linux-imx

/*

 * drivers/mfd/si476x-i2c.c -- Core device driver for si476x MFD

 * device

 *

 * Copyright (C) 2012 Innovative Converged Devices(ICD)

 * Copyright (C) 2013 Andrey Smirnov

 *

 * Author: Andrey Smirnov <andrew.smirnov@gmail.com>

 *

 * 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; version 2 of the License.

 *

 * 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/module.h>

​

#include <linux/slab.h>

#include <linux/interrupt.h>

#include <linux/delay.h>

#include <linux/gpio.h>

#include <linux/regulator/consumer.h>

#include <linux/i2c.h>

#include <linux/err.h>

​

#include <linux/mfd/si476x-core.h>

​

#define SI476X_MAX_IO_ERRORS        10

#define SI476X_DRIVER_RDS_FIFO_DEPTH    128

​

/**

 * si476x_core_config_pinmux() - pin function configuration function

 *

 * @core: Core device structure

 *

 * Configure the functions of the pins of the radio chip.

 *

 * The function returns zero in case of succes or negative error code

 * otherwise.

 */

static int si476x_core_config_pinmux(struct si476x_core *core)

{

    int err;

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

    err = si476x_core_cmd_dig_audio_pin_cfg(core,

                        core->pinmux.dclk,

                        core->pinmux.dfs,

                        core->pinmux.dout,

                        core->pinmux.xout);

    if (err < 0) {

        dev_err(&core->client->dev,

            "Failed to configure digital audio pins(err = %d)\n",

            err);

        return err;

    }

​

    err = si476x_core_cmd_zif_pin_cfg(core,

                      core->pinmux.iqclk,

                      core->pinmux.iqfs,