Commit graph

570 commits

Author SHA1 Message Date
Linus Walleij
25c8e03bdb spi/pl022: move probe call to subsys_initcall()
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>
2010-09-08 22:50:10 -06:00
Linus Walleij
545074fb95 spi/pl022: fix APB pclk power regression on U300
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>
2010-09-08 12:24:30 -06:00
Mark Brown
be7852a839 spi/spi_s3c64xx: Warn if PIO transfers time out
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>
2010-09-08 12:23:03 -06:00
Jassi Brar
c3f139b655 spi/s3c64xx: Fix incorrect reuse of 'val' local variable.
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>
2010-09-08 12:05:02 -06:00
Jassi Brar
251ee478f2 spi/s3c64xx: Fix compilation warning
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>
2010-09-08 12:03:45 -06:00
Feng Tang
e3e55ff585 spi/dw_spi: clean the cs_control code
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>
2010-09-08 10:50:00 -06:00
Yong Wang
cbcc062abb spi/dw_spi: Allow interrupt sharing
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>
2010-09-08 10:49:50 -06:00
Mark Brown
9d8f86b560 spi/spi_s3c64xx: Increase dead reckoning time in wait_for_xfer()
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>
2010-09-08 10:00:15 -06:00
Mark Brown
d2a787fc57 spi/spi_s3c64xx: Move to subsys_initcall()
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>
2010-09-08 09:59:37 -06:00
David Lamparter
34860089c9 spi: free children in spi_unregister_master, not siblings
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>
2010-09-01 09:15:24 -06:00
Mark Brown
8944f4f3d9 spi/spi_s3c64xx: Staticise non-exported functions
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>
2010-09-01 08:55:23 -06:00
Mark Brown
cc0fc0bbeb spi/spi_s3c64xx: Make probe more robust against missing board config
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>
2010-09-01 08:55:22 -06:00
Greg Ungerer
5e1c53356d m68knommu: include sched.h in ColdFire/SPI driver
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>
2010-08-18 12:44:31 +10:00
Linus Torvalds
b171aa2770 Merge branch 'next-spi' of git://git.secretlab.ca/git/linux-2.6
* '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.
2010-08-14 11:54:09 -07:00
Grant Likely
2dc1158137 of/device: Replace struct of_device with struct platform_device
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>
2010-08-06 09:25:50 -06:00
Grant Likely
22ae782f86 of/address: Clean up function declarations
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>
2010-08-01 01:42:42 -06:00
Kevin Wells
b4225885de spi/amba_pl022: Fix probe and remove hook section annotations.
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>
2010-08-01 01:35:29 -06:00
Anatolij Gustschin
12b15e8328 of/spi: call of_register_spi_devices() from spi core code
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>
2010-07-30 00:03:59 -06:00
Grant Likely
5ffdcd94ea Merge commit 'v2.6.35-rc6' into spi/test 2010-07-25 17:52:21 -06:00
Anton Vorontsov
56825c88ff powerpc/cpm: Reintroduce global spi_pram struct (fixes build issue)
spi_t was removed in commit 644b2a680c
("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>
2010-07-11 11:03:22 -05:00
Anatolij Gustschin
cf40f082f8 spi/mpc5121: change annotations for probe and remove functions
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>
2010-07-05 11:34:07 -06:00
Brian Niebuhr
b8f2e7bb6c spi/bitbang: reinitialize transfer parameters for every message
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>
2010-07-03 22:59:18 -06:00
Marek Szyprowski
3c8e1a84fd spi/spi-gpio: add support for controllers without MISO or MOSI pin
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>
2010-07-03 22:45:44 -06:00
Marek Szyprowski
04bb2a031c spi/bitbang: add support for SPI_MASTER_NO_{TX, RX} modes
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>
2010-07-03 22:45:44 -06:00
Cory Maccarrone
5c2818cdfa SPI100k: Fix 8-bit and RX-only transfers
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>
2010-07-03 22:45:44 -06:00
Ernst Schwab
cf32b71e98 spi/mmc_spi: SPI bus locking API, using mutex
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>
2010-06-28 17:49:29 -07:00
Anatolij Gustschin
ef7f2e831c of/spi: mpc512x_psc_spi.c: Fix build failures
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>
2010-06-02 13:45:06 -06:00
Grant Likely
b53550781b of/spi: Fix build failure on spi_ppc4xx.c
This patch fixes a build error caused by the OF device_node pointer
being moved into struct device.

