From 1b30d61d786421a5d02725a9945552cc9c09914b Mon Sep 17 00:00:00 2001
From: Simon Glass <sjg@chromium.org>
Date: Thu, 21 Jan 2016 19:43:57 -0700
Subject: [PATCH] dm: core: Export uclass_find_device_by_of_offset()
It is sometimes useful to be able to find a device before probing it,
perhaps to set up some platform data for it. Allow finding by of_offset
also.
Signed-off-by: Simon Glass <sjg@chromium.org>
---
drivers/core/uclass.c | 4 ++--
include/dm/uclass-internal.h | 16 ++++++++++++++++
2 files changed, 18 insertions(+), 2 deletions(-)
diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index e1acefe727..12095e75a4 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -254,8 +254,8 @@ int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
return -ENODEV;
}
-static int uclass_find_device_by_of_offset(enum uclass_id id, int node,
- struct udevice **devp)
+int uclass_find_device_by_of_offset(enum uclass_id id, int node,
+ struct udevice **devp)
{
struct uclass *uc;
struct udevice *dev;
diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h
index b51e1da5c1..ad284b8445 100644
--- a/include/dm/uclass-internal.h
+++ b/include/dm/uclass-internal.h
@@ -98,6 +98,22 @@ int uclass_find_device_by_name(enum uclass_id id, const char *name,
int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
bool find_req_seq, struct udevice **devp);
+/**
+ * uclass_find_device_by_of_offset() - 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 -ve 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_of_offset(enum uclass_id id, int node,
+ struct udevice **devp);
+
/**
* uclass_bind_device() - Associate device with a uclass
*
--
2.39.5