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path: root/drivers/spi
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2016-02-12spi: checking for NULL instead of IS_ERRDan Carpenter1-2/+2
spi_replace_transfers() returns error pointers on error, it never returns NULL. Fixes: d9f121227281 ('spi: core: add spi_split_transfers_maxsize') Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-12spi: omap2-mcspi: Fix PM regression with deferred probe for pm_runtime_reinitTony Lindgren1-0/+3
Commit 5de85b9d57ab ("PM / runtime: Re-init runtime PM states at probe error and driver unbind") introduced pm_runtime_reinit() that is used to reinitialize PM runtime after -EPROBE_DEFER. This allows shutting down the device after a failed probe. However, for drivers using pm_runtime_use_autosuspend() this can cause a state where suspend callback is never called after -EPROBE_DEFER. On the following device driver probe, hardware state is different from the PM runtime state causing omap_device to produce the following error: omap_device_enable() called from invalid state 1 And with omap_device and omap hardware being picky for PM, this will block any deeper idle states in hardware. The solution is to fix the drivers to follow the PM runtime documentation: 1. For sections of code that needs the device disabled, use pm_runtime_put_sync_suspend() if pm_runtime_set_autosuspend() has been set. 2. For driver exit code, use pm_runtime_dont_use_autosuspend() before pm_runtime_put_sync() if pm_runtime_use_autosuspend() has been set. Fixes: 5de85b9d57ab ("PM / runtime: Re-init runtime PM states at probe error and driver unbind") Cc: [email protected] Cc: Alan Stern <[email protected]> Cc: Kevin Hilman <[email protected]> Cc: Mark Brown <[email protected]> Cc: Nishanth Menon <[email protected]> Cc: Rafael J. Wysocki <[email protected]> Cc: Ulf Hansson <[email protected]> Cc: Tero Kristo <[email protected]> Signed-off-by: Tony Lindgren <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-10spi: bcm2835aux: disable tx fifo empty irqStephan Olbrich1-0/+6
The tx empty irq can be disabled when all data was copied. This prevents unnecessary interrupts while the last bytes are sent. Signed-off-by: Stephan Olbrich <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-10spi: bcm2835aux: fix bitmask definesStephan Olbrich1-2/+2
The bitmasks for txempty and idle interrupts were interchanged. Signed-off-by: Stephan Olbrich <[email protected]> Reviewed-by: Eric Anholt <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: spi-ti-qspi: add mmap mode read supportVignesh R1-29/+110
ti-qspi controller provides mmap port to read data from SPI flashes. mmap port is enabled in QSPI_SPI_SWITCH_REG. ctrl module register may also need to be accessed for some SoCs. The QSPI_SPI_SETUP_REGx needs to be populated with flash specific information like read opcode, read mode(quad, dual, normal), address width and dummy bytes. Once, controller is in mmap mode, the whole flash memory is available as a memory region at SoC specific address. This region can be accessed using normal memcpy() (or mem-to-mem dma copy). The ti-qspi controller hardware will internally communicate with SPI flash over SPI bus and get the requested data. Implement spi_flash_read() callback to support mmap read over SPI flash devices. With this, the read throughput increases from ~100kB/s to ~2.5 MB/s. Signed-off-by: Vignesh R <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: introduce accelerated read support for spi flash devicesVignesh R1-0/+45
In addition to providing direct access to SPI bus, some spi controller hardwares (like ti-qspi) provide special port (like memory mapped port) that are optimized to improve SPI flash read performance. This means the controller can automatically send the SPI signals required to read data from the SPI flash device. For this, SPI controller needs to know flash specific information like read command to use, dummy bytes and address width. Introduce spi_flash_read() interface to support accelerated read over SPI flash devices. SPI master drivers can implement this callback to support interfaces such as memory mapped read etc. m25p80 flash driver and other flash drivers can call this make use of such interfaces. The interface should only be used with SPI flashes and cannot be used with other SPI devices. Signed-off-by: Vignesh R <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: core: add spi_split_transfers_maxsizeMartin Sperl1-0/+111
