linux-kernel - [PATCH 11/15] gpio: cros-ec: use new line value setter callbacks

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Message-Id: <20250310-gpiochip-set-conversion-v1-11-03798bb833eb@linaro.org>
Date: Mon, 10 Mar 2025 13:40:25 +0100
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Ray Jui <rjui@...adcom.com>, 
 Broadcom internal kernel review list <bcm-kernel-feedback-list@...adcom.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Florian Fainelli <florian.fainelli@...adcom.com>, 
 Scott Branden <sbranden@...adcom.com>, 
 Matti Vaittinen <mazziesaccount@...il.com>, 
 Marek Vasut <marek.vasut+renesas@...il.com>, Michael Buesch <m@...s.ch>, 
 Thomas Richard <thomas.richard@...tlin.com>, 
 Eugeniy Paltsev <Eugeniy.Paltsev@...opsys.com>, 
 Benson Leung <bleung@...omium.org>, Guenter Roeck <groeck@...omium.org>, 
 Andy Shevchenko <andy@...nel.org>, 
 Support Opensource <support.opensource@...semi.com>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-renesas-soc@...r.kernel.org, chrome-platform@...ts.linux.dev, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 11/15] gpio: cros-ec: use new 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-cros-ec.c | 13 +++++--------
 1 file changed, 5 insertions(+), 8 deletions(-)

diff --git a/drivers/gpio/gpio-cros-ec.c b/drivers/gpio/gpio-cros-ec.c
index 0c09bb54dc0c..53cd5ff6247b 100644
--- a/drivers/gpio/gpio-cros-ec.c
+++ b/drivers/gpio/gpio-cros-ec.c
@@ -24,24 +24,21 @@
 static const char cros_ec_gpio_prefix[] = "EC:";
 
 /* Setting gpios is only supported when the system is unlocked */
-static void cros_ec_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
+static int cros_ec_gpio_set(struct gpio_chip *gc, unsigned int gpio, int val)
 {
 	const char *name = gc->names[gpio] + strlen(cros_ec_gpio_prefix);
 	struct cros_ec_device *cros_ec = gpiochip_get_data(gc);
 	struct ec_params_gpio_set params = {
 		.val = val,
 	};
-	int ret;
 	ssize_t copied;
 
 	copied = strscpy(params.name, name, sizeof(params.name));
 	if (copied < 0)
-		return;
+		return copied;
 
-	ret = cros_ec_cmd(cros_ec, 0, EC_CMD_GPIO_SET, &params,
-			  sizeof(params), NULL, 0);
-	if (ret < 0)
-		dev_err(gc->parent, "error setting gpio%d (%s) on EC: %d\n", gpio, name, ret);
+	return cros_ec_cmd(cros_ec, 0, EC_CMD_GPIO_SET, &params,
+			   sizeof(params), NULL, 0);
 }
 
 static int cros_ec_gpio_get(struct gpio_chip *gc, unsigned int gpio)
@@ -191,7 +188,7 @@ static int cros_ec_gpio_probe(struct platform_device *pdev)
 	gc->can_sleep = true;
 	gc->label = dev_name(dev);
 	gc->base = -1;
-	gc->set = cros_ec_gpio_set;
+	gc->set_rv = cros_ec_gpio_set;
 	gc->get = cros_ec_gpio_get;
 	gc->get_direction = cros_ec_gpio_get_direction;
 

-- 
2.45.2