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gpio: dw: add get_direction callback 

This adds a callback function to read the current state of a GPIOs
in/out direction.

Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
This commit is contained in:
Sebastian Hesselbarth 2013-11-09 14:24:09 +01:00 committed by Sascha Hauer
parent fcc25285a2
commit d7fc449a2e
1 changed files with 9 additions and 0 deletions
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9
drivers/gpio/gpio-dw.c
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@ -90,9 +90,18 @@ static int dw_gpio_direction_output(struct gpio_chip *gc,
return 0;
}
static int dw_gpio_get_direction(struct gpio_chip *gc, unsigned offset)
{
struct dw_gpio_instance *chip = to_dw_gpio(gc);
return (readl(chip->regs + DW_GPIO_DDR) & (1 << offset)) ?
GPIO_DIR_OUT : GPIO_DIR_IN;
}
static struct gpio_ops imx_gpio_ops = {
.direction_input = dw_gpio_direction_input,
.direction_output = dw_gpio_direction_output,
.get_direction = dw_gpio_get_direction,
.get = dw_gpio_get,
.set = dw_gpio_set,
};