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	fsleep(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
20
21	rcdev->ops->deassert(rcdev, id);
22	return 0;
23}
24
25static int
26qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
27{
28	struct qcom_reset_controller *rst;
29	const struct qcom_reset_map *map;
30	u32 mask;
31
32	rst = to_qcom_reset_controller(rcdev);
33	map = &rst->reset_map[id];
34	mask = map->bitmask ? map->bitmask : BIT(map->bit);
35
36	return regmap_update_bits(rst->regmap, map->reg, mask, mask);
37}
38
39static int
40qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
41{
42	struct qcom_reset_controller *rst;
43	const struct qcom_reset_map *map;
44	u32 mask;
45
46	rst = to_qcom_reset_controller(rcdev);
47	map = &rst->reset_map[id];
48	mask = map->bitmask ? map->bitmask : BIT(map->bit);
49
50	return regmap_update_bits(rst->regmap, map->reg, mask, 0);
51}
52
53const struct reset_control_ops qcom_reset_ops = {
54	.reset = qcom_reset,
55	.assert = qcom_reset_assert,
56	.deassert = qcom_reset_deassert,
57};
58EXPORT_SYMBOL_GPL(qcom_reset_ops);