linux-kernel - [PATCH] i2c: mux: ltc4306: use new GPIO line value setter callbacks

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Message-Id: <20250407-gpiochip-set-rv-i2c-mux-v1-1-7330a0f4df1a@linaro.org>
Date: Mon, 07 Apr 2025 09:17:14 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Michael Hennerich <michael.hennerich@...log.com>, 
 Peter Rosin <peda@...ntia.se>, Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: linux-i2c@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-gpio@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH] i2c: mux: ltc4306: use new GPIO 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>
---
Peter: I know you've not been very active recently. If you prefer to
just Ack it and let me take it through the GPIO tree, please do.
---
 drivers/i2c/muxes/i2c-mux-ltc4306.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/i2c/muxes/i2c-mux-ltc4306.c b/drivers/i2c/muxes/i2c-mux-ltc4306.c
index 8a87f19bf5d5..c688af270a11 100644
--- a/drivers/i2c/muxes/i2c-mux-ltc4306.c
+++ b/drivers/i2c/muxes/i2c-mux-ltc4306.c
@@ -85,13 +85,13 @@ static int ltc4306_gpio_get(struct gpio_chip *chip, unsigned int offset)
 	return !!(val & BIT(1 - offset));
 }
 
-static void ltc4306_gpio_set(struct gpio_chip *chip, unsigned int offset,
-			     int value)
+static int ltc4306_gpio_set(struct gpio_chip *chip, unsigned int offset,
+			    int value)
 {
 	struct ltc4306 *data = gpiochip_get_data(chip);
 
-	regmap_update_bits(data->regmap, LTC_REG_CONFIG, BIT(5 - offset),
-			   value ? BIT(5 - offset) : 0);
+	return regmap_update_bits(data->regmap, LTC_REG_CONFIG,
+				  BIT(5 - offset), value ? BIT(5 - offset) : 0);
 }
 
 static int ltc4306_gpio_get_direction(struct gpio_chip *chip,
@@ -164,7 +164,7 @@ static int ltc4306_gpio_init(struct ltc4306 *data)
 	data->gpiochip.direction_input = ltc4306_gpio_direction_input;
 	data->gpiochip.direction_output = ltc4306_gpio_direction_output;
 	data->gpiochip.get = ltc4306_gpio_get;
-	data->gpiochip.set = ltc4306_gpio_set;
+	data->gpiochip.set_rv = ltc4306_gpio_set;
 	data->gpiochip.set_config = ltc4306_gpio_set_config;
 	data->gpiochip.owner = THIS_MODULE;
 

---
base-commit: 0af2f6be1b4281385b618cb86ad946eded089ac8
change-id: 20250331-gpiochip-set-rv-i2c-mux-a060817c1c04

Best regards,
-- 
Bartosz Golaszewski <bartosz.golaszewski@...aro.org>