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Subject[PATCH v3 1/2] ASoC: codecs: Add support for AK5558 ADC driver
Date
AK5558 is a 32-bit, 768 kHZ sampling, differential input ADC
for digital audio systems.

Datasheet is available at:

https://www.akm.com/akm/en/file/datasheet/AK5558VN.pdf

Initial patch includes support for normal and TDM modes.

Signed-off-by: Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>
[initial coding for 3.18 kernel]
Signed-off-by: Mihai Serban <mihai.serban@nxp.com>
[cleanups and porting to 4.9 kernel]
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
[tdm support]
Signed-off-by: Daniel Baluta <daniel.baluta@nxp.com>
[pm support, cleanups and porting to latest kernel]
---
sound/soc/codecs/Kconfig | 6 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/ak5558.c | 618 ++++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/ak5558.h | 52 ++++
4 files changed, 678 insertions(+)
create mode 100644 sound/soc/codecs/ak5558.c
create mode 100644 sound/soc/codecs/ak5558.h

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 2b331f7..c29728c 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -42,6 +42,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_AK4642 if I2C
select SND_SOC_AK4671 if I2C
select SND_SOC_AK5386
+ select SND_SOC_AK5558 if I2C
select SND_SOC_ALC5623 if I2C
select SND_SOC_ALC5632 if I2C
select SND_SOC_BT_SCO
@@ -398,6 +399,11 @@ config SND_SOC_AK4671
config SND_SOC_AK5386
tristate "AKM AK5638 CODEC"

+config SND_SOC_AK5558
+ tristate "AKM AK5558 CODEC"
+ depends on I2C
+ select REGMAP_I2C
+
config SND_SOC_ALC5623
tristate "Realtek ALC5623 CODEC"
depends on I2C
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index da15713..3e71d40 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -34,6 +34,7 @@ snd-soc-ak4641-objs := ak4641.o
snd-soc-ak4642-objs := ak4642.o
snd-soc-ak4671-objs := ak4671.o
snd-soc-ak5386-objs := ak5386.o
+snd-soc-ak5558-objs := ak5558.o
snd-soc-arizona-objs := arizona.o
snd-soc-bt-sco-objs := bt-sco.o
snd-soc-cq93vc-objs := cq93vc.o
@@ -277,6 +278,7 @@ obj-$(CONFIG_SND_SOC_AK4641) += snd-soc-ak4641.o
obj-$(CONFIG_SND_SOC_AK4642) += snd-soc-ak4642.o
obj-$(CONFIG_SND_SOC_AK4671) += snd-soc-ak4671.o
obj-$(CONFIG_SND_SOC_AK5386) += snd-soc-ak5386.o
+obj-$(CONFIG_SND_SOC_AK5558) += snd-soc-ak5558.o
obj-$(CONFIG_SND_SOC_ALC5623) += snd-soc-alc5623.o
obj-$(CONFIG_SND_SOC_ALC5632) += snd-soc-alc5632.o
obj-$(CONFIG_SND_SOC_ARIZONA) += snd-soc-arizona.o
diff --git a/sound/soc/codecs/ak5558.c b/sound/soc/codecs/ak5558.c
new file mode 100644
index 0000000..c1eed82
--- /dev/null
+++ b/sound/soc/codecs/ak5558.c
@@ -0,0 +1,618 @@
+/* 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_codec codec;
+ struct regmap *regmap;
+ struct i2c_client *i2c;
+ int fs; /* Sampling Frequency */
+ int rclk; /* Master Clock */
+ 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 tdm_texts[] = {
+ "Off", "TDM128", "TDM256", "TDM512",
+};
+
+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_03_CONTROL2, 5,
+ ARRAY_SIZE(tdm_texts), tdm_texts),
+ SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 0,
+ ARRAY_SIZE(digfil_texts), digfil_texts),
+};
+
+static const char * const dsdon_texts[] = {
+ "PCM", "DSD",
+};
+
+static const char * const dsdsel_texts[] = {
+ "64fs", "128fs", "256fs"
+};
+
+static const char * const dckb_texts[] = {
+ "Falling", "Rising",
+};
+
