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    Subject[PATCH 3/6] extcon-gpio: Add support for active-low presence detect pins
    Date
    Signed-off-by: Guenter Roeck <linux@roeck-us.net>
    ---
    drivers/extcon/extcon-gpio.c | 4 +++-
    include/linux/extcon/extcon-gpio.h | 1 +
    2 files changed, 4 insertions(+), 1 deletion(-)

    diff --git a/drivers/extcon/extcon-gpio.c b/drivers/extcon/extcon-gpio.c
    index 973600e..d4e3c89 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;
    @@ -48,7 +49,7 @@ static void gpio_extcon_work(struct work_struct *work)
    container_of(to_delayed_work(work), struct gpio_extcon_data,
    work);

    - state = gpio_get_value(data->gpio);
    + state = gpio_get_value(data->gpio) ^ data->gpio_active_low;
    extcon_set_state(&data->edev, state);
    }

    @@ -96,6 +97,7 @@ 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)
    diff --git a/include/linux/extcon/extcon-gpio.h b/include/linux/extcon/extcon-gpio.h
    index 2d8307f..1613899 100644
    --- a/include/linux/extcon/extcon-gpio.h
    +++ b/include/linux/extcon/extcon-gpio.h
    @@ -41,6 +41,7 @@
    struct gpio_extcon_platform_data {
    const char *name;
    unsigned gpio;
    + bool gpio_active_low;
    unsigned long debounce;
    unsigned long irq_flags;

    --
    1.7.9.7


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