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Input: ad7879 - allow exporting AUX/VBAT/GPIO pin via device property

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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>
This commit is contained in:
Dmitry Torokhov 2017-02-17 10:45:59 -08:00
parent 069b2e2cd7
commit b621e30be6
2 changed files with 14 additions and 2 deletions
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1
Documentation/devicetree/bindings/input/touchscreen/ad7879.txt
View File

@ -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:

15
drivers/input/touchscreen/ad7879.c
View File

@ -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;