This will fix warnings like following when CONFIG_PM_SLEEP is not set:

        warning: 'xxx_suspend' defined but not used [-Wunused-function]
        warning: 'xxx_resume' defined but not used [-Wunused-function]

Because
	SET_SYSTEM_SLEEP_PM_OPS(suspend_fn, resume_fn)

Only references the callbacks on CONFIG_PM_SLEEP (instead of CONFIG_PM).

Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: linux-ide@vger.kernel.org
Signed-off-by: NYuanhan Liu <yuanhan.liu@linux.intel.com>
Signed-off-by: NFengguang Wu <fengguang.wu@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

If kdump is triggered with pending IO, controller may not respond causing
kdump to fail.

http://marc.info/?l=linux-ide&m=133032255424658&w=2

During error recovery ata_do_dev_read_id never completes due hang
in mmio_insw.

ata_do_dev_read_id
 ata_sff_data_xfer
  ioread16_rep
   mmio_insw

if DMA start bit is cleared before reset, PIO command is successful
and kdump succeeds.
Signed-off-by: NDavid Milburn <dmilburn@redhat.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

ata_timing_find_mode could return NULL which is not checked by all
low-level ATA drivers using it and cause a NULL ptr deref. Warn at least
so that possible issues can get fixed easily.
Signed-off-by: NBorislav Petkov <bp@alien8.de>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

The ahci_highbank_probe function is incorrectly marked as __init,
which means it can get discarded at boot time, which might be
a problem if for some reason the device only becomes operational
after loading another module.

Using __devinit instead avoids seeing this warning for every build:

WARNING: vmlinux.o(.data+0xf7b0): Section mismatch in reference from the
variable ahci_highbank_driver to the function .init.text:ahci_highbank_probe()
The variable ahci_highbank_driver references
the function __init ahci_highbank_probe()
If the reference is valid then annotate the
variable with __init* or __refdata (see linux/init.h) or name the variable:
*_template, *_timer, *_sht, *_ops, *_probe, *_probe_one, *_console
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Cc: Mark Langsdorf <mark.langsdorf@calxeda.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

PATA arasan driver expects the clock to be set to 166 MHz for proper
functioning.  This patch sets clk to 166 MHz in probe.
Signed-off-by: NVipul Kumar Samar <vipulkumar.samar@st.com>
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

commit 6b66d958 didn't handle SATA PMP
case in ata_acpi_bind_device and will cause a NULL ptr dereference when
user attached a SATA drive to the PMP port. Fix this by checking PMP
support.

This bug is reported by Dan van der Ster in the following bugzilla page:
https://bugzilla.kernel.org/show_bug.cgi?id=48211Reported-by: NDan van der Ster <dan@vanderster.com>
Tested-by: NDan van der Ster <dan@vanderster.com>
Signed-off-by: NAaron Lu <aaron.lu@intel.com>
Cc: <stable@vger.kernel.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>
Tested-by: NSimon <tangouniform@sbcglobal.net>

Dove can be configured without PCI. We then get a number of warnings:

warning: 'msi' defined but not used
warning: 'mv5_sht' defined but not used
warning: 'mv_dump_pci_cfg' defined but not used.

Move around variables and add #ifdef as necassary to fix the warnings.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Allow sata_highbank to build even if no other users of libahci.o are built.
Signed-off-by: NMark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the samsung include directories
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Kyungmin Park <kyungmin.park@samsung.com>
Cc: Ben Dooks <ben-linux@fluff.org>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Guenter Roeck <linux@roeck-us.net>
Cc: "Wolfram Sang (embedded platforms)" <w.sang@pengutronix.de>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Bryan Wu <bryan.wu@canonical.com>
Cc: Richard Purdie <rpurdie@rpsys.net>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Felipe Balbi <balbi@ti.com>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Sangbeom Kim <sbkim73@samsung.com>
Cc: Liam Girdwood <lrg@ti.com>
Cc: linux-samsung-soc@vger.kernel.org

Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the pxa include directories
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NMauro Carvalho Chehab <mchehab@redhat.com>
Acked-by: NIgor Grinberg <grinberg@compulab.co.il>
Acked-by: NJeff Garzik <jgarzik@redhat.com>
Acked-by: NMarek Vasut <marex@denx.de>
Acked-by: NRobert Jarzmik <robert.jarzmik@free.fr>
Acked-by: NPaul Parsons <lost.distance@yahoo.com>
Acked-by: NVinod Koul <vinod.koul@linux.intel.com>
Acked-By: NStefan Schmidt <stefan@openezx.org>
Cc: Eric Miao <eric.y.miao@gmail.com>
Cc: Haojian Zhuang <haojian.zhuang@gmail.com>
Cc: Daniel Ribeiro <drwyrm@gmail.com>
Cc: Harald Welte <laforge@openezx.org>
Cc: Philipp Zabel <philipp.zabel@gmail.com>
Cc: Tomas Cech <sleep_walker@suse.cz>
Cc: Sergey Lapin <slapin@ossfans.org>
Cc: Jonathan Cameron <jic23@cam.ac.uk>
Cc: Dan Williams <djbw@fb.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Chris Ball <cjb@laptop.org>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Samuel Ortiz <samuel@sortiz.org>
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Cc: openezx-devel@lists.openezx.org

Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.

This moves such data out of the ep93xx include directories
Signed-off-by: NArnd Bergmann <arnd@arndb.de>
Acked-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Acked-by: NNicolas Pitre <nico@linaro.org>
Acked-by: NHartley Sweeten <hsweeten@visionengravers.com>
Acked-by: NRyan Mallon <rmallon@gmail.com>
Acked-by: NVinod Koul <vinod.koul@linux.intel.com>
Cc: Grant Likely <grant.likely@secretlab.ca>
Cc: Jeff Garzik <jgarzik@pobox.com>
Cc: Dan Williams <djbw@fb.com>
Cc: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Cc: Florian Tobias Schandinat <FlorianSchandinat@gmx.de>
Cc: Liam Girdwood <lrg@ti.com>
Cc: Jaroslav Kysela <perex@perex.cz>
Cc: Takashi Iwai <tiwai@suse.de>
Cc: Mika Westerberg <mika.westerberg@iki.fi>
Cc: Axel Lin <axel.lin@gmail.com>

Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Since READ/WRITE FPDMA QUEUED commands are 48-bit, bit 6 of the device register
means LBA, the same as for READ/WRITE DMA EXT commands. So use ATA_LBA instead
of the bare number in ata_build_rw_tf()'s branch dedicated to the NCQ commands.
Signed-off-by: NSergei Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

On many architectures, drivers are supposed to prepare/unprepare &
enable/disable functional clock of device. This patch adds clock support for
ahci_platform.
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

SPEAr platforms now support DT and so must convert all drivers to support DT.
This patch adds DT probing support for Arasan Compact Flash controller and
updates its documentation too.
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

clk_{un}prepare is mandatory for platforms using common clock framework. Since
this driver is used by SPEAr platform, which supports common clock framework,
add clk_{un}prepare() support for it.
Signed-off-by: NViresh Kumar <viresh.kumar@linaro.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Calxeda highbank SATA phy has intermittent problems bringing up a link
with Gen3 drives. Retrying the phy hard reset can work-around this issue,
but each reset also disables spread spectrum support. The reset function
also needs to reprogram the phy to enable spread spectrum support.

