Commit Graph

390 Commits

Author SHA1 Message Date
Naga Sureshkumar Relli
67dca5e580
spi: spi-mem: Add support for Zynq QSPI controller
Add support for QSPI controller driver used by Xilinx Zynq SOC.

Signed-off-by: Naga Sureshkumar Relli <naga.sureshkumar.relli@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-04-05 10:24:49 +07:00
Stefan Roese
cbd66c626e
spi: mt7621: Move SPI driver out of staging
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: Stefan 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: Mark Brown <broonie@kernel.org>
2019-03-25 12:13:34 +00:00
Yash Shah
484a9a68d6
spi: sifive: Add driver for the SiFive SPI controller
Add driver for the SiFive SPI controller
on the HiFive Unleashed board.

Signed-off-by: Palmer Dabbelt <palmer@sifive.com>
Signed-off-by: Emil Renner Berthing <kernel@esmil.dk>
Signed-off-by: Yash Shah <yash.shah@sifive.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-02-19 15:28:53 +00:00
Fabio Estevam
2e236bafab
spi: Kconfig: imx: Update the help text to make it more generic
The spi-imx driver supports both master and slave modes, so update
the help text to make it more generic.

Signed-off-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-28 17:58:11 +00:00
Yogesh Narayan Gaur
a5356aef6a
spi: spi-mem: Add driver for NXP FlexSPI controller
- 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>
2019-01-28 12:27:44 +00:00
Alban Bedel
b172fd0c89
spi: ath79: Enable support for compile test
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: Alban Bedel <albeu@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-17 12:34:47 +00:00
Alban Bedel
797622d7a3
spi: ath79: Simplify ath79_spi_chipselect()
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: Alban Bedel <albeu@free.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-17 12:34:39 +00:00
Cezary Gapinski
bb35c9f91a
spi: fix typo in SPI_STM32 help text
Fix typo from STMicroelectonics to STMicroelectronics.

Signed-off-by: Cezary Gapinski <cezary.gapinski@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-07 18:24:09 +00:00
Angelo Dureghello
0dcdcd0e42
spi: add cpu details to fsl-dspi Kconfig help
Add some cpu families that are actually using the fsl-dspi module
in the related Kconfig description.

Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-07 18:15:41 +00:00
Frieder Schrempf
84d043185d
spi: Add a driver for the Freescale/NXP QuadSPI controller
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>
2019-01-07 16:56:24 +00:00
Mark Brown
74ff666bd7
Merge remote-tracking branches 'spi/topic/mem' and 'spi/topic/mtd' into spi-next 2018-12-20 16:01:30 +00:00
Arnd Bergmann
2a9d92fb3a
mtd: atmel-quadspi: disallow building on ebsa110
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
2018-12-11 01:15:11 +00:00
Tomer Maimon
2a22f1b30c
spi: npcm: add NPCM PSPI controller driver
Add Nuvoton NPCM BMC Peripheral SPI controller driver.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-11-13 12:01:22 -08:00
Vignesh R
81df42d104
spi: Kconfig: Enable McSPI driver for K3 platforms
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>
2018-11-07 14:55:59 +00:00
Piotr Bugalski
0e6aae08e9
spi: Add QuadSPI driver for Atmel SAMA5D2
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>
2018-11-07 13:21:19 +00:00
Mason Yang
b942d80b0a
spi: Add MXIC controller driver
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>
2018-11-05 11:55:06 +00:00
Linus Torvalds
3ea172c84d - New Drivers
- Add support for USART SPI to AT91*
 
  - New Functionality
    - Add support for Audio CODECs to motorola-cpcap
 
  - Fix-ups
    - DT documentation fix-ups; atmel-usart
    - Staticise functions/structs; spi-at91-usart, arizona-core
    - Constify; ti-lmu
    - Fix memory leaks; menelaus
    - Change device 'wake-up' status; ti_am335x_tscadc, max8997
    - Power Management (suspend/resume) semantic changes; ti_am335x_adc, cros_ec, max8997
    - SPDX churn; sec-core (+ headers), max* (+ headers), intel* (+ headers),
    - Trivial (whitespace, email addresses, alphabetisise); Kconfig, adp5520, intel_soc_pmic_*
    - Build as module; sec-irq
    - Use new %pOFn printk format for device_node.name; max77620
    - Remove unused code; madera
    - Use generic MACROs; intel_msic, intel_soc_pmic_crc
    - Move to GPIOD; ti-lmu
    - Use managed resources; ti-lmu
 
