Commit Graph

2536 Commits

Author SHA1 Message Date
Mark Brown
ee4629f5b2 Merge remote-tracking branches 'spi/fix/img-spfi' and 'spi/fix/msiof' into spi-linus 2014-12-24 12:57:54 +00:00
Andrew Bresticker
76fe5e95fa spi: img-spfi: Increase DMA burst size
A 1-byte burst size is rather inefficient and has been shown to cause
TX issues during testing.  Increase the DMA burst size to 4-bytes for
both RX and TX DMA when using the 8-bit FIFO.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-24 12:20:03 +00:00
Andrew Bresticker
c0e7dc21d3 spi: img-spfi: Enable controller before starting TX DMA
It is recommended that the SPFI controller be enabled (i.e. setting
SPFI_EN in SPFI_CONTROL) before TX DMA begins.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-22 17:52:07 +00:00
Rafael J. Wysocki
47164fdb3b spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
A couple of new CONFIG_PM_RUNTIME users have been added recently
in the SPI subsystem.

However, after commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if
PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so
#ifdef blocks depending on CONFIG_PM_RUNTIME may now be changed to
depend on CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere under
drivers/spi/ (again).

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
2014-12-19 15:25:31 +01:00
Linus Torvalds
c0f486fde3 More ACPI and power management updates for 3.19-rc1
- Fix a regression in leds-gpio introduced by a recent commit that
    inadvertently changed the name of one of the properties used by
    the driver (Fabio Estevam).
 
  - Fix a regression in the ACPI backlight driver introduced by a
    recent fix that missed one special case that had to be taken
    into account (Aaron Lu).
 
  - Drop the level of some new kernel messages from the ACPI core
    introduced by a recent commit to KERN_DEBUG which they should
    have used from the start and drop some other unuseful KERN_ERR
    messages printed by ACPI (Rafael J Wysocki).
 
  - Revert an incorrect commit modifying the cpupower tool
    (Prarit Bhargava).
 
  - Fix two regressions introduced by recent commits in the OPP
    library and clean up some existing minor issues in that code
    (Viresh Kumar).
 
  - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout
    the tree (or drop it where that can be done) in order to make
    it possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki,
    Ulf Hansson, Ludovic Desroches).  There will be one more
    "CONFIG_PM_RUNTIME removal" batch after this one, because some
    new uses of it have been introduced during the current merge
    window, but that should be sufficient to finally get rid of it.
 
  - Make the ACPI EC driver more robust against race conditions
    related to GPE handler installation failures (Lv Zheng).
 
  - Prevent the ACPI device PM core code from attempting to
    disable GPEs that it has not enabled which confuses ACPICA
    and makes it report errors unnecessarily (Rafael J Wysocki).
 
  - Add a "force" command line switch to the intel_pstate driver
    to make it possible to override the blacklisting of some
    systems in that driver if needed (Ethan Zhao).
 
  - Improve intel_pstate code documentation and add a MAINTAINERS
    entry for it (Kristen Carlson Accardi).
 
  - Make the ACPI fan driver create cooling device interfaces
    witn names that reflect the IDs of the ACPI device objects
    they are associated with, except for "generic" ACPI fans
    (PNP ID "PNP0C0B").  That's necessary for user space thermal
    management tools to be able to connect the fans with the
    parts of the system they are supposed to be cooling properly.
    From Srinivas Pandruvada.
 
 /
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Merge tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull more ACPI and power management updates from Rafael Wysocki:
 "These are regression fixes (leds-gpio, ACPI backlight driver,
  operating performance points library, ACPI device enumeration
  messages, cpupower tool), other bug fixes (ACPI EC driver, ACPI device
  PM), some cleanups in the operating performance points (OPP)
  framework, continuation of CONFIG_PM_RUNTIME elimination, a couple of
  minor intel_pstate driver changes, a new MAINTAINERS entry for it and
  an ACPI fan driver change needed for better support of thermal
  management in user space.

  Specifics:

   - Fix a regression in leds-gpio introduced by a recent commit that
     inadvertently changed the name of one of the properties used by the
     driver (Fabio Estevam).

   - Fix a regression in the ACPI backlight driver introduced by a
     recent fix that missed one special case that had to be taken into
     account (Aaron Lu).

   - Drop the level of some new kernel messages from the ACPI core
     introduced by a recent commit to KERN_DEBUG which they should have
     used from the start and drop some other unuseful KERN_ERR messages
     printed by ACPI (Rafael J Wysocki).

