sound/soc/codecs/ak5558.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 //
 // Audio driver for AK5558 ADC
 //
 // Copyright (C) 2015 Asahi Kasei Microdevices Corporation
 // Copyright 2018 NXP

 #include <linux/delay.h>
 #include <linux/gpio/consumer.h>
 #include <linux/i2c.h>
 #include <linux/module.h>
 #include <linux/pm_runtime.h>
 #include <linux/regmap.h>
 #include <linux/slab.h>

 #include <sound/initval.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/soc.h>
 #include <sound/soc-dapm.h>
 #include <sound/tlv.h>

 #include "ak5558.h"

 /* AK5558 Codec Private Data */
 struct ak5558_priv {
 	struct snd_soc_component component;
 	struct regmap *regmap;
 	struct i2c_client *i2c;
 	struct gpio_desc *reset_gpiod; /* Reset & Power down GPIO */
 	int slots;
 	int slot_width;
 };

 /* ak5558 register cache & default register settings */
 static const struct reg_default ak5558_reg[] = {
 	{ 0x0, 0xFF },	/*	0x00	AK5558_00_POWER_MANAGEMENT1	*/
 	{ 0x1, 0x01 },	/*	0x01	AK5558_01_POWER_MANAGEMENT2	*/
 	{ 0x2, 0x01 },	/*	0x02	AK5558_02_CONTROL1		*/
 	{ 0x3, 0x00 },	/*	0x03	AK5558_03_CONTROL2		*/
 	{ 0x4, 0x00 },	/*	0x04	AK5558_04_CONTROL3		*/
 	{ 0x5, 0x00 }	/*	0x05	AK5558_05_DSD			*/
 };

 static const char * const mono_texts[] = {
 	"8 Slot", "2 Slot", "4 Slot", "1 Slot",
 };

 static const struct soc_enum ak5558_mono_enum[] = {
 	SOC_ENUM_SINGLE(AK5558_01_POWER_MANAGEMENT2, 1,
 			ARRAY_SIZE(mono_texts), mono_texts),
 };

 static const char * const digfil_texts[] = {
 	"Sharp Roll-Off", "Show Roll-Off",
 	"Short Delay Sharp Roll-Off", "Short Delay Show Roll-Off",
 };

 static const struct soc_enum ak5558_adcset_enum[] = {
 	SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
 			ARRAY_SIZE(digfil_texts), digfil_texts),
 };

 static const struct snd_kcontrol_new ak5558_snd_controls[] = {
 	SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
 	SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[0]),
 };

 static const struct snd_soc_dapm_widget ak5558_dapm_widgets[] = {
 	/* Analog Input */
 	SND_SOC_DAPM_INPUT("AIN1"),
 	SND_SOC_DAPM_INPUT("AIN2"),
 	SND_SOC_DAPM_INPUT("AIN3"),
 	SND_SOC_DAPM_INPUT("AIN4"),
 	SND_SOC_DAPM_INPUT("AIN5"),
 	SND_SOC_DAPM_INPUT("AIN6"),
 	SND_SOC_DAPM_INPUT("AIN7"),
 	SND_SOC_DAPM_INPUT("AIN8"),

 	SND_SOC_DAPM_ADC("ADC Ch1", NULL, AK5558_00_POWER_MANAGEMENT1, 0, 0),
 	SND_SOC_DAPM_ADC("ADC Ch2", NULL, AK5558_00_POWER_MANAGEMENT1, 1, 0),
 	SND_SOC_DAPM_ADC("ADC Ch3", NULL, AK5558_00_POWER_MANAGEMENT1, 2, 0),
 	SND_SOC_DAPM_ADC("ADC Ch4", NULL, AK5558_00_POWER_MANAGEMENT1, 3, 0),
 	SND_SOC_DAPM_ADC("ADC Ch5", NULL, AK5558_00_POWER_MANAGEMENT1, 4, 0),
 	SND_SOC_DAPM_ADC("ADC Ch6", NULL, AK5558_00_POWER_MANAGEMENT1, 5, 0),
 	SND_SOC_DAPM_ADC("ADC Ch7", NULL, AK5558_00_POWER_MANAGEMENT1, 6, 0),
 	SND_SOC_DAPM_ADC("ADC Ch8", NULL, AK5558_00_POWER_MANAGEMENT1, 7, 0),

