HW_WDMOD
iowrite32(BM_MOD_WDEN | mode, priv->iobase + HW_WDMOD);
iowrite32(BM_MOD_WDEN | BM_MOD_WDRESET, priv->iobase + HW_WDMOD);
stat = ioread32(priv->iobase + HW_WDMOD);