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(usecs: 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(map: rst->regmap, reg: map->reg, mask, val: 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(map: rst->regmap, reg: map->reg, mask, val: 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);
59

source code of linux/drivers/clk/qcom/reset.c