From: Ivan Gorinov <linux-kernel@altimeter.info>
To: Jiri Kosina <jikos@kernel.org>
Cc: linux-input@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH] HID: input: Increase maximum number of joystick buttons
Date: Sat, 20 Dec 2025 19:41:00 +0000 [thread overview]
Message-ID: <20251220194100.GA12646@altimeter-info> (raw)
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@altimeter.info>
---
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
reply other threads:[~2025-12-20 19:49 UTC|newest]
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