 	SND_SOC_DAPM_AIF_OUT("SDTO", "Capture", 0, SND_SOC_NOPM, 0, 0),
 };

 static const struct snd_soc_dapm_route ak5558_intercon[] = {
 	{"ADC Ch1", NULL, "AIN1"},
 	{"SDTO", NULL, "ADC Ch1"},

 	{"ADC Ch2", NULL, "AIN2"},
 	{"SDTO", NULL, "ADC Ch2"},

 	{"ADC Ch3", NULL, "AIN3"},
 	{"SDTO", NULL, "ADC Ch3"},

 	{"ADC Ch4", NULL, "AIN4"},
 	{"SDTO", NULL, "ADC Ch4"},

 	{"ADC Ch5", NULL, "AIN5"},
 	{"SDTO", NULL, "ADC Ch5"},

 	{"ADC Ch6", NULL, "AIN6"},
 	{"SDTO", NULL, "ADC Ch6"},

 	{"ADC Ch7", NULL, "AIN7"},
 	{"SDTO", NULL, "ADC Ch7"},

 	{"ADC Ch8", NULL, "AIN8"},
 	{"SDTO", NULL, "ADC Ch8"},
 };

 static int ak5558_set_mcki(struct snd_soc_component *component)
 {
 	return snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_CKS,
 				   AK5558_CKS_AUTO);
 }

 static int ak5558_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 ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
 	u8 bits;
 	int pcm_width = max(params_physical_width(params), ak5558->slot_width);

 	switch (pcm_width) {
 	case 16:
 		bits = AK5558_DIF_24BIT_MODE;
 		break;
 	case 32:
 		bits = AK5558_DIF_32BIT_MODE;
 		break;
 	default:
 		return -EINVAL;
 	}

 	snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);

 	return 0;
 }

 static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 {
 	struct snd_soc_component *component = dai->component;
 	u8 format;

 	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 	case SND_SOC_DAIFMT_CBS_CFS:
 		break;
 	case SND_SOC_DAIFMT_CBM_CFM:
 		break;
 	case SND_SOC_DAIFMT_CBS_CFM:
 	case SND_SOC_DAIFMT_CBM_CFS:
 	default:
 		dev_err(dai->dev, "Clock mode unsupported");
 		return -EINVAL;
 	}

 	/* set master/slave audio interface */
 	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 	case SND_SOC_DAIFMT_I2S:
 		format = AK5558_DIF_I2S_MODE;
 		break;
 	case SND_SOC_DAIFMT_LEFT_J:
 		format = AK5558_DIF_MSB_MODE;
 		break;
 	case SND_SOC_DAIFMT_DSP_B:
 		format = AK5558_DIF_MSB_MODE;
 		break;
 	default:
 		return -EINVAL;
 	}

 	snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_DIF, format);

 	return 0;
 }

 static int ak5558_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 			       unsigned int rx_mask, int slots,
 			       int slot_width)
 {
 	struct snd_soc_component *component = dai->component;
 	struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
 	int tdm_mode;

 	ak5558->slots = slots;
 	ak5558->slot_width = slot_width;

 	switch (slots * slot_width) {
 	case 128:
 		tdm_mode = AK5558_MODE_TDM128;
 		break;
 	case 256:
 		tdm_mode = AK5558_MODE_TDM256;
 		break;
 	case 512:
 		tdm_mode = AK5558_MODE_TDM512;
 		break;
 	default:
 		tdm_mode = AK5558_MODE_NORMAL;
 		break;
 	}

 	snd_soc_component_update_bits(component, AK5558_03_CONTROL2, AK5558_MODE_BITS,
 			    tdm_mode);
 	return 0;
 }

