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| | * | spi/pxa2xx: add support for DMA engineMika Westerberg2013-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | To be able to use DMA with this driver on non-PXA platforms we implement support for the generic DMA engine API. This lets user to use different DMA engines with little or no modification to the driver. Request lines and channel numbers can be passed to the driver from the platform specific data. The DMA engine implementation will be selected by default even on PXA platform. User can select the legacy DMA API by enabling Kconfig option CONFIG_SPI_PXA2XX_PXADMA. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Lu Cao <lucao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx: break out the private DMA API usage into a separate fileMika Westerberg2013-02-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PXA SPI driver uses PXA platform specific private DMA implementation which does not work on non-PXA platforms. In order to use this driver on other platforms we break out the private DMA implementation into a separate file that gets compiled only when CONFIG_SPI_PXA2XX_PXADMA is set. The DMA functions are stubbed out if there is no DMA implementation selected (i.e we are building on non-PXA platform). While we are there we can kill the dummy DMA bits in pxa2xx_spi.h as they are not needed anymore for CE4100. Once this is done we can add the generic DMA engine support to the driver that allows usage of any DMA controller that implements DMA engine API. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Lu Cao <lucao@marvell.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | | spi/ath79: add shutdown handlerGabor Juhos2013-02-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SPI controller of the AR7xxx/AR9xxx SoCs have a special mode which allows the SoC to directly read data from SPI flash chips. In this mode, the content of the SPI flash chip can be accessed via a memory mapped region. During early init time, the kernel expects that the flash chip is accessible through that memory region because it reads board specific values (e.g. MAC address, WiFi calibration data) from the flash on various boards. This is working if the kernel is loaded directly by the bootloader because that leaves the SPI controller in the special mode. However it is not working in a kexec'd kernel because the SPI driver does not restore the special mode during shutdown. The patch adds a shutdown handler to fix this issue. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/mips-lantiq: set SPI_MASTER_HALF_DUPLEX flagJohn Crispin2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Due to hardware limitations of the spi/flash frontend of the EBU we need to set the SPI_MASTER_HALF_DUPLEX flag. Signed-off-by: Thomas Langer <thomas.langer@lantiq.com> Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/mips-lantiq: make use of spi_finalize_current_messageJohn Crispin2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Rather than calling m->complete() directly we choose the sane way and call spi_finalize_current_message instead. Signed-off-by: Thomas Langer <thomas.langer@lantiq.com> Signed-off-by: John Crispin <blogic@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/bcm63xx: work around inability to keep CS upJonas Gorski2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This SPI controller does not support keeping CS asserted after sending a transfer. Since messages expected on this SPI controller are rather short, we can work around it for normal use cases by sending all transfers at once in a big full duplex stream. This means that we cannot change the speed between transfers if they require CS to be kept asserted, but these would have been rejected before anyway because of the inability of keeping CS asserted. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/davinci: use request_threaded_irq() to fix deadlockMurali Karicheri2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | With RT pre-empt patch applied to Linux kernel, the irq handler will be force converted to an irq thread. spi driver can get back to back messages from the slave device. In such cases, IRQ thread doesn't get a chance to run to read the slave data. Hence the irq handler must be run in hard irq context to read/write data from slave device. Otherwise, the kernel goes into a deadlock. This patch fixes this issue when PREEMPT_RT_FULL is enabled in the kernel. A dummy thread function is provided to satisfy the request_threaded_irq() API. Passing a NULL for function also causes the irq handler to be executed in the thread context. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/orion: Use module_platform_driver()Ezequiel Garcia2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch reduces and simplifies initalization code by using module_platform_driver(). With this change it's necessary to remove the __init annotation to avoid section mismatch warnings. Signed-off-by: Ezequiel Garcia <ezequiel.garcia@free-electrons.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/bcm63xx: reject transfers unable to transferJonas Gorski2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The hardware does not support keeping CS asserted after sending one FIFO buffer worth of data, so reject transfers requiring CS being kept asserted, either between transers or for a certain time after it, or exceeding the FIFO size. Signed-off-by: Jonas Gorski <jogo@openwrt.org> Acked-by: Florian Fainelli <florian@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi: Ensure memory used for spi_write_then_read() is DMA safeMark Brown2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use GFP_DMA in order to ensure that the memory we allocate for transfers in spi_write_then_read() can be DMAed. On most platforms this will have no effect. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/spi-mpc512x-psc: init mode bits supported by the driverAnatolij Gustschin2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver should setup mode bits it supports, otherwise adding an SPI device might fail even if the driver supports the requested SPI mode. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/mpc512x-psc: don't use obsolet cell-index propertyAnatolij Gustschin2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Remove deprecated cell-index property and use spi alias to obtain the SPI PSC number used for SPI bus id. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi: Remove erroneous __init, __exit and __exit_p() references in driversGrant Likely2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Some of the spi driver module remove hooks were annotated with __exit and referenced with __exit_p(). Presumably these were supposed to be __devinit, __devexit and __devexit_p() since __init/__exit for a probe/remove hook has never been correct. They also got missed during the big __devinit/__devexit purge since they didn't match the pattern. Remove then now to be rid of it. v2: purge __init also Reported-by: Arnd Bergmann <arnd@arndb.de> [Arnd set a patch cleaning up one, and then I found more] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/s3c64xx: fix checkpatch warnings and errorJingoo Han2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix checkpatch warnings and error as below: ERROR: "foo * bar" should be "foo *bar" WARNING: please, no space before tabs WARNING: quoted string split across lines WARNING: msleep < 20ms can sleep for up to 20ms; see Documentation/timers/timers-howto.txt Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/s3c64xx: Use devm_clk_get() and devm_request_irq()Jingoo Han2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Use devm_clk_get() and devm_request_irq() rather than clk_get() and request_irq() to make cleanup paths more simple. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/imx: Add MODULE_ALIAS()Fabio Estevam2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add an entry for MODULE_ALIAS(). Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/tegra: remove checks for valid speedLaxman Dewangan2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | SPI core make sure that all transfer has proper speed set before calling low level spi transfer. Hence, it is not require to have check in spi driver. Remove the check for speed validity from transfer and use it directly. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi: make sure all transfer has proper speed setLaxman Dewangan2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When spi client does the spi transfer and if it does not set the speed for each transfer then set it as default of spi device in spi core before calling low level transfer. This will remove the extra check in low level driver for setting speed. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/ath79: avoid multiple initialization of the SPI controllerGabor Juhos2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently we are initializing the SPI controller in the chip select line function, and that function is called once for each SPI device on the bus. If a board has multiple SPI devices, the controller will be initialized multiple times. Introduce ath79_spi_{en,dis}able helper functions, and call those from probe/response in order to avoid the mutliple initialization of the controller. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/ath79: use gpio_request_oneGabor Juhos2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Use gpio_request_one() instead of multiple gpiolib calls. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/ath79: remove superfluous chip select codeGabor Juhos2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The spi_bitbang driver calls the chipselect function of the driver from spi_bitbang_setup in order to deselect the given SPI chip, so we don't have to initialize the CS line here. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/ath79: add missing HIGH->LOW SCK transitionGabor Juhos2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The 'ath79_spi_txrx_mode0' function does not set the SCK signal to LOW at the end of a word transfer. This causes communications errors with certain devices (e.g. the PCF2123 RTC chip). The patch ensures that the SCK signal will be LOW. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/ath79: add delay between SCK changesGabor Juhos2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The driver uses the "as fast as it can" approach to drive the SCK signal. However this does not work with certain low speed SPI chips (e.g. the PCF2123 RTC chip). The patch adds per-bit slowdowns in order to be able to use the driver with such chips as well. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | mxs/spi: clear XFER_COUNT in ctrl0 field in DMA descriptorJuha Lumme2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | On MX23 the XFER_COUNT part in ctrl0 field in DMA descriptor was improperly OR'd during the construction of DMA descriptor chain, instead of being freshly set. Because of that too many bytes were being expected from SPI during the last DMA cycle. This caused a timeout (SSP_TIMEOUT) to happen in the processing of the last DMA descriptor, and thus reads and writes were failing. This is a fix for the problem, by clearing XFER_COUNT bytes in ctrl0 before setting the new XFER_COUNT for DMA descriptor. Signed-off-by: Juha Lumme <juha.lumme@gmail.com> Acked-by: Marek Vasut <marex@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/sirf: add support for new SiRFmarco SMP SoCBarry Song2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | the driver is also compatible with SiRFmarco except SiRFprimaII, so simply add "sirf,marco-spi" to OF match table. Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | spi/sirf: use clk_prepare_enable and clk_disable_unprepareBarry Song2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert clk_enable/clk_disable to clk_prepare_enable/clk_disable_unprepare calls as required by common clock framework. Signed-off-by: Barry Song <Baohua.Song@csr.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | | Merge branch 'broonie/spi-next' of ↵Grant Likely2013-02-05
