qmk_firmware/keyboards/mt/mt84/config.h

// Copyright 2020 MaiKong<704340378@qq.com>
// SPDX-License-Identifier: GPL-2.0+
 
#pragma once

#define IS31FL3737_I2C_ADDRESS_1 IS31FL3737_I2C_ADDRESS_GND
#define IS31FL3737_I2C_ADDRESS_2 IS31FL3737_I2C_ADDRESS_VCC

/* Mechanical locking support. Use KC_LCAP, KC_LNUM or KC_LSCR instead in keymap */
#define LOCKING_SUPPORT_ENABLE
/* Locking resynchronize hack */
#define LOCKING_RESYNC_ENABLE