 #define AK5558_FORMATS	(SNDRV_PCM_FMTBIT_S16_LE |\
 			 SNDRV_PCM_FMTBIT_S24_LE |\
 			 SNDRV_PCM_FMTBIT_S32_LE)

 static const unsigned int ak5558_rates[] = {
 	8000, 11025,  16000, 22050,
 	32000, 44100, 48000, 88200,
 	96000, 176400, 192000, 352800,
 	384000, 705600, 768000, 1411200,
 	2822400,
 };

 static const struct snd_pcm_hw_constraint_list ak5558_rate_constraints = {
 	.count = ARRAY_SIZE(ak5558_rates),
 	.list = ak5558_rates,
 };

 static int ak5558_startup(struct snd_pcm_substream *substream,
 			  struct snd_soc_dai *dai)
 {
 	return snd_pcm_hw_constraint_list(substream->runtime, 0,
 					  SNDRV_PCM_HW_PARAM_RATE,
 					  &ak5558_rate_constraints);
 }

 static const struct snd_soc_dai_ops ak5558_dai_ops = {
 	.startup        = ak5558_startup,
 	.hw_params	= ak5558_hw_params,

 	.set_fmt	= ak5558_set_dai_fmt,
 	.set_tdm_slot   = ak5558_set_tdm_slot,
 };

 static struct snd_soc_dai_driver ak5558_dai = {
 	.name = "ak5558-aif",
 	.capture = {
 		.stream_name = "Capture",
 		.channels_min = 1,
 		.channels_max = 8,
 		.rates = SNDRV_PCM_RATE_KNOT,
 		.formats = AK5558_FORMATS,
 	},
 	.ops = &ak5558_dai_ops,
 };

 static void ak5558_power_off(struct ak5558_priv *ak5558)
 {
 	if (!ak5558->reset_gpiod)
 		return;

 	gpiod_set_value_cansleep(ak5558->reset_gpiod, 0);
 	usleep_range(1000, 2000);
 }

 static void ak5558_power_on(struct ak5558_priv *ak5558)
 {
 	if (!ak5558->reset_gpiod)
 		return;

 	gpiod_set_value_cansleep(ak5558->reset_gpiod, 1);
 	usleep_range(1000, 2000);
 }

 static int ak5558_probe(struct snd_soc_component *component)
 {
 	struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);

 	ak5558_power_on(ak5558);
 	return ak5558_set_mcki(component);
 }

 static void ak5558_remove(struct snd_soc_component *component)
 {
 	struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);

 	ak5558_power_off(ak5558);
 }

 static int __maybe_unused ak5558_runtime_suspend(struct device *dev)
 {
 	struct ak5558_priv *ak5558 = dev_get_drvdata(dev);

 	regcache_cache_only(ak5558->regmap, true);
 	ak5558_power_off(ak5558);

 	return 0;
 }

 static int __maybe_unused ak5558_runtime_resume(struct device *dev)
 {
 	struct ak5558_priv *ak5558 = dev_get_drvdata(dev);

 	ak5558_power_off(ak5558);
 	ak5558_power_on(ak5558);

 	regcache_cache_only(ak5558->regmap, false);
 	regcache_mark_dirty(ak5558->regmap);

 	return regcache_sync(ak5558->regmap);
 }

 static const struct dev_pm_ops ak5558_pm = {
 	SET_RUNTIME_PM_OPS(ak5558_runtime_suspend, ak5558_runtime_resume, NULL)
 	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
 				pm_runtime_force_resume)
 };

 static const struct snd_soc_component_driver soc_codec_dev_ak5558 = {
 	.probe			= ak5558_probe,
 	.remove			= ak5558_remove,
 	.controls		= ak5558_snd_controls,
 	.num_controls		= ARRAY_SIZE(ak5558_snd_controls),
 	.dapm_widgets		= ak5558_dapm_widgets,
 	.num_dapm_widgets	= ARRAY_SIZE(ak5558_dapm_widgets),
 	.dapm_routes		= ak5558_intercon,
 	.num_dapm_routes	= ARRAY_SIZE(ak5558_intercon),
 	.idle_bias_on		= 1,
 	.use_pmdown_time	= 1,
 	.endianness		= 1,
 	.non_legacy_dai_naming	= 1,
 };

 static const struct regmap_config ak5558_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,

