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fdtdec: Add weak function to patch U-Boot DT right after fdtdec_setup()

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Add weak function which is called right after fdtdec_setup() configured
the U-Boot DT. This permits board-specific adjustments to the U-Boot DT
before U-Boot starts parsing the DT. This could be used e.g. to patch in
various custom nodes or merge in DT fragments from prior-stage firmware.

Signed-off-by: Marek Vasut <marek.vasut+renesas@gmail.com>
Cc: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Cc: Simon Glass <sjg@chromium.org>
Cc: Tom Rini <trini@konsulko.com>
This commit is contained in:
Marek Vasut 2020-04-11 21:18:59 +02:00
parent c1bde2378a
commit 0e2afc8368
2 changed files with 15 additions and 1 deletions
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5
include/fdtdec.h
View file

@ -1155,6 +1155,11 @@ int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
*/
int fdtdec_setup(void);
/**
* Perform board-specific early DT adjustments
*/
int fdtdec_board_setup(const void *fdt_blob);
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
/**
* fdtdec_resetup() - Set up the device tree again

11
lib/fdtdec.c
View file

@ -1474,8 +1474,14 @@ int fdtdec_set_carveout(void *blob, const char *node, const char *prop_name,
return 0;
}
__weak int fdtdec_board_setup(const void *fdt_blob)
{
return 0;
}
int fdtdec_setup(void)
{
int ret;
#if CONFIG_IS_ENABLED(OF_CONTROL)
# if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
void *fdt_blob;
@ -1528,7 +1534,10 @@ int fdtdec_setup(void)
# endif
#endif
return fdtdec_prepare_fdt();
ret = fdtdec_prepare_fdt();
if (!ret)
ret = fdtdec_board_setup(gd->fdt_blob);
return ret;
}
#if CONFIG_IS_ENABLED(MULTI_DTB_FIT)