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linux/sound/soc/codecs/ak4535.c
Liam Girdwood f0fba2ad1b ASoC: multi-component - ASoC Multi-Component Support 
This patch extends the ASoC API to allow sound cards to have more than one
CODEC and more than one platform DMA controller. This is achieved by dividing
some current ASoC structures that contain both driver data and device data into
structures that only either contain device data or driver data. i.e.

 struct snd_soc_codec    --->  struct snd_soc_codec (device data)
                          +->  struct snd_soc_codec_driver (driver data)

 struct snd_soc_platform --->  struct snd_soc_platform (device data)
                          +->  struct snd_soc_platform_driver (driver data)

 struct snd_soc_dai      --->  struct snd_soc_dai (device data)
                          +->  struct snd_soc_dai_driver (driver data)

 struct snd_soc_device   --->  deleted

This now allows ASoC to be more tightly aligned with the Linux driver model and
also means that every ASoC codec, platform and (platform) DAI is a kernel
device. ASoC component private data is now stored as device private data.

The ASoC sound card struct snd_soc_card has also been updated to store lists
of it's components rather than a pointer to a codec and platform. The PCM
runtime struct soc_pcm_runtime now has pointers to all its components.

This patch adds DAPM support for ASoC multi-component and removes struct
snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec
or runtime PCM level basis rather than using snd_soc_socdev.

Other notable multi-component changes:-

 * Stream operations now de-reference less structures.
 * close_delayed work() now runs on a DAI basis rather than looping all DAIs
   in a card.
 * PM suspend()/resume() operations can now handle N CODECs and Platforms
   per sound card.
 * Added soc_bind_dai_link() to bind the component devices to the sound card.
 * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove
   DAI link components.
 * sysfs entries can now be registered per component per card.
 * snd_soc_new_pcms() functionailty rolled into dai_link_probe().
 * snd_soc_register_codec() now does all the codec list and mutex init.

This patch changes the probe() and remove() of the CODEC drivers as follows:-

 o Make CODEC driver a platform driver
 o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core.
 o Removed all static codec pointers (drivers now support > 1 codec dev)
 o snd_soc_register_pcms() now done by core.
 o snd_soc_register_dai() folded into snd_soc_register_codec().

CS4270 portions:
Acked-by: Timur Tabi <timur@freescale.com>

Some TLV320aic23 and Cirrus platform fixes.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>

TI CODEC and OMAP fixes
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>

Samsung platform and misc fixes :-
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>

MPC8610 and PPC fixes.
Signed-off-by: Timur Tabi <timur@freescale.com>

i.MX fixes and some core fixes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

J4740 platform fixes:-
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

CC: Tony Lindgren <tony@atomide.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Kevin Hilman <khilman@deeprootsystems.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC: Kuninori Morimoto <morimoto.kuninori@renesas.com>
CC: Daniel Gloeckner <dg@emlix.com>
CC: Manuel Lauss <mano@roarinelk.homelinux.net>
CC: Mike Frysinger <vapier.adi@gmail.com>
CC: Arnaud Patard <apatard@mandriva.com>
CC: Wan ZongShun <mcuos.com@gmail.com>

Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12 14:00:00 +01:00

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/*
* ak4535.c -- AK4535 ALSA Soc Audio driver
*
* Copyright 2005 Openedhand Ltd.
*
* Author: Richard Purdie <richard@openedhand.com>
*
* Based on wm8753.c by Liam Girdwood
*
* 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.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include "ak4535.h"
#define AK4535_VERSION "0.3"
/* codec private data */
struct ak4535_priv {
unsigned int sysclk;
enum snd_soc_control_type control_type;
void *control_data;
};
/*
* ak4535 register cache
*/
static const u16 ak4535_reg[AK4535_CACHEREGNUM] = {
0x0000, 0x0080, 0x0000, 0x0003,
0x0002, 0x0000, 0x0011, 0x0001,
0x0000, 0x0040, 0x0036, 0x0010,
0x0000, 0x0000, 0x0057, 0x0000,
};
/*
* read ak4535 register cache
*/
static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec,
unsigned int reg)
{
u16 *cache = codec->reg_cache;
if (reg >= AK4535_CACHEREGNUM)
return -1;
return cache[reg];
}
/*
* write ak4535 register cache
*/
static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec,
u16 reg, unsigned int value)
{
u16 *cache = codec->reg_cache;
if (reg >= AK4535_CACHEREGNUM)
return;
cache[reg] = value;
}
/*
* write to the AK4535 register space
*/
static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg,
unsigned int value)
{
u8 data[2];
/* data is
* D15..D8 AK4535 register offset
* D7...D0 register data
*/
data[0] = reg & 0xff;
data[1] = value & 0xff;
ak4535_write_reg_cache(codec, reg, value);
if (codec->hw_write(codec->control_data, data, 2) == 2)
return 0;
else
return -EIO;
}
static int ak4535_sync(struct snd_soc_codec *codec)
{
u16 *cache = codec->reg_cache;
int i, r = 0;
for (i = 0; i < AK4535_CACHEREGNUM; i++)
r |= ak4535_write(codec, i, cache[i]);
return r;
};
static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"};
static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"};
static const char *ak4535_hp_out[] = {"Stereo", "Mono"};
static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"};
static const char *ak4535_mic_select[] = {"Internal", "External"};
static const struct soc_enum ak4535_enum[] = {
SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain),
SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out),
SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out),
SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp),
SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select),
};
static const struct snd_kcontrol_new ak4535_snd_controls[] = {
SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0),
SOC_ENUM("Mono 1 Output", ak4535_enum[1]),
SOC_ENUM("Mono 1 Gain", ak4535_enum[0]),
SOC_ENUM("Headphone Output", ak4535_enum[2]),
SOC_ENUM("Playback Deemphasis", ak4535_enum[3]),
SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0),
SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0),
SOC_ENUM("Mic Select", ak4535_enum[4]),
SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0),
SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0),
SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0),
SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0),
SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0),
SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0),
SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0),
SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1),
SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1),
SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0),
SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0),
};
/* Mono 1 Mixer */
static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0),
SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0),
};
/* Stereo Mixer */
static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0),
SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0),
SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0),
};
/* Input Mixer */
static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0),
SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0),
};
/* Input mux */
static const struct snd_kcontrol_new ak4535_input_mux_control =
SOC_DAPM_ENUM("Input Select", ak4535_enum[4]);
/* HP L switch */
static const struct snd_kcontrol_new ak4535_hpl_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1);
/* HP R switch */
static const struct snd_kcontrol_new ak4535_hpr_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1);
/* mono 2 switch */
static const struct snd_kcontrol_new ak4535_mono2_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0);
/* Line out switch */
static const struct snd_kcontrol_new ak4535_line_control =
SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0);
/* ak4535 dapm widgets */
static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
&ak4535_stereo_mixer_controls[0],
ARRAY_SIZE(ak4535_stereo_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
&ak4535_mono1_mixer_controls[0],
ARRAY_SIZE(ak4535_mono1_mixer_controls)),
SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
&ak4535_input_mixer_controls[0],
ARRAY_SIZE(ak4535_input_mixer_controls)),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
&ak4535_input_mux_control),
SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0),
SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
&ak4535_mono2_control),
/* speaker powersave bit */
SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0),
SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0,
&ak4535_line_control),
SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0,
&ak4535_hpl_control),
SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0,
&ak4535_hpr_control),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("HPR"),
SND_SOC_DAPM_OUTPUT("SPP"),
SND_SOC_DAPM_OUTPUT("SPN"),
SND_SOC_DAPM_OUTPUT("MOUT1"),
SND_SOC_DAPM_OUTPUT("MOUT2"),
SND_SOC_DAPM_OUTPUT("MICOUT"),
SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0),
SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0),
SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0),
SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0),
SND_SOC_DAPM_INPUT("MICIN"),
SND_SOC_DAPM_INPUT("MICEXT"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_INPUT("MIN"),
SND_SOC_DAPM_INPUT("AIN"),
};
static const struct snd_soc_dapm_route audio_map[] = {
/*stereo mixer */
{"Stereo Mixer", "Playback Switch", "DAC"},
