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Date:   Tue, 10 Jan 2023 15:54:26 +0100 (CET)
From:   marco.rodolfi@tuta.io
To:     Jiri Kosina <jikos@kernel.org>,
        Benjamin Tissoires <benjamin.tissoires@redhat.com>,
        Linux Input <linux-input@vger.kernel.org>,
        Linux Kernel <linux-kernel@vger.kernel.org>
Cc:     Marco Rodolfi <marco.rodolfi@tuta.io>
Message-ID: <NLR9TEh--3-9@tuta.io>
Subject: [PATCH] HID: Ignore battery for Elan touchscreen on Asus TP420IA
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This device has a touchscreen thats report a battery even if it doesn't=20
have one.=20
Ask Linux to ignore the battery so it will not always report it as low.=20
=20
Signed-off-by: Marco Rodolfi <marco.rodolfi@tuta.io>=20
---=20
 drivers/hid/hid-ids.h =C2=A0=C2=A0| 1 +=20
 drivers/hid/hid-input.c | 2 ++=20
 2 files changed, 3 insertions(+)=20
=20
diff --git a/drivers/hid/hid-ids.h b/drivers/hid/hid-ids.h=20
index 8f58c3c1bec3..0f525b946cd1 100644=20
--- a/drivers/hid/hid-ids.h=20
+++ b/drivers/hid/hid-ids.h=20
@@ -413,6 +413,7 @@=20
 #define I2C_DEVICE_ID_HP_ENVY_X360_15 =C2=A00x2d05=20
 #define I2C_DEVICE_ID_HP_ENVY_X360_15T_DR100 =C2=A0=C2=A00x29CF=20
 #define I2C_DEVICE_ID_HP_SPECTRE_X360_15 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=
=A00x2817=20
+#define I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN 0x2BC8=20
 #define USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN 0x2544=20
 #define USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN =C2=A0=C2=A00x2706=20
 #define I2C_DEVICE_ID_SURFACE_GO_TOUCHSCREEN =C2=A0=C2=A00x261A=20
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c=20
index 859aeb07542e..54e2d4066d9b 100644=20
--- a/drivers/hid/hid-input.c=20
+++ b/drivers/hid/hid-input.c=20
@@ -369,6 +369,8 @@ static const struct hid_device_id hid_battery_quirks[] =
=3D {=20
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0{ HID_BLUETOOTH_DEVICE(USB_VENDO=
R_ID_LOGITECH,=20
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=
=C2=A0=C2=A0=C2=A0USB_DEVICE_ID_LOGITECH_DINOVO_EDGE_KBD),=20
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0HID_BATTERY_QUIRK_IG=
NORE },=20
+ =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0{ HID_I2C_DEVICE(USB_VENDOR_ID_ELAN, =
I2C_DEVICE_ID_ASUS_TP420IA_TOUCHSCREEN)
,=20
+ =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0HID_BATTERY_QUIRK_IGNORE =
},=20
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0{ HID_USB_DEVICE(USB_VENDOR_ID_E=
LAN, USB_DEVICE_ID_ASUS_UX550_TOUCHSCREEN),=20
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0HID_BATTERY_QUIRK_IG=
NORE },=20
 =C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0=C2=A0{ HID_USB_DEVICE(USB_VENDOR_ID_E=
LAN, USB_DEVICE_ID_ASUS_UX550VE_TOUCHSCREEN)
,=20
-- =C2=A0
2.39.0=20

=20