v4.19.13 snapshot.
diff --git a/sound/soc/codecs/ak4458.c b/sound/soc/codecs/ak4458.c
new file mode 100644
index 0000000..299ada4
--- /dev/null
+++ b/sound/soc/codecs/ak4458.c
@@ -0,0 +1,657 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Audio driver for AK4458 DAC
+//
+// Copyright (C) 2016 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/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <sound/initval.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+
+#include "ak4458.h"
+
+/* AK4458 Codec Private Data */
+struct ak4458_priv {
+ struct device *dev;
+ struct regmap *regmap;
+ struct gpio_desc *reset_gpiod;
+ struct gpio_desc *mute_gpiod;
+ int digfil; /* SSLOW, SD, SLOW bits */
+ int fs; /* sampling rate */
+ int fmt;
+ int slots;
+ int slot_width;
+};
+
+static const struct reg_default ak4458_reg_defaults[] = {
+ { 0x00, 0x0C }, /* 0x00 AK4458_00_CONTROL1 */
+ { 0x01, 0x22 }, /* 0x01 AK4458_01_CONTROL2 */
+ { 0x02, 0x00 }, /* 0x02 AK4458_02_CONTROL3 */
+ { 0x03, 0xFF }, /* 0x03 AK4458_03_LCHATT */
+ { 0x04, 0xFF }, /* 0x04 AK4458_04_RCHATT */
+ { 0x05, 0x00 }, /* 0x05 AK4458_05_CONTROL4 */
+ { 0x06, 0x00 }, /* 0x06 AK4458_06_DSD1 */
+ { 0x07, 0x03 }, /* 0x07 AK4458_07_CONTROL5 */
+ { 0x08, 0x00 }, /* 0x08 AK4458_08_SOUND_CONTROL */
+ { 0x09, 0x00 }, /* 0x09 AK4458_09_DSD2 */
+ { 0x0A, 0x0D }, /* 0x0A AK4458_0A_CONTROL6 */
+ { 0x0B, 0x0C }, /* 0x0B AK4458_0B_CONTROL7 */
+ { 0x0C, 0x00 }, /* 0x0C AK4458_0C_CONTROL8 */
+ { 0x0D, 0x00 }, /* 0x0D AK4458_0D_CONTROL9 */
+ { 0x0E, 0x50 }, /* 0x0E AK4458_0E_CONTROL10 */
+ { 0x0F, 0xFF }, /* 0x0F AK4458_0F_L2CHATT */
+ { 0x10, 0xFF }, /* 0x10 AK4458_10_R2CHATT */
+ { 0x11, 0xFF }, /* 0x11 AK4458_11_L3CHATT */
+ { 0x12, 0xFF }, /* 0x12 AK4458_12_R3CHATT */
+ { 0x13, 0xFF }, /* 0x13 AK4458_13_L4CHATT */
+ { 0x14, 0xFF }, /* 0x14 AK4458_14_R4CHATT */
+};
+
+/*
+ * Volume control:
+ * from -127 to 0 dB in 0.5 dB steps (mute instead of -127.5 dB)
+ */
+static DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
+
+/*
+ * DEM1 bit DEM0 bit Mode
+ * 0 0 44.1kHz
+ * 0 1 OFF (default)
+ * 1 0 48kHz
+ * 1 1 32kHz
+ */
+static const char * const ak4458_dem_select_texts[] = {
+ "44.1kHz", "OFF", "48kHz", "32kHz"
+};
+
+/*
+ * SSLOW, SD, SLOW bits Digital Filter Setting
+ * 0, 0, 0 : Sharp Roll-Off Filter
+ * 0, 0, 1 : Slow Roll-Off Filter
+ * 0, 1, 0 : Short delay Sharp Roll-Off Filter
+ * 0, 1, 1 : Short delay Slow Roll-Off Filter
+ * 1, *, * : Super Slow Roll-Off Filter
+ */
+static const char * const ak4458_digfil_select_texts[] = {
+ "Sharp Roll-Off Filter",
+ "Slow Roll-Off Filter",
+ "Short delay Sharp Roll-Off Filter",
+ "Short delay Slow Roll-Off Filter",
+ "Super Slow Roll-Off Filter"
+};
+
+/*
+ * DZFB: Inverting Enable of DZF
+ * 0: DZF goes H at Zero Detection
+ * 1: DZF goes L at Zero Detection
+ */
+static const char * const ak4458_dzfb_select_texts[] = {"H", "L"};
+
+/*
+ * SC1-0 bits: Sound Mode Setting
