Add ability to resolve symbols pointing to phandles instead of strings. Combining this with existing fixups infrastructure allows creating symbols in overlays that refer to undefined phandles. This is planned to be used for addon board chaining [1]. [1] https://lore.kernel.org/linux-arm-kernel/20240702164403.29067-1-afd@xxxxxx/ Signed-off-by: Ayush Singh <ayush@xxxxxxxxxxxxxxx> --- libfdt/fdt_overlay.c | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) diff --git a/libfdt/fdt_overlay.c b/libfdt/fdt_overlay.c index 28b667f..10127be 100644 --- a/libfdt/fdt_overlay.c +++ b/libfdt/fdt_overlay.c @@ -395,12 +395,16 @@ static int overlay_fixup_phandle(void *fdt, void *fdto, int symbols_off, symbol_path = fdt_getprop(fdt, symbols_off, label, &prop_len); if (!symbol_path) return prop_len; - - symbol_off = fdt_path_offset(fdt, symbol_path); - if (symbol_off < 0) - return symbol_off; - - phandle = fdt_get_phandle(fdt, symbol_off); + + if (prop_len == sizeof(uint32_t) && symbol_path[0] != '/') { + phandle = fdt32_ld((const fdt32_t *)symbol_path); + } else { + symbol_off = fdt_path_offset(fdt, symbol_path); + if (symbol_off < 0) + return symbol_off; + phandle = fdt_get_phandle(fdt, symbol_off); + } + if (!phandle) return -FDT_ERR_NOTFOUND; -- 2.46.0
