[PATCH 1/2] Input: egalax_ts: get gpio from devicetree node

[Hui Wang <jason77.wang@gmail.com>]

The irq_to_gpio() is old, most platforms use GENERIC_GPIO framework and
don't support this API anymore.

The i.MX6q sabrelite platform equips an egalax touchscreen controller,
and this platform already transfered to GENERIC_GPIO framework, to
support this driver, we use a more generic way to get gpio.

Signed-off-by: Hui Wang <jason77.wang@gmail.com>
---
 drivers/input/touchscreen/egalax_ts.c |   12 ++++++++++--
 1 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c
index 70524dd..b94eb50 100644
--- a/drivers/input/touchscreen/egalax_ts.c
+++ b/drivers/input/touchscreen/egalax_ts.c
@@ -28,6 +28,7 @@
 #include <linux/slab.h>
 #include <linux/bitops.h>
 #include <linux/input/mt.h>
+#include <linux/of_gpio.h>
 
 /*
  * Mouse Mode: some panel may configure the controller to mouse mode,
@@ -122,8 +123,15 @@ static irqreturn_t egalax_ts_interrupt(int irq, void *dev_id)
 /* wake up controller by an falling edge of interrupt gpio.  */
 static int egalax_wake_up_device(struct i2c_client *client)
 {
-	int gpio = irq_to_gpio(client->irq);
-	int ret;
+	struct device_node *np = client->dev.of_node;
+	int gpio, ret;
+
+	if (!np)
+		return -ENODEV;
+
+	gpio = of_get_named_gpio(np, "irq-gpio", 0);
+	if (!gpio_is_valid(gpio))
+		return -ENODEV;
 
 	ret = gpio_request(gpio, "egalax_irq");
 	if (ret < 0) {
-- 
1.7.6