(0) This patch set depends on the patch: http://lists.infradead.org/pipermail/linux-mtd/2014-April/053308.html (1) This patch set tries to add the DDR quad read support for the SPI NOR framework, and it also adds the DDR quad read support for FREESCALE quadspi controller driver. (2) Test this patch set with Spansion s25fl128s, the performance with mtd_speedtest.ko: ================================================= mtd_speedtest: MTD device: 0 mtd_speedtest: not NAND flash, assume page size is 512 bytes. mtd_speedtest: MTD device size 16777216, eraseblock size 65536, page size 512, count of eraseblocks 256, pages per eraseblock 128, OOB size 0 mtd_speedtest: testing eraseblock write speed mtd_speedtest: eraseblock write speed is 665 KiB/s mtd_speedtest: testing eraseblock read speed mtd_speedtest: eraseblock read speed is 49799 KiB/s mtd_speedtest: testing page write speed mtd_speedtest: page write speed is 662 KiB/s mtd_speedtest: testing page read speed mtd_speedtest: page read speed is 24236 KiB/s mtd_speedtest: testing 2 page write speed mtd_speedtest: 2 page write speed is 657 KiB/s mtd_speedtest: testing 2 page read speed mtd_speedtest: 2 page read speed is 32637 KiB/s mtd_speedtest: Testing erase speed mtd_speedtest: erase speed is 518 KiB/s mtd_speedtest: Testing 2x multi-block erase speed mtd_speedtest: 2x multi-block erase speed is 506 KiB/s mtd_speedtest: Testing 4x multi-block erase speed mtd_speedtest: 4x multi-block erase speed is 503 KiB/s mtd_speedtest: Testing 8x multi-block erase speed mtd_speedtest: 8x multi-block erase speed is 501 KiB/s mtd_speedtest: Testing 16x multi-block erase speed mtd_speedtest: 16x multi-block erase speed is 498 KiB/s mtd_speedtest: Testing 32x multi-block erase speed mtd_speedtest: 32x multi-block erase speed is 496 KiB/s mtd_speedtest: Testing 64x multi-block erase speed mtd_speedtest: 64x multi-block erase speed is 495 KiB/s mtd_speedtest: finished ================================================= (3) Conclusion: The DDR quad read could be 49799 KiB/s. Changlog: About this patch set: For patch 1, please see the old discusstion: http://lists.infradead.org/pipermail/linux-mtd/2014-April/053370.html For patch 2, please see the old discusstion: http://lists.infradead.org/pipermail/linux-mtd/2014-April/053374.html Huang Shijie (7): mtd: spi-nor: fix the wrong dummy value mtd: spi-nor: add DDR quad read support Documentation: mtd: add a new document for SPI NOR flash Documentation: fsl-quadspi: update the document mtd: fsl-quadspi: get the dummy cycles for DDR Quad read from the DT property mtd: fsl-quadspi: use the information stored in spi-nor{} mtd: fsl-quadspi: add the DDR quad read support .../devicetree/bindings/mtd/fsl-quadspi.txt | 16 +++ .../devicetree/bindings/mtd/spi-nor-flash.txt | 7 + drivers/mtd/devices/m25p80.c | 5 +- drivers/mtd/spi-nor/fsl-quadspi.c | 121 +++++++++++++------- drivers/mtd/spi-nor/spi-nor.c | 52 ++++++++- include/linux/mtd/spi-nor.h | 8 +- 6 files changed, 162 insertions(+), 47 deletions(-) create mode 100644 Documentation/devicetree/bindings/mtd/spi-nor-flash.txt -- 1.7.2.rc3 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
