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path: root/drivers/spi/spi-dw-mmio.c
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* spi: dw-mmio: remove message which is handled by coreAndy Shevchenko2016-02-051-5/+0
| | | | | | | | devm_ioremap_resource() validates its parameters and issues an error message if needed. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: dw-mmio: convert to unified device property APIAndy Shevchenko2015-10-191-4/+3
| | | | | | | Convert the driver to use unfied device property API instead of OF one. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: dw: Allow interface drivers to limit data I/O to word sizesMichael van der Westhuizen2015-08-211-0/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | The commit dd11444327ce ("spi: dw-spi: Convert 16bit accesses to 32bit accesses") changed all 16bit accesses in the DW_apb_ssi driver to 32bit. This, unfortunately, breaks data register access on picoXcell, where the DW IP needs data register accesses to be word accesses (all other accesses appear to be OK). This change introduces a new master variable to allow interface drivers to specify that 16bit data transfer I/O is required. This change also introduces the ability to set this variable via device tree bindings in the MMIO interface driver. Both the core and the MMIO interface driver default to the current 32bit behaviour. Before this change, on a picoXcell pc3x3: spi_master spi32766: interrupt_transfer: fifo overrun/underrun m25p80 spi32766.0: error -5 reading 9f m25p80: probe of spi32766.0 failed with error -5 After this change: m25p80 spi32766.0: m25p40 (512 Kbytes) Fixes: dd11444327ce ("spi: dw-spi: Convert 16bit accesses to 32bit accesses") Signed-off-by: Michael van der Westhuizen <michael@smart-africa.com> Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Mark Brown <broonie@kernel.org>
* spi: drop owner assignment from platform_driversWolfram Sang2014-10-201-1/+0
| | | | | | | A platform_driver does not need to set an owner, it will be populated by the driver core. Signed-off-by: Wolfram Sang <wsa@the-dreams.de>
* spi: dw-mmio: add devicetree supportSteffen Trumtrar2014-07-031-1/+18
| | | | | | | Allow probing the dw-mmio from devicetree. Signed-off-by: Steffen Trumtrar <s.trumtrar@pengutronix.de> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: dw: add support for gpio controlled chip selectBaruch Siach2014-04-241-0/+22
| | | | | | | | Also, use this opportunity to let spi_chip_sel() handle chip-select deactivation as well. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: dw-mmio: allow multiple instancesBaruch Siach2014-02-031-1/+1
| | | | | | | | Use the platform_device id to uniquely identify each SPI master instance. Cc: Jean-Hugues Deschenes <jean-hugues.deschenes@octasic.com> Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: dw-mmio: prepare the clock before enablingBaruch Siach2013-12-311-3/+3
| | | | | | | This is required for common clock support. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: dw: use managed resourcesBaruch Siach2013-12-311-50/+20
| | | | | | | | | Migrate mmio code and core driver to managed resources to reduce boilerplate error handling code. Also, handle clk_enable() failure while at it, and drop unused dw_spi iolen field. Signed-off-by: Baruch Siach <baruch@tkos.co.il> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: designware: delete premature free_irqJulia Lawall2013-09-171-4/+1
| | | | | | | | | | | | | | | | | | | | | | | Free_irq is not needed if there has been no request_irq. Free_irq is removed from both the probe and remove functions. The correct request_irq and free_irq appear to be in the add_host and remove_host functions in spi-dw.c. A simplified version of the semantic match that finds this problem is as follows: (http://coccinelle.lip6.fr/) // <smpl> @@ expression e; @@ *e = platform_get_irq(...); ... when != request_irq(e,...) *free_irq(e,...) // </smpl> Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Mark Brown <broonie@linaro.org>
* spi: remove unnecessary platform_set_drvdata()Jingoo Han2013-05-131-2/+0
| | | | | | | | | | | The driver core clears the driver data to NULL after device_release or on probe failure, since commit 0998d0631001288a5974afc0b2a5f568bcdecb4d (device-core: Ensure drvdata = NULL when no driver is bound). Thus, it is not needed to manually clear the device driver data to NULL. Signed-off-by: Jingoo Han <jg1.han@samsung.com> Acked-by: Grant Likely <grant.likely@linaro.org> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
* spi: Remove HOTPLUG section attributesGrant Likely2012-12-071-3/+3
| | | | | | | | | | | | | | CONFIG_HOTPLUG is going away as an option. As result the __dev* markings will be going away. Remove use of __devinit, __devexit_p, __devinitdata, __devinitconst, and __devexit. Bill Pemberton has done most of the legwork on this series. I've used his script to purge the attributes from the drivers/gpio tree. Reported-by: Bill Pemberton <wfp5p@virginia.edu> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* spi: Add module.h to implicit users in drivers/spiPaul Gortmaker2011-10-311-0/+1
| | | | | | | | We are clipping down the presence of module.h, since it was everywhere. If you really need it, you better call it out, as per this changeset. Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
* drivercore: Add helper macro for platform_driver boilerplateGrant Likely2011-10-251-12/+2
| | | | | | | | | | | | | | For simple modules that contain a single platform_driver without any additional setup code then ends up being a block of duplicated boilerplate. This patch adds a new macro, module_platform_driver(), which replaces the module_init()/module_exit() registrations with template functions. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Reviewed-by: Magnus Damm <magnus.damm@gmail.com> Reviewed-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
* spi: reorganize driversGrant Likely2011-06-061-0/+151
Sort the SPI makefile and enforce the naming convention spi_*.c for spi drivers. This change also rolls the contents of atmel_spi.h into the .c file since there is only one user of that particular include file. v2: - Use 'spi-' prefix instead of 'spi_' to match what seems to be be the predominant pattern for subsystem prefixes. - Clean up filenames in Kconfig and header comment blocks Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Wolfram Sang <w.sang@pengutronix.de> Acked-by: Linus Walleij <linus.walleij@linaro.org>
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