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fdt: Documentation for a few support functions aside their prototypes

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This instroduces comments that explain the purpose, parameters and return codes
of a few fdt support functions, that are used to fill the fdt.

Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Paul Kocialkowski 2015-05-24 12:01:53 +02:00 committed by Simon Glass
parent 10be5b5d3a
commit 3c4c142e5d
1 changed files with 26 additions and 0 deletions
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26
include/fdt_support.h
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@ -16,9 +16,35 @@ u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
const char *prop, const u32 dflt);
u32 fdt_getprop_u32_default(const void *fdt, const char *path,
const char *prop, const u32 dflt);
/**
* Add data to the root of the FDT before booting the OS.
*
* See doc/device-tree-bindings/root.txt
*
* @param fdt FDT address in memory
* @return 0 if ok, or -FDT_ERR_... on error
*/
int fdt_root(void *fdt);
/**
* Add chosen data the FDT before booting the OS.
*
* In particular, this adds the kernel command line (bootargs) to the FDT.
*
* @param fdt FDT address in memory
* @return 0 if ok, or -FDT_ERR_... on error
*/
int fdt_chosen(void *fdt);
/**
* Add initrd information to the FDT before booting the OS.
*
* @param fdt FDT address in memory
* @return 0 if ok, or -FDT_ERR_... on error
*/
int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end);
void do_fixup_by_path(void *fdt, const char *path, const char *prop,
const void *val, int len, int create);
void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,