + cfg = RZG2L_GPIO_PORT_GET_CFGS(*pin_data);
> > > + port = RZG2L_PIN_ID_TO_PORT(_pin);
> > > + bit = RZG2L_PIN_ID_TO_PIN(_pin);
> > > + port_pin = true;
> >
> > Instead of setting this flag, perhaps port should be adjusted?
>
> Something like below?
>
> #define RZG2L_PORT_START_OFFSET 0x10
>
> port = RZG2L_PIN_ID_TO_PORT_pin) + RZG2L_PORT_START_OFFSET;
> rzg2l_validate_gpio_pin(pctrl, *pin_data, port - RZG2L_PORT_START_OFFSET, bit)
Or adjust port after the call to rzg2l_validate_gpio_pin(), to avoid adding
the offset first, and subtracting it again for calling the latter?
> and rename port -> port_offset in rzg2l_pinctrl_pinconf_get/set
That makes sense. Currently "port" has two meanings: it can mean
either the GPIO port index, or the global register index covering both
single function pin groups and GPIO port indices.
RZG2L_SINGLE_PIN_GET_PORT() returns the latter.
RZG2L_PIN_ID_TO_PORT() returns the former, thus needing an extra offset
to convert to the global register index.
> Or
> would you prefer to change the RZG2L_PIN_ID_TO_PORT macro and adjust
> the entire file?
Changing RZG2L_PIN_ID_TO_PORT() would imply changing all macros
accessing GPIO registers, and is thus quite intrusive.
> > Then rzg2l_r{ead,mw}_pin_config() don't have to care about that
> > anymore.
> >
> Agreed.
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