Create a new driver based on ahci_platform to support the Calxeda Highbank
SATA controller.
Signed-off-by: NMark Langsdorf <mark.langsdorf@calxeda.com>
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

The freescale V2 SATA controller checks if the received data length matches
the programmed length 'ttl', if not, it assumes that this is an error.
In ATAPI, the 'ttl' is based on max allocation length and not the actual
data transfer length, controller will raise 'DLM' (Data length Mismatch)
error bit in Hstatus register. Along with 'DLM', DE (Device error) and
FE (fatal Error) bits are also set in Hstatus register, 'E' (Internal Error)
bit is set in Serror register and CE (Command Error) and DE (Device error)
registers have the corresponding bit set. In this condition, we need to
clear errors in following way: in the service routine, based on 'DLM' flag,
HCONTROL[27] operation clears Hstatus, CE and DE registers, clear Serror
register.
Signed-off-by: NShaohui Xie <Shaohui.Xie@freescale.com>
Signed-off-by: NAnju Bhartiya <Anju.Bhartiya@freescale.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Device Sleep is a feature as described in AHCI 1.3.1 Technical Proposal.
This feature enables an HBA and SATA storage device to enter the DevSleep
interface state, enabling lower power SATA-based systems.

Aggressive Device Sleep enables the HBA to assert the DEVSLP signal as
soon as there are no commands outstanding to the device and the port
specific Device Sleep idle timer has expired. This enables autonomous
entry into the DevSleep interface state without waiting for software
in power sensitive systems.

This patch enables Aggressive Device Sleep only if both host controller
and device support it.

Tested on AMD reference board together with Device Sleep supported device
sample.
Signed-off-by: NShane Huang <shane.huang@amd.com>
Reviewed-by: NAaron Lu <aaron.lwe@gmail.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

They don't always appear as AHCI class devices but instead as IDE class.

Based on an initial patch by Hiroaki Nito

Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=42804Signed-off-by: NAlan Cox <alan@linux.intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

This can also appear as 0x9192. Reported in bugzilla and confirmed with the
board documentation for these boards.

Resolves-bug: https://bugzilla.kernel.org/show_bug.cgi?id=42970Signed-off-by: NAlan Cox <alan@linux.intel.com>
Cc: The Stables <stable@vger.kernel.org>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

The JMicron JMB362 controller supports AHCI only, but some revisions
use the IDE class code.  These need to be matched by device ID.

These additions have apparently been included by QNAP in their NAS
devices using these controllers.

References: http://bugs.debian.org/634180Signed-off-by: NBen Hutchings <ben@decadent.org.uk>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

It caused several reported regressions.

This reverts commit 91895b78.

commit d70e551c, Add " 2GB ATA Flash
Disk"/"ADMA428M" to DMA blacklist, should have added a space before 2GB.
Signed-off-by: NPrarit Bhargava <prarit@redhat.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

libsas and ipr pass flags to ata_host_init that are meant for the port.

ata_host flags:
	ATA_HOST_SIMPLEX	= (1 << 0),	/* Host is simplex, one DMA channel per host only */
	ATA_HOST_STARTED	= (1 << 1),	/* Host started */
	ATA_HOST_PARALLEL_SCAN	= (1 << 2),	/* Ports on this host can be scanned in parallel */
	ATA_HOST_IGNORE_ATA	= (1 << 3),	/* Ignore ATA devices on this host. */

flags passed by libsas:
	ATA_FLAG_SATA		= (1 << 1),
	ATA_FLAG_PIO_DMA	= (1 << 7), /* PIO cmds via DMA */
	ATA_FLAG_NCQ		= (1 << 10), /* host supports NCQ */

The only one that aliases is ATA_HOST_STARTED which is a 'don't care' in
the libsas and ipr cases since ata_hosts from these sources are not
registered with libata.
Reported-by: NHannes Reinecke <hare@suse.com>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Acked-by: NBrian King <brking@us.ibm.com>
Acked-by: NJeff Garzik <jgarzik@redhat.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Reuse ata_port_{suspend|resume}_common for sas.  This path is chosen
over adding coordination between ata-tranport and sas-transport because
libsas wants to revalidate the domain at resume-time at the host level.
It can not validate links have resumed properly until libata has had a
chance to perform its revalidation, and any sane placing of an ata_port
in the sas-transport model would delay it's resumption until after the
host.