| |\| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/broonie/misc.git Minor features and bug fixes for PXA, OMAP and GPIO deivce drivers and a cosmetic change to the bitbang driver. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | * | spi: spi-omap2-mcspi.c: Toggle CS after each wordMatthias Brugger2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch allows the board code to define SPI devices which needs to toggle the chip select after every word send. This is needed to get a better resolution reading e.g. an ADC data stream. Apart from that, as in the normal code CS is controlled by software, a transfer is done much faster. Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi: spi-omap2-mcspi.c: fix coding styleMatthias Brugger2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes some indentation errors. Signed-off-by: Matthias Brugger <matthias.bgg@gmail.com> Reviewed-by: Jarkko Nikula <jarkko.nikula@bitmer.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi: spi-gpio: Add checks for the dt propertiesMaxime Ripard2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The bindings assumed that the gpios properties were always there, which made the NO_TX and NO_RX mode not usable from device tree. Add extra checks to make sure that the driver can work if either MOSI or MISO is not used. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx: convert to the common clk frameworkMika Westerberg2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Convert clk_enable() to clk_prepare_enable() and clk_disable() to clk_disable_unprepare() respectively in order to support the common clk framework. Otherwise we get warnings on the console as the clock is not prepared before it is enabled. In addition we must cache the maximum clock rate to drv_data->max_clk_rate at probe time because clk_get_rate() cannot be called in tasklet context. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx: convert to the pump message infrastructureMika Westerberg2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The SPI core provides infrastructure for standard message queueing so use that instead of handling everything in the driver. This simplifies the driver. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Acked-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx: fix warnings when compiling a 64-bit kernelMika Westerberg2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fix following warnings seen when compiling 64-bit: drivers/spi/spi-pxa2xx.c: In function ‘map_dma_buffers’: drivers/spi/spi-pxa2xx.c:384:7: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] drivers/spi/spi-pxa2xx.c:384:40: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] drivers/spi/spi-pxa2xx.c: In function ‘pxa2xx_spi_probe’: drivers/spi/spi-pxa2xx.c:1572:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] drivers/spi/spi-pxa2xx.c:1572:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] drivers/spi/spi-pxa2xx.c:1572:34: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast] drivers/spi/spi-pxa2xx.c:1572:27: warning: cast to pointer from integer of different size [-Wint-to-pointer-cast] Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx: allow building on a 64-bit kernelMika Westerberg2013-01-26
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | We are going to use it on 64-bit kernel on Intel Lynxpoint so make sure we can build it into such kernel. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi: bitbang: simplify pointer arithmeticsGuennadi Liakhovetski2013-01-13
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a pointer variable to make spi_bitbang_start() look simpler. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx: embed the ssp_device to platform dataMika Westerberg2013-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The spi-pxa2xx-pci glue driver had to implement pxa_ssp_request()/free() in order to support the spi-pxa2xx platform driver. Since the ACPI enabled platforms can use the same platform driver we would need to implement pxa_ssp_request()/free() in some central place that can be shared by the ACPI and PCI glue code. Instead of doing that we can make pxa_ssp_request()/free() to be available only when CONFIG_ARCH_PXA is set. On other arches these are being stubbed out in preference to passing the ssp_device from the platform data directly. We also change the SPI bus number to be taken from ssp->port_id instead of platform device id. This way the supporting code that passes the ssp can decide the number (or it can set it to the same as pdev->id). Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/pxa2xx-pci: switch to use pcim_* interfacesMika Westerberg2013-01-08
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Instead of open-coding all the error management in the driver we can take advantage of the pcim_* interfaces that release the resources automatically. We also use platform_device_register_full() to register the platform device because it allows us to create and register the platform device at one go, simplifying the error management. This a preparatory step for getting rid of pxa_ssp_request()/free() which we will do in the next patch. Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| | * | spi/s3c64xx: Complain if we fail to set a transfer speedMark Brown2013-01-08
