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This driver is derived from the SPI NOR driver at
mtd/spi-nor/fsl-quadspi.c. It uses the new SPI memory interface
of the SPI framework to issue flash memory operations to up to
four connected flash chips (2 buses with 2 CS each).
The controller does not support generic SPI messages.
This patch also disables the build of the "old" driver and reuses
its Kconfig option CONFIG_SPI_FSL_QUADSPI to replace it.
Signed-off-by: Frieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: Han Xu <han.xu@nxp.com>
Reviewed-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Tested-by: Yogesh Gaur <yogeshnarayan.gaur@nxp.com>
Tested-by: Han Xu <han.xu@nxp.com>
Reviewed-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
I ran into a link-time error with the atmel-quadspi driver on the
EBSA110 platform:
drivers/mtd/built-in.o: In function `atmel_qspi_run_command':
:(.text+0x1ee3c): undefined reference to `_memcpy_toio'
:(.text+0x1ee48): undefined reference to `_memcpy_fromio'
The problem is that _memcpy_toio/_memcpy_fromio are not available on
that platform, and we have to prevent building the driver there.
In case we want to backport this to older kernels: between linux-4.8
and linux-4.20, the Kconfig entry was in drivers/mtd/spi-nor/Kconfig
but had the same problem.
Link: https://lore.kernel.org/patchwork/patch/812860/
Fixes: 161aaab8a0 ("mtd: atmel-quadspi: add driver for Atmel QSPI controller")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
Enable McSPI driver to be built for K3 platforms, to support McSPI on
AM654 SoC of K3 family.
Signed-off-by: Vignesh R <vigneshr@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Kernel contains QSPI driver strongly tied to MTD and nor-flash memory.
New spi-mem interface allows usage also other memory types, especially
much larger NAND with SPI interface. This driver works as SPI controller
and is not related to MTD, however can work with NAND-flash or other
peripherals using spi-mem interface.
Suggested-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Piotr Bugalski <bugalski.piotr@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add a driver for Macronix SPI controller IP.
Signed-off-by: Mason Yang <masonccyang@mxic.com.tw>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
ARM-based 63xx DSL platforms have the spi-bcm63xx-hsspi controller
present, allow using this driver there as well.
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The qspi controller is a specialized communication interface
targeting single, dual or quad SPI Flash memories (NOR/NAND).
It can operate in any of the following modes:
-indirect mode: all the operations are performed using the quadspi
registers
-read memory-mapped mode: the external Flash memory is mapped to the
microcontroller address space and is seen by the system as if it was
an internal memory
tested on:
-NOR: mx66l51235l
-NAND: MT29F2G01ABAGD
Signed-off-by: Ludovic Barre <ludovic.barre@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This driver supports GENI based SPI Controller in the Qualcomm SOCs. The
Qualcomm Generic Interface (GENI) is a programmable module supporting a
wide range of serial interfaces including SPI. This driver supports SPI
operations using FIFO mode of transfer.
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>
Signed-off-by: Dilip Kota <dkota@codeaurora.org>
Signed-off-by: Alok Chauhan <alokc@codeaurora.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Tested-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
New driver for Qualcomm QuadSPI(QSPI) controller that is used to
communicate with slaves such as flash memory devices. The QSPI controller
can operate in 2 or 4 wire mode but only supports SPI Mode 0. The
controller can also operate in Single or Dual data rate modes.
Signed-off-by: Girish Mahadevan <girishm@codeaurora.org>
Signed-off-by: Ryan Case <ryandcase@chromium.org>
Reviewed-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Stephen Boyd <swboyd@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This is the driver for at91-usart in spi mode. The USART IP can be configured
to work in many modes and one of them is SPI.
The driver was tested on sama5d3-xplained and sama5d4-xplained boards with
enc28j60 ethernet controller as slave.
Signed-off-by: Radu Pirea <radu.pirea@microchip.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Reviwed-by: Mark Brown <broonie@kernel.org>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
This patch adds the SPI controller driver for Spreadtrum SC9860 platform.
Signed-off-by: Lanqing Liu <lanqing.liu@spreadtrum.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add SPI controller driver implemented in Socionext UniPhier SoCs.
UniPhier SoCs have two types SPI controllers; SCSSI supports a
single channel, and MCSSI supports multiple channels.
This driver supports SCSSI only.
This controller has 32bit TX/RX FIFO with depth of eight entry,
and supports the SPI master mode only.
This commit is implemented in PIO transfer mode, not DMA transfer.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: Keiji Hayashibara <hayashibara.keiji@socionext.com>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The correct form is "a high-level", so fix it accordingly.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Some controllers are exposing high-level interfaces to access various
kind of SPI memories. Unfortunately they do not fit in the current
spi_controller model and usually have drivers placed in
drivers/mtd/spi-nor which are only supporting SPI NORs and not SPI
memories in general.
