iicbus_request_bus
error = iicbus_request_bus(device_get_parent(iicdev), iicdev,
error = iicbus_request_bus(device_get_parent(iicdev), iicdev,
if ((error = iicbus_request_bus(device_get_parent(iicdev), iicdev,
extern int iicbus_request_bus(device_t, device_t, int);
error = iicbus_request_bus(parent, dev, how);
if ((error = iicbus_request_bus(parent, icdev, IIC_WAIT|IIC_INTR)))