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Patch from Andre McCurdy
Replaces generic swab32 routine with a more ARM friendly version.
Reduces kernel text size by approx 1200 bytes when compiled with
3.4.4 and approx 2400 bytes with 4.0.2
Probably some performance benefit as well.
Signed-off-by: Andre McCurdy <armccurdy@yahoo.co.uk>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Jared Hulbert
The following patch changes the bus arbiter controller settings
for the Intel PXA27x Application Processor Family. Up to 5%
better video performance. It parks the bus on the core while not
in use and sets the arbitration for other bus items. The patch
only applies changes to the Intel Mainstone development platform.
This patch is not compatible with preproduction Intel PXA27x
silicon.
This patch is based on the Intel Linux Preview Kit released to the
public on 25 Feb. 2005 found at
ftp://ftp.arm.linux.org.uk/pub/linux/arm/people/xscale/mainstone/02-25-2005/.
Signed-off-by: Justin A Treon <justin_treon@yahoo.com>
Signed-off-by: Jared Hulbert <jaredeh@gmail.com>
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Deepak Saxena
The expansion bus on the IXP46x NPU can be configured for either 32MiB or
16MiB windows and changing the configuration causes the base address for
each chip select for each region to change. Because of this, we cannot
hardcode the physical base as we currently do. This patch checks the
expansion bus configuration registers at runtime to determine the
appropriate window size. Note that this requires that the bootloader
already configured the device sizes appropriately, but I feel that is
valid assumption to make as the bootloader must configure and access
the flash window, the output display (LCD, LEDs, etc) window, and
other expansion bus devices.
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Richard Purdie
This patch moves a large chunk of the sharpsl_pm driver to
arch/arm/common so that it can be reused on other devices such as the
SL-5500 (collie). It also abstracts some functions from the core into
the machine and platform specific parts of the driver to aid reuse.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Lennert Buytenhek
Add symbolic names for the five ixp2400 GPIO lines on the enp2611
that are used as interrupts.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Lennert Buytenhek
In its interrupt handler, the (NAPI) ixp2000 netdev driver needs to use
the masked thread interrupt status register (instead of the raw one) to
prevent scheduling polling when polling is already running when a TXdone
interrupt comes in. The definitions for the masked status registers were
not in yet, so this patch adds them.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Lennert Buytenhek
Remove the ixdp2x01 cs89x0 hack from ixp2000's io implementation.
Since the cs89x0 driver has been made properly aware of the odd way
the cs89x0 is hooked up on the ixdp2x01, we don't need this hack
anymore.
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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moved out of line)
Patch from Rod Whitby
PAGE_SHIFT is undeclared in include/asm-arm/arch-ixp4xx/memory.h, identified by the following kernel compilation error:
CC [M] sound/core/memory.o
In file included from include/asm/memory.h:27,
from include/asm/io.h:28,
from sound/core/memory.c:24:
include/asm/arch/memory.h: In function `__arch_adjust_zones':
include/asm/arch/memory.h:28: error: `PAGE_SHIFT' undeclared (first use
in this function)
This patch replaces my previous attempt at fixing this problem (Patch 3214/1) and is based on the following feedback:
Russell King wrote:
> The error you see came up on SA1100. The best solution was to move
> the __arch_adjust_zones() function out of line. I suggest ixp4xx
> does the same.
I have moved the function out of line into arch/arm/mach-ixp4xx/common-pci.c as suggested.
Signed-off-by: Rod Whitby <rod@whitby.id.au>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Rod Whitby
This patch adds support for a new arm/ixp4xx machine - the Iomega NAS 100d network attached storage product. The NAS100D is a consumer device containing a 266MHz Intel IXP420 processor, 16MB of flash, 64MB of RAM, a 160Gb internal IDE hard disk, and 802.11b/g wireless on an Atheros mini-PCI card.
Work on porting the latest 2.6.x kernel to this device is being done by
the NSLU2-Linux project (the same team who maintains the port to the
Linksys NSLU2 device). In particular, the majority of this patch was
authored by Alessandro Zummo, based on the work done for MACH_NSLU2
support by the NSLU2-Linux core team of developers.
MACH_NAS100D (as implemented by this patch) can be enabled in jumbo
ixp4xx kernels without any affect on the other machines supported by
that kernel.
This patch applies cleanly against 2.6.15-rc7 and should be trivial to
apply to later kernel versions. It does not depend upon any other
patches.