 	.max_register = AK5558_05_DSD,
 	.reg_defaults = ak5558_reg,
 	.num_reg_defaults = ARRAY_SIZE(ak5558_reg),
 	.cache_type = REGCACHE_RBTREE,
 };

 static int ak5558_i2c_probe(struct i2c_client *i2c)
 {
 	struct ak5558_priv *ak5558;
 	int ret = 0;

 	ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL);
 	if (!ak5558)
 		return -ENOMEM;

 	ak5558->regmap = devm_regmap_init_i2c(i2c, &ak5558_regmap);
 	if (IS_ERR(ak5558->regmap))
 		return PTR_ERR(ak5558->regmap);

 	i2c_set_clientdata(i2c, ak5558);
 	ak5558->i2c = i2c;

 	ak5558->reset_gpiod = devm_gpiod_get_optional(&i2c->dev, "reset",
 						      GPIOD_OUT_LOW);
 	if (IS_ERR(ak5558->reset_gpiod))
 		return PTR_ERR(ak5558->reset_gpiod);

 	ret = devm_snd_soc_register_component(&i2c->dev,
 				     &soc_codec_dev_ak5558,
 				     &ak5558_dai, 1);
 	if (ret)
 		return ret;

 	pm_runtime_enable(&i2c->dev);

 	return 0;
 }

 static int ak5558_i2c_remove(struct i2c_client *i2c)
 {
 	pm_runtime_disable(&i2c->dev);

 	return 0;
 }

 static const struct of_device_id ak5558_i2c_dt_ids[] = {
 	{ .compatible = "asahi-kasei,ak5558"},
 	{ }
 };

 static struct i2c_driver ak5558_i2c_driver = {
 	.driver = {
 		.name = "ak5558",
 		.of_match_table = of_match_ptr(ak5558_i2c_dt_ids),
 		.pm = &ak5558_pm,
 	},
 	.probe_new = ak5558_i2c_probe,
 	.remove = ak5558_i2c_remove,
 };

 module_i2c_driver(ak5558_i2c_driver);

 MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
 MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
 MODULE_DESCRIPTION("ASoC AK5558 ADC driver");
 MODULE_LICENSE("GPL v2");
	// SPDX-License-Identifier: GPL-2.0
	//
	// Audio driver for AK5558 ADC
	//
	// Copyright (C) 2015 Asahi Kasei Microdevices Corporation
	// Copyright 2018 NXP

	#include <linux/delay.h>
	#include <linux/gpio/consumer.h>
	#include <linux/i2c.h>
	#include <linux/module.h>
	#include <linux/pm_runtime.h>
	#include <linux/regmap.h>
	#include <linux/slab.h>

	#include <sound/initval.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/soc.h>
	#include <sound/soc-dapm.h>
	#include <sound/tlv.h>

	#include "ak5558.h"

	/* AK5558 Codec Private Data */
	struct ak5558_priv {
	struct snd_soc_component component;
	struct regmap *regmap;
	struct i2c_client *i2c;
	struct gpio_desc reset_gpiod; / Reset & Power down GPIO */
	int slots;
	int slot_width;
	};

	/* ak5558 register cache & default register settings */
	static const struct reg_default ak5558_reg[] = {
	{ 0x0, 0xFF }, /* 0x00 AK5558_00_POWER_MANAGEMENT1 */
	{ 0x1, 0x01 }, /* 0x01 AK5558_01_POWER_MANAGEMENT2 */
	{ 0x2, 0x01 }, /* 0x02 AK5558_02_CONTROL1 */
	{ 0x3, 0x00 }, /* 0x03 AK5558_03_CONTROL2 */
	{ 0x4, 0x00 }, /* 0x04 AK5558_04_CONTROL3 */
	{ 0x5, 0x00 } /* 0x05 AK5558_05_DSD */
	};

	static const char * const mono_texts[] = {
	"8 Slot", "2 Slot", "4 Slot", "1 Slot",
	};

