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path: root/drivers/spi
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2011-03-08spi: tegra: Fixing misc issues.Laxman Dewangan
Following are the fixes; - Supportng half duplex. - Only using SW based CS. - Write to readback with command register does not work. Fixing issue. - Using cpu based transfer for smaller size and dma based for larger size. - reading proper transfer status after every transaction. bug 791149 bug 791780 Change-Id: I293b3f1b571276f5d8fe4ad4da67f827926e4b73 Reviewed-on: http://git-master/r/20581 Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com> Tested-by: Laxman Dewangan <ldewangan@nvidia.com> Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Reviewed-by: Amit Kamath <akamath@nvidia.com>
2011-01-25spi: tegra: disabling packed modeAmit Kamath
disable unstable packed spi mode Change-Id: I81a11a0f5dd9515ff1430ccfcc7d2ed7371e79b3 Reviewed-on: http://git-master/r/16105 Reviewed-by: Varun Colbert <vcolbert@nvidia.com> Tested-by: Varun Colbert <vcolbert@nvidia.com>
2011-01-18[ARM] tegra: spi: Fixed setup bugsAmit Kamath
Enabled clocks at spi_setup Fixed problem with endianness for 16 bit word size Fixed issue with small packet size less than fifo depth Fixed typo that enabled RX and TX by default Integration from http://git-master/r/#change,14536 Change-Id: I2cea3bdcb6a19780087671131a848095354105a3 Reviewed-on: http://git-master/r/15949 Reviewed-on: http://git-master/r/16048 Reviewed-by: Amit Kamath <akamath@nvidia.com> Tested-by: Amit Kamath <akamath@nvidia.com> Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
2010-12-21[misc] remove executable permission on spi_tegra.cminwuklee
remove executable permission on the target file. Change-Id: I85c88e111cfe54d068d0dd47354f08b2e78537ef Reviewed-on: http://git-master/r/14040 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
2010-12-21[tegra:spi] master tegra spi driver updateminwuklee
- DMA burst size can be set to 1, 4, or 8 depending on requested size - PACKED MODE support - When bits per word is 32, no endian conversion is needed; so use memcpy to copy from client buf to dma buf or vice versa - Do spi_complete operation in the last dma complete callback - Reducing the loop-count from 500 to 50, thus making sure suspend is not stuck. bug 747979 bug 765062 Change-Id: I67fe1405e1cda886e9229b26dff5ebd80fd67247 Reviewed-on: http://git-master/r/12799 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
2010-12-14[misc] cancel executable permission on source filesChao Jiang
Source files should not be with executable permission. Change-Id: I70b6be4cf88fea4be9b092ca2f5dd08e40ee7cbd Reviewed-on: http://git-master/r/12081 Reviewed-by: Chao Jiang <chaoj@nvidia.com> Tested-by: Chao Jiang <chaoj@nvidia.com> Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com>
2010-12-07[tegra:dma] set dma burst size for spi/slinkminwuklee
for spi/slink, depending on transfer size, burst size can be set to 1, 4, or 8. bug 747979 Change-Id: Ieae0285d374e7d0eb6c2c2e633f8cafbb2b51b3a Reviewed-on: http://git-master/r/12076 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
2010-12-01[tegra:dma] set dma burst size for spi/slinkminwuklee
for spi/slink, set dma burst size based on transfer size. bug 747979 Change-Id: I8c3c0a0410648a25190847590b9ac0304fb1105f Reviewed-on: http://git-master/r/11752 Reviewed-by: Bharat Nihalani <bnihalani@nvidia.com> Tested-by: Bharat Nihalani <bnihalani@nvidia.com>
2010-10-18spi: tegra: Use shared DMA channelColin Cross
To avoid running out of DMA channels, use the shared DMA channel for all four Tegra spi controllers. Change-Id: Iff644253cf7fae36aa2e42321a1ded35a728da4f Signed-off-by: Colin Cross <ccross@android.com>
2010-10-15Merge commit 'v2.6.36-rc8' into linux-tegra-2.6.36Colin Cross
2010-10-14spi: tegra: cleanups from upstream reviewErik Gilling
Change-Id: Icecf7e64efcb39de072a15234ba1faa4bad40d25 Signed-off-by: Erik Gilling <konkers@android.com>
2010-10-08spi: tegra: Increase delay between CS and clock startGreg Meiste
Some SPI devices require a delay between the CS and when the clock starts. Increase SS_SETUP to accommodate these devices. Change-Id: I301e3583e70c722cadde5a9f91119881805dd3a5 Signed-off-by: Greg Meiste <w30289@motorola.com>
