linux-kernel - [PATCH v1] pinctrl: baytrail: fix debounce disable case

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Message-Id: <20230912154815.28975-1-raag.jadav@intel.com>
Date:   Tue, 12 Sep 2023 21:18:15 +0530
From:   Raag Jadav <raag.jadav@...el.com>
To:     linus.walleij@...aro.org, mika.westerberg@...ux.intel.com,
        andriy.shevchenko@...ux.intel.com, dan.carpenter@...aro.org
Cc:     linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org,
        mallikarjunappa.sangannavar@...el.com, pandith.n@...el.com,
        Raag Jadav <raag.jadav@...el.com>
Subject: [PATCH v1] pinctrl: baytrail: fix debounce disable case

We don't need to update debounce pulse value in case debounce is to be
disabled. Break such a case where arg value is zero.

Fixes: 4cfff5b7af8b ("pinctrl: baytrail: consolidate common mask operation")
Reported-by: Dan Carpenter <dan.carpenter@...aro.org>
Closes: https://lore.kernel.org/linux-gpio/d164d471-5432-4c3c-afdb-33dc8f53d043@moroto.mountain/
Signed-off-by: Raag Jadav <raag.jadav@...el.com>
---
 drivers/pinctrl/intel/pinctrl-baytrail.c | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/drivers/pinctrl/intel/pinctrl-baytrail.c b/drivers/pinctrl/intel/pinctrl-baytrail.c
index 6b45b165604c..c522fd2283f9 100644
--- a/drivers/pinctrl/intel/pinctrl-baytrail.c
+++ b/drivers/pinctrl/intel/pinctrl-baytrail.c
@@ -983,11 +983,18 @@ static int byt_pin_config_set(struct pinctrl_dev *pctl_dev,
 
 			break;
 		case PIN_CONFIG_INPUT_DEBOUNCE:
-			if (arg)
+			if (arg) {
 				conf |= BYT_DEBOUNCE_EN;
-			else
+			} else {
 				conf &= ~BYT_DEBOUNCE_EN;
 
+				/*
+				 * No need to update the pulse value.
+				 * Debounce is going to be disabled.
+				 */
+				break;
+			}
+
 			switch (arg) {
 			case 375:
 				db_pulse = BYT_DEBOUNCE_PULSE_375US;
-- 
2.17.1