Export the common portion of port suspend/resume (bypass pm_runtime),
and allow sas to perform these operations asynchronously (similar to the
libsas async-ata probe implmentation).  Async operation is determined by
having an external, rather than stack based, location for storing the
result of the operation.
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Reviewed-by: NJacek Danecki <jacek.danecki@intel.com>
Acked-by: NJeff Garzik <jgarzik@redhat.com>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

Hotplug testing with libsas currently encounters a 55 second wait for
link recovery to give up.  In the case where the user trusts the
response time of their devices permit the recovery attempts to be
limited to one.
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
Acked-by: NJeff Garzik <jgarzik@redhat.com>
Acked-by: NTejun Heo <tj@kernel.org>
Signed-off-by: NJames Bottomley <JBottomley@Parallels.com>

The cache_type file in sysfs lets users configure the disk cache in
write-through or write-back modes.  However, ata disks do not support
writing to the file because they do not implement the MODE SELECT
command.

This patch adds a translation from MODE SELECT (for the caching page
only) to the ATA SET FEATURES command.  The set of changeable parameters
answered by MODE SENSE is also adjusted accordingly.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Since the next patch will introduce support for MODE SELECT, it
makes sense to start advertising which bits are actually changeable.
For now, the answer is none.

Default parameters can also be reported, they are simply the same
as the current parameters.
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Some other unlikely() should probably be removed as well.  A fresh look
reveals an over-enthusiasm for unlikely() in libata-scsi.c.
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Currently, SATA disk fua detection is disabled on default because most of
devices don't support this feature at that time.  With the development of
technology, more and more SATA disks support this feature.  So now we can enable
this detection on default.

Although fua detection is defined as a kernel module parameter, it is too hard
to set its value because it must be loaded and set before system starts up.
That needs to modify initrd file.  So it is inconvenient for administrator who
needs to manage a huge number of servers.
Signed-off-by: NZheng Liu <wenqing.lz@taobao.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Michael Eitelwein writes:

I have an external SATA drive that was slowed down by bridge limits. I
found a solution in a thread on this list posted in 2008: It introduces
whitelist entries in libata-core.c for devices with well working bridges
(e.g. email on Fri, 31 Oct 2008 01:45:27 -0400).

I added my device to this whitelist in a custom built kernel and it
works fine for weeks now. How can I have this device added on the
whitelist within the official kernel? Is this whitelist mechanism still
supported or is there a smarter way to achieve whitelisting?

I added the following whitelist entry for my Buffalo DriveStation
Quattro "BUFFALO HD-QSU2/R5":

        /* Devices that do not need bridging limits applied */
        { "MTRON MSP-SATA*",            NULL,   ATA_HORKAGE_BRIDGE_OK, },
        { "BUFFALO HD-QSU2/R5",         NULL,   ATA_HORKAGE_BRIDGE_OK, },
Reported-by: NMichael Eitelwein <michael@eitelwein.net>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Building Linux for an ASUS Eee PC 701 4G with

        ata2.00: CFA: SILICONMOTION SM223AC, , max UDMA/66
        ata2.00: 7815024 sectors, multi 0: LBA
        ata2.00: configured for UDMA/66
        scsi 1:0:0:0: Direct-Access     ATA      SILICONMOTION SM n/a  PQ: 0 ANSI: 5
        sd 1:0:0:0: [sda] 7815024 512-byte logical blocks: (4.00 GB/3.72 GiB)
        sd 1:0:0:0: [sda] Write Protect is off
        sd 1:0:0:0: [sda] Mode Sense: 00 3a 00 00
        sd 1:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA
         sda: sda1
        sd 1:0:0:0: [sda] Attached SCSI disk
        sd 1:0:0:0: Attached scsi generic sg0 type 0

I followed the advice to not use the deprecated old PATA subsystem

        ATA/ATAPI/MFM/RLL support (DEPRECATED)  --->

and use the ATA subsystem instead.

