[PATCH v3 5/5] platform/x86: uniwill-laptop: Handle super key changed event

[Armin Wolf <W_Armin@gmx.de>]

On many devices, the user can enable/disable the super key by
pressing Fn + F9. Forward the associated event to the
super_key_enable sysfs attribute as a poll notification.

Signed-off-by: Armin Wolf <W_Armin@gmx.de>
---
 drivers/platform/x86/uniwill/uniwill-acpi.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/platform/x86/uniwill/uniwill-acpi.c b/drivers/platform/x86/uniwill/uniwill-acpi.c
index 8f214489e9ed..c1478878569b 100644
--- a/drivers/platform/x86/uniwill/uniwill-acpi.c
+++ b/drivers/platform/x86/uniwill/uniwill-acpi.c
@@ -385,8 +385,6 @@ static const struct key_entry uniwill_keymap[] = {
 	 */
 	{ KE_IGNORE,    UNIWILL_OSD_SUPER_KEY_DISABLE,		{ KEY_UNKNOWN }},
 	{ KE_IGNORE,    UNIWILL_OSD_SUPER_KEY_ENABLE,		{ KEY_UNKNOWN }},
-	/* Optional, might not be reported by all devices */
-	{ KE_IGNORE,	UNIWILL_OSD_SUPER_KEY_STATE_CHANGED,	{ KEY_UNKNOWN }},
 
 	/* Reported in manual mode when toggling the airplane mode status */
 	{ KE_KEY,       UNIWILL_OSD_RFKILL,                     { KEY_RFKILL }},
@@ -1357,6 +1355,14 @@ static int uniwill_notifier_call(struct notifier_block *nb, unsigned long action
 	struct uniwill_battery_entry *entry;
 
 	switch (action) {
+	case UNIWILL_OSD_SUPER_KEY_STATE_CHANGED:
+		/* Optional, might not be reported by all devices */
+		if (!uniwill_device_supports(data, UNIWILL_FEATURE_SUPER_KEY))
+			return NOTIFY_DONE;
+
+		sysfs_notify(&data->dev->kobj, NULL, "super_key_enable");
+
+		return NOTIFY_OK;
 	case UNIWILL_OSD_BATTERY_ALERT:
 		if (!uniwill_device_supports(data, UNIWILL_FEATURE_BATTERY))
 			return NOTIFY_DONE;
-- 
2.39.5