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Author SHA1 Message Date
Alim Akhtar
2cbb515745 clk: samsung: exynos7: Adds missing clocks gates of CMU_TOPC
This adds some of the missing GATE clocks of CMU_TOPC block.

Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-09-15 11:02:29 +02:00
Alim Akhtar
dc504b2277 clk: samsung: exynos7: Change the CMU_TOPC block clock names
Corrects the CMU_TOPC block clock names as per user manual.
This does not change any functionalities.

Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-09-15 11:02:01 +02:00
Alim Akhtar
167c9e4d6d clk: samsung: exynos7: Correct nr_clk_ids for fsys1
nr_clk_ids for FSYS1 block is wrongly set as TOP1 block,
this patch corrects it.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-09-15 11:01:34 +02:00
Alim Akhtar
7cca2e0744 clk: samsung: exynos7: Correct nr_clk_ids for fsys0
This patch corrects the nr_clk_ids for fsys0 block
which is wrongly set to number of clocks of the TOP1 CMU.
This also adjusts the gate clocks order.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-09-15 11:00:08 +02:00
Alim Akhtar
cfc7588a31 clk: samsung: exynos7: Fix CMU TOP1 block
As per UM, sclk_mmc2 is bit 16 of SEL_TOP1_FSYS0. Also the DIV
and the GATE clocks are at bit 16 in their respective registers.
For mmc1 and mmc0 clock MUXs are in TOP1_FSYS11 instead of TOP1_FSYS1.
And their DIV and GATE clks are in xxx_TOP1_FSYS11 instead of TOP1_FSYS1.
This patch corrects it.
This also adds xxx_FSYS11 to be saved/restore during s2r cycles.

Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-09-15 10:59:28 +02:00
Alim Akhtar
fa9f3a5264 clk: samsung: exynos7: Fix CMU TOPC block clock
Corrects the bit width of DIV_TOPC3 register.
These are wrongly set to 3 which should be 4 bit wide as per UM.
This also adjusts the MUX clock order.

Signed-off-by: Alim Akhtar <alim.akhtar@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
2015-09-15 10:58:10 +02:00
Nathan Sullivan
c1ceb5fff0 Documentation: bindings: add doc for zynq USB
Document the binding for the zynq specific chipidea UDC binding.

Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
2015-09-15 16:08:54 +08:00
Nathan Sullivan
84bc70f94d usb: chipidea: add xilinx zynq platform data
Due to having hardware tx buffers less than 512 bytes in size, streaming
must be enabled on the Zynq for the udc to work at all.  Add platform data
specific to the Zynq udc, which does not set the CI_HDRC_DISABLE_STREAMING
flag.

Based on a patch by the same name from the Xilinx vendor tree.

Signed-off-by: Nathan Sullivan <nathan.sullivan@ni.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
2015-09-15 16:08:49 +08:00
Peter Chen
56ffa1d154 usb: chipidea: udc: using the correct stall implementation
According to spec, there are functional and protocol stalls.

For functional stall, it is for bulk and interrupt endpoints,
below are cases for it:
- Host sends SET_FEATURE request for Set-Halt, the udc driver
needs to set stall, and return true unconditionally.
- The gadget driver may call usb_ep_set_halt to stall certain
endpoints, if there is a transfer in pending, the udc driver
should not set stall, and return -EAGAIN accordingly.
These two kinds of stall need to be cleared by host using CLEAR_FEATURE
request (Clear-Halt).

For protocol stall, it is for control endpoint, this stall will
be set if the control request has failed. This stall will be
cleared by next setup request (hardware will do it).

It fixed usbtest (drivers/usb/misc/usbtest.c) Test 13 "set/clear halt"
test failure, meanwhile, this change has been verified by
USB2 CV Compliance Test and MSC Tests.

