Commit Graph

539 Commits

Author SHA1 Message Date
Ramuthevar Vadivel Murugan
ab2d28750a
spi: cadence-quadspi: Add QSPI support for Intel LGM SoC
Add QSPI controller support for Intel LGM SoC.

Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Link: https://lore.kernel.org/r/20201124041840.31066-2-vadivel.muruganx.ramuthevar@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-01-13 11:37:01 +00:00
Sowjanya Komatineni
921fc1838f
spi: tegra210-quad: Add support for Tegra210 QSPI controller
Tegra SoC has a Quad SPI controller starting from Tegra210.

This patch adds support for Tegra210 QSPI controller.

Signed-off-by: Sowjanya Komatineni <skomatineni@nvidia.com>
Link: https://lore.kernel.org/r/1608585459-17250-5-git-send-email-skomatineni@nvidia.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-01-06 13:09:30 +00:00
Thomas Bogendoerfer
74523a5dae
spi: txx9: Remove driver
CPU support for TX49xx is getting removed, so remove support SPI driver
for it.

Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Link: https://lore.kernel.org/r/20210105140305.141401-5-tsbogend@alpha.franken.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-01-05 15:42:23 +00:00
Adam Ford
f4a10fc422
spi: renesas rpc-if: Update Add RZ/G2 to Kconfig description
The SPI driver for the Renesas RPC-IF is present on the RZ/G2
Series.  Add that to the description.

Suggested-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Adam Ford <aford173@gmail.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Link: https://lore.kernel.org/r/20210102115412.3402059-3-aford173@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2021-01-04 14:26:18 +00:00
Serge Semin
7218838109
spi: dw-bt1: Fix undefined devm_mux_control_get symbol
I mistakenly added the select attributes to the SPI_DW_BT1_DIRMAP config
instead of having them defined in SPI_DW_BT1. If the kernel doesn't have
the MULTIPLEXER and MUX_MMIO configs manually enabled and the
SPI_DW_BT1_DIRMAP config hasn't been selected, Baikal-T1 SPI device will
always fail to be probed by the driver. Fix that and the error reported by
the test robot:

>> ld.lld: error: undefined symbol: devm_mux_control_get
   >>> referenced by spi-dw-bt1.c
   >>> spi/spi-dw-bt1.o:(dw_spi_bt1_sys_init) in archive drivers/built-in.a

by moving the MULTIPLEXER/MUX_MMIO configs selection to the SPI_DW_BT1
config.

Link: https://lore.kernel.org/lkml/202011161745.uYRlekse-lkp@intel.com/
Link: https://lore.kernel.org/linux-spi/20201116040721.8001-1-rdunlap@infradead.org/
Fixes: abf0090753 ("spi: dw: Add Baikal-T1 SPI Controller glue driver")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20201127144612.4204-1-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-11-27 14:49:39 +00:00
Linus Torvalds
e731f3146f ARM: SoC platform updates
SoC changes, a substantial part of this is cleanup of some of the older
 platforms that used to have a bunch of board files. In particular:
 
  - Removal of non-DT i.MX platforms that haven't seen activity in years,
    it's time to remove them.
  - A bunch of cleanup and removal of platform data for TI/OMAP platforms,
    moving over to genpd for power/reset control (yay!)
  - Major cleanup of Samsung S3C24xx and S3C64xx platforms, moving them
    closer to multiplatform support (not quite there yet, but getting
    close).
 
 THere are a few other changes too, smaller fixlets, etc. For new
 platform support, the primary ones re:
 
  - New SoC: Hisilicon SD5203, ARM926EJ-S platform.
  - Cpufreq support for i.MX7ULP
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Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC platform updates from Olof Johansson:
 "SoC changes, a substantial part of this is cleanup of some of the
  older platforms that used to have a bunch of board files.

  In particular:

   - Remove non-DT i.MX platforms that haven't seen activity in years,
     it's time to remove them.

   - A bunch of cleanup and removal of platform data for TI/OMAP
     platforms, moving over to genpd for power/reset control (yay!)

   - Major cleanup of Samsung S3C24xx and S3C64xx platforms, moving them
     closer to multiplatform support (not quite there yet, but getting
     close).

  There are a few other changes too, smaller fixlets, etc. For new
  platform support, the primary ones are:

   - New SoC: Hisilicon SD5203, ARM926EJ-S platform.

   - Cpufreq support for i.MX7ULP"

* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (121 commits)
  ARM: mstar: Select MStar intc
  ARM: stm32: Replace HTTP links with HTTPS ones
  ARM: debug: add UART early console support for SD5203
  ARM: hisi: add support for SD5203 SoC
  ARM: omap3: enable off mode automatically
  clk: imx: imx35: Remove mx35_clocks_init()
  clk: imx: imx31: Remove mx31_clocks_init()
  clk: imx: imx27: Remove mx27_clocks_init()
  ARM: imx: Remove unused definitions
  ARM: imx35: Retrieve the IIM base address from devicetree
  ARM: imx3: Retrieve the AVIC base address from devicetree
  ARM: imx3: Retrieve the CCM base address from devicetree
  ARM: imx31: Retrieve the IIM base address from devicetree
  ARM: imx27: Retrieve the CCM base address from devicetree
  ARM: imx27: Retrieve the SYSCTRL base address from devicetree
  ARM: s3c64xx: bring back notes from removed debug-macro.S
  ARM: s3c24xx: fix Wunused-variable warning on !MMU
  ARM: samsung: fix PM debug build with DEBUG_LL but !MMU
  MAINTAINERS: mark linux-samsung-soc list non-moderated
  ARM: imx: Remove remnant board file support pieces
  ...
2020-10-24 10:33:08 -07:00
Serge Semin
abf0090753
spi: dw: Add Baikal-T1 SPI Controller glue driver
Baikal-T1 is equipped with three DW APB SSI-based MMIO SPI controllers.
Two of them are pretty much normal: with IRQ, DMA, FIFOs of 64 words
depth, 4x CSs, but the third one as being a part of the Baikal-T1 System
Boot Controller has got a very limited resources: no IRQ, no DMA, only a
single native chip-select and Tx/Rx FIFO with just 8 words depth
available. In order to provide a transparent initial boot code execution
the Boot SPI controller is also utilized by an vendor-specific IP-block,
which exposes an SPI flash direct mapping interface. Since both direct
mapping and SPI controller normal utilization are mutual exclusive only
one of these interfaces can be used to access an external SPI slave
device. That's why a dedicated mux is embedded into the System Boot
Controller. All of that is taken into account in the Baikal-T1-specific DW
APB SSI glue driver implemented by means of the DW SPI core module.

Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20201007235511.4935-22-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-10-08 23:00:22 +01:00
Serge Semin
6423207e57
spi: dw: Add memory operations support
Aside from the synchronous Tx-Rx mode, which has been utilized to create
the normal SPI transfers in the framework of the DW SSI driver, DW SPI
controller supports Tx-only and EEPROM-read modes. The former one just
enables the controller to transmit all the data from the Tx FIFO ignoring
anything retrieved from the MISO lane. The later mode is so called
write-then-read operation: DW SPI controller first pushes out all the data
from the Tx FIFO, after that it'll automatically receive as much data as
has been specified by means of the CTRLR1 register. Both of those modes
can be used to implement the memory operations supported by the SPI-memory
subsystem.

