[PATCH] HID: input: Increase maximum number of joystick buttons
From: Ivan Gorinov
Date: Sat Dec 20 2025 - 14:49:49 EST
This patch increases the limit from 80 to 112 key codes.
If a joystick has 80 or fewer buttons, mapping stays the same.
If a joystick has more than 80 buttons:
Map buttons [ 0 .. 15 ] to key codes starting with BTN_JOYSTICK;
Map buttons [ 16 .. 47 ] to key codes starting with KEY_MACRO1;
Map buttons [ 48 .. 111 ] to key codes starting with BTN_TRIGGER_HAPPY.
Signed-off-by: Ivan Gorinov <linux-kernel@xxxxxxxxxxxxxx>
---
drivers/hid/hid-input.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index 2633fcd8f910..c6159f96de04 100644
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -763,7 +763,13 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
if (code <= 0xf)
code += BTN_JOYSTICK;
else
- code += BTN_TRIGGER_HAPPY - 0x10;
+ if (field->maxusage <= 80)
+ code += BTN_TRIGGER_HAPPY - 0x10;
+ else
+ if (code <= 0x2f)
+ code += KEY_MACRO1 - 0x10;
+ else
+ code += BTN_TRIGGER_HAPPY - 0x30;
break;
case HID_GD_GAMEPAD:
if (code <= 0xf)
--
2.43.0