Cc: <stable@vger.kernel.org> #3.10+
Cc: Alan Stern <stern@rowland.harvard.edu>
Cc: Felipe Balbi <balbi@ti.com>
Signed-off-by: Peter Chen <peter.chen@freescale.com>
2015-09-15 16:08:28 +08:00
Thomas Hellstrom
e30f3963f2 drm/ttm: Fix memory space allocation v2
In the event that TTM doesn't find a compatible memory type for the
driver's first placement choice (placement without eviction), TTM
returns -EINVAL without trying the driver's second choice.
This causes problems on vmwgfx when VRAM is disabled before first modeset
and during VT switches when fbdev is not enabled.

Fix this by also trying the driver's second choice before returning
-EINVAL.

v2: Also check that man->use_type is true for the driver's second choice.
Fixes a bug where disallowed memory types could be used.

Signed-off-by: Thomas Hellstrom <thellstrom@vmware.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Sinclair Yeh <syeh@vmware.com>
2015-09-15 00:57:01 -07:00
Ingo Molnar
9059b284ca perf/core improvements and fixes:
User visible:
 
 - Add 'socket' sort entry, to sort by the processor socket in
   'perf top' and 'perf report' (Kan Liang)
 
 - Introduce --socket-filter to 'perf report', for filtering by processor
   socket (Kan Liang)
 
 - Add new "Zoom into Processor Socket" operation in the perf hists browser,
   used in 'perf top' and 'perf report' (Kan Liang)
 
 - Fix the 'CPU' hist browser column width calculation (Arnaldo Carvalho de Melo)
 
 Infrastructure:
 
 - 'perf test' fixes for the object code reading entry (Jan Stancek)
 
 - Add processor socket and cpu topology 'perf test' entries (Kan Liang)
 
 - Introduce more sysfs__read_TYPE() helpers (Arnaldo Carvalho de Melo)
 
 - Group cpu information reading functions in tools/lib/api/cpu.[ch],
   starting with cpu__get_max_freq() from a patchkit by Kan Liang
   (Arnaldo Carvalho de Melo)
 
 - Retrieve the MSR PMU type from a perf.data file header and store it
   in struct perf_env (Kan Liang)
 
 - Add tools/include into CTAGS file list (Jiri Olsa)
 
 - Add iterator function for perf tests (Matt Fleming)
 
 - Switch to tracing_patch interface (Jiri Olsa)
 
 Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
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Merge tag 'perf-core-for-mingo-2' of git://git.kernel.org/pub/scm/linux/kernel/git/acme/linux into perf/core

Pull perf/core improvements and fixes from Arnaldo Carvalho de Melo:

User visible changes:

  - Add 'socket' sort entry, to sort by the processor socket in
    'perf top' and 'perf report'. (Kan Liang)

  - Introduce --socket-filter to 'perf report', for filtering by processor
    socket. (Kan Liang)

  - Add new "Zoom into Processor Socket" operation in the perf hists browser,
    used in 'perf top' and 'perf report'. (Kan Liang)

  - Fix the 'CPU' hist browser column width calculation. (Arnaldo Carvalho de Melo)

Infrastructure changes:

  - 'perf test' fixes for the object code reading entry. (Jan Stancek)

  - Add processor socket and cpu topology 'perf test' entries. (Kan Liang)

  - Introduce more sysfs__read_TYPE() helpers. (Arnaldo Carvalho de Melo)

  - Group cpu information reading functions in tools/lib/api/cpu.[ch],
    starting with cpu__get_max_freq() from a patchkit by Kan Liang.
    (Arnaldo Carvalho de Melo)

  - Retrieve the MSR PMU type from a perf.data file header and store it
    in struct perf_env. (Kan Liang)

  - Add tools/include into CTAGS file list. (Jiri Olsa)

  - Add iterator function for perf tests. (Matt Fleming)

  - Switch to tracing_patch interface. (Jiri Olsa)

Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-09-15 08:50:59 +02:00
Denys Vlasenko
73477bbb09 x86/fpu/math-emu: Remove !NO_UNDOC_CODE
We always want to support all FPU opcodes, including
undocumented ones. That define was fully justified ~20 years ago
but not today. Let's not complicate the code with it.

Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/1440699330-1305-1-git-send-email-dvlasenk@redhat.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-09-15 08:01:46 +02:00
Jonathan Corbet
1975dbc276 locking/static_keys: Fix up the static keys documentation
Fix a few small mistakes in the static key documentation and
delete an unneeded sentence.

Suggested-by: Jason Baron <jbaron@akamai.com>
Signed-off-by: Jonathan Corbet <corbet@lwn.net>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20150914171105.511e1e21@lwn.net
Signed-off-by: Ingo Molnar <mingo@kernel.org>
2015-09-15 07:12:06 +02:00
Jeff Mahoney
a30e577c96 btrfs: skip waiting on ordered range for special files
In btrfs_evict_inode, we properly truncate the page cache for evicted
inodes but then we call btrfs_wait_ordered_range for every inode as well.
It's the right thing to do for regular files but results in incorrect
behavior for device inodes for block devices.

filemap_fdatawrite_range gets called with inode->i_mapping which gets
resolved to the block device inode before getting passed to
wbc_attach_fdatawrite_inode and ultimately to inode_to_bdi.  What happens
next depends on whether there's an open file handle associated with the
inode.  If there is, we write to the block device, which is unexpected
behavior.  If there isn't, we through normally and inode->i_data is used.
We can also end up racing against open/close which can result in crashes
when i_mapping points to a block device inode that has been closed.

Since there can't be any page cache associated with special file inodes,
it's safe to skip the btrfs_wait_ordered_range call entirely and avoid
the problem.

Cc: <stable@vger.kernel.org>
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=100911
Tested-by: Christoph Biedl <linux-kernel.bfrz@manchmal.in-ulm.de>
Signed-off-by: Jeff Mahoney <jeffm@suse.com>
Reviewed-by: Filipe Manana <fdmanana@suse.com>
2015-09-15 02:21:08 +01:00
Sudeep Holla
bcb2b0b2ba ACPI: Eliminate CONFIG_.*{, _MODULE} #ifdef in favor of IS_ENABLED()
This commit removes all CONFIG_.*{,_MODULE} in ACPI code, replacing it
with IS_ENABLED().

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 03:05:45 +02:00
Rami Rosen
f934c74507 ACPI: change acpi_sleep_proc_init() to return void
This patch changes the type of the return value of the acpi_sleep_proc_init()
method to be void, as this method never fails and its return value is never
used.

Signed-off-by: Rami Rosen <ramirose@gmail.com>\
[ rjw : Fixed up the static inline stub ]
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 03:03:15 +02:00
Rami Rosen
c33cab60bc ACPI: change init_acpi_device_notify() to return void
This patch changes the type of the return value of the init_acpi_device_notify()
method to be void, as this method never fails and its return value is never
used.

Signed-off-by: Rami Rosen <ramirose@gmail.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 03:01:01 +02:00
Rasmus Villemoes
6a0d12ef99 ACPI / scan: use kstrdup_const() in acpi_add_id()
Empirically, acpi_add_id is mostly called with string literals, so
using kstrdup_const for initializing struct acpi_hardware_id::id saves
a little run-time memory and a string copy.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:59:07 +02:00
Rasmus Villemoes
844142c3f8 ACPI / scan: constify struct acpi_hardware_id::id
This is preparation for using kstrdup_const to initialize that member.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:57:55 +02:00
Rasmus Villemoes
636c19d389 ACPI / scan: constify first argument of struct acpi_scan_handler::match
One wouldn't expect a "match" function modify the string it searches
for, and indeed the only instance of the struct
acpi_scan_handler::match callback, acpi_pnp_match, can easily be
changed. While there, update its helper matching_id().

This is also preparation for constifying struct acpi_hardware_id::id.

