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2011-02-15spi/pxa2xx pci: fix the release - remove raceSebastian Andrzej Siewior
Right now the platform device and its platform data is included in one big struct which requires its custom ->release function. The problem with the release function within the driver is that it might be called after the driver was removed because someone was holding a reference to it and it was not called right after platform_device_unregister(). So we also free the platform device memory to which one might hold a reference. This patch uses the normal pdev functions so this kind of race does not occur. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-21spi/spi_sh_msiof: fix wrong address calculation, which leads to an OopsGuennadi Liakhovetski
NULL + <small offset> != NULL, but reading from that <small offset> address is usually not a very good idea and often leads to problems, like kernel Oopses in this case, easily reproducible by writing to an SD-card, used in SPI mode. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-18Merge branch 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linusLinus Torvalds
* 'upstream' of git://git.linux-mips.org/pub/scm/upstream-linus: (26 commits) MIPS: Malta: enable Cirrus FB console MIPS: add CONFIG_VIRTUALIZATION for virtio support MIPS: Implement __read_mostly MIPS: ath79: add common WMAC device for AR913X based boards MIPS: ath79: Add initial support for the Atheros AP81 reference board MIPS: ath79: add common SPI controller device SPI: Add SPI controller driver for the Atheros AR71XX/AR724X/AR913X SoCs MIPS: ath79: add common GPIO buttons device MIPS: ath79: add common watchdog device MIPS: ath79: add common GPIO LEDs device MIPS: ath79: add initial support for the Atheros PB44 reference board MIPS: ath79: utilize the MIPS multi-machine support MIPS: ath79: add GPIOLIB support MIPS: Add initial support for the Atheros AR71XX/AR724X/AR931X SoCs MIPS: jump label: Add MIPS support. MIPS: Use WARN() in uasm for better diagnostics. MIPS: Optimize TLB handlers for Octeon CPUs MIPS: Add LDX and LWX instructions to uasm. MIPS: Use BBIT instructions in TLB handlers MIPS: Declare uasm bbit0 and bbit1 functions. ...
2011-01-18SPI: Add SPI controller driver for the Atheros AR71XX/AR724X/AR913X SoCsGabor Juhos
The Atheros AR71XX/AR724X/AR913X SoCs have a built-in SPI controller. This patch implements a driver for that. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Cc: David Brownell <dbrownell@users.sourceforge.net> Cc: spi-devel-general@lists.sourceforge.net Acked-by: Grant Likely <grant.likely@secretlab.ca> Cc: linux-mips@linux-mips.org Cc: Imre Kaloz <kaloz@openwrt.org> Cc: Luis R. Rodriguez <lrodriguez@atheros.com> Cc: Cliff Holden <Cliff.Holden@Atheros.com> Cc: Kathy Giori <Kathy.Giori@Atheros.com> Patchwork: https://patchwork.linux-mips.org/patch/1960/ Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
2011-01-17spi/spi_sh_msiof: fix a wrong free_irq() parameterGuennadi Liakhovetski
Without this fix reloading of the driver is impossible. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-14spi/amba-pl022: fixing compilation warning.Viresh Kumar
clk_freq is used uninitialized in pl022_setup routine. This patch fix compilation warning for using uninitialized variable Signed-off-by: Viresh Kumar <viresh.kumar@st.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-14Merge branch 'devicetree/next' into spi/nextGrant Likely
2011-01-14spi: Enable SPI driver for S5P6440 and S5P6450Abhilash Kesavan
This patch enables the existing S3C64XX series SPI driver for S5P64X0 and removed dependency on EXPERIMENTAL because we don't need it now. v3: Changed dependency of S3C64XX_DMA v2: Removed dependency on EXPERIMENTAL Signed-off-by: Abhilash Kesavan <a.kesavan@samsung.com> Signed-off-by: Sangbeom Kim <sbkim73@samsung.com> Acked-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-13Merge branch 'for-next' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-next' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (43 commits) Documentation/trace/events.txt: Remove obsolete sched_signal_send. writeback: fix global_dirty_limits comment runtime -> real-time ppc: fix comment typo singal -> signal drivers: fix comment typo diable -> disable. m68k: fix comment typo diable -> disable. wireless: comment typo fix diable -> disable. media: comment typo fix diable -> disable. remove doc for obsolete dynamic-printk kernel-parameter remove extraneous 'is' from Documentation/iostats.txt Fix spelling milisec -> ms in snd_ps3 module parameter description Fix spelling mistakes in comments Revert conflicting V4L changes i7core_edac: fix typos in comments mm/rmap.c: fix comment sound, ca0106: Fix assignment to 'channel'. hrtimer: fix a typo in comment init/Kconfig: fix typo anon_inodes: fix wrong function name in comment fix comment typos concerning "consistent" poll: fix a typo in comment ... Fix up trivial conflicts in: - drivers/net/wireless/iwlwifi/iwl-core.c (moved to iwl-legacy.c) - fs/ext4/ext4.h Also fix missed 'diabled' typo in drivers/net/bnx2x/bnx2x.h while at it.
