MPC52xx_GPT_MODE_MS_MASK
if ((mode & MPC52xx_GPT_MODE_MS_MASK) == 0)
clrsetbits_be32(&gpt->regs->mode, MPC52xx_GPT_MODE_MS_MASK,
clear = MPC52xx_GPT_MODE_MS_MASK | MPC52xx_GPT_MODE_CONTINUOUS;