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pinctrl: renesas: rzg2l: Add validation of GPIO pin in rzg2l_gpio_request()

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

Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Link: https://lore.kernel.org/r/20230925154548.27048-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
This commit is contained in:
Lad Prabhakar
2023-09-25 16:45:48 +01:00
committed by Geert Uytterhoeven
parent 84ba513169
commit c944d9dea7
1 changed files with 6 additions and 0 deletions
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6
drivers/pinctrl/renesas/pinctrl-rzg2l.c
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@@ -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_desc = &pctrl->desc.pins[offset];
u32 port = RZG2L_PIN_ID_TO_PORT(offset);
u8 bit = RZG2L_PIN_ID_TO_PIN(offset);
u32 *pin_data = pin_desc->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;