linux-kernel - [PATCH 3/3] platform/x86: silicom: use new GPIO line value setter callbacks

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Message-Id: <20250408-gpiochip-set-rv-platform-x86-v1-3-6f67e76a722c@linaro.org>
Date: Tue, 08 Apr 2025 09:19:55 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Santosh Kumar Yadav <santoshkumar.yadav@...co.com>, 
 Peter Korsgaard <peter.korsgaard@...co.com>, 
 Hans de Goede <hdegoede@...hat.com>, 
 Ilpo Järvinen <ilpo.jarvinen@...ux.intel.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>
Cc: platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-gpio@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 3/3] platform/x86: silicom: 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/platform/x86/silicom-platform.c | 11 ++++++-----
 1 file changed, 6 insertions(+), 5 deletions(-)

diff --git a/drivers/platform/x86/silicom-platform.c b/drivers/platform/x86/silicom-platform.c
index c0910af16a3a..021f3fed197a 100644
--- a/drivers/platform/x86/silicom-platform.c
+++ b/drivers/platform/x86/silicom-platform.c
@@ -245,18 +245,19 @@ static int silicom_gpio_direction_input(struct gpio_chip *gc,
 	return direction == GPIO_LINE_DIRECTION_IN ? 0 : -EINVAL;
 }
 
-static void silicom_gpio_set(struct gpio_chip *gc,
-			     unsigned int offset,
-			     int value)
+static int silicom_gpio_set(struct gpio_chip *gc, unsigned int offset,
+			    int value)
 {
 	int direction = silicom_gpio_get_direction(gc, offset);
 	u8 *channels = gpiochip_get_data(gc);
 	int channel = channels[offset];
 
 	if (direction == GPIO_LINE_DIRECTION_IN)
-		return;
+		return -EPERM;
 
 	silicom_mec_port_set(channel, !value);
+
+	return 0;
 }
 
 static int silicom_gpio_direction_output(struct gpio_chip *gc,
@@ -469,7 +470,7 @@ static struct gpio_chip silicom_gpio_chip = {
 	.direction_input = silicom_gpio_direction_input,
 	.direction_output = silicom_gpio_direction_output,
 	.get = silicom_gpio_get,
-	.set = silicom_gpio_set,
+	.set_rv = silicom_gpio_set,
 	.base = -1,
 	.ngpio = ARRAY_SIZE(plat_0222_gpio_channels),
 	.names = plat_0222_gpio_names,

-- 
2.45.2