[v2, 04/12] pinctrl: mediatek: moore: check if pin_desc is valid before use

[sean.wang at mediatek.com]

From: Sean Wang <sean.wang at mediatek.com>

>Certain SoC are missing the middle part gpios in consecutive pins, it's better to check if mtk_pin_desc is a valid pin for the extensibility
>
>Signed-off-by: Sam Shih <sam.shih at mediatek.com>
>


>---
>v2: applied the comment suggested by reviewers:
>    - for the pins not ballout, we can fill .name in struct mtk_pin_desc
>      as NULL and return -ENOTSUPP in gpio/pinconf ops.

Thanks for take the suggestion and the improvement.
Acked-by: Sean Wang <sean.wang at mediatek.com>

>
>---
> drivers/pinctrl/mediatek/pinctrl-moore.c | 18 ++++++++++++++++++
> 1 file changed, 18 insertions(+)
>
>diff --git a/drivers/pinctrl/mediatek/pinctrl-moore.c b/drivers/pinctrl/mediatek/pinctrl-moore.c
>index 3a4a23c40a71..ad3b67163973 100644
>--- a/drivers/pinctrl/mediatek/pinctrl-moore.c
>+++ b/drivers/pinctrl/mediatek/pinctrl-moore.c
>@@ -60,6 +60,8 @@ static int mtk_pinmux_set_mux(struct pinctrl_dev *pctldev,
>		int pin = grp->pins[i];
>
>		desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
>+		if (!desc->name)
>+			return -ENOTSUPP;
>
>		mtk_hw_set_value(hw, desc, PINCTRL_PIN_REG_MODE,
>				 pin_modes[i]);
>@@ -76,6 +78,8 @@ static int mtk_pinmux_gpio_request_enable(struct pinctrl_dev *pctldev,
>	const struct mtk_pin_desc *desc;
>
>	desc = (const struct mtk_pin_desc *)&hw->soc->pins[pin];
>+	if (!desc->name)
>+		return -ENOTSUPP;

<snip>