ROCKCHIP_SPI_RXDR
u32 rxw = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR);
readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR);
u32 rxw = readl_relaxed(rs->regs + ROCKCHIP_SPI_RXDR);
rs->dma_addr_rx = mem->start + ROCKCHIP_SPI_RXDR;