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linux-stable/sound/soc/codecs/ak4641.c
Mark Brown 253322c188 ASoC: ak4641: Push GPIO allocation out into the I2C probe 
It's more idiomatic to do this and it means we don't try to bring up the
card if the CODEC didn't manage to bind successfully.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-04-01 11:28:21 +01:00

652 lines
18 KiB
C
Raw Blame History

/*
* ak4641.c -- AK4641 ALSA Soc Audio driver
*
* Copyright (C) 2008 Harald Welte <laforge@gnufiish.org>
* Copyright (C) 2011 Dmitry Artamonow <mad_soft@inbox.ru>
*
* Based on ak4535.c by Richard Purdie
*
* 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/init.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include <sound/ak4641.h>
#include "ak4641.h"
/* codec private data */
struct ak4641_priv {
unsigned int sysclk;
int deemph;
int playback_fs;
};
/*
* ak4641 register cache
*/
static const u8 ak4641_reg[AK4641_CACHEREGNUM] = {
0x00, 0x80, 0x00, 0x80,
0x02, 0x00, 0x11, 0x05,
0x00, 0x00, 0x36, 0x10,
0x00, 0x00, 0x57, 0x00,
0x88, 0x88, 0x08, 0x08
};
static const int deemph_settings[] = {44100, 0, 48000, 32000};
static int ak4641_set_deemph(struct snd_soc_codec *codec)
{
struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
int i, best = 0;
for (i = 0 ; i < ARRAY_SIZE(deemph_settings); i++) {
/* if deemphasis is on, select the nearest available rate */
if (ak4641->deemph && deemph_settings[i] != 0 &&
abs(deemph_settings[i] - ak4641->playback_fs) <
abs(deemph_settings[best] - ak4641->playback_fs))
best = i;
if (!ak4641->deemph && deemph_settings[i] == 0)
best = i;
}
dev_dbg(codec->dev, "Set deemphasis %d\n", best);
return snd_soc_update_bits(codec, AK4641_DAC, 0x3, best);
}
static int ak4641_put_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
int deemph = ucontrol->value.enumerated.item[0];
if (deemph > 1)
return -EINVAL;
ak4641->deemph = deemph;
return ak4641_set_deemph(codec);
}
static int ak4641_get_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
ucontrol->value.enumerated.item[0] = ak4641->deemph;
return 0;
};
static const char *ak4641_mono_out[] = {"(L + R)/2", "Hi-Z"};
static const char *ak4641_hp_out[] = {"Stereo", "Mono"};
static const char *ak4641_mic_select[] = {"Internal", "External"};
static const char *ak4641_mic_or_dac[] = {"Microphone", "Voice DAC"};
static const DECLARE_TLV_DB_SCALE(mono_gain_tlv, -1700, 2300, 0);
static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 2000, 0);
static const DECLARE_TLV_DB_SCALE(eq_tlv, -1050, 150, 0);
static const DECLARE_TLV_DB_SCALE(master_tlv, -12750, 50, 0);
static const DECLARE_TLV_DB_SCALE(mic_stereo_sidetone_tlv, -2700, 300, 0);
static const DECLARE_TLV_DB_SCALE(mic_mono_sidetone_tlv, -400, 400, 0);
static const DECLARE_TLV_DB_SCALE(capture_tlv, -800, 50, 0);
static const DECLARE_TLV_DB_SCALE(alc_tlv, -800, 50, 0);
static const DECLARE_TLV_DB_SCALE(aux_in_tlv, -2100, 300, 0);
static const struct soc_enum ak4641_mono_out_enum =
SOC_ENUM_SINGLE(AK4641_SIG1, 6, 2, ak4641_mono_out);
static const struct soc_enum ak4641_hp_out_enum =
SOC_ENUM_SINGLE(AK4641_MODE2, 2, 2, ak4641_hp_out);
static const struct soc_enum ak4641_mic_select_enum =
SOC_ENUM_SINGLE(AK4641_MIC, 1, 2, ak4641_mic_select);
