RIC0
u32 ric0 = ravb_read(ndev, RIC0);
ravb_write(ndev, ric0 & ~BIT(q), RIC0);
ravb_modify(ndev, RIC0, mask, mask);
ravb_write(ndev, 0, RIC0);
ravb_write(ndev, 0, RIC0);
ravb_write(ndev, RIC0_FRE0, RIC0);
ravb_write(ndev, RIC0_FRE0 | RIC0_FRE1, RIC0);