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dm: core: Add a way to find a device by ofnode

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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>
This commit is contained in:
Simon Glass
2017-05-18 20:09:09 -06:00
parent 19c8205e68
commit 40bb637dae
3 changed files with 72 additions and 0 deletions
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37
drivers/core/uclass.c
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@@ -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)