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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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17
include/dm/uclass.h
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@ -10,6 +10,7 @@
#ifndef _DM_UCLASS_H
#define _DM_UCLASS_H
#include <dm/ofnode.h>
#include <dm/uclass-id.h>
#include <linker_lists.h>
#include <linux/list.h>
@ -185,6 +186,22 @@ 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
*