+ * 0 0 : Sound Mode 0
+ * 0 1 : Sound Mode 1
+ * 1 0 : Sound Mode 2
+ * 1 1 : Reserved
+ */
+static const char * const ak4458_sc_select_texts[] = {
+ "Sound Mode 0", "Sound Mode 1", "Sound Mode 2"
+};
+
+/* FIR2-0 bits: FIR Filter Mode Setting */
+static const char * const ak4458_fir_select_texts[] = {
+ "Mode 0", "Mode 1", "Mode 2", "Mode 3",
+ "Mode 4", "Mode 5", "Mode 6", "Mode 7",
+};
+
+/* ATS1-0 bits Attenuation Speed */
+static const char * const ak4458_ats_select_texts[] = {
+ "4080/fs", "2040/fs", "510/fs", "255/fs",
+};
+
+/* DIF2 bit Audio Interface Format Setting(BICK fs) */
+static const char * const ak4458_dif_select_texts[] = {"32fs,48fs", "64fs",};
+
+static const struct soc_enum ak4458_dac1_dem_enum =
+ SOC_ENUM_SINGLE(AK4458_01_CONTROL2, 1,
+ ARRAY_SIZE(ak4458_dem_select_texts),
+ ak4458_dem_select_texts);
+static const struct soc_enum ak4458_dac2_dem_enum =
+ SOC_ENUM_SINGLE(AK4458_0A_CONTROL6, 0,
+ ARRAY_SIZE(ak4458_dem_select_texts),
+ ak4458_dem_select_texts);
+static const struct soc_enum ak4458_dac3_dem_enum =
+ SOC_ENUM_SINGLE(AK4458_0E_CONTROL10, 4,
+ ARRAY_SIZE(ak4458_dem_select_texts),
+ ak4458_dem_select_texts);
+static const struct soc_enum ak4458_dac4_dem_enum =
+ SOC_ENUM_SINGLE(AK4458_0E_CONTROL10, 6,
+ ARRAY_SIZE(ak4458_dem_select_texts),
+ ak4458_dem_select_texts);
+static const struct soc_enum ak4458_digfil_enum =
+ SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(ak4458_digfil_select_texts),
+ ak4458_digfil_select_texts);
+static const struct soc_enum ak4458_dzfb_enum =
+ SOC_ENUM_SINGLE(AK4458_02_CONTROL3, 2,
+ ARRAY_SIZE(ak4458_dzfb_select_texts),
+ ak4458_dzfb_select_texts);
+static const struct soc_enum ak4458_sm_enum =
+ SOC_ENUM_SINGLE(AK4458_08_SOUND_CONTROL, 0,
+ ARRAY_SIZE(ak4458_sc_select_texts),
+ ak4458_sc_select_texts);
+static const struct soc_enum ak4458_fir_enum =
+ SOC_ENUM_SINGLE(AK4458_0C_CONTROL8, 0,
+ ARRAY_SIZE(ak4458_fir_select_texts),
+ ak4458_fir_select_texts);
+static const struct soc_enum ak4458_ats_enum =
+ SOC_ENUM_SINGLE(AK4458_0B_CONTROL7, 6,
+ ARRAY_SIZE(ak4458_ats_select_texts),
+ ak4458_ats_select_texts);
+static const struct soc_enum ak4458_dif_enum =
+ SOC_ENUM_SINGLE(AK4458_00_CONTROL1, 3,
+ ARRAY_SIZE(ak4458_dif_select_texts),
+ ak4458_dif_select_texts);
+
+static int get_digfil(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+
+ ucontrol->value.enumerated.item[0] = ak4458->digfil;
+
+ return 0;
+}
+
+static int set_digfil(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_component *component = snd_soc_kcontrol_component(kcontrol);
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+ int num;
+
+ num = ucontrol->value.enumerated.item[0];
+ if (num > 4)
+ return -EINVAL;
+
+ ak4458->digfil = num;
+
+ /* write SD bit */
+ snd_soc_component_update_bits(component, AK4458_01_CONTROL2,
+ AK4458_SD_MASK,
+ ((ak4458->digfil & 0x02) << 4));
+
+ /* write SLOW bit */
