On Mon, Jan 12, 2026 at 03:19:58PM +0100, Herve Codina wrote:
> The future support for applying a addon on a base device-tree needs to
> modify properties retrieved by their offset.
>
> fdt_getprop_by_offset() already exists to get a preperty by its offset
> but the property returned is read-only. A writable returned property is
> needed.
>
> Fill the lack and introduce fdt_getprop_by_offset_w(), the write enabled
> variant of fdt_getprop_by_offset().
>
> Signed-off-by: Herve Codina <herve.codina@bootlin.com>
Add a testcase, and this could be merged regardless of the rest of
the series.
> ---
> libfdt/libfdt.h | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/libfdt/libfdt.h b/libfdt/libfdt.h
> index 37459a6..0c654b1 100644
> --- a/libfdt/libfdt.h
> +++ b/libfdt/libfdt.h
> @@ -858,6 +858,12 @@ static inline struct fdt_property *fdt_get_property_w(void *fdt, int nodeoffset,
> #ifndef SWIG /* This function is not useful in Python */
> const void *fdt_getprop_by_offset(const void *fdt, int offset,
> const char **namep, int *lenp);
> +static inline void *fdt_getprop_by_offset_w(const void *fdt, int offset,
> + const char **namep, int *lenp)
> +{
> + return (void *)(uintptr_t)fdt_getprop_by_offset(fdt, offset, namep,
> + lenp);
> +}
> #endif
>
> /**
> --
> 2.52.0
>
>
--
David Gibson (he or they) | I'll have my music baroque, and my code
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| around.
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