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gpio: max77620: Implement .get_direction() callback

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

Signed-off-by: Diogo Ivo <diogo.ivo@tecnico.ulisboa.pt>
Reviewed-by: Linus Walleij <linusw@kernel.org>
Link: https://patch.msgid.link/20260127-smaug-spi_flash-v1-1-5fd334415118@tecnico.ulisboa.pt
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@oss.qualcomm.com>
This commit is contained in:
Diogo Ivo 2026-01-27 18:52:42 +00:00 committed by Bartosz Golaszewski
parent 274ea0f168
commit 4c4ff6e387
1 changed files with 19 additions and 0 deletions
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19
drivers/gpio/gpio-max77620.c
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@ -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;