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2011-03-24Merge branch 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2-4/+22
* 'devicetree/merge' of git://git.secretlab.ca/git/linux-2.6: spi/pl022: Add loopback support for the SPI on 5500 spi/omap_mcspi: Fix broken last word xfer of/flattree: minor cleanups dt: eliminate OF_NO_DEEP_PROBE and test for NULL match table dt: protect against NULL matches passed to of_match_node() dt: Refactor of_platform_bus_probe()
2011-03-23spi/pl022: Add loopback support for the SPI on 5500Philippe Langlais1-1/+19
Extend the vendor data with a loopback field, and add new amba-pl022 vendor data for the DB5500 pl023, as the pl023 on db8500 and db5500 vary. Signed-off-by: Prajadevi H <prajadevi.h@stericsson.com> Signed-off-by: Philippe Langlais <philippe.langlais@linaro.org> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-23spi/omap_mcspi: Fix broken last word xferJarkko Nikula1-3/+3
Commit adef658 "spi/omap_mcspi: catch xfers of non-multiple SPI word size" broke the transmission of last word in cases where access is multiple of word size and word size is 16 or 32 bits. Fix this by replacing the test "c > (word_len>>3)" in do-while loops with "c >= 'pointer increment size'". This ensures that the last word is transmitted in above case and still allow to break the loop and prevent variable c underflow in cases where word size != 'pointer increment size'. Signed-off-by: Jarkko Nikula <jhnikula@gmail.com> Tested-by: Sourav Poddar<sourav.poddar@ti.com> Acked-by: Michael Jones <michael.jones@matrix-vision.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-23mfd: mfd_cell is now implicitly available to timberdale driversAndres Salomon1-1/+2
The cell's platform_data is now accessed with a helper function; change clients to use that, and remove the now-unused data_size. Note that the mfd's platform_data is marked __devinitdata. This is still correct in all cases except for the timbgpio driver, whose remove hook has been changed to no longer reference the pdata. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2011-03-18Merge branch 'spi/next' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds18-144/+1855
* 'spi/next' of git://git.secretlab.ca/git/linux-2.6: (34 commits) spi/dw_spi: move dw_spi.h into drivers/spi spi/dw_spi: Fix missing header gpio/langwell: Clear edge bit before handling gpio/langwell: Simplify demux loop gpio/langwell: Convert irq name space gpio/langwell: Fix broken irq_eoi change. gpio; Make Intel chipset gpio drivers depend on x86 gpio/cs5535-gpio: Fix section mismatch spi/rtc-{ds1390,ds3234,m41t94}: Use spi_get_drvdata() for SPI devices spi/davinci: Support DMA transfers larger than 65535 words spi/davinci: Use correct length parameter to dma_map_single calls gpio: Use __devexit at necessary places gpio: add MODULE_DEVICE_TABLE to pch_gpio and ml_ioh_gpio gpio/mcp23s08: support mcp23s17 variant of_mmc_spi: add card detect irq support spi/omap_mcspi: catch xfers of non-multiple SPI word size spi/omap_mcspi: Off-by-one error in finding the right divisor gpio/pca953x: Fix wrong pointer type spi/pl022: rid dangling labels spi: add support for SuperH SPI ...