Add spi_split_transfers_maxsize method that splits spi_transfers transparently into multiple transfers that are below the given max-size. This makes use of the spi_res framework via spi_replace_transfers to allocate/free the extra transfers as well as reverting back the changes applied while processing the spi_message. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: core: add spi_replace_transfers methodMartin Sperl1-0/+132
Add the spi_replace_transfers method that can get used to replace some spi_transfers from a spi_message with other transfers. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: core: added spi_resource managementMartin Sperl1-0/+91
SPI resource management framework used while processing a spi_message via the spi-core. The basic idea is taken from devres, but as the allocation may happen fairly frequently, some provisioning (in the form of an unused spi_device pointer argument to spi_res_alloc) has been made so that at a later stage we may implement reuse objects allocated earlier avoiding the repeated allocation by keeping a cache of objects that we can reuse. This framework can get used for: * rewriting spi_messages * to fullfill alignment requirements of the spi_master HW * to fullfill transfer length requirements (e.g: transfers need to be less than 64k) * consolidate spi_messages with multiple transfers into a single transfer when the total transfer length is below a threshold. * reimplement spi_unmap_buf without explicitly needing to check if it has been mapped Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: pxa2xx: Add support for both chip selects on Intel BraswellMika Westerberg1-1/+20
Intel Braswell LPSS SPI controller actually has two chip selects and there is no capabilities register where this could be found out. These two chip selects are controlled by bits which are in slightly differrent location than Broxton has. Braswell Windows driver also starts chip select (ACPI DeviceSelection) numbering from 1 so translate it to be suitable for Linux as well. Signed-off-by: Mika Westerberg <[email protected]> Reviewed-by: Jarkko Nikula <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: pxa2xx: Move chip select control bits into lpss_config structureMika Westerberg1-24/+40
Some Intel LPSS SPI controllers, like the one in Braswell has these bits in a different location so move these bits to be part of the LPSS configuration. Since not all LPSS SPI controllers support multiple native chip selects we refactor selecting chip select to its own function and check control->cs_sel_mask before switching to another chip select. Signed-off-by: Mika Westerberg <[email protected]> Reviewed-by: Jarkko Nikula <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: pxa2xx: Translate ACPI DeviceSelection to Linux chip select on BaytrailMika Westerberg1-0/+23
The Windows Baytrail SPI host controller driver uses 1 as the first (and only) value for ACPI DeviceSelection like can be seen in DSDT taken from Lenovo Thinkpad 10: Device (FPNT) { ... Method (_CRS, 0, NotSerialized) // _CRS: Current Resource Settings { Name (UBUF, ResourceTemplate () { SpiSerialBus (0x0001, // DeviceSelection PolarityLow, FourWireMode, 0x08, ControllerInitiated, 0x007A1200, ClockPolarityLow, ClockPhaseFirst, "\\_SB.SPI1", 0x00, ResourceConsumer,,) This will fail to enumerate in Linux with following error: [ 0.241296] pxa2xx-spi 80860F0E:00: cs1 >= max 1 [ 0.241312] spi_master spi32766: failed to add SPI device VFSI6101:00 from ACPI To make the Linux SPI core successfully enumerate the device we provide a custom version of ->fw_translate_cs() that translates DeviceSelection correctly. Signed-off-by: Mika Westerberg <[email protected]> Reviewed-by: Jarkko Nikula <[email protected]> Reviewed-by: Andy Shevchenko <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09Merge branch 'topic/acpi' of ↵Mark Brown25-198/+1459
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi into spi-pxa2xx
2016-02-09spi: Let drivers translate ACPI DeviceSelection to suitable Linux chip selectMika Westerberg1-1/+18
In Windows it is up to the SPI host controller driver to handle the ACPI DeviceSelection as it likes. The SPI core does not take any part in it. This is different in Linux because we always expect to have chip select in range of 0 .. master->num_chipselect - 1. In order to support this in Linux we need a way to allow the driver to translate between ACPI DeviceSelection field and Linux chip select number so provide a new optional hook ->fw_translate_cs() that can be used by a driver to handle translation and call this hook if set during SPI slave ACPI enumeration. Signed-off-by: Mika Westerberg <[email protected]> Reviewed-by: Jarkko Nikula <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-09spi: rockchip: modify DMA max burst to 1Addy Ke1-2/+10