{"Stereo Mixer", "Mic Sidetone Switch", "Mic"},
{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
/* mono1 mixer */
{"Mono1 Mixer", "Mic Sidetone Switch", "Mic"},
{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
/* Mic */
{"Mic", NULL, "AIN"},
{"Input Mux", "Internal", "Mic Int Bias"},
{"Input Mux", "External", "Mic Ext Bias"},
{"Mic Int Bias", NULL, "MICIN"},
{"Mic Ext Bias", NULL, "MICEXT"},
{"MICOUT", NULL, "Input Mux"},
/* line out */
{"LOUT", NULL, "Line Out Enable"},
{"ROUT", NULL, "Line Out Enable"},
{"Line Out Enable", "Switch", "Line Out"},
{"Line Out", NULL, "Stereo Mixer"},
/* mono1 out */
{"MOUT1", NULL, "Mono Out"},
{"Mono Out", NULL, "Mono1 Mixer"},
/* left HP */
{"HPL", NULL, "Left HP Enable"},
{"Left HP Enable", "Switch", "HP L Amp"},
{"HP L Amp", NULL, "Stereo Mixer"},
/* right HP */
{"HPR", NULL, "Right HP Enable"},
{"Right HP Enable", "Switch", "HP R Amp"},
{"HP R Amp", NULL, "Stereo Mixer"},
/* speaker */
{"SPP", NULL, "Speaker Enable"},
{"SPN", NULL, "Speaker Enable"},
{"Speaker Enable", "Switch", "Spk Amp"},
{"Spk Amp", NULL, "MIN"},
/* mono 2 */
{"MOUT2", NULL, "Mono 2 Enable"},
{"Mono 2 Enable", "Switch", "Stereo Mixer"},
/* Aux In */
{"Aux In", NULL, "AUX"},
/* ADC */
{"ADC", NULL, "Input Mixer"},
{"Input Mixer", "Mic Capture Switch", "Mic"},
{"Input Mixer", "Aux Capture Switch", "Aux In"},
};
static int ak4535_add_widgets(struct snd_soc_codec *codec)
{
snd_soc_dapm_new_controls(codec, ak4535_dapm_widgets,
ARRAY_SIZE(ak4535_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
return 0;
}
static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
ak4535->sysclk = freq;
return 0;
}
static int ak4535_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5);
int rate = params_rate(params), fs = 256;
if (rate)
fs = ak4535->sysclk / rate;
/* set fs */
switch (fs) {
case 1024:
mode2 |= (0x2 << 5);
break;
case 512:
mode2 |= (0x1 << 5);
break;
case 256:
break;
}
/* set rate */
ak4535_write(codec, AK4535_MODE2, mode2);
return 0;
}
static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u8 mode1 = 0;
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
mode1 = 0x0002;
break;
case SND_SOC_DAIFMT_LEFT_J:
mode1 = 0x0001;
break;
default:
return -EINVAL;
}
/* use 32 fs for BCLK to save power */
mode1 |= 0x4;
ak4535_write(codec, AK4535_MODE1, mode1);
return 0;
}
static int ak4535_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
if (!mute)
ak4535_write(codec, AK4535_DAC, mute_reg);
else
ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
return 0;
}
static int ak4535_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 i, mute_reg;
switch (level) {
case SND_SOC_BIAS_ON:
mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
ak4535_write(codec, AK4535_DAC, mute_reg);
break;
case SND_SOC_BIAS_PREPARE:
mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC) & 0xffdf;
ak4535_write(codec, AK4535_DAC, mute_reg | 0x20);
break;
case SND_SOC_BIAS_STANDBY:
i = ak4535_read_reg_cache(codec, AK4535_PM1);
ak4535_write(codec, AK4535_PM1, i | 0x80);
i = ak4535_read_reg_cache(codec, AK4535_PM2);
ak4535_write(codec, AK4535_PM2, i & (~0x80));
break;
case SND_SOC_BIAS_OFF:
i = ak4535_read_reg_cache(codec, AK4535_PM1);
ak4535_write(codec, AK4535_PM1, i & (~0x80));
break;
}
codec->bias_level = level;
return 0;
}
#define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000)
static struct snd_soc_dai_ops ak4535_dai_ops = {
.hw_params = ak4535_hw_params,
.set_fmt = ak4535_set_dai_fmt,
.digital_mute = ak4535_mute,
.set_sysclk = ak4535_set_dai_sysclk,
};
static struct snd_soc_dai_driver ak4535_dai = {
.name = "ak4535-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = AK4535_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = AK4535_RATES,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.ops = &ak4535_dai_ops,
};
static int ak4535_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int ak4535_resume(struct snd_soc_codec *codec)
{
ak4535_sync(codec);
ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int ak4535_probe(struct snd_soc_codec *codec)
{
struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec);
printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION);
codec->control_data = ak4535->control_data;
/* power on device */
ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
snd_soc_add_controls(codec, ak4535_snd_controls,
ARRAY_SIZE(ak4535_snd_controls));
ak4535_add_widgets(codec);
return 0;
}
/* power down chip */
static int ak4535_remove(struct snd_soc_codec *codec)
{
ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_ak4535 = {
.probe = ak4535_probe,
.remove = ak4535_remove,
.suspend = ak4535_suspend,
.resume = ak4535_resume,
.read = ak4535_read_reg_cache,
.write = ak4535_write,
.set_bias_level = ak4535_set_bias_level,
.reg_cache_size = ARRAY_SIZE(ak4535_reg),
.reg_word_size = sizeof(u8),
.reg_cache_default = ak4535_reg,
};
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int ak4535_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct ak4535_priv *ak4535;
int ret;
ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL);
if (ak4535 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, ak4535);
ak4535->control_data = i2c;
ak4535->control_type = SND_SOC_I2C;
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_ak4535, &ak4535_dai, 1);
if (ret < 0)
kfree(ak4535);
return ret;
}
static __devexit int ak4535_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
kfree(i2c_get_clientdata(client));
return 0;
}
static const struct i2c_device_id ak4535_i2c_id[] = {
{ "ak4535", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id);
static struct i2c_driver ak4535_i2c_driver = {
.driver = {
.name = "ak4535-codec",
.owner = THIS_MODULE,
},
.probe = ak4535_i2c_probe,
.remove = __devexit_p(ak4535_i2c_remove),
.id_table = ak4535_i2c_id,
};
#endif
static int __init ak4535_modinit(void)
{
int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&ak4535_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register AK4535 I2C driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(ak4535_modinit);
static void __exit ak4535_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&ak4535_i2c_driver);
#endif
}
module_exit(ak4535_exit);
MODULE_DESCRIPTION("Soc AK4535 driver");
MODULE_AUTHOR("Richard Purdie");
MODULE_LICENSE("GPL");
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