From aadef0a1bc3db81708471c9d18eb6c756659196f Mon Sep 17 00:00:00 2001
From: Che-Liang Chiou <clchiou@chromium.org>
Date: Thu, 25 Oct 2012 16:31:05 +0000
Subject: [PATCH] fdt: Add fdtdec_get_uint64 to decode a 64-bit value from a
property
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(+)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index a37cf54a93..b5d7d2f54a 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -181,6 +181,21 @@ fdt_addr_t fdtdec_get_addr(const void *blob, int node,
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
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index da12df209c..150512e5a8 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;
--
2.39.5