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fdt: Move MULTI_DTB_FIT handling out of fdtdec_setup()

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This logic is a bit convoluted for one function. Move the mulit-FIT part
into its own function.

Signed-off-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Ilias Apalodimas <ilias.apalodimas@linaro.org>
This commit is contained in:
Simon Glass 2021-12-16 20:59:24 -07:00 committed by Tom Rini
parent ed96683e00
commit 3f51f78cbd
1 changed files with 38 additions and 24 deletions
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62
lib/fdtdec.c
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@ -1594,13 +1594,46 @@ __weak int fdtdec_board_setup(const void *fdt_blob)
return 0;
}
/**
* setup_multi_dtb_fit() - locate the correct dtb from a FIT
*
* This supports the CONFIG_MULTI_DTB_FIT feature, looking for the dtb in a
* supplied FIT
*
* It accepts the current value of gd->fdt_blob, which points to the FIT, then
* updates that gd->fdt_blob, to point to the chosen dtb so that U-Boot uses the
* correct one
*/
static void setup_multi_dtb_fit(void)
{
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
void *blob;
/*
* Try and uncompress the blob.
* Unfortunately there is no way to know how big the input blob really
* is. So let us set the maximum input size arbitrarily high. 16MB
* ought to be more than enough for packed DTBs.
*/
if (uncompress_blob(gd->fdt_blob, 0x1000000, &blob) == 0)
gd->fdt_blob = blob;
/*
* Check if blob is a FIT images containings DTBs.
* If so, pick the most relevant
*/
blob = locate_dtb_in_fit(gd->fdt_blob);
if (blob) {
gd->multi_dtb_fit = gd->fdt_blob;
gd->fdt_blob = blob;
}
#endif /* # MULTI_DTB_FIT */
}
int fdtdec_setup(void)
{
int ret;
#if CONFIG_IS_ENABLED(OF_CONTROL)
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
void *fdt_blob;
# endif
# ifdef CONFIG_OF_EMBED
/* Get a pointer to the FDT */
# ifdef CONFIG_SPL_BUILD
@ -1621,27 +1654,8 @@ int fdtdec_setup(void)
(unsigned long)map_to_sysmem(gd->fdt_blob)), 0);
# endif
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
/*
* Try and uncompress the blob.
* Unfortunately there is no way to know how big the input blob really
* is. So let us set the maximum input size arbitrarily high. 16MB
* ought to be more than enough for packed DTBs.
*/
if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
gd->fdt_blob = fdt_blob;
/*
* Check if blob is a FIT images containings DTBs.
* If so, pick the most relevant
*/
fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
if (fdt_blob) {
gd->multi_dtb_fit = gd->fdt_blob;
gd->fdt_blob = fdt_blob;
}
# endif
if (CONFIG_IS_ENABLED(MULTI_DTB_FIT))
setup_multi_dtb_fit();
#endif
ret = fdtdec_prepare_fdt();