linux-kernel - [PATCH 06/12] gpio: mpsse: use new GPIO line value setter callbacks

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Message-Id: <20250610-gpiochip-set-rv-gpio-v1-6-3a9a3c1472ff@linaro.org>
Date: Tue, 10 Jun 2025 14:33:16 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Marek Behún <kabel@...nel.org>, 
 Conor Dooley <conor.dooley@...rochip.com>, 
 Daire McNamara <daire.mcnamara@...rochip.com>, 
 Daniel Palmer <daniel@...ngy.jp>, Romain Perier <romain.perier@...il.com>, 
 Avi Fishman <avifishman70@...il.com>, Tomer Maimon <tmaimon77@...il.com>, 
 Tali Perry <tali.perry1@...il.com>, Patrick Venture <venture@...gle.com>, 
 Nancy Yuen <yuenn@...gle.com>, Benjamin Fair <benjaminfair@...gle.com>, 
 Grygorii Strashko <grygorii.strashko@...com>, 
 Santosh Shilimkar <ssantosh@...nel.org>, Kevin Hilman <khilman@...nel.org>
Cc: linux-gpio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-riscv@...ts.infradead.org, linux-arm-kernel@...ts.infradead.org, 
 openbmc@...ts.ozlabs.org, linux-omap@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 06/12] gpio: mpsse: 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/gpio/gpio-mpsse.c | 22 ++++++++++------------
 1 file changed, 10 insertions(+), 12 deletions(-)

diff --git a/drivers/gpio/gpio-mpsse.c b/drivers/gpio/gpio-mpsse.c
index 3ea32c5e33d1a445dec02996744429f17ec61af7..b17de08e9e03c5ce05ca5c1bbbb8a0f83fc2ba03 100644
--- a/drivers/gpio/gpio-mpsse.c
+++ b/drivers/gpio/gpio-mpsse.c
@@ -160,8 +160,8 @@ static int gpio_mpsse_get_bank(struct mpsse_priv *priv, u8 bank)
 	return buf;
 }
 
-static void gpio_mpsse_set_multiple(struct gpio_chip *chip, unsigned long *mask,
-				    unsigned long *bits)
+static int gpio_mpsse_set_multiple(struct gpio_chip *chip, unsigned long *mask,
+				   unsigned long *bits)
 {
 	unsigned long i, bank, bank_mask, bank_bits;
 	int ret;
@@ -180,11 +180,11 @@ static void gpio_mpsse_set_multiple(struct gpio_chip *chip, unsigned long *mask,
 
 			ret = gpio_mpsse_set_bank(priv, bank);
 			if (ret)
-				dev_err(&priv->intf->dev,
-					"Couldn't set values for bank %ld!",
-					bank);
+				return ret;
 		}
 	}
+
+	return 0;
 }
 
 static int gpio_mpsse_get_multiple(struct gpio_chip *chip, unsigned long *mask,
@@ -227,7 +227,7 @@ static int gpio_mpsse_gpio_get(struct gpio_chip *chip, unsigned int offset)
 		return 0;
 }
 
-static void gpio_mpsse_gpio_set(struct gpio_chip *chip, unsigned int offset,
+static int gpio_mpsse_gpio_set(struct gpio_chip *chip, unsigned int offset,
 			       int value)
 {
 	unsigned long mask = 0, bits = 0;
@@ -236,7 +236,7 @@ static void gpio_mpsse_gpio_set(struct gpio_chip *chip, unsigned int offset,
 	if (value)
 		__set_bit(offset, &bits);
 
-	gpio_mpsse_set_multiple(chip, &mask, &bits);
+	return gpio_mpsse_set_multiple(chip, &mask, &bits);
 }
 
 static int gpio_mpsse_direction_output(struct gpio_chip *chip,
@@ -249,9 +249,7 @@ static int gpio_mpsse_direction_output(struct gpio_chip *chip,
 	scoped_guard(mutex, &priv->io_mutex)
 		priv->gpio_dir[bank] |= BIT(bank_offset);
 
-	gpio_mpsse_gpio_set(chip, offset, value);
-
-	return 0;
+	return gpio_mpsse_gpio_set(chip, offset, value);
 }
 
 static int gpio_mpsse_direction_input(struct gpio_chip *chip,
@@ -450,9 +448,9 @@ static int gpio_mpsse_probe(struct usb_interface *interface,
 	priv->gpio.direction_input = gpio_mpsse_direction_input;
 	priv->gpio.direction_output = gpio_mpsse_direction_output;
 	priv->gpio.get = gpio_mpsse_gpio_get;
-	priv->gpio.set = gpio_mpsse_gpio_set;
+	priv->gpio.set_rv = gpio_mpsse_gpio_set;
 	priv->gpio.get_multiple = gpio_mpsse_get_multiple;
-	priv->gpio.set_multiple = gpio_mpsse_set_multiple;
+	priv->gpio.set_multiple_rv = gpio_mpsse_set_multiple;
 	priv->gpio.base = -1;
 	priv->gpio.ngpio = 16;
 	priv->gpio.offset = priv->intf_id * priv->gpio.ngpio;

-- 
2.48.1