The memory operation implementation is pretty much straightforward, except
a few peculiarities we have had to take into account to make things
working. Since DW SPI controller doesn't provide a way to directly set and
clear the native CS lane level, but instead automatically de-asserts it
when a transfer going on, we have to make sure the Tx FIFO isn't empty
during entire Tx procedure. In addition we also need to read data from the
Rx FIFO as fast as possible to prevent it' overflow with automatically
fetched incoming traffic. The denoted peculiarities get to cause even more
problems if DW SSI controller is equipped with relatively small FIFO and
is connected to a relatively slow system bus (APB) (with respect to the
SPI bus speed). In order to workaround the problems for as much as it's
possible, the memory operation execution procedure collects all the Tx
data into a single buffer and disables the local IRQs to speed the
write-then-optionally-read method up.

Note the provided memory operations are utilized by default only if
a glue driver hasn't provided a custom version of ones and this is not
a DW APB SSI controller with fixed automatic CS toggle functionality.

Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Link: https://lore.kernel.org/r/20201007235511.4935-18-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-10-08 23:00:19 +01:00
Olof Johansson
465c335bb5 Samsung S3C24xx and S3C64xx machine code cleanup for v5.10
Big cleanup for the Samsung S3C24xx and S3C64xx platforms, although it
 also touches files shared with S5Pv210 and Exynos.  This is mostly Arnd
 Bergmann work which Krzysztof Kozlowski took over, rebased and polished.
 
 The goal is to cleanup, merge and finally make the Samsung S3C24xx and
 S3C64xx architectures multiplatform.  The multiplatform did not happen
 yet here - just cleaning up and merging into one arch/arm/mach-s3c
 directory.  However this is step forward for multiplatform or at least
 to keep this code still maintainable.
 
 This pulls also branch with changes for Samsung SoC sound drivers from
 broonie/sound because the cleanups there were part of this series and
 all further patches depend on them.
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Merge tag 'samsung-soc-s3c-5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux into arm/soc

Samsung S3C24xx and S3C64xx machine code cleanup for v5.10

Big cleanup for the Samsung S3C24xx and S3C64xx platforms, although it
also touches files shared with S5Pv210 and Exynos.  This is mostly Arnd
Bergmann work which Krzysztof Kozlowski took over, rebased and polished.

The goal is to cleanup, merge and finally make the Samsung S3C24xx and
S3C64xx architectures multiplatform.  The multiplatform did not happen
yet here - just cleaning up and merging into one arch/arm/mach-s3c
directory.  However this is step forward for multiplatform or at least
to keep this code still maintainable.

This pulls also branch with changes for Samsung SoC sound drivers from
broonie/sound because the cleanups there were part of this series and
all further patches depend on them.

* tag 'samsung-soc-s3c-5.10' of https://git.kernel.org/pub/scm/linux/kernel/git/krzk/linux: (62 commits)
  ARM: s3c: Avoid naming clash of S3C24xx and S3C64xx timer setup
  ARM: s3c: Cleanup from old plat-samsung include
  ARM: s3c: make headers local if possible
  ARM: s3c: move into a common directory
  ARM: s3c24xx: stop including mach/hardware.h from mach/io.h
  cpufreq: s3c24xx: move low-level clk reg access into platform code
  cpufreq: s3c2412: use global s3c2412_cpufreq_setrefresh
  ARM: s3c: remove cpufreq header dependencies
  cpufreq: s3c24xx: split out registers
  fbdev: s3c2410fb: remove mach header dependency
  ARM: s3c24xx: bast: avoid irq_desc array usage
  ARM: s3c24xx: spi: avoid hardcoding fiq number in driver
  ARM: s3c24xx: include mach/irqs.h where needed
  ARM: s3c24xx: move s3cmci pinctrl handling into board files
  ARM: s3c24xx: move iis pinctrl config into boards
  ARM: s3c24xx: move spi fiq handler into platform
  ARM: s3c: adc: move header to linux/soc/samsung
  ARM: s3c24xx: move irqchip driver back into platform
  ARM: s3c24xx: move regs-spi.h into spi driver
  ARM: s3c64xx: remove mach/hardware.h
  ...

Link: https://lore.kernel.org/r/20200831154751.7551-1-krzk@kernel.org
Signed-off-by: Olof Johansson <olof@lixom.net>
2020-09-13 11:15:01 -07:00
Alex Dewar
2abaad6785
spi: qup: Allow for compile-testing on !ARM
There seems no reason to restrict testing to ARM, so remove this
constraint to improve test coverage.

Build-tested with allyesconfig on x86.

Signed-off-by: Alex Dewar <alex.dewar90@gmail.com>
Link: https://lore.kernel.org/r/20200904163709.110975-1-alex.dewar90@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-09-07 19:04:23 +01:00
Arnd Bergmann
db8230d29c ARM: s5pv210: don't imply CONFIG_PLAT_SAMSUNG
The plat-samsung directory and mach-s5pv210 can be build
completely independently, so split the two Kconfig symbols
CONFIG_PLAT_SAMSUNG and CONFIG_ARCH_S5PV210.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20200806182059.2431-18-krzk@kernel.org
Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
2020-08-19 21:34:26 +02:00
Lukas Wunner
ddf75be47c
spi: Prevent adding devices below an unregistering controller
CONFIG_OF_DYNAMIC and CONFIG_ACPI allow adding SPI devices at runtime
using a DeviceTree overlay or DSDT patch.  CONFIG_SPI_SLAVE allows the
same via sysfs.

But there are no precautions to prevent adding a device below a
controller that's being removed.  Such a device is unusable and may not
even be able to unbind cleanly as it becomes inaccessible once the
controller has been torn down.  E.g. it is then impossible to quiesce
the device's interrupt.

of_spi_notify() and acpi_spi_notify() do hold a ref on the controller,
but otherwise run lockless against spi_unregister_controller().

Fix by holding the spi_add_lock in spi_unregister_controller() and
bailing out of spi_add_device() if the controller has been unregistered
concurrently.

Fixes: ce79d54ae4 ("spi/of: Add OF notifier handler")
Signed-off-by: Lukas Wunner <lukas@wunner.de>
Cc: stable@vger.kernel.org # v3.19+
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Octavian Purdila <octavian.purdila@intel.com>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Link: https://lore.kernel.org/r/a8c3205088a969dc8410eec1eba9aface60f36af.1596451035.git.lukas@wunner.de
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-08-03 16:50:43 +01:00
Dilip Kota
040f7f9729
spi: lantiq: Add support to Lightning Mountain SoC
Add support to SPI controller on Intel Atom based Lightning Mountain SoC
which reuses Lantiq SPI controller IP.

Signed-off-by: Dilip Kota <eswara.kota@linux.intel.com>
Link: https://lore.kernel.org/r/4d61a75381aca9479f9fc15d07a7b05534da6bb3.1594957019.git.eswara.kota@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-07-22 01:55:59 +01:00
Tudor Ambarus
3e84cdd427
spi: Fix SPI NOR and SPI NAND acronyms
The industry refers to these flash types as "SPI NOR" and
"SPI NAND". Be consistent and use the same acronyms.

