[U-Boot] [PATCH 34/50] dm: core: Export uclass_find_device_by_of_offset()

Simon Glass
2016-01-13T23:25:24Z

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 7f38dae..020b6bc 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 b51e1da..ad284b8 100644
--- a/include/dm/uclass-internal.h
+++ b/include/dm/uclass-internal.h
@@ -99,6 +99,22 @@ 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
*
* Connect the device into uclass's list of devices.
--
2.6.0.rc2.230.g3dd15c0