diff options
| author | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-02-17 19:45:59 +0100 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2017-02-23 18:21:27 +0100 |
| commit | b621e30be6120f1b20c6077a3462dd261d6ecc90 (patch) | |
| tree | 2eede0fa0a0e5a381b7c959cba11271ff4aaf4e0 | |
| parent | Input: ad7879 - use more devm interfaces (diff) | |
| download | linux-b621e30be6120f1b20c6077a3462dd261d6ecc90.tar.xz linux-b621e30be6120f1b20c6077a3462dd261d6ecc90.zip | |
Input: ad7879 - allow exporting AUX/VBAT/GPIO pin via device property
Up until now only platforms using legacy platform data were able to switch
AUX/VBAT/GPIO pin in GPIO mode and use it as regular GPIO line. Let's
allow platforms using generic device properties to do the same.
Reviewed-by: Michael Hennerich <michael.hennerich@analog.com>
Tested-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
| -rw-r--r-- | Documentation/devicetree/bindings/input/touchscreen/ad7879.txt | 1 | ||||
| -rw-r--r-- | drivers/input/touchscreen/ad7879.c | 15 |
2 files changed, 14 insertions, 2 deletions
diff --git a/Documentation/devicetree/bindings/input/touchscreen/ad7879.txt b/Documentation/devicetree/bindings/input/touchscreen/ad7879.txt index e3f22d23fc8f..323b6098be19 100644 --- a/Documentation/devicetree/bindings/input/touchscreen/ad7879.txt +++ b/Documentation/devicetree/bindings/input/touchscreen/ad7879.txt @@ -35,6 +35,7 @@ Optional properties: - adi,conversion-interval: : 0 : convert one time only 1-255: 515us + val * 35us (up to 9.440ms) This property has to be a '/bits/ 8' value +- gpio-controller : Switch AUX/VBAT/GPIO pin to GPIO mode Example: 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; |