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200716051144.568606-1-tudor.ambarus@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-07-17 00:55:25 +01:00
Tudor Ambarus
b780c3f388
spi: atmel-quadspi: Use optimezed memcpy_fromio()/memcpy_toio()
Optimezed mem*io operations are defined for LE platforms, use them.

The ARM and !ARCH_EBSA110 dependencies for COMPILE_TEST were added
only for the _memcpy_fromio()/_memcpy_toio() functions. Drop these
dependencies.

Tested unaligned accesses on both sama5d2 and sam9x60 QSPI controllers
using SPI NOR flashes, everything works ok. The following performance
improvement can be seen when running mtd_speedtest:

sama5d2_xplained (mx25l25635e)
- before:
	mtd_speedtest: eraseblock write speed is 983 KiB/s
	mtd_speedtest: eraseblock read speed is 6150 KiB/s
- after:
	mtd_speedtest: eraseblock write speed is 1055 KiB/s
	mtd_speedtest: eraseblock read speed is 20144 KiB/s

sam9x60ek (sst26vf064b)
- before:
	mtd_speedtest: eraseblock write speed is 4770 KiB/s
	mtd_speedtest: eraseblock read speed is 8062 KiB/s
- after:
	mtd_speedtest: eraseblock write speed is 4524 KiB/s
	mtd_speedtest: eraseblock read speed is 21186 KiB/s

Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200716043139.565734-1-tudor.ambarus@microchip.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-07-17 00:55:24 +01:00
Mark Brown
d194a22f50
Merge series "mtd: spi-nor: Move cadence-qaudspi to spi-mem framework" from Vignesh Raghavendra <vigneshr@ti.com>:
This series is a subset of "[PATCH v12 0/4] spi: cadence-quadspi: Add
support for the Cadence QSPI controller" by Ramuthevar,Vadivel MuruganX
<vadivel.muruganx.ramuthevar@linux.intel.com> that intended to move
cadence-quadspi driver to spi-mem framework

Those patches were trying to accomplish too many things in a single set
of patches and need to split into smaller patches. This is reduced
version of above series.

Changes that are intended to make migration easy are split into separate
patches. Patches 1 to 3 drop features that cannot be supported under
spi-mem at the moment (backward compatibility is maintained).
Patch 4-5 are trivial cleanups. Patch 6 does the actual conversion to
spi-mem and patch 7 moves the driver to drivers/spi folder.

I have tested both INDAC mode (used by non TI platforms like Altera
SoCFPGA) and DAC mode (used by TI platforms) on TI EVMs.

Patches to move move bindings over to
"Documentation/devicetree/bindings/spi/" directory and also conversion
of bindig doc to YAML will be posted separately.  Support for Intel
platform would follow that.

Resend v3:
Rebased onto v5.7-c1

v3:
Split handling of probe deferral into separate patch (out of 5/6)
Split dropping of redundant WREN to separate patch (out of 5/6)
Fix a possible memleak due to lack of spi_master_put()
Parse all SPI slave nodes in cqspi_setup_flash()
Address misc comments from Tudor on v2
Rebase onto latest spi-nor/next

v2:
Rework patch 1/6 to keep "cdns,is-decoded-cs" property supported.

Ramuthevar Vadivel Murugan (2):
  mtd: spi-nor: Convert cadence-quadspi to use spi-mem framework
  spi: Move cadence-quadspi driver to drivers/spi/

Vignesh Raghavendra (6):
  mtd: spi-nor: cadence-quadspi: Make driver independent of flash
    geometry
  mtd: spi-nor: cadence-quadspi: Provide a way to disable DAC mode
  mtd: spi-nor: cadence-quadspi: Don't initialize rx_dma_complete on
    failure
  mtd: spi-nor: cadence-quadspi: Fix error path on failure to acquire
    reset lines
  mtd: spi-nor: cadence-quadspi: Handle probe deferral while requesting
    DMA channel
  mtd: spi-nor: cadence-quadspi: Drop redundant WREN in erase path

 drivers/mtd/spi-nor/controllers/Kconfig       |  11 -
 drivers/mtd/spi-nor/controllers/Makefile      |   1 -
 drivers/spi/Kconfig                           |  11 +
 drivers/spi/Makefile                          |   1 +
 .../spi-cadence-quadspi.c}                    | 541 +++++++-----------
 5 files changed, 222 insertions(+), 343 deletions(-)
 rename drivers/{mtd/spi-nor/controllers/cadence-quadspi.c => spi/spi-cadence-quadspi.c} (74%)

base-commit: b3a9e3b962

--
2.26.2

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http://lists.infradead.org/mailman/listinfo/linux-mtd/
2020-06-19 14:26:55 +01:00
Ramuthevar Vadivel Murugan
31fb632b5d
spi: Move cadence-quadspi driver to drivers/spi/
Now that cadence-quadspi has been converted to use spi-mem framework,
move it under drivers/spi/

Update license header to match SPI subsystem style

Signed-off-by: Ramuthevar Vadivel Murugan <vadivel.muruganx.ramuthevar@linux.intel.com>
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-9-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-06-19 14:26:54 +01:00
Xu Yilun
3c6519736e
spi: altera: use regmap-mmio instead of direct mmio register access
This patch adds support for regmap. It makes preparation for supporting
different ways to access the registers.

Signed-off-by: Matthew Gerlach <matthew.gerlach@linux.intel.com>
Signed-off-by: Wu Hao <hao.wu@intel.com>
Signed-off-by: Xu Yilun <yilun.xu@intel.com>
Signed-off-by: Russ Weight <russell.h.weight@intel.com>
Reviewed-by: Tom Rix <trix@redhat.com>
Link: https://lore.kernel.org/r/1592531021-11412-2-git-send-email-yilun.xu@intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-06-19 12:56:04 +01:00
Mark Brown
75bc1138ab
Merge series "spi: bcm63xx: add BMIPS support" from Álvaro Fernández Rojas <noltari@gmail.com>:
BCM63xx SPI and HSSPI controller are present on several BMIPS SoCs (BCM6318,
BCM6328, BCM6358, BCM6362, BCM6368 and BCM63268).

v2: use devm_reset_control_get_exclusive

Álvaro Fernández Rojas (4):
  spi: bcm63xx-spi: add reset support
  spi: bcm63xx-spi: allow building for BMIPS
  spi: bcm63xx-hsspi: add reset support
  spi: bcm63xx-hsspi: allow building for BMIPS

 drivers/spi/Kconfig             |  4 ++--
 drivers/spi/spi-bcm63xx-hsspi.c | 17 +++++++++++++++++
 drivers/spi/spi-bcm63xx.c       | 17 +++++++++++++++++
 3 files changed, 36 insertions(+), 2 deletions(-)

--
2.27.0

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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
2020-06-16 00:38:41 +01:00
Sergei Shtylyov
eb8d6d464a
spi: add Renesas RPC-IF driver
Add the SPI driver for the Renesas RPC-IF.  It's the "front end" driver
using the "back end" APIs in the main driver to talk to the real hardware.
We only implement the 'spi-mem' interface -- there's no need to implement
the usual SPI driver methods...

