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dm: core: add internal functions for getting the device without probe 

This commit extends the uclass-internal functions by:
- uclass_find_first_device()
- uclass_find_next_device()
For both functions, the returned device is not probed.

After some cleanup, the above functions are called by:
- uclass_first_device()
- uclass_next_device()
for which, the returned device is probed.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Acked-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Przemyslaw Marczak 2015-04-15 13:07:17 +02:00 committed by Simon Glass
parent d77447fdb1
commit c1d6f91952
2 changed files with 56 additions and 25 deletions
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59
drivers/core/uclass.c
View File

@ -156,6 +156,36 @@ int uclass_find_device(enum uclass_id id, int index, struct udevice **devp)
return -ENODEV;
}
int uclass_find_first_device(enum uclass_id id, struct udevice **devp)
{
struct uclass *uc;
int ret;
*devp = NULL;
ret = uclass_get(id, &uc);
if (ret)
return ret;
if (list_empty(&uc->dev_head))
return 0;
*devp = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
return 0;
}
int uclass_find_next_device(struct udevice **devp)
{
struct udevice *dev = *devp;
*devp = NULL;
if (list_is_last(&dev->uclass_node, &dev->uclass->dev_head))
return 0;
*devp = list_entry(dev->uclass_node.next, struct udevice, uclass_node);
return 0;
}
int uclass_find_device_by_seq(enum uclass_id id, int seq_or_req_seq,
bool find_req_seq, struct udevice **devp)
{
@ -274,24 +304,12 @@ int uclass_get_device_by_of_offset(enum uclass_id id, int node,
int uclass_first_device(enum uclass_id id, struct udevice **devp)
{
struct uclass *uc;
struct udevice *dev;
int ret;
*devp = NULL;
ret = uclass_get(id, &uc);
if (ret)
return ret;
if (list_empty(&uc->dev_head))
return 0;
dev = list_first_entry(&uc->dev_head, struct udevice, uclass_node);
ret = device_probe(dev);
if (ret)
return ret;
*devp = dev;
return 0;
ret = uclass_find_first_device(id, &dev);
return uclass_get_device_tail(dev, ret, devp);
}
int uclass_next_device(struct udevice **devp)
@ -300,17 +318,8 @@ int uclass_next_device(struct udevice **devp)
int ret;
*devp = NULL;
if (list_is_last(&dev->uclass_node, &dev->uclass->dev_head))
return 0;
dev = list_entry(dev->uclass_node.next, struct udevice,
uclass_node);
ret = device_probe(dev);
if (ret)
return ret;
*devp = dev;
return 0;
ret = uclass_find_next_device(&dev);
return uclass_get_device_tail(dev, ret, devp);
}
int uclass_bind_device(struct udevice *dev)

22
include/dm/uclass-internal.h
View File

@ -23,6 +23,28 @@
*/
int uclass_find_device(enum uclass_id id, int index, struct udevice **devp);
/**
* uclass_find_first_device() - Return the first device in a uclass
* @id: Id number of the uclass
* #devp: Returns pointer to device, or NULL on error
*
* The device is not prepared for use - this is an internal function
*
* @return 0 if OK (found or not found), -1 on error
*/
int uclass_find_first_device(enum uclass_id id, struct udevice **devp);
/**
* uclass_find_next_device() - Return the next device in a uclass
* @devp: On entry, pointer to device to lookup. On exit, returns pointer
* to the next device in the same uclass, or NULL if none
*
* The device is not prepared for use - this is an internal function
*
* @return 0 if OK (found or not found), -1 on error
*/
int uclass_find_next_device(struct udevice **devp);
/**
* uclass_bind_device() - Associate device with a uclass
*