Since Exynos SoCs does not follow most of the semantics of older SoCs
when configuring the system to enter sleep, there is no reason to rely
on the legacy Samsung PM core anymore.

This patch adds local Exynos suspend ops and removes all the code left
unnecessary. As a side effect, suspend support on Exynos becomes
multiplatform-friendly.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch simplifies Exynos PM initialization and makes it
multiplatform friendly by replacing initcalls used originally to invoke
all the initialization code with explicit function calls.

In addition, an useless subsys_interface is removed, as all its .add_dev
callback did was setting two function pointers.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

CONFIG_PM means that at least one of CONFIG_PM_SLEEP and
CONFIG_PM_RUNTIME is enabled, while multiple entries in
mach-exynos/Kconfig abused it to enable sleep- and runtime-specific
functionality.

This patch fixes this abuse by replacing dependencies on CONFIG_PM with
appropriate dependencies on either CONFIG_PM_SLEEP or CONFIG_PM_RUNTIME,
whichever is appropriate.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

To allow using Samsung PM memory check helpers on platforms that do not
use the legacy Samsung PM core, this patch moves prototypes of relevant
functions to plat/pm-common.h header.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

To separate legacy PM code from generic helpers, this patch moves the
generic register save/restore helpers to a new file called pm-common.c
that is compiled always when CONFIG_PM_SLEEP is enabled, to allow
platforms that do not want to use the legacy PM code use the generic
helpers.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Not all Samsung SoC platforms are going to use the legacy Samsung PM
code enabled by CONFIG_SAMSUNG_PM_DEBUG. To allow using Samsung PM debug
helpers on such platforms, related code is moved to separate file and
a plat/pm-common.h header is added to separate legacy and generic code.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch removes one-line functions that was used just to pass
constant arguments to lower level functions. After previous patches the
need for those constants has been eliminated, so the main functions can
be called directly.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch modifies Samsung PM debug helpers to use a multiplatform
friendly way of getting base address of debug UART port, so instead
of using a per-mach static macro, a generic debug_ll_addr() helper
is used.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The only SoC that does not have DIVSLOT register is S3C2410, so instead
of exporting a variable for platforms to set if DIVSLOT register should
be preserved, it's enough to simply check whether we are running on
a S3C2410 instead.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Due to the S3C2410 SoC being quite different from other S3C24xx SoCs
in some aspects, such as availability of DIVSLOT register in its UART
blocks, there is a need sometimes to check whether we are running on
this SoC, not just the S3C24xx series. This patch adds soc_is_s3c2410()
helper function for this purpose.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Trying to resume l2x0 if it was not enabled before suspend leads to
system crash. This patch prevents this by checking if l2x0_regs_phys is
a valid pointer to l2x0 context data saved on initialization.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

All Samsung platforms now use the generic uncompress.h so all the
custom ones can be removed.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

All Samsung platforms, not only Exynos, use the custom uncompress.h
simply to setup the uart for the initial debug output. This can also
be done using the generic uncompress.h.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Now that we can use the generic uncompres.h file, there is no need
for the machine specific header. Remove it.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

As a pre-requisite step towards enabling multi-platform support
for Exynos, enable it to use generic uncompress.h instead of the
one provided in machine code.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NArnd Bergmann <arnd@arndb.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

plat/rtc-core.h is only referenced from mach-s3c24xx. Hence
move it there to de-populate the plat directory. While at it
also do some cleanup of the header file.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

plat/devs.h is not required in this file.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This file is only compiled when SAMSUNG_ATAGS is enabled, hence not
for Exynos platform.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
[kgene.kim@samsung.com: squashed into one]
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

There are no more users of this file, it can be deleted now.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

regs-serial.h only includes linux/serial_s3c.h. Include this header
directly to remove unnecessary platform dependency.
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
[broonie@linaro.org: Acked for S3C64XX related changes]
Acked-by: NMark Brown <broonie@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

regs-serial.h only includes linux/serial_s3c.h. Include this
header directly in samsung.S to remove unnecessary platform
dependency.
Signed-off-by: NSachin Kamat <sachin.kamat@linaro.org>
Signed-off-by: NTushar Behera <tushar.behera@linaro.org>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

All the suspend/resume handling is already implemented in Exynos4 clock
driver, so this legacy code can be safely dropped.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

As of now, part of Exynos4 clock suspend/resume handling is located
in mach-exynos/pm.c, which is not where code accessing CMU registers
should reside.