Modified files (and number of lines inserted):
arch/arm/mach-ixp4xx/Kconfig | 8
arch/arm/mach-ixp4xx/Makefile | 1
include/asm-arm/arch-ixp4xx/hardware.h | 1
include/asm-arm/arch-ixp4xx/irqs.h | 9
include/asm-arm/arch-ixp4xx/nas100d.h | 75
arch/arm/mach-ixp4xx/nas100d-pci.c | 77
arch/arm/mach-ixp4xx/nas100d-power.c | 69
arch/arm/mach-ixp4xx/nas100d-setup.c | 133
-- Rod Whitby (NSLU2-Linux project lead)
Signed-off-by: Rod Whitby <rod@whitby.id.au>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Deepak Saxena
Other than interrupt masking purposes, this API is only used when
configuring interrupt lines and this patch moves that functionality
directly into the ixp4xx_set_irq_type() implementation as board level
PCI code should not need to worry about those details.
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Since we now only build arch/arm/kernel/dma.c on machine types
which set ISA_DMA_API, we don't need to define MAX_DMA_CHANNELS
to 0 to indicate this - this definition becomes superfluous.
Remove it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The old __address element in struct scatterlist remained from older
kernels because the ARM DMA emulation code made use of it. Move
this field into struct dma_struct, and convert DMA emulation code
to setup a SG entry as required.
Also, convert DMA emulation code to use the new DMA API rather
than the PCI DMA API.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Allow the compiler to optimise the bus_to_virt(virt_to_bus())
transformation in the ARM ISA DMA interface.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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It seems that clk_use() and clk_unuse() are additional complexity
which isn't required anymore. Remove them from the clock framework
to avoid the additional confusion which they cause, and update all
ARM machine types except for OMAP.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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It seems that there's some confusion over how the clock source
framework should be used. Add some additional comments to explain
the ambiguous areas.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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arch/arm/kernel/entry-armv.S has contained a comment suggesting
that asm/hardware.h and asm/arch/irqs.h should be moved into the
asm/arch/entry-macro.S include. So move the includes to these
two files as required.
Add missing includes (asm/hardware.h, asm/io.h) to asm/arch/system.h
includes which use those facilities, and remove asm/io.h from
kernel/process.c.
Remove other unnecessary includes from arch/arm/kernel, arch/arm/mm
and arch/arm/mach-footbridge.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Daniel Jacobowitz
Handle new EABI relocations when loading kernel modules. This is
necessary for CONFIG_AEABI kernels, and also for some broken
(since fixed) old ABI toolchains.
Signed-off-by: Daniel Jacobowitz <dan@codesourcery.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Deepak Saxena
This looks like a leftover from 2.4 days...
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Hiroki Kaminaga
This patch defines a new macro: pfn_to_kaddr(pfn).
Same macro is already defined on other arch, such as i386.
Signed-off-by: Hiroki Kaminaga <kaminaga@sm.sony.co.jp>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Deepak Saxena
Mark the ioremap'd cookie/pointer in said functions as const since
we should not be actualy touching the data. This fixes a slew of
compile warnings on IXP4xx as our reads[bwl] already mark this
parameter as const.
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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sema_count() defined only for ARM but not used anywhere.
Signed-off-by: Arthur Othieno <a.othieno@bluewin.ch>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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ARMv6K CPUs have SEV (send event) and WFE (wait for event) instructions
which allow the CPU clock to be suspended until another CPU issues a
SEV, rather than spinning on the lock wasting power. Make use of these
instructions.
Note that WFE does not wait if an event has been sent since the last WFE
cleared the event status, so although it may look racy, the instruction
implementation ensures that these are dealt with.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Lucas Correia Villa Real
This patch adds definitions to GPIO registers for the S3C2400 into
include/asm-arm/arch-s3c2410/regs-gpio.h.
Signed-off-by: Lucas Correia Villa Real <lucasvr@gobolinux.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Unfortunately, we have a symbol clash between the SA-1100 header and
some drivers. Since everywhere which needs SA1100 specifics includes
asm/hardware.h, we don't need to include it in the SA1100 io.h header.
In file included from drivers/net/wireless/wavelan_cs.p.h:459,
from drivers/net/wireless/wavelan_cs.c:60:
drivers/net/wireless/wavelan_cs.h:97:1: warning: "LCSR" redefined
In file included from include/asm/arch/hardware.h:56,
from include/asm/hardware.h:16,
from include/asm/arch/io.h:13,
from include/asm/io.h:71,
from drivers/net/wireless/wavelan_cs.p.h:433,
from drivers/net/wireless/wavelan_cs.c:60:
include/asm/arch/SA-1100.h:1907:1: warning: this is the location of the previous definition
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Adam Brooks
Fixes an issue in 2.6.15-rc2 that prevented compilation of kernels for IOP3xx boards.
Signed-off-by: Adam Brooks <adam.j.brooks@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Since the defintion of NODES_SHIFT may be overridden in asm/arch/memory.h
it's important to include asm/memory.h into asm/numnodes.h to ensure
that the correct value is always defined.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Kenneth Tan
To add queue manager region size which is missing from ixp4xx-regs.h
Signed-off-by: Kenneth Tan <chong.yin.tan@intel.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The receiver status register reports latched error conditions, which
must be cleared by writing to it. However, the data register reports
unlatched conditions which are associated with the current character.