2011-01-12spi/imx: Add i.MX53 supportYong Shen
1. Change the Kconfig to include i.MX53 2. add devtype entry for i.MX53 Signed-off-by: Yong Shen <yong.shen@freescale.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-11spi/dw_spi: don't treat NULL clk as an errorJamie Iles
clk_get() returns a struct clk cookie to the driver and some platforms may return NULL if they only support a single clock. clk_get() has only failed if it returns a ERR_PTR() encoded pointer. Signed-off-by: Jamie Iles <jamie@jamieiles.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-10spi: tegra: don't treat NULL clk as an errorJamie Iles
Some platforms have been known to return NULL from clk_get() if they support only a single struct clk. Whilst tegra doesn't do this, make the drivers consistent with others. Signed-off-by: Jamie Iles <jamie@jamieiles.com> Acked-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-10Merge branch 'for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6 * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/suspend-2.6: spi / PM: Support dev_pm_ops PM: Prototype the pm_generic_ operations PM / Runtime: Generic resume shouldn't set RPM_ACTIVE unconditionally PM: Use dev_name() in core device suspend and resume routines PM: Permit registration of parentless devices during system suspend PM: Replace the device power.status field with a bit field PM: Remove redundant checks from core device resume routines PM: Use a different list of devices for each stage of device suspend PM: Avoid compiler warning in pm_noirq_op() PM: Use pm_wakeup_pending() in __device_suspend() PM / Wakeup: Replace pm_check_wakeup_events() with pm_wakeup_pending() PM: Prevent dpm_prepare() from returning errors unnecessarily PM: Fix references to basic-pm-debugging.txt in drivers-testing.txt PM / Runtime: Add synchronous runtime interface for interrupt handlers (v3) PM / Hibernate: When failed, in_suspend should be reset PM / Hibernate: hibernation_ops->leave should be checked too Freezer: Fix a race during freezing of TASK_STOPPED tasks PM: Use proper ccflag flag in kernel/power/Makefile PM / Runtime: Fix comments to match runtime callback code
2011-01-07Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: (77 commits) spi/omap: Fix DMA API usage in OMAP MCSPI driver spi/imx: correct the test on platform_get_irq() return value spi/topcliff: Typo fix threhold to threshold spi/dw_spi Typo change diable to disable. spi/fsl_espi: change the read behaviour of the SPIRF spi/mpc52xx-psc-spi: move probe/remove to proper sections spi/dw_spi: add DMA support spi/dw_spi: change to EXPORT_SYMBOL_GPL for exported APIs spi/dw_spi: Fix too short timeout in spi polling loop spi/pl022: convert running variable spi/pl022: convert busy flag to a bool spi/pl022: pass the returned sglen to the DMA engine spi/pl022: map the buffers on the DMA engine spi/topcliff_pch: Fix data transfer issue spi/imx: remove autodetection spi/pxa2xx: pass of_node to spi device and set a parent device spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes. spi/pxa2xx: Add chipselect support for Sodaville spi/pxa2xx: Consider CE4100's FIFO depth spi/pxa2xx: Add CE4100 support ...