+ snd_soc_component_update_bits(component, AK4458_02_CONTROL3,
+ AK4458_SLOW_MASK,
+ (ak4458->digfil & 0x01));
+
+ /* write SSLOW bit */
+ snd_soc_component_update_bits(component, AK4458_05_CONTROL4,
+ AK4458_SSLOW_MASK,
+ ((ak4458->digfil & 0x04) >> 2));
+
+ return 0;
+}
+
+static const struct snd_kcontrol_new ak4458_snd_controls[] = {
+ SOC_DOUBLE_R_TLV("DAC1 Playback Volume", AK4458_03_LCHATT,
+ AK4458_04_RCHATT, 0, 0xFF, 0, dac_tlv),
+ SOC_DOUBLE_R_TLV("DAC2 Playback Volume", AK4458_0F_L2CHATT,
+ AK4458_10_R2CHATT, 0, 0xFF, 0, dac_tlv),
+ SOC_DOUBLE_R_TLV("DAC3 Playback Volume", AK4458_11_L3CHATT,
+ AK4458_12_R3CHATT, 0, 0xFF, 0, dac_tlv),
+ SOC_DOUBLE_R_TLV("DAC4 Playback Volume", AK4458_13_L4CHATT,
+ AK4458_14_R4CHATT, 0, 0xFF, 0, dac_tlv),
+ SOC_ENUM("AK4458 De-emphasis Response DAC1", ak4458_dac1_dem_enum),
+ SOC_ENUM("AK4458 De-emphasis Response DAC2", ak4458_dac2_dem_enum),
+ SOC_ENUM("AK4458 De-emphasis Response DAC3", ak4458_dac3_dem_enum),
+ SOC_ENUM("AK4458 De-emphasis Response DAC4", ak4458_dac4_dem_enum),
+ SOC_ENUM_EXT("AK4458 Digital Filter Setting", ak4458_digfil_enum,
+ get_digfil, set_digfil),
+ SOC_ENUM("AK4458 Inverting Enable of DZFB", ak4458_dzfb_enum),
+ SOC_ENUM("AK4458 Sound Mode", ak4458_sm_enum),
+ SOC_ENUM("AK4458 FIR Filter Mode Setting", ak4458_fir_enum),
+ SOC_ENUM("AK4458 Attenuation transition Time Setting",
+ ak4458_ats_enum),
+ SOC_ENUM("AK4458 BICK fs Setting", ak4458_dif_enum),
+};
+
+/* ak4458 dapm widgets */
+static const struct snd_soc_dapm_widget ak4458_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("AK4458 DAC1", NULL, AK4458_0A_CONTROL6, 2, 0),/*pw*/
+ SND_SOC_DAPM_AIF_IN("AK4458 SDTI", "Playback", 0, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_OUTPUT("AK4458 AOUTA"),
+
+ SND_SOC_DAPM_DAC("AK4458 DAC2", NULL, AK4458_0A_CONTROL6, 3, 0),/*pw*/
+ SND_SOC_DAPM_OUTPUT("AK4458 AOUTB"),
+
+ SND_SOC_DAPM_DAC("AK4458 DAC3", NULL, AK4458_0B_CONTROL7, 2, 0),/*pw*/
+ SND_SOC_DAPM_OUTPUT("AK4458 AOUTC"),
+
+ SND_SOC_DAPM_DAC("AK4458 DAC4", NULL, AK4458_0B_CONTROL7, 3, 0),/*pw*/
+ SND_SOC_DAPM_OUTPUT("AK4458 AOUTD"),
+};
+
+static const struct snd_soc_dapm_route ak4458_intercon[] = {
+ {"AK4458 DAC1", NULL, "AK4458 SDTI"},
+ {"AK4458 AOUTA", NULL, "AK4458 DAC1"},
+
+ {"AK4458 DAC2", NULL, "AK4458 SDTI"},
+ {"AK4458 AOUTB", NULL, "AK4458 DAC2"},
+
+ {"AK4458 DAC3", NULL, "AK4458 SDTI"},
+ {"AK4458 AOUTC", NULL, "AK4458 DAC3"},
+
+ {"AK4458 DAC4", NULL, "AK4458 SDTI"},
+ {"AK4458 AOUTD", NULL, "AK4458 DAC4"},
+};
+
+static int ak4458_rstn_control(struct snd_soc_component *component, int bit)
+{
+ int ret;
+
+ if (bit)
+ ret = snd_soc_component_update_bits(component,
+ AK4458_00_CONTROL1,
+ AK4458_RSTN_MASK,
+ 0x1);
+ else
+ ret = snd_soc_component_update_bits(component,
+ AK4458_00_CONTROL1,
+ AK4458_RSTN_MASK,
+ 0x0);
+ return ret;
+}
+
