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7518b5890d
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>
20 lines
780 B
Makefile
20 lines
780 B
Makefile
obj-y = base.o device.o platform.o
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obj-$(CONFIG_OF_DYNAMIC) += dynamic.o
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obj-$(CONFIG_OF_FLATTREE) += fdt.o
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obj-$(CONFIG_OF_EARLY_FLATTREE) += fdt_address.o
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obj-$(CONFIG_OF_PROMTREE) += pdt.o
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obj-$(CONFIG_OF_ADDRESS) += address.o
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obj-$(CONFIG_OF_IRQ) += irq.o
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obj-$(CONFIG_OF_NET) += of_net.o
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obj-$(CONFIG_OF_UNITTEST) += of_unittest.o
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of_unittest-objs := unittest.o unittest-data/testcases.dtb.o
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obj-$(CONFIG_OF_MDIO) += of_mdio.o
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obj-$(CONFIG_OF_PCI) += of_pci.o
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obj-$(CONFIG_OF_PCI_IRQ) += of_pci_irq.o
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obj-$(CONFIG_OF_MTD) += of_mtd.o
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obj-$(CONFIG_OF_RESERVED_MEM) += of_reserved_mem.o
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obj-$(CONFIG_OF_RESOLVE) += resolver.o
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obj-$(CONFIG_OF_OVERLAY) += overlay.o
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CFLAGS_fdt.o = -I$(src)/../../scripts/dtc/libfdt
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CFLAGS_fdt_address.o = -I$(src)/../../scripts/dtc/libfdt
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