From 40bb637dae10abff32ca2d952fd443e0e09fd524 Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 18 May 2017 20:09:09 -0600
Subject: dm: core: Add a way to find a device by ofnode

Add a function which looks up a device by its node (either in live tree
or flat tree).

Signed-off-by: Simon Glass <sjg@chromium.org>
---
 include/dm/uclass-internal.h | 18 ++++++++++++++++++
 include/dm/uclass.h          | 17 +++++++++++++++++
 2 files changed, 35 insertions(+)

(limited to 'include')

diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h
index ad284b8445..c086004318 100644
--- a/include/dm/uclass-internal.h
+++ b/include/dm/uclass-internal.h
@@ -10,6 +10,8 @@
 #ifndef _DM_UCLASS_INTERNAL_H
 #define _DM_UCLASS_INTERNAL_H
 
+#include <dm/ofnode.h>
+
 /**
  * uclass_get_device_tail() - handle the end of a get_device call
  *
@@ -114,6 +116,22 @@ int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
 int uclass_find_device_by_of_offset(enum uclass_id id, int node,
 				    struct udevice **devp);
 
+/**
+ * uclass_find_device_by_of_node() - Find a uclass device by device tree node
+ *
+ * This searches the devices in the uclass for one attached to the given
+ * device tree node.
+ *
+ * The device is NOT probed, it is merely returned.
+ *
+ * @id: ID to look up
+ * @node: Device tree offset to search for (if NULL then -ENODEV is returned)
+ * @devp: Returns pointer to device (there is only one for each node)
+ * @return 0 if OK, -ve on error
+ */
+int uclass_find_device_by_ofnode(enum uclass_id id, ofnode node,
+				 struct udevice **devp);
+
 /**
  * uclass_bind_device() - Associate device with a uclass
  *
diff --git a/include/dm/uclass.h b/include/dm/uclass.h
index b583aa869b..7f5a1304b5 100644
--- a/include/dm/uclass.h
+++ b/include/dm/uclass.h
@@ -10,6 +10,7 @@
 #ifndef _DM_UCLASS_H
 #define _DM_UCLASS_H
 
+#include <dm/ofnode.h>
 #include <dm/uclass-id.h>
 #include <linker_lists.h>
 #include <linux/list.h>
@@ -185,6 +186,22 @@ int uclass_get_device_by_seq(enum uclass_id id, int seq, struct udevice **devp);
 int uclass_get_device_by_of_offset(enum uclass_id id, int node,
 				   struct udevice **devp);
 
+/**
+ * uclass_get_device_by_ofnode() - Get a uclass device by device tree node
+ *
+ * This searches the devices in the uclass for one attached to the given
+ * device tree node.
+ *
+ * The device is probed to activate it ready for use.
+ *
+ * @id: ID to look up
+ * @np: Device tree node to search for (if NULL then -ENODEV is returned)
+ * @devp: Returns pointer to device (there is only one for each node)
+ * @return 0 if OK, -ve on error
+ */
+int uclass_get_device_by_ofnode(enum uclass_id id, ofnode node,
+				struct udevice **devp);
+
 /**
  * uclass_get_device_by_phandle() - Get a uclass device by phandle
  *
-- 
cgit