2011-03-18spi/dw_spi: move dw_spi.h into drivers/spiGrant Likely5-5/+243
include/linux/dw_spi.h only includes driver internal data. It doesn't expose a platform_data configuration structure or similar (at least nothing in-tree). This patch moves the header into drivers/spi so that the scope is limited to only the dw_spi_*.c driver files Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Cc: Feng Tang <feng.tang@intel.com> Cc: spi-devel-general@lists.sourceforge.net
2011-03-17Merge branch 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6Linus Torvalds1-154/+68
* 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (258 commits) omap: zoom: host should not pull up wl1271's irq line arm: plat-omap: iommu: fix request_mem_region() error path OMAP2+: Common CPU DIE ID reading code reads wrong registers for OMAP4430 omap4: mux: Remove duplicate mux modes omap: iovmm: don't check 'da' to set IOVMF_DA_FIXED flag omap: iovmm: disallow mapping NULL address when IOVMF_DA_ANON is set omap2+: mux: Fix compile when CONFIG_OMAP_MUX is not selected omap4: board-omap4panda: Initialise the serial pads omap3: board-3430sdp: Initialise the serial pads omap4: board-4430sdp: Initialise the serial pads omap2+: mux: Add macro for configuring static with omap_hwmod_mux_init omap2+: mux: Remove the use of IDLE flag omap2+: Add separate list for dynamic pads to mux perf: add OMAP support for the new power events OMAP4: Add IVA OPP enteries. OMAP4: Update Voltage Rail Values for MPU, IVA and CORE OMAP4: Enable 800 MHz and 1 GHz MPU-OPP OMAP3+: OPP: Replace voltage values with Macros OMAP3: wdtimer: Fix CORE idle transition Watchdog: omap_wdt: add fine grain runtime-pm ... Fix up various conflicts in - arch/arm/mach-omap2/board-omap3evm.c - arch/arm/mach-omap2/clock3xxx_data.c - arch/arm/mach-omap2/usb-musb.c - arch/arm/plat-omap/include/plat/usb.h - drivers/usb/musb/musb_core.h
2011-03-17Merge branch 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds4-11/+419
* 'devel-stable' of master.kernel.org:/home/rmk/linux-2.6-arm: (289 commits) davinci: DM644x EVM: register MUSB device earlier davinci: add spi devices on tnetv107x evm davinci: add ssp config for tnetv107x evm board davinci: add tnetv107x ssp platform device spi: add ti-ssp spi master driver mfd: add driver for sequencer serial port ARM: EXYNOS4: Implement Clock gating for System MMU ARM: EXYNOS4: Enhancement of System MMU driver ARM: EXYNOS4: Add support for gpio interrupts ARM: S5P: Add function to register gpio interrupt bank data ARM: S5P: Cleanup S5P gpio interrupt code ARM: EXYNOS4: Add missing GPYx banks ARM: S3C64XX: Fix section mismatch from cpufreq init ARM: EXYNOS4: Add keypad device to the SMDKV310 ARM: EXYNOS4: Update clocks for keypad ARM: EXYNOS4: Update keypad base address ARM: EXYNOS4: Add keypad device helpers ARM: EXYNOS4: Add support for SATA on ARMLEX4210 plat-nomadik: make GPIO interrupts work with cpuidle ApSleep mach-u300: define a dummy filter function for coh901318 ... Fix up various conflicts in - arch/arm/mach-exynos4/cpufreq.c - arch/arm/mach-mxs/gpio.c - drivers/net/Kconfig - drivers/tty/serial/Kconfig - drivers/tty/serial/Makefile - drivers/usb/gadget/fsl_mxc_udc.c - drivers/video/Kconfig
2011-03-17Merge branches 'defcfg', 'drivers' and 'cyberpro-next' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds1-1/+1
* 'defcfg' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 6647/1: add Versatile Express defconfig ARM: 6644/1: mach-ux500: update the U8500 defconfig * 'drivers' of master.kernel.org:/home/rmk/linux-2.6-arm: ARM: 6764/1: pl011: factor out FIFO to TTY code ARM: 6763/1: pl011: add optional RX DMA to PL011 v2 ARM: 6758/1: amba: support pm ops ARM: amba: make amba_driver id_table const ARM: amba: make internal ID table handling const ARM: amba: make probe() functions take const id tables ARM: 6662/1: amba: make amba_bustype non-static ARM: mmci: add dmaengine-based DMA support ARM: mmci: no need for separate host->data_xfered ARM: mmci: avoid unnecessary switch to data available PIO interrupts ARM: mmci: no need to call flush_dcache_page() with sg_miter API ARM: mmci: avoid reporting too many completed bytes on fifo overrun ALSA: AACI: make fifo variables more explanitory ALSA: AACI: no need to call snd_pcm_period_elapsed() for each period ALSA: AACI: use snd_pcm_lib_period_bytes() ALSA: AACI: clean up AACI announcement printk ALSA: AACI: fix channel mask selection ALSA: AACI: fix number of channels for record ALSA: AACI: fix multiple IRQ claiming * 'cyberpro-next' of master.kernel.org:/home/rmk/linux-2.6-arm: VIDEO: cyberpro: remove unused cyber2000fb_get_fb_var() VIDEO: cyberpro: remove useless function extreg pointers VIDEO: cyberpro: update handling of device structures VIDEO: cyberpro: add support for video capture I2C VIDEO: cyberpro: make 'reg_b0_lock' always present VIDEO: cyberpro: add I2C support VIDEO: cyberpro: select lowest multipler/divisor for PLL
