pinctrl: mediatek: paris: Skip custom extra pin config dump for virtual GPIOs

[ Upstream commit 1763933d377ecb05454f8d20e3c8922480db2ac0 ]

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@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20220308100956.2750295-7-wenst@chromium.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index 2f3c65265e230d516af0a18a976635cb59fa34ec..d0a4ebbe1e7e65f6e04532bc02f8101afbb3fbd1 100644 (file)
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -580,6 +580,9 @@ 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)