	static const struct soc_enum ak5558_mono_enum[] = {
	SOC_ENUM_SINGLE(AK5558_01_POWER_MANAGEMENT2, 1,
	ARRAY_SIZE(mono_texts), mono_texts),
	};

	static const char * const digfil_texts[] = {
	"Sharp Roll-Off", "Show Roll-Off",
	"Short Delay Sharp Roll-Off", "Short Delay Show Roll-Off",
	};

	static const struct soc_enum ak5558_adcset_enum[] = {
	SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
	ARRAY_SIZE(digfil_texts), digfil_texts),
	};

	static const struct snd_kcontrol_new ak5558_snd_controls[] = {
	SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
	SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[0]),
	};

	static const struct snd_soc_dapm_widget ak5558_dapm_widgets[] = {
	/* Analog Input */
	SND_SOC_DAPM_INPUT("AIN1"),
	SND_SOC_DAPM_INPUT("AIN2"),
	SND_SOC_DAPM_INPUT("AIN3"),
	SND_SOC_DAPM_INPUT("AIN4"),
	SND_SOC_DAPM_INPUT("AIN5"),
	SND_SOC_DAPM_INPUT("AIN6"),
	SND_SOC_DAPM_INPUT("AIN7"),
	SND_SOC_DAPM_INPUT("AIN8"),

	SND_SOC_DAPM_ADC("ADC Ch1", NULL, AK5558_00_POWER_MANAGEMENT1, 0, 0),
	SND_SOC_DAPM_ADC("ADC Ch2", NULL, AK5558_00_POWER_MANAGEMENT1, 1, 0),
	SND_SOC_DAPM_ADC("ADC Ch3", NULL, AK5558_00_POWER_MANAGEMENT1, 2, 0),
	SND_SOC_DAPM_ADC("ADC Ch4", NULL, AK5558_00_POWER_MANAGEMENT1, 3, 0),
	SND_SOC_DAPM_ADC("ADC Ch5", NULL, AK5558_00_POWER_MANAGEMENT1, 4, 0),
	SND_SOC_DAPM_ADC("ADC Ch6", NULL, AK5558_00_POWER_MANAGEMENT1, 5, 0),
	SND_SOC_DAPM_ADC("ADC Ch7", NULL, AK5558_00_POWER_MANAGEMENT1, 6, 0),
	SND_SOC_DAPM_ADC("ADC Ch8", NULL, AK5558_00_POWER_MANAGEMENT1, 7, 0),

	SND_SOC_DAPM_AIF_OUT("SDTO", "Capture", 0, SND_SOC_NOPM, 0, 0),
	};

	static const struct snd_soc_dapm_route ak5558_intercon[] = {
	{"ADC Ch1", NULL, "AIN1"},
	{"SDTO", NULL, "ADC Ch1"},

	{"ADC Ch2", NULL, "AIN2"},
	{"SDTO", NULL, "ADC Ch2"},

	{"ADC Ch3", NULL, "AIN3"},
	{"SDTO", NULL, "ADC Ch3"},

	{"ADC Ch4", NULL, "AIN4"},
	{"SDTO", NULL, "ADC Ch4"},

	{"ADC Ch5", NULL, "AIN5"},
	{"SDTO", NULL, "ADC Ch5"},

	{"ADC Ch6", NULL, "AIN6"},
	{"SDTO", NULL, "ADC Ch6"},

	{"ADC Ch7", NULL, "AIN7"},
	{"SDTO", NULL, "ADC Ch7"},

	{"ADC Ch8", NULL, "AIN8"},
	{"SDTO", NULL, "ADC Ch8"},
	};

	static int ak5558_set_mcki(struct snd_soc_component *component)
	{
	return snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_CKS,
	AK5558_CKS_AUTO);
	}

	static int ak5558_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 ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
	u8 bits;
	int pcm_width = max(params_physical_width(params), ak5558->slot_width);

	switch (pcm_width) {
	case 16:
	bits = AK5558_DIF_24BIT_MODE;
	break;
	case 32:
	bits = AK5558_DIF_32BIT_MODE;
	break;
	default:
	return -EINVAL;
	}

	snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_BITS, bits);

	return 0;
	}

	static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	{
	struct snd_soc_component *component = dai->component;
	u8 format;