+static int ak4458_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 ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+ int pcm_width = max(params_physical_width(params), ak4458->slot_width);
+ int nfs1;
+ u8 format;
+
+ nfs1 = params_rate(params);
+ ak4458->fs = nfs1;
+
+ /* Master Clock Frequency Auto Setting Mode Enable */
+ snd_soc_component_update_bits(component, AK4458_00_CONTROL1, 0x80, 0x80);
+
+ switch (pcm_width) {
+ case 16:
+ if (ak4458->fmt == SND_SOC_DAIFMT_I2S)
+ format = AK4458_DIF_24BIT_I2S;
+ else
+ format = AK4458_DIF_16BIT_LSB;
+ break;
+ case 32:
+ switch (ak4458->fmt) {
+ case SND_SOC_DAIFMT_I2S:
+ format = AK4458_DIF_32BIT_I2S;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ format = AK4458_DIF_32BIT_MSB;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ format = AK4458_DIF_32BIT_LSB;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ format = AK4458_DIF_32BIT_MSB;
+ break;
+ default:
+ return -EINVAL;
+ }
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ snd_soc_component_update_bits(component, AK4458_00_CONTROL1,
+ AK4458_DIF_MASK, format);
+
+ ak4458_rstn_control(component, 0);
+ ak4458_rstn_control(component, 1);
+
+ return 0;
+}
+
+static int ak4458_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS: /* Slave Mode */
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM: /* Master Mode is not supported */
+ case SND_SOC_DAIFMT_CBS_CFM:
+ case SND_SOC_DAIFMT_CBM_CFS:
+ default:
+ dev_err(component->dev, "Master mode unsupported\n");
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ case SND_SOC_DAIFMT_LEFT_J:
+ case SND_SOC_DAIFMT_RIGHT_J:
+ case SND_SOC_DAIFMT_DSP_B:
+ ak4458->fmt = fmt & SND_SOC_DAIFMT_FORMAT_MASK;
+ break;
+ default:
+ dev_err(component->dev, "Audio format 0x%02X unsupported\n",
+ fmt & SND_SOC_DAIFMT_FORMAT_MASK);
+ return -EINVAL;
+ }
+
+ ak4458_rstn_control(component, 0);
+ ak4458_rstn_control(component, 1);
+
+ return 0;
+}
+
+static const int att_speed[] = { 4080, 2040, 510, 255 };
+
+static int ak4458_set_dai_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct snd_soc_component *component = dai->component;
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+ int nfs, ndt, ret, reg;
+ int ats;
+
+ nfs = ak4458->fs;
+
+ reg = snd_soc_component_read32(component, AK4458_0B_CONTROL7);
+ ats = (reg & AK4458_ATS_MASK) >> AK4458_ATS_SHIFT;
+
+ ndt = att_speed[ats] / (nfs / 1000);
+
+ if (mute) {
+ ret = snd_soc_component_update_bits(component, AK4458_01_CONTROL2, 0x01, 1);
+ mdelay(ndt);
+ if (ak4458->mute_gpiod)
+ gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
+ } else {
+ if (ak4458->mute_gpiod)
+ gpiod_set_value_cansleep(ak4458->mute_gpiod, 0);
+ ret = snd_soc_component_update_bits(component, AK4458_01_CONTROL2, 0x01, 0);
+ mdelay(ndt);
+ }
+
+ return 0;
+}
+
+static int ak4458_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 ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+ int mode;
+
+ ak4458->slots = slots;
