[PATCH 6/7] pinctrl: mediatek: paris: Skip custom extra pin config dump for vrtual GPIOs

[Chen-Yu Tsai]

Virtual GPIOs do not have any hardware state associated with them. Any
attempt to read back hardware state for these pins result in error
codes.

Skip dumping extra pin config information for these virtual GPIOs.

Fixes: 184d8e13f9b1 ("pinctrl: mediatek: Add support for pin configuration dump via debugfs.")
Signed-off-by: Chen-Yu Tsai <wenst at chromium.org>
---
 drivers/pinctrl/mediatek/pinctrl-paris.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 1bacabfbc183..678c8aa33012 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -585,6 +585,9 @@ ssize_t mtk_pctrl_show_one_pin(struct mtk_pinctrl *hw,
 	if (gpio >= hw->soc->npins)
 		return -EINVAL;
 
+	if (mtk_is_virt_gpio(hw, gpio))
+		return -EINVAL;
+
 	desc = (const struct mtk_pin_desc *)&hw->soc->pins[gpio];
 	pinmux = mtk_pctrl_get_pinmux(hw, gpio);
 	if (pinmux >= hw->soc->nfuncs)
-- 
2.34.1.575.g55b058a8bb-goog