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

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>

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index d4fde741e3543fc0348afe1c936ef81e4b9f749e..c8e74945401d2de07199857becc8e3ddd90b5c63 100644 (file)
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -581,6 +581,9 @@ 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)