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  1. 13 2月, 2010 2 次提交
  3. 14 12月, 2009 1 次提交
    • R
      ARM: fix sa1100 build · 1937f5b9
      由 Russell King 提交于 
      Fix:

arch/arm/mach-sa1100/generic.c:117: error: redefinition of 'cpufreq_get'
include/linux/cpufreq.h:299: error: previous definition of 'cpufreq_get' was here

cpufreq_get() is used on these platforms to tell drivers what the CPU
frequency is, and therefore the bus frequency - which is critical for
setting the PCMCIA and LCD timings.  Adding ifdefs to these drivers to
select cpufreq_get() or some other interface adds confusion.  Making
these drivers use some other interface for the normal paths and cpufreq
stuff for the cpufreq notifier is insane as well.

(Why x86 can't provide a version of cpufreq_get() which returns the
CPU frequency when CPUFREQ is disabled is beyond me, rather than
requiring a dummy zero-returning cpufreq_get().  Especially as they
do:

			unsigned long khz = cpufreq_get(cpu);
			if (!khz)
				khz = tsc_khz;

In other words, if CPUFREQ is disabled, get it from tsc_khz - why
not provide a dummy cpufreq_get() which returns tsc_khz?)
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      1937f5b9
  5. 01 12月, 2009 1 次提交
    • B
      ARM: SAMSUNG: Add plat-samsung as starting point for plat-s3c* moves · cf383678
      由 Ben Dooks 提交于 
      We inted to re-organise the plat-s3c/plat-s3c24xx/plat-s3c64xx into a
more generic plat-samsung with less code in the other plat- directories
to make it easier to port new devices and try and clear up some of the
naming issues with newer devices.

Start by creating a small arch/arm/plat-samsung with no actuall code in
so we can move items in as we process them.

Add this to arch/arm to allow it to build things once support is added.
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
      cf383678
  7. 28 11月, 2009 3 次提交
  9. 30 10月, 2009 2 次提交
    • M
      iop: enable generic time · 980f2296
      由 Mikael Pettersson 提交于 
      This updates the IOP platform to use the kernel's generic time
framework. With clockevent support in place, this reduces to
selecting GENERIC_TIME and removing the platform's private timer
->offset() operation (iop_gettimeoffset).

Tested on n2100, compile-tested for all plat-iop machines.
Signed-off-by: NMikael Pettersson <mikpe@it.uu.se>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
      980f2296
    • M
      iop: clockevent support · 469d3044
      由 Mikael Pettersson 提交于 
      This updates the IOP platform to expose the interrupting
timer 0 as a clockevent object. The timer interrupt handler
is changed to call the clockevent ->event_handler() instead
of timer_tick(), and ->set_next_event() and ->set_mode()
operations are added to allow the mode of the timer to be
updated (required for ONESHOT/NOHZ mode).

Timer 0 must now be properly initialised, which requires
a new write_tcr0() function from the mach-specific code.

The mode of timer 0 must be read at the start of ->set_mode(),
which requires a new read_tmr0() function from the mach-
specific code.

Initial setup of timer 0 is also rewritten to be more robust.

Tested on n2100, compile-tested for all plat-iop machines.
Signed-off-by: NMikael Pettersson <mikpe@it.uu.se>
Signed-off-by: NDan Williams <dan.j.williams@intel.com>
      469d3044
  11. 16 9月, 2009 1 次提交
  13. 18 8月, 2009 1 次提交
  15. 17 8月, 2009 1 次提交
    • B
      ARM: S5PC100: Kconfigs and Makefiles · 5a7652f2
      由 Byungho Min 提交于 
      S5PC100 is a new SoC with ARM coretex-A8 and numerous peripherals. This SoC is
successor of S3C64XX. S5PC100 has peripherals which are still similar to S3C
families so some drivers in "arch/arm/plat-s3c" can be shared. S5PC100 specific
drivers will be added in "arch/arm/plat-s5pcxx" or "arch/arm/mach-s5pc100"
Signed-off-by: NByungho Min <bhmin@samsung.com>
[ben-linux@fluff.org: tidy and edit description]
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
      5a7652f2
  17. 15 8月, 2009 3 次提交
  19. 14 8月, 2009 2 次提交
    • U
      [ARM] let arch/arm/Kconfig source drivers/Kconfig · ac25150f
      由 Uwe Kleine-König 提交于 
      The changes introduced by this change are:
  - drivers/mtd/Kconfig doesn't depend on ALIGNMENT_TRAP ||
    !CPU_CP15_MMU any more
  - the following files are sourced additionally:
    + drivers/macintosh/Kconfig
      completely depends on PPC || MAC || X86
    + drivers/telephony/Kconfig
      new
    + drivers/pps/Kconfig
      new
    + drivers/infiniband/Kconfig
      new
    + drivers/edac/Kconfig
      depends on X86 || PPC
    + drivers/vlynq/Kconfig
      depends on AR7 && EXPERIMENTAL (that is ARCH_MIPS)
    + drivers/xen/Kconfig
      everything depends on XEN
    + drivers/platform/Kconfig
      depends on X86
  - drivers/regulator/Kconfig is sourced later as is
    drivers/accessibility/Kconfig
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
      ac25150f
    • U
      Use kernel/Kconfig.preempt for ARM · d45a398f
      由 Uwe Kleine-König 提交于 
      before this patch ARM had it's own definition of CONFIG_PREEMPT.
Instead of that use the general definition provided in
kernel/Kconfig.preempt.

