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* m68knommu: include sched.h in ColdFire/SPI driverGreg Ungerer2010-08-17
| | | | | | | | | | | | | | | | 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>
* Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2010-08-14
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * '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.
| * spi/amba_pl022: Fix probe and remove hook section annotations.Kevin Wells2010-08-01
| | | | | | | | | | | | | | | | | | | | 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>
| * Merge commit 'v2.6.35-rc6' into spi/testGrant Likely2010-07-25
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| * | spi/mpc5121: change annotations for probe and remove functionsAnatolij Gustschin2010-07-05
| | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | spi/bitbang: reinitialize transfer parameters for every messageBrian Niebuhr2010-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | spi/spi-gpio: add support for controllers without MISO or MOSI pinMarek Szyprowski2010-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modesMarek Szyprowski2010-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | SPI100k: Fix 8-bit and RX-only transfersCory Maccarrone2010-07-04
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
| * | spi/mmc_spi: SPI bus locking API, using mutexErnst Schwab2010-06-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | of/device: Replace struct of_device with struct platform_deviceGrant Likely2010-08-06
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | of/address: Clean up function declarationsGrant Likely2010-08-01
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | of/spi: call of_register_spi_devices() from spi core codeAnatolij Gustschin2010-07-30
| |/ |/| | | | | | | | | | | | | | | | | 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>
* | powerpc/cpm: Reintroduce global spi_pram struct (fixes build issue)Anton Vorontsov2010-07-11
|/ | | | | | | | | | | | | | | | | | | | | | | 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>
* of/spi: mpc512x_psc_spi.c: Fix build failuresAnatolij Gustschin2010-06-02
| | | | | | | | | 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>
* of/spi: Fix build failure on spi_ppc4xx.cGrant Likely2010-06-02
| | | | | | | | | | | | | 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
* spi/xilinx: Fix compile errorGrant Likely2010-05-25
| | | | | | | | | | | | 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>
* Merge remote branch 'origin' into secretlab/next-spiGrant Likely2010-05-25
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| * Merge remote branch 'origin' into secretlab/next-devicetreeGrant Likely2010-05-22
| |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Merging in current state of Linus' tree to deal with merge conflicts and build failures in vio.c after merge. Conflicts: drivers/i2c/busses/i2c-cpm.c drivers/i2c/busses/i2c-mpc.c drivers/net/gianfar.c Also fixed up one line in arch/powerpc/kernel/vio.c to use the correct node pointer. Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
| | * Merge branch 'omap-for-linus' of ↵Linus Torvalds2010-05-21
| | |\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6 * 'omap-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tmlind/linux-omap-2.6: (113 commits) omap4: Add support for i2c init omap: Fix i2c platform init code for omap4 OMAP2 clock: fix recursive spinlock attempt when CONFIG_CPU_FREQ=y OMAP powerdomain, hwmod, omap_device: add some credits OMAP4 powerdomain: Support LOWPOWERSTATECHANGE for powerdomains OMAP3 clock: add support for setting the divider for sys_clkout2 using clk_set_rate OMAP4 powerdomain: Fix pwrsts flags for ALWAYS ON domains OMAP: timers: Fix clock source names for OMAP4 OMAP4 clock: Support clk_set_parent OMAP4: PRCM: Add offset defines for all CM registers OMAP4: PRCM: Add offset defines for all PRM registers OMAP4: PRCM: Remove duplicate definition of base addresses OMAP4: PRM: Remove MPU internal code name and apply PRCM naming convention OMAP4: CM: Remove non-functional registers in ES1.0 OMAP: hwmod: Replace WARN by pr_warning for clockdomain check OMAP: hwmod: Rename hwmod name for the MPU OMAP: hwmod: Do not exit the iteration if one clock init failed OMAP: hwmod: Replace WARN by pr_warning if clock lookup failed OMAP: hwmod: Remove IS_ERR check with omap_clk_get_by_name return value OMAP: hwmod: Fix wrong pointer iteration in oh->slaves ...
