dw_spi_mmio is dependent on the clock framework. This marks it as such
in Kconfig.
Signed-off-by: NJean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Signed-off-by: NJean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Minor code style cleanups following comments by Wolfram Sang
Signed-off-by: NJean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Adds a memory-mapped I/O dw_spi platform device.
Signed-off-by: NJean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

So that interface drivers could be built as modules
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This allows the switching between transfer modes between 'transmit only',
'receive only' and 'transmit and receive' modes. Due to the design of the SPI
block, changing transfer modes requires that the block be disabled; in doing
so the chipselect line is inherently deasserted and (usually) the attached
device discards its state. Consequentially, switching modes requires that a
platform-specific chipselect function has been defined so that the chipselect
is not dropped during the change.
Signed-off-by: NGeorge Shore <george@georgeshore.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The 'poll_transfer' function employs a conditional to test whether the
transmit buffer is valid; in doing so, on a receive operation no data is
clocked out, thus no data is clocked in and ultimately errors appear.

This removes the conditional as the transmit function will be set to a null
writer when the transmit buffer is invalid, allowing the driver to clock
0x00 out to the device to receive data from the device.
Signed-off-by: NGeorge Shore <george@georgeshore.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Signed-off-by: NGeorge Shore <george@georgeshore.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

As per the function signature.
Signed-off-by: NGeorge Shore <george@georgeshore.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

FIFO depth is configurable for each implementation of DW core,
so add a depth detection for those interface drivers who don't set
the fifo_len explicitly
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Acked-by: NJean-Hugues Deschenes <jean-hugues.deschenes@octasic.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Section mismatch in reference from the function dw_spi_add_host()
to the function init_queue()
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

xilinx_spi presently makes some fairly questionable assumptions about I/O
routines, and attempts to assign ioread32/iowrite32 and friends directly
to its own internal function pointers. On many platforms these I/O
routines are macros or wrappers and not actual functions on their own,
resulting in things like:

ERROR: "ioread32be" [drivers/spi/xilinx_spi.ko] undefined!
ERROR: "iowrite32be" [drivers/spi/xilinx_spi.ko] undefined!
ERROR: "iowrite32" [drivers/spi/xilinx_spi.ko] undefined!
ERROR: "ioread32" [drivers/spi/xilinx_spi.ko] undefined!

If xilinx_spi wants to do this sort of casting, it needs to provide its
own wrappers for these, or change how it does accesses completely.

I've opted for the first approach, and the attached silly patch does
that. If someone with the hardware available wants to give the second
option a try that's ok too. In any event, the current code is broken for
at least: arm, avr32, blackfin, microblaze, mn10300, and sh.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
Acked-by: NRichard Röjfors <richard.rojfors@pelagicore.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Useful when debugging multiple spi channels.
Signed-off-by: NAlberto Panizzo <maramaopercheseimorto@gmail.com>
Acked-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Update the MSIOF driver to remove the architecture
speficic spi header file and add err.h. This makes
the driver compile on non-SH architectures.
Signed-off-by: NMagnus Damm <damm@opensource.se>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Now dw_spi core fully supports 3 transfer modes: pure polling,
DMA and IRQ mode. IRQ mode will use the FIFO half empty as
the IRQ trigger, so each interface driver need set the fifo_len,
so that core driver can handle it properly
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Make the driver wait at least  for 1 jiffie before issuing the
warning, no matter what HZ is set to
Signed-off-by: NFeng Tang <feng.tang@intel.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Since most of the chip-selects are simply going to be like
gpio_set_value, it would do good to have the same callback type
so that it could simply be made to point at gpio_set_value.
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Header for platform specific stuff has been rename to include the SoC
type. Include the new header instead.
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Add precautionary check before releasing memory region.
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The pointer to SPI rate source clock had better be the member of
driver local data structure rather than platform specific.
Also, remove definitions of variable 'sci' that are rendered
useless as a consequence.
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The instance of SPI clock for controller and that used for generating
signals ought to be independently handled.
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Rename 'struct s3c64xx_spi_cntrlr_info' to lesser wordy
'struct s3c64xx_spi_info'
Signed-off-by: NJassi Brar <jassi.brar@samsung.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

platform_get_irq returns -ENXIO on failure, so !irq was probably
always true.  Make irq a signed variable and compare irq <= 0.  Note
that a return value of zero is still handled as error even though this
could mean irq0.

This is a followup to 305b3228 that
changed the return value of platform_get_irq from 0 to -ENXIO on error.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Acked-by: NAnton Vorontsov <avorontsov@ru.mvista.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Add support for the QSPI controller found some on Freescale/Motorola
Coldfire MCUs.

Full duplex, active high cs, spi modes 0-3 and word sizes 8-16 bits are
supported.  The hardware drives the MISO, MOSI and SCLK lines, but the chip
selects are managed via GPIO and must be configured by the board code.

The QSPI controller has an 80 byte buffer which allows us to transfer up to 16
words at a time.  For transfers longer than 16 words, we split the buffer in
half so we can update in one half while the controller is operating on the
other half.  Interrupt latencies then ultimately limits our sustained thru-put
to something less than half the maximum speed supported by the part.
Signed-off-by: NSteven King <sfking@fdwdc.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

The match_table field of the struct of_device_id is constant
in <linux/of_platform.h> so it is worth to make the initialization
data constant.

