linux-imx

/*

 * drivers/reset/reset-oxnas.c

 *

 * Copyright (C) 2016 Neil Armstrong <narmstrong@baylibre.com>

 * Copyright (C) 2014 Ma Haijun <mahaijuns@gmail.com>

 * Copyright (C) 2009 Oxford Semiconductor Ltd

 *

 * This program is free software; you can redistribute it and/or modify it

 * under the terms and conditions of the GNU General Public License,

 * version 2, as published by the Free Software Foundation.

 *

 * This program is distributed in the hope 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.

 *

 * You should have received a copy of the GNU General Public License

 * along with this program.  If not, see <http://www.gnu.org/licenses/>.

 */

#include <linux/err.h>

#include <linux/init.h>

#include <linux/of.h>

#include <linux/platform_device.h>

#include <linux/reset-controller.h>

#include <linux/slab.h>

#include <linux/delay.h>

#include <linux/types.h>

#include <linux/regmap.h>

#include <linux/mfd/syscon.h>

​

/* Regmap offsets */

#define RST_SET_REGOFFSET   0x34

#define RST_CLR_REGOFFSET   0x38

​

struct oxnas_reset {

    struct regmap *regmap;

    struct reset_controller_dev rcdev;

};

​

static int oxnas_reset_reset(struct reset_controller_dev *rcdev,

                  unsigned long id)

{

    struct oxnas_reset *data =

        container_of(rcdev, struct oxnas_reset, rcdev);

​

    regmap_write(data->regmap, RST_SET_REGOFFSET, BIT(id));

    msleep(50);

    regmap_write(data->regmap, RST_CLR_REGOFFSET, BIT(id));

​

    return 0;

}

​

static int oxnas_reset_assert(struct reset_controller_dev *rcdev,

                  unsigned long id)

{

    struct oxnas_reset *data =

        container_of(rcdev, struct oxnas_reset, rcdev);

​

    regmap_write(data->regmap, RST_SET_REGOFFSET, BIT(id));

​

    return 0;

}

​