Commit dbb763b8 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven Committed by Linus Walleij
Browse files

gpio: rcar: Implement gpiochip.set_multiple() 



This allows to set multiple outputs using a single register write.

Signed-off-by: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent f8583422

drivers/gpio/gpio-rcar.c

+20 −0
Original line number Diff line number Diff line
@@ -336,6 +336,25 @@ static void gpio_rcar_set(struct gpio_chip *chip, unsigned offset, int value) 
	spin_unlock_irqrestore(&p->lock, flags);

}



static void gpio_rcar_set_multiple(struct gpio_chip *chip, unsigned long *mask,

				   unsigned long *bits)

{

	struct gpio_rcar_priv *p = gpiochip_get_data(chip);

	unsigned long flags;

	u32 val, bankmask;



	bankmask = mask[0] & GENMASK(chip->ngpio - 1, 0);

	if (!bankmask)

		return;



	spin_lock_irqsave(&p->lock, flags);

	val = gpio_rcar_read(p, OUTDT);

	val &= ~bankmask;

	val |= (bankmask & bits[0]);

	gpio_rcar_write(p, OUTDT, val);

	spin_unlock_irqrestore(&p->lock, flags);

}



static int gpio_rcar_direction_output(struct gpio_chip *chip, unsigned offset,

				      int value)

{
@@ -476,6 +495,7 @@ static int gpio_rcar_probe(struct platform_device *pdev) 
	gpio_chip->get = gpio_rcar_get;

	gpio_chip->direction_output = gpio_rcar_direction_output;

	gpio_chip->set = gpio_rcar_set;

	gpio_chip->set_multiple = gpio_rcar_set_multiple;

	gpio_chip->label = name;

	gpio_chip->parent = dev;

	gpio_chip->owner = THIS_MODULE;