linux-kernel - [PATCH 05/16] pinctrl: wmt: use new GPIO line value setter callbacks

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Message-Id: <20250612-gpiochip-set-rv-pinctrl-remaining-v1-5-556b0a530cd4@linaro.org>
Date: Thu, 12 Jun 2025 15:15:14 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Dvorkin Dmitry <dvorkin@...bo.com>, Wells Lu <wellslutw@...il.com>, 
 Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Patrice Chotard <patrice.chotard@...s.st.com>, 
 Support Opensource <support.opensource@...semi.com>, 
 Baruch Siach <baruch@...s.co.il>, Sven Peter <sven@...nel.org>, 
 Janne Grunau <j@...nau.net>, Alyssa Rosenzweig <alyssa@...enzweig.io>, 
 Neal Gompa <neal@...pa.dev>, Viresh Kumar <vireshk@...nel.org>, 
 Lakshmi Sowjanya D <lakshmi.sowjanya.d@...el.com>, 
 Chen-Yu Tsai <wens@...e.org>, Jernej Skrabec <jernej.skrabec@...il.com>, 
 Samuel Holland <samuel@...lland.org>
Cc: linux-arm-kernel@...ts.infradead.org, linux-gpio@...r.kernel.org, 
 linux-kernel@...r.kernel.org, asahi@...ts.linux.dev, soc@...ts.linux.dev, 
 linux-sunxi@...ts.linux.dev, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 05/16] pinctrl: wmt: 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/vt8500/pinctrl-wmt.c | 17 ++++++++++++-----
 1 file changed, 12 insertions(+), 5 deletions(-)

diff --git a/drivers/pinctrl/vt8500/pinctrl-wmt.c b/drivers/pinctrl/vt8500/pinctrl-wmt.c
index fce92111a32e4976bd31c7e9845e4fd08a7affa3..767c6808a463ede61aee61b63f28ee38185b7633 100644
--- a/drivers/pinctrl/vt8500/pinctrl-wmt.c
+++ b/drivers/pinctrl/vt8500/pinctrl-wmt.c
@@ -507,8 +507,8 @@ static int wmt_gpio_get_value(struct gpio_chip *chip, unsigned offset)
 	return !!(readl_relaxed(data->base + reg_data_in) & BIT(bit));
 }
 
-static void wmt_gpio_set_value(struct gpio_chip *chip, unsigned offset,
-			       int val)
+static int wmt_gpio_set_value(struct gpio_chip *chip, unsigned int offset,
+			      int val)
 {
 	struct wmt_pinctrl_data *data = gpiochip_get_data(chip);
 	u32 bank = WMT_BANK_FROM_PIN(offset);
@@ -517,19 +517,26 @@ static void wmt_gpio_set_value(struct gpio_chip *chip, unsigned offset,
 
 	if (reg_data_out == NO_REG) {
 		dev_err(data->dev, "no data out register defined\n");
-		return;
+		return -EINVAL;
 	}
 
 	if (val)
 		wmt_setbits(data, reg_data_out, BIT(bit));
 	else
 		wmt_clearbits(data, reg_data_out, BIT(bit));
+
+	return 0;
 }
 
 static int wmt_gpio_direction_output(struct gpio_chip *chip, unsigned offset,
 				     int value)
 {
-	wmt_gpio_set_value(chip, offset, value);
+	int ret;
+
+	ret = wmt_gpio_set_value(chip, offset, value);
+	if (ret)
+		return ret;
+
 	return pinctrl_gpio_direction_output(chip, offset);
 }
 
@@ -542,7 +549,7 @@ static const struct gpio_chip wmt_gpio_chip = {
 	.direction_input = pinctrl_gpio_direction_input,
 	.direction_output = wmt_gpio_direction_output,
 	.get = wmt_gpio_get_value,
-	.set = wmt_gpio_set_value,
+	.set_rv = wmt_gpio_set_value,
 	.can_sleep = false,
 };
 

-- 
2.48.1