diff options
| author | Guenter Roeck <linux@roeck-us.net> | 2013-09-12 08:49:54 +0900 |
|---|---|---|
| committer | Chanwoo Choi <cw00.choi@samsung.com> | 2013-09-27 09:37:01 +0900 |
| commit | 5bfbdc9caa7e16b2a77a62a9f9a63b5693e23716 (patch) | |
| tree | c2c38080043b0ae1fba1fe462d691436ba25d9fc /drivers/extcon/extcon-gpio.c | |
| parent | 7c0f6558f893eb5eddb52ee0fa84c2d43b2c199a (diff) | |
| download | lwn-5bfbdc9caa7e16b2a77a62a9f9a63b5693e23716.tar.gz lwn-5bfbdc9caa7e16b2a77a62a9f9a63b5693e23716.zip | |
extcon: gpio: Add support for active-low presence to detect pins
This patch add 'gpio_active_low' field to 'struct gpio_extcon_data'
to check whether gpio active state is 1(high) or 0(low).
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Diffstat (limited to 'drivers/extcon/extcon-gpio.c')
| -rw-r--r-- | drivers/extcon/extcon-gpio.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c index cd7dbb60f60f..b02c670ef01d 100644 --- a/drivers/extcon/extcon-gpio.c +++ b/drivers/extcon/extcon-gpio.c @@ -34,6 +34,7 @@ struct gpio_extcon_data { struct extcon_dev edev; unsigned gpio; + bool gpio_active_low; const char *state_on; const char *state_off; int irq; @@ -49,6 +50,8 @@ static void gpio_extcon_work(struct work_struct *work) work); state = gpio_get_value(data->gpio); + if (data->gpio_active_low) + state = !state; extcon_set_state(&data->edev, state); } @@ -96,6 +99,7 @@ static int gpio_extcon_probe(struct platform_device *pdev) extcon_data->edev.name = pdata->name; extcon_data->gpio = pdata->gpio; + extcon_data->gpio_active_low = pdata->gpio_active_low; extcon_data->state_on = pdata->state_on; extcon_data->state_off = pdata->state_off; if (pdata->state_on && pdata->state_off) |