+static const char * const dcks_texts[] = {
+ "512fs", "768fs",
+};
+
+static const struct soc_enum ak5558_dsdset_enum[] = {
+ SOC_ENUM_SINGLE(AK5558_04_CONTROL3, 7,
+ ARRAY_SIZE(dsdon_texts), dsdon_texts),
+ SOC_ENUM_SINGLE(AK5558_05_DSD, 0,
+ ARRAY_SIZE(dsdsel_texts), dsdsel_texts),
+ SOC_ENUM_SINGLE(AK5558_05_DSD, 2, ARRAY_SIZE(dckb_texts), dckb_texts),
+ SOC_ENUM_SINGLE(AK5558_05_DSD, 5, ARRAY_SIZE(dcks_texts), dcks_texts),
+};
+
+static const struct snd_kcontrol_new ak5558_snd_controls[] = {
+ SOC_ENUM("AK5558 Monaural Mode", ak5558_mono_enum[0]),
+ SOC_ENUM("AK5558 TDM mode", ak5558_adcset_enum[0]),
+ SOC_ENUM("AK5558 Digital Filter", ak5558_adcset_enum[1]),
+
+ SOC_ENUM("AK5558 DSD Mode", ak5558_dsdset_enum[0]),
+ SOC_ENUM("AK5558 Frequency of DCLK", ak5558_dsdset_enum[1]),
+ SOC_ENUM("AK5558 Polarity of DCLK", ak5558_dsdset_enum[2]),
+ SOC_ENUM("AK5558 Master Clock Frequency at DSD Mode",
+ ak5558_dsdset_enum[3]),
+
+ SOC_SINGLE("AK5558 DSD Phase Modulation", AK5558_05_DSD, 3, 1, 0),
+};
+
+static const char * const ak5558_channel_select_texts[] = {"Off", "On"};
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel1_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel1_mux_control =
+ SOC_DAPM_ENUM("Ch1 Switch", ak5558_channel1_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel2_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel2_mux_control =
+ SOC_DAPM_ENUM("Ch2 Switch", ak5558_channel2_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel3_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel3_mux_control =
+ SOC_DAPM_ENUM("Ch3 Switch", ak5558_channel3_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel4_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel4_mux_control =
+ SOC_DAPM_ENUM("Ch4 Switch", ak5558_channel4_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel5_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel5_mux_control =
+ SOC_DAPM_ENUM("Ch5 Switch", ak5558_channel5_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel6_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel6_mux_control =
+ SOC_DAPM_ENUM("Ch6 Switch", ak5558_channel6_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel7_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel7_mux_control =
+ SOC_DAPM_ENUM("Ch7 Switch", ak5558_channel7_mux_enum);
+
+static SOC_ENUM_SINGLE_VIRT_DECL(ak5558_channel8_mux_enum,
+ ak5558_channel_select_texts);
+
+static const struct snd_kcontrol_new ak5558_channel8_mux_control =
+ SOC_DAPM_ENUM("Ch8 Switch", ak5558_channel8_mux_enum);
+
+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_MUX("AK5558 Ch1 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel1_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch2 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel2_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch3 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel3_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch4 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel4_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch5 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel5_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch6 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel6_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch7 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel7_mux_control),
+ SND_SOC_DAPM_MUX("AK5558 Ch8 Enable", SND_SOC_NOPM, 0, 0,