static const struct soc_enum ak4641_mic_or_dac_enum =
SOC_ENUM_SINGLE(AK4641_BTIF, 4, 2, ak4641_mic_or_dac);
static const struct snd_kcontrol_new ak4641_snd_controls[] = {
SOC_ENUM("Mono 1 Output", ak4641_mono_out_enum),
SOC_SINGLE_TLV("Mono 1 Gain Volume", AK4641_SIG1, 7, 1, 1,
mono_gain_tlv),
SOC_ENUM("Headphone Output", ak4641_hp_out_enum),
SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0,
ak4641_get_deemph, ak4641_put_deemph),
SOC_SINGLE_TLV("Mic Boost Volume", AK4641_MIC, 0, 1, 0, mic_boost_tlv),
SOC_SINGLE("ALC Operation Time", AK4641_TIMER, 0, 3, 0),
SOC_SINGLE("ALC Recovery Time", AK4641_TIMER, 2, 3, 0),
SOC_SINGLE("ALC ZC Time", AK4641_TIMER, 4, 3, 0),
SOC_SINGLE("ALC 1 Switch", AK4641_ALC1, 5, 1, 0),
SOC_SINGLE_TLV("ALC Volume", AK4641_ALC2, 0, 71, 0, alc_tlv),
SOC_SINGLE("Left Out Enable Switch", AK4641_SIG2, 1, 1, 0),
SOC_SINGLE("Right Out Enable Switch", AK4641_SIG2, 0, 1, 0),
SOC_SINGLE_TLV("Capture Volume", AK4641_PGA, 0, 71, 0, capture_tlv),
SOC_DOUBLE_R_TLV("Master Playback Volume", AK4641_LATT,
AK4641_RATT, 0, 255, 1, master_tlv),
SOC_SINGLE_TLV("AUX In Volume", AK4641_VOL, 0, 15, 0, aux_in_tlv),
SOC_SINGLE("Equalizer Switch", AK4641_DAC, 2, 1, 0),
SOC_SINGLE_TLV("EQ1 100 Hz Volume", AK4641_EQLO, 0, 15, 1, eq_tlv),
SOC_SINGLE_TLV("EQ2 250 Hz Volume", AK4641_EQLO, 4, 15, 1, eq_tlv),
SOC_SINGLE_TLV("EQ3 1 kHz Volume", AK4641_EQMID, 0, 15, 1, eq_tlv),
SOC_SINGLE_TLV("EQ4 3.5 kHz Volume", AK4641_EQMID, 4, 15, 1, eq_tlv),
SOC_SINGLE_TLV("EQ5 10 kHz Volume", AK4641_EQHI, 0, 15, 1, eq_tlv),
};
/* Mono 1 Mixer */
static const struct snd_kcontrol_new ak4641_mono1_mixer_controls[] = {
SOC_DAPM_SINGLE_TLV("Mic Mono Sidetone Volume", AK4641_VOL, 7, 1, 0,
mic_mono_sidetone_tlv),
SOC_DAPM_SINGLE("Mic Mono Sidetone Switch", AK4641_SIG1, 4, 1, 0),
SOC_DAPM_SINGLE("Mono Playback Switch", AK4641_SIG1, 5, 1, 0),
};
/* Stereo Mixer */
static const struct snd_kcontrol_new ak4641_stereo_mixer_controls[] = {
SOC_DAPM_SINGLE_TLV("Mic Sidetone Volume", AK4641_VOL, 4, 7, 0,
mic_stereo_sidetone_tlv),
SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4641_SIG2, 4, 1, 0),
SOC_DAPM_SINGLE("Playback Switch", AK4641_SIG2, 7, 1, 0),
SOC_DAPM_SINGLE("Aux Bypass Switch", AK4641_SIG2, 5, 1, 0),
};
/* Input Mixer */
static const struct snd_kcontrol_new ak4641_input_mixer_controls[] = {
SOC_DAPM_SINGLE("Mic Capture Switch", AK4641_MIC, 2, 1, 0),
SOC_DAPM_SINGLE("Aux Capture Switch", AK4641_MIC, 5, 1, 0),
};
/* Mic mux */
static const struct snd_kcontrol_new ak4641_mic_mux_control =
SOC_DAPM_ENUM("Mic Select", ak4641_mic_select_enum);
/* Input mux */
static const struct snd_kcontrol_new ak4641_input_mux_control =
SOC_DAPM_ENUM("Input Select", ak4641_mic_or_dac_enum);
/* mono 2 switch */
static const struct snd_kcontrol_new ak4641_mono2_control =
SOC_DAPM_SINGLE("Switch", AK4641_SIG1, 0, 1, 0);
/* ak4641 dapm widgets */
static const struct snd_soc_dapm_widget ak4641_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0,
&ak4641_stereo_mixer_controls[0],
ARRAY_SIZE(ak4641_stereo_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0,
&ak4641_mono1_mixer_controls[0],
ARRAY_SIZE(ak4641_mono1_mixer_controls)),
SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0,
