HID: logitech-hidpp: notify battery on connect

When a device reconnects, there is a high chance its power supply has
been changed (for a battery replacement for instance). Just forward
the battery state here.

Signed-off-by: Benjamin Tissoires <benjamin.tissoires@redhat.com>
Tested-by: Bastien Nocera <hadess@hadess.net>
Signed-off-by: Jiri Kosina <jkosina@suse.cz>

1 files changed, 7 insertions, 0 deletions

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 22129ddac3ae..0781d2bb00d6 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2463,6 +2463,13 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
 
         hidpp_initialize_battery(hidpp);
 
+        /* forward current battery state */
+        if (hidpp->capabilities & HIDPP_CAPABILITY_HIDPP20_BATTERY) {
+                hidpp20_query_battery_info(hidpp);
+                if (hidpp->battery.ps)
+                        power_supply_changed(hidpp->battery.ps);
+        }
+
         if (!(hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT) || hidpp->delayed_input)
                 /* if the input nodes are already created, we can stop now */
                 return;