[PATCH 2/6] HID: uclogic: Add battery quirk

From: José Expósito
Date: Mon Dec 26 2022 - 07:55:24 EST


Some UGEE v2 tablets have a wireless version with an internal battery
and their firmware is able to report their battery level.

However, there was not found a field on their descriptor indicating
whether the tablet has battery or not, making it mandatory to classify
such devices through the UCLOGIC_BATTERY_QUIRK quirk.

Tested-by: Mia Kanashi <chad@xxxxxxxxxxxxx>
Tested-by: Andreas Grosse <andig.mail@xxxxxxxxxxx>
Signed-off-by: José Expósito <jose.exposito89@xxxxxxxxx>
---
drivers/hid/hid-uclogic-params.c | 5 +++++
drivers/hid/hid-uclogic-params.h | 1 +
2 files changed, 6 insertions(+)

diff --git a/drivers/hid/hid-uclogic-params.c b/drivers/hid/hid-uclogic-params.c
index 2d46d4d50604..37cf4a93eafa 100644
--- a/drivers/hid/hid-uclogic-params.c
+++ b/drivers/hid/hid-uclogic-params.c
@@ -1222,6 +1222,11 @@ static int uclogic_params_ugee_v2_init_frame_mouse(struct uclogic_params *p)
*/
static bool uclogic_params_ugee_v2_has_battery(struct hid_device *hdev)
{
+ struct uclogic_drvdata *drvdata = hid_get_drvdata(hdev);
+
+ if (drvdata->quirks & UCLOGIC_BATTERY_QUIRK)
+ return true;
+
/* The XP-PEN Deco LW vendor, product and version are identical to the
* Deco L. The only difference reported by their firmware is the product
* name. Add a quirk to support battery reporting on the wireless
diff --git a/drivers/hid/hid-uclogic-params.h b/drivers/hid/hid-uclogic-params.h
index 10a05c7fd939..b0e7f3807939 100644
--- a/drivers/hid/hid-uclogic-params.h
+++ b/drivers/hid/hid-uclogic-params.h
@@ -20,6 +20,7 @@
#include <linux/hid.h>

#define UCLOGIC_MOUSE_FRAME_QUIRK BIT(0)
+#define UCLOGIC_BATTERY_QUIRK BIT(1)

/* Types of pen in-range reporting */
enum uclogic_params_pen_inrange {
--
2.38.1