diff mbox series

[5.16,0700/1017] pinctrl: mediatek: paris: Skip custom extra pin config dump for virtual GPIOs

Message ID 20220405070415.050113867@linuxfoundation.org
State Superseded
Headers show
Series None | expand

Commit Message

Greg Kroah-Hartman April 5, 2022, 7:26 a.m. UTC 
From: Chen-Yu Tsai <wenst@chromium.org>

[ 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>
---
 drivers/pinctrl/mediatek/pinctrl-paris.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index faf11c9e1db3..154d55a239e8 100644
--- 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)