From: Che-Liang Chiou clchiou@chromium.org
It decodes a 64-bit value from a property that is at least 8 bytes long.
Signed-off-by: Che-Liang Chiou clchiou@chromium.org
Signed-off-by: Simon Glass sjg@chromium.org --- include/fdtdec.h | 15 +++++++++++++++ lib/fdtdec.c | 13 +++++++++++++ 2 files changed, 28 insertions(+), 0 deletions(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h index 82fdb99..12f73a7 100644 --- a/include/fdtdec.h +++ b/include/fdtdec.h @@ -191,6 +191,21 @@ s32 fdtdec_get_int(const void *blob, int node, const char *prop_name, s32 default_val);
/** + * Look up a 64-bit integer property in a node and return it. The property + * must have at least 8 bytes of data (2 cells). The first two cells are + * concatenated to form a 8 bytes value, where the first cell is top half and + * the second cell is bottom half. + * + * @param blob FDT blob + * @param node node to examine + * @param prop_name name of property to find + * @param default_val default value to return if the property is not found + * @return integer value, if found, or default_val if not + */ +uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, + uint64_t default_val); + +/** * Checks whether a node is enabled. * This looks for a 'status' property. If this exists, then returns 1 if * the status is 'ok' and 0 otherwise. If there is no status property, diff --git a/lib/fdtdec.c b/lib/fdtdec.c index fbb2827..6c417d2 100644 --- a/lib/fdtdec.c +++ b/lib/fdtdec.c @@ -111,6 +111,19 @@ s32 fdtdec_get_int(const void *blob, int node, const char *prop_name, return default_val; }
+uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name, + uint64_t default_val) +{ + const uint64_t *cell64; + int length; + + cell64 = fdt_getprop(blob, node, prop_name, &length); + if (!cell64 || length < sizeof(*cell64)) + return default_val; + + return fdt64_to_cpu(*cell64); +} + int fdtdec_get_is_enabled(const void *blob, int node) { const char *cell;