lib, fdt: Adding fdtdec_get_uint function

Adding fdtdec_get_uint function which is the
unsigned version for fdtdec_get_int

Signed-off-by: Chin Liang See <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Dinh Nguyen <[email protected]>
Cc: Marek Vasut <[email protected]>
Cc: Stefan Roese <[email protected]>
Cc: Vikas Manocha <[email protected]>
Cc: Jagannadh Teki <[email protected]>
Cc: Pavel Machek <[email protected]>
Cc: Heiko Schocher <[email protected]>

2 files changed, 31 insertions, 0 deletions

diff --git a/include/fdtdec.h b/include/fdtdec.h
index 2de6dda04c5..d51e643ac3b 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -490,6 +490,19 @@ s32 fdtdec_get_int(const void *blob, int node, const char *prop_name,
 		s32 default_val);
 
 /**
+ * Unsigned version of fdtdec_get_int. The property must have at least
+ * 4 bytes of data. The value of the first cell is returned.
+ *
+ * @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 unsigned integer value, if found, or default_val if not
+ */
+unsigned int fdtdec_get_uint(const void *blob, int node, const char *prop_name,
+			unsigned int default_val);
+
+/**
  * Get a variable-sized number from a property
  *
  * This reads a number from one or more cells.
diff --git a/lib/fdtdec_common.c b/lib/fdtdec_common.c
index 757931a9cb2..63b704a3d71 100644
--- a/lib/fdtdec_common.c
+++ b/lib/fdtdec_common.c
@@ -36,3 +36,21 @@ int fdtdec_get_int(const void *blob, int node, const char *prop_name,
 	debug("(not found)\n");
 	return default_val;
 }
+
+unsigned int fdtdec_get_uint(const void *blob, int node, const char *prop_name,
+			unsigned int default_val)
+{
+	const int *cell;
+	int len;
+
+	debug("%s: %s: ", __func__, prop_name);
+	cell = fdt_getprop(blob, node, prop_name, &len);
+	if (cell && len >= sizeof(unsigned int)) {
+		unsigned int val = fdt32_to_cpu(cell[0]);
+
+		debug("%#x (%d)\n", val, val);
+		return val;
+	}
+	debug("(not found)\n");
+	return default_val;
+}