Add a function to look up a configuration string such as board name
and returns its value. We look in the "/config" node for this.
Signed-off-by: Simon Glass <s...@chromium.org>
---
include/fdtdec.h | 10 ++++++++++
lib/fdtdec.c | 28 ++++++++++++++++++----------
2 files changed, 28 insertions(+), 10 deletions(-)
diff --git a/include/fdtdec.h b/include/fdtdec.h
index d880fe8..e828662 100644
--- a/include/fdtdec.h
+++ b/include/fdtdec.h
@@ -367,6 +367,16 @@ int fdtdec_setup_gpio(struct fdt_gpio_state *gpio);
int fdtdec_get_config_int(const void *blob, const char *prop_name,
int default_val);
+/**
+ * Look in the FDT for a config item with the given name and return its value
+ * as a string.
+ *
+ * @param blob FDT blob
+ * @param prop_name property name to look up
+ * @returns property string, NULL on error.
+ */
+char *fdtdec_get_config_string(const void *blob, const char *prop_name);
+
/*
* 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
diff --git a/lib/fdtdec.c b/lib/fdtdec.c
index 1f50022..2d60c8a 100644
--- a/lib/fdtdec.c
+++ b/lib/fdtdec.c
@@ -513,16 +513,6 @@ const u8 *fdtdec_locate_byte_array(const void *blob, int
node,
return cell;
}
-/**
- * Look in the FDT for a config item with the given name and return its value
- * as a 32-bit integer. The property must have at least 4 bytes of data. The
- * value of the first cell is returned.
- *
- * @param blob FDT blob to use
- * @param prop_name Node property name
- * @param default_val default value to return if the property is not found
- * @return integer value, if found, or default_val if not
- */
int fdtdec_get_config_int(const void *blob, const char *prop_name,
int default_val)
{
@@ -534,3 +524,21 @@ int fdtdec_get_config_int(const void *blob, const char
*prop_name,
return default_val;
return fdtdec_get_int(blob, config_node, prop_name, default_val);
}
+
+char *fdtdec_get_config_string(const void *blob, const char *prop_name)
+{
+ const char *nodep;
+ int nodeoffset;
+ int len;
+
+ debug("%s: %s\n", __func__, prop_name);
+ nodeoffset = fdt_path_offset(blob, "/config");
+ if (nodeoffset < 0)
+ return NULL;
+
+ nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
+ if (!nodep)
+ return NULL;
+
+ return (char *)nodep;
+}
--
1.7.7.3
_______________________________________________
devicetree-discuss mailing list
devicetree-discuss@lists.ozlabs.org
https://lists.ozlabs.org/listinfo/devicetree-discuss