Signed-off-by: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:56:29 +02:00
Sudeep Holla
cf3a51059e ACPI: int340x_thermal: add missing CONFIG_ prefix
This patch adds the missing CONFIG_ prefix to INTEL_SOC_DTS_THERMAL
macros.

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:53:32 +02:00
Viresh Kumar
f59d3ee848 PM / OPP: Move cpu specific code to opp/cpu.c
Move cpu device specific code out of generic opp library, and add it to
cpu.c.

Along with that, create a core-internal opp.h header, which will be used
to share structures and function prototypes within opp core.

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:03:16 +02:00
Viresh Kumar
33692dc381 PM / OPP: Move opp core to its own directory
OPP code is expanding and is already present in multiple directories
(cpufreq and power). Lets move it to its own directory, to manage it
better.

This also moves/renames the cpufreq_opp file to cpu.c, as it will
contain helpers for cpu device. Its not just about cpufreq, other
frameworks can use OPPs as well.

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:03:16 +02:00
Viresh Kumar
8f8d37b253 PM / OPP: Prefix exported opp routines with dev_pm_opp_
That's the naming convention followed in most of opp core, but few
routines didn't follow this, fix them.

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:03:16 +02:00
Viresh Kumar
f0489a5ef4 PM / OPP: Rename opp init/free table routines
free-table routines are opposite of init-table ones, and must be named
to make that clear. Opposite of 'init' is 'exit', but those doesn't suit
really well.

Replace 'init' with 'add' and 'free' with 'remove'.

Reported-by: Pavel Machek <pavel@ucw.cz>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:03:15 +02:00
Viresh Kumar
1840995c52 PM / OPP: reuse of_parse_phandle()
We already have a better API to get the opp descriptor block's node from
cpu-node. Lets reuse that instead of creating our own routines for the
same stuff. That cleans the code a lot.

This also kills a check we had earlier (as we are using the generic API
now). Earlier we used to check if the operating-points-v2 property
contained multiple phandles instead of a single phandle.

Killing this check isn't an issue because, we only parse the first entry
with of_parse_phandle(). So, if a user passes multiple phandles, its
really his problem :)

Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2015-09-15 02:03:15 +02:00
Filipe Manana
005efedf2c Btrfs: fix read corruption of compressed and shared extents
If a file has a range pointing to a compressed extent, followed by
another range that points to the same compressed extent and a read
operation attempts to read both ranges (either completely or part of
them), the pages that correspond to the second range are incorrectly
filled with zeroes.

Consider the following example:

  File layout
  [0 - 8K]                      [8K - 24K]
      |                             |
      |                             |
   points to extent X,         points to extent X,
   offset 4K, length of 8K     offset 0, length 16K

  [extent X, compressed length = 4K uncompressed length = 16K]

If a readpages() call spans the 2 ranges, a single bio to read the extent
is submitted - extent_io.c:submit_extent_page() would only create a new
bio to cover the second range pointing to the extent if the extent it
points to had a different logical address than the extent associated with
the first range. This has a consequence of the compressed read end io
handler (compression.c:end_compressed_bio_read()) finish once the extent
is decompressed into the pages covering the first range, leaving the
remaining pages (belonging to the second range) filled with zeroes (done
by compression.c:btrfs_clear_biovec_end()).

So fix this by submitting the current bio whenever we find a range
pointing to a compressed extent that was preceded by a range with a
different extent map. This is the simplest solution for this corner
case. Making the end io callback populate both ranges (or more, if we
have multiple pointing to the same extent) is a much more complex
solution since each bio is tightly coupled with a single extent map and
the extent maps associated to the ranges pointing to the shared extent
can have different offsets and lengths.

