From 5bfbdc9caa7e16b2a77a62a9f9a63b5693e23716 Mon Sep 17 00:00:00 2001 From: Guenter Roeck Date: Thu, 12 Sep 2013 08:49:54 +0900 Subject: 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 Signed-off-by: Chanwoo Choi --- drivers/extcon/extcon-gpio.c | 4 ++++ 1 file changed, 4 insertions(+) (limited to 'drivers/extcon') 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) -- cgit v1.2.3