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 spi: spi-mem: add support for octal I/O data transfer mtd: spi-nor: add opcodes for octal Read/Write commands mtd: spi-nor: add octal read flag for flash mt35xu512aba mtd: m25p80: add support of octal I/O transfer spi: nxp-fspi: add mode flag bit for octal support arm64: dts: lx2160a: update fspi node 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 | 6 ++++++ include/linux/mtd/spi-nor.h | 8 ++++++++ include/linux/spi/spi.h | 2 ++ 8 files changed, 52 insertions(+), 5 deletions(-) -- 2.7.4