The following test case for fstests triggers the issue:

  seq=`basename $0`
  seqres=$RESULT_DIR/$seq
  echo "QA output created by $seq"
  tmp=/tmp/$$
  status=1	# failure is the default!
  trap "_cleanup; exit \$status" 0 1 2 3 15

  _cleanup()
  {
      rm -f $tmp.*
  }

  # get standard environment, filters and checks
  . ./common/rc
  . ./common/filter

  # real QA test starts here
  _need_to_be_root
  _supported_fs btrfs
  _supported_os Linux
  _require_scratch
  _require_cloner

  rm -f $seqres.full

  test_clone_and_read_compressed_extent()
  {
      local mount_opts=$1

      _scratch_mkfs >>$seqres.full 2>&1
      _scratch_mount $mount_opts

      # Create a test file with a single extent that is compressed (the
      # data we write into it is highly compressible no matter which
      # compression algorithm is used, zlib or lzo).
      $XFS_IO_PROG -f -c "pwrite -S 0xaa 0K 4K"        \
                      -c "pwrite -S 0xbb 4K 8K"        \
                      -c "pwrite -S 0xcc 12K 4K"       \
                      $SCRATCH_MNT/foo | _filter_xfs_io

      # Now clone our extent into an adjacent offset.
      $CLONER_PROG -s $((4 * 1024)) -d $((16 * 1024)) -l $((8 * 1024)) \
          $SCRATCH_MNT/foo $SCRATCH_MNT/foo

      # Same as before but for this file we clone the extent into a lower
      # file offset.
      $XFS_IO_PROG -f -c "pwrite -S 0xaa 8K 4K"         \
                      -c "pwrite -S 0xbb 12K 8K"        \
                      -c "pwrite -S 0xcc 20K 4K"        \
                      $SCRATCH_MNT/bar | _filter_xfs_io

      $CLONER_PROG -s $((12 * 1024)) -d 0 -l $((8 * 1024)) \
          $SCRATCH_MNT/bar $SCRATCH_MNT/bar

      echo "File digests before unmounting filesystem:"
      md5sum $SCRATCH_MNT/foo | _filter_scratch
      md5sum $SCRATCH_MNT/bar | _filter_scratch

      # Evicting the inode or clearing the page cache before reading
      # again the file would also trigger the bug - reads were returning
      # all bytes in the range corresponding to the second reference to
      # the extent with a value of 0, but the correct data was persisted
      # (it was a bug exclusively in the read path). The issue happened
      # only if the same readpages() call targeted pages belonging to the
      # first and second ranges that point to the same compressed extent.
      _scratch_remount

      echo "File digests after mounting filesystem again:"
      # Must match the same digests we got before.
      md5sum $SCRATCH_MNT/foo | _filter_scratch
      md5sum $SCRATCH_MNT/bar | _filter_scratch
  }

  echo -e "\nTesting with zlib compression..."
  test_clone_and_read_compressed_extent "-o compress=zlib"

  _scratch_unmount

  echo -e "\nTesting with lzo compression..."
  test_clone_and_read_compressed_extent "-o compress=lzo"

  status=0
  exit

Cc: stable@vger.kernel.org
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Reviewed-by: Qu Wenruo<quwenruo@cn.fujitsu.com>
Reviewed-by: Liu Bo <bo.li.liu@oracle.com>
2015-09-15 00:59:31 +01:00
Linus Torvalds
d25ed277fb A couple build fixes for drivers introduced in the merge window and a
handful of patches to add more critical clocks on rockchip SoCs that
 are affected by newly introduced gpio clock handling.
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Merge tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux

Pull clk fixes from Stephen Boyd:
 "A couple build fixes for drivers introduced in the merge window and a
  handful of patches to add more critical clocks on rockchip SoCs that
  are affected by newly introduced gpio clock handling"

* tag 'clk-fixes-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux:
  clk: rockchip: Add pclk_peri to critical clocks on RK3066/RK3188
  clk: rockchip: add pclk_cpu to the list of rk3188 critical clocks
  clk: rockchip: handle critical clocks after registering all clocks
  clk: Hi6220: separately build stub clock driver
  clk: h8s2678: Fix compile error
2015-09-14 16:58:35 -07:00
Rafael J. Wysocki
504a337499 ACPI / property: Extend device_get_next_child_node() to data-only nodes
Make device_get_next_child_node() work with ACPI data-only subnodes
introduced previously.

