libfdt: Add fdt_setprop_inplace_namelen_partial
Add a function to modify inplace only a portion of a property..
This is especially useful when the property is an array of values, and you
want to update one of them without changing the DT size.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Simon Glass <sjg@chromium.org>
diff --git a/lib/libfdt/fdt_wip.c b/lib/libfdt/fdt_wip.c
index 9fe9886..216c512 100644
--- a/lib/libfdt/fdt_wip.c
+++ b/lib/libfdt/fdt_wip.c
@@ -14,21 +14,42 @@
#include "libfdt_internal.h"
-int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
- const void *val, int len)
+int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset,
+ const char *name, int namelen,
+ uint32_t index, const void *val,
+ int len)
{
void *propval;
int proplen;
- propval = fdt_getprop_w(fdt, nodeoffset, name, &proplen);
+ propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen,
+ &proplen);
+ if (!propval)
+ return proplen;
+
+ if (proplen < (len + index))
+ return -FDT_ERR_NOSPACE;
+
+ memcpy(propval + index, val, len);
+ return 0;
+}
+
+int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name,
+ const void *val, int len)
+{
+ const void *propval;
+ int proplen;
+
+ propval = fdt_getprop(fdt, nodeoffset, name, &proplen);
if (!propval)
return proplen;
if (proplen != len)
return -FDT_ERR_NOSPACE;
- memcpy(propval, val, len);
- return 0;
+ return fdt_setprop_inplace_namelen_partial(fdt, nodeoffset, name,
+ strlen(name), 0,
+ val, len);
}
static void _fdt_nop_region(void *start, int len)