This is an attempt at defining a SPI memory interface which works for
all kinds of SPI memories (NORs, NANDs, SRAMs).
Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: Frieder Schrempf <frieder.schrempf@exceet.de>
Tested-by: Frieder Schrempf <frieder.schrempf@exceet.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
I accidentally sent an early version of patch removing spi-bcm53xx
driver which got rid of .c and .h files *only*. I amended local commit
but forgot to re-format the patch.
This commit removes leftovers of dropped driver.
Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
Signed-off-by: Mark Brown <broonie@kernel.org>
Remove dependencies on HAS_DMA where a Kconfig symbol depends on another
symbol that implies HAS_DMA, and, optionally, on "|| COMPILE_TEST".
In most cases this other symbol is an architecture or platform specific
symbol, or PCI.
Generic symbols and drivers without platform dependencies keep their
dependencies on HAS_DMA, to prevent compiling subsystems or drivers that
cannot work anyway.
This simplifies the dependencies, and allows to improve compile-testing.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Acked-by: Robin Murphy <robin.murphy@arm.com>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The blackfin architecture is getting removed, so these
won't be needed any more.
Acked-by: Mark Brown <broonie@kernel.org>
Acked-by: Aaron Wu <aaron.wu@analog.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
A lot of Kconfig symbols have architecture specific dependencies.
In those cases that depend on architectures we have already removed,
they can be omitted.
Acked-by: Kalle Valo <kvalo@codeaurora.org>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
With CONFIG_HWSPINLOCK=m, the new driver fails to link as a built-in driver:
drivers/spi/spi-sprd-adi.o: In function `sprd_adi_remove':
spi-sprd-adi.c:(.text+0x18): undefined reference to `hwspin_lock_free'
drivers/spi/spi-sprd-adi.o: In function `sprd_adi_probe':
spi-sprd-adi.c:(.text+0xfc): undefined reference to `of_hwspin_lock_get_id'
spi-sprd-adi.c:(.text+0x108): undefined reference to `hwspin_lock_request_specific'
spi-sprd-adi.c:(.text+0x268): undefined reference to `hwspin_lock_free'
This adds a hard Kconfig dependency on HWSPINLOCK for the !COMPILE_TEST
case, and allows compile-testing with HWSPINLOCK completely disabled,
which will then rely on the existing stub API.
Fixes: 7e2903cb91 ("spi: Add ADI driver for Spreadtrum platform")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Since commit 6c364062bf ("spi: core: Add support for registering SPI
slave controllers") SPI slave is also supported, so remove the old
comments that say SPI slave is unsupported.
Signed-off-by: Fabio Estevam <fabio.estevam@nxp.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch adds ADI driver based on SPI framework for
Spreadtrum SC9860 platform.
Signed-off-by: Baolin Wang <baolin.wang@spreadtrum.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The Altera SPI driver currently uses the spi-bitbang infrastructure for
transfer queue management, but non of the bitbang functionality itself.
This is because when the driver was written this was the only way to not
have to do queue management in the driver itself.
Nowadays transfer queue management is available from the SPI driver core
itself and using the bitbang infrastructure just adds an additional level
of indirection.
Switch the driver over to using the core queue management directly.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
When the audio driver selects CONFIG_PXA_SSP on ARCH_MMP as a
loadable module, and the PXA SPI driver is built-in, we get
a link error in the SPI driver:
drivers/spi/spi-pxa2xx.o: In function `pxa2xx_spi_remove':
spi-pxa2xx.c:(.text+0x5f0): undefined reference to `pxa_ssp_free'
drivers/spi/spi-pxa2xx.o: In function `pxa2xx_spi_probe':
spi-pxa2xx.c:(.text+0xeac): undefined reference to `pxa_ssp_request'
spi-pxa2xx.c:(.text+0x1468): undefined reference to `pxa_ssp_free'
spi-pxa2xx.c:(.text+0x15bc): undefined reference to `pxa_ssp_free'
The problem is that the PXA SPI driver only uses 'select SSP'
specifically when building it for PXA, but we can also build it
for PCI, which is meant for Intel x86 SoCs that use the same SPI
block. When the sound driver forces the SSP to be a loadable
module, the IS_ENABLED() check in include/linux/pxa2xx_ssp.h
triggers but the spi driver can't reference the exported symbols.
I had a different approach before, making the PCI case depend
on X86, which fixed the problem by avoiding the MMP case.
This goes a different route, making the driver select PXA_SSP
also on MMP, which has an SSP that none of the boards in mainline
Linux use for SPI. There is no harm in always enabling the build
on MMP (PCI or not PCI), so I do that too, to document that this
hardware is actually available on MMP.
Link: https://patchwork.kernel.org/patch/8879921/
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
The STM32 Serial Peripheral Interface (SPI) can be used to communicate
with external devices while using the specific synchronous protocol. It
supports a half-duplex, full-duplex and simplex synchronous, serial
communication with external devices with 4-bit to 16/32-bit per word. It
has two 8x/16x 8-bit embedded Rx and TxFIFOs with DMA capability. It can
operate in master or slave mode.