Namely, replace acpi_get_next_child() with acpi_get_next_subnode()
that can handle (and return) child device objects as well as child
data-only subnodes of the given device and modify the ACPI part
of the GPIO subsystem to handle data-only subnodes returned by it.

To that end, introduce acpi_node_get_gpiod() taking a struct
fwnode_handle pointer as the first argument.  That argument may
point to an ACPI device object as well as to a data-only subnode
and the function should do the right thing (ie. look for the matching
GPIO descriptor correctly) in either case.

Next, modify fwnode_get_named_gpiod() to use acpi_node_get_gpiod()
instead of acpi_get_gpiod_by_index() which automatically causes
devm_get_gpiod_from_child() to work with ACPI data-only subnodes
that may be returned by device_get_next_child_node() which in turn
is required by the users of that function (the gpio_keys_polled
and gpio-leds drivers).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2015-09-15 01:47:34 +02:00
Rafael J. Wysocki
d079524a33 ACPI / gpio: Split acpi_get_gpiod_by_index()
Split acpi_get_gpiod_by_index() into three smaller routines to
allow the subsequent change of the generic firmware node properties
code to be more strarightforward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
2015-09-15 01:47:34 +02:00
Rafael J. Wysocki
3a7a2ab839 ACPI / property: Extend fwnode_property_* to data-only subnodes
Modify is_acpi_node() to return "true" for ACPI data-only subnodes as
well as for ACPI device objects and change the name of to_acpi_node()
to to_acpi_device_node() so it is clear that it covers ACPI device
objects only.  Accordingly, introduce to_acpi_data_node() to cover
data-only subnodes in an analogous way.

With that, make the fwnode_property_* family of functions work with
ACPI data-only subnodes introduced previously.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2015-09-15 01:47:34 +02:00
Rafael J. Wysocki
263b4c1a64 ACPI / property: Expose data-only subnodes via sysfs
Add infrastructure needed to expose data-only subnodes of ACPI
device objects introduced previously via sysfs.

Each data-only subnode is represented as a sysfs directory under
the directory corresponding to its parent object (a device or a
data-only subnode).  Each of them has a "path" attribute (containing
the full ACPI namespace path to the object the subnode data come from)
at this time.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2015-09-15 01:47:34 +02:00
Rafael J. Wysocki
445b0eb058 ACPI / property: Add support for data-only subnodes
In some cases, the information expressed via device properties is
hierarchical by nature.  For example, the properties of a composite
device consisting of multiple semi-dependent components may need
to be represented in the form of a tree of property data sets
corresponding to specific components of the device.

Unfortunately, using ACPI device objects for this purpose turns out
to be problematic, mostly due to the assumption made by some operating
systems (that platform firmware generally needs to work with) that
each device object in the ACPI namespace represents a device requiring
a separate driver.  That assumption leads to complications which
reportedly are impractically difficult to overcome and a different
approach is needed for the sake of interoperability.

The approach implemented here is based on extending _DSD via pointers
(links) to additional ACPI objects returning data packages formatted
in accordance with the _DSD formatting rules defined by Section 6.2.5
of ACPI 6.  Those additional objects are referred to as data-only
subnodes of the device object containing the _DSD pointing to them.

The links to them need to be located in a separate section of the
_DSD data package following UUID dbb8e3e6-5886-4ba6-8795-1319f52a966b
referred to as the Hierarchical Data Extension UUID as defined in [1].
Each of them is represented by a package of two strings.  The first
string in that package (the key) is regarded as the name of the
data-only subnode pointed to by the link.  The second string in it
(the target) is expected to hold the ACPI namespace path (possibly
utilizing the usual ACPI namespace search rules) of an ACPI object
evaluating to a data package extending the _DSD.

