linux-kernel - [PATCH 08/14] gpio: mockup: use value returning setters

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Message-Id: <20250211-gpio-set-retval-v1-8-52d3d613d7d3@linaro.org>
Date: Tue, 11 Feb 2025 13:09:42 +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 08/14] gpio: mockup: 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-mockup.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/gpio/gpio-mockup.c b/drivers/gpio/gpio-mockup.c
index d39c6618bade..266c0953d914 100644
--- a/drivers/gpio/gpio-mockup.c
+++ b/drivers/gpio/gpio-mockup.c
@@ -122,7 +122,7 @@ static void __gpio_mockup_set(struct gpio_mockup_chip *chip,
 	chip->lines[offset].value = !!value;
 }
 
-static void gpio_mockup_set(struct gpio_chip *gc,
+static int gpio_mockup_set(struct gpio_chip *gc,
 			   unsigned int offset, int value)
 {
 	struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
@@ -130,10 +130,12 @@ static void gpio_mockup_set(struct gpio_chip *gc,
 	guard(mutex)(&chip->lock);
 
 	__gpio_mockup_set(chip, offset, value);
+
+	return 0;
 }
 
-static void gpio_mockup_set_multiple(struct gpio_chip *gc,
-				     unsigned long *mask, unsigned long *bits)
+static int gpio_mockup_set_multiple(struct gpio_chip *gc,
+				    unsigned long *mask, unsigned long *bits)
 {
 	struct gpio_mockup_chip *chip = gpiochip_get_data(gc);
 	unsigned int bit;
@@ -142,6 +144,8 @@ static void gpio_mockup_set_multiple(struct gpio_chip *gc,
 
 	for_each_set_bit(bit, mask, gc->ngpio)
 		__gpio_mockup_set(chip, bit, test_bit(bit, bits));
+
+	return 0;
 }
 
 static int gpio_mockup_apply_pull(struct gpio_mockup_chip *chip,
@@ -445,9 +449,9 @@ static int gpio_mockup_probe(struct platform_device *pdev)
 	gc->owner = THIS_MODULE;
 	gc->parent = dev;
 	gc->get = gpio_mockup_get;
-	gc->set = gpio_mockup_set;
+	gc->set_rv = gpio_mockup_set;
 	gc->get_multiple = gpio_mockup_get_multiple;
-	gc->set_multiple = gpio_mockup_set_multiple;
+	gc->set_multiple_rv = gpio_mockup_set_multiple;
 	gc->direction_output = gpio_mockup_dirout;
 	gc->direction_input = gpio_mockup_dirin;
 	gc->get_direction = gpio_mockup_get_direction;

-- 
2.45.2