LineageOS/android_external_dtc
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Introduce fdt_setprop_placeholder() method

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In some cases you need to add a property but the contents of it
are not known at creation time, merely the extend of it.

This method allows you to create a property of a given size (filled
with garbage) while a pointer to the property data will be provided.

Signed-off-by: Pantelis Antoniou <pantelis.antoniou@konsulko.com>
[dwg: Corrected commit message]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
This commit is contained in:
Pantelis Antoniou
2017-07-27 19:33:11 +03:00
committed by David Gibson
parent 0016f8c2aa
commit a33c2247ac
2 changed files with 48 additions and 3 deletions
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20
libfdt/fdt_rw.c
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@@ -269,8 +269,8 @@ int fdt_set_name(void *fdt, int nodeoffset, const char *name)
return 0;
}
int fdt_setprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len)
int fdt_setprop_placeholder(void *fdt, int nodeoffset, const char *name,
int len, void **prop_data)
{
struct fdt_property *prop;
int err;
@@ -283,8 +283,22 @@ int fdt_setprop(void *fdt, int nodeoffset, const char *name,
if (err)
return err;
*prop_data = prop->data;
return 0;
}
int fdt_setprop(void *fdt, int nodeoffset, const char *name,
const void *val, int len)
{
void *prop_data;
int err;
err = fdt_setprop_placeholder(fdt, nodeoffset, name, len, &prop_data);
if (err)
return err;
if (len)
memcpy(prop->data, val, len);
memcpy(prop_data, val, len);
return 0;
}