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  1. 30 3月, 2013 1 次提交
  3. 27 11月, 2012 1 次提交
  5. 21 11月, 2012 1 次提交
    • R
      ACPI / platform: Initialize ACPI handles of platform devices in advance · 863f9f30
      由 Rafael J. Wysocki 提交于 
      The current platform device creation and registration code in
acpi_create_platform_device() is quite convoluted.  This function
takes an ACPI device node as an argument and eventually calls
platform_device_register_resndata() to create and register a
platform device object on the basis of the information contained
in that code.  However, it doesn't associate the new platform
device with the ACPI node directly, but instead it relies on
acpi_platform_notify(), called from within device_add(), to find
that ACPI node again with the help of acpi_platform_find_device()
and acpi_platform_match() and then attach the new platform device
to it.  This causes an additional ACPI namespace walk to happen and
is clearly suboptimal.

Use the observation that it is now possible to initialize the ACPI
handle of a device before calling device_add() for it to make this
code more straightforward.  Namely, add a new field to struct
platform_device_info allowing us to pass the ACPI handle of interest
to platform_device_register_full(), which will then use it to
initialize the new device's ACPI handle before registering it.
This will cause acpi_platform_notify() to use the ACPI handle from
the device structure directly instead of using the .find_device()
routine provided by the device's bus type.  In consequence,
acpi_platform_bus, acpi_platform_find_device(), and
acpi_platform_match() are not necessary any more, so remove them.
Signed-off-by: NRafael J. Wysocki <rafael.j.wysocki@intel.com>
Reviewed-by: NMika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      863f9f30
  7. 16 11月, 2012 1 次提交
  9. 15 11月, 2012 1 次提交
  11. 10 11月, 2012 1 次提交
  13. 31 10月, 2012 1 次提交
  15. 07 9月, 2012 1 次提交
  17. 04 9月, 2012 1 次提交
    • R
      PM / Runtime: Allow helpers to be called by early platform drivers · bed2b42d
      由 Rafael J. Wysocki 提交于 
      Runtime PM helper functions, like pm_runtime_get_sync(), cannot be
called by early platform device drivers, because the devices' power
management locks are not initialized at that time.  This is quite
inconvenient, so modify early_platform_add_devices() to initialize
the devices power management locks as appropriate and make sure that
they won't be initialized more than once if an early platform
device is going to be used as a regular one later.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
      bed2b42d
  19. 17 8月, 2012 1 次提交
    • J
      platform: Add support for automatic device IDs · 689ae231
      由 Jean Delvare 提交于 
      Right now we have support for explicit platform device IDs, as well as
ID-less platform devices when a given device type can only have one
instance. However there are cases where multiple instances of a device
type can exist, and their IDs aren't (and can't be) known in advance
and do not matter. In that case we need automatic device IDs to avoid
device name collisions.

I am using magic ID value -2 (PLATFORM_DEVID_AUTO) for this, similar
to -1 for ID-less devices. The automatically allocated device IDs are
global (to avoid an additional per-driver cost.) We keep note that the
ID was automatically allocated so that it can be freed later.

Note that we also restore the ID to PLATFORM_DEVID_AUTO on error and
device deletion, to avoid avoid unexpected behavior on retry. I don't
really expect retries on platform device addition, but better safe
than sorry.
Signed-off-by: NJean Delvare <khali@linux-fr.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
      689ae231
  21. 02 2月, 2012 1 次提交
    • G
      drivercore: Output common devicetree information in uevent · 07d57a32
      由 Grant Likely 提交于 
      When userspace needs to find a specific device, it currently isn't easy to
resolve a /sys/devices/ path from a specific device tree node.  Nor is it
easy to obtain the compatible list for devices.

This patch generalizes the code that inserts OF_* values into the uevent
device attribute so that any device that is attached to an OF node will
have that information exported to userspace.  Without this patch only
platform devices and some powerpc-specific busses have access to this
data.

The original function also creates a MODALIAS property for the compatible
list, but that code has not been generalized into the common case because
it has the potential to break module loading on a lot of bus types.  Bus
types are still responsible for their own MODALIAS properties.

Boot tested on ARM and compile tested on PowerPC and SPARC.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Tobias Klauser <tklauser@distanz.ch>
Cc: Frederic Lambert <frdrc66@gmail.com>
Cc: Rob Herring <rob.herring@calxeda.com>
Cc: Mark Brown <broonie@sirena.org.uk>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      07d57a32
  23. 22 12月, 2011 1 次提交
  25. 10 12月, 2011 1 次提交
  27. 27 8月, 2011 1 次提交
  29. 23 8月, 2011 1 次提交
  31. 09 8月, 2011 1 次提交
  33. 08 7月, 2011 1 次提交
  35. 08 6月, 2011 1 次提交
  37. 17 5月, 2011 1 次提交
  39. 29 4月, 2011 2 次提交
  41. 23 4月, 2011 4 次提交
  43. 12 4月, 2011 2 次提交
    • S
      mfd: Fetch cell pointer from platform_device->mfd_cell · e710d7d5
      由 Samuel Ortiz 提交于 
      In order for MFD drivers to fetch their cell pointer but also their
platform data one, an mfd cell pointer is added to the platform_device
structure.
That allows all MFD sub devices drivers to be MFD agnostic, unless
they really need to access their MFD cell data. Most of them don't,
especially the ones for IPs used by both MFD and non MFD SoCs.