Based on the original patch by Mason Yang <masonccyang@mxic.com.tw>.

Signed-off-by: Sergei Shtylyov <sergei.shtylyov@cogentembedded.com>
Link: https://lore.kernel.org/r/1ece0e6c-71af-f0f1-709e-571f4b0b4853@cogentembedded.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-06-16 00:38:38 +01:00
Álvaro Fernández Rojas
ba2137f3db
spi: bcm63xx-hsspi: allow building for BMIPS
bcm63xx-hsspi controller is present on several BMIPS SoCs (BCM6318, BCM6328,
BCM6362 and BCM63268).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200615090943.2936839-5-noltari@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-06-16 00:17:27 +01:00
Álvaro Fernández Rojas
3a521450ff
spi: bcm63xx-spi: allow building for BMIPS
bcm63xx-spi controller is present on several BMIPS SoCs (BCM6358, BCM6362,
BCM6368 and BCM63268).

Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
Acked-by: Florian Fainelli <f.fainelli@gmail.com>
Link: https://lore.kernel.org/r/20200615090943.2936839-3-noltari@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-06-16 00:17:26 +01:00
Serge Semin
ecb3a67edf
spi: dw: Add DW SPI DMA/PCI/MMIO dependency on the DW SPI core
Seeing all of the DW SPI driver components like DW SPI DMA/PCI/MMIO
depend on the DW SPI core code it's better to use the if-endif
conditional kernel config statement to signify that common dependency.

Co-developed-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
Link: https://lore.kernel.org/r/20200529131205.31838-13-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-05-29 15:55:51 +01:00
Serge Semin
06cfadb8c5
spi: dw: Remove DW DMA code dependency from DW_DMAC_PCI
Since there is a generic method available to initialize the DW SPI DMA
interface on any DT and ACPI-based platforms, which in general can be
designed with not only DW DMAC but with any DMA engine on board, we can
freely remove the CONFIG_DW_DMAC_PCI config from dependency list of
CONFIG_SPI_DW_DMA. Especially seeing that we don't use anything DW DMAC
specific in the new driver.

Co-developed-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
Link: https://lore.kernel.org/r/20200529131205.31838-12-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-05-29 15:55:51 +01:00
Serge Semin
6c710c0cb6
spi: dw: Move Non-DMA code to the DW PCIe-SPI driver
This is a preparation patch before adding the DW DMA support into the
DW SPI MMIO driver. We need to unpin the Non-DMA-specific code from the
intended to be generic DW APB SSI DMA code. This isn't that hard,
since the most part of the spi-dw-mid.c driver in fact implements a
generic DMA interface for the DW SPI controller driver. The only Intel
MID specifics concern getting the max frequency from the MRST Clock
Control Unit and fetching the DMA controller channels from
corresponding PCIe DMA controller. Since first one is related with the
SPI interface configuration we moved it' implementation into the
DW PCIe-SPI driver module. After that former spi-dw-mid.c file
can be just renamed to be the DW SPI DMA module optionally compiled in to
the DW APB SSI core driver.

Co-developed-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Co-developed-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Georgy Vlasov <Georgy.Vlasov@baikalelectronics.ru>
Signed-off-by: Ramil Zaripov <Ramil.Zaripov@baikalelectronics.ru>
Signed-off-by: Serge Semin <Sergey.Semin@baikalelectronics.ru>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Cc: Alexey Malahov <Alexey.Malahov@baikalelectronics.ru>
Cc: Thomas Bogendoerfer <tsbogend@alpha.franken.de>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Feng Tang <feng.tang@intel.com>
Cc: Rob Herring <robh+dt@kernel.org>
Cc: linux-mips@vger.kernel.org
Cc: devicetree@vger.kernel.org
Link: https://lore.kernel.org/r/20200529131205.31838-11-Sergey.Semin@baikalelectronics.ru
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-05-29 15:55:50 +01:00
Kunihiko Hayashi
6a091404bf
spi: uniphier: Depend on HAS_IOMEM
The driver uses devm_ioremap_resource() which is only available when
CONFIG_HAS_IOMEM is set, so the driver depends on this option.

Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Link: https://lore.kernel.org/r/1589185530-28170-1-git-send-email-hayashi.kunihiko@socionext.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-05-11 18:17:51 +01:00
Sanjay R Mehta
bbb336f39e
spi: spi-amd: Add AMD SPI controller driver support
This driver supports SPI Controller for AMD SOCs.This driver
supports SPI operations using FIFO mode of transfer.

Signed-off-by: Sanjay R Mehta <sanju.mehta@amd.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/1587844788-33997-1-git-send-email-sanju.mehta@amd.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-04-27 16:38:32 +01:00
Linus Torvalds
848960e576 sound updates for 5.7-rc1
This became again a busy development cycle. There are a few ALSA
 core updates (merely API cleanups and sparse fixes), while majority
 of other changes are found in ASoC scene.
 
 Here are some highlights:
 
 * ALSA core:
 - More helper macros for sparse warning fixes (e.g. bitwise types)
 - Slight optimization of PCM OSS locks
 - Make common handling for PCM / compress buffers (for SOF)
 
 * ASoC:
 - Lots of code refactoring and modernization for (still ongoing)
   componentization works
 - Conversion of SND_SOC_ALL_CODECS to use imply
 - Continued refactoring and fixing of the Intel SOF/SST support,
   including the initial (but still incomplete) SoundWire support
 - SoundWire and more advanced clocking support for Realtek RT5682
 - Support for amlogic GX, Meson 8, Meson 8B and T9015 DAC, Broadcom
   DSL/PON, Ingenic JZ4760 and JZ4770, Realtek RL6231, and TI TAS2563
   and TLV320ADCX140
 
 * HD-audio:
 - Optimizations in HDMI jack handling
 - A few new quirks and fixups for Realtek codecs
 
 * USB-audio:
 - Delayed registration support
 - New quirks for Motu, Kingston, Presonus
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Merge tag 'sound-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "This became again a busy development cycle.  There are few ALSA core
  updates (merely API cleanups and sparse fixes), with the majority of
  other changes are found in ASoC scene.

