From: Che-Liang Chiou <clch...@chromium.org>
It decodes a 64-bit value from a property that is at least 8 bytes long.
Signed-off-by: Che-Liang Chiou <clch...@chromium.org>
Signed-off-by: Simon Glass <s...@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;
--
1.7.7.3
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