| | | * Merge branch 'omap4-i2c-init' into omap-for-linusTony Lindgren2010-05-20
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| | | * | OMAP4: SPI: Fix Driver KconfigSyed Rafiuddin2010-05-20
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Change dependency to ARCH_OMAP2PLUS to allow systems based on omap24xx, omap34xx or omap44xx Cc: spi-devel-general@lists.sourceforge.net Signed-off-by: Syed Rafiuddin <rafiuddin.syed@ti.com> Signed-off-by: Abraham Arce <x0066660@ti.com> Signed-off-by: Tony Lindgren <tony@atomide.com>
| | * | | Merge branch 'for-linus' of ↵Linus Torvalds2010-05-20
| | |\ \ \ | | | |_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jikos/trivial: (44 commits) vlynq: make whole Kconfig-menu dependant on architecture add descriptive comment for TIF_MEMDIE task flag declaration. EEPROM: max6875: Header file cleanup EEPROM: 93cx6: Header file cleanup EEPROM: Header file cleanup agp: use NULL instead of 0 when pointer is needed rtc-v3020: make bitfield unsigned PCI: make bitfield unsigned jbd2: use NULL instead of 0 when pointer is needed cciss: fix shadows sparse warning doc: inode uses a mutex instead of a semaphore. uml: i386: Avoid redefinition of NR_syscalls fix "seperate" typos in comments cocbalt_lcdfb: correct sections doc: Change urls for sparse Powerpc: wii: Fix typo in comment i2o: cleanup some exit paths Documentation/: it's -> its where appropriate UML: Fix compiler warning due to missing task_struct declaration UML: add kernel.h include to signal.c ...
| | | * | Merge branch 'master' into for-nextJiri Kosina2010-04-22
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| | | * | | Fix typos in commentsThomas Weber2010-03-16
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | [Ss]ytem => [Ss]ystem udpate => update paramters => parameters orginal => original Signed-off-by: Thomas Weber <swirl@gmx.li> Acked-by: Randy Dunlap <rdunlap@xenotime.net> Signed-off-by: Jiri Kosina <jkosina@suse.cz>
| | * | | | [ARM] pxa: add namespace on sspHaojian Zhuang2010-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In order to prevent code ambiguous, add namespace on functions in ssp driver. Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| | * | | | [ARM] pxa: move ssp into common plat-pxaHaojian Zhuang2010-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: Haojian Zhuang <haojian.zhuang@marvell.com> Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| | * | | | [ARM] pxa: merge regs-ssp.h into ssp.hEric Miao2010-05-11
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | No need to separate them as they should be together from the begining. Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| | * | | | [ARM] pxa: correct SSCR0_SCR to support multiple SoCsEric Miao2010-05-11
| | | |_|/ | | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The previous definitions of SSCR0_SCR and SSCR0_SerClkDiv() prevented them being used simultaneously when supporting multiple PXA SoCs, esp. in drivers/spi/pxa2xx_spi.c, make them correct. The change from SSCR0_SerClkDiv(2) to SSCR0_SCR(2), will make the result a little bit different in pxa2xx_spi_probe(), however, since that's only used as a default initialization value, it's acceptable. Signed-off-by: Eric Miao <eric.y.miao@gmail.com>
| * | | | of: Remove duplicate fields from of_platform_driverGrant Likely2010-05-22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | .name, .match_table and .owner are duplicated in both of_platform_driver and device_driver. This patch is a removes the extra copies from struct of_platform_driver and converts all users to the device_driver members. This patch is a pretty mechanical change. The usage model doesn't change and if any drivers have been missed, or if anything has been fixed up incorrectly, then it will fail with a compile time error, and the fixup will be trivial. This patch looks big and scary because it touches so many files, but it should be pretty safe. Signed-off-by: Grant Likely <grant.likely@secretlab.ca> Acked-by: Sean MacLennan <smaclennan@pikatech.com>
| * | | | of: Always use 'struct device.of_node' to get device node pointer.Grant Likely2010-05-18
| | |_|/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The following structure elements duplicate the information in 'struct device.of_node' and so are being eliminated. This patch makes all readers of these elements use device.of_node instead. (struct of_device *)->node (struct dev_archdata *)->prom_node (sparc) (struct dev_archdata *)->of_node (powerpc & microblaze) Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/davinci: Fix clock prescale factor computationThomas Koeller2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | | spi: move bitbang txrx utility functions to private headerhartleys2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 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>
