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/*
* Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 and
* only version 2 as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include <linux/err.h>
#include <linux/of.h>
#include "dbm.h"
struct dbm_manager {
struct list_head dbm_list;
};
static struct dbm_manager dbm_manager = {
.dbm_list = LIST_HEAD_INIT(dbm_manager.dbm_list)
};
static struct dbm *of_usb_find_dbm(struct device_node *node)
{
struct dbm *dbm;
list_for_each_entry(dbm, &dbm_manager.dbm_list, head) {
if (node != dbm->dev->of_node)
continue;
return dbm;
}
return ERR_PTR(-ENODEV);
}
struct dbm *usb_get_dbm_by_phandle(struct device *dev,
const char *phandle, u8 index)
{
struct device_node *node;
if (!dev->of_node) {
dev_dbg(dev, "device does not have a device node entry\n");
return ERR_PTR(-EINVAL);
}
node = of_parse_phandle(dev->of_node, phandle, index);
if (!node) {
dev_dbg(dev, "failed to get %s phandle in %s node\n", phandle,
dev->of_node->full_name);
return ERR_PTR(-ENODEV);
}
return of_usb_find_dbm(node);
}
EXPORT_SYMBOL(usb_get_dbm_by_phandle);
int usb_add_dbm(struct dbm *x)
{
list_add_tail(&x->head, &dbm_manager.dbm_list);
return 0;
}
EXPORT_SYMBOL(usb_add_dbm);
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