spi: spi-mem: Add driver for NXP FlexSPI controller (a5356aef) · Commits · 戴 / test

- Add driver for NXP FlexSPI host controller (0) What is the FlexSPI controller? FlexSPI is a flexsible SPI host controller which supports two SPI channels and up to 4 external devices. Each channel supports Single/Dual/Quad/Octal mode data transfer (1/2/4/8 bidirectional data lines) i.e. FlexSPI acts as an interface to external devices, maximum 4, each with up to 8 bidirectional data lines. It uses new SPI memory interface of the SPI framework to issue flash memory operations to up to four connected flash devices (2 buses with 2 CS each). (1) Tested this driver with the mtd_debug and JFFS2 filesystem utility on NXP LX2160ARDB and LX2160AQDS targets. LX2160ARDB is having two NOR slave device connected on single bus A i.e. A0 and A1 (CS0 and CS1). LX2160AQDS is having two NOR slave device connected on separate buses one flash on A0 and second on B1 i.e. (CS0 and CS3). Verified this driver on following SPI NOR flashes: Micron, mt35xu512ab, [Read - 1 bit mode] Cypress, s25fl512s, [Read - 1/2/4 bit mode] Signed-off-by:

Yogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com> Reviewed-by:

Frieder Schrempf <frieder.schrempf@kontron.de> Reviewed-by:

Boris Brezillon <bbrezillon@kernel.org> Tested-by:

Ashish Kumar <Ashish.Kumar@nxp.com> Signed-off-by:

Mark Brown <broonie@kernel.org>

drivers/spi/Kconfig

+10 −0

Original line number	Original line	Diff line number	Diff line
	@@ -279,6 +279,16 @@ config SPI_FSL_QUADSPI
	This controller does not support generic SPI messages. It only		This controller does not support generic SPI messages. It only
	supports the high-level SPI memory interface.		supports the high-level SPI memory interface.

			config SPI_NXP_FLEXSPI
			tristate "NXP Flex SPI controller"
			depends on ARCH_LAYERSCAPE \|\| HAS_IOMEM
			help
			This enables support for the Flex SPI controller in master mode.
			Up to four slave devices can be connected on two buses with two
			chipselects each.
			This controller does not support generic SPI messages and only
			supports the high-level SPI memory interface.

	config SPI_GPIO		config SPI_GPIO
	tristate "GPIO-based bitbanging SPI Master"		tristate "GPIO-based bitbanging SPI Master"
	depends on GPIOLIB \|\| COMPILE_TEST		depends on GPIOLIB \|\| COMPILE_TEST

drivers/spi/Makefile

+1 −0

Original line number	Original line	Diff line number	Diff line
	@@ -64,6 +64,7 @@ obj-$(CONFIG_SPI_MXIC) += spi-mxic.o
	obj-$(CONFIG_SPI_MXS) += spi-mxs.o		obj-$(CONFIG_SPI_MXS) += spi-mxs.o
	obj-$(CONFIG_SPI_NPCM_PSPI) += spi-npcm-pspi.o		obj-$(CONFIG_SPI_NPCM_PSPI) += spi-npcm-pspi.o
	obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o		obj-$(CONFIG_SPI_NUC900) += spi-nuc900.o
			obj-$(CONFIG_SPI_NXP_FLEXSPI) += spi-nxp-fspi.o
	obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o		obj-$(CONFIG_SPI_OC_TINY) += spi-oc-tiny.o
	spi-octeon-objs := spi-cavium.o spi-cavium-octeon.o		spi-octeon-objs := spi-cavium.o spi-cavium-octeon.o
	obj-$(CONFIG_SPI_OCTEON) += spi-octeon.o		obj-$(CONFIG_SPI_OCTEON) += spi-octeon.o

drivers/spi/spi-nxp-fspi.c

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+1105 −0

File added.

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