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* spi-gpio: allow operation without CS signalMichael Buesch2009-04-031-8/+13
| | | | | | | | | | | | | | | | | | | Change spi-gpio so that it is possible to drive SPI communications over GPIO without the need for a chipselect signal. This is useful in very small setups where there's only one slave device on the bus. This patch does not affect existing setups. I use this for a tiny communication channel between an embedded device and a microcontroller. There are not enough GPIOs available for chipselect and it's not needed anyway in this case. Signed-off-by: Michael Buesch <mb@bu3sch.de> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi_mpc83xx: add OF platform driver bindingsAnton Vorontsov2009-04-011-36/+294
| | | | | | | | | | | | | | | | Implement full support for OF SPI bindings. Now the driver can manage its own chip selects without any help from the board files and/or fsl_soc constructors. The "legacy" code is well isolated and could be removed as time goes by. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> 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>
* spi_mpc83xx: rework chip selects handlingAnton Vorontsov2009-04-011-13/+7
| | | | | | | | | | | | | | | | | | The main purpose of this patch is to pass 'struct spi_device' to the chip select handling routines. This is needed so that we could implement full-fledged OpenFirmware support for this driver. While at it, also: - Replace two {de,activate}_cs routines by single cs_contol(). - Don't duplicate platform data callbacks in mpc83xx_spi struct. Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> 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>
* spi_mpc83xx: fix sparse warningsAnton Vorontsov2009-04-011-7/+9
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The patch fixes following sparse warnings: CHECK spi_mpc83xx.c spi_mpc83xx.c:145:1: warning: symbol 'mpc83xx_spi_rx_buf_u8' was not declared. Should it be static? spi_mpc83xx.c:146:1: warning: symbol 'mpc83xx_spi_rx_buf_u16' was not declared. Should it be static? spi_mpc83xx.c:147:1: warning: symbol 'mpc83xx_spi_rx_buf_u32' was not declared. Should it be static? spi_mpc83xx.c:148:1: warning: symbol 'mpc83xx_spi_tx_buf_u8' was not declared. Should it be static? spi_mpc83xx.c:149:1: warning: symbol 'mpc83xx_spi_tx_buf_u16' was not declared. Should it be static? spi_mpc83xx.c:150:1: warning: symbol 'mpc83xx_spi_tx_buf_u32' was not declared. Should it be static? spi_mpc83xx.c:175:32: warning: incorrect type in initializer (different address spaces) spi_mpc83xx.c:175:32: expected void *tmp_ptr spi_mpc83xx.c:175:32: got unsigned int [noderef] <asn:2>*<noident> spi_mpc83xx.c:183:26: warning: incorrect type in argument 1 (different address spaces) spi_mpc83xx.c:183:26: expected unsigned int [noderef] [usertype] <asn:2>*reg spi_mpc83xx.c:183:26: got void *tmp_ptr spi_mpc83xx.c:184:26: warning: incorrect type in argument 1 (different address spaces) spi_mpc83xx.c:184:26: expected unsigned int [noderef] [usertype] <asn:2>*reg spi_mpc83xx.c:184:26: got void *tmp_ptr spi_mpc83xx.c:287:31: warning: incorrect type in initializer (different address spaces) spi_mpc83xx.c:287:31: expected void *tmp_ptr spi_mpc83xx.c:287:31: got unsigned int [noderef] <asn:2>*<noident> spi_mpc83xx.c:295:25: warning: incorrect type in argument 1 (different address spaces) spi_mpc83xx.c:295:25: expected unsigned int [noderef] [usertype] <asn:2>*reg spi_mpc83xx.c:295:25: got void *tmp_ptr spi_mpc83xx.c:296:25: warning: incorrect type in argument 1 (different address spaces) spi_mpc83xx.c:296:25: expected unsigned int [noderef] [usertype] <asn:2>*reg spi_mpc83xx.c:296:25: got void *tmp_ptr spi_mpc83xx.c:486:13: warning: symbol 'mpc83xx_spi_irq' was not declared. Should it be static? Signed-off-by: Anton Vorontsov <avorontsov@ru.mvista.com> Cc: David Brownell <david-b@pacbell.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Kumar Gala <galak@gate.crashing.org> 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>
* Merge commit 'origin/master' into nextBenjamin Herrenschmidt2009-03-3011-31/+32
|\ | | | | | | | | | | Manual merge of: arch/powerpc/include/asm/elf.h drivers/i2c/busses/i2c-mpc.c
| * Merge branch 'origin' into develRussell King2009-03-2811-23/+25
| |\ | | | | | | | | | | | | Conflicts: sound/soc/pxa/pxa2xx-i2s.c
| | * spi: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-03-2511-23/+25
| | | | | | | | | | | | | | | | | | | | | Cc: dbrownell@users.sourceforge.net Cc: spi-devel-general@lists.sourceforge.net Acked-by: Greg Kroah-Hartman <gregkh@suse.de> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org>
| * | Merge branch 'omap-clks3' into develRussell King2009-03-192-6/+7
| |\ \ | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/mach-omap2/clock.c
