linux-kernel - [PATCH AUTOSEL 5.15 11/21] HID: add Lenovo Yoga C630 battery quirk

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Message-Id: <20220910211752.70291-11-sashal@kernel.org>
Date:   Sat, 10 Sep 2022 17:17:42 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Steev Klimaszewski <steev@...i.org>, Jiri Kosina <jkosina@...e.cz>,
        Sasha Levin <sashal@...nel.org>, jikos@...nel.org,
        benjamin.tissoires@...hat.com, linux-input@...r.kernel.org
Subject: [PATCH AUTOSEL 5.15 11/21] HID: add Lenovo Yoga C630 battery quirk

From: Steev Klimaszewski <steev@...i.org>

[ Upstream commit 3a47fa7b14c7d9613909a844aba27f99d3c58634 ]

Similar to the Surface Go devices, the Elantech touchscreen/digitizer in
the Lenovo Yoga C630 mistakenly reports the battery of the stylus, and
always reports an empty battery.

Apply the HID_BATTERY_QUIRK_IGNORE quirk to ignore this battery and
prevent the erroneous low battery warnings.

Signed-off-by: Steev Klimaszewski <steev@...i.org>
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 ceaa36fc429ef..cb2b48d6915ee 100644
--- a/drivers/hid/hid-ids.h
+++ b/drivers/hid/hid-ids.h
@@ -399,6 +399,7 @@
 #define USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN	0x2706
 #define I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN	0x261A
 #define I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN	0x2A1C
+#define I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN	0x279F
 
 #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 125043a28a35c..f197aed6444a5 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -335,6 +335,8 @@ static const struct hid_device_id hid_battery_quirks[] = {
 	  HID_BATTERY_QUIRK_IGNORE },
 	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_SURFACE_GO2_TOUCHSCREEN),
 	  HID_BATTERY_QUIRK_IGNORE },
+	{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, I2C_DEVICE_ID_LENOVO_YOGA_C630_TOUCHSCREEN),
+	  HID_BATTERY_QUIRK_IGNORE },
 	{}
 };
 
-- 
2.35.1