dm: core: add ofnode_get_path()
Add function for retrieving full node path of a given ofnode.
This uses np->full_name if OF is live, otherwise a call to
fdt_get_path() is made.
Signed-off-by: Marek Behún <marek.behun@nic.cz>
Reviewed-by: Simon Glass <sjg@chromium.org>
Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com>
Tested-by: Patrice Chotard <patrice.chotard@foss.st.com>
Reviewed-by: Jagan Teki <jagan@amarulasolutions.com>
diff --git a/drivers/core/ofnode.c b/drivers/core/ofnode.c
index dd34cf8..eeeccfb 100644
--- a/drivers/core/ofnode.c
+++ b/drivers/core/ofnode.c
@@ -286,6 +286,31 @@
return fdt_get_name(gd->fdt_blob, ofnode_to_offset(node), NULL);
}
+int ofnode_get_path(ofnode node, char *buf, int buflen)
+{
+ assert(ofnode_valid(node));
+
+ if (ofnode_is_np(node)) {
+ if (strlen(node.np->full_name) >= buflen)
+ return -ENOSPC;
+
+ strcpy(buf, node.np->full_name);
+
+ return 0;
+ } else {
+ int res;
+
+ res = fdt_get_path(gd->fdt_blob, ofnode_to_offset(node), buf,
+ buflen);
+ if (!res)
+ return res;
+ else if (res == -FDT_ERR_NOSPACE)
+ return -ENOSPC;
+ else
+ return -EINVAL;
+ }
+}
+
ofnode ofnode_get_by_phandle(uint phandle)
{
ofnode node;
diff --git a/include/dm/ofnode.h b/include/dm/ofnode.h
index e3fccb5..3da05d8 100644
--- a/include/dm/ofnode.h
+++ b/include/dm/ofnode.h
@@ -459,6 +459,16 @@
const char *ofnode_get_name(ofnode node);
/**
+ * ofnode_get_path() - get the full path of a node
+ *
+ * @node: valid node to look up
+ * @buf: buffer to write the node path into
+ * @buflen: buffer size
+ * @return 0 if OK, -ve on error
+ */
+int ofnode_get_path(ofnode node, char *buf, int buflen);
+
+/**
* ofnode_get_by_phandle() - get ofnode from phandle
*
* @phandle: phandle to look up
diff --git a/test/dm/ofnode.c b/test/dm/ofnode.c
index 9a69cf7..94a4d21 100644
--- a/test/dm/ofnode.c
+++ b/test/dm/ofnode.c
@@ -297,3 +297,24 @@
return 0;
}
DM_TEST(dm_test_ofnode_get_reg, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);
+
+static int dm_test_ofnode_get_path(struct unit_test_state *uts)
+{
+ const char *path = "/translation-test@8000/noxlatebus@3,300/dev@42";
+ char buf[64];
+ ofnode node;
+ int res;
+
+ node = ofnode_path(path);
+ ut_assert(ofnode_valid(node));
+
+ res = ofnode_get_path(node, buf, 64);
+ ut_asserteq(0, res);
+ ut_asserteq_str(path, buf);
+
+ res = ofnode_get_path(node, buf, 32);
+ ut_asserteq(-ENOSPC, res);
+
+ return 0;
+}
+DM_TEST(dm_test_ofnode_get_path, UT_TESTF_SCAN_PDATA | UT_TESTF_SCAN_FDT);