The device properties initialization code follows those links,
creates a struct acpi_data_node object for each of them to store
the data returned by the ACPI object pointed to by it and processes
those data recursively (which may lead to the creation of more
struct acpi_data_node objects if the returned data package contains
the Hierarchical Data Extension UUID section with more links in it).

All of the struct acpi_data_node objects are present until the the
ACPI device object containing the _DSD with links to them is deleted
and they are deleted along with that object.

[1]: http://www.uefi.org/sites/default/files/resources/_DSD-hierarchical-data-extension-UUID-v1.pdf

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2015-09-15 01:47:34 +02:00
Rafael J. Wysocki
bd8191cc8a ACPI / property: Add routine for extraction of _DSD properties
Move the extraction of _DSD properties from acpi_init_properties()
to a separate routine called acpi_extract_properties() to make the
subsequent changes more straightforward.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
2015-09-15 01:47:33 +02:00
Rafael J. Wysocki
4184a8fc57 Merge branch 'for-rafael' of https://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq into pm-devfreq
Pull devfreq updates for v4.3 from MyungJoo Ham.

* 'for-rafael' of https://git.kernel.org/pub/scm/linux/kernel/git/mzx/devfreq:
  PM / devfreq: Fix incorrect type issue.
  PM / devfreq: tegra: Update governor to use devfreq_update_stats()
  PM / devfreq: comments for get_dev_status usage updated
  PM / devfreq: drop comment about thermal setting max_freq
  PM / devfreq: cache the last call to get_dev_status()
  PM / devfreq: Drop unlikely before IS_ERR(_OR_NULL)
  PM / devfreq: exynos-ppmu: bit-wise operation bugfix.
  PM / devfreq: exynos-ppmu: Update documentation to support PPMUv2
  PM / devfreq: exynos-ppmu: Add the support of PPMUv2 for Exynos5433
  PM / devfreq: event: Remove incorrect property in exynos-ppmu DT binding

Conflicts:
	drivers/devfreq/event/exynos-ppmu.c
2015-09-15 01:29:43 +02:00
Jon Mason
de0d542338 ARM: multi_v7_defconfig: Add NSP to defconfig
Add the Broadcom Northstar Plus SoC to the multi_v7_defconfig

Signed-off-by: Jon Mason <jonmason@broadcom.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 16:15:08 -07:00
Jon Mason
63f37ddf5c MAINTAINERS: add entry for the Broadcom Northstar Plus SoCs
Modify the iProc MAINTAINER to cover the Nortstar Plus SoCs, and add me
to the list of people responsible for it.  Since iProc is a family of
SoCs that includes more than just Cygnus (i.e., Northstar (BCM5301X),
Northstar Plus, Northstar 2, and a number of other platforms), remove it
from the title to avoid any future confusion.

Signed-off-by: Jon Mason <jonmason@broadcom.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 16:11:36 -07:00
Brian Norris
aca770fb4f ARM: dts: brcmstb: add BCM7445 system PM DT nodes
Need the aon-ctrl, boot SRAM, and memory_controller descriptions.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
[florian: remove wake-timer, aon-pm-l2-intc duplicate]
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:48:05 -07:00
Brian Norris
9c07d61f1b Documentation: dt: brcmstb: add system PM bindings
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:48:04 -07:00
Hauke Mehrtens
bb1d8fba19 ARM: BCM5301X: add NAND flash chip description for Asus RT-AC87U
The NAND flash chip description were not imported for the Asus RT-AC87U
dts file when this was done for all the other dts files, because these
patches were send in parallel.