Signed-off-by: Amelie Delaunay <amelie.delaunay@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add an example SPI slave handler to allow remote control of system
reboot, power off, halt, and suspend.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add an example SPI slave handler responding with the uptime at the time
of reception of the last SPI message.
This can be used by an external microcontroller as a dead man's switch.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for registering SPI slave controllers using the existing SPI
master framework:
- SPI slave controllers must use spi_alloc_slave() instead of
spi_alloc_master(), and should provide an additional callback
"slave_abort" to abort an ongoing SPI transfer request,
- SPI slave controllers are added to a new "spi_slave" device class,
- SPI slave handlers can be bound to the SPI slave device represented
by an SPI slave controller using a DT child node named "slave",
- Alternatively, (un)binding an SPI slave handler to the SPI slave
device represented by an SPI slave controller can be done by
(un)registering the slave device through a sysfs virtual file named
"slave".
From the point of view of an SPI slave protocol handler, an SPI slave
controller looks almost like an ordinary SPI master controller. The only
exception is that a transfer request will block on the remote SPI
master, and may be cancelled using spi_slave_abort().
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
The SPICC hardware block on the Amlogic SoCs is Communication oriented and
can do Full-Duplex 8- to 32-bit width SPI transfers up to 30MHz.
The current driver only supportd the PIO transfer mode since the DMA seems
broken on available hardware.
Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
If NO_DMA=y:
ERROR: "bad_dma_ops" [drivers/spi/spi-ti-qspi.ko] undefined!
Add a dependency on HAS_DMA to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
ARCH_VULCAN arm64 platform (for Broadcom Vulcan ARM64 processors) has
been discontinued. Cavium's ThunderX2 CN99XX (ARCH_THUNDER2) will be
the next revision of the platform.
Update compile dependencies and ACPI ID to reflect this change. There
is not need to retain ARCH_VULCAN since the Vulcan processor was never
in production and ARCH_VULCAN will be deleted soon.
Signed-off-by: Jayachandran C <jnair@caviumnetworks.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This driver should compile on all platforms, activate it under compile
test. The Lantiq specific parts are under ifdef and should be removed
when Lantiq platform supports common clock framework.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
This driver supports the Lantiq SSC SPI controller in master
mode. This controller is found on Intel (former Lantiq) SoCs like
the Danube, Falcon, xRX200, xRX300.
The hardware uses two hardware FIFOs one for received and one for
transferred bytes. When the driver writes data into the transmit FIFO
the complete word is taken from the FIFO into a shift register. The
data from this shift register is then written to the wire. This driver
uses the interrupts signaling the status of the FIFOs and not the shift
register. It is also possible to use the interrupts for the shift
register, but they will send a signal after every word. When using the
interrupts for the shift register we get a signal when the last word is
written into the shift register and not when it is written to the wire.
After all FIFOs are empty the driver busy waits till the hardware is
not busy any more and returns the transfer status.
Signed-off-by: Daniel Schwierzeck <daniel.schwierzeck@gmail.com>
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Falcon spi accesses some ebu functions which are not exported and can
not be accessed when build as module. Make this module bool instead.
Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Acked-by: Thomas Langer <thomas.langer@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The Broadcom BCM7XXX ARM and MIPS based SoCs share a similar hardware
block for SPI.
Signed-off-by: Jaedon Shin <jaedon.shin@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
If NO_DMA=y:
ERROR: "bad_dma_ops" [drivers/spi/spi-fsl-dspi.ko] undefined!
Add a dependency on HAS_DMA to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Marvell Armada 3700 SoC comprises an SPI Controller. This Controller
supports up to 4 SPI slave devices, with dedicated chip selects,supports
SPI mode 0/1/2 and 3, CPIO or Fifo mode with DMA transfers and different
SPI transfer mode (Single, Dual or Quad).
This commit adds basic driver support for FIFO mode. In this mode,
dedicated registers are used to store the instruction, the address, the
read mode and the data. Write and Read FIFO are used to store the
outcoming or incoming data. The data FIFOs are accessible via DMA or by
the CPU. Only the CPU is supported for now.
Signed-off-by: Romain Perier <romain.perier@free-electrons.com>
Tested-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
MVEBU chips (Armada XP, Armada 370 and others) are supported by this
driver. Mention this in the help text to make more obvious what is
already specified in the dependencies of this symbol.
Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch adds lpspi driver to support new i.MX products which use
lpspi instead of ecspi.
The lpspi can continue operating in stop mode when an appropriate
clock is available. It is also designed for low CPU overhead with
DMA offloading of FIFO register accesses.
Signed-off-by: Gao Pan <pandy.gao@nxp.com>
Reviewed-by: Fugang Duan <B38611@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
After having removed all code dependencies we can make fsl-espi
completely independent of fsl-lib now.
Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The driver only has runtime but no build time dependency with PLAT_SAMSUNG
|| ARCH_EXYNOS so it can be built for testing purposes if the COMPILE_TEST
option is enabled.
This is useful to have more build coverage and make sure that the driver
is not affected by changes that could cause build regressions.
Signed-off-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Master SPI driver for Broadcom settop, iProc SoCs. The driver
is used for devices that use SPI protocol on BRCMSTB, NSP, NS2
SoCs. SoC platform driver call exported porbe(), remove()
and suspend/resume pm_ops implemented in this common driver.
Signed-off-by: Kamal Dasu <kdasu.kdev@gmail.com>
Signed-off-by: Yendapally Reddy Dhananjaya Reddy
Signed-off-by: Mark Brown <broonie@kernel.org>
"spi_sh_msiof" is used on sh7723 and sh7724 only. As all of the above
select ARCH_SHMOBILE, restrict its driver dependencies from SUPERH to
ARCH_SHMOBILE.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: Simon Horman <horms+renesas@verge.net.au>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add ThunderX SPI driver using the shared part from the Octeon
driver. The main difference of the ThunderX driver is that it
is a PCI device so probing is different. The system clock settings
can be specified in device tree.
Signed-off-by: Jan Glauber <jglauber@cavium.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The J-Core "spi2" device is a PIO-based SPI master controller. It
differs from "bitbang" devices in that that it's clocked in hardware
rather than via soft clock modulation over gpio, and performs
byte-at-a-time transfers between the cpu and SPI controller.
This driver will be extended to support future versions of the J-Core
SPI controller with DMA transfers when they become available.
Signed-off-by: Rich Felker <dalias@libc.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The function sg_split will be used by spi-omap2-mcspi to handle a SoC
workaround in the SPI driver. Therefore, select SG_SPLIT so this function
is available to the driver.
Signed-off-by: Franklin S Cooper Jr <fcooper@ti.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Even if DMA support is disabled code using DMA mapping APIs compiles fine,
but fails in linking.
-------
drivers/built-in.o: In function `ring_desc_ring_free':
spi-pic32-sqi.c:(.text+0x2cfbe0): undefined reference to `bad_dma_ops'
spi-pic32-sqi.c:(.text+0x2cfbe4): undefined reference to `bad_dma_ops'
drivers/built-in.o: In function `pic32_sqi_probe':
spi-pic32-sqi.c:(.text+0x2cfe48): undefined reference to `bad_dma_ops'
spi-pic32-sqi.c:(.text+0x2cfeb0): undefined reference to `bad_dma_ops'
spi-pic32-sqi.c:(.text+0x2cff38): undefined reference to `bad_dma_ops'
--------
Correct dependency by adding 'depends on HAS_DMA' in Kconfig.
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The relaxed I/O accessors are available on all architectures now.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
There is no build dependency for this driver, so enable COMPILE_TEST to get
better build coverage.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The SPI controller managed by the spi-orion is used on the new ARM64
Marvell Armada 7K/8K SoCs. In order to allow this driver to be built
for this platform, we allow it to be selected for ARCH_MVEBU=y
configurations.
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This driver implements SPI master interface for Quad SPI
controller, specifically for accessing quad SPI flash.
It uses descriptor-based DMA transfer mode and supports
half-duplex communication for single, dual and quad SPI
transactions.
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Cc: Mark Brown <broonie@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The PIC32 SPI driver is capable of performing SPI transfers
using PIO or external DMA engine. GPIO controlled /CS support
is made default in the driver for correct operation of the
controller. This can be enabled by adding "cs-gpios" property
of the SPI node in board dts file.
Signed-off-by: Purna Chandra Mandal <purna.mandal@microchip.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
- Vulcan spi controller is compatible with netlogic,xlp832-spi.
- Add depends on ARCH_VULCAN to Kconfig to enable spi controller
driver for Broadcom Vulcan ARM64 SoCs.
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
ICP DAS LP-8841 contains a DS-1302 RTC. This driver provides an SPI
master which makes the RTC usable. The driver is not supposed to work
with anything else.
The driver uses the standard MicroWire half-duplex transfer timing.
Master output is set on low clock and sensed by the RTC on the rising
edge. Master input is set by the RTC on the trailing edge and is sensed
by the master on low clock.
Signed-off-by: Sergei Ianovich <ynvich@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Make use of ARCH_RENESAS in place of ARCH_SHMOBILE.
This is part of an ongoing process to migrate from ARCH_SHMOBILE to
ARCH_RENESAS the motivation for which being that RENESAS seems to be a more
appropriate name than SHMOBILE for the majority of Renesas ARM based SoCs.
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@kernel.org>
The GPIO subsystem provides dummy GPIO consumer functions if GPIOLIB is
not enabled. Hence drivers that depend on GPIOLIB, but use GPIO consumer
functionality only, can still be compiled if GPIOLIB is not enabled.
