recv_control_msg
static int recv_control_msg(struct au0828_dev *dev, u16 request, u32 value,
recv_control_msg(dev, CMD_REQUEST_IN, 0, reg, &result, 1);
ret = recv_control_msg(pdev, request, value, 1);
ret = recv_control_msg(pdev, request, value, 1);
ret = recv_control_msg(pdev, request, value, 2);
ret = recv_control_msg(pdev, GET_STATUS_CTL, request, 1);