        Serial ATA and Parallel ATA drivers  --->

Unfortunately I needed several tries to find out, that I needed the SFF
menu I had not selected before because I had never heard that term
before. I think it would have helped me, to have PATA or legacy IDE in
that item’s name.
Signed-off-by: NPaul Menzel <paulepanter@users.sourceforge.net>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Commit 30dcf76a mistakenly dropped
the code to get an initial gtm for the IDE channel. This caused the
following problem for Sergei:
http://marc.info/?l=linux-kernel&m=134484963618457&w=2

Fix this by adding the call back in ata_acpi_bind_host, and due to
this, the ata_ap_acpi_handle is modified accordingly.
Tested-by: NSergei Trofimovich <slyich@gmail.com>
Signed-off-by: NAaron Lu <aaron.lu@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

This patch adds the IDE-mode SATA Device IDs for the Intel Lynx Point-LP PCH
Signed-off-by: NJames Ralston <james.d.ralston@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

This patch adds the AHCI-mode SATA Device IDs for the Intel Lynx Point-LP PCH
Signed-off-by: NJames Ralston <james.d.ralston@intel.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

The mainboard MSI E350DM-E33 is advertised with 6 SATA ports.
As it turns out, two of them seem to be driven by on-board
SATA<->PATA converters. If a disk drive is connected to one
of them kernel uses UDMA/33 mode due to cable detection:

[   34.550823] scsi4 : pata_atiixp
[   34.555517] scsi5 : pata_atiixp
[   34.555942] ata5: PATA max UDMA/100 cmd 0x1f0 ctl 0x3f6 bmdma 0xf100 irq 14
[   34.555948] ata6: PATA max UDMA/100 cmd 0x170 ctl 0x376 bmdma 0xf108 irq 15
...
[   35.040799] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
[   35.040806] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[   35.040817] ata5.00: limited to UDMA/33 due to 40-wire cable
[   35.049166] ata5.00: configured for UDMA/33
[   35.049402] scsi 4:0:0:0: Direct-Access     ATA      WDC WD20EADS-00R 01.0 PQ: 0 ANSI: 5

This patch forces "short cable" mode on this board, as it seems clear that
the on-board SATA<->PATA "cable" is short.
With this patch the disk is configured for UDMA/100:

[    5.976756] ata5.00: ATA-8: WDC WD20EADS-00R6B0, 01.00A01, max UDMA/133
[    5.996434] ata5.00: 3907029168 sectors, multi 16: LBA48 NCQ (depth 0/32)
[    6.024787] ata5.00: configured for UDMA/100

Testing revealed no transfer issues.
Signed-off-by: NArnd Hannemann <arnd@arndnet.de>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

Make ahci_dev_classify available to the ahci platform driver for custom
hard reset function.
Signed-off-by: NRob Herring <rob.herring@calxeda.com>
Signed-off-by: NJeff Garzik <jgarzik@redhat.com>

With addition of dummy clk_*() calls for non CONFIG_HAVE_CLK cases in
clk.h, there is no need to have clk code enclosed in #ifdef
CONFIG_HAVE_CLK, #endif macros.
Signed-off-by: NViresh Kumar <viresh.kumar@st.com>
Cc: Jeff Garzik <jgarzik@redhat.com>
Cc: Russell King <rmk@arm.linux.org.uk>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Cc: viresh kumar <viresh.linux@gmail.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add support for instantiating this driver from device tree, and add
the necassary DT information to the kirkwood.dtsi file.

This is based on previous work by Michael Walle and Jason Cooper.
Signed-off-by: NAndrew Lunn <andrew@lunn.ch>
Tested-by: NJosh Coombs <josh.coombs@gmail.com>