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path: root/drivers/spi/Kconfig
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2019-02-19spi: sifive: Add driver for the SiFive SPI controllerYash Shah1-0/+6
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>
2019-01-28spi: Kconfig: imx: Update the help text to make it more genericFabio Estevam1-2/+1
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>
2019-01-28spi: spi-mem: Add driver for NXP FlexSPI controllerYogesh Narayan Gaur1-0/+10
- 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>
2019-01-17spi: ath79: Enable support for compile testAlban Bedel1-1/+1
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>
2019-01-17spi: ath79: Simplify ath79_spi_chipselect()Alban Bedel1-1/+1
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>
2019-01-07spi: fix typo in SPI_STM32 help textCezary Gapinski1-1/+1
Fix typo from STMicroelectonics to STMicroelectronics. Signed-off-by: Cezary Gapinski <cezary.gapinski@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2019-01-07spi: add cpu details to fsl-dspi Kconfig helpAngelo Dureghello1-1/+1
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>
2019-01-07spi: Add a driver for the Freescale/NXP QuadSPI controllerFrieder Schrempf1-0/+11
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>
2018-12-20Merge remote-tracking branches 'spi/topic/mem' and 'spi/topic/mtd' into spi-nextMark Brown1-0/+9
2018-12-11mtd: atmel-quadspi: disallow building on ebsa110Arnd Bergmann1-1/+1
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: 161aaab8a067 ("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
2018-11-13spi: npcm: add NPCM PSPI controller driverTomer Maimon1-0/+7
Add Nuvoton NPCM BMC Peripheral SPI controller driver. Signed-off-by: Tomer Maimon <tmaimon77@gmail.com> Signed-off-by: Mark Brown <broonie@kernel.org>
2018-11-07spi: Kconfig: Enable McSPI driver for K3 platformsVignesh R1-1/+1
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>
2018-11-07spi: Add QuadSPI driver for Atmel SAMA5D2Piotr Bugalski1-0/+9
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>
2018-11-05spi: Add MXIC controller driverMason Yang1-0/+6
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>
2018-10-25Merge tag 'mfd-next-4.20' of ↵Linus Torvalds1-0/+8
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 ...
2018-10-21spi: Allow building SPI_BCM63XX_HSSPI on ARM-based SoCsFlorian Fainelli1-1/+1
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>
2018-10-19spi: spi-mem: add stm32 qspi controllerLudovic Barre1-0/+9
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>
2018-10-11spi: spi-geni-qcom: Add SPI driver support for GENI based QUPGirish Mahadevan1-0/+12
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>
2018-10-11spi: Introduce new driver for Qualcomm QuadSPI controllerGirish Mahadevan1-0/+6
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>
2018-09-28spi: mediatek: add spi slave for Mediatek MT2712Leilk Liu1-0/+10
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>
2018-09-10spi: at91-usart: Add driver for at91-usart as SPIRadu Pirea1-0/+8
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>
2018-08-28spi: sprd: Add SPI driver for Spreadtrum SC9860Lanqing Liu1-0/+6
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>
2018-08-01spi: add SPI controller driver for UniPhier SoCKeiji Hayashibara1-0/+13
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>
2018-05-31spi: Fix typo on SPI_MEM help textFabio Estevam1-1/+1
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>
2018-05-11spi: Extend the core to ease integration of SPI memory controllersBoris Brezillon1-0/+7
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>
2018-05-10spi: remove forgotten CONFIG_SPI_BCM53XXRafał Miłecki1-8/+0
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>
2018-04-18spi: Remove depends on HAS_DMA in case of platform dependencyGeert Uytterhoeven1-9/+3
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>
2018-03-26spi: remove blackfin related host driversArnd Bergmann1-19/+0
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>
2018-03-26treewide: simplify Kconfig dependencies for removed archsArnd Bergmann1-2/+2
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>
2017-11-11Merge remote-tracking branches 'spi/topic/sh-msiof', 'spi/topic/slave', ↵Mark Brown1-4/+7
'spi/topic/spreadtrum' and 'spi/topic/tegra114' into spi-next
2017-11-03spi: spi-fsl-dspi: enabling Coldfire mcf5441x dspiAngelo Dureghello1-1/+1
Signed-off-by: Angelo Dureghello <angelo@sysam.it> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-10-05spi: spreadtrum adi: add hwspinlock dependencyArnd Bergmann1-0/+1
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: 7e2903cb91df ("spi: Add ADI driver for Spreadtrum platform") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Mark Brown <broonie@kernel.org>
2017-09-20spi: Kconfig: Remove old comments now that SPI slave is supportedFabio Estevam1-4/+0
Since commit 6c364062bfed ("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>
2017-09-19spi: Add ADI driver for Spreadtrum platformBaolin Wang1-0/+6
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>
2017-09-04Merge remote-tracking branches 'spi/topic/pxa', 'spi/topic/pxa2xx', ↵Mark Brown1-2/+2
'spi/topic/qup', 'spi/topic/rockchip' and 'spi/topic/sh' into spi-next
2017-08-16spi: altera: Switch to SPI core transfer queue managementLars-Peter Clausen1-1/+0
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>
2017-08-07spi: fix building SPI_PXA on MMPArnd Bergmann1-2/+2
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>
2017-07-03Merge remote-tracking branches 'spi/topic/spidev', 'spi/topic/st-ssc4' and ↵Mark Brown1-0/+10
'spi/topic/stm32' into spi-next
2017-07-03Merge remote-tracking branches 'spi/topic/loopback', ↵Mark Brown1-0/+7
'spi/topic/meson-spicc', 'spi/topic/mtk' and 'spi/topic/omap2-mcspi' into spi-next
2017-07-03Merge remote-tracking branch 'spi/topic/master' into spi-nextMark Brown1-1/+25
2017-06-21spi: add driver for STM32 SPI controllerAmelie Delaunay1-0/+10
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>
2017-05-26spi: slave: Add SPI slave handler controlling system stateGeert Uytterhoeven1-0/+6
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>
2017-05-26spi: slave: Add SPI slave handler reporting uptime at previous messageGeert Uytterhoeven1-0/+6
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>
2017-05-26spi: core: Add support for registering SPI slave controllersGeert Uytterhoeven1-1/+13
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>
2017-05-24spi: Add Meson SPICC driverNeil Armstrong1-0/+7
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>
2017-05-14spi: SPI_TI_QSPI should depend on HAS_DMAGeert Uytterhoeven1-0/+1
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>
2017-04-26Merge remote-tracking branches 'spi/topic/ti-qspi' and 'spi/topic/xlp' into ↵Mark Brown1-1/+1
spi-next
2017-03-13spi: xlp: update for ARCH_VULCAN2Jayachandran C1-1/+1
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>
2017-02-19Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/lantiq-ssc', ↵Mark Brown1-0/+8
'spi/topic/mpc52xx', 'spi/topic/ppc4xx' and 'spi/topic/pxa2xx' into spi-next
2017-02-19Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/ep93xx', ↵Mark Brown1-1/+1
'spi/topic/falcon' and 'spi/topic/fsl-lpspi' into spi-next
generated by cgit v1.2.3 (git 2.39.0) at 2024-11-07 08:29:49 +0300