linux-imx

/*

 * MFD driver for twl4030 audio submodule, which contains an audio codec, and

 * the vibra control.

 *

 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>

 *

 * Copyright:   (C) 2009 Nokia Corporation

 *

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

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 *

 * 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 St, Fifth Floor, Boston, MA

 * 02110-1301 USA

 *

 */

​

#include <linux/module.h>

#include <linux/types.h>

#include <linux/slab.h>

#include <linux/kernel.h>

#include <linux/fs.h>

#include <linux/platform_device.h>

#include <linux/of.h>

#include <linux/of_platform.h>

#include <linux/mfd/twl.h>

#include <linux/mfd/core.h>

#include <linux/mfd/twl4030-audio.h>

​

#define TWL4030_AUDIO_CELLS 2

​

static struct platform_device *twl4030_audio_dev;

​

struct twl4030_audio_resource {

    int request_count;

    u8 reg;

    u8 mask;

};

​

struct twl4030_audio {

    unsigned int audio_mclk;

    struct mutex mutex;

    struct twl4030_audio_resource resource[TWL4030_AUDIO_RES_MAX];

    struct mfd_cell cells[TWL4030_AUDIO_CELLS];

};

​

/*

 * Modify the resource, the function returns the content of the register

 * after the modification.

 */

static int twl4030_audio_set_resource(enum twl4030_audio_res id, int enable)

{

    struct twl4030_audio *audio = platform_get_drvdata(twl4030_audio_dev);

    u8 val;

​

    twl_i2c_read_u8(TWL4030_MODULE_AUDIO_VOICE, &val,