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dtc/libfdt

History

Pantelis Antoniou 1bb00655d3 fdt: Allow stacked overlays phandle references ... This patch enables an overlay to refer to a previous overlay's labels by performing a merge of symbol information at application time. In a nutshell it allows an overlay to refer to a symbol that a previous overlay has defined. It requires both the base and all the overlays to be compiled with the -@ command line switch so that symbol information is included. base.dts -------- /dts-v1/; / { foo: foonode { foo-property; }; }; $ dtc -@ -I dts -O dtb -o base.dtb base.dts bar.dts ------- /dts-v1/; /plugin/; / { fragment@1 { target = <&foo>; __overlay__ { overlay-1-property; bar: barnode { bar-property; }; }; }; }; $ dtc -@ -I dts -O dtb -o bar.dtb bar.dts baz.dts ------- /dts-v1/; /plugin/; / { fragment@1 { target = <&bar>; __overlay__ { overlay-2-property; baz: baznode { baz-property; }; }; }; }; $ dtc -@ -I dts -O dtb -o baz.dtb baz.dts Applying the overlays: $ fdtoverlay -i base.dtb -o target.dtb bar.dtb baz.dtb Dumping: $ fdtdump target.dtb / { foonode { overlay-1-property; foo-property; linux,phandle = <0x00000001>; phandle = <0x00000001>; barnode { overlay-2-property; phandle = <0x00000002>; linux,phandle = <0x00000002>; bar-property; baznode { phandle = <0x00000003>; linux,phandle = <0x00000003>; baz-property; }; }; }; __symbols__ { baz = "/foonode/barnode/baznode"; bar = "/foonode/barnode"; foo = "/foonode"; }; }; Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com> Signed-off-by: David Gibson <david@gibson.dropbear.id.au>		7 years ago
..
Makefile.libfdt	libfdt: Add overlay application function	8 years ago
TODO	…
fdt.c	libfdt: Fix undefined behaviour in fdt_offset_ptr()	9 years ago
fdt.h	Added license header to dtc/libfdt/fdt.h and libfdt_env.h	12 years ago
fdt_addresses.c	libfdt: Add helpers to read #address-cells and #size-cells	11 years ago
fdt_empty_tree.c	Fix a few whitespace and style nits	8 years ago
fdt_overlay.c	fdt: Allow stacked overlays phandle references	7 years ago
fdt_ro.c	Fix a few whitespace and style nits	8 years ago
fdt_rw.c	Introduce fdt_setprop_placeholder() method	7 years ago
fdt_strerror.c	libfdt: add missing errors to fdt_strerror()	8 years ago
fdt_sw.c	Add a libfdt function to write a property placeholder	8 years ago
fdt_wip.c	Fix a few whitespace and style nits	8 years ago
libfdt.h	Introduce fdt_setprop_placeholder() method	7 years ago
libfdt_env.h	libfdt: Change names of sparse helper macros	8 years ago
libfdt_internal.h	libfdt: avoid shadowing "err" in FDT_CHECK_HEADER	11 years ago
version.lds	libfdt: Add fdt_overlay_apply to the exported symbols	8 years ago