| | * | [ARM] omap: spi: arrange for omap_uwire to use connection IDRussell King2009-02-081-4/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | ... which now means no driver requests the "armxor_ck" clock directly. Also, fix the error handling for clk_get(), ensuring that we propagate the error returned from clk_get(). Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * | [ARM] omap: mcspi: new short connection id namesRussell King2009-02-081-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | ... rather than the clock names themselves. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| * | | Merge branch 'for-rmk' of git://git.pengutronix.de/git/imx/linux-2.6 into develRussell King2009-03-131-1/+1
| |\ \ \ | | | |/ | | |/| | | | | | | | | | | | | Conflicts: arch/arm/mach-at91/gpio.c
| * | | [ARM] pxa: move DMA registers definitions into <mach/dma.h>Eric Miao2009-03-091-2/+0
| | |/ | |/| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | 1. Driver code where pxa_request_dma() is called will most likely reference DMA registers as well, and it is really unnecessary to include pxa-regs.h just for this. Move the definitions into <mach/dma.h> and make relevant drivers include it instead of <mach/pxa-regs.h>. 2. Introduce DMAC_REGS_VIRT as the virtual address base for these DMA registers. This allows later processors to re-use the same IP while registers may start at different I/O address. Signed-off-by: Eric Miao <eric.miao@marvell.com>
* | | powerpc/virtex/spi: Xilinx SPI driver not releasing memoryJohn Linn2009-03-111-2/+7
| |/ |/| | | | | | | | | | | | | | | The driver was not releasing memory when it was removed or when there was a failure during probe. This fixes it. Signed-off-by: John Linn <john.linn@xilinx.com> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
* | spi-gpio: sanitize MISO bitvalueMichael Buesch2009-02-191-1/+1
|/ | | | | | | | | | gpio_get_value() returns 0 or nonzero, but getmiso() expects 0 or 1. Sanitize the value to a 0/1 boolean. Signed-off-by: Michael Buesch <mb@bu3sch.de> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* spi: Move at25 (for SPI eeproms) to /drivers/misc/eepromWolfram Sang2009-01-263-401/+0
| | | | | Signed-off-by: Wolfram Sang <w.sang@pengutronix.de> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* atmel_spi: allow transfer when max_speed_hz = 0Stanislaw Gruszka2009-01-161-2/+1
| | | | | | | | | | | | | | | | | | | | | For some reason I have to slowdown clock to touchscreen device. In atmel_spi_setup() there is comment that max_speed_hz == 0 means as slow as possible and divider is set to maximum value. But in atmel_spi_transfer() function is check against not zero max_speed_hz with EINVAL returned. Probably driver should setup divider for each transfer based on transfer->speed_hz value, but I think that would be not necessary overhead as all used devices have constant clock. Below patch works fine for me. Signed-off-by: Stanislaw Gruszka <stf_xl@wp.pl> Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Xilinx: SPI: updated driver for device treeJohn Linn2009-01-101-56/+81
| | | | | | The driver was updated to use the device tree rather than the platform data. Signed-off-by: John Linn <john.linn@xilinx.com>
* hwmon: (lm70) Code streamlining and cleanupKaiwan N Billimoria2009-01-071-21/+12
| | | | | | | | | | | | | | This fixes a byteswap bug in the LM70 temperature sensor driver, which was previously covered up by a converse bug in the driver for the LM70EVAL-LLP board (which is also fixed). Other fixes: doc updates, remove an annoying msleep(), and improve three-wire protocol handling. Signed-off-by: Kaiwan N Billimoria <kaiwan@designergraphix.com> [ dbrownell@users.sourceforge.net: doc and whitespace tweaks ] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Jean Delvare <khali@linux-fr.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds2009-01-074-14/+12
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (60 commits) uio: make uio_info's name and version const UIO: Documentation for UIO ioport info handling UIO: Pass information about ioports to userspace (V2) UIO: uio_pdrv_genirq: allow custom irq_flags UIO: use pci_ioremap_bar() in drivers/uio arm: struct device - replace bus_id with dev_name(), dev_set_name() libata: struct device - replace bus_id with dev_name(), dev_set_name() avr: struct device - replace bus_id with dev_name(), dev_set_name() block: struct device - replace bus_id with dev_name(), dev_set_name() chris: struct device - replace bus_id with dev_name(), dev_set_name() dmi: struct device - replace bus_id with dev_name(), dev_set_name() gadget: struct device - replace bus_id with dev_name(), dev_set_name() gpio: struct device - replace bus_id with dev_name(), dev_set_name() gpu: struct device - replace bus_id with dev_name(), dev_set_name() hwmon: struct device - replace bus_id with dev_name(), dev_set_name() i2o: struct device - replace bus_id with dev_name(), dev_set_name() IA64: struct device - replace bus_id with dev_name(), dev_set_name() i7300_idle: struct device - replace bus_id with dev_name(), dev_set_name() infiniband: struct device - replace bus_id with dev_name(), dev_set_name() ISDN: struct device - replace bus_id with dev_name(), dev_set_name() ...
