linux-kernel - [PATCH v1 1/1] gpiolib: Deduplicate gpiod_direction_input

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Message-ID: <20241031092154.2244728-1-andriy.shevchenko@linux.intel.com>
Date: Thu, 31 Oct 2024 11:21:54 +0200
From: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
To: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>,
	linux-gpio@...r.kernel.org,
	linux-kernel@...r.kernel.org
Cc: Linus Walleij <linus.walleij@...aro.org>,
	Bartosz Golaszewski <brgl@...ev.pl>,
	Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: [PATCH v1 1/1] gpiolib: Deduplicate gpiod_direction_input_nonotify() call

Deduplicate gpiod_direction_input_nonotify() call in
gpiod_direction_output_nonotify() when emulating open-drain
or open-source behaviour. It also aligns the error check
approaches in set_output_value and set_output_flag labels.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
---
 drivers/gpio/gpiolib.c | 16 +++++++---------
 1 file changed, 7 insertions(+), 9 deletions(-)

diff --git a/drivers/gpio/gpiolib.c b/drivers/gpio/gpiolib.c
index 5666c462248c..9376dd270344 100644
--- a/drivers/gpio/gpiolib.c
+++ b/drivers/gpio/gpiolib.c
@@ -2877,19 +2877,15 @@ int gpiod_direction_output_nonotify(struct gpio_desc *desc, int value)
 		if (!ret)
 			goto set_output_value;
 		/* Emulate open drain by not actively driving the line high */
-		if (value) {
-			ret = gpiod_direction_input_nonotify(desc);
+		if (value)
 			goto set_output_flag;
-		}
 	} else if (test_bit(FLAG_OPEN_SOURCE, &flags)) {
 		ret = gpio_set_config(desc, PIN_CONFIG_DRIVE_OPEN_SOURCE);
 		if (!ret)
 			goto set_output_value;
 		/* Emulate open source by not actively driving the line low */
-		if (!value) {
-			ret = gpiod_direction_input_nonotify(desc);
+		if (!value)
 			goto set_output_flag;
-		}
 	} else {
 		gpio_set_config(desc, PIN_CONFIG_DRIVE_PUSH_PULL);
 	}
@@ -2901,15 +2897,17 @@ int gpiod_direction_output_nonotify(struct gpio_desc *desc, int value)
 	return gpiod_direction_output_raw_commit(desc, value);
 
 set_output_flag:
+	ret = gpiod_direction_input_nonotify(desc);
+	if (ret)
+		return ret;
 	/*
 	 * When emulating open-source or open-drain functionalities by not
 	 * actively driving the line (setting mode to input) we still need to
 	 * set the IS_OUT flag or otherwise we won't be able to set the line
 	 * value anymore.
 	 */
-	if (ret == 0)
-		set_bit(FLAG_IS_OUT, &desc->flags);
-	return ret;
+	set_bit(FLAG_IS_OUT, &desc->flags);
+	return 0;
 }
 
 /**
-- 
2.43.0.rc1.1336.g36b5255a03ac