+ ak4458->slot_width = slot_width;
+
+ switch (slots * slot_width) {
+ case 128:
+ mode = AK4458_MODE_TDM128;
+ break;
+ case 256:
+ mode = AK4458_MODE_TDM256;
+ break;
+ case 512:
+ mode = AK4458_MODE_TDM512;
+ break;
+ default:
+ mode = AK4458_MODE_NORMAL;
+ break;
+ }
+
+ snd_soc_component_update_bits(component, AK4458_0A_CONTROL6,
+ AK4458_MODE_MASK,
+ mode);
+
+ return 0;
+}
+
+#define AK4458_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
+ SNDRV_PCM_FMTBIT_S24_LE |\
+ SNDRV_PCM_FMTBIT_S32_LE)
+
+static const unsigned int ak4458_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 ak4458_rate_constraints = {
+ .count = ARRAY_SIZE(ak4458_rates),
+ .list = ak4458_rates,
+};
+
+static int ak4458_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ int ret;
+
+ ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ &ak4458_rate_constraints);
+
+ return ret;
+}
+
+static struct snd_soc_dai_ops ak4458_dai_ops = {
+ .startup = ak4458_startup,
+ .hw_params = ak4458_hw_params,
+ .set_fmt = ak4458_set_dai_fmt,
+ .digital_mute = ak4458_set_dai_mute,
+ .set_tdm_slot = ak4458_set_tdm_slot,
+};
+
+static struct snd_soc_dai_driver ak4458_dai = {
+ .name = "ak4458-aif",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 1,
+ .channels_max = 8,
+ .rates = SNDRV_PCM_RATE_KNOT,
+ .formats = AK4458_FORMATS,
+ },
+ .ops = &ak4458_dai_ops,
+};
+
+static void ak4458_power_off(struct ak4458_priv *ak4458)
+{
+ if (ak4458->reset_gpiod) {
+ gpiod_set_value_cansleep(ak4458->reset_gpiod, 0);
+ usleep_range(1000, 2000);
+ }
+}
+
+static void ak4458_power_on(struct ak4458_priv *ak4458)
+{
+ if (ak4458->reset_gpiod) {
+ gpiod_set_value_cansleep(ak4458->reset_gpiod, 1);
+ usleep_range(1000, 2000);
+ }
+}
+
+static void ak4458_init(struct snd_soc_component *component)
+{
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+
+ /* External Mute ON */
+ if (ak4458->mute_gpiod)
+ gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
+
+ ak4458_power_on(ak4458);
+
+ snd_soc_component_update_bits(component, AK4458_00_CONTROL1,
+ 0x80, 0x80); /* ACKS bit = 1; 10000000 */
+
+ ak4458_rstn_control(component, 1);
+}
+
+static int ak4458_probe(struct snd_soc_component *component)
+{
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+
+ ak4458_init(component);
+
+ ak4458->fs = 48000;
+
+ return 0;
+}
+
+static void ak4458_remove(struct snd_soc_component *component)
+{
+ struct ak4458_priv *ak4458 = snd_soc_component_get_drvdata(component);
+
+ ak4458_power_off(ak4458);
+}
+
+#ifdef CONFIG_PM
+static int __maybe_unused ak4458_runtime_suspend(struct device *dev)
+{
+ struct ak4458_priv *ak4458 = dev_get_drvdata(dev);
+
+ regcache_cache_only(ak4458->regmap, true);
+
+ ak4458_power_off(ak4458);
+
+ if (ak4458->mute_gpiod)
+ gpiod_set_value_cansleep(ak4458->mute_gpiod, 0);
+
+ return 0;
+}
+
+static int __maybe_unused ak4458_runtime_resume(struct device *dev)
+{
