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fdt: Add new fdt_create_phandle helper

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Add a helper function that will return a phandle value for the given
node.  If the node doesn't have a phandle already one will be created.

Signed-off-by: Kumar Gala <galak@kernel.crashing.org>
Acked-by: Gerald Van Baren <vanbaren@cideas.com>
This commit is contained in:
Kumar Gala 2011-08-01 00:25:20 -05:00
parent f117c0f073
commit 10aeabd186
2 changed files with 21 additions and 0 deletions
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20
common/fdt_support.c
View File

@ -1235,6 +1235,26 @@ int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
return ret;
}
/*
* fdt_create_phandle: Create a phandle property for the given node
*
* @fdt: ptr to device tree
* @nodeoffset: node to update
*/
int fdt_create_phandle(void *fdt, int nodeoffset)
{
/* see if there is a phandle already */
int phandle = fdt_get_phandle(fdt, nodeoffset);
/* if we got 0, means no phandle so create one */
if (phandle == 0) {
phandle = fdt_alloc_phandle(fdt);
fdt_set_phandle(fdt, nodeoffset, phandle);
}
return phandle;
}
#if defined(CONFIG_VIDEO)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{

1
include/fdt_support.h
View File

@ -90,6 +90,7 @@ int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
phys_addr_t compat_off);
int fdt_alloc_phandle(void *blob);
int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle);
int fdt_create_phandle(void *fdt, int nodeoffset);
int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
int fdt_verify_alias_address(void *fdt, int anode, const char *alias,