   - Revert an incorrect commit modifying the cpupower tool (Prarit
     Bhargava).

   - Fix two regressions introduced by recent commits in the OPP library
     and clean up some existing minor issues in that code (Viresh
     Kumar).

   - Continue to replace CONFIG_PM_RUNTIME with CONFIG_PM throughout the
     tree (or drop it where that can be done) in order to make it
     possible to eliminate CONFIG_PM_RUNTIME (Rafael J Wysocki, Ulf
     Hansson, Ludovic Desroches).

     There will be one more "CONFIG_PM_RUNTIME removal" batch after this
     one, because some new uses of it have been introduced during the
     current merge window, but that should be sufficient to finally get
     rid of it.

   - Make the ACPI EC driver more robust against race conditions related
     to GPE handler installation failures (Lv Zheng).

   - Prevent the ACPI device PM core code from attempting to disable
     GPEs that it has not enabled which confuses ACPICA and makes it
     report errors unnecessarily (Rafael J Wysocki).

   - Add a "force" command line switch to the intel_pstate driver to
     make it possible to override the blacklisting of some systems in
     that driver if needed (Ethan Zhao).

   - Improve intel_pstate code documentation and add a MAINTAINERS entry
     for it (Kristen Carlson Accardi).

   - Make the ACPI fan driver create cooling device interfaces witn
     names that reflect the IDs of the ACPI device objects they are
     associated with, except for "generic" ACPI fans (PNP ID "PNP0C0B").

     That's necessary for user space thermal management tools to be able
     to connect the fans with the parts of the system they are supposed
     to be cooling properly.  From Srinivas Pandruvada"

* tag 'pm+acpi-3.19-rc1-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm: (32 commits)
  MAINTAINERS: add entry for intel_pstate
  ACPI / video: update the skip case for acpi_video_device_in_dod()
  power / PM: Eliminate CONFIG_PM_RUNTIME
  NFC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  SCSI / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  ACPI / EC: Fix unexpected ec_remove_handlers() invocations
  Revert "tools: cpupower: fix return checks for sysfs_get_idlestate_count()"
  tracing / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  x86 / PM: Replace CONFIG_PM_RUNTIME in io_apic.c
  PM: Remove the SET_PM_RUNTIME_PM_OPS() macro
  mmc: atmel-mci: use SET_RUNTIME_PM_OPS() macro
  PM / Kconfig: Replace PM_RUNTIME with PM in dependencies
  ARM / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  sound / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  phy / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  video / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  tty / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  ACPI / PM: Do not disable wakeup GPEs that have not been enabled
  ACPI / utils: Drop error messages from acpi_evaluate_reference()
  ...
2014-12-18 20:28:33 -08:00
Hisashi Nakamura
015760563e spi: sh-msiof: Add runtime PM lock in initializing
SH-MSIOF driver is enabled autosuspend API of spi framework.
But autosuspend framework doesn't work during initializing.
So runtime PM lock is added in SH-MSIOF driver initializing.

Fixes: e2a0ba547b (spi: sh-msiof: Convert to spi core auto_runtime_pm framework)
Signed-off-by: Hisashi Nakamura <hisashi.nakamura.ak@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-12-15 17:36:45 +00:00
Linus Torvalds
e6b5be2be4 Driver core patches for 3.19-rc1
Here's the set of driver core patches for 3.19-rc1.
 
 They are dominated by the removal of the .owner field in platform
 drivers.  They touch a lot of files, but they are "simple" changes, just
 removing a line in a structure.
 
 Other than that, a few minor driver core and debugfs changes.  There are
 some ath9k patches coming in through this tree that have been acked by
 the wireless maintainers as they relied on the debugfs changes.
 
 Everything has been in linux-next for a while.
 
 Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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Merge tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

Pull driver core update from Greg KH:
 "Here's the set of driver core patches for 3.19-rc1.

  They are dominated by the removal of the .owner field in platform
  drivers.  They touch a lot of files, but they are "simple" changes,
  just removing a line in a structure.

  Other than that, a few minor driver core and debugfs changes.  There
  are some ath9k patches coming in through this tree that have been
  acked by the wireless maintainers as they relied on the debugfs
  changes.

