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Commit 15f59cff authored by William Breathitt Gray's avatar William Breathitt Gray Committed by Linus Walleij
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gpio: 104-idio-16: Implement get_multiple callback 



The ACCES I/O 104-IDIO-16 series of devices provides 16
optically-isolated digital inputs accessed via two 8-bit ports. Since
eight input lines are acquired on a single port input read, the
104-IDIO-16 GPIO driver may improve multiple input reads by utilizing a
get_multiple callback. This patch implements the
idio_16_gpio_get_multiple function which serves as the respective
get_multiple callback.

Signed-off-by: default avatarWilliam Breathitt Gray <vilhelm.gray@gmail.com>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent 4784e710

drivers/gpio/gpio-104-idio-16.c

+15 −0
Original line number Diff line number Diff line
@@ -90,6 +90,20 @@ static int idio_16_gpio_get(struct gpio_chip *chip, unsigned offset) 
	return !!(inb(idio16gpio->base + 5) & (mask>>8));

}



static int idio_16_gpio_get_multiple(struct gpio_chip *chip,

	unsigned long *mask, unsigned long *bits)

{

	struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip);



	*bits = 0;

	if (*mask & GENMASK(23, 16))

		*bits |= (unsigned long)inb(idio16gpio->base + 1) << 16;

	if (*mask & GENMASK(31, 24))

		*bits |= (unsigned long)inb(idio16gpio->base + 5) << 24;



	return 0;

}



static void idio_16_gpio_set(struct gpio_chip *chip, unsigned offset, int value)

{

	struct idio_16_gpio *const idio16gpio = gpiochip_get_data(chip);
@@ -244,6 +258,7 @@ static int idio_16_probe(struct device *dev, unsigned int id) 
	idio16gpio->chip.direction_input = idio_16_gpio_direction_input;

	idio16gpio->chip.direction_output = idio_16_gpio_direction_output;

	idio16gpio->chip.get = idio_16_gpio_get;

	idio16gpio->chip.get_multiple = idio_16_gpio_get_multiple;

	idio16gpio->chip.set = idio_16_gpio_set;

	idio16gpio->chip.set_multiple = idio_16_gpio_set_multiple;

	idio16gpio->base = base[id];