BT_CTRL_H2B_ATN
bt_inb(bt_bmc, BT_CTRL) & BT_CTRL_H2B_ATN))
if (unlikely(!(bt_inb(bt_bmc, BT_CTRL) & BT_CTRL_H2B_ATN))) {
if (ctrl & BT_CTRL_H2B_ATN)
bt_outb(bt_bmc, BT_CTRL_H2B_ATN, BT_CTRL);