RIIC_ICCR2
ret = readb_poll_timeout(riic->base + riic->info->regs[RIIC_ICCR2], val,
riic_writeb(riic, start_bit, RIIC_ICCR2);
riic_writeb(riic, ICCR2_SP, RIIC_ICCR2);
riic_writeb(riic, ICCR2_SP, RIIC_ICCR2);
[RIIC_ICCR2] = 0x04,
[RIIC_ICCR2] = 0x01,