From: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
To: linux-mtd@lists.infradead.org, boris.brezillon@bootlin.com,
marek.vasut@gmail.com, vigneshr@ti.com,
linux-spi@vger.kernel.org, devicetree@vger.kernel.org
Cc: robh@kernel.org, mark.rutland@arm.com, shawnguo@kernel.org,
linux-arm-kernel@lists.infradead.org,
computersforpeace@gmail.com, frieder.schrempf@exceet.de,
linux-kernel@vger.kernel.org,
Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Subject: [PATCH 0/4] spi: add support for octal mode data transfer
Date: Thu, 4 Oct 2018 14:18:36 +0530 [thread overview]
Message-ID: <1538642920-3843-1-git-send-email-yogeshnarayan.gaur@nxp.com> (raw)
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 octal data communication commands required for mt35xu512aba [1] flash.
* Add support for Read and Write proto for (1-1-8/1-8-8) mode.
* Add mode bit required for octal 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=66317
[2] https://patchwork.ozlabs.org/project/linux-mtd/list/?series=66887
Yogesh Gaur (4):
spi: add support for octal I/O data transfer
mtd: spi-nor: add support for octal mode data transfer
spi: nxp-fspi: add mode flag bit for octal support
arm64: dts: lx2160a: update fspi node
arch/arm64/boot/dts/freescale/fsl-lx2160a-rdb.dts | 4 ++++
drivers/mtd/devices/m25p80.c | 9 ++++++++-
drivers/mtd/spi-nor/spi-nor.c | 14 +++++++++++++-
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 ++
7 files changed, 43 insertions(+), 4 deletions(-)
--
2.7.4
next reply other threads:[~2018-10-04 8:48 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-10-04 8:48 Yogesh Gaur [this message]
2018-10-04 8:48 ` [PATCH 1/4] spi: add support for octal I/O data transfer Yogesh Gaur
2018-10-04 9:04 ` Boris Brezillon
2018-10-04 9:14 ` Yogesh Narayan Gaur
2018-10-04 9:19 ` Boris Brezillon
2018-10-04 9:25 ` Yogesh Narayan Gaur
2018-10-04 12:07 ` Yogesh Narayan Gaur
2018-10-04 12:12 ` Boris Brezillon
2018-10-04 8:48 ` [PATCH 2/4] mtd: spi-nor: add support for octal mode " Yogesh Gaur
2018-10-04 9:14 ` Boris Brezillon
2018-10-04 8:48 ` [PATCH 3/4] spi: nxp-fspi: add mode flag bit for octal support Yogesh Gaur
2018-10-04 8:48 ` [PATCH 4/4] arm64: dts: lx2160a: update fspi node Yogesh Gaur
2018-10-04 9:18 ` Boris Brezillon
2018-10-04 9:24 ` Yogesh Narayan Gaur
2018-10-04 9:26 ` Boris Brezillon
2018-10-04 9:27 ` Yogesh Narayan Gaur
2018-10-04 9:22 ` [PATCH 0/4] spi: add support for octal mode data transfer Vignesh R
2018-10-04 9:28 ` Yogesh Narayan Gaur
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