The ARM w90x900 platform is getting removed, so this driver is obsolete.

Link: https://lore.kernel.org/r/20190809202749.742267-8-arnd@arndb.deSigned-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

Add Nuvoton NPCM BMC Flash Interface Unit(FIU) SPI master
controller driver using SPI-MEM interface.

The FIU supports single, dual or quad communication interface.

the FIU controller can operate in following modes:
- User Mode Access(UMA): provides flash access by using an
  indirect address/data mechanism.
- direct rd/wr mode: maps the flash memory into the core
  address space.
- SPI-X mode: used for an expansion bus to an ASIC or CPLD.
Signed-off-by: NTomer Maimon <tmaimon77@gmail.com>
Link: https://lore.kernel.org/r/20190828142513.228556-3-tmaimon77@gmail.comSigned-off-by: NMark Brown <broonie@kernel.org>

While there's one file there with briefily describes the uAPI,
the documentation was written just like most subsystems: focused
on kernel developers. So, add it together with driver-api books.
Signed-off-by: NMauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio
Signed-off-by: NJonathan Corbet <corbet@lwn.net>

This patch adds support for controller found on synquacer platforms.
Signed-off-by: NMasahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: NJassi Brar <jaswinder.singh@linaro.org>
Reviewed-by: NArd Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add SPDX license identifiers to all Make/Kconfig files which:

 - Have no license information of any form

These files fall under the project license, GPL v2 only. The resulting SPDX
license identifier is:

  GPL-2.0-only
Signed-off-by: NThomas Gleixner <tglx@linutronix.de>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

ARCH_BRCMSTB platforms have the BCM2835 SPI controllers (normal and
auxiliary), allow selecting the two drivers on such platforms.
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: NEric Anholt <eric@anholt.net>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add support for QSPI controller driver used by Xilinx Zynq SOC.
Signed-off-by: NNaga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

This patch moves the MT7621 SPI driver, which is used on some Ralink /
MediaTek MT76xx MIPS SoC's, out of the staging directory. No changes to
the source code are done in this patch.

This driver version was tested successfully on an MT7688 based platform
with an SPI NOR on CS0 and an SPI NAND on CS1 without any issues (so
far).

This patch also documents the devicetree bindings for the MT7621 SPI
device driver.
Signed-off-by: NStefan Roese <sr@denx.de>
Cc: Rob Herring <robh@kernel.org>
Cc: Mark Brown <broonie@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: NeilBrown <neil@brown.name>
Cc: Sankalp Negi <sankalpnegi2310@gmail.com>
Cc: Chuanhong Guo <gch981213@gmail.com>
Cc: John Crispin <john@phrozen.org>
Cc: Armando Miraglia <arma2ff0@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add driver for the SiFive SPI controller
on the HiFive Unleashed board.
Signed-off-by: NPalmer Dabbelt <palmer@sifive.com>
Signed-off-by: NEmil Renner Berthing <kernel@esmil.dk>
Signed-off-by: NYash Shah <yash.shah@sifive.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The spi-imx driver supports both master and slave modes, so update
the help text to make it more generic.
Signed-off-by: NFabio Estevam <festevam@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

- 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: NYogesh Narayan Gaur <yogeshnarayan.gaur@nxp.com>
Reviewed-by: NFrieder Schrempf <frieder.schrempf@kontron.de>
Reviewed-by: NBoris Brezillon <bbrezillon@kernel.org>
Tested-by: NAshish Kumar <Ashish.Kumar@nxp.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

To allow building this driver in compile test we need to remove all
dependency on headers from arch/mips/include. To allow this we
explicitly define all the registers locally instead of using
ar71xx_regs.h and we move the platform data struct definition to
include/linux/platform_data/spi-ath79.h.
Signed-off-by: NAlban Bedel <albeu@free.fr>
Signed-off-by: NMark Brown <broonie@kernel.org>

First of all this callback was slightly misused to setup the clock
polarity at the beginning of a transfer. Beside being at the wrong
place, it is also useless as only SPI mode 1 is supported. Instead
just make sure the base value used for IOC is suitable to start a
transfer by clearing the clock and data bits during the controller
setup.

This also remove the last direct usage of the GPIO API, so we can
remove the direct dependency on GPIOLIB.
Signed-off-by: NAlban Bedel <albeu@free.fr>
Signed-off-by: NMark Brown <broonie@kernel.org>

Fix typo from STMicroelectonics to STMicroelectronics.
Signed-off-by: NCezary Gapinski <cezary.gapinski@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add some cpu families that are actually using the fsl-dspi module
in the related Kconfig description.
Signed-off-by: NAngelo Dureghello <angelo@sysam.it>
Signed-off-by: NMark Brown <broonie@kernel.org>

