This patch set adds NAND Flash Controller (NFC) support for Freescale Vybrid ARM SoCs (vf610).
The driver is based on Bill Pringlemeirs prelineary patch sent in January 2014 to the MTD mailing list: http://lists.infradead.org/pipermail/linux-arm-kernel/2014-January/226623.html Changes in v3 - Further optimizations in vf610_nfc_send_command(s) to avoid performance hit by additional barriers introduced through using writel/readl - Removed unnecessary barrier and added comment - Use void __iomem * as memory base data type - Set page to -1 on read error to allow reread of pages by the higher layers - Minor style fixes Changes in v2: - Renamed the driver from fsl_nfc to vf610_nfc - Use writel/readl in register access functions - Optimized some register accesses by read/write value only once in code - Use CONFIG_SYS_NAND_SELF_INIT and fix board_nand_init implementation - Removed uncommented code/fixed comments - Add CONFIG_USE_ARCH_MEMCPY for improved NAND performance - Use hweight32 for improved count_written_bits performance - Implement page_read/page_write rather than reuse MTD stacks version Due to the duplicated initialization (missing SELF_INIT), page size was actually set to 0 which lead count_written_bits to not count the amount of written bits at all. Performance numbers: V1 => optimized count_written_bits Read empty pages: 0.8MiB/s => 1.4MiB/s V1 => optimized memcpy => optimized page_read/page_write => V3 Read full pages: 3.6MiB/s => 7MiB/s => 10.3MiB/s => 11.3MiB/s Stefan Agner (4): arm: vf610: add NFC pin mux arm: vf610: add NFC clock support mtd: nand: add Freescale vf610_nfc driver arm: vf610: add NAND support for vf610twr arch/arm/include/asm/arch-vf610/crm_regs.h | 14 + arch/arm/include/asm/arch-vf610/imx-regs.h | 1 + arch/arm/include/asm/arch-vf610/iomux-vf610.h | 34 ++ arch/arm/include/asm/imx-common/iomux-v3.h | 4 + board/freescale/vf610twr/vf610twr.c | 47 +- configs/vf610twr_defconfig | 2 +- configs/vf610twr_nand_defconfig | 3 + drivers/mtd/nand/Makefile | 1 + drivers/mtd/nand/vf610_nfc.c | 714 ++++++++++++++++++++++++++ include/configs/vf610twr.h | 46 +- 10 files changed, 861 insertions(+), 5 deletions(-) create mode 100644 configs/vf610twr_nand_defconfig create mode 100644 drivers/mtd/nand/vf610_nfc.c -- 2.0.4 _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
