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.
Add a return value checking for waking up the controller in the probe
function, this guarantee only a workable device can pass init.
Signed-off-by: Hui Wang <jason77.wang@xxxxxxxxx>
---
drivers/input/touchscreen/egalax_ts.c | 19 ++++++++++++++++---
1 files changed, 16 insertions(+), 3 deletions(-)
diff --git a/drivers/input/touchscreen/egalax_ts.c b/drivers/input/touchscreen/egalax_ts.c
index 70524dd..54361c9 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, "wakeup-gpios", 0);
+ if (!gpio_is_valid(gpio))
+ return -ENODEV;
ret = gpio_request(gpio, "egalax_irq");
if (ret < 0) {
@@ -181,7 +189,12 @@ static int __devinit egalax_ts_probe(struct i2c_client *client,
ts->input_dev = input_dev;
/* controller may be in sleep, wake it up. */
- egalax_wake_up_device(client);
+ ret = egalax_wake_up_device(client);
+ if (ret < 0) {
+ dev_err(&client->dev, "Failed to wake up the controller\n");
+ error = ret;
+ goto err_free_dev;
+ }
ret = egalax_firmware_version(client);
if (ret < 0) {
--
1.7.6
--
To unsubscribe from this list: send the line "unsubscribe linux-input" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at http://vger.kernel.org/majordomo-info.html