Fixes bug introduced by commit 61c7a080a5
(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
2010-06-02 13:38:33 -06:00
Grant Likely
bf6a67ee34 spi/xilinx: Fix compile error
Commit 58f9b0b024, "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>
2010-05-25 00:48:24 -06:00
Grant Likely
b1e50ebcf2 Merge remote branch 'origin' into secretlab/next-spi 2010-05-25 00:38:26 -06:00
Thomas Koeller
0c2a2ae327 spi/davinci: Fix clock prescale factor computation
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>
2010-05-25 00:23:54 -06:00
hartleys
41c4221ca6 spi: move bitbang txrx utility functions to private header
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>
2010-05-25 00:23:17 -06:00
Anatolij Gustschin
6e27388f1b spi/mpc5121: Add SPI master driver for MPC5121 PSC
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>
2010-05-25 00:23:17 -06:00
Mika Westerberg
011f23a3c2 spi/ep93xx: implemented driver for Cirrus EP93xx SPI controller
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>
2010-05-25 00:23:16 -06:00
Scott Ellis
99f1a43f43 spi/omap2_mcspi: Check params before dereference or use
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>
2010-05-25 00:23:15 -06:00
Roman Tereshonkov
4743a0f88c spi/omap2_mcspi: add turbo mode support
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>
2010-05-25 00:23:15 -06:00
Roman Tereshonkov
8b66c13474 spi/omap2_mcspi: change default DMA_MIN_BYTES value to 160
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>
2010-05-25 00:23:14 -06:00
Grzegorz Sygieda
4a12404dda spi/pl022: fix stop queue procedure
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>
2010-05-25 00:23:14 -06:00
Linus Walleij
781c7b129b spi/pl022: add support for the PL023 derivate
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>
2010-05-25 00:23:14 -06:00
Linus Walleij
556f4aeb7d spi/pl022: fix up differences between ARM and ST versions
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>
2010-05-25 00:23:13 -06:00
Joakim Tjernlund
338ff2982d spi/spi_mpc8xxx: Do not use map_tx_dma to unmap rx_dma
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>
2010-05-25 00:23:13 -06:00
Joakim Tjernlund
0398fb7094 spi/spi_mpc8xxx: Fix QE mode Litte Endian
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>
2010-05-25 00:17:51 -06:00
Joakim Tjernlund
f9218c2a60 spi/spi_mpc8xxx: fix potential memory corruption.
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>
2010-05-22 02:18:02 -06:00
Grant Likely
cf9b59e9d3 Merge remote branch 'origin' into secretlab/next-devicetree
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>
2010-05-22 00:36:56 -06:00
Grant Likely
4018294b53 of: Remove duplicate fields from of_platform_driver
.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>
2010-05-22 00:10:40 -06:00
Linus Torvalds
a6f039869f Merge branch 'omap-for-linus' of 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
  ...
2010-05-21 10:50:00 -07:00
Tony Lindgren
f6304f5804 Merge branch 'omap4-i2c-init' into omap-for-linus 2010-05-20 11:37:23 -07:00
Syed Rafiuddin
8ebeb545a8 OMAP4: SPI: Fix Driver Kconfig
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>
2010-05-20 11:17:51 -07:00
Linus Torvalds
f39d01be4c Merge branch 'for-linus' of 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
  ...
2010-05-20 09:20:59 -07:00
Grant Likely
61c7a080a5 of: Always use 'struct device.of_node' to get device node pointer.
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>
2010-05-18 16:10:44 -06:00