Cc: Grant Likely <grant.likely@secretlab.ca>
Acked-by: NGreg KH <gregkh@suse.de>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>
      e710d7d5
    • R
      PM / Hibernate: Introduce CONFIG_HIBERNATE_CALLBACKS · 1f112cee
      由 Rafael J. Wysocki 提交于 
      Xen save/restore is going to use hibernate device callbacks for
quiescing devices and putting them back to normal operations and it
would need to select CONFIG_HIBERNATION for this purpose.  However,
that also would cause the hibernate interfaces for user space to be
enabled, which might confuse user space, because the Xen kernels
don't support hibernation.  Moreover, it would be wasteful, as it
would make the Xen kernels include a substantial amount of code that
they would never use.

To address this issue introduce new power management Kconfig option
CONFIG_HIBERNATE_CALLBACKS, such that it will only select the code
that is necessary for the hibernate device callbacks to work and make
CONFIG_HIBERNATION select it.  Then, Xen save/restore will be able to
select CONFIG_HIBERNATE_CALLBACKS without dragging the entire
hibernate code along with it.
Signed-off-by: NRafael J. Wysocki <rjw@sisk.pl>
Tested-by: NShriram Rajagopalan <rshriram@cs.ubc.ca>
      1f112cee
  45. 23 10月, 2010 4 次提交
  47. 22 10月, 2010 1 次提交
    • G
      of/device: Rework to use common platform_device_alloc() for allocating devices · 7096d042
      由 Grant Likely 提交于 
      The current code allocates and manages platform_devices created from
the device tree manually.  It also uses an unsafe shortcut for
allocating the platform_device and the resource table at the same
time. (which I added in the last rework; sorry).

This patch refactors the code to use platform_device_alloc() for
allocating new devices.  This reduces the amount of custom code
implemented by of_platform, eliminates the unsafe alloc trick, and has
the side benefit of letting the platform_bus code manage freeing the
device data and resources when the device is freed.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Greg Kroah-Hartman <gregkh@suse.de>
Cc: "David S. Miller" <davem@davemloft.net>
Cc: Michal Simek <monstr@monstr.eu>
      7096d042
  49. 06 8月, 2010 3 次提交
  51. 24 7月, 2010 2 次提交
    • G
      of: Merge of_platform_bus_type with platform_bus_type · eca39301
      由 Grant Likely 提交于 
      of_platform_bus was being used in the same manner as the platform_bus.
The only difference being that of_platform_bus devices are generated
from data in the device tree, and platform_bus devices are usually
statically allocated in platform code.  Having them separate causes
the problem of device drivers having to be registered twice if it
was possible for the same device to appear on either bus.

This patch removes of_platform_bus_type and registers all of_platform
bus devices and drivers on the platform bus instead.  A previous patch
made the of_device structure an alias for the platform_device structure,
and a shim is used to adapt of_platform_drivers to the platform bus.

After all of of_platform_bus drivers are converted to be normal platform
drivers, the shim code can be removed.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NDavid S. Miller <davem@davemloft.net>
      eca39301
    • G
      drivercore/of: Add OF style matching to platform bus · 05212157
      由 Grant Likely 提交于 
      As part of the merge between platform bus and of_platform bus, add the
ability to do of-style matching to the platform bus.
Signed-off-by: NGrant Likely <grant.likely@secretlab.ca>
Acked-by: NGreg Kroah-Hartman <gregkh@suse.de>
CC: Michal Simek <monstr@monstr.eu>
CC: Grant Likely <grant.likely@secretlab.ca>
CC: Benjamin Herrenschmidt <benh@kernel.crashing.org>
CC: Stephen Rothwell <sfr@canb.auug.org.au>
CC: linux-kernel@vger.kernel.org
CC: microblaze-uclinux@itee.uq.edu.au
CC: linuxppc-dev@ozlabs.org
CC: devicetree-discuss@lists.ozlabs.org
      05212157
  53. 22 5月, 2010 1 次提交
  55. 18 5月, 2010 1 次提交
  57. 13 5月, 2010 1 次提交
    • P
      driver core: Early dev_name() depends on slab_is_available(). · 06fe53be
      由 Paul Mundt 提交于 
      The early dev_name() setup needs to do an allocation which can only be
satisfied under slab_is_available() conditions. Some of the early
platform drivers may be initialized before this point, and those still
need to contend themselves with an empty dev_name.

This fixes up a regression with the SH earlyprintk which was bailing out
prior to hitting the early probe path due to not being able to satisfy
the early allocation. Other early platform drivers (such as the early
timers) that need to match the dev name are sufficiently late that
allocations are already possible.
Signed-off-by: NPaul Mundt <lethal@linux-sh.org>
      06fe53be