58 lines
1.4 KiB
C
58 lines
1.4 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
|
|
/*
|
|
* Copyright (c) 2013, The Linux Foundation. All rights reserved.
|
|
*/
|
|
|
|
#include <linux/bitops.h>
|
|
#include <linux/export.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/reset-controller.h>
|
|
#include <linux/delay.h>
|
|
|
|
#include "reset.h"
|
|
|
|
static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
|
|
{
|
|
struct qcom_reset_controller *rst = to_qcom_reset_controller(rcdev);
|
|
|
|
rcdev->ops->assert(rcdev, id);
|
|
udelay(rst->reset_map[id].udelay ?: 1); /* use 1 us as default */
|
|
rcdev->ops->deassert(rcdev, id);
|
|
return 0;
|
|
}
|
|
|
|
static int
|
|
qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
|
|
{
|
|
struct qcom_reset_controller *rst;
|
|
const struct qcom_reset_map *map;
|
|
u32 mask;
|
|
|
|
rst = to_qcom_reset_controller(rcdev);
|
|
map = &rst->reset_map[id];
|
|
mask = map->bitmask ? map->bitmask : BIT(map->bit);
|
|
|
|
return regmap_update_bits(rst->regmap, map->reg, mask, mask);
|
|
}
|
|
|
|
static int
|
|
qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
|
|
{
|
|
struct qcom_reset_controller *rst;
|
|
const struct qcom_reset_map *map;
|
|
u32 mask;
|
|
|
|
rst = to_qcom_reset_controller(rcdev);
|
|
map = &rst->reset_map[id];
|
|
mask = map->bitmask ? map->bitmask : BIT(map->bit);
|
|
|
|
return regmap_update_bits(rst->regmap, map->reg, mask, 0);
|
|
}
|
|
|
|
const struct reset_control_ops qcom_reset_ops = {
|
|
.reset = qcom_reset,
|
|
.assert = qcom_reset_assert,
|
|
.deassert = qcom_reset_deassert,
|
|
};
|
|
EXPORT_SYMBOL_GPL(qcom_reset_ops);
|