2011-01-07spi/omap: Fix DMA API usage in OMAP MCSPI driverRussell King - ARM Linux
Running the latest kernel on the 4430SDP board with DMA API debugging enabled results in this: WARNING: at lib/dma-debug.c:803 check_unmap+0x19c/0x6f0() NULL NULL: DMA-API: device driver tries to free DMA memory it has not allocated [device address=0x000000008129901a] [size=260 bytes] Modules linked in: Backtrace: [<c003cbe0>] (dump_backtrace+0x0/0x10c) from [<c0278da8>] (dump_stack+0x18/0x1c) r7:c1839dc0 r6:c0198578 r5:c0304b17 r4:00000323 [<c0278d90>] (dump_stack+0x0/0x1c) from [<c005b158>] (warn_slowpath_common+0x58/0x70) [<c005b100>] (warn_slowpath_common+0x0/0x70) from [<c005b214>] (warn_slowpath_fmt+0x38/0x40) r8:c1839e40 r7:00000000 r6:00000104 r5:00000000 r4:8129901a [<c005b1dc>] (warn_slowpath_fmt+0x0/0x40) from [<c0198578>] (check_unmap+0x19c/0x6f0) r3:c03110de r2:c0304e6b [<c01983dc>] (check_unmap+0x0/0x6f0) from [<c0198cd8>] (debug_dma_unmap_page+0x74/0x80) [<c0198c64>] (debug_dma_unmap_page+0x0/0x80) from [<c01d5ad8>] (omap2_mcspi_work+0x514/0xbf0) [<c01d55c4>] (omap2_mcspi_work+0x0/0xbf0) from [<c006dfb0>] (process_one_work+0x294/0x400) [<c006dd1c>] (process_one_work+0x0/0x400) from [<c006e50c>] (worker_thread+0x220/0x3f8) [<c006e2ec>] (worker_thread+0x0/0x3f8) from [<c00738d0>] (kthread+0x88/0x90) [<c0073848>] (kthread+0x0/0x90) from [<c005e924>] (do_exit+0x0/0x5fc) r7:00000013 r6:c005e924 r5:c0073848 r4:c1829ee0 ---[ end trace 1b75b31a2719ed20 ]--- I've no idea why this driver uses NULL for dma_unmap_single instead of the &spi->dev that is laying around just waiting to be used in that function - but it's an easy fix. Also replace this comment with a FIXME comment: /* Do DMA mapping "early" for better error reporting and * dcache use. Note that if dma_unmap_single() ever starts * to do real work on ARM, we'd need to clean up mappings * for previous transfers on *ALL* exits of this loop... */ as the comment is not true - we do work in dma_unmap() functions, particularly on ARMv6 and above. I've corrected the existing unmap functions but if any others are required they must be added ASAP. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> Acked-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-07spi/imx: correct the test on platform_get_irq() return valueRichard Genoud
The test "if (spi_imx->irq <= 0)" is not testing the IRQ value, but the return value of platform_get_irq(). As platform_get_irq() can return an error (-ENXIO) or the IRQ value it found, the test should be "if (spi_imx->irq < 0)" [grant.likely: Note: In general, Linux irq number 0 should also mean no irq, but arm still allows devices to be assigned 0, and the imx platform uses 0 for one of the spi devices, so this patch is needed for the device to work] Signed-off-by: Richard Genoud <richard.genoud@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-31spi/topcliff: Typo fix threhold to thresholdJustin P. Mattock
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-30spi/dw_spi Typo change diable to disable.Justin P. Mattock
Signed-off-by: Justin P. Mattock <justinmattock@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29spi/m68knommu: Coldfire QSPI platform supportJate Sujjavanich
After grabbing a msg from the msgq, the mcfqspi_work function calls list_del_init on the mcfqspi->msgq which unintentionally deletes the rest of the list before it can be processed. If qspi call was made using spi_sync, this can result in a process hang. Signed-off-by: Jate Sujjavanich <jsujjavanich@syntech-fuelmaster.com> Acked-by: Steven King <sfking@fdwdc.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29spi/fsl_espi: change the read behaviour of the SPIRFMingkai Hu
The user must read N bytes of SPIRF (1 <= N <= 4) that do not exceed the amount of data in the receive FIFO, so read the SPIRF byte by byte when the data in receive FIFO is less than 4 bytes. On Simics, when read N bytes that exceed the amout of data in receive FIFO, we can't read the data out, that is we can't clear the rx FIFO, then the CPU will loop on the espi rx interrupt. Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29spi/omap2_mcspi.c: Force CS to be in inactive state after off-mode transitionGregory CLEMENT
When SPI wake up from OFF mode, CS is in the wrong state: force it to the inactive state. During the system life, I monitored the CS behavior using a oscilloscope. I also activated debug in omap2_mcspi, so I saw when driver disable the clocks and restore context when device is not used.Each time the CS was in the correct state. It was only when system was put suspend to ram with off-mode activated that on resume the CS was in wrong state( ie activated). Changelog: * Change from v1 to v2: - Rebase on linus/master (after 2.6.37-rc1) - Do some clean-up and fix indentation on both patches - Add more explanations for patch 2 * Change from v2 to v3: - Use directly resume function of spi_master instead of using function - from spi_device as