diff options
Diffstat (limited to 'drivers/input/touchscreen/ad7879.c')
| -rw-r--r-- | drivers/input/touchscreen/ad7879.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/drivers/input/touchscreen/ad7879.c b/drivers/input/touchscreen/ad7879.c index b7ab7f9767ca..b6da5cee80eb 100644 --- a/drivers/input/touchscreen/ad7879.c +++ b/drivers/input/touchscreen/ad7879.c @@ -454,17 +454,28 @@ static void ad7879_gpio_set_value(struct gpio_chip *chip, static int ad7879_gpio_add(struct ad7879 *ts, const struct ad7879_platform_data *pdata) { + bool gpio_export; + int gpio_base; int ret = 0; + if (pdata) { + gpio_export = pdata->gpio_export; + gpio_base = pdata->gpio_base; + } else { + gpio_export = device_property_read_bool(ts->dev, + "gpio-controller"); + gpio_base = -1; + } + mutex_init(&ts->mutex); - if (pdata && pdata->gpio_export) { + if (gpio_export) { ts->gc.direction_input = ad7879_gpio_direction_input; ts->gc.direction_output = ad7879_gpio_direction_output; ts->gc.get = ad7879_gpio_get_value; ts->gc.set = ad7879_gpio_set_value; ts->gc.can_sleep = 1; - ts->gc.base = pdata->gpio_base; + ts->gc.base = gpio_base; ts->gc.ngpio = 1; ts->gc.label = "AD7879-GPIO"; ts->gc.owner = THIS_MODULE; |