[PATCH v2 4/5] Input: edt-ft5x06 - make wakeup-source switchable

[Marco Felsch <m.felsch@pengutronix.de>]

Since day one the touch controller acts as wakeup-source. This seems to
be wrong since the device supports deep-sleep mechanism [1] which
requires a reset to leave it. Also some designs won't use the
touchscreen as wakeup-source.

According discussion [2] we decided to break backward compatibility and
go the common way by using the 'wakeup-source' device-property.

[1] https://www.newhavendisplay.com/appnotes/datasheets/touchpanel/FT5x26.pdf
[2] https://patchwork.kernel.org/patch/11149037/

Signed-off-by: Marco Felsch <m.felsch@pengutronix.de>
---
v2:
- make use of common wakeup-source property
- adapt commit message

 drivers/input/touchscreen/edt-ft5x06.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c
index e1b31fd525e2..8d2ec7947f0e 100644
--- a/drivers/input/touchscreen/edt-ft5x06.c
+++ b/drivers/input/touchscreen/edt-ft5x06.c
@@ -24,6 +24,7 @@
 #include <linux/irq.h>
 #include <linux/kernel.h>
 #include <linux/module.h>
+#include <linux/property.h>
 #include <linux/ratelimit.h>
 #include <linux/regulator/consumer.h>
 #include <linux/slab.h>
@@ -1056,6 +1057,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 	unsigned long irq_flags;
 	int error;
 	char fw_version[EDT_NAME_LEN];
+	bool en_wakeup;
 
 	dev_dbg(&client->dev, "probing for EDT FT5x06 I2C\n");
 
@@ -1114,6 +1116,8 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 		return error;
 	}
 
+	en_wakeup = device_property_present(&client->dev, "wakeup-source");
+
 	if (tsdata->wake_gpio) {
 		usleep_range(5000, 6000);
 		gpiod_set_value_cansleep(tsdata->wake_gpio, 1);
@@ -1208,7 +1212,7 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client,
 		return error;
 
 	edt_ft5x06_ts_prepare_debugfs(tsdata, dev_driver_string(&client->dev));
-	device_init_wakeup(&client->dev, 1);
+	device_init_wakeup(&client->dev, en_wakeup);
 
 	dev_dbg(&client->dev,
 		"EDT FT5x06 initialized: IRQ %d, WAKE pin %d, Reset pin %d.\n",
-- 
2.20.1