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. Add a firmware property to address this. The common 'wakeup-source' property can't be used for that because the driver must be backward compatible with old firmwares which may assume the default on wakeup-source behaviour. So we need to go the other way by explicit disable the wakeup-source capability. [1] https://www.newhavendisplay.com/appnotes/datasheets/touchpanel/ \ FT5x26.pdf Signed-off-by: Marco Felsch <m.felsch@xxxxxxxxxxxxxx> --- drivers/input/touchscreen/edt-ft5x06.c | 11 ++++++++++- 1 file changed, 10 insertions(+), 1 deletion(-) diff --git a/drivers/input/touchscreen/edt-ft5x06.c b/drivers/input/touchscreen/edt-ft5x06.c index 9e328a82b765..aafb6f4e34d7 100644 --- a/drivers/input/touchscreen/edt-ft5x06.c +++ b/drivers/input/touchscreen/edt-ft5x06.c @@ -25,6 +25,7 @@ #include <linux/irq.h> #include <linux/kernel.h> #include <linux/module.h> +#include <linux/property.h> #include <linux/ratelimit.h> #include <linux/slab.h> #include <linux/uaccess.h> @@ -1047,6 +1048,7 @@ 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"); @@ -1084,6 +1086,13 @@ static int edt_ft5x06_ts_probe(struct i2c_client *client, return error; } + /* + * We need to go this way to keep backward compatibility with old DT's + * which may assume the default-on mechanism. + */ + en_wakeup = !device_property_present(&client->dev, + "edt,disable-wakeup-source"); + if (tsdata->wake_gpio) { usleep_range(5000, 6000); gpiod_set_value_cansleep(tsdata->wake_gpio, 1); @@ -1172,7 +1181,7 @@ 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
