ac178a2175
In the i.MX28 manual (MCIMX28RM, Rev. 1, 2010) you can find an example (15.2.4 High-Speed NAND Timing) of how to configure the GPMI controller to manage High-Speed NAND devices, so it was wrong to assume that only i.MX6 can achieve EDO timings. This patch has been tested on a 2048/64 byte NAND (Micron MT29F2G08ABAEAH4). Kernel mtd tests: - mtd_nandbiterrs - mtd_nandecctest - mtd_oobtest - mtd_pagetest - mtd_readtest - mtd_speedtest - mtd_stresstest - mtd_subpagetest - mtd_torturetest [cycles_count = 10000000] run without errors. Before this patch (mode 0): --------------------------- eraseblock write speed is 2098 KiB/s eraseblock read speed is 2680 KiB/s page write speed is 1689 KiB/s page read speed is 2522 KiB/s 2 page write speed is 1899 KiB/s 2 page read speed is 2579 KiB/s erase speed is 128000 KiB/s 2x multi-block erase speed is 73142 KiB/s 4x multi-block erase speed is 204800 KiB/s 8x multi-block erase speed is 256000 KiB/s 16x multi-block erase speed is 256000 KiB/s 32x multi-block erase speed is 256000 KiB/s 64x multi-block erase speed is 256000 KiB/s After this patch (mode 5): ------------------------- eraseblock write speed is 3390 KiB/s eraseblock read speed is 5688 KiB/s page write speed is 2680 KiB/s page read speed is 4876 KiB/s 2 page write speed is 2909 KiB/s 2 page read speed is 5224 KiB/s erase speed is 170666 KiB/s 2x multi-block erase speed is 204800 KiB/s 4x multi-block erase speed is 256000 KiB/s 8x multi-block erase speed is 256000 KiB/s 16x multi-block erase speed is 256000 KiB/s 32x multi-block erase speed is 256000 KiB/s 64x multi-block erase speed is 256000 KiB/s Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com> Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com> Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com> Tested-by: Sascha Hauer <s.hauer@pengutronix.de> Reviewed-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> Link: https://lore.kernel.org/linux-mtd/20220118095434.35081-5-dario.binacchi@amarulasolutions.com |
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| .. | ||
| onenand | ||
| raw | ||
| spi | ||
| bbt.c | ||
| core.c | ||
| ecc-sw-bch.c | ||
| ecc-sw-hamming.c | ||
| ecc.c | ||
| Kconfig | ||
| Makefile | ||