2011-03-17Merge remote-tracking branch 'origin' into spi/nextGrant Likely8-36/+28
Pull in Linus' tree to pick up changes required for the langwell gpio fixes
2011-03-17Merge branches 'aaci', 'mmci-dma', 'pl' and 'pl011' into driversRussell King3-43/+26
2011-03-15Merge branch 'davinci-next-2' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci into devel-stableRussell King3-0/+413
2011-03-15spi: add ti-ssp spi master driverCyril Chemparathy3-0/+413
This patch adds an SPI master implementation that operates on top of an underlying TI-SSP port. Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Cyril Chemparathy <cyril@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com> Signed-off-by: Kevin Hilman <khilman@ti.com>
2011-03-14Merge branch 'davinci-next' of git://git.kernel.org/pub/scm/linux/kernel/git/khilman/linux-davinci into devel-stableRussell King1-8/+3
2011-03-14spi/davinci: Support DMA transfers larger than 65535 wordsMichael Williamson1-8/+25
The current davinci SPI driver, in DMA mode, is limited to 65535 words for a single transfer. Modify the driver by configuring a 3 dimensional EDMA transfer to support up to 65535x65535 words. Signed-off-by: Michael Williamson <michael.williamson@criticallink.com> Tested-by: Stefano Babic <sbabic@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-14spi/davinci: Use correct length parameter to dma_map_single callsMichael Williamson1-5/+5
The davinci spi driver provides an option to use DMA transfers for data. In the dma_map_single() call, the driver is passing the number of words to be transfered for the mapping size. It should be the number of bytes. Signed-off-by: Michael Williamson <michael.williamson@criticallink.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-12Merge commit 'v2.6.38-rc8' into spi/nextGrant Likely2-42/+25
Conflicts: drivers/spi/pxa2xx_spi_pci.c
2011-03-10Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into devel-stableRussell King1-3/+3
2011-03-08spi_imx: Fix misspelled configuration variable SOC_IMX31Alberto Panizzo1-1/+1
This fix a kernel NULL pointer error while initialising SPI introduced by: 4d2f13be1e370a670c1cae20c194d5ce961e0fa5 Signed-off-by: Alberto Panizzo <alberto@amarulasolutions.com> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-03-07ARM: imx3x: clean up ARCH_MX3XRichard Zhao1-2/+2
Move to SOC_SOC_IMX3X. Leave ARCH_MX31/35 definitions there, in case some place prevent multi-soc single image. Signed-off-by: Richard Zhao <richard.zhao@freescale.com> Acked-by: Marc Kleine-Budde <mkl@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-03-07ARM: imx5x: clean up ARCH_MX5XRichard Zhao1-2/+2
Move to SOC_SOC_IMX5X. Leave only places which prevent multi-soc using ARCH_MX5X. Signed-off-by: Richard Zhao <richard.zhao@freescale.com> Acked-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
2011-03-04spi/omap_mcspi: catch xfers of non-multiple SPI word sizeMichael Jones1-3/+6
If an SPI access was not a multiple of the SPI word size, the while() loop would spin and the rx/tx ptrs would be incremented indefinitely. Signed-off-by: Michael Jones <michael.jones@matrix-vision.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-03-02Merge branch 'devel-cleanup' into omap-for-linusTony Lindgren1-40/+21
Conflicts: arch/arm/mach-omap2/timer-gp.c
2011-02-28davinci: spi: move event queue parameter to platform dataMichael Williamson1-8/+3
For DMA operation, the davinci spi driver needs an event queue number. Currently, this number is passed as a IORESOURCE_DMA. This is not correct, as the event queue is not a DMA channel. Pass the event queue via the platform data structure instead. On dm355 and dm365, move the eventq assignment for spi0 out of resources array and into platform data. Signed-off-by: Michael Williamson <michael.williamson@criticallink.com> Acked-by: Sekhar Nori <nsekhar@ti.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: Kevin Hilman <khilman@ti.com>
2011-02-28dt/spi: Eliminate users of of_platform_{,un}register_driverGrant Likely8-36/+28
