Hi Yogesh On 23/10/18 3:07 PM, Yogesh Narayan Gaur wrote: > Add support for octo 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 octo mode flags and parsing of same in spi driver. > * Add parsing logic for spi-mem framework and m25p80.c device file. > * Add opcodes for octo 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 octo mode in nxp-fspi driver [2]. > * Define binding property 'spi-rx/tx-bus-width' for LX2160ARDB target [2]. > You may have to rebase this series to avoid conflicts with recent spi.h changes. Also, I suggest merging patches in [1] with this series if you plan to post another version so that all bits are at one place. Regards Vignesh > 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=72181 > > Yogesh Gaur (7): > spi: add support for octo mode I/O data transfer > spi: spi-mem: add support for octo mode I/O data transfer > mtd: spi-nor: add opcodes for octo Read/Write commands > mtd: spi-nor: add octo read flag for flash mt35xu512aba > mtd: m25p80: add support of octo mode I/O transfer > spi: nxp-fspi: add octo mode flag bit for octal support > arm64: dts: lx2160a: update fspi node > > Changes for v3: > - Add octo mode support in spi_setup(). > - Rename all patches with 'octal' string modified as 'octo'. > Changes for v2: > - Incorporated review comments of Boris and Vignesh. > > arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 4 ++++ > drivers/mtd/devices/m25p80.c | 9 ++++++++- > drivers/mtd/spi-nor/spi-nor.c | 15 ++++++++++++++- > drivers/spi/spi-mem.c | 9 ++++++++- > drivers/spi/spi-nxp-fspi.c | 4 ++-- > drivers/spi/spi.c | 12 ++++++++++-- > include/linux/mtd/spi-nor.h | 8 ++++++++ > include/linux/spi/spi.h | 2 ++ > 8 files changed, 56 insertions(+), 7 deletions(-) > -- Regards Vignesh