Generic dma controller on Rockchips' platform cannot support DMAFLUSHP instruction which make dma to flush the req of non-aligned or non-multiple of what we need. That will cause an unrecoverable dma bus error. The saftest way is to set dma max burst to 1. Signed-off-by: Addy ke <[email protected]> Fixes: 64e36824b32b06 ("spi/rockchip: add driver for Rockchip...") Signed-off-by: Shawn Lin <[email protected]> cc: Heiko Stuebner <[email protected]> cc: Olof Johansson <[email protected]> cc: Doug Anderson <[email protected]> cc: Sonny Rao <[email protected]> Acked-by: Mark Brown <[email protected]> Signed-off-by: Caesar Wang <[email protected]> Signed-off-by: Vinod Koul <[email protected]>
2016-02-08spi: Allow compile test of bcm2835aux if !GPIOLIBGeert Uytterhoeven1-2/+1
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 <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-05spi: Add Analog Devices AXI SPI Engine controller supportLars-Peter Clausen3-0/+600
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 <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-05spi: dw-mmio: remove message which is handled by coreAndy Shevchenko1-5/+0
devm_ioremap_resource() validates its parameters and issues an error message if needed. Signed-off-by: Andy Shevchenko <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-05spi: dw-mid: switch to new dmaengine_terminate_* APIAndy Shevchenko1-2/+2
Convert dmaengine_terminate_all() calls to synchronous versions. Signed-off-by: Andy Shevchenko <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-04spi: pxa2xx: Fix too early chipselect deassertJarkko Nikula1-0/+7
There is a chance that chipselect is deasserted too early while the last clock cycle is still running. Protocol analyzers will see this as a failed last byte. This is more likely to occur with slow bitrates, for instance at 25 kbps. Reason for this is when using SPI mode 0 that both SPI host controller and SPI slave will drive the data lines at the falling edge of clock signal and sample at the rising edge. Receive FIFO gets the last bit now at the rising edge and code sees transfer to be finished either by the interrupt in PIO mode or by the DMA completion in DMA mode. The SSP Time Out register SSTO should take care of delaying the completion but it does not seems to have effect at least on Intel Skylake and Broxton even when using long enough values. Depending on timing code may get into point where chipselect is deasserted while the last clock cycle is still running at its second half cycle. Fix this by adding a wait loop in giveback() that waits until SSP becomes idle before deasserting the chipselect. Reported-by: Weifeng Voon <[email protected]> Signed-off-by: Jarkko Nikula <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-04spi: pxa2xx: Update comment in int_transfer_complete()Jarkko Nikula1-1/+1
The register writes here actually don't stop the SSP but clean and disable interrupts and set the receive FIFO inactivity timeout to zero. Signed-off-by: Jarkko Nikula <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-02-03spi: Fix sorting in KconfigMark Brown1-32/+32
Signed-off-by: Mark Brown <[email protected]>
2016-01-28spi: atmel: fix gpio chip-select in case of non-DT platformCyrille Pitchen1-0/+1
The non-DT platform that uses this driver (actually the AVR32) was taking a bad branch for determining if the IP would use gpio for CS. Adding the presence of DT as a condition fixes this issue. Fixes: 4820303480a1 ("spi: atmel: add support for the internal chip-select of the spi controller") Reported-by: Mans Rullgard <[email protected]> Signed-off-by: Cyrille Pitchen <[email protected]> [[email protected]: extract from ml discussion] Signed-off-by: Nicolas Ferre <[email protected]> Tested-by: Mans Rullgard <[email protected]> Signed-off-by: Mark Brown <[email protected]> Cc: [email protected]
2016-01-27spi: pxa2xx: Print actual DMA/PIO transfer mode in debug messagesJarkko Nikula1-13/+13
Transfer debug messages don't actually show is the transfer really using DMA. Driver may fall back to PIO in case transfer size is not within the certain limits or fails to map DMA buffers but debug messages don't reveal that. Move these debug messages further in pump_transfers() where the actual transfer mode is known and use drv_data->dma_mapped flag instead of chip->enable_dma for printing the mode. Signed-off-by: Jarkko Nikula <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-22spi/fsl-espi: Correct the maximum transaction lengthHou Zhiqiang1-2/+2
