linux-kernel - [PATCH 10/17] HID: logitech-hidpp: notify battery on connect

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Date:   Tue, 17 Jan 2017 15:35:40 +0100
From:   Benjamin Tissoires <benjamin.tissoires@...hat.com>
To:     Jiri Kosina <jikos@...nel.org>, Bastien Nocera <hadess@...ess.net>,
        Peter Hutterer <peter.hutterer@...-t.net>,
        Nestor Lopez Casado <nlopezcasad@...itech.com>,
        Olivier Gay <ogay@...itech.com>,
        Simon Wood <simon@...gewell.org>
Cc:     linux-input@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH 10/17] 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>
---
 drivers/hid/hid-logitech-hidpp.c | 14 +++++++++++---
 1 file changed, 11 insertions(+), 3 deletions(-)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 1fd95c2..3ae2f41 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -2557,9 +2557,6 @@ static int hidpp_initialize_battery(struct hidpp_device *hidpp)
 			return ret;
 		hidpp->quirks |= HIDPP_QUIRK_HIDPP20_BATTERY;
 	} else {
-		ret = hidpp10_enable_battery_reporting(hidpp);
-		if (ret)
-			return -ENOENT;
 		ret = hidpp10_query_battery_status(hidpp);
 		if (ret) {
 			ret = hidpp10_query_battery_mileage(hidpp);
@@ -2693,6 +2690,17 @@ static void hidpp_connect_event(struct hidpp_device *hidpp)
 
 	hidpp_initialize_battery(hidpp);
 
+	/* forward current battery state */
+	if (hidpp->quirks & HIDPP_QUIRK_HIDPP10_BATTERY) {
+		hidpp10_enable_battery_reporting(hidpp);
+		hidpp10_query_battery_status(hidpp);
+		hidpp10_query_battery_mileage(hidpp);
+	} else if (hidpp->quirks & HIDPP_QUIRK_HIDPP20_BATTERY) {
+		hidpp20_query_battery_info(hidpp);
+	}
+	if (hidpp->battery.ps)
+		power_supply_changed(hidpp->battery.ps);
+
 	if (!(hidpp->quirks & HIDPP_QUIRK_NO_HIDINPUT))
 		/* if HID created the input nodes for us, we can stop now */
 		return;
-- 
2.9.3