+ struct ak4458_priv *ak4458 = dev_get_drvdata(dev);
+
+ if (ak4458->mute_gpiod)
+ gpiod_set_value_cansleep(ak4458->mute_gpiod, 1);
+
+ ak4458_power_off(ak4458);
+ ak4458_power_on(ak4458);
+
+ regcache_cache_only(ak4458->regmap, false);
+ regcache_mark_dirty(ak4458->regmap);
+
+ return regcache_sync(ak4458->regmap);
+}
+#endif /* CONFIG_PM */
+
+static const struct snd_soc_component_driver soc_codec_dev_ak4458 = {
+ .probe = ak4458_probe,
+ .remove = ak4458_remove,
+ .controls = ak4458_snd_controls,
+ .num_controls = ARRAY_SIZE(ak4458_snd_controls),
+ .dapm_widgets = ak4458_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ak4458_dapm_widgets),
+ .dapm_routes = ak4458_intercon,
+ .num_dapm_routes = ARRAY_SIZE(ak4458_intercon),
+ .idle_bias_on = 1,
+ .use_pmdown_time = 1,
+ .endianness = 1,
+ .non_legacy_dai_naming = 1,
+};
+
+static const struct regmap_config ak4458_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = AK4458_14_R4CHATT,
+ .reg_defaults = ak4458_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(ak4458_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static const struct dev_pm_ops ak4458_pm = {
+ SET_RUNTIME_PM_OPS(ak4458_runtime_suspend, ak4458_runtime_resume, NULL)
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+};
+
+static int ak4458_i2c_probe(struct i2c_client *i2c)
+{
+ struct ak4458_priv *ak4458;
+ int ret;
+
+ ak4458 = devm_kzalloc(&i2c->dev, sizeof(*ak4458), GFP_KERNEL);
+ if (!ak4458)
+ return -ENOMEM;
+
+ ak4458->regmap = devm_regmap_init_i2c(i2c, &ak4458_regmap);
+ if (IS_ERR(ak4458->regmap))
+ return PTR_ERR(ak4458->regmap);
+
+ i2c_set_clientdata(i2c, ak4458);
+ ak4458->dev = &i2c->dev;
+
+ ak4458->reset_gpiod = devm_gpiod_get_optional(ak4458->dev, "reset",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ak4458->reset_gpiod))
+ return PTR_ERR(ak4458->reset_gpiod);
+
+ ak4458->mute_gpiod = devm_gpiod_get_optional(ak4458->dev, "mute",
+ GPIOD_OUT_LOW);
+ if (IS_ERR(ak4458->mute_gpiod))
+ return PTR_ERR(ak4458->mute_gpiod);
+
+ ret = devm_snd_soc_register_component(ak4458->dev, &soc_codec_dev_ak4458,
+ &ak4458_dai, 1);
+ if (ret < 0) {
+ dev_err(ak4458->dev, "Failed to register CODEC: %d\n", ret);
+ return ret;
+ }
+
+ pm_runtime_enable(&i2c->dev);
+
+ return 0;
+}
+
+static int ak4458_i2c_remove(struct i2c_client *i2c)
+{
+ pm_runtime_disable(&i2c->dev);
+
+ return 0;
+}
+
+static const struct of_device_id ak4458_of_match[] = {
+ { .compatible = "asahi-kasei,ak4458", },
+ { },
+};
+
+static struct i2c_driver ak4458_i2c_driver = {
+ .driver = {
+ .name = "ak4458",
+ .pm = &ak4458_pm,
+ .of_match_table = ak4458_of_match,
+ },
+ .probe_new = ak4458_i2c_probe,
+ .remove = ak4458_i2c_remove,
+};
+
+module_i2c_driver(ak4458_i2c_driver);
+
+MODULE_AUTHOR("Junichi Wakasugi <wakasugi.jb@om.asahi-kasei.co.jp>");
+MODULE_AUTHOR("Mihai Serban <mihai.serban@nxp.com>");
+MODULE_DESCRIPTION("ASoC AK4458 DAC driver");
+MODULE_LICENSE("GPL v2");