Commit Graph

23 Commits

Author SHA1 Message Date
Maxime Ripard deb387d4af of: property: Document that of_graph_get_endpoint_by_regs needs of_node_put
The node returned by of_graph_get_endpoint_by_regs has a reference taken,
and we need to put that reference back when done with the node.

However, the documentation for that node doesn't mention it, so let's make
sure it does.

Signed-off-by: Maxime Ripard <maxime.ripard@bootlin.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2019-04-10 09:03:03 -05:00
Julia Lawall 28b170e88b OF: properties: add missing of_node_put
Add an of_node_put when the result of of_graph_get_remote_port_parent is
not available.

The semantic match that finds this problem is as follows
(http://coccinelle.lip6.fr):

// <smpl>
@r exists@
local idexpression e;
expression x;
@@
e = of_graph_get_remote_port_parent(...);
... when != x = e
    when != true e == NULL
    when != of_node_put(e)
    when != of_fwnode_handle(e)
(
return e;
|
*return ...;
)
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Cc: stable@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
2019-01-16 12:49:53 -06:00
Rob Herring b3e46d1a05 of: Use of_node_name_eq for node name comparisons
Convert string compares of DT node names to use of_node_name_eq helper
instead. This removes direct access to the node name pointer.

Cc: Frank Rowand <frowand.list@gmail.com>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Cc: devicetree@vger.kernel.org
Signed-off-by: Rob Herring <robh@kernel.org>
2018-12-05 14:45:13 -06:00
Andy Shevchenko 67dcc26d20 device property: Constify device_get_match_data()
Constify device_get_match_data() as OF and ACPI variants return
constant value.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2018-02-12 10:41:11 +01:00
Linus Torvalds 2bed26606b DeviceTree updates for 4.16:
- Convert to use memblock_virt_alloc in DT code which supports bootmem
   arches. With this we can remove the arch specific
   early_init_dt_alloc_memory_arch() functions.
 
 - Enable running the DT unittests on UML
 
 - Use SPDX license tags on DT files
 
 - Fix early FDT kconfig ifdef logic
 
 - Clean-up unittest Makefile
 
 - Fix function comment for of_irq_parse_raw
 
 - Add missing documentation for linux,initrd-{start,end} properties
 
 - Clean-up of binding examples using uppercase hex
 
 - Add trivial devices W83773G and Infineon TLV493D-A1B6
 
 - Add missing STM32 SoC bindings
 
 - Various small binding doc fixes
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Merge tag 'devicetree-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:

 - Convert to use memblock_virt_alloc in DT code which supports
   bootmem arches. With this we can remove the arch specific
   early_init_dt_alloc_memory_arch() functions.

 - Enable running the DT unittests on UML

 - Use SPDX license tags on DT files

 - Fix early FDT kconfig ifdef logic

 - Clean-up unittest Makefile

 - Fix function comment for of_irq_parse_raw

 - Add missing documentation for linux,initrd-{start,end} properties

 - Clean-up of binding examples using uppercase hex

 - Add trivial devices W83773G and Infineon TLV493D-A1B6

 - Add missing STM32 SoC bindings

 - Various small binding doc fixes

* tag 'devicetree-for-4.16' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (23 commits)
  xtensa: remove arch specific early DT functions
  x86: remove arch specific early_init_dt_alloc_memory_arch
  nios2: remove arch specific early_init_dt_alloc_memory_arch
  mips: remove arch specific early_init_dt_alloc_memory_arch
  metag: remove arch specific early DT functions
  cris: remove arch specific early DT functions
  libfdt: remove unnecessary include directive from <linux/libfdt.h>
  of: unittest: refactor Makefile
  of/fdt: use memblock_virt_alloc for early alloc
  of: Use SPDX license tag for DT files
  of/fdt: Fix #ifdef dependency of early flattree declarations
  dt-bindings: h8300 clocksource: correct spelling of pulse
  dt-bindings: imx6q-pcie: Add required property for i.MX6SX
  mmc: Don't reference Linux-specific OF_GPIO_ACTIVE_LOW flag in DT binding
  dt-bindings: Use lower case hex in unit-addresses
  dt-bindings: display: panel: Fix compatible string for Toshiba LT089AC29000
  dt-bindings: Add Infineon TLV493D-A1B6
  dt-bindings: mailbox: ti,message-manager: Fix interrupt name error
  dt-bindings: chosen: Document linux,initrd-{start,end}
  dt-bindings: arm: document supported STM32 SoC family
  ...
2018-02-01 10:57:45 -08:00
Rob Herring af6074fc9a of: Use SPDX license tag for DT files
Convert remaining DT files to use SPDX-License-Identifier tags.

Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
Reviewed-by: Frank Rowand <frank.rowand@sony.com>
Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2018-01-08 08:22:45 -06:00
Sinan Kaya 1c2c82ea28 OF: properties: Implement get_match_data() callback
Now that we have a get_match_data() callback as part of the firmware node,
implement the OF specific piece for it.

Signed-off-by: Sinan Kaya <okaya@codeaurora.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
2017-12-13 14:10:58 +05:30
Sakari Ailus cf89a31ca5 device property: Make fwnode_handle_get() return the fwnode
The fwnode_handle_get() function is used to obtain a reference to an
fwnode. A common usage pattern for the OF equivalent of the function is:

	mynode = of_node_get(node);

Similarly make fwnode_handle_get() return the fwnode to which the
reference was obtained.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-11-09 00:17:22 +01:00
Niklas Söderlund 3314c6bdd2 device property: preserve usecount for node passed to of_fwnode_graph_get_port_parent()
Using CONFIG_OF_DYNAMIC=y uncovered an imbalance in the usecount of the
node being passed to of_fwnode_graph_get_port_parent(). Preserve the
usecount by using of_get_parent() instead of of_get_next_parent() which
don't decrement the usecount of the node passed to it.

Fixes: 3b27d00e7b ("device property: Move fwnode graph ops to firmware specific locations")
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-10-12 12:26:14 -05:00
Linus Torvalds 74fee4e88f DeviceTree updates for 4.14:
- Convert more DT code to use of_property_read_* API.
 
 - Improve DT overlay support when adding multiple overlays.
 
 - Convert printk's to %pOF format specifiers. Most went via subsystem
   trees, but picked up the remaining orphans.
 
 - Correct unittests to use preferred "okay" for "status" property value.
 
 - Add a KASLR seed property.
 
 - Vendor prefixes for Mellanox, Theobroma System, Adaptrum, Moxa.
 
 - Fix modalias buffer handling.
 
 - Clean-up of include paths for building dtbs.
 
 - Add bindings for amc6821, isl1208, tsl2x7x, srf02, and srf10 devices.
 
 - Add nvmem bindings for MediaTek MT7623 and MT7622 SoC.
 
 - Add compatible string for Allwinner H5 Mali-450 GPU.
 
 - Fix links to old OpenFirmware docs with new mirror on devicetree.org.
 
 - Remove status property from binding doc examples.
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Merge tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux

Pull DeviceTree updates from Rob Herring:
 "There's a few orphans in the conversion to %pOF printf specifiers
  included here that no one else picked up.

  Summary:

   - Convert more DT code to use of_property_read_* API.

   - Improve DT overlay support when adding multiple overlays

   - Convert printk's to %pOF format specifiers. Most went via subsystem
     trees, but picked up the remaining orphans

   - Correct unittests to use preferred "okay" for "status" property
     value

   - Add a KASLR seed property

   - Vendor prefixes for Mellanox, Theobroma System, Adaptrum, Moxa

   - Fix modalias buffer handling

   - Clean-up of include paths for building dtbs

   - Add bindings for amc6821, isl1208, tsl2x7x, srf02, and srf10
     devices

   - Add nvmem bindings for MediaTek MT7623 and MT7622 SoC

   - Add compatible string for Allwinner H5 Mali-450 GPU

   - Fix links to old OpenFirmware docs with new mirror on
     devicetree.org

   - Remove status property from binding doc examples"