| * spi: struct device - replace bus_id with dev_name(), dev_set_name()Kay Sievers2009-01-064-14/+12
| | | | | | | | | | | | Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Kay Sievers <kay.sievers@vrfy.org> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | drivers/spi: move a dereference below a NULL testJulia Lawall2009-01-071-1/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | In each case, if the NULL test is necessary, then the dereference should be moved below the NULL test. The semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @@ type T; expression E; identifier i,fld; statement S; @@ - T i = E->fld; + T i; ... when != E when != i if (E == NULL) S + i = E->fld; // </smpl> Signed-off-by: Julia Lawall <julia@diku.dk> Acked-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | spi: use generic gpio calls in spi_s3c24xx_gpioBen Dooks2009-01-071-9/+29
| | | | | | | | | | | | | | | | | | | | Change the spi_s3c2410 driver to use the generic gpio calls that are now available. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | spi: atmel_spi update chipselect handlingHaavard Skinnemoen2009-01-071-26/+67
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This solves several issues: * It fixes the wrong idle clock polarity issue in a cleaner and less expensive way. * It handles the AT32AP7000 errata "SPI Chip Select 0 BITS field overrides other Chip Selects". Other chips, e.g. AT91SAM9261, have similar issues. Currently, the AT91RM9200 code path is left alone. But it might be interesting to try the same technique on RM9200 using a different CSR register. [dbrownell@users.sourceforge.net: restore debug message for activation] Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | atmel_spi: clean up SPIv1 quirk handlingHaavard Skinnemoen2009-01-071-18/+22
| | | | | | | | | | | | | | | | | | | | | | | | | | | | Currently, we have a flag called "new_1" which is basically equivalent to cpu_is_at91rm9200(). The latter is also called directly a few places. Clean up this mess by introducing a atmel_spi_v2() function for determining the controller version, and move all version dependent code over to use it. This allows us to remove the new_1 flag. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | spi_gpio driverDavid Brownell2009-01-073-1/+378
|/ | | | | | | | | | | | | | | | | | | | | | | | | | | | | Generalize the old at91rm9200 "bootstrap" bitbanging SPI master driver as "spi_gpio", so it works with arbitrary GPIOs and can be configured through platform_data. Such SPI masters support: - any number of bus instances (bus_num is the platform_device.id) - any number of chipselects (one GPIO per spi_device) - all four SPI_MODE values, and SPI_CS_HIGH - i/o word sizes from 1 to 32 bits; - devices configured as with any other spi_master controller When configured using platform_data, this provides relatively low clock rates. On platforms that support inlined GPIO calls, significantly improved transfer speeds are also possible with a semi-custom driver. (It's still painful when accessing flash memory, but less so.) Sanity checked by using this version to replace both native controllers on a board with six different SPI slaves, relying on three different SPI_MODE_* values and both SPI_CS_HIGH settings for correct operation. [akpm@linux-foundation.org: cleanups] Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Acked-by: Magnus Damm <damm@igel.co.jp> Tested-by: Magnus Damm <damm@igel.co.jp> Cc: Torgil Svensson <torgil.svensson@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.marvell.com/orion into develRussell King2008-12-135-25/+38
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| * spi: fix spi_s3c24xx_gpio num_chipselectBen Dooks2008-12-021-0/+1
| | | | | | | | | | | | | | | | | | | | The spi master driver must have num_chipselect set to allow the bus to initialise. Pass this through the platform data. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * spi: fix spi_s3c24xx_gpio device handle lookupBen Dooks2008-12-021-1/+1
| | | | | | | | | | | | | | | | | | | | | | The spidev_to_sg() call in spi_s3c24xx_gpio.c was using the wrong method to convert the spi device into the private data for the driver. Fix this by using spi_master_get_devdata. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * spi: au1550_spi full duplex dma fixJan Nikitenko2008-12-021-10/+16
