linux-kernel - [PATCH 05/12] gpio: it87: use new line value setter callbacks

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Message-Id: <20250423-gpiochip-set-rv-gpio-part2-v1-5-b22245cde81a@linaro.org>
Date: Wed, 23 Apr 2025 09:15:07 +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 05/12] gpio: it87: 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-it87.c | 11 +++++++----
 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpio/gpio-it87.c b/drivers/gpio/gpio-it87.c
index f332341fd4c8..d8184b527bac 100644
--- a/drivers/gpio/gpio-it87.c
+++ b/drivers/gpio/gpio-it87.c
@@ -213,8 +213,7 @@ static int it87_gpio_direction_in(struct gpio_chip *chip, unsigned gpio_num)
 	return rc;
 }
 
-static void it87_gpio_set(struct gpio_chip *chip,
-			  unsigned gpio_num, int val)
+static int it87_gpio_set(struct gpio_chip *chip, unsigned int gpio_num, int val)
 {
 	u8 mask, curr_vals;
 	u16 reg;
@@ -228,6 +227,8 @@ static void it87_gpio_set(struct gpio_chip *chip,
 		outb(curr_vals | mask, reg);
 	else
 		outb(curr_vals & ~mask, reg);
+
+	return 0;
 }
 
 static int it87_gpio_direction_out(struct gpio_chip *chip,
@@ -249,7 +250,9 @@ static int it87_gpio_direction_out(struct gpio_chip *chip,
 	/* set the output enable bit */
 	superio_set_mask(mask, group + it87_gpio->output_base);
 
-	it87_gpio_set(chip, gpio_num, val);
+	rc = it87_gpio_set(chip, gpio_num, val);
+	if (rc)
+		goto exit;
 
 	superio_exit();
 
@@ -264,7 +267,7 @@ static const struct gpio_chip it87_template_chip = {
 	.request		= it87_gpio_request,
 	.get			= it87_gpio_get,
 	.direction_input	= it87_gpio_direction_in,
-	.set			= it87_gpio_set,
+	.set_rv			= it87_gpio_set,
 	.direction_output	= it87_gpio_direction_out,
 	.base			= -1
 };

-- 
2.45.2