LM3560_FLASH_BRT_MIN
if (brt < LM3560_FLASH_BRT_MIN)
LM3560_FLASH_BRT_MIN, max_flash_brt,
((a) < LM3560_FLASH_BRT_MIN ? 0 : \
(((a) - LM3560_FLASH_BRT_MIN) / LM3560_FLASH_BRT_STEP))
((a) * LM3560_FLASH_BRT_STEP + LM3560_FLASH_BRT_MIN)