| | | | | | | | | | | | | | | | | | | | | | Fix unsafe order in dma mapping operation: always flush data from the cache *BEFORE* invalidating it, to allow full duplex transfers where the same buffer may be used for both writes and reads. Tested with mmc-spi. Signed-off-by: Jan Nikitenko <jan.nikitenko@gmail.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * spi: fix spi_imx probe oopsingJulien Boibessot2008-12-021-12/+13
| | | | | | | | | | | | | | | | | | | | | | Corrects spi_imx driver oops during initialization/probing: can't use drv_data before it's allocated. Signed-off-by: Julien Boibessot <julien.boibessot@armadeus.com> Acked-by: Sascha Hauer <s.hauer@pengutronix.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * spi: mpc52xx_psc_spi chipselect bugfixStefano Babic2008-12-021-1/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | According to the manual the "tdfOnExit" flag must be set on the last byte we want to send. The PSC controller holds SS low until the flag is set. However, the flag was set always on the last byte of the FIFO, independently if it is the last byte of the transfer. This generates spurious toggling of the SS signals that breaks the protocol of some peripherals. Fix. Signed-off-by: Stefano Babic <sbabic@denx.de> Acked-by: Grant Likely <grant.likely@secretlab.ca> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| * spi: avoid spidev crash when device is removedWolfgang Ocker2008-12-021-1/+3
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | I saw a kernel oops in spidev_remove() when a spidev device was registered and I unloaded the SPI master driver: Unable to handle kernel paging request for data at address 0x00000004 Faulting instruction address: 0xc01c0c50 Oops: Kernel access of bad area, sig: 11 [#1] CDSPR Modules linked in: spi_ppc4xx(-) NIP: c01c0c50 LR: c01bf9e4 CTR: c01c0c34 REGS: cec89c30 TRAP: 0300 Not tainted (2.6.27.3izt) MSR: 00021000 <ME> CR: 24000228 XER: 20000007 DEAR: 00000004, ESR: 00800000 TASK = cf889040[2070] 'rmmod' THREAD: cec88000 GPR00: 00000000 cec89ce0 cf889040 cec8e000 00000004 cec8e000 ffffffff 00000000 GPR08: 0000001c c0336380 00000000 c01c0c34 00000001 1001a338 100e0000 100df49c GPR16: 100b54c0 100df49c 100ddd20 100f05a8 100b5340 100efd68 00000000 00000000 GPR24: 100ec008 100f0428 c0327788 c0327794 cec8e0ac cec8e000 c0336380 00000000 NIP [c01c0c50] spidev_remove+0x1c/0xe4 LR [c01bf9e4] spi_drv_remove+0x2c/0x3c Call Trace: [cec89d00] [c01bf9e4] spi_drv_remove+0x2c/0x3c [cec89d10] [c01859a0] __device_release_driver+0x78/0xb4 [cec89d20] [c0185ab0] device_release_driver+0x28/0x44 [cec89d40] [c0184be8] bus_remove_device+0xac/0xd8 [cec89d60] [c0183094] device_del+0x100/0x194 [cec89d80] [c0183140] device_unregister+0x18/0x30 [cec89da0] [c01bf30c] __unregister+0x20/0x34 [cec89db0] [c0182778] device_for_each_child+0x38/0x74 [cec89de0] [c01bf2d0] spi_unregister_master+0x28/0x44 [cec89e00] [c01bfeac] spi_bitbang_stop+0x1c/0x58 [cec89e20] [d908a5e0] spi_ppc4xx_of_remove+0x24/0x7c [spi_ppc4xx] [...] IMHO a call to spi_set_drvdata() is missing in spidev_probe(). The patch below helped. Signed-off-by: Wolfgang Ocker <weo@reccoware.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | Merge branch 's3c-moves2' of git://aeryn.fluff.org.uk/bjdooks/linux into develRussell King2008-11-291-1/+1
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| * | [ARM] S3C: Move plat/regs-spi.h to arch/arm/plat-s3c/include/plat.Ben Dooks2008-10-301-1/+1
| | | | | | | | | | | | | | | | | | | | | Move plat/regs-spi.h to arch/arm/plat-s3c/include/plat ready ready to clean out old include directories. Signed-off-by: Ben Dooks <ben-linux@fluff.org>
* | | [ARM] Hide ISA DMA API when ISA_DMA_API is unsetRussell King2008-11-291-1/+1
| |/ |/| | | | | | | | | | | | | | | | | | | | | | | When ISA_DMA_API is unset, we're not implementing the ISA DMA API, so there's no point in publishing the prototypes via asm/dma.h, nor including the machine dependent parts of that API. This allows us to remove a lot of mach/dma.h files which don't contain any useful code. Unfortunately though, some platforms put their own private non-ISA definitions into mach/dma.h, so we leave these behind and fix the appropriate #include statments. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | spi_imx: full duplex dma corruption bugfixAndrea Paterniani2008-11-201-23/+22