2010-10-06[ARM] Tegra: SPI: Suspend/resume.Todd Poynor
Save/restore SLINK_COMMAND_0 register. Wait for in-progress transactions to complete before suspend. Reject and WARN_ON transactions when suspended. Change-Id: I0527781f0bf95781afa3a35a68282cde2f0189ae Signed-off-by: Todd Poynor <toddpoynor@google.com>
2010-10-06spi: tegra: fix error setting on timeoutErik Gilling
avoids derefencing an uninitialized pointer Change-Id: Icf528441ae481e9f6f5ddc0be32c7c217fa49701 Signed-off-by: Erik Gilling <konkers@android.com>
2010-10-02of/spi: Fix OF-style driver binding of spi devicesSinan Akman
This patch adds the OF hook to the spi core so that devices can automatically be registered based on device tree data. This fixes a problem with spi devices not binding to drivers after the cleanup of the spi & i2c binding code. Signed-off-by: Sinan Akman <sinan@writeme.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-10-02spi: spi-gpio.c tests SPI_MASTER_NO_RX bit twice, but not SPI_MASTER_NO_TXRoel Kluin
The SPI_MASTER_NO_TX bit (can't do buffer write) wasn't tested. This code was introduced in commit 3c8e1a84 (spi/spi-gpio: add support for controllers without MISO or MOSI pin). This patch fixes a bug in choosing which transfer ops to use. Signed-off-by: Roel Kluin <roel.kluin@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-29spi: add spi_tegra driverErik Gilling
v2 changes: from Thierry Reding: * add "select TEGRA_SYSTEM_DMA" to Kconfig from Grant Likely: * add oneline description to header * inline references to DRIVER_NAME * inline references to BUSY_TIMEOUT * open coded bytes_per_word() * spi_readl/writel -> spi_tegra_readl/writel * move transfer validation to spi_tegra_transfer * don't request_mem_region iomem as platform bus does that for us * __exit -> __devexit v3 changes: from Russell King: * put request_mem_region back int from Grant Likely: * remove #undef DEBUG * add SLINK_ to register bit defines * remove unused bytes_per_word * make spi_tegra_readl/writel static linine * various refactoring for clarity * mark err if BSY bit is not cleared after 1000 retries * move spinlock to protect setting of RDY bit * subsys_initcall -> module_init v3 changes: from Grant Likely: * update spi_tegra to use PTR_ERRless dma API Signed-off-by: Erik Gilling <konkers@android.com> Cc: Thierry Reding <thierry.reding@avionic-design.de> Cc: Grant Likely <grant.likely@secretlab.ca> Cc: Russell King <linux@arm.linux.org.uk>
2010-09-16spi/mpc8xxx: fix buffer overrun on large transferschristophe leroy
It fixes an issue when sending-only or receiving-only more than PAGE_SIZE bytes. Signed-off-by: christophe leroy <christophe.leroy@c-s.fr> Acked-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/pl022: move probe call to subsys_initcall()Linus Walleij
The PL022 SPI bus is sometimes used for early stuff like regulators that need to be present at module_init() time, so we move this to a subsys_initcall(). Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/pl022: fix APB pclk power regression on U300Linus Walleij
With the introduction of an AMBA PrimeCell per-cell block clock, the pclk was left on after probe() unless explicitly disabled. This clock is wired to the same clock on PL022 causing it to stay always on since. Fix this up properly by clocking the pclk whenever we want to write into any PL022 registers and clocking the external clock whenever we want to transmit messages on the bus. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Tested-by : Kevin Wells <wellsk40@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/spi_s3c64xx: Warn if PIO transfers time outMark Brown
When using PIO we have a timeout for the TX and RX FIFOs to ensure that the data actually gets transferred. Warn if we hit that timeout - it should never happen, but this makes sure we'll find out if it does. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/s3c64xx: Fix incorrect reuse of 'val' local variable.Jassi Brar
Instead of, wrongly, reusing the 'val' variable, use a dedicated one for reading the status register. Signed-off-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/s3c64xx: Fix compilation warningJassi Brar