  Here are some highlights:

  ALSA core:
   - More helper macros for sparse warning fixes (e.g. bitwise types)
   - Slight optimization of PCM OSS locks
   - Make common handling for PCM / compress buffers (for SOF)

  ASoC:
   - Lots of code refactoring and modernization for (still ongoing)
     componentization works
   - Conversion of SND_SOC_ALL_CODECS to use imply
   - Continued refactoring and fixing of the Intel SOF/SST support,
     including the initial (but still incomplete) SoundWire support
   - SoundWire and more advanced clocking support for Realtek RT5682
   - Support for amlogic GX, Meson 8, Meson 8B and T9015 DAC, Broadcom
     DSL/PON, Ingenic JZ4760 and JZ4770, Realtek RL6231, and TI TAS2563
     and TLV320ADCX140

  HD-audio:
   - Optimizations in HDMI jack handling
   - A few new quirks and fixups for Realtek codecs

  USB-audio:
   - Delayed registration support
   - New quirks for Motu, Kingston, Presonus"

* tag 'sound-5.7-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (415 commits)
  ALSA: usb-audio: Fix case when USB MIDI interface has more than one extra endpoint descriptor
  Revert "ALSA: uapi: Drop asound.h inclusion from asoc.h"
  ALSA: hda/realtek - Remove now-unnecessary XPS 13 headphone noise fixups
  ALSA: hda/realtek - Set principled PC Beep configuration for ALC256
  ALSA: doc: Document PC Beep Hidden Register on Realtek ALC256
  ALSA: hda/realtek - a fake key event is triggered by running shutup
  ALSA: hda: default enable CA0132 DSP support
  ASoC: amd: acp3x-pcm-dma: clean up two indentation issues
  ASoC: tlv320adcx140: Remove undocumented property
  ASoC: Intel: sof_sdw: Add Volteer support with RT5682 SNDW helper function
  ASoC: Intel: common: add match table for TGL RT5682 SoundWire driver
  ASoC: Intel: boards: add sof_sdw machine driver
  ASoC: Intel: soc-acpi: update topology and driver name for SoundWire platforms
  ASoC: rt5682: move DAI clock registry to I2S mode
  ASoC: pxa: magician: convert to use i2c_new_client_device()
  ASoC: SOF: Intel: hda-ctrl: add reset cycle before parsing capabilities
  Asoc: SOF: Intel: hda: check SoundWire wakeen interrupt in irq thread
  ASoC: SOF: Intel: hda: add WAKEEN interrupt support for SoundWire
  ASoC: SOF: Intel: hda: add parameter to control SoundWire clock stop quirks
  ASoC: SOF: Intel: hda: merge IPC, stream and SoundWire interrupt handlers
  ...
2020-04-02 15:50:04 -07:00
Sunny Luo
3e0cf4d3fc
spi: meson-spicc: add a linear clock divider support
The SPICC controller in Meson-AXG SoC is capable of using
a linear clock divider to reach a much fine tuned range of clocks,
while the old controller only use a power of two clock divider,
result at a more coarse clock range.

Also convert the clock registration into Common Clock Framework.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Yixun Lan <yixun.lan@amlogic.com>
Signed-off-by: Sunny Luo <sunny.luo@amlogic.com>
Link: https://lore.kernel.org/r/20200312133131.26430-4-narmstrong@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-12 17:22:51 +00:00
Mark Brown
b562b304ef spi: Rewrite mtk-quadspi spi-nor driver with spi-mem
This patchset from Chuanhong Guo <gch981213@gmail.com> adds a spi-mem
 driver for Mediatek SPI-NOR controller, which already has limited
 support by mtk-quadspi. This new driver can make use of full quadspi
 capability of this controller.
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Merge tag 'mtk-mtd-spi-move' of https://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-5.7

spi: Rewrite mtk-quadspi spi-nor driver with spi-mem

This patchset from Chuanhong Guo <gch981213@gmail.com> adds a spi-mem
driver for Mediatek SPI-NOR controller, which already has limited
support by mtk-quadspi. This new driver can make use of full quadspi
capability of this controller.
2020-03-11 19:58:20 +00:00
Chuanhong Guo
881d1ee9fe
spi: add support for mediatek spi-nor controller
This is a driver for mtk spi-nor controller using spi-mem interface.
The same controller already has limited support provided by mtk-quadspi
driver under spi-nor framework and this new driver is a replacement
for the old one.

Comparing to the old driver, this driver has following advantages:
1. It can handle any full-duplex spi transfer up to 6 bytes, and
   this is implemented using generic spi interface.
2. It take account into command opcode properly. The reading routine
   in this controller can only use 0x03 or 0x0b as opcode on 1-1-1
   transfers, but old driver doesn't implement this properly. This
   driver checks supported opcode explicitly and use (1) to perform
   unmatched operations.
3. It properly handles SFDP reading. Old driver can't read SFDP
   due to the bug mentioned in (2).
4. It can do 1-2-2 and 1-4-4 fast reading on spi-nor. These two ops
   requires parsing SFDP, which isn't possible in old driver. And
   the old driver is only flagged to support 1-1-2 mode.
5. It takes advantage of the DMA feature in this controller for
   long reads and supports IRQ on DMA requests to free cpu cycles
   from polling status registers on long DMA reading. It achieves
   up to 17.5MB/s reading speed (1-4-4 mode) which is way faster
   than the old one. IRQ is implemented as optional to maintain
   backward compatibility.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Link: https://lore.kernel.org/r/20200306085052.28258-3-gch981213@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-11 19:56:07 +00:00
John Garry
caef2df113
spi: Stop selecting MTD_SPI_NOR for SPI_HISI_SFC_V3XX
By selecting MTD_SPI_NOR for SPI_HISI_SFC_V3XX, we may introduce unmet
dependencies:

WARNING: unmet direct dependencies detected for MTD_SPI_NOR
  Depends on [m]: MTD [=m] && SPI_MASTER [=y]
  Selected by [y]:
  - SPI_HISI_SFC_V3XX [=y] && SPI [=y] && SPI_MASTER [=y] && (ARM64 && ACPI [=y] || COMPILE_TEST [=y]) && HAS_IOMEM [=y]

Since MTD_SPI_NOR is only selected by SPI_HISI_SFC_V3XX for practical
reasons - slave devices use the spi-nor driver, enabled by MTD_SPI_NOR -
just drop it.

Signed-off-by: John Garry <john.garry@huawei.com>

Link: https://lore.kernel.org/r/1583948115-239907-1-git-send-email-john.garry@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-11 18:35:21 +00:00
Eddie James
bbb6b2f986
spi: Add FSI-attached SPI controller driver
There exists a set of SPI controllers on some POWER processors that may
be accessed through the FSI bus. Add a driver to traverse the FSI CFAM
engine that can access and drive the SPI controllers. This driver would
typically be used by a baseboard management controller (BMC).

The SPI controllers operate by means of programming a sequencing engine
which automatically manages the usual SPI protocol buses. The driver
programs each transfer into the sequencer as various operations
specifying the slave chip and shifting data in and out on the lines.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20200306194118.18581-3-eajames@linux.ibm.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-10 14:11:57 +00:00
Joe Perches
e14572c525
spi: Remove CONFIG_ prefix from Kconfig select
commit a2ca53b52e ("spi: Add HiSilicon v3xx SPI NOR flash
controller driver") likely inadvertently used a select statement
with a CONFIG_ prefix, remove the prefix.

Reported-by: Randy Dunlap <rdunlap@infradead.org>
Signed-off-by: Joe Perches <joe@perches.com>
Acked-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/f8ac6b32a29b9a05b58a7e58ffe8b780642abbf1.camel@perches.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-03-06 15:19:16 +00:00
Chris Packham
e9e40543ad
spi: Add generic SPI multiplexer
Add a SPI device driver that sits in-band and provides a SPI controller
which supports chip selects via a mux-control. This enables extra SPI
devices to be connected with limited native chip selects.