The maximum length during one transcation is 64KiB. Signed-off-by: Hou Zhiqiang <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-22spi: imx: fix spi resource leak with dma transferGao Pan1-3/+5
In spi_imx_dma_transfer(), when desc_rx = dmaengine_prep_slave_sg() fails, the context goes to label no_dma and then return. However, the memory allocated for desc_tx has not been freed yet, which leads to resource leak. Signed-off-by: Gao Pan <[email protected]> Reviewed-by: Fugang Duan <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-15Merge tag 'powerpc-4.5-1' of ↵Linus Torvalds1-1/+1
git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux Pull powerpc updates from Michael Ellerman: "Core: - Ground work for the new Power9 MMU from Aneesh Kumar K.V - Optimise FP/VMX/VSX context switching from Anton Blanchard Misc: - Various cleanups from Krzysztof Kozlowski, John Ogness, Rashmica Gupta, Russell Currey, Gavin Shan, Daniel Axtens, Michael Neuling, Andrew Donnellan - Allow wrapper to work on non-english system from Laurent Vivier - Add rN aliases to the pt_regs_offset table from Rashmica Gupta - Fix module autoload for rackmeter & axonram drivers from Luis de Bethencourt - Include KVM guest test in all interrupt vectors from Paul Mackerras - Fix DSCR inheritance over fork() from Anton Blanchard - Make value-returning atomics & {cmp}xchg* & their atomic_ versions fully ordered from Boqun Feng - Print MSR TM bits in oops messages from Michael Neuling - Add TM signal return & invalid stack selftests from Michael Neuling - Limit EPOW reset event warnings from Vipin K Parashar - Remove the Cell QPACE code from Rashmica Gupta - Append linux_banner to exception information in xmon from Rashmica Gupta - Add selftest to check if VSRs are corrupted from Rashmica Gupta - Remove broken GregorianDay() from Daniel Axtens - Import Anton's context_switch2 benchmark into selftests from Michael Ellerman - Add selftest script to test HMI functionality from Daniel Axtens - Remove obsolete OPAL v2 support from Stewart Smith - Make enter_rtas() private from Michael Ellerman - PPR exception cleanups from Michael Ellerman - Add page soft dirty tracking from Laurent Dufour - Add support for Nvlink NPUs from Alistair Popple - Add support for kexec on 476fpe from Alistair Popple - Enable kernel CPU dlpar from sysfs from Nathan Fontenot - Copy only required pieces of the mm_context_t to the paca from Michael Neuling - Add a kmsg_dumper that flushes OPAL console output on panic from Russell Currey - Implement save_stack_trace_regs() to enable kprobe stack tracing from Steven Rostedt - Add HWCAP bits for Power9 from Michael Ellerman - Fix _PAGE_PTE breaking swapoff from Aneesh Kumar K.V - Fix _PAGE_SWP_SOFT_DIRTY breaking swapoff from Hugh Dickins - scripts/recordmcount.pl: support data in text section on powerpc from Ulrich Weigand - Handle R_PPC64_ENTRY relocations in modules from Ulrich Weigand cxl: - cxl: Fix possible idr warning when contexts are released from Vaibhav Jain - cxl: use correct operator when writing pcie config space values from Andrew Donnellan - cxl: Fix DSI misses when the context owning task exits from Vaibhav Jain - cxl: fix build for GCC 4.6.x from Brian Norris - cxl: use -Werror only with CONFIG_PPC_WERROR from Brian Norris - cxl: Enable PCI device ID for future IBM CXL adapter from Uma Krishnan Freescale: - Freescale updates from Scott: Highlights include moving QE code out of arch/powerpc (to be shared with arm), device tree updates, and minor fixes" * tag 'powerpc-4.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux: (149 commits) powerpc/module: Handle R_PPC64_ENTRY relocations scripts/recordmcount.pl: support data in text section on powerpc powerpc/powernv: Fix OPAL_CONSOLE_FLUSH prototype and usages powerpc/mm: fix _PAGE_SWP_SOFT_DIRTY breaking swapoff powerpc/mm: Fix _PAGE_PTE breaking swapoff cxl: Enable PCI device ID for future IBM CXL adapter cxl: use -Werror only with CONFIG_PPC_WERROR cxl: fix build for GCC 4.6.x powerpc: Add HWCAP bits for Power9 powerpc/powernv: Reserve PE#0 on NPU powerpc/powernv: Change NPU PE# assignment powerpc/powernv: Fix update of NVLink DMA mask powerpc/powernv: Remove misleading comment in pci.c powerpc: Implement save_stack_trace_regs() to enable kprobe stack tracing powerpc: Fix build break due to paca mm_context_t changes cxl: Fix DSI misses when the context owning task exits MAINTAINERS: Update Scott Wood's e-mail address powerpc/powernv: Fix minor off-by-one error in opal_mce_check_early_recovery() powerpc: Fix style of self-test config prompts powerpc/powernv: Only delay opal_rtc_read() retry when necessary ...
