1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
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>
14 static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
16 struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
18 rcdev->ops->assert(rcdev, id);
19 fsleep(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
21 rcdev->ops->deassert(rcdev, id);
26 qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
28 struct qcom_reset_controller *rst;
29 const struct qcom_reset_map *map;
32 rst = to_qcom_reset_controller(rcdev);
33 map = &rst->reset_map[id];
34 mask = map->bitmask ? map->bitmask : BIT(map->bit);
36 return regmap_update_bits(rst->regmap, map->reg, mask, mask);
40 qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
42 struct qcom_reset_controller *rst;
43 const struct qcom_reset_map *map;
46 rst = to_qcom_reset_controller(rcdev);
47 map = &rst->reset_map[id];
48 mask = map->bitmask ? map->bitmask : BIT(map->bit);
50 return regmap_update_bits(rst->regmap, map->reg, mask, 0);
53 const struct reset_control_ops qcom_reset_ops = {
55 .assert = qcom_reset_assert,
56 .deassert = qcom_reset_deassert,
58 EXPORT_SYMBOL_GPL(qcom_reset_ops);