  - Bug Fixes
    - Add missing headers; at91-usart
    - Prevent device from entering low-power mode; arizona-core
    - Poll for BOOT_DONE to avoid still-booting NACK; madera-core
    - Prevent ADC read from shutting down device; mc13xxx-core
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Merge tag 'mfd-next-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd

Pull MFD updates from Lee Jones:
 "New Drivers
   - Add support for USART SPI to AT91*

  New Functionality
   - Add support for Audio CODECs to motorola-cpcap

  Fix-ups
   - DT documentation fix-ups; atmel-usart
   - Staticise functions/structs; spi-at91-usart, arizona-core
   - Constify; ti-lmu
   - Fix memory leaks; menelaus
   - Change device 'wake-up' status; ti_am335x_tscadc, max8997
   - Power Management (suspend/resume) semantic changes; ti_am335x_adc, cros_ec, max8997
   - SPDX churn; sec-core (+ headers), max* (+ headers), intel* (+ headers),
   - Trivial (whitespace, email addresses, alphabetisise); Kconfig, adp5520, intel_soc_pmic_*
   - Build as module; sec-irq
   - Use new %pOFn printk format for device_node.name; max77620
   - Remove unused code; madera
   - Use generic MACROs; intel_msic, intel_soc_pmic_crc
   - Move to GPIOD; ti-lmu
   - Use managed resources; ti-lmu

  Bug Fixes
   - Add missing headers; at91-usart
   - Prevent device from entering low-power mode; arizona-core
   - Poll for BOOT_DONE to avoid still-booting NACK; madera-core
   - Prevent ADC read from shutting down device; mc13xxx-core"

* tag 'mfd-next-4.20' of git://git.kernel.org/pub/scm/linux/kernel/git/lee/mfd: (45 commits)
  mfd: cros_ec: Avoid unneeded internal declaration warning
  mfd: ti-lmu: Use of_device_get_match_data() helper
  mfd: ti-lmu: Use managed resource for everything
  mfd: ti-lmu: Switch to GPIOD
  mfd: ti-lmu: constify mfd_cell tables
  mfd: max8997: Disable interrupt handling for suspend/resume cycle
  mfd: max8997: Enale irq-wakeup unconditionally
  mfd: arizona: Make array mclk_name static, shrinks object size
  MAINTAINERS: Add myself as designated reviewer of Intel MFD PMIC
  mfd: Convert Intel PMIC drivers to use SPDX identifier 1;5201;0c Reduce size of duplicated comments by switching to use SPDX identifier.
  mfd: Sort headers alphabetically for Intel PMIC drivers
  mfd: intel_soc_pmic_bxtwc: Chain power button IRQs as well
  mfd: intel_soc_pmic_crc: Use REGMAP_IRQ_REG() macro
  mfd: intel_soc_pmic_crc: Use DEFINE_RES_IRQ_NAMED() macro
  mfd: intel_msic: Use DEFINE_RES_IRQ() macro
  mfd: motorola-cpcap: Add audio-codec support
  mfd: mc13xxx-core: Fix PMIC shutdown when reading ADC values
  mfd: madera: Remove unused forward reference
  mfd: max77620: Convert to using %pOFn instead of device_node.name
  mfd: madera: Don't use regmap_read_poll_timeout to poll for BOOT_DONE
  ...
2018-10-25 06:19:15 -07:00
Florian Fainelli
79a15f4974
spi: Allow building SPI_BCM63XX_HSSPI on ARM-based SoCs
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>
2018-10-21 12:08:27 +01:00
Ludovic Barre
c530cd1d9d
spi: spi-mem: add stm32 qspi controller
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>
2018-10-19 13:32:56 +01:00
Girish Mahadevan
561de45f72
spi: spi-geni-qcom: Add SPI driver support for GENI based QUP
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>
2018-10-11 15:28:02 +01:00
Girish Mahadevan
04000dc6f7
spi: Introduce new driver for Qualcomm QuadSPI controller
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>
2018-10-11 15:11:09 +01:00
Leilk Liu
805be7ddf3
spi: mediatek: add spi slave for Mediatek MT2712
This patch adds basic spi slave for MT2712.