* tag 'devicetree-for-4.14' of git://git.kernel.org/pub/scm/linux/kernel/git/robh/linux: (45 commits)
  devicetree: Adjust status "ok" -> "okay" under drivers/of/
  dt-bindings: Remove "status" from examples
  dt-bindings: pinctrl: sh-pfc: Use generic node name
  dt-bindings: Add vendor Mellanox
  dt-binding: net/phy: fix interrupts description
  virt: Convert to using %pOF instead of full_name
  macintosh: Convert to using %pOF instead of full_name
  ide: pmac: Convert to using %pOF instead of full_name
  microblaze: Convert to using %pOF instead of full_name
  dt-bindings: usb: musb: Grammar s/the/to/, s/is/are/
  of: Use PLATFORM_DEVID_NONE definition
  of/device: Fix of_device_get_modalias() buffer handling
  of/device: Prevent buffer overflow in of_device_modalias()
  dt-bindings: add amc6821, isl1208 trivial bindings
  dt-bindings: add vendor prefix for Theobroma Systems
  of: search scripts/dtc/include-prefixes path for both CPP and DTC
  of: remove arch/$(SRCARCH)/boot/dts from include search path for CPP
  of: remove drivers/of/testcase-data from include search path for CPP
  of: return of_get_cpu_node from of_cpu_device_node_get if CPUs are not registered
  iio: srf08: add device tree binding for srf02 and srf10
  ...
2017-09-07 14:43:33 -07:00
Linus Torvalds e7d0c41ecc Device properties framework updates for v4.14-rc1
- Introduce fwnode operations for all of the separate types of
    "firmware nodes" that can be handled by the device properties
    framework and drop the type field from struct fwnode_handle
    (Sakari Ailus, Arnd Bergmann).
 
  - Make the device properties framework use const fwnode arguments
    where possible (Sakari Ailus).
 
  - Add a helper for the consolidated handling of node references
    to the device properties framework (Sakari Ailus).
 
  - Switch over the ACPI part of the device properties framework
    to the new UUID API (Andy Shevchenko).
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Merge tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework updates from Rafael Wysocki:
 "These introduce fwnode operations for all of the separate types of
  'firmware nodes' that can be handled by the device properties
  framework, make the framework use const fwnode arguments all over, add
  a helper for the consolidated handling of node references and switch
  over the framework to the new UUID API.

  Specifics:

   - Introduce fwnode operations for all of the separate types of
     'firmware nodes' that can be handled by the device properties
     framework and drop the type field from struct fwnode_handle (Sakari
     Ailus, Arnd Bergmann).

   - Make the device properties framework use const fwnode arguments
     where possible (Sakari Ailus).

   - Add a helper for the consolidated handling of node references to
     the device properties framework (Sakari Ailus).

   - Switch over the ACPI part of the device properties framework to the
     new UUID API (Andy Shevchenko)"

* tag 'devprop-4.14-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  ACPI: device property: Switch to use new generic UUID API
  device property: export irqchip_fwnode_ops
  device property: Introduce fwnode_property_get_reference_args
  device property: Constify fwnode property API
  device property: Constify argument to pset fwnode backend
  ACPI: Constify internal fwnode arguments
  ACPI: Constify acpi_bus helper functions, switch to macros
  ACPI: Prepare for constifying acpi_get_next_subnode() fwnode argument
  device property: Get rid of struct fwnode_handle type field
  ACPI: Use IS_ERR_OR_NULL() instead of non-NULL check in is_acpi_data_node()
2017-09-05 12:50:00 -07:00
Kuninori Morimoto 358155ede4 device property: use of_graph_get_remote_endpoint() for of_fwnode
Now, we can use of_graph_get_remote_endpoint(). Let's use it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-08-14 16:10:33 -05:00
Tony Lindgren c0a480d1ac device property: Fix usecount for of_graph_get_port_parent()
Fix inconsistent use of of_graph_get_port_parent() where
asoc_simple_card_parse_graph_dai() does of_node_get() before
calling it while other callers do not. We can fix this by
not trashing the node passed to of_graph_get_port_parent().

Let's also make sure the callers have correct refcounts and remove
related incorrect of_node_put() calls for of_for_each_phandle
as that's done by of_phandle_iterator_next() except when
we break out of the loop early.

Let's fix both issues with a single patch to avoid kobject
refcounts getting messed up more if two patches are merged
separately.

Otherwise strange issues can happen caused by memory corruption
caused by too many kobject_del() calls such as:

BUG: sleeping function called from invalid context at
kernel/locking/mutex.c:747
...
(___might_sleep)
(__mutex_lock)
(mutex_lock_nested)
(kernfs_remove)
(kobject_del)
(kobject_put)
(of_get_next_parent)
(of_graph_get_port_parent)
(asoc_simple_card_parse_graph_dai [snd_soc_simple_card_utils])
(asoc_graph_card_probe [snd_soc_audio_graph_card])

Fixes: 0ef472a973 ("of_graph: add of_graph_get_port_parent()")
Fixes: 2692c1c63c ("ASoC: add audio-graph-card support")
Fixes: 1689333f83 ("ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai()")
Signed-off-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Tested-by: Antonio Borneo <borneo.antonio@gmail.com>
Tested-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2017-08-01 15:15:42 +01:00
Sakari Ailus 3e3119d308 device property: Introduce fwnode_property_get_reference_args
The new fwnode_property_get_reference_args() interface amends the fwnode
property API with the functionality of both of_parse_phandle_with_args()
and __acpi_node_get_property_reference().

