Many laptops can be woken up from Suspend-to-Idle by touchpad. This is
also the default behavior on other OSes.
So let's enable the wakeup support if the system defaults to
Suspend-to-Idle.
Signed-off-by: Kai-Heng Feng <kai.heng.feng@xxxxxxxxxxxxx>
---
v3:
- Use device_init_wakeup().
- Wording change.
v2:
- Fix compile error when ACPI is not enabled.
drivers/hid/i2c-hid/i2c-hid-core.c | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/drivers/hid/i2c-hid/i2c-hid-core.c b/drivers/hid/i2c-hid/i2c-hid-core.c
index 294c84e136d7..dae1d072daf6 100644
--- a/drivers/hid/i2c-hid/i2c-hid-core.c
+++ b/drivers/hid/i2c-hid/i2c-hid-core.c
@@ -931,6 +931,12 @@ static void i2c_hid_acpi_fix_up_power(struct device *dev)
acpi_device_fix_up_power(adev);
}
+static void i2c_hid_acpi_enable_wakeup(struct device *dev)
+{
+ if (acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)
+ device_init_wakeup(dev, true);
+}
+
static const struct acpi_device_id i2c_hid_acpi_match[] = {
{"ACPI0C50", 0 },
{"PNP0C50", 0 },
@@ -945,6 +951,8 @@ static inline int i2c_hid_acpi_pdata(struct i2c_client *client,
}
static inline void i2c_hid_acpi_fix_up_power(struct device *dev) {}
+
+static inline void i2c_hid_acpi_enable_wakeup(struct device *dev) {}
#endif
#ifdef CONFIG_OF
@@ -1072,6 +1080,8 @@ static int i2c_hid_probe(struct i2c_client *client,
i2c_hid_acpi_fix_up_power(&client->dev);
+ i2c_hid_acpi_enable_wakeup(&client->dev);
+
device_enable_async_suspend(&client->dev);
/* Make sure there is something at this address */
--
2.17.1