Use the data register to interpret error status rather than the RSR.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Unfortunately, later gcc versions error out when our get_user is passed
a const pointer, since we write to a temporary variable declared as
typeof(*(p)) which propagates the const-ness.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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The "align" argument in ARMs __ioremap is unused and provides a
misleading expectation that it might do something. It doesn't.
Remove it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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In the old days when arm26/arm32 was combined into the same
architecture, proc-fns.h provided the xchg implementation for
arm26 CPUs. Since we no longer combine these two, this include
is no longer required. Remove it.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Since atomic.h does not include types.h, u32 may not be defined.
Since atomics are supposed to work on unsigned long quantities,
use unsigned long instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Unfortunately, using PAGE_SHIFT in asm/arch/memory.h is unsafe, and we
can't include asm/page.h into this file because then we have a circular
dependency. Move the offending code to arch/arm/common/sa1111.c
instead.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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atomic.h, bitops.h and mmu_context.h are using likely/unlikely.
thread_info.h uses __attribute_const__. Hence these files require
linux/compiler.h to be included.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Nicolas Pitre
If 'old' and 'oldval' are different then 'res' never gets set. In that
case, if ever %0 happened to contain anything but zero (rather likely)
then the code will loop forever (or until another CPU just come along
and change the atomic value to match 'old' which is rather unlikely).
Signed-off-by: Nicolas Pitre <nico@cam.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Rationalise hardware.h include.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Move __io_address to arch-realview/hardware.h, drop core.h from platsmp.c
and localtimer.c, and include asm/io.h where required.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Introduce an atomic_inc_not_zero operation. Make this a special case of
atomic_add_unless because lockless pagecache actually wants
atomic_inc_not_negativeone due to its offset refcount.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Introduce an atomic_cmpxchg operation.
Signed-off-by: Nick Piggin <npiggin@suse.de>
Cc: "Paul E. McKenney" <paulmck@us.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
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Patch from Richard Purdie
Add the core machine support for the Sharp SL-C1000 (Akita)
and enable the Kconfig selection for it.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Liam Girdwood
This patch allows users of the pxa SSP driver to register their own irq
handlers instead of using the default SSP handler. It also cleans up the
CKEN clock and irq detection as the values are now stored in a table.
This patch replaces 2845/1
Changes:-
o Added flags parameter to ssp_init()
o Added SSP_NO_IRQ flag to disable registering of ssp irq handler (for
drivers that want to register their own handler)
o Cleaned up clock and irq detection, values are now stored in table.
o Added build changes to allow other drivers (e.g audio) to select the
ssp driver.
o corgi_ssp.c changed to use new interface.
Signed-off-by: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Richard Purdie
This patch adds a power and battery management core driver which with
the addition of the right device files, supports the c7x0 and cxx00
series of Sharp Zaurus handhelds.
The driver is complex for several reasons. Battery charging is manually
monitored and controlled. When suspended, the device needs to
periodically partially resume, check the charging status and then
re-suspend. It does without bothering the higher linux layers as
a full resume and re-suspend is unnecessary. The code is carefully
written to avoid interrupts or calling code outside the module under
these circumstances. It also vets the various wake up sources and
monitors the device's power situation.
Hooks to limit the backlight intensity and to notify the battery
monitoring code of backlight events are connected/added as the
backlight is one of the biggest users of power on the device.
Signed-off-by: Richard Purdie <rpurdie@rpsys.net>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Tony Lindgren
This patch updates omap H2 defconfig.
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Tony Lindgren
This patch syncs the mainline kernel with linux-omap tree.
This patch contains changes to common header files for
omap1xxx and omap24xx by various omap developers, and
improved cpu detection by Imre Deak
Signed-off-by: Tony Lindgren <tony@atomide.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Alessandro Zummo
This patch adds support for the LinkSys NSLU2 running with
both big and little-endian kernels. The LinkSys NSLU2 is
a cost engineered ARM, XScale 420 based system similar to
the the Intel IXDP425 evaluation board. It uses the
IXP4XX ARCH.
While this patch applies independently of other patches
the resultant kernel requires further patches to successfully
use onboard devices, including the onboard flash. Since these
patches are independent of this one they will be submitted
separately.
A defconfig is not included here because not all of
the required drivers are actually in the kernel.
We intend to provide one as soon as the patches
will be incorporated in mainstream.
This patch is the combined work of nslu2-linux.org
Signed-off-by: John Bowler <jbowler@acm.org>
Signed-off-by: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Deepak Saxena <dsaxena@plexity.net>
Signed-off-by: Lennert Buytenhek <buytenh@wantstofly.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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Patch from Kyungmin Park
This patch is required for OneNAND MTD to passing the OneNAND sync. burst read
Signed-off-by: Kyungmin Park
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
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