AT91_TWI_THR
writeb_relaxed(*dev->buf, dev->base + AT91_TWI_THR);
slave_config.dst_addr = (dma_addr_t)phy_addr + AT91_TWI_THR;
writeb_relaxed(value, dev->base + AT91_TWI_THR);
writeb_relaxed(value, dev->base + AT91_TWI_THR);