2016-01-15spi: fix counting in spi-loopback-test codeArnd Bergmann1-0/+1
These variables are always used uninitialized: drivers/spi/spi-loopback-test.c: In function 'spi_test_run_iter': drivers/spi/spi-loopback-test.c:768:17: warning: 'rx_count' may be used uninitialized in this function [-Wmaybe-uninitialized] drivers/spi/spi-loopback-test.c:762:17: warning: 'tx_count' may be used uninitialized in this function [-Wmaybe-uninitialized] Adding an explicit initialization seems to be the only workable solution here, to make the code behave correctly and build without warning. Fixes: 84e0c4e5e2c4 ("spi: add loopback test driver to allow for spi_master regression tests") Signed-off-by: Arnd Bergmann <[email protected]> Acked-by: Geert Uytterhoeven <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-15spi: pxa2xx: Remove CONFIG_SPI_PXA2XX_DMAJarkko Nikula3-41/+1
After removal of legacy PXA DMA code by the commit 6356437e65c2 ("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 <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-13Merge tag 'spi-v4.5' of ↵Linus Torvalds23-177/+1387
git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi Pull spi updates from Mark Brown: "A quiet release for SPI, not even many driver updates: - Add a dummy loopback driver for use in exercising framework features during development. - Move the test utilities to tools/ and add support for transferring data to and from a file instead of stdin and stdout to spidev_test. - Support for Mediatek MT2701 and Renesas AG5 deices" * tag 'spi-v4.5' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (69 commits) spi: loopback: fix typo in MODULE_PARM_DESC spi: sun4i: Prevent chip-select from being activated twice before a transfer spi: loopback-test: spi_check_rx_ranges can get always done spi: loopback-test: rename method spi_test_fill_tx to spi_test_fill_pattern spi: loopback-test: write rx pattern also when running without tx_buf spi: fsl-espi: expose maximum transfer size limit spi: expose master transfer size limitation. spi: zynq: use to_platform_device() spi: cadence: use to_platform_device() spi: mediatek: Add spi support for mt2701 IC spi: mediatek: merge all identical compat to mtk_common_compat spi: mtk: Add bindings for mediatek MT2701 soc platform spi: mediatek: Prevent overflows in FIFO transfers spi: s3c64xx: Remove unused platform_device_id entries spi: use to_spi_device spi: dw: Use SPI_TMOD_TR rather than magic const 0 to set tmode spi: imx: defer spi initialization, if DMA engine is spi: imx: return error from dma channel request spi: imx: enable loopback only for ECSPI controller family spi: imx: fix loopback mode setup after controller reset ...
2016-01-11Merge remote-tracking branches 'spi/topic/sun4i', 'spi/topic/topcliff-pch' ↵Mark Brown4-15/+11
and 'spi/topic/zynq' into spi-next
2016-01-11Merge remote-tracking branches 'spi/topic/overlay', 'spi/topic/pxa2xx', ↵Mark Brown4-30/+37
'spi/topic/s3c64xx', 'spi/topic/sh-msiof' and 'spi/topic/spidev' into spi-next
2016-01-11Merge remote-tracking branches 'spi/topic/lm70llp', 'spi/topic/loopback', ↵Mark Brown7-45/+1216
'spi/topic/mtk' and 'spi/topic/omap2-mcspi' into spi-next
2016-01-11Merge remote-tracking branches 'spi/topic/dw', 'spi/topic/dw-mid', ↵Mark Brown5-37/+76
'spi/topic/fsl-espi' and 'spi/topic/imx' into spi-next
2016-01-11Merge remote-tracking branches 'spi/topic/bcm63xx', 'spi/topic/butterfly', ↵Mark Brown4-35/+25
'spi/topic/cadence' and 'spi/topic/davinci' into spi-next
2016-01-11Merge remote-tracking branch 'spi/topic/sunxi' into spi-nextMark Brown1-3/+3
2016-01-11Merge remote-tracking branch 'spi/topic/core' into spi-nextMark Brown1-2/+1
2016-01-11Merge remote-tracking branch 'spi/fix/mtk' into spi-linusMark Brown1-10/+18
2016-01-08spi: loopback: fix typo in MODULE_PARM_DESCDan Carpenter1-1/+1
