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| author | Stefan Agner | 2015-09-03 03:06:33 +0200 |
|---|---|---|
| committer | Brian Norris | 2015-09-29 22:47:58 +0200 |
| commit | 456930d80a2da129974640dc0238d5380597e172 (patch) | |
| tree | 4a6ab3e5229c0aceda1e7ffaa0d0996cf62df4d2 /MAINTAINERS | |
| parent | mtd: provide proper 32/64-bit compat_ioctl() support for BLKPG (diff) | |
| download | kernel-qcow2-linux-456930d80a2da129974640dc0238d5380597e172.tar.gz kernel-qcow2-linux-456930d80a2da129974640dc0238d5380597e172.tar.xz kernel-qcow2-linux-456930d80a2da129974640dc0238d5380597e172.zip | |
mtd: nand: vf610_nfc: Freescale NFC for VF610, MPC5125 and others
This driver supports Freescale NFC (NAND flash controller) found on
Vybrid (VF610), MPC5125, MCF54418 and Kinetis K70. The driver has
been tested using 8-bit and 16-bit NAND interface on the ARM based
Vybrid SoC VF500 and VF610 platform.
parameter page reading.
Limitations:
- Untested on MPC5125 and M54418.
- DMA and pipelining not used.
- 2K pages or less.
- No chip select, one NAND chip per controller.
- No hardware ECC.
Some paths have been hand-optimized and evaluated by measurements
made using mtd_speedtest.ko on a 100MB MTD partition.
Colibri VF50
eb write % eb read % page write % page read %
rel/opt 5175 11537 4560 11039
opt 5164 -0.21 11420 -1.01 4737 +3.88 10918 -1.10
none 5113 -1.20 11352 -1.60 4490 -1.54 10865 -1.58
Colibri VF61
eb write % eb read % page write % page read %
rel/opt 5766 13096 5459 12846
opt 5883 +2.03 13064 -0.24 5561 +1.87 12802 -0.34
none 5701 -1.13 12980 -0.89 5488 +0.53 12735 -0.86
rel = using readl_relaxed/writel_relaxed in optimized paths
opt = hand-optimized by combining multiple accesses into one read/write
The measurements have not been statistically verfied, hence use them
with care. The author came to the conclusion that using the relaxed
variants of readl/writel are not worth the additional code.
Signed-off-by: Bill Pringlemeir <bpringlemeir@nbsps.com>
Tested-by: Albert ARIBAUD <albert.aribaud@3adev.fr>
Signed-off-by: Stefan Agner <stefan@agner.ch>
Reviewed-by: Alexey Klimov <klimov.linux@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Diffstat (limited to 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 7ba7ab749c85..41e1e2b3c5fc 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11056,6 +11056,12 @@ S: Maintained F: Documentation/fb/uvesafb.txt F: drivers/video/fbdev/uvesafb.* +VF610 NAND DRIVER +M: Stefan Agner <stefan@agner.ch> +L: linux-mtd@lists.infradead.org +S: Supported +F: drivers/mtd/nand/vf610_nfc.c + VFAT/FAT/MSDOS FILESYSTEM M: OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> S: Maintained |