Get rid of users of of_platform_driver in drivers/spi. The of_platform_{,un}register_driver functions are going away, so the users need to be converted to using the platform_bus_type directly. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-28Merge commit 'v2.6.38-rc6' into devicetree/nextGrant Likely2-42/+25
Conflicts: drivers/spi/pxa2xx_spi_pci.c
2011-02-24spi/omap_mcspi: Off-by-one error in finding the right divisorHannu Heikkinen1-11/+18
Off-by-one error, gave erroneous divisor value 16 if speed_hz is over zero but less than OMAP2_MCSPI_MAX_FREQ / (1 << 15), that is, [1..1463]. Also few overly complex bit shifts in divisor fixed. Also one dev_dgb line fixed, which indicated max speed exceeding transfer speed. Introducing a new function omap2_mcspi_calc_divisor() for getting the right divisor in omap2_mcspi_setup_transfer(). Signed-off-by: Phil Carmody <ext-phil.2.carmody@nokia.com> Signed-off-by: Hannu Heikkinen <ext-hannu.m.heikkinen@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-23ARM: amba: make probe() functions take const id tablesRussell King1-1/+1
Make Primecell driver probe functions take a const pointer to their ID tables. Drivers should never modify their ID tables in their probe handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
2011-02-22spi/pl022: rid dangling labelsLinus Walleij1-2/+0
Remove a compilation error regarding unused labels that came about when simplifying the DMA code. Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-22spi: add support for SuperH SPIYoshihiro Shimoda3-0/+550
The SH7757 has SPI0 module. This patch supports it. Signed-off-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> [grant.likely@secretlab.ca: fixed Makefile ordering, added __dev{init,exit} annotations, removed DRIVER_VERSION (this is mainline, the version == the kernel version) and tidied some indentation & style stuff] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-22spi: New driver for Altera SPIThomas Chou3-0/+346
This patch adds a new SPI driver to support the Altera SOPC Builder SPI component. It uses the bitbanging library. Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-22spi: add OpenCores tiny SPI driverThomas Chou3-0/+433
This patch adds support of OpenCores tiny SPI driver. http://opencores.org/project,tiny_spi Signed-off-by: Thomas Chou <thomas@wytron.com.tw> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-22Merge branch 'devicetree/next' into spi/nextGrant Likely3-10/+0
To pick up removal of #ifdef around .of_match_table
2011-02-17OMAP: runtime: McSPI driver runtime conversionGovindraj.R1-74/+42
McSPI runtime conversion. Changes involves: 1) remove clock framework apis to use runtime framework apis. 2) context restore from runtime resume which is a callback for get_sync. 3) Remove SYSCONFIG(sysc) register handling (a) Remove context save and restore of sysc reg and remove soft reset done from sysc reg as this will be done with hwmod framework. (b) Also cleanup sysc reg bit macros. 4) Rename the omap2_mcspi_reset function to omap2_mcspi_master_setup function as with hwmod changes soft reset will be done in hwmod framework itself and use the return value from clock enable function to return for failure scenarios. Signed-off-by: Charulatha V <charu@ti.com> Signed-off-by: Govindraj.R <govindraj.raja@ti.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Partha Basak <p-basak2@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-02-17OMAP: devices: Modify McSPI device to adapt to hwmod frameworkCharulatha V1-83/+29
Cleans up all base address definitions for omap_mcspi and adapts the device registration and driver to hwmod framework. Changes involves: 1) Removing all base address macro defines. 2) Using omap-device layer to register device and utilizing data from hwmod data file for base address, dma channel number, Irq_number, device attribute(number of chipselect). 3) Appending base address with pdata reg_offset for omap4 boards. For omap4 all regs used in driver deviate with reg_offset_macros defined with an value of 0x100. So pass this offset through pdata and append the same to base address retrieved from hwmod data file and we are not mapping *_HL_* regs which are not used in driver. Signed-off-by: Charulatha V <charu@ti.com> Signed-off-by: Govindraj.R <govindraj.raja@ti.com> Acked-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: Partha Basak <p-basak2@ti.com> Reviewed-by: Kevin Hilman <khilman@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
2011-02-16Merge branches 'devel-cleanup', 'devel-board', 'devel-early-init' and 'devel-ti816x' into omap-for-linusTony Lindgren1-2/+2
