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Commit 9298539c authored by Linus Walleij's avatar Linus Walleij
Browse files

gpio: htc-egpio: add .get_direction() support 



This makes is possible to read out the current direction of a
GPIO line on the HTC CPLD GPIO expander.

Suggested-by: default avatarRussell King <linux@arm.linux.org.uk>
Signed-off-by: default avatarLinus Walleij <linus.walleij@linaro.org>
parent c82064f2

drivers/gpio/gpio-htc-egpio.c

+10 −0
Original line number Diff line number Diff line
@@ -225,6 +225,15 @@ static int egpio_direction_output(struct gpio_chip *chip, 
	}

}



static int egpio_get_direction(struct gpio_chip *chip, unsigned offset)

{

	struct egpio_chip *egpio;



	egpio = gpiochip_get_data(chip);



	return !test_bit(offset, &egpio->is_out);

}



static void egpio_write_cache(struct egpio_info *ei)

{

	int               i;
@@ -327,6 +336,7 @@ static int __init egpio_probe(struct platform_device *pdev) 
		chip->set             = egpio_set;

		chip->direction_input = egpio_direction_input;

		chip->direction_output = egpio_direction_output;

		chip->get_direction   = egpio_get_direction;

		chip->base            = pdata->chip[i].gpio_base;

		chip->ngpio           = pdata->chip[i].num_gpios;