Commit 4c4ff6e3 authored by Diogo Ivo's avatar Diogo Ivo Committed by Bartosz Golaszewski
Browse files

gpio: max77620: Implement .get_direction() callback 



Add support for reporting the current GPIO line direction by implementing
the .get_direction() callback for the MAX77620 GPIO controller.

Signed-off-by: default avatarDiogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Reviewed-by: default avatarLinus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260127-smaug-spi_flash-v1-1-5fd334415118@tecnico.ulisboa.pt


Signed-off-by: default avatarBartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
parent 274ea0f1

drivers/gpio/gpio-max77620.c

+19 −0
Original line number Diff line number Diff line
@@ -132,6 +132,24 @@ static const struct irq_chip max77620_gpio_irqchip = { 
	GPIOCHIP_IRQ_RESOURCE_HELPERS,

};



static int max77620_gpio_get_dir(struct gpio_chip *gc, unsigned int offset)

{

	struct max77620_gpio *mgpio = gpiochip_get_data(gc);

	unsigned int val;

	int ret;



	ret = regmap_read(mgpio->rmap, GPIO_REG_ADDR(offset), &val);

	if (ret < 0) {

		dev_err(mgpio->dev, "CNFG_GPIOx read failed: %d\n", ret);

		return ret;

	}



	if (val & MAX77620_CNFG_GPIO_DIR_MASK)

		return GPIO_LINE_DIRECTION_IN;

	else

		return GPIO_LINE_DIRECTION_OUT;

}



static int max77620_gpio_dir_input(struct gpio_chip *gc, unsigned int offset)

{

	struct max77620_gpio *mgpio = gpiochip_get_data(gc);
@@ -308,6 +326,7 @@ static int max77620_gpio_probe(struct platform_device *pdev) 


	mgpio->gpio_chip.label = pdev->name;

	mgpio->gpio_chip.parent = pdev->dev.parent;

	mgpio->gpio_chip.get_direction = max77620_gpio_get_dir;

	mgpio->gpio_chip.direction_input = max77620_gpio_dir_input;

	mgpio->gpio_chip.get = max77620_gpio_get;

	mgpio->gpio_chip.direction_output = max77620_gpio_dir_output;