DW_SPI_TXFLR
tx_room = dws->fifo_len - dw_readl(dws, DW_SPI_TXFLR);
DW_SPI_DBGFS_REG("TXFLR", DW_SPI_TXFLR),
entries = readl_relaxed(dws->regs + DW_SPI_TXFLR);
nents = dw_readl(dws, DW_SPI_TXFLR);
nents = dw_readl(dws, DW_SPI_TXFLR);