Add a function which looks up a device by its node (either in live tree
or flat tree).
Signed-off-by: Simon Glass <s...@chromium.org>
---
Changes in v2: None
drivers/core/uclass.c | 37 +++++++++++++++++++++++++++++++++++++
include/dm/uclass-internal.h | 16 ++++++++++++++++
include/dm/uclass.h | 16 ++++++++++++++++
3 files changed, 69 insertions(+)
diff --git a/drivers/core/uclass.c b/drivers/core/uclass.c
index 04fb45b01a..630b2e7336 100644
--- a/drivers/core/uclass.c
+++ b/drivers/core/uclass.c
@@ -8,6 +8,7 @@
*/
#include <common.h>
+#include <dm.h>
#include <errno.h>
#include <malloc.h>
#include <dm/device.h>
@@ -287,6 +288,30 @@ int uclass_find_device_by_of_offset(enum uclass_id id, int
node,
return -ENODEV;
}
+int uclass_find_device_by_ofnode(enum uclass_id id, ofnode node,
+ struct udevice **devp)
+{
+ struct uclass *uc;
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ if (!ofnode_valid(node))
+ return -ENODEV;
+ ret = uclass_get(id, &uc);
+ if (ret)
+ return ret;
+
+ list_for_each_entry(dev, &uc->dev_head, uclass_node) {
+ if (ofnode_equal(dev_ofnode(dev), node)) {
+ *devp = dev;
+ return 0;
+ }
+ }
+
+ return -ENODEV;
+}
+
#if CONFIG_IS_ENABLED(OF_CONTROL)
static int uclass_find_device_by_phandle(enum uclass_id id,
struct udevice *parent,
@@ -407,6 +432,18 @@ int uclass_get_device_by_of_offset(enum uclass_id id, int
node,
return uclass_get_device_tail(dev, ret, devp);
}
+int uclass_get_device_by_ofnode(enum uclass_id id, ofnode node,
+ struct udevice **devp)
+{
+ struct udevice *dev;
+ int ret;
+
+ *devp = NULL;
+ ret = uclass_find_device_by_ofnode(id, node, &dev);
+
+ return uclass_get_device_tail(dev, ret, devp);
+}
+
#if CONFIG_IS_ENABLED(OF_CONTROL)
int uclass_get_device_by_phandle(enum uclass_id id, struct udevice *parent,
const char *name, struct udevice **devp)
diff --git a/include/dm/uclass-internal.h b/include/dm/uclass-internal.h
index ad284b8445..4474cef29e 100644
--- a/include/dm/uclass-internal.h
+++ b/include/dm/uclass-internal.h
@@ -114,6 +114,22 @@ 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..89d1f4467c 100644
--- a/include/dm/uclass.h
+++ b/include/dm/uclass.h
@@ -185,6 +185,22 @@ 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
*
--
2.13.0.rc2.291.g57267f2277-goog
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