Signed-off-by: Chris Packham <chris.packham@alliedtelesis.co.nz>
Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Link: https://lore.kernel.org/r/20200204032838.20739-3-chris.packham@alliedtelesis.co.nz
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-02-12 23:56:18 +00:00
Chuanhong Guo
047980c582
spi: add driver for ar934x spi controller
This patch adds driver for SPI controller found in Qualcomm Atheros
AR934x/QCA95xx SoCs.
This controller is a superset of the already supported qca,ar7100-spi.
Besides the bit-bang mode in spi-ath79.c, this new controller added
a new "shift register" mode, allowing faster spi operations.

Signed-off-by: Chuanhong Guo <gch981213@gmail.com>
Link: https://lore.kernel.org/r/20200210034152.49063-2-gch981213@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-02-11 11:37:30 +00:00
Geert Uytterhoeven
0d44164468
spi: pxa2xx: Enable support for compile-testing
m68k/allmodconfig:

    WARNING: unmet direct dependencies detected for SPI_PXA2XX
      Depends on [n]: SPI [=y] && SPI_MASTER [=y] && (ARCH_PXA || ARCH_MMP || PCI [=n] || ACPI)
      Selected by [m]:
      - SND_SOC_INTEL_BDW_RT5677_MACH [=m] && SOUND [=m] && !UML && SND [=m] && SND_SOC [=m] && SND_SOC_INTEL_MACH [=y] && (SND_SOC_INTEL_HASWELL [=n] || SND_SOC_SOF_BROADWELL [=m]) && I2C [=m] && (I2C_DESIGNWARE_PLATFORM [=m] || COMPILE_TEST [=y]) && (GPIOLIB [=y] || COMPILE_TEST [=y]) && (X86_INTEL_LPSS || COMPILE_TEST [=y]) && SPI_MASTER [=y]

This happens because SND_SOC_INTEL_BDW_RT5677_MACH selects SPI_PXA2XX,
and the former depends on COMPILE_TEST, while the latter does not.

Fix this by enabling compile-testing for SPI_PXA2XX.

Fixes: 630db15493 ("ASoC: Intel: bdw-rt5677: fix Kconfig dependencies")
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Reviewed-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200210093027.6672-1-geert@linux-m68k.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-02-11 11:25:42 +00:00
John Garry
a2ca53b52e
spi: Add HiSilicon v3xx SPI NOR flash controller driver
Add the driver for the HiSilicon v3xx SPI NOR flash controller, commonly
found in hi16xx chipsets.

This is a different controller than that in drivers/mtd/spi-nor/hisi-sfc.c;
indeed, the naming for that driver is poor, since it is really known as
FMC, and can support other memory technologies.

The driver module name is "hisi-sfc-v3xx", as recommended by HW designer,
being an attempt to provide a distinct name - v3xx being the unique
controller versioning.

Only ACPI firmware is supported.

DMA is not supported, and we just use polling mode for operation
completion notification.

The driver uses the SPI MEM OPs.

Signed-off-by: John Garry <john.garry@huawei.com>
Link: https://lore.kernel.org/r/1575900490-74467-3-git-send-email-john.garry@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-01-10 14:14:34 +00:00
Krzysztof Kozlowski
554bbe726c
spi: Fix Kconfig indentation
Adjust indentation from spaces to tab (+optional two spaces) as in
coding style with command like:
	$ sed -e 's/^        /\t/' -i */Kconfig

Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org>
Link: https://lore.kernel.org/r/20191120133916.13595-1-krzk@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-11-20 17:11:50 +00:00
Gregory CLEMENT
1cb84b02bf
spi: atmel: Remove platform data support
This driver is now only used through the device tree. Simplify code
by explicitly depend on device tree.

Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Link: https://lore.kernel.org/r/20191017141846.7523-6-gregory.clement@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-10-18 18:33:40 +01:00
Linus Torvalds
7c672abc12 It's a somewhat calmer cycle for docs this time, as the churn of the mass
RST conversion is happily mostly behind us.
 
  - A new document on reproducible builds.
 
  - We finally got around to zapping the documentation for hardware support
    that was removed in 2004; one doesn't want to rush these things.
 
  - The usual assortment of fixes, typo corrections, etc.
 
 You'll still find a handful of annoying conflicts against other trees,
 mostly tied to the last RST conversions; resolutions are straightforward
 and the linux-next ones are good.
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Merge tag 'docs-5.4' of git://git.lwn.net/linux

Pull documentation updates from Jonathan Corbet:
 "It's a somewhat calmer cycle for docs this time, as the churn of the
  mass RST conversion is happily mostly behind us.

   - A new document on reproducible builds.

   - We finally got around to zapping the documentation for hardware
     support that was removed in 2004; one doesn't want to rush these
     things.

   - The usual assortment of fixes, typo corrections, etc"

* tag 'docs-5.4' of git://git.lwn.net/linux: (67 commits)
  Documentation: kbuild: Add document about reproducible builds
  docs: printk-formats: Stop encouraging use of unnecessary %h[xudi] and %hh[xudi]
  Documentation: Add "earlycon=sbi" to the admin guide
  doc🔒 remove reference to clever use of read-write lock
  devices.txt: improve entry for comedi (char major 98)
  docs: mtd: Update spi nor reference driver
  doc: arm64: fix grammar dtb placed in no attributes region
  Documentation: sysrq: don't recommend 'S' 'U' before 'B'
  mailmap: Update email address for Quentin Perret
  docs: ftrace: clarify when tracing is disabled by the trace file
  docs: process: fix broken link
  Documentation/arm/samsung-s3c24xx: Remove stray U+FEFF character to fix title
  Documentation/arm/sa1100/assabet: Fix 'make assabet_defconfig' command
  Documentation/arm/sa1100: Remove some obsolete documentation
  docs/zh_CN: update Chinese howto.rst for latexdocs making
  Documentation: virt: Fix broken reference to virt tree's index
  docs: Fix typo on pull requests guide
  kernel-doc: Allow anonymous enum
  Documentation: sphinx: Don't parse socket() as identifier reference
  Documentation: sphinx: Add missing comma to list of strings
  ...
2019-09-17 16:22:26 -07:00
Linus Torvalds
399eb9b6cb ARM: SoC driver updates for v5.4
The branch contains driver changes that are tightly
 connected to SoC specific code. Aside from smaller
 cleanups and bug fixes, here is a list of the notable
 changes.
 
 New device drivers:
 
 - The Turris Mox router has a new "moxtet" bus driver
   for its on-board pluggable extension bus. The
   same platform also gains a firmware driver.
 
 - The Samsung Exynos family gains a new Chipid driver
   exporting using the soc device sysfs interface
 
 - A similar socinfo driver for Qualcomm Snapdragon
   chips.
 
 - A firmware driver for the NXP i.MX DSP IPC protocol
   using shared memory and a mailbox
 
 Other changes:
 
 - The i.MX reset controller driver now supports the
   NXP i.MX8MM chip
 
 - Amlogic SoC specific drivers gain support for
   the S905X3 and A311D chips
 
 - A rework of the TI Davinci framebuffer driver to
   allow important cleanups in the platform code
 
 - A couple of device drivers for removed ARM SoC
   platforms are removed. Most of the removals were
   picked up by other maintainers, this contains
   whatever was left.
 
