blob: 6c977d3a8590674ff97fb81962ba3fccc33ce3a6 [file] [log] [blame]
Stephen Boydb36ba302014-01-15 10:47:27 -08001/*
2 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
3 *
4 * This software is licensed under the terms of the GNU General Public
5 * License version 2, as published by the Free Software Foundation, and
6 * may be copied, distributed, and modified under those terms.
7 *
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
12 */
13
14#include <linux/bitops.h>
15#include <linux/export.h>
16#include <linux/regmap.h>
17#include <linux/reset-controller.h>
18#include <linux/delay.h>
19
20#include "reset.h"
21
22static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
23{
24 rcdev->ops->assert(rcdev, id);
25 udelay(1);
26 rcdev->ops->deassert(rcdev, id);
27 return 0;
28}
29
30static int
31qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
32{
33 struct qcom_reset_controller *rst;
34 const struct qcom_reset_map *map;
35 u32 mask;
36
37 rst = to_qcom_reset_controller(rcdev);
38 map = &rst->reset_map[id];
39 mask = BIT(map->bit);
40
41 return regmap_update_bits(rst->regmap, map->reg, mask, mask);
42}
43
44static int
45qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
46{
47 struct qcom_reset_controller *rst;
48 const struct qcom_reset_map *map;
49 u32 mask;
50
51 rst = to_qcom_reset_controller(rcdev);
52 map = &rst->reset_map[id];
53 mask = BIT(map->bit);
54
55 return regmap_update_bits(rst->regmap, map->reg, mask, 0);
56}
57
58struct reset_control_ops qcom_reset_ops = {
59 .reset = qcom_reset,
60 .assert = qcom_reset_assert,
61 .deassert = qcom_reset_deassert,
62};
63EXPORT_SYMBOL_GPL(qcom_reset_ops);