  Everything has been in linux-next for a while"

* tag 'driver-core-3.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (324 commits)
  Revert "ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries"
  fs: debugfs: add forward declaration for struct device type
  firmware class: Deletion of an unnecessary check before the function call "vunmap"
  firmware loader: fix hung task warning dump
  devcoredump: provide a one-way disable function
  device: Add dev_<level>_once variants
  ath: ath9k: use debugfs_create_devm_seqfile() helper for seq_file entries
  ath: use seq_file api for ath9k debugfs files
  debugfs: add helper function to create device related seq_file
  drivers/base: cacheinfo: remove noisy error boot message
  Revert "core: platform: add warning if driver has no owner"
  drivers: base: support cpu cache information interface to userspace via sysfs
  drivers: base: add cpu_device_create to support per-cpu devices
  topology: replace custom attribute macros with standard DEVICE_ATTR*
  cpumask: factor out show_cpumap into separate helper function
  driver core: Fix unbalanced device reference in drivers_probe
  driver core: fix race with userland in device_add()
  sysfs/kernfs: make read requests on pre-alloc files use the buffer.
  sysfs/kernfs: allow attributes to request write buffer be pre-allocated.
  fs: sysfs: return EGBIG on write if offset is larger than file size
  ...
2014-12-14 16:10:09 -08:00
Rafael J. Wysocki
ec83305032 spi: Replace CONFIG_PM_RUNTIME with CONFIG_PM
After commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if PM_SLEEP is
selected) PM_RUNTIME is always set if PM is set, so #ifdef blocks
depending on CONFIG_PM_RUNTIME may now be changed to depend on
CONFIG_PM.

Replace CONFIG_PM_RUNTIME with CONFIG_PM everywhere under
drivers/spi/.

Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
Acked-by: Mark Brown <broonie@kernel.org>
2014-12-13 00:41:15 +01:00
Linus Torvalds
7ef58b32f5 Devicetree changes for v3.19
Lots of activity in the devicetree code for v3.18. Most of it is related
 to getting all of the overlay support code in place, but there are other
 important things in there.
 
 There are a few trivial merge conflicts. They shouldn't give you any
 trouble.
 
 Highlights:
 - OF_RECONFIG notifiers for SPI, I2C and Platform devices. Those
   subsystems can now respond to live changes to the device tree.
 - CONFIG_OF_OVERLAY method for applying live changes to the device tree
 - Removal of the of_allnodes list. This used to be used to iterate over
   all the nodes in the device tree, but it is unnecessary because the
   same thing can be done by iterating over the list of child pointers.
   Getting rid of of_allnodes saves some memory and avoids the
   possibility of of_allnodes being sorted differently from the child
   lists.
 - Support for retrieving original DTB blob via sysfs. Needed by kexec.
 - More unittests
 - Documentation and minor bug fixes
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Merge tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux

Pull devicetree changes from Grant Likely:
 "Lots of activity in the devicetree code for v3.18.  Most of it is
  related to getting all of the overlay support code in place, but there
  are other important things in there.

  Highlights:

   - OF_RECONFIG notifiers for SPI, I2C and Platform devices.  Those
     subsystems can now respond to live changes to the device tree.

   - CONFIG_OF_OVERLAY method for applying live changes to the device
     tree

   - Removal of the of_allnodes list.  This used to be used to iterate
     over all the nodes in the device tree, but it is unnecessary
     because the same thing can be done by iterating over the list of
     child pointers.  Getting rid of of_allnodes saves some memory and
     avoids the possibility of of_allnodes being sorted differently from
     the child lists.

   - Support for retrieving original DTB blob via sysfs.  Needed by
     kexec.

   - More unittests

   - Documentation and minor bug fixes"

* tag 'devicetree-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/glikely/linux: (42 commits)
  of: Delete unnecessary check before calling "of_node_put()"
  of: Drop ->next pointer from struct device_node
  spi: Check for spi_of_notifier when CONFIG_OF_DYNAMIC=y
  of: support passing console options with stdout-path
  of: add optional options parameter to of_find_node_by_path()
  of: Add bindings for chosen node, stdout-path
  of: Remove unneeded and incorrect MODULE_DEVICE_TABLE
  ARM: dt: fix up PL011 device tree bindings
  of: base, fix of_property_read_string_helper kernel-doc
  of: remove select of non-existant OF_DEVICE config symbol
  spi/of: Add OF notifier handler
  spi/of: Create new device registration method and accessors
  i2c/of: Add OF_RECONFIG notifier handler
  i2c/of: Factor out Devicetree registration code
  of/overlay: Add overlay unittests
  of/overlay: Introduce DT overlay support
  of/reconfig: Add OF_DYNAMIC notifier for platform_bus_type
  of/reconfig: Always use the same structure for notifiers
  of/reconfig: Add debug output for OF_RECONFIG notifiers
  of/reconfig: Add empty stubs for the of_reconfig methods
  ...
2014-12-11 13:06:58 -08:00
Linus Torvalds
b859e7d13b spi: Updates for v3.19
Not a huge amount going on this release, mainly new drivers (there's a
 couple more waiting that didn't quite make the cut for this release
 too):
 