This patch changes the available options in *config.  Namely PREEMPT
isn't a stand alone bool anymore, but part of a 'choice' the
following Kconfig symbols are added:

	PREEMPT_NONE
	PREEMPT_VOLUNTARY

Selecting PREEMPT_NONE now produces exactly the code as not selecting
PREEMPT before (apart from a comment in
/sys/kernel/debug/tracing/(per_cpu/cpuX/)?trace).  The only difference
PREEMPT_VOLUNTARY does is that might_resched might reschedule.  Both
should't introduce regressions.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Cc: Russell King <linux@arm.linux.org.uk>
      d45a398f
  21. 31 7月, 2009 3 次提交
  23. 24 7月, 2009 3 次提交
  25. 17 7月, 2009 1 次提交
  27. 07 7月, 2009 1 次提交
  29. 06 7月, 2009 1 次提交
  31. 03 7月, 2009 2 次提交
  33. 17 6月, 2009 1 次提交
    • M
      [ARM] S3C64XX: Initial support for DVFS · b3748ddd
      由 Mark Brown 提交于 
      This patch provides initial support for CPU frequency scaling on the
Samsung S3C ARM processors. Currently only S3C6410 processors are
supported, though addition of another data table with supported clock
rates should be sufficient to enable support for further CPUs.

Use the regulator framework to provide optional support for DVFS in
the S3C cpufreq driver. When a software controllable regulator is
configured the driver will use it to lower the supply voltage when
running at a lower frequency, giving improved power savings.

When regulator support is disabled or no regulator can be obtained
for VDDARM the driver will fall back to scaling only the frequency.
Signed-off-by: NMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: NBen Dooks <ben-linux@fluff.org>
      b3748ddd
  35. 11 6月, 2009 2 次提交
  37. 09 6月, 2009 2 次提交
  39. 31 5月, 2009 1 次提交
  41. 30 5月, 2009 4 次提交
  43. 29 5月, 2009 1 次提交
    • D
      davinci: add SRAM allocator · 20e9969b
      由 David Brownell 提交于 
      Provide a generic SRAM allocator using genalloc, and vaguely
modeled after what AVR32 uses.  This builds on top of the
static CPU mapping set up in the previous patch, and returns
DMA mappings as requested (if possible).

Compared to its OMAP cousin, there's no current support for
(currently non-existent) DaVinci power management code running
in SRAM; and this has ways to deallocate, instead of being
allocate-only.

The initial user of this should probably be the audio code,
because EDMA from DDR is subject to various dropouts on at
least DM355 and DM6446 chips.
Signed-off-by: NDavid Brownell <dbrownell@users.sourceforge.net>
Signed-off-by: NKevin Hilman <khilman@deeprootsystems.com>
      20e9969b
  45. 18 5月, 2009 1 次提交
    • M
      [ARM] Double check memmap is actually valid with a memmap has unexpected holes V2 · eb33575c
      由 Mel Gorman 提交于 
      pfn_valid() is meant to be able to tell if a given PFN has valid memmap
associated with it or not. In FLATMEM, it is expected that holes always
have valid memmap as long as there is valid PFNs either side of the hole.
In SPARSEMEM, it is assumed that a valid section has a memmap for the
entire section.

However, ARM and maybe other embedded architectures in the future free
memmap backing holes to save memory on the assumption the memmap is never
used. The page_zone linkages are then broken even though pfn_valid()
returns true. A walker of the full memmap must then do this additional
check to ensure the memmap they are looking at is sane by making sure the
zone and PFN linkages are still valid. This is expensive, but walkers of
the full memmap are extremely rare.

This was caught before for FLATMEM and hacked around but it hits again for
SPARSEMEM because the page_zone linkages can look ok where the PFN linkages
are totally screwed. This looks like a hatchet job but the reality is that
any clean solution would end up consumning all the memory saved by punching
these unexpected holes in the memmap. For example, we tried marking the
memmap within the section invalid but the section size exceeds the size of
the hole in most cases so pfn_valid() starts returning false where valid
memmap exists. Shrinking the size of the section would increase memory
consumption offsetting the gains.

This patch identifies when an architecture is punching unexpected holes
in the memmap that the memory model cannot automatically detect and sets
ARCH_HAS_HOLES_MEMORYMODEL. At the moment, this is restricted to EP93xx
which is the model sub-architecture this has been reported on but may expand
later. When set, walkers of the full memmap must call memmap_valid_within()
for each PFN and passing in what it expects the page and zone to be for
that PFN. If it finds the linkages to be broken, it assumes the memmap is
invalid for that PFN.
Signed-off-by: NMel Gorman <mel@csn.ul.ie>
Signed-off-by: NRussell King <rmk+kernel@arm.linux.org.uk>
      eb33575c