The semantics is slightly different: the cells property is ignored on ACPI
as the number of arguments can be explicitly obtained from the firmware
interface.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-22 00:04:51 +02:00
Sakari Ailus 37ba983cfb device property: Constify fwnode property API
Make fwnode arguments to the fwnode property API const.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-22 00:04:51 +02:00
Sakari Ailus db3e50f323 device property: Get rid of struct fwnode_handle type field
Instead of relying on the struct fwnode_handle type field, define
fwnode_operations structs for all separate types of fwnodes. To find out
the type, compare to the ops field to relevant ops structs.

This change has two benefits:

1. it avoids adding the type field to each and every instance of struct
fwnode_handle, thus saving memory and

2. makes the ops field the single factor that defines both the types of
the fwnode as well as defines the implementation of its operations,
decreasing the possibility of bugs when developing code dealing with
fwnode internals.

Suggested-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-07-22 00:04:50 +02:00
Rob Herring 0d638a07d3 of: Convert to using %pOF instead of full_name
Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.

Signed-off-by: Rob Herring <robh@kernel.org>
2017-07-18 17:09:18 -05:00
Linus Torvalds 548aa0e3c5 Device properties framework updates for v4.13-rc1
- Rearrange the core device properties code by moving the code
    specific to each supported platform configuration framework
    (ACPI, DT and build-in) into a separate file (Sakari Ailus).
 
  - Add helper functions for accessing device properties in a
    firmware-agnostic way (Sakari Ailus, Kieran Bingham).
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Merge tag 'devprop-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm

Pull device properties framework updates from Rafael Wysocki:
 "These mostly rearrange the device properties core code and add a few
  helper functions to it as a foundation for future work.

  Specifics:

   - Rearrange the core device properties code by moving the code
     specific to each supported platform configuration framework (ACPI,
     DT and build-in) into a separate file (Sakari Ailus).

   - Add helper functions for accessing device properties in a
     firmware-agnostic way (Sakari Ailus, Kieran Bingham)"

* tag 'devprop-4.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm:
  device property: Add fwnode_graph_get_port_parent
  device property: Add FW type agnostic fwnode_graph_get_remote_node
  device property: Introduce fwnode_device_is_available()
  device property: Move fwnode graph ops to firmware specific locations
  device property: Move FW type specific functionality to FW specific files
  ACPI: Constify argument to acpi_device_is_present()
2017-07-10 15:23:45 -07:00
Rob Herring b8ba92b101 Merge branch 'topic/of-graph-base' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound into dt/property-move
OF graph changes for ALSA conflict with the move of graph functions into
property.c.
2017-07-05 08:24:05 -05:00
Sakari Ailus 2294b3af05 device property: Introduce fwnode_device_is_available()
Add fwnode_device_is_available() to tell whether the device corresponding
to a certain fwnode_handle is available for use.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-06-22 02:55:34 +02:00
Sakari Ailus 3b27d00e7b device property: Move fwnode graph ops to firmware specific locations
Move firmware specific implementations of the fwnode graph operations to
firmware specific locations.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-06-22 02:55:34 +02:00
Sakari Ailus 3708184afc device property: Move FW type specific functionality to FW specific files
The device and fwnode property API supports Devicetree, ACPI and pset
properties. The implementation of this functionality for each firmware
type was embedded in the fwnode property core. Move it out to firmware
type specific locations, making it easier to maintain.

Depends-on: ("of: Move OF property and graph API from base.c to property.c")
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
2017-06-22 02:55:34 +02:00
Sakari Ailus 1df09bc66f of: Move OF property and graph API from base.c to property.c
base.c contains both core OF functions and increasingly other
functionality such as accessing properties and graphs, including
convenience functions. In the near future this would also include OF
specific implementation of the fwnode property and graph APIs.

Create driver/of/property.c to contain procedures for accessing and
interpreting device tree properties. The procedures are moved from
drivers/of/base.c, with no changes other than copying only the includes
required by the moved procedures.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Rob Herring <robh@kernel.org>
2017-06-01 08:50:45 -05:00