	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
	case SND_SOC_DAIFMT_CBS_CFS:
	break;
	case SND_SOC_DAIFMT_CBM_CFM:
	break;
	case SND_SOC_DAIFMT_CBS_CFM:
	case SND_SOC_DAIFMT_CBM_CFS:
	default:
	dev_err(dai->dev, "Clock mode unsupported");
	return -EINVAL;
	}

	/* set master/slave audio interface */
	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
	case SND_SOC_DAIFMT_I2S:
	format = AK5558_DIF_I2S_MODE;
	break;
	case SND_SOC_DAIFMT_LEFT_J:
	format = AK5558_DIF_MSB_MODE;
	break;
	case SND_SOC_DAIFMT_DSP_B:
	format = AK5558_DIF_MSB_MODE;
	break;
	default:
	return -EINVAL;
	}

	snd_soc_component_update_bits(component, AK5558_02_CONTROL1, AK5558_DIF, format);

	return 0;
	}

	static int ak5558_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
	unsigned int rx_mask, int slots,
	int slot_width)
	{
	struct snd_soc_component *component = dai->component;
	struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);
	int tdm_mode;

	ak5558->slots = slots;
	ak5558->slot_width = slot_width;

	switch (slots * slot_width) {
	case 128:
	tdm_mode = AK5558_MODE_TDM128;
	break;
	case 256:
	tdm_mode = AK5558_MODE_TDM256;
	break;
	case 512:
	tdm_mode = AK5558_MODE_TDM512;
	break;
	default:
	tdm_mode = AK5558_MODE_NORMAL;
	break;
	}

	snd_soc_component_update_bits(component, AK5558_03_CONTROL2, AK5558_MODE_BITS,
	tdm_mode);
	return 0;
	}

	#define AK5558_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \|\
	SNDRV_PCM_FMTBIT_S24_LE \|\
	SNDRV_PCM_FMTBIT_S32_LE)

	static const unsigned int ak5558_rates[] = {
	8000, 11025, 16000, 22050,
	32000, 44100, 48000, 88200,
	96000, 176400, 192000, 352800,
	384000, 705600, 768000, 1411200,
	2822400,
	};

	static const struct snd_pcm_hw_constraint_list ak5558_rate_constraints = {
	.count = ARRAY_SIZE(ak5558_rates),
	.list = ak5558_rates,
	};

	static int ak5558_startup(struct snd_pcm_substream *substream,
	struct snd_soc_dai *dai)
	{
	return snd_pcm_hw_constraint_list(substream->runtime, 0,
	SNDRV_PCM_HW_PARAM_RATE,
	&ak5558_rate_constraints);
	}

	static const struct snd_soc_dai_ops ak5558_dai_ops = {
	.startup = ak5558_startup,
	.hw_params = ak5558_hw_params,

	.set_fmt = ak5558_set_dai_fmt,
	.set_tdm_slot = ak5558_set_tdm_slot,
	};

	static struct snd_soc_dai_driver ak5558_dai = {
	.name = "ak5558-aif",
	.capture = {
	.stream_name = "Capture",
	.channels_min = 1,
	.channels_max = 8,
	.rates = SNDRV_PCM_RATE_KNOT,
	.formats = AK5558_FORMATS,
	},
	.ops = &ak5558_dai_ops,
	};

	static void ak5558_power_off(struct ak5558_priv *ak5558)
	{
	if (!ak5558->reset_gpiod)
	return;

	gpiod_set_value_cansleep(ak5558->reset_gpiod, 0);
	usleep_range(1000, 2000);
	}

	static void ak5558_power_on(struct ak5558_priv *ak5558)
	{
	if (!ak5558->reset_gpiod)
	return;

	gpiod_set_value_cansleep(ak5558->reset_gpiod, 1);
	usleep_range(1000, 2000);
	}

	static int ak5558_probe(struct snd_soc_component *component)
	{
	struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);