There should be an 's' on "dump_message" so it matches the module_param. Fixes: 84e0c4e5e2c4 ('spi: add loopback test driver to allow for spi_master regression tests') Signed-off-by: Dan Carpenter <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-07spi: sun4i: Prevent chip-select from being activated twice before a transferMarcus Weseloh1-3/+3
The SPI core calls set_cs before a transfer, but the SUN4I_CTL_CS_MANUAL flag is only set in transfer_one. This leads to the following pattern on the chip-select line (with runtime power-management on every transfer, without it only on the first one): activate, deactivate, activate, transfer, deactivate Moving the configuration of the SUN4I_CTL_CS_MANUAL flag from transfer_one to set_cs removes the double activation. Signed-off-by: Marcus Weseloh <[email protected]> Acked-by: Maxime Ripard <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-05spi: loopback-test: spi_check_rx_ranges can get always doneMartin Sperl1-5/+14
The spi_check_rx_ranges can always get executed independent of if we have a real loopback situation. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-05spi: loopback-test: rename method spi_test_fill_tx to spi_test_fill_patternMartin Sperl1-3/+4
Rename method spi_test_fill_tx to spi_test_fill_pattern to better describe what it does. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-05spi: loopback-test: write rx pattern also when running without tx_bufMartin Sperl1-4/+4
Currently the rx_buf does not get set with the SPI_TEST_PATTERN_UNWRITTEN when tx_buf == NULL in the transfer. Reorder code so that it gets done also under this specific condition. Signed-off-by: Martin Sperl <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-05spi: fsl-espi: expose maximum transfer size limitMichal Suchanek1-0/+6
The fsl-espi hardware can trasfer at most 64K data so report teh limitation. Based on patch by Heiner Kallweit <[email protected]> CC: Heiner Kallweit <[email protected]> Signed-off-by: Michal Suchanek <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-05spi: zynq: use to_platform_device()Geliang Tang1-6/+2
Use to_platform_device() instead of open-coding it. Signed-off-by: Geliang Tang <[email protected]> Reviewed-by: Moritz Fischer <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-05spi: cadence: use to_platform_device()Geliang Tang1-4/+2
Use to_platform_device() instead of open-coding it. Signed-off-by: Geliang Tang <[email protected]> Reviewed-by: Moritz Fischer <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2016-01-01ACPI / spi: attach GPIO IRQ from ACPI description to SPI deviceChristophe RICARD1-0/+3
spi->irq was ignoring GpioInt property setting it to -1. acpi_dev_gpio_irq_get returns and configure the slave IRQ according to the ACPI slave node description. It is now inline with devicetree behavior. Acked-by: Mark Brown <[email protected]> Signed-off-by: Christophe Ricard <[email protected]> Acked-by: Mika Westerberg <[email protected]> Signed-off-by: Rafael J. Wysocki <[email protected]>
2015-12-31spi: mediatek: Add spi support for mt2701 ICLeilk Liu1-0/+3
This patch adds spi support for mt2701 IC. Signed-off-by: Leilk Liu <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-12-31spi: mediatek: merge all identical compat to mtk_common_compatLeilk Liu1-5/+10
This patch merge all identical compat into on mtk_common_compat and used for all compatible soc. Signed-off-by: Leilk Liu <[email protected]> Reviewed-by: Matthias Brugger <[email protected]> Signed-off-by: Mark Brown <[email protected]>
2015-12-30spi: mediatek: Prevent overflows in FIFO transfersNicolas Boichat1-10/+18
In the case where transfer length is not a multiple of 4, KASAN reports 2 out-of-bounds memory accesses: - mtk_spi_interrupt: ioread32_rep writes past the end of trans->rx_buf. - mtk_spi_fifo_transfer: iowrite32_rep reads past the end of xfer->tx_buf. Fix this by using memcpy on the remainder of the bytes. Signed-off-by: Nicolas Boichat <[email protected]> Signed-off-by: Mark Brown <[email protected]>
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