Relax the dependency of SPI_BCM2835AUX on GPIOLIB if COMPILE_TEST is
enabled.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch adds support for the AXI SPI Engine controller which is a FPGA
soft-peripheral which is used in some of Analog Devices' reference designs.
The AXI SPI Engine controller is part of the SPI Engine framework[1] and
allows memory mapped access to the SPI Engine control bus. This allows it
to be used as a general purpose software driven SPI controller. The SPI
Engine in addition offers some optional advanced acceleration and
offloading capabilities, which are not part of this patch though and will
be introduced separately.
At the core of the SPI Engine framework is a small sort of co-processor
that accepts a command stream and turns the commands into low-level SPI
transactions. Communication is done through three memory mapped FIFOs in
the register map of the AXI SPI Engine peripheral. One FIFO for the command
stream and one each for transmit and receive data.
The driver translates a spi_message in a command stream and writes it to
the peripheral which executes it asynchronously. This allows it to perform
very precise timings which are required for some SPI slave devices to
achieve maximum performance (e.g. analog-to-digital and digital-to-analog
converters). The execution flow is synchronized to the host system by a
special synchronize instruction which generates a interrupt.
[1] https://wiki.analog.com/resources/fpga/peripherals/spi_engine
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
After removal of legacy PXA DMA code by the commit 6356437e65
("spi: spi-pxa2xx: remove legacy PXA DMA bits") the
CONFIG_SPI_PXA2XX_DMA follows the CONFIG_SPI_PXA2XX and cannot be disabled
alone. Therefore remove this config symbol and dead definitions from the
spi-pxa2xx.h.
Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
adding the spi-loopback-test module to Kconfig and Makefile
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Allow the topcliff-pch driver to be built for MIPS platforms, in
preparation for use on the MIPS Boston board.
Signed-off-by: Paul Burton <paul.burton@imgtec.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
LS1043a and LS2080A in the Layerscape family also support DSPI, make
DSPI selectable for these hardwares.
Signed-off-by: Yuan Yao <yao.yuan@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Move all register definitions and structs into the driver. This allows
us dropping the platform_data struct and drop any arch specific
includes. Make use of different device names to identify the version of
the block we have.
Since we now have full control over the message width, we can drop the
size check, which was broken anyway, since it never set ret to any error
code.
Also since we now have no arch depedendent resources, we can now allow
compiling it for any arch, hidden behind COMPILE_TEST.
Signed-off-by: Jonas Gorski <jogo@openwrt.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The bcm2835 has 2 auxiliary spi bus masters spi1 and spi2.
This implements the driver to enable these devices.
The driver does not implement native chip-selects but uses
the aribtrary GPIO-chip-selects provided by the spi-chipselect.
Note that this driver relies on the fact that
the clock is implemented by the clk-bcm2835-aux driver,
which enables/disables the HW block when requesting/releasing
the clock.
Signed-off-by: Martin Sperl <kernel@martin.sperl.org>
Acked-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add SPI Master controller driver for the SPI interface on XLP8XX,
XLP3XX, XLP2XX, XLP9XX and XLP5XX family of Netlogic XLP MIPS64 processors.
Signed-off-by: Kamlakant Patel <kamlakant.patel@broadcom.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch adds support for GQSPI controller driver used by
Zynq Ultrascale+ MPSoC
Signed-off-by: Ranjit Waghmode <ranjit.waghmode@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Generic DMA support was already implemented by commit cd7bed0034
("spi/pxa2xx: break out the private DMA API usage into a separate file")
which moved all the legacy PXA DMA implementation code into its own
file.
With generic DMA available for PXA, we can now just trash this file.
Signed-off-by: Daniel Mack <zonque@gmail.com>
Acked-by: Mark Brown <broonie@linaro.org>
[respin after pxa dmaengine support upstream]
Signed-off-by: Robert Jarzmik <robert.jarzmik@free.fr>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The GPIO subsystem provides dummy GPIO consumer functions if GPIOLIB is
not enabled. Hence drivers that depend on GPIOLIB, but use GPIO consumer
functionality only, can still be compiled if GPIOLIB is not enabled.
Relax the dependency on GPIOLIB if COMPILE_TEST is enabled, where
appropriate.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
I got following error on CONFIG_GPIOLIB=n.
drivers/spi/spi-bcm2835.c: In function 'chip_match_name':
drivers/spi/spi-bcm2835.c:356:21: error: dereferencing pointer to incomplete type 'struct gpio_chip'
return !strcmp(chip->label, data);
^
drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_setup':
drivers/spi/spi-bcm2835.c:382:9: error: implicit declaration of function 'gpiochip_find' [-Werror=implicit-function-declaration]
chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
^
drivers/spi/spi-bcm2835.c:382:7: warning: assignment makes pointer from integer without a cast [-Wint-conversion]
chip = gpiochip_find("pinctrl-bcm2835", chip_match_name);
^
drivers/spi/spi-bcm2835.c: In function 'chip_match_name':
drivers/spi/spi-bcm2835.c:357:1: warning: control reaches end of non-void function [-Wreturn-type]
}
^
Signed-off-by: Yoshinori Sato <ysato@users.sourceforge.jp>
Signed-off-by: Mark Brown <broonie@kernel.org>
LS1021A chip also has the DSPI module.
