[PATCH v2] pinctrl: renesas: pinctrl-rzg2l: Add validation of GPIO pin in rzg2l_gpio_request()

[Prabhakar]

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@xxxxxxxxxxxxxx>

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@xxxxxxxxxxxxxx>
Reviewed-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
Tested-by: Claudiu Beznea <claudiu.beznea.uj@xxxxxxxxxxxxxx>
---
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