linux-imx

/*

 * Elonics E4000 silicon tuner driver

 *

 * Copyright (C) 2012 Antti Palosaari <crope@iki.fi>

 *

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

 *    it under the terms of the GNU General Public License as published by

 *    the Free Software Foundation; either version 2 of the License, or

 *    (at your option) any later version.

 *

 *    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.

 *

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

 *    with this program; if not, write to the Free Software Foundation, Inc.,

 *    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.

 */

​

#include "e4000_priv.h"

​

static int e4000_init(struct e4000_dev *dev)

{

    struct i2c_client *client = dev->client;

    int ret;

​

    dev_dbg(&client->dev, "\n");

​

    /* reset */

    ret = regmap_write(dev->regmap, 0x00, 0x01);

    if (ret)

        goto err;

​

    /* disable output clock */

    ret = regmap_write(dev->regmap, 0x06, 0x00);

    if (ret)

        goto err;

​

    ret = regmap_write(dev->regmap, 0x7a, 0x96);

    if (ret)

        goto err;

​

    /* configure gains */

    ret = regmap_bulk_write(dev->regmap, 0x7e, "\x01\xfe", 2);

    if (ret)

        goto err;

​

    ret = regmap_write(dev->regmap, 0x82, 0x00);

    if (ret)

        goto err;

​

    ret = regmap_write(dev->regmap, 0x24, 0x05);

    if (ret)

        goto err;

​

    ret = regmap_bulk_write(dev->regmap, 0x87, "\x20\x01", 2);

    if (ret)

        goto err;

​

    ret = regmap_bulk_write(dev->regmap, 0x9f, "\x7f\x07", 2);

    if (ret)

        goto err;

​

    /* DC offset control */

    ret = regmap_write(dev->regmap, 0x2d, 0x1f);

    if (ret)

        goto err;

​

    ret = regmap_bulk_write(dev->regmap, 0x70, "\x01\x01", 2);

    if (ret)

        goto err;

​

    /* gain control */

    ret = regmap_write(dev->regmap, 0x1a, 0x17);

    if (ret)

        goto err;

​

    ret = regmap_write(dev->regmap, 0x1f, 0x1a);

    if (ret)

        goto err;

​

    dev->active = true;

​

    return 0;

err:

    dev_dbg(&client->dev, "failed=%d\n", ret);

    return ret;

}

​

static int e4000_sleep(struct e4000_dev *dev)

{