#if defined(USE_I2C) || defined(EH)
// When using I2C, using rgblight implicitly involves split support.
#if defined(RGBLIGHT_ENABLE) && !defined(RGBLIGHT_SPLIT)
#define RGBLIGHT_SPLIT
#endif
#ifndef F_SCL
#define F_SCL 100000UL // SCL frequency
#else // use serial
// When using serial, the user must define RGBLIGHT_SPLIT explicitly
// in config.h as needed.
// see quantum/rgblight_post_config.h
#if defined(RGBLIGHT_ENABLE) && defined(RGBLIGHT_SPLIT)
// When using serial and RGBLIGHT_SPLIT need separate transaction
#define SERIAL_USE_MULTI_TRANSACTION