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