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]. 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&state=* [2] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=76402 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 v4: - Rebase on top of v4.20-rc2. - Modify octo entries enum value in spi.h. 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 | 4 +++- 8 files changed, 57 insertions(+), 8 deletions(-) -- 2.7.4