2011-02-15spi/imx: select master mode for all channelsSascha Hauer1-3/+9
The hardware seems to have a race condition when the inactive channels are in slave mode. We support master mode only, so we can just switch all channels to master mode. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> [ukleinek: add more verbose comment about the race] Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/pl022: minor kerneldoc updatesLinus Walleij1-9/+16
Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/pl022: remove dangling status checkVirupax Sadashivpetimath1-2/+0
Signed-off-by: Virupax Sadashivpetimath <virupax.sadashivpetimath@stericsson.com> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/pl022: disable core voltage when idleLinus Walleij1-4/+13
This utilizes the new core voltage switch to power off the PL022 core voltage when it's not in use transmitting packets, if and only if a core voltage switch is available. Cc: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/pl022: use dmaengine helper macrosLinus Walleij1-17/+10
This simplifies the DMA code a bit by using the dmaengine helpers. The cookie from descriptor submission can be ignored in this case as has been established in review of the MMCI/PL180 driver. Cc: Dan Williams <dan.j.williams@intel.com> Cc: Russell King <rmk+kernel@arm.linux.org.uk> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/bitbang: check for setup_transfer during initializationSascha Hauer1-9/+4
setup_transfer is mandatory if spi_bitbang_transfer is used, so check for it during initialization and not each time during runtime. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/bfin_spi: return immediately after skipping to next transferSonic Zhang1-0/+1
If there is an error with setting up a transfer, we need to return immediately rather than trying to continue to process things. We already set up the error states for the caller at this point. Signed-off-by: Sonic Zhang <sonic.zhang@analog.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/bfin_spi: support for multiples of 8bits with hardware CSBob Liu1-32/+71
We can do multiples of 8bit transfers when using the hardware CS and a little bit of magic, so make it work. Signed-off-by: Bob Liu <lliubbo@gmail.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-02-15spi/pxa2xx pci: fix the release - remove raceSebastian Andrzej Siewior1-40/+21
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>
2011-02-03spi/spidev: Add 32 bit compat ioctl()Bernhard Walle1-0/+12
Add the compat_ioctl for operations on /dev/spi* so that 32 bit userspace applications can access SPI. As far as I can see all data structure are already prepared for that, so no additional conversion has to be done. My use case is MIPS with N32 userspace ABI and toolchain, and that was also the platform where I tested it successfully (Cavium Octeon). Signed-off-by: Bernhard Walle <walle@corscience.de> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-27omap: Start using CONFIG_SOC_OMAPTony Lindgren1-2/+2
We want to have just CONFIG_ARCH_OMAP2, 3 and 4. The rest are nowadays just subcategories of these. Search and replace the following: ARCH_OMAP2420 SOC_OMAP2420 ARCH_OMAP2430 SOC_OMAP2430 ARCH_OMAP3430 SOC_OMAP3430 No functional changes. Signed-off-by: Tony Lindgren <tony@atomide.com> Signed-off-by: Thomas Weber <weber@corscience.de> Acked-by: Sourav Poddar <sourav.poddar@ti.com>
2011-01-21spi/spi_sh_msiof: consolidate data in 8-bit mode into 32-bit wordsGuennadi Liakhovetski1-0/+59
Instead of sending data 8 bits at a time in 8-bit SPI mode, swap bytes and send and receive them 32 bits at a time. Tested with an SD-card, with which this patch reduced the number of interrupts by 50%, when reading 5MiB of data (there are also small service packets, the number of interrupts, produced by 512-byte sectors should, of course, drop by 75%), and improved throughput by more than 40%. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-21spi/spi_sh_msiof: cosmetic clean-upGuennadi Liakhovetski1-34/+34
1. sort headers alphabetically 2. use fixed-size types u8, u16, u32 for register values and transferred data 3. simplify some arithmetic operations Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de> [grant.likely@secretlab.ca: removed label indentation change] Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2011-01-21spi/spi_sh_msiof: fix wrong address calculation, which leads to an OopsGuennadi Liakhovetski1-2/+4
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>
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