| | |/ | | | | | | | | | Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | spi: remove check for bits_per_word on transfer from low level driverLaxman Dewangan2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The spi core make sure that each transfer structure have the proper setting for bits_per_word before calling low level transfer APIs. Hence it is no more require to check again in low level driver for this field whether this is set correct or not. Removing such code from low level driver. The txx9 change also removes a test for bits_per_word set to 0, and forcing it to 8 in that case. This can also be removed now since spi_setup() ensures spi->bits_per_word is not zero. if (!spi->bits_per_word) spi->bits_per_word = 8; Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | spi/of: Use DT aliases for assigning bus numberGrant Likely2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Linux assigns a number to each spi_master in the system, but when the platform used the device tree, the numbers are dynamically assigned and are not predictable. In general this shouldn't matter since the kernel doesn't use the bus number for anything other than matching a bus to spi_boardinfo (not used for DT). However, sometimes userspace needs to figure out which bus is which, so it makes sense to use the global /aliases namespace to choose a specific bus number. It is safe to derive the bus number from an alias because aliases will never cause two buses to try and use the same bus number. (At one time the cell-index property was used for this purpose, but cell-index has the risk of an id collision). Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Anatolij Gustschin <agust@denx.de> Cc: Mark Brown <broonie@opensource.wolfsonmicro.com>
| * | spi/sh-msiof: Add device tree parsing to driverBastian Hecht2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | This adds the capability to retrieve setup data from the device tree node. The usage of platform data is still available. Signed-off-by: Bastian Hecht <hechtb+renesas@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | spi/davinci: add OF support for the spi controllerMurali Karicheri2013-02-05
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds OF support to DaVinci SPI controller to configure platform data through device bindings. Also replaces clk_enable() with of clk_prepare_enable() as well as clk_disable() with clk_disable_unprepare(). Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| * | spi/omap2: disable DMA requests before complete()Felipe Balbi2013-02-05
| |/ | | | | | | | | | | | | | | | | | | | | No actual errors have been found for completing before disabling DMA request lines, but it just looks more semantically correct that on our DMA callback we quiesce the whole thing before stating transfer is finished. Signed-off-by: Felipe Balbi <balbi@ti.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* / sched/rt: Move rt specific bits into new header fileClark Williams2013-02-07
|/ | | | | | | | | | | Move rt scheduler definitions out of include/linux/sched.h into new file include/linux/sched/rt.h Signed-off-by: Clark Williams <williams@redhat.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Steven Rostedt <rostedt@goodmis.org> Link: http://lkml.kernel.org/r/20130207094707.7b9f825f@riff.lan Signed-off-by: Ingo Molnar <mingo@kernel.org>
* spi/sh-hspi: fix return value check in hspi_probe().Cyril Roelandt2012-12-19
| | | | | | | | | According to its documentation, clk_get() returns a "valid IS_ERR() condition containing errno", so we should call IS_ERR() rather than a NULL check. Signed-off-by: Cyril Roelandt <tipecaml@gmail.com> Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi/atmel: add DT supportJean-Christophe PLAGNIOL-VILLARD2012-12-17
| | | | | | | | | | Use the newly introduce cs-gpios dt support on atmel. We do not use the hardware cs as it's wired and has bugs and limitations. As the controller believes that only active-low devices/systems exists. Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@jcrosoft.com> Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* of/spi: Fix SPI module loading by using proper "spi:" modalias prefixes.David Daney2012-12-14
| | | | | | | | | To get modprobe to automatically load the proper modules, we need to prefix things with "spi:". Partially based on Grant Likely's suggestions. Signed-off-by: David Daney <david.daney@cavium.com> [grant.likely: reworked because drivers/of/of_spi.c has been removed] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi: Change FIFO flush operation and spi channel offKyoungil Kim2012-12-14
| | | | | | | | | Setting SW_RST does TX/RX FIFO flush. After FIFO flush, SW_RST should be cleared. The above setting and clearing SW_RST operation should be done after spi channel off. Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi: Keep chipselect assertion during one messageKyoungil Kim2012-12-14
| | | | | | | | During all transfers in one message, the device will not be chagned. So we don't need to deassert chipselect during one message. Signed-off-by: Kyoungil Kim <ki0351.kim@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* Merge tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2012-12-13
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Pull SPI updates from Grant Likely: "Primarily SPI device driver bug fixes, one removal of an old driver, and some new tegra support. There is some core code change too, but all in all pretty small stuff. The new features to note are: - Common code for describing GPIO CS lines in the device tree - Remove the SPI_BUFSIZ limitation on spi_write_the_read() - core spi ensures bits_per_word is set correctly - SPARC can now use SPI" * tag 'spi-for-linus' of git://git.secretlab.ca/git/linux-2.6: (36 commits) spi/sparc: Allow of_register_spi_devices for sparc spi: Remove HOTPLUG section attributes spi: Add support for specifying 3-wire mode via device tree spi: Fix comparison of different integer types spi/orion: Add SPI_CHPA and SPI_CPOL support to kirkwood driver. spi/sh: Add SH Mobile series as dependency to MSIOF controller spi/sh-msiof: Remove unneeded clock name spi: Remove SPI_BUFSIZ restriction on spi_write_then_read() spi/stmp: remove obsolete driver spi/clps711x: New SPI master driver spi: omap2-mcspi: remove duplicate inclusion of linux/err.h spi: omap2-mcspi: Fix the redifine warning spi/sh-hspi: add CS manual control support of_spi: add generic binding support to specify cs gpio spi: omap2-mcspi: remove duplicated include from spi-omap2-mcspi.c spi/bitbang: (cosmetic) simplify list manipulation spi/bitbang: avoid needless loop flow manipulations spi/omap: fix D0/D1 direction confusion spi: tegra: add spi driver for sflash controller spi: Dont call master->setup if not populated ...
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