LM3560_FLASH_BRT_STEP
LM3560_FLASH_BRT_STEP, max_flash_brt);
(((a) - LM3560_FLASH_BRT_MIN) / LM3560_FLASH_BRT_STEP))
((a) * LM3560_FLASH_BRT_STEP + LM3560_FLASH_BRT_MIN)