The following patchset introduces Device Tree overlays, a method of dynamically altering the kernel's live Device Tree, along with a generic interface to use it in a board agnostic manner. It is against linux-next as of today 28/5/2014 "134a9c91121b1081bcf737045a11b0510c5c9dfb - Add linux-next specific files for 20140528" It relies on the following previously submitted patches/patchsets: * OF: Add [__]of_find_node_by_full_name * OF: Utility helper functions for dynamic nodes To compile overlays you need the DTC compiler patch * "dtc: Dynamic symbols & fixup support (v2)" Changes since V4: * New API of_overlay_create/destroy being able to support stacked overlays correctly. * Removed use of notifiers internally. * Removed own-grown bus handler notifiers; using already in-place DT notification infrastructure. * Split SPI notifier patch to one patch of generic changes and one for DT overlay notifier. * Removed unused overlay depth feature. * Updated documentation. * Moved configfs based interface to using the new API. * Added overlay removal stacking tests. Changes since V3: * Added overlay self-tests. * Fix bug in of_init_overlay_info (wrong sizeof) * Platform bus handler handles parent_pdev == NULL * of_resolve fixes according to comments by robh + changed if (foo == NULL) to if (!foo) + changed if (foo != NULL) to if (foo) + drivers/of/Kconfig added dep on OF && !SPARC + convert to using be32_to_cpup + u32 -> __be32 when modifying property values + cosmetic fixes Changes since V2: * Use of a configfs board agnostic overlay method * Use of per bus handlers instead of hardcoded behaviour * Optional target-path overlay target, which allows one to use standard DTBs without resolution options. Changes since V1: * Removal of any bits related to a specific board (beaglebone). * Introduced a platform agnostic interface using /proc/device-tree-overlay * Various bug fixes related to i2c device handling have been squashed in. Pantelis Antoniou (9): OF: Introduce Device Tree resolve support. OF: Introduce DT overlay support. OF: DT-Overlay configfs interface OF: platform: Add OF notifier handler of: i2c: Export single device registration method OF: i2c: Add OF notifier handler of: spi: Export single device registration method and accessors OF: spi: Add OF notifier handler OF: selftest: Add overlay self-test support. Documentation/devicetree/bindings/selftest.txt | 14 + .../devicetree/dynamic-resolution-notes.txt | 25 + Documentation/devicetree/overlay-notes.txt | 160 ++++ drivers/base/platform.c | 69 +- drivers/i2c/i2c-core.c | 165 +++- drivers/of/Kconfig | 20 + drivers/of/Makefile | 3 + drivers/of/configfs.c | 251 +++++ drivers/of/overlay.c | 1001 ++++++++++++++++++++ drivers/of/resolver.c | 378 ++++++++ drivers/of/selftest.c | 481 ++++++++++ drivers/of/testcase-data/testcases.dtsi | 1 + drivers/of/testcase-data/tests-overlay.dtsi | 180 ++++ drivers/spi/spi.c | 323 +++++-- include/linux/i2c.h | 10 + include/linux/of.h | 167 ++++ 16 files changed, 3094 insertions(+), 154 deletions(-) create mode 100644 Documentation/devicetree/bindings/selftest.txt create mode 100644 Documentation/devicetree/dynamic-resolution-notes.txt create mode 100644 Documentation/devicetree/overlay-notes.txt create mode 100644 drivers/of/configfs.c create mode 100644 drivers/of/overlay.c create mode 100644 drivers/of/resolver.c create mode 100644 drivers/of/testcase-data/tests-overlay.dtsi -- 1.7.12 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
