linux-kernel - [PATCH v3 13/19] HID: logitech-hidpp: notify battery on connect

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Date:   Mon, 27 Mar 2017 16:59:33 +0200
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Jiri Kosina <jikos@...nel.org>, Bastien Nocera <hadess@...ess.net>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH v3 13/19] 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@...hat.com>

---

changes in v3:
- moved up in the series

no changes in v2
---
 drivers/hid/hid-logitech-hidpp.c | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 22129dd..0781d2b 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;
-- 
2.9.3