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.
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@xxxxxxxxx>
---
.../devicetree/bindings/input/touchscreen/ad7879.txt | 1 +
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;
--
2.11.0.483.g087da7b7c-goog
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