&ak4641_input_mixer_controls[0],
ARRAY_SIZE(ak4641_input_mixer_controls)),
SND_SOC_DAPM_MUX("Mic Mux", SND_SOC_NOPM, 0, 0,
&ak4641_mic_mux_control),
SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0,
&ak4641_input_mux_control),
SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0,
&ak4641_mono2_control),
SND_SOC_DAPM_OUTPUT("LOUT"),
SND_SOC_DAPM_OUTPUT("ROUT"),
SND_SOC_DAPM_OUTPUT("MOUT1"),
SND_SOC_DAPM_OUTPUT("MOUT2"),
SND_SOC_DAPM_OUTPUT("MICOUT"),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", AK4641_PM1, 0, 0),
SND_SOC_DAPM_PGA("Mic", AK4641_PM1, 1, 0, NULL, 0),
SND_SOC_DAPM_PGA("AUX In", AK4641_PM1, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", AK4641_PM1, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("Line Out", AK4641_PM1, 4, 0, NULL, 0),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", AK4641_PM2, 0, 0),
SND_SOC_DAPM_PGA("Mono Out 2", AK4641_PM2, 3, 0, NULL, 0),
SND_SOC_DAPM_ADC("Voice ADC", "Voice Capture", AK4641_BTIF, 0, 0),
SND_SOC_DAPM_DAC("Voice DAC", "Voice Playback", AK4641_BTIF, 1, 0),
SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4641_MIC, 3, 0),
SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4641_MIC, 4, 0),
SND_SOC_DAPM_INPUT("MICIN"),
SND_SOC_DAPM_INPUT("MICEXT"),
SND_SOC_DAPM_INPUT("AUX"),
SND_SOC_DAPM_INPUT("AIN"),
};
static const struct snd_soc_dapm_route ak4641_audio_map[] = {
/* Stereo Mixer */
{"Stereo Mixer", "Playback Switch", "DAC"},
{"Stereo Mixer", "Mic Sidetone Switch", "Input Mux"},
{"Stereo Mixer", "Aux Bypass Switch", "AUX In"},
/* Mono 1 Mixer */
{"Mono1 Mixer", "Mic Mono Sidetone Switch", "Input Mux"},
{"Mono1 Mixer", "Mono Playback Switch", "DAC"},
/* Mic */
{"Mic", NULL, "AIN"},
{"Mic Mux", "Internal", "Mic Int Bias"},
{"Mic Mux", "External", "Mic Ext Bias"},
{"Mic Int Bias", NULL, "MICIN"},
{"Mic Ext Bias", NULL, "MICEXT"},
{"MICOUT", NULL, "Mic Mux"},
/* Input Mux */
{"Input Mux", "Microphone", "Mic"},
{"Input Mux", "Voice DAC", "Voice DAC"},
/* Line Out */
{"LOUT", NULL, "Line Out"},
{"ROUT", NULL, "Line Out"},
{"Line Out", NULL, "Stereo Mixer"},
/* Mono 1 Out */
{"MOUT1", NULL, "Mono Out"},
{"Mono Out", NULL, "Mono1 Mixer"},
/* Mono 2 Out */
{"MOUT2", NULL, "Mono 2 Enable"},
{"Mono 2 Enable", "Switch", "Mono Out 2"},
{"Mono Out 2", NULL, "Stereo Mixer"},
{"Voice ADC", NULL, "Mono 2 Enable"},
/* 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 ak4641_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 ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
ak4641->sysclk = freq;
return 0;
}
static int ak4641_i2s_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 ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec);
int rate = params_rate(params), fs = 256;
u8 mode2;
if (rate)
fs = ak4641->sysclk / rate;
else
return -EINVAL;
/* set fs */
switch (fs) {
case 1024:
mode2 = (0x2 << 5);
break;
case 512:
mode2 = (0x1 << 5);
break;
case 256:
mode2 = (0x0 << 5);
break;
default:
dev_err(codec->dev, "Error: unsupported fs=%d\n", fs);
return -EINVAL;
}
snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2);
/* Update de-emphasis filter for the new rate */
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
ak4641->playback_fs = rate;
ak4641_set_deemph(codec);