  - An interface for querying if the current transfer is the last in a
    message, allowing controllers that need special handling for the
    final transfer to use the core message parsing.
  - Support for Amlogic Meson SPIFC, Imagination Technologies SFPI, Intel
    Quark X1000 and Samsung Exynos 7 controllers.
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Merge tag 'spi-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi

Pull spi updates from Mark Brown:
 "Not a huge amount going on this release, mainly new drivers (there's a
  couple more waiting that didn't quite make the cut for this release
  too):

   - An interface for querying if the current transfer is the last in a
     message, allowing controllers that need special handling for the
     final transfer to use the core message parsing.
   - Support for Amlogic Meson SPIFC, Imagination Technologies SFPI,
     Intel Quark X1000 and Samsung Exynos 7 controllers"

* tag 'spi-v3.19' of git://git.kernel.org/pub/scm/linux/kernel/git/broonie/spi: (38 commits)
  spi/s3c64xx: Remove redundant runtime PM management
  spi: fsl-spi: remove unused variable assignment
  spi: spi-fsl-spi: Return an error code in fsl_spi_do_one_msg()
  spi: core: Do not mangle error code from kthread_run()
  spi: fsl-espi: add (un)prepare_transfer_hardware calls to save power if SPI is not in use
  spi: fsl-(e)spi: migrate to generic master queueing
  spi/txx9: Deletion of an unnecessary check before the function call "clk_disable"
  spi: cadence: Fix 3-to-8 mux mode
  spi: cadence: Init HW after reading devicetree attributes
  spi: meson: Select REGMAP_MMIO
  spi: s3c64xx: add support for exynos7 SPI controller
  spi: spi-pxa2xx: SPI support for Intel Quark X1000
  spi: meson: meson_spifc_setup_speed() can be static
  spi: spi-pxa2xx: Add helpers for regiseters' accessing
  spi: spi-mxs: Fix mapping from vmalloc-ed buffer to scatter list
  spi: atmel: introduce probe deferring
  spi: atmel: remove compat for non DT board when requesting dma chan
  spi: meson: Add support for Amlogic Meson SPIFC
  spi: meson: Add device tree bindings documentation for SPIFC
  spi: core: Add spi_transfer_is_last() helper
  ...
2014-12-11 12:03:34 -08:00
Rafael J. Wysocki
e3d857e1ae Merge branch 'pm-runtime'
* pm-runtime: (25 commits)
  i2c-omap / PM: Drop CONFIG_PM_RUNTIME from i2c-omap.c
  dmaengine / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  drivers: sh / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  e1000e / igb / PM: Eliminate CONFIG_PM_RUNTIME
  MMC / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  MFD / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  misc / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  media / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  input / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  iio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  hsi / OMAP / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  i2c-hid / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  drm / exynos / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  gpio / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  hwrandom / exynos / PM: Use CONFIG_PM in #ifdef
  block / PM: Replace CONFIG_PM_RUNTIME with CONFIG_PM
  USB / PM: Drop CONFIG_PM_RUNTIME from the USB core
  PM: Merge the SET*_RUNTIME_PM_OPS() macros
  PM / Kconfig: Do not select PM directly from Kconfig files
  PCI / PM: Drop CONFIG_PM_RUNTIME from the PCI core
  ...
2014-12-08 20:00:44 +01:00
Mark Brown
0e647037fe Merge remote-tracking branches 'spi/topic/spidev' and 'spi/topic/txx9' into spi-next 2014-12-08 12:17:20 +00:00
Mark Brown
f56be67b19 Merge remote-tracking branches 'spi/topic/mxs', 'spi/topic/pxa', 'spi/topic/rockchip', 'spi/topic/samsung' and 'spi/topic/sirf' into spi-next 2014-12-08 12:17:17 +00:00
Mark Brown
dcf695b5f3 Merge remote-tracking branches 'spi/topic/fsl-dspi', 'spi/topic/fsl-espi', 'spi/topic/gpio', 'spi/topic/img-spfi' and 'spi/topic/meson' into spi-next 2014-12-08 12:17:15 +00:00
Mark Brown
3bcfca617a Merge remote-tracking branches 'spi/topic/atmel', 'spi/topic/cadence', 'spi/topic/dw' and 'spi/topic/fsl-cpm' into spi-next 2014-12-08 12:17:12 +00:00
Mark Brown
19a0368028 Merge remote-tracking branch 'spi/topic/core' into spi-next 2014-12-08 12:17:11 +00:00
Mark Brown
c9508d4b3a Merge remote-tracking branch 'spi/fix/cadence' into spi-linus 2014-12-08 12:17:10 +00:00
Mark Brown
bc88f11baf spi/s3c64xx: Remove redundant runtime PM management
The device already asks the core to hold a runtime PM reference while it
is active so it is redundant to open code that in the driver itself.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-07 13:47:21 +00:00
Heiner Kallweit
1a7e06d260 spi: fsl-spi: remove unused variable assignment
Remove an unused variable assignment.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04 22:44:05 +00:00
Fabio Estevam
75c410884a spi: spi-fsl-spi: Return an error code in fsl_spi_do_one_msg()
Since commit c592becbe7 ("spi: fsl-(e)spi: migrate to generic master
queueing") the function fsl_spi_do_one_msg() is not void anymore, so return
an error code to avoid the following buid warning:

   drivers/spi/spi-fsl-spi.c: In function 'fsl_spi_do_one_msg':
>> drivers/spi/spi-fsl-spi.c:374:4: warning: 'return' with no value, in function returning non-void [-Wreturn-type]
       return;
       ^

Reported-by: kbuild test robot <fengguang.wu@intel.com>
Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04 22:43:56 +00:00
Jarkko Nikula
98a8f5a053 spi: core: Do not mangle error code from kthread_run()
kthread_run() could return ERR_PTR(-EINTR) from kthread_create_on_node().
Return the actual error code in spi_init_queue() instead of mangling it to
-ENOMEM.

Signed-off-by: Jarkko Nikula <jarkko.nikula@linux.intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-04 22:42:37 +00:00
Rafael J. Wysocki
6ed23b806e PM: Merge the SET*_RUNTIME_PM_OPS() macros
The SET_PM_RUNTIME_PM_OPS() and SET_RUNTIME_PM_OPS() macros are
identical except that one of them is not empty for CONFIG_PM set,
while the other one is not empty for CONFIG_PM_RUNTIME set,
respectively.

However, after commit b2b49ccbdd (PM: Kconfig: Set PM_RUNTIME if
PM_SLEEP is selected) PM_RUNTIME is always set if PM is set, so one
of these macros is now redundant.

For this reason, replace SET_PM_RUNTIME_PM_OPS() with
SET_RUNTIME_PM_OPS() everywhere and redefine the SET_PM_RUNTIME_PM_OPS
symbol as SET_RUNTIME_PM_OPS in case new code is starting to use the
macro being removed here.

Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: Kevin Hilman <khilman@linaro.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2014-12-04 00:51:30 +01:00
Fabio Estevam
5267720e75 spi: Check for spi_of_notifier when CONFIG_OF_DYNAMIC=y
Since commit ce79d54ae4 ("spi/of: Add OF notifier handler") the
following warning is seen on a imx53 system that has CONFIG_OF_DYNAMIC=n:

[    0.048119] ------------[ cut here ]------------
[    0.048146] WARNING: CPU: 0 PID: 1 at drivers/spi/spi.c:2419 spi_init+0x60/0xa8()
[    0.048158] Modules linked in:
[    0.048183] CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.18.0-rc6-next-20141126-00003-g9388e85 #2080
[    0.048193] Hardware name: Freescale i.MX53 (Device Tree Support)
[    0.048203] Backtrace:
[    0.048235] [<80011f74>] (dump_backtrace) from [<80012110>] (show_stack+0x18/0x1c)
[    0.048246]  r6:00000973 r5:00000000 r4:00000000 r3:00000000
[    0.048284] [<800120f8>] (show_stack) from [<806b3ad8>] (dump_stack+0x88/0xa4)
[    0.048312] [<806b3a50>] (dump_stack) from [<8002a55c>] (warn_slowpath_common+0x80/0xbc)
[    0.048320]  r5:8096cfcc r4:00000000
[    0.048343] [<8002a4dc>] (warn_slowpath_common) from [<8002a5bc>] (warn_slowpath_null+0x24/0x2c)
[    0.048354]  r8:8096cf6c r7:809355ec r6:ddcd7c00 r5:812029e4 r4:00000000
[    0.048389] [<8002a598>] (warn_slowpath_null) from [<8096cfcc>] (spi_init+0x60/0xa8)
[    0.048405] [<8096cf6c>] (spi_init) from [<80008a7c>] (do_one_initcall+0x88/0x1e0)
[    0.048415]  r5:8099e018 r4:8099e018
[    0.048438] [<800089f4>] (do_one_initcall) from [<80935e38>] (kernel_init_freeable+0x110/0x1e0)
[    0.048448]  r10:80980700 r9:809806e4 r8:000000cc r7:809355ec r6:809f8940 r5:00000002
[    0.048478]  r4:8098d744
[    0.048508] [<80935d28>] (kernel_init_freeable) from [<806ae574>] (kernel_init+0x10/0xf4)
[    0.048517]  r10:00000000 r9:00000000 r8:00000000 r7:00000000 r6:00000000 r5:806ae564
[    0.048547]  r4:00000000
[    0.048565] [<806ae564>] (kernel_init) from [<8000ed68>] (ret_from_fork+0x14/0x2c)
[    0.048574]  r4:00000000 r3:00000000
[    0.048616] ---[ end trace 405a65d177dae4fd ]---

Only check of_reconfig_notifier_register() in the CONFIG_OF_DYNAMIC=y case,
as intended by commit ce79d54ae4.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
2014-12-03 23:12:39 +00:00
Heiner Kallweit
75506d0e00 spi: fsl-espi: add (un)prepare_transfer_hardware calls to save power if SPI is not in use
Use (un)prepare_transfer_hardware calls to set fsl-espi to
low-power idle if not in use. Reference manual states:

"The eSPI is in a idle state and consumes minimal power.
The eSPI BRG is not functioning and the input clock is disabled"

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-03 13:05:47 +00:00
Heiner Kallweit
c592becbe7 spi: fsl-(e)spi: migrate to generic master queueing
Migrates the fsl-(e)spi driver to use the generic master queuing.
Avoids the "master is unqueued, this is deprecated" warning.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-03 13:05:47 +00:00
Markus Elfring
7d57cd8946 spi/txx9: Deletion of an unnecessary check before the function call "clk_disable"
The clk_disable() function tests whether its argument is NULL and then
returns immediately. Thus the test around the call is not needed.

This issue was detected by using the Coccinelle software.

Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-12-01 19:25:14 +00:00
Lars-Peter Clausen
ee0ebe8100 spi: cadence: Fix 3-to-8 mux mode
In 3-to-8 mux mode for the CS pins we need to set the PERI_SEL bit in the
control register. Currently the driver never sets this bit even when
configured for 3-to-8 mux mode. This patch adds code which sets the bit
during device initialization when necessary.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Harini Katakam <harinik@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-28 11:42:11 +00:00
Paul Cercueil
3cc291061c spi: cadence: Init HW after reading devicetree attributes
This will make it possible to use the settings specified in the devicetree
to configure the hardware.

Signed-off-by: Paul Cercueil <paul.cercueil@analog.com>
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Reviewed-by: Michal Simek <michal.simek@xilinx.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-28 11:41:13 +00:00
Beniamino Galvani
1327ecd47f spi: meson: Select REGMAP_MMIO
The Meson SPIFC driver uses regmap mmio functions and so it must
select REGMAP_MMIO to avoid the following build error:

spi-meson-spifc.c: undefined reference to `devm_regmap_init_mmio_clk'

Reported-by: Jim Davis <jim.epost@gmail.com>
Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-27 11:00:16 +00:00
Mark Brown
ec058615f1 Merge remote-tracking branches 'spi/fix/dw' and 'spi/fix/sirf' into spi-linus 2014-11-26 19:05:25 +00:00
Mark Brown
13616c7133 Merge remote-tracking branch 'spi/fix/dma' into spi-linus 2014-11-26 19:05:25 +00:00
Padmavathi Venna
bf77cba95f spi: s3c64xx: add support for exynos7 SPI controller
Exynos7 SPI controller supports only the auto Selection of
CS toggle mode and Exynos7 SoC includes six SPI controllers.
Add support for these changes in Exynos7 SPI controller driver.