+ &ak5558_channel8_mux_control),
+
+ 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[] = {
+ {"AK5558 Ch1 Enable", "On", "AIN1"},
+ {"ADC Ch1", NULL, "AK5558 Ch1 Enable"},
+ {"SDTO", NULL, "ADC Ch1"},
+
+ {"AK5558 Ch2 Enable", "On", "AIN2"},
+ {"ADC Ch2", NULL, "AK5558 Ch2 Enable"},
+ {"SDTO", NULL, "ADC Ch2"},
+
+ {"AK5558 Ch3 Enable", "On", "AIN3"},
+ {"ADC Ch3", NULL, "AK5558 Ch3 Enable"},
+ {"SDTO", NULL, "ADC Ch3"},
+
+ {"AK5558 Ch4 Enable", "On", "AIN4"},
+ {"ADC Ch4", NULL, "AK5558 Ch4 Enable"},
+ {"SDTO", NULL, "ADC Ch4"},
+
+ {"AK5558 Ch5 Enable", "On", "AIN5"},
+ {"ADC Ch5", NULL, "AK5558 Ch5 Enable"},
+ {"SDTO", NULL, "ADC Ch5"},
+
+ {"AK5558 Ch6 Enable", "On", "AIN6"},
+ {"ADC Ch6", NULL, "AK5558 Ch6 Enable"},
+ {"SDTO", NULL, "ADC Ch6"},
+
+ {"AK5558 Ch7 Enable", "On", "AIN7"},
+ {"ADC Ch7", NULL, "AK5558 Ch7 Enable"},
+ {"SDTO", NULL, "ADC Ch7"},
+
+ {"AK5558 Ch8 Enable", "On", "AIN8"},
+ {"ADC Ch8", NULL, "AK5558 Ch8 Enable"},
+ {"SDTO", NULL, "ADC Ch8"},
+};
+
+static int ak5558_set_mcki(struct snd_soc_codec *codec, int fs, int rclk)
+{
+ u8 mode;
+
+ mode = snd_soc_read(codec, AK5558_02_CONTROL1);
+ mode &= ~AK5558_CKS;
+ mode |= AK5558_CKS_AUTO;
+
+ snd_soc_update_bits(codec, AK5558_02_CONTROL1, AK5558_CKS, mode);
+
+ return 0;
+}
+
+static int ak5558_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+ u8 bits;
+ int pcm_width = max(params_physical_width(params), ak5558->slot_width);
+
+ /* set master/slave audio interface */
+ bits = snd_soc_read(codec, AK5558_02_CONTROL1);
+ bits &= ~AK5558_BITS;
+
+ switch (pcm_width) {
+ case 16:
+ bits |= AK5558_DIF_24BIT_MODE;
+ break;
+ case 32:
+ bits |= AK5558_DIF_32BIT_MODE;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ak5558->fs = params_rate(params);
+ snd_soc_update_bits(codec, AK5558_02_CONTROL1, AK5558_BITS, bits);
+
+ ak5558_set_mcki(codec, ak5558->fs, ak5558->rclk);
+
+ return 0;
+}
+
+static int ak5558_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+
+ ak5558->rclk = freq;
+ ak5558_set_mcki(codec, ak5558->fs, ak5558->rclk);
+
+ return 0;
+}
+
+static int ak5558_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ 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 */
+ format = snd_soc_read(codec, AK5558_02_CONTROL1);
+ format &= ~AK5558_DIF;
+
+ 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_update_bits(codec, AK5558_02_CONTROL1, AK5558_DIF, format);
+
+ return 0;
+}
+
+static int ak5558_set_dai_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+ int ndt = 0;
+
+ if (!mute)
+ return 0;
+
+ if (ak5558->fs != 0)
+ ndt = 583000 / ak5558->fs;
+
+ msleep(max(ndt, 5));
+
+ return 0;
+}
+
+static int ak5558_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ case SND_SOC_BIAS_PREPARE:
+ case SND_SOC_BIAS_STANDBY:
+ break;
+ case SND_SOC_BIAS_OFF:
+ snd_soc_write(codec, AK5558_00_POWER_MANAGEMENT1, 0x00);
+ break;
+ }
+ 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_codec *codec = dai->codec;
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+ int tdm_mode;
+ int reg;
+
+ 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;
+ }
+
+ reg = snd_soc_read(codec, AK5558_03_CONTROL2);
+ reg &= ~AK5558_MODE_BITS;
+ reg |= tdm_mode;
+ snd_soc_write(codec, AK5558_03_CONTROL2, reg);
+
+ 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 struct snd_soc_dai_ops ak5558_dai_ops = {
+ .startup = ak5558_startup,
+ .hw_params = ak5558_hw_params,
+