| | | | | | | | | | | | | | | | | | | | | | Fix unsafe order in dma mapping operation: always flush data from the cache *BEFORE* invalidating it, to allow full duplex transfers where the same buffer may be used for both writes and reads. Signed-off-by: Andrea Paterniani <a.paterniani@swapp-eng.it> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | pxa2xx_spi: bugfix full duplex dma data corruptionNed Forrester2008-11-201-12/+12
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Fixes a data corruption bug in pxa2xx_spi.c when operating in full duplex mode with DMA and using buffers that overlap. SPI transmit and receive buffers are allowed to be the same or to overlap. However, this driver fails if such overlap is attempted in DMA mode because it maps the rx and tx buffers in the wrong order. By mapping DMA_FROM_DEVICE (read) before DMA_TO_DEVICE (write), it invalidates the cache before flushing it, thus discarding data which should have been transmitted. The patch corrects the order of mapping. This bug exists in all versions of pxa2xx_spi.c; similar bugs are in the drivers for two other SPI controllers (au1500, imx). A version of this patch has been tested on kernel 2.6.20 using verification of loopback data with: random transfer length, random bits-per-word, random positive offsets (both larger and smaller than transfer length) between the start of the rx and tx buffers, and varying clock rates. Signed-off-by: Ned Forrester <nforrester@whoi.edu> Cc: Vernon Sauder <vernoninhand@gmail.com> Cc: J. Scott Merritt <merrij3@rpi.edu> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Cc: <stable@kernel.org> [2.6.27.x] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | atmel_spi: work-around required for new HW bug in AT91SAM9263 Rev.B SPI ↵Jean-Christophe Lallemand2008-11-131-0/+3
|/ | | | | | | | | | | | | | | | | | | | | | | | | | controller We're working with an AT91SAM9263 Rev B in our design and I experienced some inconsistency in spi-based touchscreen usage between our board and the Atmel evaluation kit we have that runs on a Rev A chip. The data was apparently delayed by 1 byte and got ridiculous data out of the touchscreen driver, very strange. As everything looked normal in the spi, touchscreen and dma logs, I contacted the Atmel support and they triggered me on a new HW bug that appeared in the Rev B SPI controller. The problem is that the SPI controller on the Rev B needs that the software reset is performed two times so that it's performed correctly. Applying the patch below solves the issue on my Rev B board. I've tested it as well on my Rev A evaluation kit and it has apparently no unwanted side effect, things continue to work as expected. Signed-off-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Cc: David Brownell <david-b@pacbell.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* Merge git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6Linus Torvalds2008-10-161-4/+3
|\ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core-2.6: (46 commits) UIO: Fix mapping of logical and virtual memory UIO: add automata sercos3 pci card support UIO: Change driver name of uio_pdrv UIO: Add alignment warnings for uio-mem Driver core: add bus_sort_breadthfirst() function NET: convert the phy_device file to use bus_find_device_by_name kobject: Cleanup kobject_rename and !CONFIG_SYSFS kobject: Fix kobject_rename and !CONFIG_SYSFS sysfs: Make dir and name args to sysfs_notify() const platform: add new device registration helper sysfs: use ilookup5() instead of ilookup5_nowait() PNP: create device attributes via default device attributes Driver core: make bus_find_device_by_name() more robust usb: turn dev_warn+WARN_ON combos into dev_WARN debug: use dev_WARN() rather than WARN_ON() in device_pm_add() debug: Introduce a dev_WARN() function sysfs: fix deadlock device model: Do a quickcheck for driver binding before doing an expensive check Driver core: Fix cleanup in device_create_vargs(). Driver core: Clarify device cleanup. ...
