linux-kernel - [PATCH 12/12] gpio: lp3943: use new line value setter callbacks

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Message-Id: <20250423-gpiochip-set-rv-gpio-part2-v1-12-b22245cde81a@linaro.org>
Date: Wed, 23 Apr 2025 09:15:14 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Shawn Guo <shawnguo@...nel.org>, 
 Sascha Hauer <s.hauer@...gutronix.de>, 
 Pengutronix Kernel Team <kernel@...gutronix.de>, 
 Fabio Estevam <festevam@...il.com>, Lixu Zhang <lixu.zhang@...el.com>, 
 Sakari Ailus <sakari.ailus@...ux.intel.com>, 
 Yinbo Zhu <zhuyinbo@...ngson.cn>
Cc: linux-gpio@...r.kernel.org, imx@...ts.linux.dev, 
 linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 12/12] gpio: lp3943: use new line value setter callbacks

From: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>

struct gpio_chip now has callbacks for setting line values that return
an integer, allowing to indicate failures. Convert the driver to using
them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpio-lp3943.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-lp3943.c b/drivers/gpio/gpio-lp3943.c
index 8e58242f5123..52ab3ac4844c 100644
--- a/drivers/gpio/gpio-lp3943.c
+++ b/drivers/gpio/gpio-lp3943.c
@@ -147,7 +147,8 @@ static int lp3943_gpio_get(struct gpio_chip *chip, unsigned int offset)
 		return lp3943_get_gpio_out_status(lp3943_gpio, chip, offset);
 }
 
-static void lp3943_gpio_set(struct gpio_chip *chip, unsigned int offset, int value)
+static int lp3943_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			   int value)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
 	u8 data;
@@ -157,15 +158,19 @@ static void lp3943_gpio_set(struct gpio_chip *chip, unsigned int offset, int val
 	else
 		data = LP3943_GPIO_OUT_LOW;
 
-	lp3943_gpio_set_mode(lp3943_gpio, offset, data);
+	return lp3943_gpio_set_mode(lp3943_gpio, offset, data);
 }
 
 static int lp3943_gpio_direction_output(struct gpio_chip *chip, unsigned int offset,
 					int value)
 {
 	struct lp3943_gpio *lp3943_gpio = gpiochip_get_data(chip);
+	int ret;
+
+	ret = lp3943_gpio_set(chip, offset, value);
+	if (ret)
+		return ret;
 
-	lp3943_gpio_set(chip, offset, value);
 	lp3943_gpio->input_mask &= ~BIT(offset);
 
 	return 0;
@@ -179,7 +184,7 @@ static const struct gpio_chip lp3943_gpio_chip = {
 	.direction_input	= lp3943_gpio_direction_input,
 	.get			= lp3943_gpio_get,
 	.direction_output	= lp3943_gpio_direction_output,
-	.set			= lp3943_gpio_set,
+	.set_rv			= lp3943_gpio_set,
 	.base			= -1,
 	.ngpio			= LP3943_MAX_GPIO,
 	.can_sleep		= 1,

-- 
2.45.2