Fix compilation warning by typecasting the tx_buf pointer. [I'm not thrilled with resorting to a cast; but I cannot see a better way to go about this. I don't want to drop the const from struct spi_transfer ~~glikely] Signed-off-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/dw_spi: clean the cs_control codeFeng Tang
commit 052dc7c45i "spi/dw_spi: conditional transfer mode change" introduced cs_control code, which has a bug by using bit offset for spi mode to set transfer mode in control register. Also it forces devices who don't need cs_control to re-configure the control registers for each spi transfer. This patch will fix them Signed-off-by: Feng Tang <feng.tang@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/dw_spi: Allow interrupt sharingYong Wang
Allow interrupt sharing since exclusive interrupt line for DW SPI controller is not provided on every platform. Signed-off-by: Yong Wang <yong.y.wang@intel.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/spi_s3c64xx: Increase dead reckoning time in wait_for_xfer()Mark Brown
For small transfers at high speeds the expected transfer time can easily be well under 1ms, causing the delay in wait_for_xfer() to be only the dead reckoning fudge factor of 5ms currently included. Experiments on some of my systems shows that this is marginal for some transfers so double it to 10ms. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-08spi/spi_s3c64xx: Move to subsys_initcall()Mark Brown
Allow the use of the S3C64xx SPI controller with things like PMICs by moving the init up to subsys_initcall(). Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jassi Brar <jassi.brar@samsung.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-01spi: free children in spi_unregister_master, not siblingsDavid Lamparter
introduced by 49dce689 ("spi doesn't need class_device") and bad-fixed by 350d0076 ("spi: fix double-free on spi_unregister_master"), spi_unregister_master would previously device_unregister all of the spi master's siblings (instead of its children). hilarity ensues. fix it to unregister children. Signed-off-by: David Lamparter <equinox@diac24.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-01spi/spi_s3c64xx: Staticise non-exported functionsMark Brown
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-09-01spi/spi_s3c64xx: Make probe more robust against missing board configMark Brown
The S3C64xx SPI driver requires the machine to call s3c64xx_spi_set_info() to select a few options, including the clock to use for the SPI controller. If this is not done then a NULL will be passed as the clock name for clk_get(), causing an obscure crash. Guard against this and other missing configuration by validating that the clock name has been filled in in the platform data that ets passed in. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-08-18m68knommu: include sched.h in ColdFire/SPI driverGreg Ungerer
Using the coldfire qspi driver, I get the following error: drivers/spi/coldfire_qspi.c: In function 'mcfqspi_irq_handler': drivers/spi/coldfire_qspi.c:166: error: 'TASK_NORMAL' undeclared (first use in this function) drivers/spi/coldfire_qspi.c:166: error: (Each undeclared identifier is reported only once It is solved by adding the following include to coldfire_sqpi.c: #include <linux/sched.h> Fix suggested by Jate Sujjavanich <jsujjavanich@syntech-fuelmaster.com> Signed-off-by: Greg Ungerer <gerg@uclinux.org>
2010-08-14Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds
* 'next-spi' of git://git.secretlab.ca/git/linux-2.6: spi/amba_pl022: Fix probe and remove hook section annotations. spi/mpc5121: change annotations for probe and remove functions spi/bitbang: reinitialize transfer parameters for every message spi/spi-gpio: add support for controllers without MISO or MOSI pin spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modes SPI100k: Fix 8-bit and RX-only transfers spi/mmc_spi: mmc_spi adaptations for SPI bus locking API spi/mmc_spi: SPI bus locking API, using mutex Fix trivial conflict in drivers/spi/mpc512x_psc_spi.c due to 'struct of_device' => 'struct platform_device' rename and __init/__exit to __devinit/__devexit fix.