Grant Likely pointed it out. - Force this transition explicitly for each CS used by a device. * Change from v3 to v4: - Patch clean-up according to Kevin Hilman and checkpatch. - Now force CS to be in inactive state only if it was inactive when it was suspended. * Change from v4 to v5: - Rebase on linus/master (after 2.6.37-rc3) - Collapse some lines as pointed by Grant Likely - Fix a spelling * Change from v5 to v6: - Rebase on linus/master (after 2.6.37-rc7) - Use CONFIG_SUSPEND instead of CONFIG_PM - Didn't use legacy PM methods anymore. Instead, add a struct dev_pm_ops and add the resume method there. - Fix multi-line comment style * Change from v6 to v7: - Rebase on linus/master (after 2.6.37-rc8) - Drop an extra line Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Reviewed-by: Kevin Hilman <khilman@deeprootsystems.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-29Merge branch 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/nextGrant Likely
* 'spi' of git://git.linutronix.de/users/bigeasy/soda into spi/next spi/pxa2xx: register driver properly spi/pxa2xx: add support for shared IRQ handler spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbers arm/pxa2xx: reorgazine SSP and SPI header files spi/pxa2xx: Add CE4100 support spi/pxa2xx: Consider CE4100's FIFO depth spi/pxa2xx: Add chipselect support for Sodaville spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes. spi/pxa2xx: pass of_node to spi device and set a parent device
2010-12-29Merge branch 'for-grant' of ↵Grant Likely
git://arago-project.org/git/projects/linux-davinci into spi/next * 'for-grant' of git://arago-project.org/git/projects/linux-davinci into spi/next spi: davinci: fix checkpatch errors spi: davinci: whitespace cleanup spi: davinci: remove unused variable 'pdata' spi: davinci: set chip-select mode in SPIDEF only once spi: davinci: enable both activation and deactivation of chip-selects spi: davinci: remove unnecessary data transmit on CS disable spi: davinci: enable GPIO lines to be used as chip selects spi: davinci: simplify prescalar calculation spi: davinci: remove 'wait_enable' platform data member spi: davinci: make chip-slect specific parameters really chip-select specific spi: davinci: consolidate setup of SPIFMTn in one function spi: davinci: setup chip-select timers values only if timer enabled spi: davinci: add support for wait enable timeouts spi: davinci: remove unused members of davinci_spi_slave spi: davinci: eliminate the single member structure davinci_spi_slave spi: davinci: eliminate unnecessary update of davinci_spi->count spi: davinci: simplify calculation of edma acount value spi: davinci: check for NULL buffer pointer before using it spi: davinci: remove unnecessary disable of SPI spi: davinci: remove unnecessary 'count' variable in driver private data spi: davinci: remove unnecessary completion variable initialization spi: davinci: remove non-useful interrupt mode support spi: davinci: simplify poll mode transfers spi: davinci: add support for interrupt mode spi: davinci: configure the invariable bits in spipc0 only once spi: davinci: remove unnecessary function davinci_spi_bufs_prep() spi: davinci: remove unnecessary call to davinci_spi_setup_transfer() spi: davinci: do not store DMA channel information per chip select spi: davinci: always start transmit DMA spi: davinci: do not use temporary buffer if no transmit data provided spi: davinci: always start receive DMA spi: davinci: use edma_write_slot() to setup EDMA PaRAM slot spi: davinci: fix DMA event generation stoppage spi: davinci: fix EDMA CC errors at end of transfers spi: davinci: handle DMA completion errors correctly spi: davinci: remove usage of additional completion variables for DMA spi: davinci: let DMA operation be specified on per-device basis spi: davinci: remove non-useful "clk_internal" platform data spi: davinci: enable and power-up SPI only when required spi: davinci: setup the driver owner spi: davinci: add additional comments spi: davinci: add EF Johnson Technologies copyright spi: davinci: removed unused #defines spi: davinci: remove unnecessary typecast spi: davinci: do not treat Tx interrupt being set as error spi: davinci: do not allocate DMA channels during SPI device setup spi: davinci: remove unnecessary private data member 'region_size' spi: davinci: shorten variable names spi: davinci: kconfig: add manufacturer name to prompt string
2010-12-25spi / PM: Support dev_pm_opsMark Brown
Allow SPI drivers to use runtime PM and other dev_pm_ops features by implementing dev_pm_ops for the bus. The existing bus specific suspend and resume functions will be called if a driver does not provide dev_pm_ops allowing for transition to the new model. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
2010-12-24Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'merge' of git://git.secretlab.ca/git/linux-2.6: spi/mpc52xx-spi: fix annotation for remove()-pointer spi/fsl_espi: fix wrong setting of the address in the command buffer spi/fsl_espi: change the read behaviour of the SPIRF of/i2c: Fix request module by alias powerpc/mpc5200: include fs.h in mpc52xx_gpt.c