The semantic match that finds this kind of pattern is as follows:
(http://coccinelle.lip6.fr/)

// <smpl>
@r@
disable decl_init,const_decl_init;
identifier I1, I2, x;
@@
	struct I1 {
	  ...
	  const struct I2 *x;
	  ...
	};
@s@
identifier r.I1, y;
identifier r.x, E;
@@
	struct I1 y = {
	  .x = E,
	};
@c@
identifier r.I2;
identifier s.E;
@@
	const struct I2 E[] = ... ;
@depends on !c@
identifier r.I2;
identifier s.E;
@@
+	const
	struct I2 E[] = ...;
// </smpl>
Signed-off-by: NMárton Németh <nm127@freemail.hu>
Cc: Julia Lawall <julia@diku.dk>
Cc: cocci@diku.dk
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

Signed-off-by: NRobert P. J. Day <rpjday@crashcourse.ca>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

This patch adds support for a SPI master driver for the
DaVinci series of SOCs
Signed-off-by: NSandeep Paulraj <s-paulraj@ti.com>
Signed-off-by: NMark A. Greer <mgreer@mvista.com>
Signed-off-by: NPhilby John <pjohn@in.mvista.com>
Signed-off-by: NSudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>

/sys/bus/pci/drivers/megaraid_sas/poll_mode_io defaults to being
world-writable, which seems bad (letting any user affect kernel driver
behavior).

This turns off group and user write permissions, so that on typical
production systems only root can write to it.
Signed-off-by: NBryn M. Reeves <bmr@redhat.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

There are two copies of list_sort() in the tree already, one in the DRM
code, another in ubifs.  Now XFS needs this as well.  Create a generic
list_sort() function from the ubifs version and convert existing users
to it so we don't end up with yet another copy in the tree.
Signed-off-by: NDave Chinner <david@fromorbit.com>
Acked-by: NDave Airlie <airlied@redhat.com>
Acked-by: NArtem Bityutskiy <dedekind@infradead.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Interestingly, when SIDPR is used in ata_piix, writes to DET in
SControl sometimes get ignored leading to detection failure.  Update
sata_link_resume() such that it reads back SControl after clearing DET
and retry if it's not clear.
Signed-off-by: NTejun Heo <tj@kernel.org>
Reported-by: Nfengxiangjun <fengxiangjun@neusoft.com>
Reported-by: NJim Faulkner <jfaulkne@ccs.neu.edu>
Cc: stable@kernel.org
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Commit 871af121 enabled 32bit PIO for
PATA piix but didn't for SATA.  There's no reason not to use 32bit PIO
on SATA piix.  Enable it.
Signed-off-by: NTejun Heo <tj@kernel.org>
Cc: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

When sata_promise encounters an overrun or underrun error it
translates that to a libata AC_ERR_HSM, causing a hard reset.
Since over/under-runs were thought to be rare and transient,
this action seemed reasonable.

Unfortunately it turns out that the controller throws overrun
errors when e.g. hal polls a CD or DVD writer containing blank
media, causing long sequences of hard resets and retries before
EH finally gives up.

This patch updates sata_promise to classify over/under-runs as
AC_ERR_OTHER instead. This allows libata EH and upper layers to
retry or fail the operation as they see fit without the disruption
caused by repeated hard resets.

This fixes a problem using a DVD-RAM drive with sata_promise,
reported by Thomas Schorpp. I also tested it on a DVD-RW drive.
Signed-off-by: NMikael Pettersson <mikpe@it.uu.se>
Tested-by: Nthomas schorpp <thomas.schorpp@googlemail.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

During TX timeout procedure dev could be awoken too early, e.g. by
sky2_complete_tx() called from sky2_down(). Then sky2_xmit_frame()
can run while buffers are freed causing an oops. This patch fixes it
by adding netif_device_present() test in sky2_tx_complete().

Fixes: http://bugzilla.kernel.org/show_bug.cgi?id=14925

With debugging by: Mike McCormack <mikem@ring3k.org>
Reported-by: NBerck E. Nash <flyboy@gmail.com>
Tested-by: NBerck E. Nash <flyboy@gmail.com>
Signed-off-by: NJarek Poplawski <jarkao2@gmail.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

If the panel's probe had failed, omapfb would still go on, eventually
crashing.

A better fix would be to handle each display properly, and leaving just
the failed display out. But that is a bigger change.
Signed-off-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>

If the scaling ratio is below 0.5 video output width can't be identical
to the display width. Reject such settings.
Signed-off-by: NVille Syrjälä <ville.syrjala@nokia.com>
Acked-by: NTomi Valkeinen <tomi.valkeinen@nokia.com>

commit abd6633c ("pnp: add a shutdown
method to pnp drivers") adds shutdown method to bus driver blindly.  With
it, driver->shutdown is no longer valid.

Use pnp_driver->shutdown instead.

Addresses http://bugzilla.kernel.org/show_bug.cgi?id=14889Signed-off-by: NOGAWA Hirofumi <hirofumi@mail.parknet.co.jp>
Reported-by: NMalte Schröder <maltesch@gmx.de>
Cc: "Rafael J. Wysocki" <rjw@sisk.pl>
Cc: Bjorn Helgaas <bjorn.helgaas@hp.com>
Cc: David Hardeman <david@hardeman.nu>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Cc: Paul Gortmaker <p_gortmaker@yahoo.com>
Cc: <stable@kernel.org>		[2.6.32.x]
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: NMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: NMike Frysinger <vapier@gentoo.org>
Cc: Jean Delvare <khali@linux-fr.org>
Cc: David Brownell <david-b@pacbell.net>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

menu: use proper 64 bit math

The new menu governor is incorrectly doing a 64 bit divide.  Compile
tested only
Signed-off-by: NStephen Hemminger <shemminger@vyatta.com>
Cc: Arjan van de Ven <arjan@linux.intel.com>
Cc: Len Brown <len.brown@intel.com>
Cc: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Cc: <stable@kernel.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Signed-off-by: <tomaz.mertelj@guest.arnes.si>
Cc: Jean Delvare <khali@linux-fr.org>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>