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SubjectRe: [PATCH v2 0/7] spi: add support for octal mode
+Mark

Hi Yogesh,

On Mon, 15 Oct 2018 12:13:57 +0000
Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> wrote:

> Add support for octal mode IO data transfer.
> Micron flash, mt35xu512aba, supports octal mode data transfer and
> NXP FlexSPI controller supports 8 data lines for data transfer (Rx/Tx).
>
> Patch series
> * Add support for octal mode flags and parsing of same in spi driver.
> * Add parsing logic for spi-mem framework and m25p80.c device file.
> * Add opcodes for octal I/O commands in spi-nor framework, Read and Write proto for (1-1-8/1-8-8) mode.
> Opcodes are added as per octal data IO commands required for mt35xu512aba [1] flash.
> * Add mode bit required for octal mode in nxp-fspi driver [2].
> * Define binding property 'spi-rx/tx-bus-width' for LX2160ARDB target [2].
>
> Cherry pick below 2 patches (from: https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi.git):
> c639f871febe6667d9afce28108c634e5636c735 spi: spi-mem: Fix inverted logic in op sanity check
> db122eb8a749a1eff038f9a282c620ab16c4be1d spi: spi-mem: Add extra sanity checks on the op param
>
> Tested on LX2160ARDB target with nxp-fspi driver, below are
> Read performance number of 1-1-1 and 1-1-8 read protocol.
>
> root@lxxx:~# cat /proc/mtd
> dev: size erasesize name
> mtd0: 04000000 00001000 "spi0.0"
> mtd1: 04000000 00001000 "spi0.1"
> root@lxxx:~# time mtd_debug read /dev/mtd0 0x0 0x1000000 0read
> Copied 16777216 bytes from address 0x00000000 in flash to 0read
>
> real 0m2.792s
> user 0m0.000s
> sys 0m2.790s
> root@lxxx:~# time mtd_debug read /dev/mtd1 0x0 0x1000000 0read
> Copied 16777216 bytes from address 0x00000000 in flash to 0read
>
> real 0m0.441s
> user 0m0.000s
> sys 0m0.440s
> root@ls1012ardb:~#
>
> Flash device MTD0 configured in 1-1-1 protocol.
> Flash device MTD1 configured in 1-1-8 protocol.
>
> [1] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=70384
> [2] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=70210
>
> Yogesh Gaur (7):
> spi: add support for octal I/O data transfer

I guess you've followed the discussion with Mark on the "mtd: spi-nor:
Proposal for 8-8-8 mode support" series. Can you please send a new
version of this patchset after adding patching spi_setup() to support
octal mode?

Thanks,

Boris

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