Add it to the dependence.
Signed-off-by: Haikun Wang <haikun.wang@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This driver mediates access between the connected CPLD and other devices
on the bus.
The m25p80-compatible boot flash and (some models) MMC use regular SPI,
bitbanged as required by the SoC. However the SPI-connected CPLD has
a two-wire mode, in which two bits are transferred per SPI clock
cycle. The second bit is transmitted with the SoC's CS2 pin.
Signed-off-by: Bert Vermeulen <bert@biot.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Fix:
drivers/spi/spi-bcm2835.c: In function 'chip_match_name':
drivers/spi/spi-bcm2835.c:356:21: error:
dereferencing pointer to incomplete type
drivers/spi/spi-bcm2835.c: In function 'bcm2835_spi_setup':
drivers/spi/spi-bcm2835.c:382:2: error:
` implicit declaration of function 'gpiochip_find'
drivers/spi/spi-bcm2835.c:387:21: error:
dereferencing pointer to incomplete type
by adding the now mandatory GPIOLIB dependency.
Fixes: a30a555d74 ("spi: bcm2835: transform native-cs to gpio-cs
on first spi_setup")
Cc: Martin Sperl <kernel@martin.sperl.org>
Signed-off-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
intel_mid_dma seems to be unmaintained for a long time. Moreover, the IP block
of DMA itself is the same in both dw_dmac and intel_mid_dma. This patch moves
spi-dw-midpci to use dw_dmac driver.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Remove Kconfig dependency and enable driver for
all ARCHs.
Also update help description.
Signed-off-by: Michal Simek <michal.simek@xilinx.com>
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Pull kconfig updates from Michal Marek:
"Yann E Morin was supposed to take over kconfig maintainership, but
this hasn't happened. So I'm sending a few kconfig patches that I
collected:
- Fix for missing va_end in kconfig
- merge_config.sh displays used if given too few arguments
- s/boolean/bool/ in Kconfig files for consistency, with the plan to
only support bool in the future"
* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild:
kconfig: use va_end to match corresponding va_start
merge_config.sh: Display usage if given too few arguments
kconfig: use bool instead of boolean for type definition attributes
DSPI module need cs change information in
a spi transfer. According to cs change, DSPI
will give last data the right flag. Bitbang
provide cs change behind the last data in
a transfer. So DSPI can not deal the last
data in every transfer properly, so remove
the bitbang in the driver.
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The pl08x driver originally selected S3C64XX_PL080 to avoid having
the legacy Samsung DMA interfaces. Those are now gone, so the
select is no longer needed, but it now causes problems when
CONFIG_DMA_ENGINE is disabled:
arch/arm/plat-samsung/built-in.o: In function `s3c64xx_spi0_set_platdata':
:(.init.text+0x518): undefined reference to `pl08x_filter_id'
This simply removes the 'select' to avoid this problem.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Mark Brown <broonie@kernel.org>
Support for keyword 'boolean' will be dropped later on.
No functional change.
Reference: http://lkml.kernel.org/r/cover.1418003065.git.cj@linux.com
Signed-off-by: Christoph Jaeger <cj@linux.com>
Signed-off-by: Michal Marek <mmarek@suse.cz>
This adds support for Diolan DLN2 USB-SPI adapter.
Information about the USB protocol interface can be found in the
Programmer's Reference Manual [1], see section 5.4.6 for the SPI
master module commands and responses.
[1] https://www.diolan.com/downloads/dln-api-manual.pdf
Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This patch adds support for the SPI portion of ST's SSC device.
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
The Meson SPIFC driver uses regmap mmio functions and so it must
select REGMAP_MMIO to avoid the following build error:
spi-meson-spifc.c: undefined reference to `devm_regmap_init_mmio_clk'
Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Exynos7 SPI controller supports only the auto Selection of
CS toggle mode and Exynos7 SoC includes six SPI controllers.
Add support for these changes in Exynos7 SPI controller driver.
Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This is a driver for the Amlogic Meson SPIFC (SPI flash controller),
which is one of the two SPI controllers available on the SoC. It
doesn't support DMA and has a 64-byte unified transmit/receive buffer.
The device is optimized for interfacing with SPI NOR memories and
allows the execution of standard operations such as read, page
program, sector erase, etc. in a simplified way, toggling a bit in a
dedicated register. The driver doesn't use those predefined commands
and relies only on custom transfers.