};
return 0;
}
static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u8 btif;
int ret;
/* interface format */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
btif = (0x3 << 5);
break;
case SND_SOC_DAIFMT_LEFT_J:
btif = (0x2 << 5);
break;
case SND_SOC_DAIFMT_DSP_A: /* MSB after FRM */
btif = (0x0 << 5);
break;
case SND_SOC_DAIFMT_DSP_B: /* MSB during FRM */
btif = (0x1 << 5);
break;
default:
return -EINVAL;
}
ret = snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif);
if (ret < 0)
return ret;
return 0;
}
static int ak4641_i2s_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 = 0x02;
break;
case SND_SOC_DAIFMT_LEFT_J:
mode1 = 0x01;
break;
default:
return -EINVAL;
}
return snd_soc_write(codec, AK4641_MODE1, mode1);
}
static int ak4641_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0);
}
static int ak4641_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct ak4641_platform_data *pdata = codec->dev->platform_data;
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
/* unmute */
snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0);
break;
case SND_SOC_BIAS_PREPARE:
/* mute */
snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
if (pdata && gpio_is_valid(pdata->gpio_power))
gpio_set_value(pdata->gpio_power, 1);
mdelay(1);
if (pdata && gpio_is_valid(pdata->gpio_npdn))
gpio_set_value(pdata->gpio_npdn, 1);
mdelay(1);
ret = snd_soc_cache_sync(codec);
if (ret) {
dev_err(codec->dev,
"Failed to sync cache: %d\n", ret);
return ret;
}
}
snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80);
snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0);
break;
case SND_SOC_BIAS_OFF:
snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0);
if (pdata && gpio_is_valid(pdata->gpio_npdn))
gpio_set_value(pdata->gpio_npdn, 0);
if (pdata && gpio_is_valid(pdata->gpio_power))
gpio_set_value(pdata->gpio_power, 0);
codec->cache_sync = 1;
break;
}
codec->dapm.bias_level = level;
return 0;
}
#define AK4641_RATES (SNDRV_PCM_RATE_8000_48000)
#define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
SNDRV_PCM_RATE_16000)
#define AK4641_FORMATS (SNDRV_PCM_FMTBIT_S16_LE)
static const struct snd_soc_dai_ops ak4641_i2s_dai_ops = {
.hw_params = ak4641_i2s_hw_params,
.set_fmt = ak4641_i2s_set_dai_fmt,
.digital_mute = ak4641_mute,
.set_sysclk = ak4641_set_dai_sysclk,
};
static const struct snd_soc_dai_ops ak4641_pcm_dai_ops = {
.hw_params = NULL, /* rates are controlled by BT chip */
.set_fmt = ak4641_pcm_set_dai_fmt,
.digital_mute = ak4641_mute,
.set_sysclk = ak4641_set_dai_sysclk,
};
static struct snd_soc_dai_driver ak4641_dai[] = {
{
.name = "ak4641-hifi",
.id = 1,
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 1,
.channels_max = 2,
.rates = AK4641_RATES,
.formats = AK4641_FORMATS,
},
.capture = {
.stream_name = "HiFi Capture",
.channels_min = 1,
.channels_max = 2,
.rates = AK4641_RATES,
.formats = AK4641_FORMATS,
},
.ops = &ak4641_i2s_dai_ops,
.symmetric_rates = 1,
},
{
.name = "ak4641-voice",
.id = 1,
.playback = {
.stream_name = "Voice Playback",
.channels_min = 1,
.channels_max = 1,
.rates = AK4641_RATES_BT,
.formats = AK4641_FORMATS,
},
.capture = {
.stream_name = "Voice Capture",
.channels_min = 1,
.channels_max = 1,
.rates = AK4641_RATES_BT,
