Adding upstream version 5.10.209.upstream/5.10.209upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 644 insertions, 0 deletions

diff --git a/sound/soc/codecs/ak4641.c b/sound/soc/codecs/ak4641.c
new file mode 100644
index 000000000..77004cd7c
--- /dev/null
+++ b/sound/soc/codecs/ak4641.c
@@ -0,0 +1,644 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * 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
+ */
+
+#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/regmap.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>
+
+/* AK4641 register space */
+#define AK4641_PM1		0x00
+#define AK4641_PM2		0x01
+#define AK4641_SIG1		0x02
+#define AK4641_SIG2		0x03
+#define AK4641_MODE1		0x04
+#define AK4641_MODE2		0x05
+#define AK4641_DAC		0x06
+#define AK4641_MIC		0x07
+#define AK4641_TIMER		0x08
+#define AK4641_ALC1		0x09
+#define AK4641_ALC2		0x0a
+#define AK4641_PGA		0x0b
+#define AK4641_LATT		0x0c
+#define AK4641_RATT		0x0d
+#define AK4641_VOL		0x0e
+#define AK4641_STATUS		0x0f
+#define AK4641_EQLO		0x10
+#define AK4641_EQMID		0x11
+#define AK4641_EQHI		0x12
+#define AK4641_BTIF		0x13
+
+/* codec private data */
+struct ak4641_priv {
+	struct regmap *regmap;
+	unsigned int sysclk;
+	int deemph;
+	int playback_fs;
+};
+
+/*
+ * ak4641 register cache
+ */
+static const struct reg_default ak4641_reg_defaults[] = {
+	{  0, 0x00 }, {  1, 0x80 }, {  2, 0x00 }, {  3, 0x80 },
+	{  4, 0x02 }, {  5, 0x00 }, {  6, 0x11 }, {  7, 0x05 },
+	{  8, 0x00 }, {  9, 0x00 }, { 10, 0x36 }, { 11, 0x10 },
+	{ 12, 0x00 }, { 13, 0x00 }, { 14, 0x57 }, { 15, 0x00 },
+	{ 16, 0x88 }, { 17, 0x88 }, { 18, 0x08 }, { 19, 0x08 }
+};
+
+static const int deemph_settings[] = {44100, 0, 48000, 32000};
+
+static int ak4641_set_deemph(struct snd_soc_component *component)
+{
+	struct ak4641_priv *ak4641 = snd_soc_component_get_drvdata(component);
+	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(component->dev, "Set deemphasis %d\n", best);
+
+	return snd_soc_component_update_bits(component, AK4641_DAC, 0x3, best);
+}
+
+static int ak4641_put_deemph(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct ak4641_priv *ak4641 = snd_soc_component_get_drvdata(component);
+	int deemph = ucontrol->value.integer.value[0];
+
+	if (deemph > 1)
+		return -EINVAL;
+
+	ak4641->deemph = deemph;
+
+	return ak4641_set_deemph(component);
+}
+
+static int ak4641_get_deemph(struct snd_kcontrol *kcontrol,
+				struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+	struct ak4641_priv *ak4641 = snd_soc_component_get_drvdata(component);
+
+	ucontrol->value.integer.value[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 SOC_ENUM_SINGLE_DECL(ak4641_mono_out_enum,
+			    AK4641_SIG1, 6, ak4641_mono_out);
+static SOC_ENUM_SINGLE_DECL(ak4641_hp_out_enum,
+			    AK4641_MODE2, 2, ak4641_hp_out);
+static SOC_ENUM_SINGLE_DECL(ak4641_mic_select_enum,
+			    AK4641_MIC, 1, ak4641_mic_select);
+static SOC_ENUM_SINGLE_DECL(ak4641_mic_or_dac_enum,
+			    AK4641_BTIF, 4, 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_component *component = codec_dai->component;
+	struct ak4641_priv *ak4641 = snd_soc_component_get_drvdata(component);
+
+	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_component *component = dai->component;
+	struct ak4641_priv *ak4641 = snd_soc_component_get_drvdata(component);
+	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(component->dev, "Error: unsupported fs=%d\n", fs);
+		return -EINVAL;
+	}
+
+	snd_soc_component_update_bits(component, 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(component);
+	}
+
+	return 0;
+}
+
+static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai,
+				  unsigned int fmt)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	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_component_update_bits(component, 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_component *component = codec_dai->component;
+	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_component_write(component, AK4641_MODE1, mode1);
+}
+
+static int ak4641_mute(struct snd_soc_dai *dai, int mute, int direction)
+{
+	struct snd_soc_component *component = dai->component;
+
+	return snd_soc_component_update_bits(component, AK4641_DAC, 0x20, mute ? 0x20 : 0);
+}
+
+static int ak4641_set_bias_level(struct snd_soc_component *component,
+	enum snd_soc_bias_level level)
+{
+	struct ak4641_priv *ak4641 = snd_soc_component_get_drvdata(component);
+	struct ak4641_platform_data *pdata = component->dev->platform_data;
+	int ret;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		/* unmute */
+		snd_soc_component_update_bits(component, AK4641_DAC, 0x20, 0);
+		break;
+	case SND_SOC_BIAS_PREPARE:
+		/* mute */
+		snd_soc_component_update_bits(component, AK4641_DAC, 0x20, 0x20);
+		break;
+	case SND_SOC_BIAS_STANDBY:
+		if (snd_soc_component_get_bias_level(component) == 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 = regcache_sync(ak4641->regmap);
+			if (ret) {
+				dev_err(component->dev,
+					"Failed to sync cache: %d\n", ret);
+				return ret;
+			}
+		}
+		snd_soc_component_update_bits(component, AK4641_PM1, 0x80, 0x80);
+		snd_soc_component_update_bits(component, AK4641_PM2, 0x80, 0);
+		break;
+	case SND_SOC_BIAS_OFF:
+		snd_soc_component_update_bits(component, 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);
+		regcache_mark_dirty(ak4641->regmap);
+		break;
+	}
+	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,
+	.mute_stream  = ak4641_mute,
+	.set_sysclk   = ak4641_set_dai_sysclk,
+	.no_capture_mute = 1,
+};
+
+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,
+	.mute_stream  = ak4641_mute,
+	.set_sysclk   = ak4641_set_dai_sysclk,
+	.no_capture_mute = 1,
+};
+
+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 const struct snd_soc_component_driver soc_component_dev_ak4641 = {
+	.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,
+	.suspend_bias_off	= 1,
+	.idle_bias_on		= 1,
+	.use_pmdown_time	= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+static const struct regmap_config ak4641_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = AK4641_BTIF,
+	.reg_defaults = ak4641_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(ak4641_reg_defaults),
+	.cache_type = REGCACHE_RBTREE,
+};
+
+static int 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;
+
+	ak4641->regmap = devm_regmap_init_i2c(i2c, &ak4641_regmap);
+	if (IS_ERR(ak4641->regmap))
+		return PTR_ERR(ak4641->regmap);
+
+	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 = devm_snd_soc_register_component(&i2c->dev,
+				&soc_component_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 ak4641_i2c_remove(struct i2c_client *i2c)
+{
+	struct ak4641_platform_data *pdata = i2c->dev.platform_data;
+
+	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",
+	},
+	.probe =    ak4641_i2c_probe,
+	.remove =   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");