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core: add uclass_get_device_by_phandle_id() api

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Add api for who can not get phandle from a device property.

Signed-off-by: Kever Yang <kever.yang@rock-chips.com>
Reviewed-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
This commit is contained in:
Kever Yang 2018-02-09 10:56:23 +08:00 committed by Simon Glass
parent 81cf7c8d45
commit d255fade66
2 changed files with 42 additions and 0 deletions
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26
drivers/core/uclass.c
View File

@ -457,6 +457,32 @@ int uclass_get_device_by_ofnode(enum uclass_id id, ofnode node,
}
#if CONFIG_IS_ENABLED(OF_CONTROL)
int uclass_get_device_by_phandle_id(enum uclass_id id, uint phandle_id,
struct udevice **devp)
{
struct udevice *dev;
struct uclass *uc;
int ret;
*devp = NULL;
ret = uclass_get(id, &uc);
if (ret)
return ret;
list_for_each_entry(dev, &uc->dev_head, uclass_node) {
uint phandle;
phandle = dev_read_phandle(dev);
if (phandle == phandle_id) {
*devp = dev;
return uclass_get_device_tail(dev, ret, devp);
}
}
return -ENODEV;
}
int uclass_get_device_by_phandle(enum uclass_id id, struct udevice *parent,
const char *name, struct udevice **devp)
{

16
include/dm/uclass.h
View File

@ -210,6 +210,22 @@ int uclass_get_device_by_of_offset(enum uclass_id id, int node,
int uclass_get_device_by_ofnode(enum uclass_id id, ofnode node,
struct udevice **devp);
/**
* uclass_get_device_by_phandle_id() - Get a uclass device by phandle id
*
* This searches the devices in the uclass for one with the given phandle id.
*
* The device is probed to activate it ready for use.
*
* @id: uclass ID to look up
* @phandle_id: the phandle id to look up
* @devp: Returns pointer to device (there is only one for each node)
* @return 0 if OK, -ENODEV if there is no device match the phandle, other
* -ve on error
*/
int uclass_get_device_by_phandle_id(enum uclass_id id, uint phandle_id,
struct udevice **devp);
/**
* uclass_get_device_by_phandle() - Get a uclass device by phandle
*