	ak5558_power_on(ak5558);
	return ak5558_set_mcki(component);
	}

	static void ak5558_remove(struct snd_soc_component *component)
	{
	struct ak5558_priv *ak5558 = snd_soc_component_get_drvdata(component);

	ak5558_power_off(ak5558);
	}

	static int __maybe_unused ak5558_runtime_suspend(struct device *dev)
	{
	struct ak5558_priv *ak5558 = dev_get_drvdata(dev);

	regcache_cache_only(ak5558->regmap, true);
	ak5558_power_off(ak5558);

	return 0;
	}

	static int __maybe_unused ak5558_runtime_resume(struct device *dev)
	{
	struct ak5558_priv *ak5558 = dev_get_drvdata(dev);

	ak5558_power_off(ak5558);
	ak5558_power_on(ak5558);

	regcache_cache_only(ak5558->regmap, false);
	regcache_mark_dirty(ak5558->regmap);

	return regcache_sync(ak5558->regmap);
	}

	static const struct dev_pm_ops ak5558_pm = {
	SET_RUNTIME_PM_OPS(ak5558_runtime_suspend, ak5558_runtime_resume, NULL)
	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
	pm_runtime_force_resume)
	};

	static const struct snd_soc_component_driver soc_codec_dev_ak5558 = {
	.probe = ak5558_probe,
	.remove = ak5558_remove,
	.controls = ak5558_snd_controls,
	.num_controls = ARRAY_SIZE(ak5558_snd_controls),
	.dapm_widgets = ak5558_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(ak5558_dapm_widgets),
	.dapm_routes = ak5558_intercon,
	.num_dapm_routes = ARRAY_SIZE(ak5558_intercon),
	.idle_bias_on = 1,
	.use_pmdown_time = 1,
	.endianness = 1,
	.non_legacy_dai_naming = 1,
	};

	static const struct regmap_config ak5558_regmap = {
	.reg_bits = 8,
	.val_bits = 8,

	.max_register = AK5558_05_DSD,
	.reg_defaults = ak5558_reg,
	.num_reg_defaults = ARRAY_SIZE(ak5558_reg),
	.cache_type = REGCACHE_RBTREE,
	};

	static int ak5558_i2c_probe(struct i2c_client *i2c)
	{
	struct ak5558_priv *ak5558;
	int ret = 0;

	ak5558 = devm_kzalloc(&i2c->dev, sizeof(*ak5558), GFP_KERNEL);
	if (!ak5558)
	return -ENOMEM;

	ak5558->regmap = devm_regmap_init_i2c(i2c, &ak5558_regmap);
	if (IS_ERR(ak5558->regmap))
	return PTR_ERR(ak5558->regmap);

	i2c_set_clientdata(i2c, ak5558);
	ak5558->i2c = i2c;

	ak5558->reset_gpiod = devm_gpiod_get_optional(&i2c->dev, "reset",
	GPIOD_OUT_LOW);
	if (IS_ERR(ak5558->reset_gpiod))
	return PTR_ERR(ak5558->reset_gpiod);

	ret = devm_snd_soc_register_component(&i2c->dev,
	&soc_codec_dev_ak5558,
	&ak5558_dai, 1);
	if (ret)
	return ret;

	pm_runtime_enable(&i2c->dev);

	return 0;
	}

	static int ak5558_i2c_remove(struct i2c_client *i2c)
	{
	pm_runtime_disable(&i2c->dev);

	return 0;
	}

	static const struct of_device_id ak5558_i2c_dt_ids[] = {
	{ .compatible = "asahi-kasei,ak5558"},
	{ }
	};

	static struct i2c_driver ak5558_i2c_driver = {
	.driver = {
	.name = "ak5558",
	.of_match_table = of_match_ptr(ak5558_i2c_dt_ids),
	.pm = &ak5558_pm,
	},
	.probe_new = ak5558_i2c_probe,
	.remove = ak5558_i2c_remove,
	};

	module_i2c_driver(ak5558_i2c_driver);

	MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
	MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
	MODULE_DESCRIPTION("ASoC AK5558 ADC driver");
	MODULE_LICENSE("GPL v2");