linux-kernel - [PATCH 01/10] pinctrl: at91-pio4: use new GPIO line value setter callbacks

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Message-Id: <20250408-gpiochip-set-rv-pinctrl-part1-v1-1-c9d521d7c8c7@linaro.org>
Date: Tue, 08 Apr 2025 09:17:38 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Ludovic Desroches <ludovic.desroches@...rochip.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Nicolas Ferre <nicolas.ferre@...rochip.com>, 
 Alexandre Belloni <alexandre.belloni@...tlin.com>, 
 Claudiu Beznea <claudiu.beznea@...on.dev>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Neil Armstrong <neil.armstrong@...aro.org>, 
 Kevin Hilman <khilman@...libre.com>, Jerome Brunet <jbrunet@...libre.com>, 
 Martin Blumenstingl <martin.blumenstingl@...glemail.com>, 
 Xianwei Zhao <xianwei.zhao@...ogic.com>, 
 Patrick Rudolph <patrick.rudolph@...ements.com>
Cc: linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-amlogic@...ts.infradead.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 01/10] pinctrl: at91-pio4: 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/pinctrl/pinctrl-at91-pio4.c | 14 +++++++++-----
 1 file changed, 9 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/pinctrl-at91-pio4.c b/drivers/pinctrl/pinctrl-at91-pio4.c
index 8b01d312305a..5db839fa9b3f 100644
--- a/drivers/pinctrl/pinctrl-at91-pio4.c
+++ b/drivers/pinctrl/pinctrl-at91-pio4.c
@@ -390,7 +390,7 @@ static int atmel_gpio_direction_output(struct gpio_chip *chip,
 	return 0;
 }
 
-static void atmel_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)
+static int atmel_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)
 {
 	struct atmel_pioctrl *atmel_pioctrl = gpiochip_get_data(chip);
 	struct atmel_pin *pin = atmel_pioctrl->pins[offset];
@@ -398,10 +398,12 @@ static void atmel_gpio_set(struct gpio_chip *chip, unsigned int offset, int val)
 	atmel_gpio_write(atmel_pioctrl, pin->bank,
 			 val ? ATMEL_PIO_SODR : ATMEL_PIO_CODR,
 			 BIT(pin->line));
+
+	return 0;
 }
 
-static void atmel_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
-				    unsigned long *bits)
+static int atmel_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
+				   unsigned long *bits)
 {
 	struct atmel_pioctrl *atmel_pioctrl = gpiochip_get_data(chip);
 	unsigned int bank;
@@ -431,6 +433,8 @@ static void atmel_gpio_set_multiple(struct gpio_chip *chip, unsigned long *mask,
 		bits[word] >>= ATMEL_PIO_NPINS_PER_BANK;
 #endif
 	}
+
+	return 0;
 }
 
 static struct gpio_chip atmel_gpio_chip = {
@@ -438,8 +442,8 @@ static struct gpio_chip atmel_gpio_chip = {
 	.get                    = atmel_gpio_get,
 	.get_multiple           = atmel_gpio_get_multiple,
 	.direction_output       = atmel_gpio_direction_output,
-	.set                    = atmel_gpio_set,
-	.set_multiple           = atmel_gpio_set_multiple,
+	.set_rv                 = atmel_gpio_set,
+	.set_multiple_rv        = atmel_gpio_set_multiple,
 	.to_irq                 = atmel_gpio_to_irq,
 	.base                   = 0,
 };

-- 
2.45.2