linux-kernel - [PATCH 02/12] gpio: pcf857x: use new GPIO line value setter callbacks

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Message-Id: <20250617-gpiochip-set-rv-gpio-v1-2-903703881fa2@linaro.org>
Date: Tue, 17 Jun 2025 14:24:24 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Andy Shevchenko <andy@...nel.org>, 
 Orson Zhai <orsonzhai@...il.com>, 
 Baolin Wang <baolin.wang@...ux.alibaba.com>, 
 Chunyan Zhang <zhang.lyra@...il.com>, 
 Robert Jarzmik <robert.jarzmik@...e.fr>, Heiko Stuebner <heiko@...ech.de>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, linux-rockchip@...ts.infradead.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 02/12] gpio: pcf857x: 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>
---
 drivers/gpio/gpio-pcf857x.c | 17 ++++++++++-------
 1 file changed, 10 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpio-pcf857x.c b/drivers/gpio/gpio-pcf857x.c
index 2e5f5d7f886598318b753304e7e0efca54ff8b69..a042036803336439d8e164fcfbd0263b0e84f3a4 100644
--- a/drivers/gpio/gpio-pcf857x.c
+++ b/drivers/gpio/gpio-pcf857x.c
@@ -171,21 +171,24 @@ static int pcf857x_output(struct gpio_chip *chip, unsigned int offset, int value
 	return status;
 }
 
-static void pcf857x_set(struct gpio_chip *chip, unsigned int offset, int value)
+static int pcf857x_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
-	pcf857x_output(chip, offset, value);
+	return pcf857x_output(chip, offset, value);
 }
 
-static void pcf857x_set_multiple(struct gpio_chip *chip, unsigned long *mask,
-				 unsigned long *bits)
+static int pcf857x_set_multiple(struct gpio_chip *chip, unsigned long *mask,
+				unsigned long *bits)
 {
 	struct pcf857x *gpio = gpiochip_get_data(chip);
+	int status;
 
 	mutex_lock(&gpio->lock);
 	gpio->out &= ~*mask;
 	gpio->out |= *bits & *mask;
-	gpio->write(gpio->client, gpio->out);
+	status = gpio->write(gpio->client, gpio->out);
 	mutex_unlock(&gpio->lock);
+
+	return status;
 }
 
 /*-------------------------------------------------------------------------*/
@@ -292,8 +295,8 @@ static int pcf857x_probe(struct i2c_client *client)
 	gpio->chip.owner		= THIS_MODULE;
 	gpio->chip.get			= pcf857x_get;
 	gpio->chip.get_multiple		= pcf857x_get_multiple;
-	gpio->chip.set			= pcf857x_set;
-	gpio->chip.set_multiple		= pcf857x_set_multiple;
+	gpio->chip.set_rv		= pcf857x_set;
+	gpio->chip.set_multiple_rv	= pcf857x_set_multiple;
 	gpio->chip.direction_input	= pcf857x_input;
 	gpio->chip.direction_output	= pcf857x_output;
 	gpio->chip.ngpio		= (uintptr_t)i2c_get_match_data(client);

-- 
2.48.1