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: NFrieder Schrempf <frieder.schrempf@kontron.de>
Acked-by: NHan Xu <han.xu@nxp.com>
Reviewed-by: NYogesh Gaur <yogeshnarayan.gaur@nxp.com>
Tested-by: NYogesh Gaur <yogeshnarayan.gaur@nxp.com>
Tested-by: NHan Xu <han.xu@nxp.com>
Reviewed-by: NBoris Brezillon <bbrezillon@kernel.org>
Signed-off-by: NMark 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: 161aaab8 ("mtd: atmel-quadspi: add driver for Atmel QSPI controller")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Reviewed-by: NBoris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: NMark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org

Add Nuvoton NPCM BMC Peripheral SPI controller driver.
Signed-off-by: NTomer Maimon <tmaimon77@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Enable McSPI driver to be built for K3 platforms, to support McSPI on
AM654 SoC of K3 family.
Signed-off-by: NVignesh R <vigneshr@ti.com>
Signed-off-by: NMark 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: NBoris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: NPiotr Bugalski <bugalski.piotr@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Add a driver for Macronix SPI controller IP.
Signed-off-by: NMason Yang <masonccyang@mxic.com.tw>
Reviewed-by: NBoris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: NMark 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: NFlorian Fainelli <f.fainelli@gmail.com>
Signed-off-by: NMark 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: NLudovic Barre <ludovic.barre@st.com>
Signed-off-by: NMark 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: NGirish Mahadevan <girishm@codeaurora.org>
Signed-off-by: NDilip Kota <dkota@codeaurora.org>
Signed-off-by: NAlok Chauhan <alokc@codeaurora.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Tested-by: NDouglas Anderson <dianders@chromium.org>
Reviewed-by: NStephen Boyd <swboyd@chromium.org>
Signed-off-by: NMark 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: NGirish Mahadevan <girishm@codeaurora.org>
Signed-off-by: NRyan Case <ryandcase@chromium.org>
Reviewed-by: NDouglas Anderson <dianders@chromium.org>
Reviewed-by: NStephen Boyd <swboyd@chromium.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

This patch adds basic spi slave for MT2712.
Signed-off-by: NLeilk Liu <leilk.liu@mediatek.com>
Signed-off-by: NMark 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: NRadu Pirea <radu.pirea@microchip.com>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Reviwed-by: NMark Brown <broonie@kernel.org>
Acked-by: NNicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: NLee Jones <lee.jones@linaro.org>

This patch adds the SPI controller driver for Spreadtrum SC9860 platform.
Signed-off-by: NLanqing Liu <lanqing.liu@spreadtrum.com>
Signed-off-by: NBaolin Wang <baolin.wang@linaro.org>
Signed-off-by: NMark 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: NKunihiko Hayashi <hayashi.kunihiko@socionext.com>
Signed-off-by: NKeiji Hayashibara <hayashibara.keiji@socionext.com>
Reviewed-by: NAndy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

The correct form is "a high-level", so fix it accordingly.
Signed-off-by: NFabio Estevam <fabio.estevam@nxp.com>
Reviewed-by: NBoris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: NMark 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: NBoris Brezillon <boris.brezillon@bootlin.com>
Reviewed-by: NFrieder Schrempf <frieder.schrempf@exceet.de>
Tested-by: NFrieder Schrempf <frieder.schrempf@exceet.de>
Signed-off-by: NMark 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: NRafał Miłecki <rafal@milecki.pl>
Signed-off-by: NMark 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: NGeert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: NMark Brown <broonie@kernel.org>
Acked-by: NRobin Murphy <robin.murphy@arm.com>
Acked-by: NMark Brown <broonie@kernel.org>
Signed-off-by: NMark Brown <broonie@kernel.org>

The blackfin architecture is getting removed, so these
won't be needed any more.
Acked-by: NMark Brown <broonie@kernel.org>
Acked-by: NAaron Wu <aaron.wu@analog.com>
Signed-off-by: NArnd 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: NKalle Valo <kvalo@codeaurora.org>
Acked-by: NAlexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: NArnd Bergmann <arnd@arndb.de>

The AVR32 symbol was removed in commit 26202873 ("avr32: remove
support for AVR32 architecture").
Signed-off-by: NUlf Magnusson <ulfalizer@gmail.com>
Signed-off-by: NMark Brown <broonie@kernel.org>

Signed-off-by: NAngelo Dureghello <angelo@sysam.it>
Signed-off-by: NMark Brown <broonie@kernel.org>

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: 7e2903cb ("spi: Add ADI driver for Spreadtrum platform")
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NMark Brown <broonie@kernel.org>

Since commit 6c364062 ("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: NFabio Estevam <fabio.estevam@nxp.com>
Acked-by: NGeert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: NMark Brown <broonie@kernel.org>

This patch adds ADI driver based on SPI framework for
Spreadtrum SC9860 platform.
Signed-off-by: NBaolin Wang <baolin.wang@spreadtrum.com>
Signed-off-by: NMark Brown <broonie@kernel.org>