* | | | spi/mpc5121: Add SPI master driver for MPC5121 PSCAnatolij Gustschin2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | Signed-off-by: John Rigby <jcrigby@gmail.com> Signed-off-by: Anatolij Gustschin <agust@denx.de> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/ep93xx: implemented driver for Cirrus EP93xx SPI controllerMika Westerberg2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch adds an SPI master driver for the Cirrus EP93xx SPI controller found in EP93xx chips. Signed-off-by: Mika Westerberg <mika.westerberg@iki.fi> Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com> Acked-by: H Hartley Sweeten <hsweeten@visionengravers.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/omap2_mcspi: Check params before dereference or useScott Ellis2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Check spi->chip_select for range before use. Signed-off-by: Scott Ellis <scott@jumpnowtek.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/omap2_mcspi: add turbo mode supportRoman Tereshonkov2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Turbo mode allows to read data to shift register when rx-buffer is full thus improving the perfomance. This feature is available for RX-only mode. In PIO turbo mode when the penultimate word is available in RX-buffer the controller should be disabled before reading data to prevent the next transaction triggering. The controller itself handles the last word to be correctly loaded to shift-register and then transferred to RX-buffer. The turbo mode is enabled by setting turbo_mode parameter to 1. This parameter is a part of omap2_mcspi_device_config structure which is passed through the spi_device controller_data pointer. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/omap2_mcspi: change default DMA_MIN_BYTES value to 160Roman Tereshonkov2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The value 160 has been obtained as optimal in testing it for wl1271 which use spi for communication. In some sense this change might also influence on other spi devices connected to omap2_mcspi controller. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/pl022: fix stop queue procedureGrzegorz Sygieda2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fix prevents queue being marked as "stopped", if data exists in the queue list. Signed-off-by: Grzegorz Sygieda <grzegorz.sygieda@tieto.com> Signed-off-by: Lukasz Baj <lukasz.baj@tieto.com> Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/pl022: add support for the PL023 derivateLinus Walleij2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This adds support for a further ST variant of the PL022 called PL023. Some differences in the control registers due to being stripped down to SPI mode only, and a new clock feedback sample delay config setting is available. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/pl022: fix up differences between ARM and ST versionsLinus Walleij2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The PL022 SPI driver did not cleanly separate between the original unmodified ARM version and the ST Microelectronics versions. Split this more cleanly and fix some whitespace moaning from checkpatch at the same time. Signed-off-by: Linus Walleij <linus.walleij@stericsson.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/spi_mpc8xxx: Do not use map_tx_dma to unmap rx_dmaJoakim Tjernlund2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This fixes a typo were map_tx_dma is used instead of map_rx_dma, casing the driver to unmap rx_dma when it shouldn't. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Acked-by: Anton Vorontsov <cbouatmailru@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/spi_mpc8xxx: Fix QE mode Litte EndianJoakim Tjernlund2010-05-25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | QE mode uses Little Endian so words > 8 bits are byte swapped. Workaround this by always enforcing wordsize 8 for words > 8 bits. Unfortunately this will not work for LSB transfers where wordsize is > 8 bits so disable these for now. Also move the different quirks into its own function to keep mpc8xxx_spi_setup_transfer() sane. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Acked-by: Anton Vorontsov <cbouatmailru@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | | spi/spi_mpc8xxx: fix potential memory corruption.Joakim Tjernlund2010-05-22
| |/ / |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | tx_dma/rx_dma are already set to a dummy buffer when no tx/rx buffer and t->tx_dma/t->rx_dma does not contain a dma address, but NULL. This may lead to corruption of kernel memory. Fix this by leaving tx_dma/rx_dma alone. Do not INIT_TX_RX while controller is enabled, this is bad according to the MPC8321 manual. Signed-off-by: Joakim Tjernlund <Joakim.Tjernlund@transmode.se> Acked-by: Anton Vorontsov <cbouatmailru@gmail.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | omap2_mcspi: small fixes of output data formatRoman Tereshonkov2010-04-28
| | | | | | | | | | | | | | | | | | | | | Replaces %04x by %08x for 32-bits data output. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | omap2_mcspi: Flush posted writesRoman Tereshonkov2010-04-28
| | | | | | | | | | | | | | | | | | | | | | | | mcspi_write_chconf0 is used to control rx/tx triggering. Post-write flushing is needed to get the immediate effect. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | spi: spi_device memory should be released instead of device.Roman Tereshonkov2010-04-28
