[deliverable/linux.git] / drivers / clk / qcom / reset.c

/*
 * Copyright (c) 2013, The Linux Foundation. All rights reserved.
 *
 * This software is licensed under the terms of the GNU General Public
 * License version 2, as published by the Free Software Foundation, and
 * may be copied, distributed, and modified under those terms.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 */

#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)
{
	rcdev->ops->assert(rcdev, id);
	udelay(1);
	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 = 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 = BIT(map->bit);

	return regmap_update_bits(rst->regmap, map->reg, mask, 0);
}

struct reset_control_ops qcom_reset_ops = {
	.reset = qcom_reset,
	.assert = qcom_reset_assert,
	.deassert = qcom_reset_deassert,
};
EXPORT_SYMBOL_GPL(qcom_reset_ops);
Commit	Line	Data
b36ba30c SB	1	/*
	2	* Copyright (c) 2013, The Linux Foundation. All rights reserved.
	3	*
	4	* This software is licensed under the terms of the GNU General Public
	5	* License version 2, as published by the Free Software Foundation, and
	6	* may be copied, distributed, and modified under those terms.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*/
	13
	14	#include <linux/bitops.h>
	15	#include <linux/export.h>
	16	#include <linux/regmap.h>
	17	#include <linux/reset-controller.h>
	18	#include <linux/delay.h>
	19
	20	#include "reset.h"
	21
	22	static int qcom_reset(struct reset_controller_dev *rcdev, unsigned long id)
	23	{
	24	rcdev->ops->assert(rcdev, id);
	25	udelay(1);
	26	rcdev->ops->deassert(rcdev, id);
	27	return 0;
	28	}
	29
	30	static int
	31	qcom_reset_assert(struct reset_controller_dev *rcdev, unsigned long id)
	32	{
	33	struct qcom_reset_controller *rst;
	34	const struct qcom_reset_map *map;
	35	u32 mask;
	36
	37	rst = to_qcom_reset_controller(rcdev);
	38	map = &rst->reset_map[id];
	39	mask = BIT(map->bit);
	40
	41	return regmap_update_bits(rst->regmap, map->reg, mask, mask);
	42	}
	43
	44	static int
	45	qcom_reset_deassert(struct reset_controller_dev *rcdev, unsigned long id)
	46	{
	47	struct qcom_reset_controller *rst;
	48	const struct qcom_reset_map *map;
	49	u32 mask;
	50
	51	rst = to_qcom_reset_controller(rcdev);
	52	map = &rst->reset_map[id];
	53	mask = BIT(map->bit);
	54
	55	return regmap_update_bits(rst->regmap, map->reg, mask, 0);
	56	}
	57
	58	struct reset_control_ops qcom_reset_ops = {
	59	.reset = qcom_reset,
	60	.assert = qcom_reset_assert,
	61	.deassert = qcom_reset_deassert,
	62	};
	63	EXPORT_SYMBOL_GPL(qcom_reset_ops);