linux-kernel - [PATCH 09/14] gpio: aggregator: use value returning setters

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Message-Id: <20250211-gpio-set-retval-v1-9-52d3d613d7d3@linaro.org>
Date: Tue, 11 Feb 2025 13:09:43 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, Michael Walle <mwalle@...nel.org>, 
 Bamvor Jian Zhang <bamv2005@...il.com>, 
 Geert Uytterhoeven <geert+renesas@...der.be>, Keerthy <j-keerthy@...com>, 
 Uwe Kleine-König <ukleinek@...nel.org>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-pwm@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 09/14] gpio: aggregator: use value returning setters

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

struct gpio_chip now has additional variants of the set(_multiple)
driver callbacks that return an integer to indicate success or failure.
Convert the driver to using them.

Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
---
 drivers/gpio/gpio-aggregator.c | 38 ++++++++++++++++++++++++--------------
 1 file changed, 24 insertions(+), 14 deletions(-)

diff --git a/drivers/gpio/gpio-aggregator.c b/drivers/gpio/gpio-aggregator.c
index 65f41cc3eafc..e799599a06a1 100644
--- a/drivers/gpio/gpio-aggregator.c
+++ b/drivers/gpio/gpio-aggregator.c
@@ -358,25 +358,30 @@ static void gpio_fwd_delay(struct gpio_chip *chip, unsigned int offset, int valu
 		udelay(delay_us);
 }
 
-static void gpio_fwd_set(struct gpio_chip *chip, unsigned int offset, int value)
+static int gpio_fwd_set(struct gpio_chip *chip, unsigned int offset, int value)
 {
 	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
+	int ret;
 
 	if (chip->can_sleep)
-		gpiod_set_value_cansleep(fwd->descs[offset], value);
+		ret = gpiod_set_value_cansleep(fwd->descs[offset], value);
 	else
-		gpiod_set_value(fwd->descs[offset], value);
+		ret = gpiod_set_value(fwd->descs[offset], value);
+	if (ret)
+		return ret;
 
 	if (fwd->delay_timings)
 		gpio_fwd_delay(chip, offset, value);
+
+	return ret;
 }
 
-static void gpio_fwd_set_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,
-				  unsigned long *bits)
+static int gpio_fwd_set_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,
+				 unsigned long *bits)
 {
 	struct gpio_desc **descs = fwd_tmp_descs(fwd);
 	unsigned long *values = fwd_tmp_values(fwd);
-	unsigned int i, j = 0;
+	unsigned int i, j = 0, ret;
 
 	for_each_set_bit(i, mask, fwd->chip.ngpio) {
 		__assign_bit(j, values, test_bit(i, bits));
@@ -384,26 +389,31 @@ static void gpio_fwd_set_multiple(struct gpiochip_fwd *fwd, unsigned long *mask,
 	}
 
 	if (fwd->chip.can_sleep)
-		gpiod_set_array_value_cansleep(j, descs, NULL, values);
+		ret = gpiod_set_array_value_cansleep(j, descs, NULL, values);
 	else
-		gpiod_set_array_value(j, descs, NULL, values);
+		ret = gpiod_set_array_value(j, descs, NULL, values);
+
+	return ret;
 }
 
-static void gpio_fwd_set_multiple_locked(struct gpio_chip *chip,
-					 unsigned long *mask, unsigned long *bits)
+static int gpio_fwd_set_multiple_locked(struct gpio_chip *chip,
+					unsigned long *mask, unsigned long *bits)
 {
 	struct gpiochip_fwd *fwd = gpiochip_get_data(chip);
 	unsigned long flags;
+	int ret;
 
 	if (chip->can_sleep) {
 		mutex_lock(&fwd->mlock);
-		gpio_fwd_set_multiple(fwd, mask, bits);
+		ret = gpio_fwd_set_multiple(fwd, mask, bits);
 		mutex_unlock(&fwd->mlock);
 	} else {
 		spin_lock_irqsave(&fwd->slock, flags);
-		gpio_fwd_set_multiple(fwd, mask, bits);
+		ret = gpio_fwd_set_multiple(fwd, mask, bits);
 		spin_unlock_irqrestore(&fwd->slock, flags);
 	}
+
+	return ret;
 }
 
 static int gpio_fwd_set_config(struct gpio_chip *chip, unsigned int offset,
@@ -533,8 +543,8 @@ static struct gpiochip_fwd *gpiochip_fwd_create(struct device *dev,
 	chip->direction_output = gpio_fwd_direction_output;
 	chip->get = gpio_fwd_get;
 	chip->get_multiple = gpio_fwd_get_multiple_locked;
-	chip->set = gpio_fwd_set;
-	chip->set_multiple = gpio_fwd_set_multiple_locked;
+	chip->set_rv = gpio_fwd_set;
+	chip->set_multiple_rv = gpio_fwd_set_multiple_locked;
 	chip->to_irq = gpio_fwd_to_irq;
 	chip->base = -1;
 	chip->ngpio = ngpios;

-- 
2.45.2