linux-kernel - [PATCH AUTOSEL 4.19 06/15] HID: Ignore battery for Elan touchscreen on ASUS UX550

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Date:   Tue, 19 Jan 2021 20:27:31 -0500
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Seth Miller <miller.seth@...il.com>, Jiri Kosina <jkosina@...e.cz>,
        Sasha Levin <sashal@...nel.org>, linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 4.19 06/15] HID: Ignore battery for Elan touchscreen on ASUS UX550

From: Seth Miller <miller.seth@...il.com>

[ Upstream commit 7c38e769d5c508939ce5dc26df72602f3c902342 ]

Battery status is being reported for the Elan touchscreen on ASUS
UX550 laptops despite not having a batter. It always shows either 0 or
1%.

Signed-off-by: Seth Miller <miller.seth@...il.com>
Signed-off-by: Jiri Kosina <jkosina@...e.cz>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 drivers/hid/hid-ids.h   | 1 +
 drivers/hid/hid-input.c | 2 ++
 2 files changed, 3 insertions(+)

diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h
index 6d118da1615d4..ab2be7a115d8f 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -386,6 +386,7 @@
 #define USB_DEVICE_ID_TOSHIBA_CLICK_L9W	0x0401
 #define USB_DEVICE_ID_HP_X2		0x074d
 #define USB_DEVICE_ID_HP_X2_10_COVER	0x0755
+#define USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN	0x2706
 
 #define USB_VENDOR_ID_ELECOM		0x056e
 #define USB_DEVICE_ID_ELECOM_BM084	0x0061
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 13deb9a676855..4dd151b2924e2 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -334,6 +334,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
 	{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_LOGITECH,
 		USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),
 	  HID_BATTERY_QUIRK_IGNORE },
+	{ HID_USB_DEVICE(USB_VENDOR_ID_ELAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),
+	  HID_BATTERY_QUIRK_IGNORE },
 	{}
 };
 
-- 
2.27.0