diff options
| author | Rob Clark <robdclark@gmail.com> | 2018-01-10 11:34:37 +0100 |
|---|---|---|
| committer | Tom Rini <trini@konsulko.com> | 2018-01-15 16:29:03 -0500 |
| commit | 3b595da441cf38d1905684dea28767afeb732838 (patch) | |
| tree | 611463b0c0035b59eceb738cb27e98770edc71fb /lib/fdtdec.c | |
| parent | 0689eb74700178d6e95b4c780a36473db8901453 (diff) | |
fdtdec: allow board to provide fdt for CONFIG_OF_SEPARATE
Similar to CONFIG_OF_BOARD, but in this case the fdt is still built by
u-boot build. This allows the board to patch the fdt, etc.
In the specific case of dragonboard 410c, we pass the u-boot generated
fdt to the previous stage of bootloader (by embedding it in the
u-boot.img that is loaded by lk/aboot), which patches the fdt and passes
it back to u-boot.
Signed-off-by: Rob Clark <robdclark@gmail.com>
[trini: Update board_fdt_blob_setup #if check]
Signed-off-by: Tom Rini <trini@konsulko.com>
Diffstat (limited to 'lib/fdtdec.c')
| -rw-r--r-- | lib/fdtdec.c | 35 |
1 files changed, 23 insertions, 12 deletions
diff --git a/lib/fdtdec.c b/lib/fdtdec.c index 30ec6b92b2..6b138faf85 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -1272,6 +1272,28 @@ static int uncompress_blob(const void *src, ulong sz_src, void **dstp) # endif #endif +#if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE) +/* + * For CONFIG_OF_SEPARATE, the board may optionally implement this to + * provide and/or fixup the fdt. + */ +__weak void *board_fdt_blob_setup(void) +{ + void *fdt_blob = NULL; +#ifdef CONFIG_SPL_BUILD + /* FDT is at end of BSS unless it is in a different memory region */ + if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) + fdt_blob = (ulong *)&_image_binary_end; + else + fdt_blob = (ulong *)&__bss_end; +#else + /* FDT is at end of image */ + fdt_blob = (ulong *)&_end; +#endif + return fdt_blob; +} +#endif + int fdtdec_setup(void) { #if CONFIG_IS_ENABLED(OF_CONTROL) @@ -1285,18 +1307,7 @@ int fdtdec_setup(void) # else gd->fdt_blob = __dtb_dt_begin; # endif -# elif defined CONFIG_OF_SEPARATE -# ifdef CONFIG_SPL_BUILD - /* FDT is at end of BSS unless it is in a different memory region */ - if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS)) - gd->fdt_blob = (ulong *)&_image_binary_end; - else - gd->fdt_blob = (ulong *)&__bss_end; -# else - /* FDT is at end of image */ - gd->fdt_blob = (ulong *)&_end; -# endif -# elif defined(CONFIG_OF_BOARD) +# elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE) /* Allow the board to override the fdt address. */ gd->fdt_blob = board_fdt_blob_setup(); # elif defined(CONFIG_OF_HOSTFILE) |