From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>

Validate the GPIO pin request in rzg2l_gpio_request() callback using
rzg2l_validate_gpio_pin() function. This stops any accidental usage
of GPIO pins which are not supported by the SoCs.

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
---
v1->v2
* Maintained reverse christmas tree order.
* Included RB/TB tags from Claudiu.
---
 drivers/pinctrl/renesas/pinctrl-rzg2l.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index 37cdfe4b04f9..cc52a154d201 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -795,12 +795,18 @@ static const struct pinconf_ops rzg2l_pinctrl_confops = {
 static int rzg2l_gpio_request(struct gpio_chip *chip, unsigned int offset)
 {
 	struct rzg2l_pinctrl *pctrl = gpiochip_get_data(chip);
+	const struct pinctrl_pin_desc *pin = &pctrl->desc.pins[offset];
 	u32 port = RZG2L_PIN_ID_TO_PORT(offset);
 	u8 bit = RZG2L_PIN_ID_TO_PIN(offset);
+	u64 *pin_data = pin->drv_data;
 	unsigned long flags;
 	u8 reg8;
 	int ret;
 
+	ret = rzg2l_validate_gpio_pin(pctrl, *pin_data, port, bit);
+	if (ret)
+		return ret;
+
 	ret = pinctrl_gpio_request(chip->base + offset);
 	if (ret)
 		return ret;
-- 
2.34.1

Hi Prabhakar,

On Mon, Sep 11, 2023 at 3:17 PM Prabhakar <prabhakar.csengg@gmail.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
>
> Validate the GPIO pin request in rzg2l_gpio_request() callback using
> rzg2l_validate_gpio_pin() function. This stops any accidental usage
> of GPIO pins which are not supported by the SoCs.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> ---
> v1->v2
> * Maintained reverse christmas tree order.
> * Included RB/TB tags from Claudiu.

Thanks for your patch!

> --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> @@ -795,12 +795,18 @@ static const struct pinconf_ops rzg2l_pinctrl_confops = {
>  static int rzg2l_gpio_request(struct gpio_chip *chip, unsigned int offset)
>  {
>         struct rzg2l_pinctrl *pctrl = gpiochip_get_data(chip);
> +       const struct pinctrl_pin_desc *pin = &pctrl->desc.pins[offset];
>         u32 port = RZG2L_PIN_ID_TO_PORT(offset);
>         u8 bit = RZG2L_PIN_ID_TO_PIN(offset);
> +       u64 *pin_data = pin->drv_data;

isn't drv_data a pointer to unsigned int aka u32?

>         unsigned long flags;
>         u8 reg8;
>         int ret;
>
> +       ret = rzg2l_validate_gpio_pin(pctrl, *pin_data, port, bit);
> +       if (ret)
> +               return ret;
> +
>         ret = pinctrl_gpio_request(chip->base + offset);
>         if (ret)
>                 return ret;

The rest LGTM.

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

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

Hi Geert,

Thank you for the review.

On Mon, Sep 18, 2023 at 1:31 PM Geert Uytterhoeven <geert@linux-m68k.org> wrote:
>
> Hi Prabhakar,
>
> On Mon, Sep 11, 2023 at 3:17 PM Prabhakar <prabhakar.csengg@gmail.com> wrote:
> > From: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> >
> > Validate the GPIO pin request in rzg2l_gpio_request() callback using
> > rzg2l_validate_gpio_pin() function. This stops any accidental usage
> > of GPIO pins which are not supported by the SoCs.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> > Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> > Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
> > ---
> > v1->v2
> > * Maintained reverse christmas tree order.
> > * Included RB/TB tags from Claudiu.
>
> Thanks for your patch!
>
> > --- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> > +++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
> > @@ -795,12 +795,18 @@ static const struct pinconf_ops rzg2l_pinctrl_confops = {
> >  static int rzg2l_gpio_request(struct gpio_chip *chip, unsigned int offset)
> >  {
> >         struct rzg2l_pinctrl *pctrl = gpiochip_get_data(chip);
> > +       const struct pinctrl_pin_desc *pin = &pctrl->desc.pins[offset];
> >         u32 port = RZG2L_PIN_ID_TO_PORT(offset);
> >         u8 bit = RZG2L_PIN_ID_TO_PIN(offset);
> > +       u64 *pin_data = pin->drv_data;
>
> isn't drv_data a pointer to unsigned int aka u32?
>
Agreed. I will fix this and send a v3.

Cheers,
Prabhakar

> >         unsigned long flags;
> >         u8 reg8;
> >         int ret;
> >
> > +       ret = rzg2l_validate_gpio_pin(pctrl, *pin_data, port, bit);
> > +       if (ret)
> > +               return ret;
> > +
> >         ret = pinctrl_gpio_request(chip->base + offset);
> >         if (ret)
> >                 return ret;
>
> The rest LGTM.
>
> Gr{oetje,eeting}s,
>
>                         Geert
>
> --
> Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org
>
> 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