Signed-off-by: Leilk Liu <leilk.liu@mediatek.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2018-09-28 14:29:14 +01:00
Radu Pirea
e1892546ff spi: at91-usart: Add driver for at91-usart as SPI
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>
2018-09-10 16:09:03 +01:00
Lanqing Liu
e7d973a31c
spi: sprd: Add SPI driver for Spreadtrum SC9860
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>
2018-08-28 21:19:20 +01:00
Keiji Hayashibara
5ba155a4d4
spi: add SPI controller driver for UniPhier SoC
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>
2018-08-01 11:22:37 +01:00
Fabio Estevam
29e795ca01
spi: Fix typo on SPI_MEM help text
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>
2018-05-31 11:23:09 +01:00
Boris Brezillon
c36ff266dc
spi: Extend the core to ease integration of SPI memory controllers
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>
2018-05-11 11:32:43 +09:00
Rafał Miłecki
055ed0dabc
spi: remove forgotten CONFIG_SPI_BCM53XX
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>
2018-05-10 22:30:17 +09:00
Geert Uytterhoeven
e5b43ed2f0
spi: Remove depends on HAS_DMA in case of platform dependency
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>
2018-04-18 11:28:19 +01:00
Arnd Bergmann
47838669de spi: remove blackfin related host drivers
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>
2018-03-26 15:57:05 +02:00
Arnd Bergmann
a687a53370 treewide: simplify Kconfig dependencies for removed archs
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>
2018-03-26 15:55:57 +02:00
Mark Brown
abbdb5ce31
Merge remote-tracking branches 'spi/topic/sh-msiof', 'spi/topic/slave', 'spi/topic/spreadtrum' and 'spi/topic/tegra114' into spi-next 2017-11-10 21:33:51 +00:00
Angelo Dureghello
ec7ed7708e
spi: spi-fsl-dspi: enabling Coldfire mcf5441x dspi
Signed-off-by: Angelo Dureghello <angelo@sysam.it>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-11-03 12:53:16 +01:00
Arnd Bergmann
e83f374247 spi: spreadtrum adi: add hwspinlock dependency
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>
2017-10-05 21:57:16 +01:00
Fabio Estevam
da39471232 spi: Kconfig: Remove old comments now that SPI slave is supported
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>
2017-09-20 11:46:56 +01:00
Baolin Wang
7e2903cb91 spi: Add ADI driver for Spreadtrum platform
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>
2017-09-19 12:53:29 +01:00
Mark Brown
17c49e53f3 Merge remote-tracking branches 'spi/topic/pxa', 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/sh' into spi-next 2017-09-04 15:51:26 +01:00
Lars-Peter Clausen
e19b63cd3c spi: altera: Switch to SPI core transfer queue management
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>
2017-08-16 11:53:27 +01:00
Arnd Bergmann
128345b13d spi: fix building SPI_PXA on MMP
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>
2017-08-07 16:47:46 +01:00
Mark Brown
082f6968bb Merge remote-tracking branches 'spi/topic/spidev', 'spi/topic/st-ssc4' and 'spi/topic/stm32' into spi-next 2017-07-03 16:21:12 +01:00
Mark Brown
15f8c9af83 Merge remote-tracking branches 'spi/topic/loopback', 'spi/topic/meson-spicc', 'spi/topic/mtk' and 'spi/topic/omap2-mcspi' into spi-next 2017-07-03 16:21:08 +01:00
Mark Brown
9d540b0d49 Merge remote-tracking branch 'spi/topic/master' into spi-next 2017-07-03 16:21:05 +01:00
Amelie Delaunay
dcbe0d84df spi: add driver for STM32 SPI controller
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>
2017-06-21 16:15:54 +01:00
Geert Uytterhoeven
ce70e06c09 spi: slave: Add SPI slave handler controlling system state
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>
2017-05-26 13:12:19 +01:00
Geert Uytterhoeven
29f9ffa0e1 spi: slave: Add SPI slave handler reporting uptime at previous message
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>
2017-05-26 13:12:04 +01:00
Geert Uytterhoeven
6c364062bf spi: core: Add support for registering SPI slave controllers
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>
2017-05-26 13:11:00 +01:00
Neil Armstrong
454fa271bc spi: Add Meson SPICC driver
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>
2017-05-24 18:19:25 +01:00
Geert Uytterhoeven
967d6941f4 spi: SPI_TI_QSPI should depend on HAS_DMA
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>
2017-05-14 18:49:55 +09:00
Mark Brown
282ec0ea65 Merge remote-tracking branches 'spi/topic/ti-qspi' and 'spi/topic/xlp' into spi-next 2017-04-26 15:58:22 +01:00
Jayachandran C
251831bd4f spi: xlp: update for ARCH_VULCAN2
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>
2017-03-13 16:48:40 +00:00