[PATCH 4/7] pinctrl: mediatek: paris: Fix pingroup pin config state readback

[Chen-Yu Tsai <wenst@xxxxxxxxxxxx>]

mtk_pconf_group_get(), used to read back pingroup pin config state,
simply returns a set of configs saved from a previous invocation of
mtk_pconf_group_set(). This is an unfiltered, unvalidated set passed
in from the pinconf core, which does not match the current hardware
state.

Since the driver library is designed to have a pin per group, pass
through mtk_pconf_group_get() to mtk_pinconf_get(), to read back
the current pin config state of the only pin in the group.

Fixes: 805250982bb5 ("pinctrl: mediatek: add pinctrl-paris that implements the vendor dt-bindings")
Signed-off-by: Chen-Yu Tsai <wenst@xxxxxxxxxxxx>
---
 drivers/pinctrl/mediatek/pinctrl-paris.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/pinctrl/mediatek/pinctrl-paris.c b/drivers/pinctrl/mediatek/pinctrl-paris.c
index d720624d8cd2..d259f075c62d 100644
--- a/drivers/pinctrl/mediatek/pinctrl-paris.c
+++ b/drivers/pinctrl/mediatek/pinctrl-paris.c
@@ -736,10 +736,10 @@ static int mtk_pconf_group_get(struct pinctrl_dev *pctldev, unsigned group,
 			       unsigned long *config)
 {
 	struct mtk_pinctrl *hw = pinctrl_dev_get_drvdata(pctldev);
+	struct mtk_pinctrl_group *grp = &hw->groups[group];
 
-	*config = hw->groups[group].config;
-
-	return 0;
+	 /* One pin per group only */
+	return mtk_pinconf_get(pctldev, grp->pin, config);
 }
 
 static int mtk_pconf_group_set(struct pinctrl_dev *pctldev, unsigned group,
-- 
2.34.1.575.g55b058a8bb-goog