LXR linux/drivers/clk/qcom/reset.c

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