[PATCH 5.10.y-cip 16/26] pinctrl: renesas: rzg2l: Return -EINVAL for pins which have input disabled

Biju Das

From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...>

commit 5223c511eb4f919e6b423b2f66e02674e97e77e3 upstream.

Pin status reported by pinconf-pins file always reported pin status as
"input enabled" even for pins which had input disabled. Fix this by
returning -EINVAL for the pins which have input disabled.

Fixes: c4c4637eb57f2 ("pinctrl: renesas: Add RZ/G2L pin and gpio controller driver")
Reported-by: Phil Edworthy <phil.edworthy@...>
Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...>
Reviewed-by: Phil Edworthy <phil.edworthy@...>
Link: https://lore.kernel.org/r/20220511094057.3151-1-prabhakar.mahadev-lad.rj@bp.renesas.com
Signed-off-by: Geert Uytterhoeven <geert+renesas@...>
Signed-off-by: Biju Das <biju.das.jz@...>
drivers/pinctrl/renesas/pinctrl-rzg2l.c | 2 ++
1 file changed, 2 insertions(+)

diff --git a/drivers/pinctrl/renesas/pinctrl-rzg2l.c b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
index a48cac55152c..c3cdf52b7294 100644
--- a/drivers/pinctrl/renesas/pinctrl-rzg2l.c
+++ b/drivers/pinctrl/renesas/pinctrl-rzg2l.c
@@ -517,6 +517,8 @@ static int rzg2l_pinctrl_pinconf_get(struct pinctrl_dev *pctldev,
if (!(cfg & PIN_CFG_IEN))
return -EINVAL;
arg = rzg2l_read_pin_config(pctrl, IEN(port_offset), bit, IEN_MASK);
+ if (!arg)
+ return -EINVAL;