+ .set_sysclk = ak5558_set_dai_sysclk,
+ .set_fmt = ak5558_set_dai_fmt,
+ .digital_mute = ak5558_set_dai_mute,
+ .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_init_reg(struct snd_soc_codec *codec)
+{
+ int ret;
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+
+ usleep_range(10000, 11000);
+
+ ak5558_power_off(ak5558);
+ ak5558_power_on(ak5558);
+
+ ret = snd_soc_write(codec, AK5558_00_POWER_MANAGEMENT1, 0x0);
+ if (ret < 0)
+ return ret;
+
+ return snd_soc_update_bits(codec, AK5558_02_CONTROL1, AK5558_CKS,
+ AK5558_CKS_AUTO);
+}
+
+static int ak5558_probe(struct snd_soc_codec *codec)
+{
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+
+ ak5558->fs = 48000;
+ ak5558->rclk = 0;
+
+ return ak5558_init_reg(codec);
+}
+
+static int ak5558_remove(struct snd_soc_codec *codec)
+{
+ struct ak5558_priv *ak5558 = snd_soc_codec_get_drvdata(codec);
+
+ ak5558_set_bias_level(codec, SND_SOC_BIAS_OFF);
+ ak5558_power_off(ak5558);
+
+ return 0;
+}
+
+
+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);
+}
+
+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)
+};
+
+struct snd_soc_codec_driver soc_codec_dev_ak5558 = {
+ .probe = ak5558_probe,
+ .remove = ak5558_remove,
+ .idle_bias_off = true,
+ .set_bias_level = ak5558_set_bias_level,
+
+ .component_driver = {
+ .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),
+ },
+};
+
+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 = snd_soc_register_codec(&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)
+{
+ snd_soc_unregister_codec(&i2c->dev);
+ 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");
diff --git a/sound/soc/codecs/ak5558.h b/sound/soc/codecs/ak5558.h
new file mode 100644
index 0000000..2ed4c7c
--- /dev/null
+++ b/sound/soc/codecs/ak5558.h
@@ -0,0 +1,52 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Audio driver header for AK5558
+ *
+ * Copyright (C) 2016 Asahi Kasei Microdevices Corporation
+ * Copyright 2018 NXP
+ */
+
+#ifndef _AK5558_H
+#define _AK5558_H
+
+#define AK5558_00_POWER_MANAGEMENT1 0x00
+#define AK5558_01_POWER_MANAGEMENT2 0x01
+#define AK5558_02_CONTROL1 0x02
+#define AK5558_03_CONTROL2 0x03
+#define AK5558_04_CONTROL3 0x04
+#define AK5558_05_DSD 0x05
+
+/* AK5558_02_CONTROL1 fields */
+#define AK5558_DIF GENMASK(1, 1)
+#define AK5558_DIF_MSB_MODE (0 << 1)
+#define AK5558_DIF_I2S_MODE (1 << 1)
+
+#define AK5558_BITS GENMASK(2, 2)
+#define AK5558_DIF_24BIT_MODE (0 << 2)
+#define AK5558_DIF_32BIT_MODE (1 << 2)
+
+#define AK5558_CKS GENMASK(6, 3)
+#define AK5558_CKS_128FS_192KHZ (0 << 3)
+#define AK5558_CKS_192FS_192KHZ (1 << 3)
+#define AK5558_CKS_256FS_48KHZ (2 << 3)
+#define AK5558_CKS_256FS_96KHZ (3 << 3)
+#define AK5558_CKS_384FS_96KHZ (4 << 3)
+#define AK5558_CKS_384FS_48KHZ (5 << 3)
+#define AK5558_CKS_512FS_48KHZ (6 << 3)
+#define AK5558_CKS_768FS_48KHZ (7 << 3)
+#define AK5558_CKS_64FS_384KHZ (8 << 3)
+#define AK5558_CKS_32FS_768KHZ (9 << 3)
+#define AK5558_CKS_96FS_384KHZ (10 << 3)
+#define AK5558_CKS_48FS_768KHZ (11 << 3)
+#define AK5558_CKS_64FS_768KHZ (12 << 3)
+#define AK5558_CKS_1024FS_16KHZ (13 << 3)
+#define AK5558_CKS_AUTO (15 << 3)
+
+/* AK5558_03_CONTROL2 fields */
+#define AK5558_MODE_BITS GENMASK(6, 5)
+#define AK5558_MODE_NORMAL (0 << 5)
+#define AK5558_MODE_TDM128 (1 << 5)
+#define AK5558_MODE_TDM256 (2 << 5)
+#define AK5558_MODE_TDM512 (3 << 5)
+
+#endif
--
2.7.4
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