 Signed-off-by: Arnd Bergmann <arnd@arndb.de>
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Merge tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc

Pull ARM SoC driver updates from Arnd Bergmann:
 "This contains driver changes that are tightly connected to SoC
  specific code. Aside from smaller cleanups and bug fixes, here is a
  list of the notable changes.

  New device drivers:

   - The Turris Mox router has a new "moxtet" bus driver for its
     on-board pluggable extension bus. The same platform also gains a
     firmware driver.

   - The Samsung Exynos family gains a new Chipid driver exporting using
     the soc device sysfs interface

   - A similar socinfo driver for Qualcomm Snapdragon chips.

   - A firmware driver for the NXP i.MX DSP IPC protocol using shared
     memory and a mailbox

  Other changes:

   - The i.MX reset controller driver now supports the NXP i.MX8MM chip

   - Amlogic SoC specific drivers gain support for the S905X3 and A311D
     chips

   - A rework of the TI Davinci framebuffer driver to allow important
     cleanups in the platform code

   - A couple of device drivers for removed ARM SoC platforms are
     removed. Most of the removals were picked up by other maintainers,
     this contains whatever was left"

* tag 'armsoc-drivers' of git://git.kernel.org/pub/scm/linux/kernel/git/soc/soc: (123 commits)
  bus: uniphier-system-bus: use devm_platform_ioremap_resource()
  soc: ti: ti_sci_pm_domains: Add support for exclusive and shared access
  dt-bindings: ti_sci_pm_domains: Add support for exclusive and shared access
  firmware: ti_sci: Allow for device shared and exclusive requests
  bus: imx-weim: remove incorrect __init annotations
  fbdev: remove w90x900/nuc900 platform drivers
  spi: remove w90x900 driver
  net: remove w90p910-ether driver
  net: remove ks8695 driver
  firmware: turris-mox-rwtm: Add sysfs documentation
  firmware: Add Turris Mox rWTM firmware driver
  dt-bindings: firmware: Document cznic,turris-mox-rwtm binding
  bus: moxtet: fix unsigned comparison to less than zero
  bus: moxtet: remove set but not used variable 'dummy'
  ARM: scoop: Use the right include
  dt-bindings: power: add Amlogic Everything-Else power domains bindings
  soc: amlogic: Add support for Everything-Else power domains controller
  fbdev: da8xx: use resource management for dma
  fbdev: da8xx-fb: drop a redundant if
  fbdev: da8xx-fb: use devm_platform_ioremap_resource()
  ...
2019-09-16 15:52:38 -07:00
Arnd Bergmann
305e503b14 spi: remove w90x900 driver
The ARM w90x900 platform is getting removed, so this driver is obsolete.

Link: https://lore.kernel.org/r/20190809202749.742267-8-arnd@arndb.de
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
2019-09-04 17:57:59 +02:00
Tomer Maimon
ace55c411b
spi: npcm-fiu: add NPCM FIU controller driver
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: Tomer Maimon <tmaimon77@gmail.com>
Link: https://lore.kernel.org/r/20190828142513.228556-3-tmaimon77@gmail.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-08-30 12:42:07 +01:00
Mauro Carvalho Chehab
9cdd273e29 spi: docs: convert to ReST and add it to the kABI bookset
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: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> # for iio
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2019-07-31 14:13:13 -06:00
Mark Brown
4343f61103 Linux 5.2-rc4
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Merge tag 'v5.2-rc4' into spi-5.3

Linux 5.2-rc4
2019-06-10 18:52:53 +01:00
Masahisa Kojima
b0823ee35c
spi: Add spi driver for Socionext SynQuacer platform
This patch adds support for controller found on synquacer platforms.

Signed-off-by: Masahisa Kojima <masahisa.kojima@linaro.org>
Signed-off-by: Jassi Brar <jaswinder.singh@linaro.org>
Reviewed-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-06-04 15:50:33 +01:00
Thomas Gleixner
ec8f24b7fa treewide: Add SPDX license identifier - Makefile/Kconfig
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: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21 10:50:46 +02:00
Florian Fainelli
35ceb6759d
spi: Allow selecting BCM2835 SPI controllers on ARCH_BRCMSTB
ARCH_BRCMSTB platforms have the BCM2835 SPI controllers (normal and
auxiliary), allow selecting the two drivers on such platforms.

Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
2019-05-13 13:14:26 +01:00
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
Mark Brown
2016d52a38 Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/lantiq-ssc', 'spi/topic/mpc52xx', 'spi/topic/ppc4xx' and 'spi/topic/pxa2xx' into spi-next 2017-02-19 16:41:01 +00:00
Mark Brown
3470650057 Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/ep93xx', 'spi/topic/falcon' and 'spi/topic/fsl-lpspi' into spi-next 2017-02-19 16:40:59 +00:00
Mark Brown
244a60c28d Merge remote-tracking branches 'spi/topic/armada', 'spi/topic/ath79', 'spi/topic/bcm-qspi' and 'spi/topic/bcm53xx' into spi-next 2017-02-19 16:40:55 +00:00
Hauke Mehrtens
582c97f686 spi: lantiq-ssc: activate under COMPILE_TEST
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>
2017-02-19 16:11:01 +00:00
Hauke Mehrtens
17f84b793c spi: lantiq-ssc: add support for Lantiq SSC SPI controller
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>
2017-02-14 17:10:40 +00:00
Hauke Mehrtens
9c6a3af003 spi: make falcon-spi bool
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>
2017-01-10 12:26:19 +00:00
Jaedon Shin
279e4af7b4 spi: bcm-qspi: Enable the driver on BMIPS_GENERIC
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>
2016-12-31 18:22:30 +00:00
Geert Uytterhoeven
dadab2d4e3 spi: SPI_FSL_DSPI should depend on HAS_DMA
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>
2016-12-14 14:37:36 +00:00
Mark Brown
6694430130 Merge remote-tracking branches 'spi/topic/orion', 'spi/topic/pxa2xx', 'spi/topic/rspi' and 'spi/topic/s3c64xx' into spi-next 2016-12-12 15:54:17 +00:00
Mark Brown
830d705f26 Merge remote-tracking branches 'spi/topic/fsl-lpspi', 'spi/topic/imx', 'spi/topic/jcore' and 'spi/topic/omap' into spi-next 2016-12-12 15:54:14 +00:00
Mark Brown
3bc1ad252d Merge remote-tracking branches 'spi/topic/delay', 'spi/topic/dw', 'spi/topic/fsl-dspi' and 'spi/topic/fsl-espi' into spi-next 2016-12-12 15:54:09 +00:00
Romain Perier
5762ab71eb spi: Add support for Armada 3700 SPI Controller
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>
2016-12-08 16:05:34 +00:00
Uwe Kleine-König
7348291058 spi: orion: fix comment to mention MVEBU
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>
2016-11-30 16:22:46 +00:00
Gao Pan
5314987de5 spi: imx: add lpspi bus driver
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>
2016-11-22 19:13:16 +00:00
Heiner Kallweit
278c48d2ab spi: fsl-espi: separate fsl-espi from fsl-lib completely
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>
2016-11-14 11:21:48 +00:00
Javier Martinez Canillas
b099b1319d spi: s3c64xx: Allow driver to build if COMPILE_TEST is enabled
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>
2016-11-09 14:05:01 +00:00
Mark Brown
3424ff29a0 Merge remote-tracking branches 'spi/topic/rspi', 'spi/topic/sc18is602', 'spi/topic/sh-msiof', 'spi/topic/spidev-test' and 'spi/topic/st-ssc4' into spi-next 2016-09-30 09:14:18 -07:00
Mark Brown
66b5a337d0 Merge remote-tracking branches 'spi/topic/octeon', 'spi/topic/pic32-sqi', 'spi/topic/pxa2xx' and 'spi/topic/qup' into spi-next 2016-09-30 09:14:14 -07:00
Mark Brown
e2df04ed3b Merge remote-tracking branches 'spi/topic/fsl-espi', 'spi/topic/imx', 'spi/topic/jcore', 'spi/topic/loopback' and 'spi/topic/meson' into spi-next 2016-09-30 09:14:10 -07:00
Kamal Dasu
fa236a7ef2 spi: bcm-qspi: Add Broadcom MSPI driver
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>
2016-09-14 18:03:32 +01:00
Geert Uytterhoeven
6ffc84dd15 spi: sh-msiof: Use ARCH_SHMOBILE instead of SUPERH
"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>
2016-09-01 20:53:52 +01:00
Jan Glauber
7347a6c7af spi: octeon: Add ThunderX driver
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>
2016-08-19 16:24:39 +01:00
Rich Felker
2cb1b3b3ac spi: add driver for J-Core SPI controller
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>
2016-08-08 11:56:32 +01:00
Franklin S Cooper Jr
2b32e987c4 spi: omap2-mcspi: Select SPI_SPLIT
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>
2016-07-08 10:47:45 +02:00
Mark Brown
c8d6a77b58 Merge remote-tracking branches 'spi/topic/pxa2xx', 'spi/topic/qup', 'spi/topic/rockchip', 'spi/topic/st-ssc4' and 'spi/topic/xlp' into spi-next 2016-05-23 12:16:55 +01:00
Mark Brown
b340941af9 Merge remote-tracking branches 'spi/topic/octeon', 'spi/topic/omap2-mcspi', 'spi/topic/orion', 'spi/topic/pic32' and 'spi/topic/pic32-qspi' into spi-next 2016-05-23 12:16:51 +01:00
Purna Chandra Mandal
21825ff11d spi: pic32-sqi: Fix linker error, undefined reference to `bad_dma_ops'.
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>
2016-05-13 11:54:28 +01:00
Axel Lin
46cb41534a spi: Drop unnecessary dependencies on relaxed I/O accessors
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>
2016-05-02 16:25:13 +01:00
Axel Lin
83fefd2d5b spi: st-ssc4: Allow compile test build
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>
2016-04-29 18:16:25 +01:00
Thomas Petazzoni
710a1d5445 spi: spi-orion: enable the driver on ARCH_MVEBU platforms
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>
2016-04-22 16:07:36 +01:00
Purna Chandra Mandal
3270ac230f spi: pic32-sqi: add SPI driver for PIC32 SQI controller.
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>
2016-04-18 17:52:46 +01:00
Purna Chandra Mandal
1bcb9f8ceb spi: spi-pic32: Add PIC32 SPI master driver
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>
2016-04-04 10:04:29 -07:00
Kamlakant Patel
bf23d1917d spi: xlp: Enable SPI driver for Broadcom Vulcan ARM64
- 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>
2016-03-23 13:37:10 +00:00
Mark Brown
c508709bcf Merge remote-tracking branches 'spi/topic/res', 'spi/topic/rockchip', 'spi/topic/sh', 'spi/topic/ti-qspi' and 'spi/topic/xilinx' into spi-next 2016-03-11 14:28:53 +07:00
Mark Brown
b9facea19b Merge remote-tracking branches 'spi/topic/lp8841', 'spi/topic/msg', 'spi/topic/pl022' and 'spi/topic/pxa2xx' into spi-next 2016-03-11 14:28:43 +07:00
Mark Brown
6beb9fecbd Merge remote-tracking branches 'spi/topic/acpi', 'spi/topic/axi-engine', 'spi/topic/bcm2835' and 'spi/topic/bcm2835aux' into spi-next 2016-03-11 14:28:25 +07:00
Sergei Ianovich
7ecbfff671 spi: master driver to enable RTC on ICPDAS LP-8841
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>
2016-02-24 13:09:08 +09:00
Simon Horman
3aec316673 spi: sh-spi, sh-msiof, rspi: Use ARCH_RENESAS
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>
2016-02-18 13:35:07 +00:00
Axel Lin
bbcfb8930e spi: bcm2835: Remove duplicate depend on GPIOLIB in Kconfig
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-13 16:28:05 +00:00
Mark Brown
fcdcc79628 Merge branch 'topic/acpi' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-pxa2xx 2016-02-09 18:20:39 +00:00
Geert Uytterhoeven
0697ae80fe spi: Allow compile test of bcm2835aux if !GPIOLIB
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>
2016-02-08 13:42:10 +00:00
Lars-Peter Clausen
b1353d1c1d spi: Add Analog Devices AXI SPI Engine controller support
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>
2016-02-05 18:12:57 +00:00
Mark Brown
e32bb8709f spi: Fix sorting in Kconfig
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-02-03 10:28:08 +00:00
Jarkko Nikula
22a33632fb spi: pxa2xx: Remove CONFIG_SPI_PXA2XX_DMA
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>
2016-01-15 18:13:17 +00:00
Mark Brown
cabeea9808 Merge remote-tracking branches 'spi/topic/sun4i', 'spi/topic/topcliff-pch' and 'spi/topic/zynq' into spi-next 2016-01-11 16:48:38 +00:00
Martin Sperl
97896195b3 spi: add spi-loopback-test to build framework
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>
2015-12-12 23:05:18 +00:00
Paul Burton
f05ca854b3 spi: topcliff-pch: allow build for MIPS platforms
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>
2015-11-30 16:34:50 +00:00
Mark Brown
fc579056af Merge remote-tracking branches 'spi/topic/fsl-dspi', 'spi/topic/mpc512x', 'spi/topic/mtk', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next 2015-11-04 11:02:10 +00:00
Mark Brown
c2da04dc21 Merge remote-tracking branches 'spi/topic/bcm53xx', 'spi/topic/bcm63xx', 'spi/topic/bfin-sport', 'spi/topic/bfin5xx' and 'spi/topic/bitbang' into spi-next 2015-11-04 11:02:06 +00:00
Yuan Yao
5a60adafb9 spi: Add DSPI support for layerscape family
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>
2015-10-30 10:25:53 +09:00
Jonas Gorski
44d8fb3094 spi/bcm63xx: move register definitions into the driver
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>
2015-10-23 01:19:58 +09:00