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fdt: introduce fdt_create_phandle()

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The ePAPR specification says that phandle properties should be called
"phandle", and not "linux,phandle".  To facilitate the migration from
"linux,phandle" to "phandle", introduce function fdt_create_phandle(),
which creates a phandle in a given node.  For now, we create both the
"phandle" and "linux,phandle" properties.  A later version of this
function will remove support for "linux,phandle".

Signed-off-by: Timur Tabi <timur@freescale.com>
This commit is contained in:
Gerald Van Baren 2011-07-14 21:40:10 -04:00
parent b3606f141e
commit a8d2a75d72
2 changed files with 41 additions and 0 deletions
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40
common/fdt_support.c
View file

@ -1195,6 +1195,46 @@ int fdt_alloc_phandle(void *blob)
return phandle + 1;
}
/*
* fdt_create_phandle: Create a phandle property for the given node
*
* @fdt: ptr to device tree
* @nodeoffset: node to update
* @phandle: phandle value to set (must be unique)
*/
int fdt_create_phandle(void *fdt, int nodeoffset, uint32_t phandle)
{
int ret;
#ifdef DEBUG
int off = fdt_node_offset_by_phandle(fdt, phandle);
if ((off >= 0) && (off != nodeoffset)) {
char buf[64];
fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
printf("Trying to update node %s with phandle %u ",
buf, phandle);
fdt_get_path(fdt, off, buf, sizeof(buf));
printf("that already exists in node %s.\n", buf);
return -FDT_ERR_BADPHANDLE;
}
#endif
ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
if (ret < 0)
return ret;
/*
* For now, also set the deprecated "linux,phandle" property, so that we
* don't break older kernels.
*/
ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
return ret;
}
#if defined(CONFIG_VIDEO)
int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
{

1
include/fdt_support.h
View file

@ -89,6 +89,7 @@ u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr);
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_create_phandle(void *fdt, int nodeoffset, uint32_t phandle);
int fdt_add_edid(void *blob, const char *compat, unsigned char *buf);
int fdt_verify_alias_address(void *fdt, int anode, const char *alias,