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dm: core: Allow finding children / uclasses by partial name

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In some cases it is useful to search just by a partial name, such as
when looking for a sibling device that has a common name substring. Add
helper functions to handle these requirements.

Signed-off-by: Simon Glass <sjg@chromium.org>
This commit is contained in:
Simon Glass 2021-10-23 17:26:08 -06:00
parent 075bfc9575
commit 4b030177b6
4 changed files with 38 additions and 5 deletions
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13
drivers/core/device.c
View file

@ -902,15 +902,16 @@ int device_find_first_child_by_uclass(const struct udevice *parent,
return -ENODEV;
}
int device_find_child_by_name(const struct udevice *parent, const char *name,
struct udevice **devp)
int device_find_child_by_namelen(const struct udevice *parent, const char *name,
int len, struct udevice **devp)
{
struct udevice *dev;
*devp = NULL;
list_for_each_entry(dev, &parent->child_head, sibling_node) {
if (!strcmp(dev->name, name)) {
if (!strncmp(dev->name, name, len) &&
strlen(dev->name) == len) {
*devp = dev;
return 0;
}
@ -919,6 +920,12 @@ int device_find_child_by_name(const struct udevice *parent, const char *name,
return -ENODEV;
}
int device_find_child_by_name(const struct udevice *parent, const char *name,
struct udevice **devp)
{
return device_find_child_by_namelen(parent, name, strlen(name), devp);
}
int device_first_child_err(struct udevice *parent, struct udevice **devp)
{
struct udevice *dev;

9
drivers/core/uclass.c
View file

@ -180,20 +180,25 @@ void uclass_set_priv(struct uclass *uc, void *priv)
uc->priv_ = priv;
}
enum uclass_id uclass_get_by_name(const char *name)
enum uclass_id uclass_get_by_name_len(const char *name, int len)
{
int i;
for (i = 0; i < UCLASS_COUNT; i++) {
struct uclass_driver *uc_drv = lists_uclass_lookup(i);
if (uc_drv && !strcmp(uc_drv->name, name))
if (uc_drv && !strncmp(uc_drv->name, name, len))
return i;
}
return UCLASS_INVALID;
}
enum uclass_id uclass_get_by_name(const char *name)
{
return uclass_get_by_name_len(name, strlen(name));
}
int dev_get_uclass_index(struct udevice *dev, struct uclass **ucp)
{
struct udevice *iter;

12
include/dm/device.h
View file

@ -758,6 +758,18 @@ int device_find_first_child_by_uclass(const struct udevice *parent,
enum uclass_id uclass_id,
struct udevice **devp);
/**
* device_find_child_by_name() - Find a child by device name
*
* @parent: Parent device to search
* @name: Name to look for
* @len: Length of the name
* @devp: Returns device found, if any
* @return 0 if found, else -ENODEV
*/
int device_find_child_by_namelen(const struct udevice *parent, const char *name,
int len, struct udevice **devp);
/**
* device_find_child_by_name() - Find a child by device name
*

9
include/dm/uclass.h
View file

@ -172,6 +172,15 @@ int uclass_get(enum uclass_id key, struct uclass **ucp);
*/
const char *uclass_get_name(enum uclass_id id);
/**
* uclass_get_by_name() - Look up a uclass by its driver name
*
* @name: Name to look up
* @len: Length of name
* @returns the associated uclass ID, or UCLASS_INVALID if not found
*/
enum uclass_id uclass_get_by_name_len(const char *name, int len);
/**
* uclass_get_by_name() - Look up a uclass by its driver name
*