Signed-off-by: Padmavathi Venna <padma.v@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-26 19:00:34 +00:00
Weike Chen
e5262d0568 spi: spi-pxa2xx: SPI support for Intel Quark X1000
There are two SPI controllers exported by PCI subsystem for Intel Quark X1000.
The SPI memory mapped I/O registers supported by Quark are different from
the current implementation, and Quark only supports the registers of 'SSCR0',
'SSCR1', 'SSSR', 'SSDR', and 'DDS_RATE'. This patch is to enable the SPI for
Intel Quark X1000.

This piece of work is derived from Dan O'Donovan's initial work for Intel Quark
X1000 SPI enabling.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Weike Chen <alvin.chen@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-26 18:07:45 +00:00
Pantelis Antoniou
ce79d54ae4 spi/of: Add OF notifier handler
Add OF notifier handler needed for creating/destroying spi devices
according to dynamic runtime changes in the DT live tree. This code is
enabled when CONFIG_OF_DYNAMIC is selected.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: <linux-spi@vger.kernel.org>
2014-11-25 15:36:24 +00:00
Pantelis Antoniou
aff5e3f89a spi/of: Create new device registration method and accessors
Dynamically inserting spi device nodes requires the use of a single
device registration method. Refactor the existing
of_register_spi_devices() to split out the core functionality for a
single device into a separate function; of_register_spi_device(). This
function will be used by the OF_DYNAMIC overlay code to make live
modifications to the tree.

Methods to lookup a device/master using a device node are added
as well, of_find_spi_master_by_node() & of_find_spi_device_by_node().

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[grant.likely] Split patch into two pieces for clarity
Signed-off-by: Grant Likely <grant.likely@linaro.org>
Reviewed-by: Mark Brown <broonie@kernel.org>
Cc: <linux-spi@vger.kernel.org>
2014-11-25 15:35:43 +00:00
kbuild test robot
008c2a2ef0 spi: meson: meson_spifc_setup_speed() can be static
drivers/spi/spi-meson-spifc.c:171:6: sparse: symbol 'meson_spifc_setup_speed' was not declared. Should it be static?

Signed-off-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-25 12:08:24 +00:00
Weike Chen
4fdb2424cc spi: spi-pxa2xx: Add helpers for regiseters' accessing
There are several registers for SPI, and the registers of 'SSCR0' and 'SSCR1'
are accessed frequently. This path is to introduce helper functions to
simplify the accessing of 'SSCR0' and 'SSCR1'.

Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Weike Chen <alvin.chen@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 19:00:01 +00:00
Charles Keepax
9e8987acf0 spi: spi-mxs: Fix mapping from vmalloc-ed buffer to scatter list
We can only use page_address on memory that has been mapped using kmap,
when the buffer passed to the SPI has been allocated by vmalloc the page
has not necessarily been mapped through kmap. This means sometimes
page_address will return NULL causing the pointer we pass to sg_init_one
to be invalid. Currently, this issue doesn't show up on the MXS
architecture as the defconfig defines CONFIG_HIGHMEM=n which means all
pages are mapped. For the sake of robustness though it is best to
correct the issue.

As we only call page_address so that we can pass a virtual address to
sg_init_one which will eventually call virt_to_page on it, fix this
by calling sg_set_page directly rather then relying on the sg_init_one
helper.

Note this patch is only build tested as I don't have an MXS system to
test on.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:58:08 +00:00
Ludovic Desroches
5e9af37e46 spi: atmel: introduce probe deferring
Return probe defer if requesting a dma channel without a dma controller
probed.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:57:37 +00:00
Ludovic Desroches
7758e39069 spi: atmel: remove compat for non DT board when requesting dma chan
All boards with a dma controller have DT support so using
dma_request_slave_channel_compat is no more needed.

Signed-off-by: Ludovic Desroches <ludovic.desroches@atmel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:57:37 +00:00
Beniamino Galvani
c3e4bc5434 spi: meson: Add support for Amlogic Meson SPIFC
This is a driver for the Amlogic Meson SPIFC (SPI flash controller),
which is one of the two SPI controllers available on the SoC. It
doesn't support DMA and has a 64-byte unified transmit/receive buffer.

The device is optimized for interfacing with SPI NOR memories and
allows the execution of standard operations such as read, page
program, sector erase, etc. in a simplified way, toggling a bit in a
dedicated register. The driver doesn't use those predefined commands
and relies only on custom transfers.

