diff options
Diffstat (limited to 'sound/soc/codecs/ak4641.c')
| -rw-r--r-- | sound/soc/codecs/ak4641.c | 645 |
1 files changed, 645 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4641.c b/sound/soc/codecs/ak4641.c new file mode 100644 index 000000000..05869beff --- /dev/null +++ b/sound/soc/codecs/ak4641.c @@ -0,0 +1,645 @@ +/* + * 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/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) +{ + 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, + .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 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"); |