diff options
| author | Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> | 2013-11-09 14:24:09 +0100 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2013-11-11 09:05:35 +0100 |
| commit | d7fc449a2ea8686f73403922f045b6d39baab27f (patch) | |
| tree | 083d5eaf0082e6f255ac038aaa97923913d52015 /drivers/gpio | |
| parent | fcc25285a2b98afd4e6c2324093b4f52f59a26d3 (diff) | |
| download | barebox-d7fc449a2ea8686f73403922f045b6d39baab27f.tar.gz barebox-d7fc449a2ea8686f73403922f045b6d39baab27f.tar.xz | |
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>
Diffstat (limited to 'drivers/gpio')
| -rw-r--r-- | drivers/gpio/gpio-dw.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpio/gpio-dw.c b/drivers/gpio/gpio-dw.c index 791488a19d..65770422ae 100644 --- a/drivers/gpio/gpio-dw.c +++ b/drivers/gpio/gpio-dw.c @@ -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, }; |