diff options
| author | Maxime Ripard <maxime.ripard@free-electrons.com> | 2016-07-29 11:55:48 +0200 |
|---|---|---|
| committer | Sebastian Huber <sebastian.huber@embedded-brains.de> | 2018-07-19 07:01:09 +0200 |
| commit | 6112fb0b649a1cdebc127a6a264ab64c1135f7a8 (patch) | |
| tree | 0ba17502f83202c262bdaa0fbe62cd6328daf09e /cpukit/dtc | |
| parent | libfdt: Add fdt_getprop_namelen_w (diff) | |
| download | rtems-6112fb0b649a1cdebc127a6a264ab64c1135f7a8.tar.bz2 | |
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.
Acked-by: Simon Glass <sjg@chromium.org>
Reviewed-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
[dwg: Remove unnecessary unsigned qualifier, correct a comment]
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Diffstat (limited to 'cpukit/dtc')
| -rw-r--r-- | cpukit/dtc/libfdt/fdt_wip.c | 29 |
1 files changed, 25 insertions, 4 deletions
diff --git a/cpukit/dtc/libfdt/fdt_wip.c b/cpukit/dtc/libfdt/fdt_wip.c index c5bbb68d32..6aaab39992 100644 --- a/cpukit/dtc/libfdt/fdt_wip.c +++ b/cpukit/dtc/libfdt/fdt_wip.c @@ -55,21 +55,42 @@ #include "libfdt_internal.h" +int fdt_setprop_inplace_namelen_partial(void *fdt, int nodeoffset, + const char *name, int namelen, + uint32_t idx, const void *val, + int len) +{ + void *propval; + int proplen; + + propval = fdt_getprop_namelen_w(fdt, nodeoffset, name, namelen, + &proplen); + if (!propval) + return proplen; + + if (proplen < (len + idx)) + return -FDT_ERR_NOSPACE; + + memcpy((char *)propval + idx, val, len); + return 0; +} + int fdt_setprop_inplace(void *fdt, int nodeoffset, const char *name, const void *val, int len) { - void *propval; + const void *propval; int proplen; - propval = fdt_getprop_w(fdt, nodeoffset, name, &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) |