2010-12-24spi/mpc52xx-psc-spi: move probe/remove to proper sectionsWolfram Sang
Probe/remove should be in __devinit/__devexit. Found by a section-mismatch warning. Also, copy do_remove() over to remove(). Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24spi/mpc52xx-spi: fix annotation for remove()-pointerWolfram Sang
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24spi/fsl_espi: fix wrong setting of the address in the command bufferMingkai Hu
Or else we can't operate on the right address when the trans length is greater than 65535. Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24spi/fsl_espi: change the read behaviour of the SPIRFMingkai Hu
The user must read N bytes of SPIRF (1 <= N <= 4) that do not exceed the amount of data in the receive FIFO, so read the SPIRF byte by byte when the data in receive FIFO is less than 4 bytes. On Simics, when read N bytes that exceed the amount of data in receive FIFO, we can't read the data out, that is we can't clear the rx FIFO, then the CPU will loop on the espi rx interrupt. Signed-off-by: Mingkai Hu <Mingkai.hu@freescale.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24spi/dw_spi: add DMA supportFeng Tang
dw_spi driver in upstream only supports PIO mode, and this patch will support it to cowork with the Designware dma controller used on Intel Moorestown platform, at the same time it provides a general framework to support dw_spi core to cowork with dma controllers on other platforms It has been tested with a Option GTM501L 3G modem and Infenion 60x60 modem. To use DMA mode, DMA controller 2 of Moorestown has to be enabled Also change the dma interface suggested by Linus Walleij. Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Feng Tang <feng.tang@intel.com> [Typo fix and renames to match intel_mid_dma renaming] Signed-off-by: Vinod Koul <vinod.koul@intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24spi/dw_spi: change to EXPORT_SYMBOL_GPL for exported APIsFeng Tang
Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-24spi/dw_spi: Fix too short timeout in spi polling loopFeng Tang
The SPI polling loop timeout only works with HZ=100 as the loop was actually too short. Also add appropriate cpu_relax() in the busy wait loops... Signed-off-by: Arjan van de Ven <arjan@linux.intel.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23spi/pl022: convert running variableLinus Walleij
This variable is a bool but defined an int and defined completely backwards. This makes the code more readable. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23spi/pl022: convert busy flag to a boolLinus Walleij
Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23spi/pl022: pass the returned sglen to the DMA engineLinus Walleij
The sglen return by the dma_map_sg() should be passed to the DMA engine, not the one passed in. If we one day have a DMA mapper that can coalesce entries, this will bug due to a too large number of entries being passed in. Reported-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23spi/pl022: map the buffers on the DMA engineLinus Walleij
The struct device for the DMA engine is the apropriate one to use when mapping/unmapping buffers. This is because the memory which is addressable by DMA is determined by the DMA engine rather than the device. Reported-by: Russell King <linux@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23spi/topcliff_pch: Fix data transfer issueTomoya MORINAGA
It seems spi_topcliff_pch of linux-2.6.37-rc6 degraded by previous patch. In fact, data transfer fails on evaluation board testing. I found like the following register miss-setting line. Using this patch, I have confirmed data transfer can work well. Signed-off-by: Tomoya MORINAGA <tomoya-linux@dsn.okisemi.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-23spi/imx: remove autodetectionUwe Kleine-König
There are no machines in-tree that still use the driver name as device name. So save a few bytes and remove it. Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Acked-by: Jason Wang <jason77.wang@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-12-22drivers/spi/spi.c: don't release the spi device twiceSebastian Andrzej Siewior
This was fixed by David Lamparter in v2.6.36-rc5 3486008 ("spi: free children in spi_unregister_master, not siblings") and broken again in v2.6.37-rc1~2^2~4 during the merge of 2b9603a0 ("spi: enable spi_board_info to be registered after spi_master"). Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: David Lamparter <equinox@diac24.net> Cc: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-22Merge branch 'master' into for-nextJiri Kosina
Conflicts: MAINTAINERS arch/arm/mach-omap2/pm24xx.c drivers/scsi/bfa/bfa_fcpim.c Needed to update to apply fixes for which the old branch was too outdated.
