summaryrefslogtreecommitdiff
path: root/include
diff options
context:
space:
mode:
authorAnton Staff <robotboy@chromium.org>2012-04-17 09:01:28 +0000
committerAlbert ARIBAUD <albert.u.boot@aribaud.net>2012-05-15 08:31:39 +0200
commitbed4d89277629904bfcefa37589c71e4b7424bea (patch)
treefb96d19d9a5484a4a3098c8e12095bfd77a6ac74 /include
parent649d0ffbc1eca693726937ff40e7d7ab852f4ae9 (diff)
downloadu-boot-imx-bed4d89277629904bfcefa37589c71e4b7424bea.zip
u-boot-imx-bed4d89277629904bfcefa37589c71e4b7424bea.tar.gz
u-boot-imx-bed4d89277629904bfcefa37589c71e4b7424bea.tar.bz2
fdt: Add fdtdec functions to read byte array
Sometimes we don't need a full cell for each value. This provides a simple function to read a byte array, both with and without copying it. Signed-off-by: Simon Glass <sjg@chromium.org> Signed-off-by: Tom Warren <twarren@nvidia.com>
Diffstat (limited to 'include')
-rw-r--r--include/fdtdec.h32
1 files changed, 32 insertions, 0 deletions
diff --git a/include/fdtdec.h b/include/fdtdec.h
index 49251d5..b6db027 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -349,3 +349,35 @@ int fdtdec_decode_gpio(const void *blob, int node, const char *prop_name,
* @return 0 if all ok or gpio was FDT_GPIO_NONE; -1 on error
*/
int fdtdec_setup_gpio(struct fdt_gpio_state *gpio);
+
+/*
+ * Look up a property in a node and return its contents in a byte
+ * array of given length. The property must have at least enough data for
+ * the array (count bytes). It may have more, but this will be ignored.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @param array array to fill with data
+ * @param count number of array elements
+ * @return 0 if ok, or -FDT_ERR_MISSING if the property is not found,
+ * or -FDT_ERR_BADLAYOUT if not enough data
+ */
+int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,
+ u8 *array, int count);
+
+/**
+ * Look up a property in a node and return a pointer to its contents as a
+ * byte array of given length. The property must have at least enough data
+ * for the array (count bytes). It may have more, but this will be ignored.
+ * The data is not copied.
+ *
+ * @param blob FDT blob
+ * @param node node to examine
+ * @param prop_name name of property to find
+ * @param count number of array elements
+ * @return pointer to byte array if found, or NULL if the property is not
+ * found or there is not enough data
+ */
+const u8 *fdtdec_locate_byte_array(const void *blob, int node,
+ const char *prop_name, int count);