SPRD_SPI_TXD
writeb_relaxed(tx_p[i], ss->base + SPRD_SPI_TXD);
writew_relaxed(tx_p[i], ss->base + SPRD_SPI_TXD);
writel_relaxed(tx_p[i], ss->base + SPRD_SPI_TXD);
rx_p[i] = readb_relaxed(ss->base + SPRD_SPI_TXD);
rx_p[i] = readw_relaxed(ss->base + SPRD_SPI_TXD);
rx_p[i] = readl_relaxed(ss->base + SPRD_SPI_TXD);