[U-Boot] [PATCH v4 01/20] SPL: FIT: refactor FDT loading

[Heiko Stuebner]

Am Mittwoch, 26. April 2017, 01:32:33 CEST schrieb Andre Przywara:
> Currently the SPL FIT loader uses the spl_fit_select_fdt() function to
> find the offset to the right DTB within the FIT image.
> For this it iterates over all subnodes of the /configuration node in
> the FIT tree and compares all "description" strings therein using a
> board specific matching function.
> If that finds a match, it uses the string in the "fdt" property of that
> subnode to locate the matching subnode in the /images node, which points
> to the DTB data.
> Now this works very well, but is quite specific to cover this particular
> use case. To open up the door for a more generic usage, let's split this
> function into:
> 1) a function that just returns the node offset for the matching
>    configuration node (spl_fit_find_config_node())
> 2) a function that returns the image data any given property in a given
>    configuration node points to, additionally using a given index into
>    a possbile list of strings (spl_fit_select_index())
> This allows us to replace the specific function above by asking for the
> image the _first string of the "fdt" property_ in the matching
> configuration subnode points to.
> 
> This patch introduces no functional changes, it just refactors the code
> to allow reusing it later.
> 
> (diff is overly clever here and produces a hard-to-read patch, so I
> recommend to throw a look at the result instead).
> 
> Signed-off-by: Andre Przywara <andre.przywara at arm.com>
> Reviewed-by: Lokesh Vutla <lokeshvuta at ti.com>
> Reviewed-by: Simon Glass <sjg at chromium.org>

On a rk3399-firefly
Tested-by: Heiko Stuebner <heiko at sntech.de>