linux-kernel - [PATCH 04/12] gpio: thunderx: use new GPIO line value setter callbacks

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Message-Id: <20250702-gpiochip-set-rv-gpio-round3-v1-4-0d23be74f71d@linaro.org>
Date: Wed, 02 Jul 2025 11:14:05 +0200
From: Bartosz Golaszewski <brgl@...ev.pl>
To: Linus Walleij <linus.walleij@...aro.org>, 
 Bartosz Golaszewski <brgl@...ev.pl>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>, Robert Richter <rric@...nel.org>, 
 Aaro Koskinen <aaro.koskinen@....fi>, 
 Andreas Kemnade <andreas@...nade.info>, Kevin Hilman <khilman@...libre.com>, 
 Roger Quadros <rogerq@...nel.org>, Tony Lindgren <tony@...mide.com>
Cc: linux-gpio@...r.kernel.org, linux-tegra@...r.kernel.org, 
 linux-kernel@...r.kernel.org, linux-omap@...r.kernel.org, 
 Bartosz Golaszewski <bartosz.golaszewski@...aro.org>
Subject: [PATCH 04/12] gpio: thunderx: 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-thunderx.c | 18 +++++++++++-------
 1 file changed, 11 insertions(+), 7 deletions(-)

diff --git a/drivers/gpio/gpio-thunderx.c b/drivers/gpio/gpio-thunderx.c
index 5b851e904c11f5381cd4890828ecd956b78e2f00..eb6a1f0279c09a832ac71d76de8f696d9c28dd17 100644
--- a/drivers/gpio/gpio-thunderx.c
+++ b/drivers/gpio/gpio-thunderx.c
@@ -116,8 +116,8 @@ static int thunderx_gpio_dir_in(struct gpio_chip *chip, unsigned int line)
 	return 0;
 }
 
-static void thunderx_gpio_set(struct gpio_chip *chip, unsigned int line,
-			      int value)
+static int thunderx_gpio_set(struct gpio_chip *chip, unsigned int line,
+			     int value)
 {
 	struct thunderx_gpio *txgpio = gpiochip_get_data(chip);
 	int bank = line / 64;
@@ -127,6 +127,8 @@ static void thunderx_gpio_set(struct gpio_chip *chip, unsigned int line,
 		(bank * GPIO_2ND_BANK) + (value ? GPIO_TX_SET : GPIO_TX_CLR);
 
 	writeq(BIT_ULL(bank_bit), reg);
+
+	return 0;
 }
 
 static int thunderx_gpio_dir_out(struct gpio_chip *chip, unsigned int line,
@@ -269,9 +271,9 @@ static int thunderx_gpio_get(struct gpio_chip *chip, unsigned int line)
 		return masked_bits != 0;
 }
 
-static void thunderx_gpio_set_multiple(struct gpio_chip *chip,
-				       unsigned long *mask,
-				       unsigned long *bits)
+static int thunderx_gpio_set_multiple(struct gpio_chip *chip,
+				      unsigned long *mask,
+				      unsigned long *bits)
 {
 	int bank;
 	u64 set_bits, clear_bits;
@@ -283,6 +285,8 @@ static void thunderx_gpio_set_multiple(struct gpio_chip *chip,
 		writeq(set_bits, txgpio->register_base + (bank * GPIO_2ND_BANK) + GPIO_TX_SET);
 		writeq(clear_bits, txgpio->register_base + (bank * GPIO_2ND_BANK) + GPIO_TX_CLR);
 	}
+
+	return 0;
 }
 
 static void thunderx_gpio_irq_ack(struct irq_data *d)
@@ -529,8 +533,8 @@ static int thunderx_gpio_probe(struct pci_dev *pdev,
 	chip->direction_input = thunderx_gpio_dir_in;
 	chip->get = thunderx_gpio_get;
 	chip->direction_output = thunderx_gpio_dir_out;
-	chip->set = thunderx_gpio_set;
-	chip->set_multiple = thunderx_gpio_set_multiple;
+	chip->set_rv = thunderx_gpio_set;
+	chip->set_multiple_rv = thunderx_gpio_set_multiple;
 	chip->set_config = thunderx_gpio_set_config;
 	girq = &chip->irq;
 	gpio_irq_chip_set_chip(girq, &thunderx_gpio_irq_chip);

-- 
2.48.1