path: root/Documentation/devicetree/overlay-notes.txt (follow)
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2018-04-26of: overlay: Stop leaking resources on overlay removalJan Kiszka1-0/+8
Only the overlay notifier callbacks have a chance to potentially get hold of references to those two resources, but they are not supposed to store them beyond OF_OVERLAY_POST_REMOVE. Document the overlay notifier API, its constraint regarding pointer lifetime, and then remove intentional leaks of ovcs->overlay_tree and ovcs->fdt from free_overlay_changeset. See also https://lkml.org/lkml/2018/4/23/1063 and following. Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Reviewed-by: Frank Rowand <frowand.list@gmail.com> Signed-off-by: Rob Herring <robh@kernel.org>
2018-03-17of: Documentation: Fix forgotten reference to of_overlay_apply()Geert Uytterhoeven1-2/+2
Fixes: 93a6039000b5acab ("of: Documentation: of_overlay_apply() replaced by of_overlay_fdt_apply()") Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Signed-off-by: Rob Herring <robh@kernel.org>
2018-03-04of: Documentation: of_overlay_apply() replaced by of_overlay_fdt_apply()Frank Rowand1-2/+2
Signed-off-by: Frank Rowand <frank.rowand@sony.com>
2017-10-17of: overlay: rename identifiers to more reflect what they doFrank Rowand1-6/+6
This patch is aimed primarily at drivers/of/overlay.c, but those changes also have a small impact in a few other files. overlay.c is difficult to read and maintain. Improve readability: - Rename functions, types and variables to better reflect what they do and to be consistent with names in other places, such as the device tree overlay FDT (flattened device tree), and make the algorithms more clear - Use the same names consistently throughout the file - Update comments for name changes - Fix incorrect comments This patch is intended to not introduce any functional change. Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
2017-06-22Documentation: remove overlay-notes reference to non-existent fileFrank Rowand1-5/+3
File dt-object-internal.txt does not exist. Remove a reference to it and fix up tags for references to other files. Reported-by: afaerber@suse.de Signed-off-by: Frank Rowand <frank.rowand@sony.com> Signed-off-by: Rob Herring <robh@kernel.org>
2015-01-28Documentation: devicetree: Fix double words in Doumentation/devicetreeMasanari Iida1-2/+2
This patch fix multiple words such as "the the" and "which which" in Documentation/devicetree. Signed-off-by: Masanari Iida <standby24x7@gmail.com> Signed-off-by: Jonathan Corbet <corbet@lwn.net>
2014-11-24of/overlay: Introduce DT overlay supportPantelis Antoniou1-0/+133
Overlays are a method to dynamically modify part of the kernel's device tree with dynamically loaded data. Add the core functionality to parse, apply and remove an overlay changeset. The core functionality takes care of managing the overlay data format and performing the add and remove. Drivers are expected to use the overlay functionality to support custom expansion busses commonly found on consumer development boards like the BeagleBone or Raspberry Pi. The overlay code uses CONFIG_OF_DYNAMIC changesets to perform the low level work of modifying the devicetree. Documentation about internal and APIs is provided in Documentation/devicetree/overlay-notes.txt v2: - Switch from __of_node_alloc() to __of_node_dup() - Documentation fixups - Remove 2-pass processing of properties - Remove separate ov_lock; just use the DT mutex. v1: - Drop delete capability using '-' prefix. The '-' prefixed names are valid properties and nodes and there is no need for it just yet. - Do not update special properties - name & phandle ones. - Change order of node attachment, so that the special property update works. Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: Grant Likely <grant.likely@linaro.org>