| * device create: misc: convert device_create_drvdata to device_createGreg Kroah-Hartman2008-10-161-4/+3
| | | | | | | | | | | | | | | | Now that device_create() has been audited, rename things back to the original call to be sane. Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
* | Merge branch 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-armLinus Torvalds2008-10-162-6/+35
|\ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | * 'for-linus' of master.kernel.org:/home/rmk/linux-2.6-arm: (51 commits) [ARM] 5308/1: Fix Viper ISA IRQ handling [ARM] 5307/1: pxa: fix CM-X2XX PCMCIA build error [ARM] 5306/1: pxa: fix build error on CM-X270 [ARM] 5302/1: ARM: OMAP: Revert omap3 WDT changes to avoid merge conflict [ARM] 5305/1: ARM: OMAP: Fix compile of McBSP by removing unnecessary check [ARM] 5301/1: ARM: OMAP: Add missing irq defines ARM: OMAP3: Add default kernel config for OMAP LDP ARM: OMAP3: Add basic board support for OMAP LDP ARM: OMAP3: Defconfig for the Gumstix Overo board (rev 3) ARM: OMAP3: Add support for the Gumstix Overo board (rev 3) ARM: OMAP3: Add Beagle defconfig ARM: OMAP3: Add minimal Beagle board support ARM: OMAP3: Add minimal omap3430 support ARM: OMAP2: Fix sparse, checkpatch warnings in OMAP2/3 IRQ code ARM: OMAP: Fixes to omap_mcbsp_request function ARM: OMAP: Add support for OMAP2430 in McBSP ARM: OMAP: Add support for McBSP devices 3 - 5 on 34xx ARM: OMAP: Allocate McBSP devices dynamically Fix sections for omap-mcbsp platform driver [ARM] S3C24XX: Additional include moves ...
| * \ Merge branch 's3c-move' into develRussell King2008-10-142-3/+3
| |\ \ | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/mach-versatile/core.c
| * \ \ Merge branch 'omap-all' into develRussell King2008-10-142-6/+35
| |\ \ \ | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Conflicts: arch/arm/mach-omap2/gpmc.c arch/arm/mach-omap2/irq.c
| | * | | [ARM] omap: convert OMAP drivers to use ioremap()Russell King2008-09-052-5/+30
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| | * | | [ARM] omap: remove an io_v2p() usageRussell King2008-09-051-1/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | When omap_udc is also incorporated, this macro will no longer be used. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
* | | | | spi: core and gpio expanders use subsys_initDavid Brownell2008-10-161-1/+1
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the SPI external GPIO expander drivers register themselves at subsys_initcall() time when they're statically linked, and make the SPI core do its driver model initialization earlier so that's safe. SOC-integrated GPIOs are available starting very early -- often before initcalls start to run, or earily in arch_initcall() at latest -- so this improves consistency, letting more subsystems rely on GPIOs being usable by their own subsys_initcall() code. Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | orion_spi: handle 88F6183 erratumLennert Buytenhek2008-10-161-0/+5
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add support to orion_spi for the 88F6183 ARM SoC by adding code to work around a 6183-specific erratum. Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | pxa2xx_spi: fix chip_info defaults and documentation.Vernon Sauder2008-10-161-19/+27
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Make the chip info structure data optional by providing reasonable defaults. Improve corresponding documentation, and highlight the drawback of not providing explicit chipselect control. DMA can determine appropriate dma_burst_size and thresholds automatically so use DMA even if dma_burst_size is not specified. Signed-off-by: Vernon Sauder <VernonInHand@gmail.com> Reviewed-by: Ned Forrester <nforrester@whoi.edu> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | pxa2xx_spi: minor cleanupGuennadi Liakhovetski2008-10-161-4/+4
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Minor fixes: remove redundant local variable initialization, fix "can not" to what I _think_ is a preferred spelling, output IRQ number if requesting it failed. Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@pengutronix.de> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
* | | | | spi_s3c24xx: pin configuration updatesBen Dooks2008-10-161-0/+6
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | Add a pin configuration callback for the s3c24xx SPI driver, as there are several options depending on the channel and the chip in use. This is needed as the controller may not have been setup by the initial bootloader and the fact that the SPI controller gets reset over suspend/resume into slave mode but the GPIO function registers do not. Signed-off-by: Ben Dooks <ben-linux@fluff.org> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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