This patch implements all the necessary suspend/resume handling code
in Exynos4 clock driver to allow dropping that old code.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Since all SoC drivers have been moved to local suspend/resume handling,
the old code can be safely dropped.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Since there are multiple differences in how suspend/resume of particular
Exynos SoCs must be handled, SoC driver is better place for
suspend/resume handlers and so this patch moves them.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

As suspend/resume handlers are being moved to SoC specific code, due to
differencies in suspend/resume handling of particular SoCs, to minimize
code duplication this patch provides common register save/restore
helpers that save/restore given list of registers of clock controller.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Acked-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

This patch simplifies a bit clock initialization code by removing
remnants of non-DT clock initialization, such as reg_base and xom values
passed in function parameters.
Signed-off-by: NTomasz Figa <t.figa@samsung.com>
Acked-by: NKyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: NThomas Abraham <thomas.ab@samsung.com>
Reviewed-by: NSylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Commit c67d0f29 ("ARM: s3c24xx: get rid of custom <mach/gpio.h>")
got rid of the Kconfig symbols S3C24XX_GPIO_EXTRA64 and
S3C24XX_GPIO_EXTRA128. It missed one select of both of these symbols,
so get rid of those now.
Signed-off-by: NPaul Bolle <pebolle@tiscali.nl>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

The function is nearly empty and samsung_cpu_rev is static
so already 0 making the function obsolete, therefore remove
it.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Commit 48cf83dc(ARM: samsung: remove unused tick.h) removed some
occurences of tick.h. tick.h itself and s3c24xx_ostimer_pending
was only used by the old timer driver and is not used anymore.

Therefore remove the last 3 occurences.
Signed-off-by: NHeiko Stuebner <heiko@sntech.de>
Reviewed-by: NTomasz Figa <t.figa@samsung.com>
Signed-off-by: NKukjin Kim <kgene.kim@samsung.com>

Pull parisc updates from Helge Deller:
 "The three major changes in this patchset is a implementation for
  flexible userspace memory maps, cache-flushing fixes (again), and a
  long-discussed ABI change to make EWOULDBLOCK the same value as
  EAGAIN.

  parisc has been the only platform where we had EWOULDBLOCK != EAGAIN
  to keep HP-UX compatibility.  Since we will probably never implement
  full HP-UX support, we prefer to drop this compatibility to make it
  easier for us with Linux userspace programs which mostly never checked
  for both values.  We don't expect major fall-outs because of this
  change, and if we face some, we will simply rebuild the necessary
  applications in the debian archives"

* 'parisc-3.14' of git://git.kernel.org/pub/scm/linux/kernel/git/deller/parisc-linux:
  parisc: add flexible mmap memory layout support
  parisc: Make EWOULDBLOCK be equal to EAGAIN on parisc
  parisc: convert uapi/asm/stat.h to use native types only
  parisc: wire up sched_setattr and sched_getattr
  parisc: fix cache-flushing
  parisc/sti_console: prefer Linux fonts over built-in ROM fonts

HPFS needs to load 4 consecutive 512-byte sectors when accessing the
directory nodes or bitmaps.  We can't switch to 2048-byte block size
because files are allocated in the units of 512-byte sectors.

Previously, the driver would allocate a 2048-byte area using kmalloc,
copy the data from four buffers to this area and eventually copy them
back if they were modified.

In the current implementation of the buffer cache, buffers are allocated
in the pagecache.  That means that 4 consecutive 512-byte buffers are
stored in consecutive areas in the kernel address space.  So, we don't
need to allocate extra memory and copy the content of the buffers there.

This patch optimizes the code to avoid copying the buffers.  It checks
if the four buffers are stored in contiguous memory - if they are not,
it falls back to allocating a 2048-byte area and copying data there.
Signed-off-by: NMikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Previously, hpfs scanned all bitmaps each time the user asked for free
space using statfs.  This patch changes it so that hpfs scans the
bitmaps only once, remembes the free space and on next invocation of
statfs it returns the value instantly.

New versions of wine are hammering on the statfs syscall very heavily,
making some games unplayable when they're stored on hpfs, with load
times in minutes.

This should be backported to the stable kernels because it fixes
user-visible problem (excessive level load times in wine).
Signed-off-by: NMikulas Patocka <mikulas@artax.karlin.mff.cuni.cz>
Cc: stable@vger.kernel.org
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

Add support for the flexible mmap memory layout (as described in
http://lwn.net/Articles/91829). This is especially very interesting on
parisc since we currently only support 32bit userspace (even with a
64bit Linux kernel).
Signed-off-by: NHelge Deller <deller@gmx.de>

On Linux, only parisc uses a different value for EWOULDBLOCK which
causes a lot of troubles for applications not checking for both values.
Since the hpux compat is long dead, make EWOULDBLOCK behave the same as
all other architectures.
Signed-off-by: NGuy Martin <gmsoft@tuxicoman.be>
Signed-off-by: NHelge Deller <deller@gmx.de>