2010-08-06of/device: Replace struct of_device with struct platform_deviceGrant Likely
of_device is just an alias for platform_device, so remove it entirely. Also replace to_of_device() with to_platform_device() and update comment blocks. This patch was initially generated from the following semantic patch, and then edited by hand to pick up the bits that coccinelle didn't catch. @@ @@ -struct of_device +struct platform_device Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Reviewed-by: David S. Miller <davem@davemloft.net>
2010-08-01of/address: Clean up function declarationsGrant Likely
This patch moves the declaration of of_get_address(), of_get_pci_address(), and of_pci_address_to_resource() out of arch code and into the common linux/of_address header file. This patch also fixes some of the asm/prom.h ordering issues. It still includes some header files that it ideally shouldn't be, but at least the ordering is consistent now so that of_* overrides work. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-08-01spi/amba_pl022: Fix probe and remove hook section annotations.Kevin Wells
Probe and remove hooks belong in the __devinit and __devexit sections respectively. This patch fixes incorrect annotations on the pl022 spi driver. Signed-off-by: Kevin Wells <wellsk40@gmail.com> Acked-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-30of/spi: call of_register_spi_devices() from spi core codeAnatolij Gustschin
Move of_register_spi_devices() call from drivers to spi_register_master(). Also change the function to use the struct device_node pointer from master spi device instead of passing it as function argument. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-25Merge commit 'v2.6.35-rc6' into spi/testGrant Likely
2010-07-11powerpc/cpm: Reintroduce global spi_pram struct (fixes build issue)Anton Vorontsov
spi_t was removed in commit 644b2a680ccc51a9ec4d6beb12e9d47d2dee98e2 ("powerpc/cpm: Remove SPI defines and spi structs"), the commit assumed that spi_t isn't used anywhere outside of the spi_mpc8xxx driver. But it appears that the struct is needed for micropatch code. So, let's reintroduce the struct. Fixes the following build issue: CC arch/powerpc/sysdev/micropatch.o micropatch.c: In function 'cpm_load_patch': micropatch.c:629: error: expected '=', ',', ';', 'asm' or '__attribute__' before '*' token micropatch.c:629: error: 'spp' undeclared (first use in this function) micropatch.c:629: error: (Each undeclared identifier is reported only once micropatch.c:629: error: for each function it appears in.) Reported-by: LEROY Christophe <christophe.leroy@c-s.fr> Reported-by: Tony Breeds <tony@bakeyournoodle.com> Cc: <stable@kernel.org> [ .33, .34 ] Signed-off-by: Anton Vorontsov <avorontsov@mvista.com> Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
2010-07-05spi/mpc5121: change annotations for probe and remove functionsAnatolij Gustschin
Change annotations from __init/__exit to __devinit/__devexit to get rid of section mismatch warning. Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-03spi/bitbang: reinitialize transfer parameters for every messageBrian Niebuhr
This patch fixes the setup_transfer logic to account for the case where multiple messages to different SPI devices are in the queue simultaneously. With the current logic, the second message in the queue will end up using the transfer parameters for the previous message in the queue. The fix is to reinitialize the transfer parameters for each message rather than only once on the first message. Signed-off-by: Brian Niebuhr <bniebuhr@efjohnson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-03spi/spi-gpio: add support for controllers without MISO or MOSI pinMarek Szyprowski
There are some boards that do not strictly follow SPI standard and use only 3 wires (SCLK, MOSI or MISO, SS) for connecting some simple auxiliary chips and controls them with GPIO based 'spi controller'. In this configuration the MISO or MOSI line is missing (it is not required if the chip does not transfer any data back to host or host only reads data from chip). This patch adds support for such non-standard configuration in GPIO-based SPI controller. It has been tested in configuration without MISO pin. Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-03spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modesMarek Szyprowski
This patch adds a new flags argument to bitbang_txrx_be_cpha0 and bitbang_txrx_be_cpha1 transfer functions. This enables support for SPI_MASTER_NO_{TX,RX} transfer modes. The change should have no impact on speed of the existing drivers. bitbank_txrx_* functions are usually inlined into the drivers. When the argument is equal to constant zero, the optimizer would be able to eliminate the dead code (flags checks) easily. Tested on ARM and GCC 4.4.x and in all cases the checks were eliminated in the inlined function. Reviewed-by: Kyungmin Park <kyungmin.park@samsung.com> Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-07-03SPI100k: Fix 8-bit and RX-only transfersCory Maccarrone
This change fixes 8-bit transfers and RX-only transfers. The SPI100k framework requires minimum 16-bit words to be written, so 8-bit transfers must be shited by 8 bits and sent out as a 16-bit word. Additionally, receive-only transfers were failing due to the perceived need to fill the TX buffer with something. This is in fact not needed. Signed-off-by: Cory Maccarrone <darkstar6262@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-06-28spi/mmc_spi: SPI bus locking API, using mutexErnst Schwab
