drivers/spi/spi-pl022.c

800 	struct dma_slave_config rx_conf = {
830 		rx_conf.src_maxburst = 1;
833 		rx_conf.src_maxburst = 4;
836 		rx_conf.src_maxburst = 8;
839 		rx_conf.src_maxburst = 16;
842 		rx_conf.src_maxburst = 32;
845 		rx_conf.src_maxburst = pl022->vendor->fifodepth >> 1;
873 		rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_UNDEFINED;
876 		rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_1_BYTE;
879 		rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
882 		rx_conf.src_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
903 	if (rx_conf.src_addr_width == DMA_SLAVE_BUSWIDTH_UNDEFINED)
904 		rx_conf.src_addr_width = tx_conf.dst_addr_width;
906 		tx_conf.dst_addr_width = rx_conf.src_addr_width;
907 	BUG_ON(rx_conf.src_addr_width != tx_conf.dst_addr_width);
909 	dmaengine_slave_config(rxchan, &rx_conf);