.formats = AK4641_FORMATS,
},
.ops = &ak4641_pcm_dai_ops,
.symmetric_rates = 1,
},
};
static int ak4641_suspend(struct snd_soc_codec *codec)
{
ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int ak4641_resume(struct snd_soc_codec *codec)
{
ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int ak4641_probe(struct snd_soc_codec *codec)
{
int ret;
ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_I2C);
if (ret != 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
}
/* power on device */
ak4641_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
static int ak4641_remove(struct snd_soc_codec *codec)
{
ak4641_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_ak4641 = {
.probe = ak4641_probe,
.remove = ak4641_remove,
.suspend = ak4641_suspend,
.resume = ak4641_resume,
.controls = ak4641_snd_controls,
.num_controls = ARRAY_SIZE(ak4641_snd_controls),
.dapm_widgets = ak4641_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak4641_dapm_widgets),
.dapm_routes = ak4641_audio_map,
.num_dapm_routes = ARRAY_SIZE(ak4641_audio_map),
.set_bias_level = ak4641_set_bias_level,
.reg_cache_size = ARRAY_SIZE(ak4641_reg),
.reg_word_size = sizeof(u8),
.reg_cache_default = ak4641_reg,
.reg_cache_step = 1,
};
static int __devinit ak4641_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct ak4641_platform_data *pdata = i2c->dev.platform_data;
struct ak4641_priv *ak4641;
int ret;
ak4641 = devm_kzalloc(&i2c->dev, sizeof(struct ak4641_priv),
GFP_KERNEL);
if (!ak4641)
return -ENOMEM;
if (pdata) {
if (gpio_is_valid(pdata->gpio_power)) {
ret = gpio_request_one(pdata->gpio_power,
GPIOF_OUT_INIT_LOW, "ak4641 power");
if (ret)
goto err_out;
}
if (gpio_is_valid(pdata->gpio_npdn)) {
ret = gpio_request_one(pdata->gpio_npdn,
GPIOF_OUT_INIT_LOW, "ak4641 npdn");
if (ret)
goto err_gpio;
udelay(1); /* > 150 ns */
gpio_set_value(pdata->gpio_npdn, 1);
}
}
i2c_set_clientdata(i2c, ak4641);
ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641,
ak4641_dai, ARRAY_SIZE(ak4641_dai));
if (ret != 0)
goto err_gpio2;
return 0;
err_gpio2:
if (pdata) {
if (gpio_is_valid(pdata->gpio_power))
gpio_set_value(pdata->gpio_power, 0);
if (gpio_is_valid(pdata->gpio_npdn))
gpio_free(pdata->gpio_npdn);
}
err_gpio:
if (pdata && gpio_is_valid(pdata->gpio_power))
gpio_free(pdata->gpio_power);
err_out:
return ret;
}
static int __devexit ak4641_i2c_remove(struct i2c_client *i2c)
{
struct ak4641_platform_data *pdata = i2c->dev.platform_data;
snd_soc_unregister_codec(&i2c->dev);
if (pdata) {
if (gpio_is_valid(pdata->gpio_power)) {
gpio_set_value(pdata->gpio_power, 0);
gpio_free(pdata->gpio_power);
}
if (gpio_is_valid(pdata->gpio_npdn))
gpio_free(pdata->gpio_npdn);
}
return 0;
}
static const struct i2c_device_id ak4641_i2c_id[] = {
{ "ak4641", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id);
static struct i2c_driver ak4641_i2c_driver = {
.driver = {
.name = "ak4641",
.owner = THIS_MODULE,
},
.probe = ak4641_i2c_probe,
.remove = __devexit_p(ak4641_i2c_remove),
.id_table = ak4641_i2c_id,
};
module_i2c_driver(ak4641_i2c_driver);
MODULE_DESCRIPTION("SoC AK4641 driver");
MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>");
MODULE_LICENSE("GPL");
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