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fdt: Add fdt_getprop_u32_default helpers
Add helper functions to return find a node and return it's property or a default value. Signed-off-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Andrew Fleming-AFLEMING <afleming@freescale.com> Acked-by: Gerald Van Baren <vanbaren@cideas.com>
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2 changed files with 29 additions and 0 deletions
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@ -35,6 +35,33 @@
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*/
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DECLARE_GLOBAL_DATA_PTR;
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/**
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* fdt_getprop_u32_default - Find a node and return it's property or a default
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*
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* @fdt: ptr to device tree
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* @path: path of node
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* @prop: property name
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* @dflt: default value if the property isn't found
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*
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* Convenience function to find a node and return it's property or a
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* default value if it doesn't exist.
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*/
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u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop,
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const u32 dflt)
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{
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const u32 *val;
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int off;
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off = fdt_path_offset(fdt, path);
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if (off < 0)
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return dflt;
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val = fdt_getprop(fdt, off, prop, NULL);
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if (val)
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return *val;
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else
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return dflt;
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}
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/**
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* fdt_find_and_setprop: Find a node and set it's property
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@ -28,6 +28,8 @@
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#include <fdt.h>
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u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop,
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const u32 dflt);
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int fdt_chosen(void *fdt, int force);
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int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force);
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void do_fixup_by_path(void *fdt, const char *path, const char *prop,
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