SPI bus locking API to allow exclusive access to the SPI bus, especially, but not limited to, for the mmc_spi driver. Coded according to an outline from Grant Likely; here is his specification (accidentally swapped function names corrected): It requires 3 things to be added to struct spi_master. - 1 Mutex - 1 spin lock - 1 flag. The mutex protects spi_sync, and provides sleeping "for free" The spinlock protects the atomic spi_async call. The flag is set when the lock is obtained, and checked while holding the spinlock in spi_async(). If the flag is checked, then spi_async() must fail immediately. The current runtime API looks like this: spi_async(struct spi_device*, struct spi_message*); spi_sync(struct spi_device*, struct spi_message*); The API needs to be extended to this: spi_async(struct spi_device*, struct spi_message*) spi_sync(struct spi_device*, struct spi_message*) spi_bus_lock(struct spi_master*) /* although struct spi_device* might be easier */ spi_bus_unlock(struct spi_master*) spi_async_locked(struct spi_device*, struct spi_message*) spi_sync_locked(struct spi_device*, struct spi_message*) Drivers can only call the last two if they already hold the spi_master_lock(). spi_bus_lock() obtains the mutex, obtains the spin lock, sets the flag, and releases the spin lock before returning. It doesn't even need to sleep while waiting for "in-flight" spi_transactions to complete because its purpose is to guarantee no additional transactions are added. It does not guarantee that the bus is idle. spi_bus_unlock() clears the flag and releases the mutex, which will wake up any waiters. The difference between spi_async() and spi_async_locked() is that the locked version bypasses the check of the lock flag. Both versions need to obtain the spinlock. The difference between spi_sync() and spi_sync_locked() is that spi_sync() must hold the mutex while enqueuing a new transfer. spi_sync_locked() doesn't because the mutex is already held. Note however that spi_sync must *not* continue to hold the mutex while waiting for the transfer to complete, otherwise only one transfer could be queued up at a time! Almost no code needs to be written. The current spi_async() and spi_sync() can probably be renamed to __spi_async() and __spi_sync() so that spi_async(), spi_sync(), spi_async_locked() and spi_sync_locked() can just become wrappers around the common code. spi_sync() is protected by a mutex because it can sleep spi_async() needs to be protected with a flag and a spinlock because it can be called atomically and must not sleep Signed-off-by: Ernst Schwab <eschwab@online.de> [grant.likely@secretlab.ca: use spin_lock_irqsave()] Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Tested-by: Matt Fleming <matt@console-pimps.org> Tested-by: Antonio Ospite <ospite@studenti.unina.it>
2010-06-02of/spi: mpc512x_psc_spi.c: Fix build failuresAnatolij Gustschin
Fixes build errors caused by the: - OF device_node pointer being moved into struct device - removal of the match_table field from struct of_platform_driver Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-06-02of/spi: Fix build failure on spi_ppc4xx.cGrant Likely
This patch fixes a build error caused by the OF device_node pointer being moved into struct device. Fixes bug introduced by commit 61c7a080a5a061c976988fd4b844dfb468dda255 (of: Always use 'struct device.of_node' to get device node pointer) Signed-off-by: Grant Likely <grant.likely@secretlab.ca> CC: Sean MacLennan <smaclennan@pikatech.com> CC: spi-devel-general@lists.sourceforge.net CC: devicetree-discuss@lists.ozlabs.org
2010-05-25spi/xilinx: Fix compile errorGrant Likely
Commit 58f9b0b02414062eaff46716bc04b47d7e79add5, "of: eliminate of_device->node and dev_archdata->{of,prom}_node" changed the location of the device_node pointer. Most drivers were converted to the new location, but the xilinx_spi_of driver was missed and now fails to compile. This patch fixes up the xilinx_spi_of driver to use the new location. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-25Merge remote branch 'origin' into secretlab/next-spiGrant Likely
2010-05-25spi/davinci: Fix clock prescale factor computationThomas Koeller
Computation of the clock prescaler value returned bogus results if the requested SPI clock was impossible to set. It now sets either the maximum or minimum clock frequency, as appropriate. Signed-off-by: Thomas Koeller <thomas.koeller@baslerweb.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
2010-05-25spi: move bitbang txrx utility functions to private headerhartleys
A number of files in drivers/spi fail checkincludes.pl due to the double include of <linux/spi/spi_bitbang.h>. The first include is needed to get the struct spi_bitbang definition and the spi_bitbang_* function prototypes. The second include happens after defining EXPAND_BITBANG_TXRX to get the inlined bitbang_txrx_* utility functions. The <linux/spi/spi_bitbang.h> header is also included by a number of other spi drivers, as well as some arch/ code, in order to use struct spi_bitbang and the associated functions. To fix the double include, and remove any potential confusion about it, move the inlined bitbang_txrx_* functions to a new private header in drivers/spi and also remove the need to define EXPAND_BITBANG_TXRX. Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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