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Add support for the Synchronous Peripheral Flash Interface (SPFI) master
controller found on IMG SoCs. The SPFI controller supports 5 chip-select
lines and single/dual/quad mode SPI transfers.
Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
config SPI_BCM53XX needs to depend on BCMA_POSSIBLE and select BCMA.
This fixes below build error:
ERROR: "bcma_driver_unregister" [drivers/spi/spi-bcm53xx.ko] undefined!
ERROR: "__bcma_driver_register" [drivers/spi/spi-bcm53xx.ko] undefined!
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
The support of the Moorestown was removed [1] from kernel long time ago. This
is just a follow up of that change.
[1] http://www.spinics.net/lists/platform-driver-x86/msg02948.html
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
commit dd1053a93f ("spi/drivers: Enable build of drivers with
COMPILE_TEST") allows compile-testing drivers on platforms they're not
meant for.
However, adding "|| COMPILE_TEST" bypasses all other implicit dependencies
assumed by the platform dependencies before, like HAS_DMA.
If NO_DMA=y:
drivers/built-in.o: In function `atmel_spi_dma_unmap_xfer':
drivers/spi/spi-atmel.c:915: undefined reference to `dma_unmap_single'
drivers/spi/spi-atmel.c:918: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `atmel_spi_next_xfer_data':
drivers/spi/spi-atmel.c:690: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `atmel_spi_dma_map_xfer':
drivers/spi/spi-atmel.c:890: undefined reference to `dma_map_single'
drivers/spi/spi-atmel.c:893: undefined reference to `dma_mapping_error'
drivers/spi/spi-atmel.c:897: undefined reference to `dma_map_single'
drivers/spi/spi-atmel.c:900: undefined reference to `dma_mapping_error'
drivers/spi/spi-atmel.c:902: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `atmel_spi_probe':
drivers/spi/spi-atmel.c:1540: undefined reference to `dma_alloc_coherent'
drivers/spi/spi-atmel.c:1623: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `atmel_spi_remove':
drivers/spi/spi-atmel.c:1665: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `ep93xx_spi_dma_finish':
drivers/spi/spi-ep93xx.c:550: undefined reference to `dma_unmap_sg'
drivers/built-in.o: In function `ep93xx_spi_dma_prepare':
drivers/spi/spi-ep93xx.c:516: undefined reference to `dma_map_sg'
drivers/spi/spi-ep93xx.c:522: undefined reference to `dma_unmap_sg'
drivers/built-in.o: In function `omap2_mcspi_rx_dma':
drivers/spi/spi-omap2-mcspi.c:475: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `omap2_mcspi_txrx_dma':
drivers/spi/spi-omap2-mcspi.c:589: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `omap2_mcspi_transfer_one_message':
drivers/spi/spi-omap2-mcspi.c:1202: undefined reference to `dma_map_single'
drivers/spi/spi-omap2-mcspi.c:1204: undefined reference to `dma_mapping_error'
drivers/spi/spi-omap2-mcspi.c:1211: undefined reference to `dma_map_single'
drivers/spi/spi-omap2-mcspi.c:1213: undefined reference to `dma_mapping_error'
drivers/spi/spi-omap2-mcspi.c:1217: undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `tegra_spi_deinit_dma_param':
drivers/spi/spi-tegra114.c:675: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `tegra_spi_copy_spi_rxbuf_to_client_rxbuf':
drivers/spi/spi-tegra114.c:415: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra114.c:440: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_spi_copy_client_txbuf_to_spi_txbuf':
drivers/spi/spi-tegra114.c:381: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra114.c:405: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_spi_start_dma_based_transfer':
drivers/spi/spi-tegra114.c:543: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_slink_deinit_dma_param':
drivers/spi/spi-tegra20-slink.c:705: undefined reference to `dma_free_coherent'
drivers/built-in.o: In function `tegra_slink_copy_spi_rxbuf_to_client_rxbuf':
drivers/spi/spi-tegra20-slink.c:427: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra20-slink.c:452: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_slink_copy_client_txbuf_to_spi_txbuf':
drivers/spi/spi-tegra20-slink.c:393: undefined reference to `dma_sync_single_for_cpu'
drivers/spi/spi-tegra20-slink.c:417: undefined reference to `dma_sync_single_for_cpu'
drivers/built-in.o: In function `tegra_slink_start_dma_based_transfer':
drivers/spi/spi-tegra20-slink.c:561: undefined reference to `dma_sync_single_for_cpu'
Add dependencies on HAS_DMA to fix this.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
Broadcom 53xx ARM SoCs use bcma bus that contains various cores (AKA
devices). If board has a serial flash, it's connected over SPI and the
bcma bus includes a SPI controller. Example log from such a board:
bus0: Found chip with id 53010, rev 0x00 and package 0x02
(...)
bus0: Core 18 found: SPI flash controller (manuf 0x4BF, id 0x50A, rev 0x01, class 0x0)
This patch adds a bcma driver for SPI core, it registers SPI master
controller and "bcm53xxspiflash" SPI device.
