linux-kernel - [PATCH 08/12] gpio: ljca: use new line value setter callbacks

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Message-Id: <20250423-gpiochip-set-rv-gpio-part2-v1-8-b22245cde81a@linaro.org>
Date: Wed, 23 Apr 2025 09:15:10 +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 08/12] gpio: ljca: 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-ljca.c | 13 +++++++++----
 1 file changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-ljca.c b/drivers/gpio/gpio-ljca.c
index 817ecb12d550..61524a9ba765 100644
--- a/drivers/gpio/gpio-ljca.c
+++ b/drivers/gpio/gpio-ljca.c
@@ -144,8 +144,8 @@ static int ljca_gpio_get_value(struct gpio_chip *chip, unsigned int offset)
 	return ljca_gpio_read(ljca_gpio, offset);
 }
 
-static void ljca_gpio_set_value(struct gpio_chip *chip, unsigned int offset,
-				int val)
+static int ljca_gpio_set_value(struct gpio_chip *chip, unsigned int offset,
+			       int val)
 {
 	struct ljca_gpio_dev *ljca_gpio = gpiochip_get_data(chip);
 	int ret;
@@ -155,6 +155,8 @@ static void ljca_gpio_set_value(struct gpio_chip *chip, unsigned int offset,
 		dev_err(chip->parent,
 			"set value failed offset: %u val: %d ret: %d\n",
 			offset, val, ret);
+
+	return ret;
 }
 
 static int ljca_gpio_direction_input(struct gpio_chip *chip, unsigned int offset)
@@ -183,7 +185,10 @@ static int ljca_gpio_direction_output(struct gpio_chip *chip,
 	if (ret)
 		return ret;
 
-	ljca_gpio_set_value(chip, offset, val);
+	ret = ljca_gpio_set_value(chip, offset, val);
+	if (ret)
+		return ret;
+
 	set_bit(offset, ljca_gpio->output_enabled);
 
 	return 0;
@@ -432,7 +437,7 @@ static int ljca_gpio_probe(struct auxiliary_device *auxdev,
 	ljca_gpio->gc.direction_output = ljca_gpio_direction_output;
 	ljca_gpio->gc.get_direction = ljca_gpio_get_direction;
 	ljca_gpio->gc.get = ljca_gpio_get_value;
-	ljca_gpio->gc.set = ljca_gpio_set_value;
+	ljca_gpio->gc.set_rv = ljca_gpio_set_value;
 	ljca_gpio->gc.set_config = ljca_gpio_set_config;
 	ljca_gpio->gc.init_valid_mask = ljca_gpio_init_valid_mask;
 	ljca_gpio->gc.can_sleep = true;

-- 
2.45.2