Signed-off-by: Beniamino Galvani <b.galvani@gmail.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-24 18:54:48 +00:00
Christophe Leroy
194ed900ca spi: fsl-spi: Don't use cpm_command on CPM1
On CPM1, when the SPI parameter RAM is relocated to somewhere else than the
default location, in accordance with freescale documentation
(refer micropatch SPI application note EB662), init RX/TX params command shall
not be used because it doesn't take into account the new location, and
overwrites data that is in original location of SPI param ram at addresses
SCC2 param base +  (u32*)0x88 (u16*)0x90 (u32*)0x98 (u16*)0xA0, hence breaking
activity on SCC2 if SCC2 is used in a mode like QMC for instance.

Therefore, the action shall be done manually as described by freescale and as
was already partly done by the driver.

Reported-by: Patrick Vasseur <patrick.vasseur@c-s.fr>
Signed-off-by: Christophe Leroy <christophe.leroy@c-s.fr>
Tested-by: Patrick Vasseur <patrick.vasseur@c-s.fr>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-21 18:12:42 +00:00
Qipan Li
8509c55fcb spi: sirf: reset SPI controller in init stage
in SPI boot mode, romcode uses SPI controller to fetch data from NOR
flash. Here we need to reset the hardware IP to restore its state.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-21 18:11:21 +00:00
Qipan Li
fcc50e5cd2 spi: sirf: assign spi_master's max_speed_hz member
if spi device has no frequency, spi core will setup the default frequency
to max_speed_hz of spi_master according to
int spi_setup(struct spi_device *spi)
{
	...
        if (!spi->max_speed_hz)
                spi->max_speed_hz = spi->master->max_speed_hz;
	...
}
this patch moves CSR SiRFSoC SPI frequency set to follow SPI core behaviour.

Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-18 14:45:02 +00:00
Qipan Li
9c4b19a07d spi: sirf: fix word width configuration
commit 8c328a262f ("spi: sirf: Avoid duplicate code in various
bits_per_word cases") is wrong in setting data width register of
fifo is not right, it should use sspi->word_width >> 1 to set
related bits. According to hardware spec, the mapping between
register value and data width:
0 - byte
1 - WORD
2 - DWORD

Fixes: 8c328a262f ("spi: sirf: Avoid duplicate code in various bits_per_word cases") is wrong in setting data width register of
Signed-off-by: Qipan Li <Qipan.Li@csr.com>
Signed-off-by: Barry Song <Baohua.Song@csr.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-18 14:43:22 +00:00
Andrew Bresticker
deba25800a spi: Add driver for IMG SPFI controller
Add support for the Synchronous Peripheral Flash Interface (SPFI) master
controller found on IMG SoCs.  The SPFI controller supports 5 chip-select
lines and single/dual/quad mode SPI transfers.

Signed-off-by: Andrew Bresticker <abrestic@chromium.org>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-17 13:31:08 +00:00
Charles Keepax
c1aefbdd05 spi: Fix mapping from vmalloc-ed buffer to scatter list
We can only use page_address on memory that has been mapped using kmap,
when the buffer passed to the SPI has been allocated by vmalloc the page
has not necessarily been mapped through kmap. This means sometimes
page_address will return NULL causing the pointer we pass to sg_set_buf
to be invalid.

As we only call page_address so that we can pass a virtual address to
sg_set_buf which will then immediately call virt_to_page on it, fix this
by calling sg_set_page directly rather then relying on the sg_set_buf
helper.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
Cc: stable@vger.kernel.org
2014-11-17 10:40:10 +00:00
Laurentiu Palcu
dfcc2e3549 spi/rockchip: remove redundant call to spi_master_put()
The call to spi_master_put() in rockchip_spi_remove() is redundant since
the master is registered using devm_. This patch removes it.

Signed-off-by: Laurentiu Palcu <laurentiu.palcu@intel.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-12 15:04:18 +00:00
Mark Brown
9169051617 spi: spidev: Don't mangle max_speed_hz in underlying spi device
Currently spidev allows callers to set the default speed by overriding the
max_speed_hz in the underlying device. This achieves the immediate goal but
is not what devices expect and can easily lead to userspace trying to set
unsupported speeds and succeeding, apart from anything else drivers can't
set a limit on the speed using max_speed_hz as they'd expect and any other
devices on the bus will be affected.

Instead store the default speed in the spidev struct and fill this in on
each transfer.

Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-11 18:01:28 +00:00
Fabio Estevam
617100c271 spi: spi-mxs: Register the irq with the device name
Instead of registering the irq name with the driver name, it's better to pass
the device name so that we have a more explicit indication as to what spi
instance the irq is related:

$ cat /proc/interrupts
           CPU0
...
 27:          0         -  98  80014000.ssp

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2014-11-10 19:37:30 +00:00