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
SPI PXA2XX core layer has dependency on common clock framework
to obtain information on host supported clock rate. Thus, we
setup the clock device in the PCI glue layer to enable PCI mode
host pass in the clock rate information.
Signed-off-by: Chew, Chiau Ee <chiau.ee.chew@intel.com>
Acked-by: Kweh, Hock Leong <hock.leong.kweh@intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
As of commit ab116a4df4 ("dmaengine:
shdma: fix a build failure on platforms with no DMA support"), the DMA
filter function shdma_chan_filter() is sufficiently abstracted to allow
building without DMA support. Hence drop the SH_DMAE_BASE dependency on
SUPERH.
Also increase build coverage by allowing the driver to be enabled if
COMPILE_TEST=y.
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
If NO_DMA=y:
drivers/built-in.o: In function `sh_msiof_release_dma':
spi-sh-msiof.c:(.text+0x23cbfe): undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `sh_msiof_request_dma':
spi-sh-msiof.c:(.text+0x23cd5e): undefined reference to `dma_map_single'
spi-sh-msiof.c:(.text+0x23cd70): undefined reference to `dma_mapping_error'
spi-sh-msiof.c:(.text+0x23cdca): undefined reference to `dma_unmap_single'
drivers/built-in.o: In function `sh_msiof_dma_once':
spi-sh-msiof.c:(.text+0x23d450): undefined reference to `dma_sync_single_for_cpu'
spi-sh-msiof.c:(.text+0x23d5ea): undefined reference to `dma_sync_single_for_cpu'
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Mark Brown <broonie@linaro.org>
Without the dependencies for the accessors the driver can be enabled on
architectures where it will fail to build.
Signed-off-by: Mark Brown <broonie@linaro.org>
In order to facilitate understanding, rockchip SPI controller IP design
looks similar in its registers to designware. But IC implementation
is different from designware, So we need a dedicated driver for Rockchip
RK3XXX SoCs integrated SPI. The main differences:
- dma request line: rockchip SPI controller have two DMA request line
for tx and rx.
- Register offset:
RK3288 dw
SPI_CTRLR0 0x0000 0x0000
SPI_CTRLR1 0x0004 0x0004
SPI_SSIENR 0x0008 0x0008
SPI_MWCR NONE 0x000c
SPI_SER 0x000c 0x0010
SPI_BAUDR 0x0010 0x0014
SPI_TXFTLR 0x0014 0x0018
SPI_RXFTLR 0x0018 0x001c
SPI_TXFLR 0x001c 0x0020
SPI_RXFLR 0x0020 0x0024
SPI_SR 0x0024 0x0028
SPI_IPR 0x0028 NONE
SPI_IMR 0x002c 0x002c
SPI_ISR 0x0030 0x0030
SPI_RISR 0x0034 0x0034
SPI_TXOICR NONE 0x0038
SPI_RXOICR NONE 0x003c
SPI_RXUICR NONE 0x0040
SPI_MSTICR NONE 0x0044
SPI_ICR 0x0038 0x0048
SPI_DMACR 0x003c 0x004c
SPI_DMATDLR 0x0040 0x0050
SPI_DMARDLR 0x0044 0x0054
SPI_TXDR 0x0400 NONE
SPI_RXDR 0x0800 NONE
SPI_IDR NONE 0x0058
SPI_VERSION NONE 0x005c
SPI_DR NONE 0x0060
- register configuration:
such as SPI_CTRLRO in rockchip SPI controller:
cr0 = (CR0_BHT_8BIT << CR0_BHT_OFFSET)
| (CR0_SSD_ONE << CR0_SSD_OFFSET);
cr0 |= (rs->n_bytes << CR0_DFS_OFFSET);
cr0 |= ((rs->mode & 0x3) << CR0_SCPH_OFFSET);
cr0 |= (rs->tmode << CR0_XFM_OFFSET);
cr0 |= (rs->type << CR0_FRF_OFFSET);
For more information, see RK3288 chip manual.
- Wait for idle: Must ensure that the FIFO data has been sent out
before the next transfer.
Signed-off-by: addy ke <addy.ke@rock-chips.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
The spi-topcliff-pch driver is for a companion chip to the Intel Atom
E600 series processors. These are 32-bit x86 processors so the driver
is only needed on X86_32. Add COMPILE_TEST as an alternative, so that
the driver can still be build-tested elsewhere.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
Add dependency on ARM in Kconfig.
This is to fix the build error related to _relaxed IO.
Remove dependency on SPI_MASTER because this is already defined
under if SPI_MASTER in Kconfig.
Signed-off-by: Harini Katakam <harinik@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
Add driver for Cadence SPI controller. This is used in Xilinx Zynq.
Signed-off-by: Harini Katakam <harinik@xilinx.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
