keychron_qmk_firmware/keyboards/tzarc/ghoul/config.h

// Copyright 2018-2022 Nick Brassel (@tzarc)
// SPDX-License-Identifier: GPL-3.0-or-later
#pragma once

// Matrix
#define MATRIX_SHIFT_REGISTER_COUNT 5
// #define MATRIX_ROWS 6 // actually defined in info.json: 5 shift registers, plus one row for extras (i.e. encoder pushbutton read)
// #define MATRIX_COLS 8 // actually defined in info.json: 8 bits per register

// EEPROM configuration
#define EEPROM_SPI_MB85RS64V