This adds a missing NAND flash chip description to this patch:
commit 9faa5960ee
Author: Hauke Mehrtens <hauke@hauke-m.de>
Date: Fri May 29 23:39:47 2015 +0200

ARM: BCM5301X: add NAND flash chip description

Signed-off-by: Hauke Mehrtens <hauke@hauke-m.de>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:48:03 -07:00
Rafał Miłecki
bfae737540 ARM: BCM5301X: Add DT for Netgear R7000
Signed-off-by: Rafał Miłecki <zajec5@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:48:03 -07:00
Jon Mason
7b2e987de2 ARM: NSP: add minimal Northstar Plus device tree
Add a very minimalistic set of Northstar Plus Device Tree files which
describes the SoC and the BCM958625 implementation.  The perpherials
described are:

ARM Cortex A9 CPU
2 8250 UARTs
ARM GIC
PL310 L2 Cache
ARM A9 Global timer

Signed-off-by: Kapil Hali <kapilh@broadcom.com>
Signed-off-by: Jon Mason <jonmason@broadcom.com>
Reviewed-by: Ray Jui <rjui@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:48:02 -07:00
Jon Mason
40b43419e6 dt-bindings: Create Documentation for NSP DT bindings
Add the documentation for the Broadcom Northstar Plus device tree
bindings.

Signed-off-by: Jon Mason <jonmason@broadcom.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:48:01 -07:00
Bamvor Jian Zhang
ae78581805 selftests: exec: revert to default emit rule
With the previous patch, the installation method change from install
to rsync. There is no need to create subdir during test, the
default EMIT_TESTS is enough.

This patch essentially revert commit 84cbd9e4 ("selftests/exec: do not
install subdir as it is already created").

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-09-14 16:45:05 -06:00
Brian Norris
d52fad2620 soc: add stubs for brcmstb SoC's
Used on BCM7xxx Set-Top Box chips (e.g., BCM7445).

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:44:18 -07:00
Jon Mason
1f3e9a6eda ARM: NSP: Add basic support for Broadcom Northstar Plus SoC
Broadcom Northstar Plus family of SoCs are used for switching
control and management applications as well as residential
router/gateway applications. The SoC features dual core Cortex
A9 ARM CPUs, integrating several peripheral interfaces including
multiple Gigabit Ethernet PHYs, DDR3 memory, PCIE Gen-2, USB 2.0
and USB 3.0, serial and NAND flash, SATA and several other IO
controllers.

Signed-off-by: Kapil Hali <kapilh@broadcom.com>
Signed-off-by: Jon Mason <jonmason@broadcom.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Florian Fainelli <f.fainelli@gmail.com>
2015-09-14 15:44:18 -07:00
Bamvor Jian Zhang
900d65ee11 selftests: change install command to rsync
The command of install could not handle the special files in exec
testcases, change the default rule to rsync to fix this.

The installation is unchanged after this commit.

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-09-14 16:43:51 -06:00
Bamvor Jian Zhang
b11054b959 selftests: mqueue: simplify the Makefile
Use make's implict rule for building simple C programs.

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-09-14 16:43:24 -06:00
Bamvor Jian Zhang
cc19ada734 selftests: mqueue: allow extra cflags
Change from = to += in order to allows the user to pass whatever
CFLAGS they wish(E.g. pass the proper headers and librareis
(popt.h and libpopt.so) in cross-compiling)

Suggested-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-09-14 16:42:55 -06:00
Bamvor Jian Zhang
1087d01917 selftests: rename jump label to static_keys
Commit 2bf9e0ab08 ("locking/static_keys: Provide a selftest")
renamed jump_label directory to static_keys and failed to update
the Makefile, causing the selftests build to fail.

This commit fixes it by updating the Makefile with the new name
and also moves the entry into the correct position to keep the
list alphabetically sorted.

Fixes: 2bf9e0ab08 ("locking/static_keys: Provide a selftest")
Signed-off-by: Bamvor Jian Zhang <bamvor.zhangjian@linaro.org>
Acked-by: Shuah Khan <shuahkh@osg.samsung.com>
Acked-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Shuah Khan <shuahkh@osg.samsung.com>
2015-09-14 16:42:23 -06:00