1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
 4 */
 5
 6#include <linux/bitops.h>
 7#include <linux/export.h>
 8#include <linux/regmap.h>
 9#include <linux/reset-controller.h>
10#include <linux/delay.h>
11
12#include "reset.h"
13
14static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
15{
16	struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
17
18	rcdev->ops->assert(rcdev, id);
19	udelay(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
20	rcdev->ops->deassert(rcdev, id);
21	return 0;
22}
23
24static int
25qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
26{
27	struct qcom_reset_controller *rst;
28	const struct qcom_reset_map *map;
29	u32 mask;
30
31	rst = to_qcom_reset_controller(rcdev);
32	map = &rst->reset_map[id];
33	mask = map->bitmask ? map->bitmask : BIT(map->bit);
34
35	return regmap_update_bits(rst->regmap, map->reg, mask, mask);
36}
37
38static int
39qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
40{
41	struct qcom_reset_controller *rst;
42	const struct qcom_reset_map *map;
43	u32 mask;
44
45	rst = to_qcom_reset_controller(rcdev);
46	map = &rst->reset_map[id];
47	mask = map->bitmask ? map->bitmask : BIT(map->bit);
48
49	return regmap_update_bits(rst->regmap, map->reg, mask, 0);
50}
51
52const struct reset_control_ops qcom_reset_ops = {
53	.reset = qcom_reset,
54	.assert = qcom_reset_assert,
55	.deassert = qcom_reset_deassert,
56};
57EXPORT_SYMBOL_GPL(qcom_reset_ops);