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Commit 23087a05 authored by Laxman Dewangan's avatar Laxman Dewangan Committed by Linus Walleij
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gpio: max77620: use the new open drain callback 



The MAX77620 have a GPIO pins which can act as open drain or
push pull mode. Implement support for controlling this from GPIO
descriptor tables or other hardware descriptions such as
device tree by implementing the .set_single_ended() callback.

Signed-off-by: default avatarLaxman Dewangan <ldewangan@nvidia.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent ff93ec74

drivers/gpio/gpio-max77620.c

+23 −0
Original line number Diff line number Diff line
@@ -202,6 +202,28 @@ static void max77620_gpio_set(struct gpio_chip *gc, unsigned int offset, 
		dev_err(mgpio->dev, "CNFG_GPIO_OUT update failed: %d\n", ret);

}



static int max77620_gpio_set_single_ended(struct gpio_chip *gc,

					  unsigned int offset,

					  enum single_ended_mode mode)

{

	struct max77620_gpio *mgpio = gpiochip_get_data(gc);



	switch (mode) {

	case LINE_MODE_OPEN_DRAIN:

		return regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),

					  MAX77620_CNFG_GPIO_DRV_MASK,

					  MAX77620_CNFG_GPIO_DRV_OPENDRAIN);

	case LINE_MODE_PUSH_PULL:

		return regmap_update_bits(mgpio->rmap, GPIO_REG_ADDR(offset),

					  MAX77620_CNFG_GPIO_DRV_MASK,

					  MAX77620_CNFG_GPIO_DRV_PUSHPULL);

	default:

		break;

	}



	return -ENOTSUPP;

}



static int max77620_gpio_to_irq(struct gpio_chip *gc, unsigned int offset)

{

	struct max77620_gpio *mgpio = gpiochip_get_data(gc);
@@ -238,6 +260,7 @@ static int max77620_gpio_probe(struct platform_device *pdev) 
	mgpio->gpio_chip.direction_output = max77620_gpio_dir_output;

	mgpio->gpio_chip.set_debounce = max77620_gpio_set_debounce;

	mgpio->gpio_chip.set = max77620_gpio_set;

	mgpio->gpio_chip.set_single_ended = max77620_gpio_set_single_ended;

	mgpio->gpio_chip.to_irq = max77620_gpio_to_irq;

	mgpio->gpio_chip.ngpio = MAX77620_GPIO_NR;

	mgpio->gpio_chip.can_sleep = 1;