2010-12-22Merge commit 'v2.6.37-rc7' into spi/nextGrant Likely
2010-12-14dw_spi: Fix missing final read in some polling situationsMajor Lee
There is a possibility that the last word of a transaction will be lost if data is not ready. Re-read in poll_transfer() to solve this issue when poll_mode is enabled. Verified on SPI touch screen device. Signed-off-by: Major Lee <major_lee@wistron.com> Signed-off-by: Alan Cox <alan@linux.intel.com> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2010-12-02spi/pxa2xx: pass of_node to spi device and set a parent deviceSebastian Andrzej Siewior
the of_node will auto-publish devices which are added to the device tree. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
2010-12-02spi/pxa2xx: Modify RX-Tresh instead of busy-loop for the remaining RX bytes.Sebastian Andrzej Siewior
After all TX bytes are sent, the driver spins while the SPI core is busy and then it spins for a "short" period of time until RX bytes are available. On Sodavile the busy flag disappears pretty quick and after that it takes approx ~130ms (sometimes less but not much) until there are bytes available in the RX FIFO. This patch removes the busy loop and modifies the RX threshould so we get woken up once the remainings bytes arrived. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
2010-12-02spi/pxa2xx: Add chipselect support for SodavilleSebastian Andrzej Siewior
The SPI core on Sodaville supports chip selects. Its configuration moved into the SSSR register at bit 0 and 1. Thus Sodaville can be hooked up with up to 4 devices. This patch ensures that the bits which are otherwiese reserved are only touched on Sodaville and not on any other PXAs. Also it makes sure that the status register does not lose the CS information while clearing the ROR bit. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
2010-12-01spi/pxa2xx: Consider CE4100's FIFO depthSebastian Andrzej Siewior
For PXA the default threshold is FIFO_DEPTH / 2. Adjust this value for CE4100. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
2010-12-01spi/pxa2xx: Add CE4100 supportSebastian Andrzej Siewior
Sodaville's SPI controller is very much the same as in PXA25x. The difference: - The RX/TX FIFO is only 4 words deep instead of 16 - No DMA support - The SPI controller offers a CS functionality Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
2010-12-01arm/pxa2xx: reorgazine SSP and SPI header filesSebastian Andrzej Siewior
The PXA-SPI driver relies on some files / defines which are arm specific and are within the ARM tree. The CE4100 SoC which is x86 has also the SPI core. This patch moves the ssp and spi files from arm/mach-pxa and plat-pxa to include/linux where the CE4100 can access them. This move got verified by building the following defconfigs: cm_x2xx_defconfig corgi_defconfig em_x270_defconfig ezx_defconfig imote2_defconfig pxa3xx_defconfig spitz_defconfig zeus_defconfig raumfeld_defconfig magician_defconfig Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
2010-12-01spi/pxa2xx: Use define for SSSR_TFL_MASK instead of plain numbersSebastian Andrzej Siewior
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
2010-12-01spi/pxa2xx: add support for shared IRQ handlerSebastian Andrzej Siewior
This is required in case the interrupt line is shared with other devices. Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de> Signed-off-by: Dirk Brandewie <dirk.brandewie@gmail.com>
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