| | | | | | | | | | | | | | | | | | | | | | | | | | | The memory for dev variable is allocated as a part of spi_device structure memory which the dev belongs to. Thus when the memory is released the right pointer is used. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | | spi: release device claimed by bus_find_device_by_nameRoman Tereshonkov2010-04-28
|/ / | | | | | | | | | | | | | | | | In success case the function bus_find_device_by_name calls get_device. In our context put_device should be called to decrease the device count usage. Signed-off-by: Roman Tereshonkov <roman.tereshonkov@nokia.com> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | include cleanup: Update gfp.h and slab.h includes to prepare for breaking ↵Tejun Heo2010-03-30
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | implicit slab.h inclusion from percpu.h percpu.h is included by sched.h and module.h and thus ends up being included when building most .c files. percpu.h includes slab.h which in turn includes gfp.h making everything defined by the two files universally available and complicating inclusion dependencies. percpu.h -> slab.h dependency is about to be removed. Prepare for this change by updating users of gfp and slab facilities include those headers directly instead of assuming availability. As this conversion needs to touch large number of source files, the following script is used as the basis of conversion. http://userweb.kernel.org/~tj/misc/slabh-sweep.py The script does the followings. * Scan files for gfp and slab usages and update includes such that only the necessary includes are there. ie. if only gfp is used, gfp.h, if slab is used, slab.h. * When the script inserts a new include, it looks at the include blocks and try to put the new include such that its order conforms to its surrounding. It's put in the include block which contains core kernel includes, in the same order that the rest are ordered - alphabetical, Christmas tree, rev-Xmas-tree or at the end if there doesn't seem to be any matching order. * If the script can't find a place to put a new include (mostly because the file doesn't have fitting include block), it prints out an error message indicating which .h file needs to be added to the file. The conversion was done in the following steps. 1. The initial automatic conversion of all .c files updated slightly over 4000 files, deleting around 700 includes and adding ~480 gfp.h and ~3000 slab.h inclusions. The script emitted errors for ~400 files. 2. Each error was manually checked. Some didn't need the inclusion, some needed manual addition while adding it to implementation .h or embedding .c file was more appropriate for others. This step added inclusions to around 150 files. 3. The script was run again and the output was compared to the edits from #2 to make sure no file was left behind. 4. Several build tests were done and a couple of problems were fixed. e.g. lib/decompress_*.c used malloc/free() wrappers around slab APIs requiring slab.h to be added manually. 5. The script was run on all .h files but without automatically editing them as sprinkling gfp.h and slab.h inclusions around .h files could easily lead to inclusion dependency hell. Most gfp.h inclusion directives were ignored as stuff from gfp.h was usually wildly available and often used in preprocessor macros. Each slab.h inclusion directive was examined and added manually as necessary. 6. percpu.h was updated not to include slab.h. 7. Build test were done on the following configurations and failures were fixed. CONFIG_GCOV_KERNEL was turned off for all tests (as my distributed build env didn't work with gcov compiles) and a few more options had to be turned off depending on archs to make things build (like ipr on powerpc/64 which failed due to missing writeq). * x86 and x86_64 UP and SMP allmodconfig and a custom test config. * powerpc and powerpc64 SMP allmodconfig * sparc and sparc64 SMP allmodconfig * ia64 SMP allmodconfig * s390 SMP allmodconfig * alpha SMP allmodconfig * um on x86_64 SMP allmodconfig 8. percpu.h modifications were reverted so that it could be applied as a separate patch and serve as bisection point. Given the fact that I had only a couple of failures from tests on step 6, I'm fairly confident about the coverage of this conversion patch. If there is a breakage, it's likely to be something in one of the arch headers which should be easily discoverable easily on most builds of the specific arch. Signed-off-by: Tejun Heo <tj@kernel.org> Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
* | Merge branch 'merge' of git://git.secretlab.ca/git/linux-2.6Linus Torvalds2010-03-18
|\ \ | |/ |/| | | | | | | | | | | | | | | * 'merge' of git://git.secretlab.ca/git/linux-2.6: powerpc/5200: Build fix for mpc52xx watchdog timer code of: Fix comparison of "compatible" properties powerpc/52xx: update defconfigs spi/omap2_mcspi: Use transaction speed if provided spi/omap2_mcspi: fix NULL pointer dereference uartlite: Fix build on sparc.
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