// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Based on code by Hu Jin
* Copyright (C) 2014 Asahi Kasei Microdevices Corporation
*/
#include <linux/delay.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <sound/soc.h>
#include <sound/tlv.h>
/* Registers and fields */
#define AK4375_00_POWER_MANAGEMENT1 0x00
#define PMPLL BIT(0) /* 0: PLL off, 1: PLL on */
#define AK4375_01_POWER_MANAGEMENT2 0x01
#define PMCP1 BIT(0) /* Charge Pump 1: LDO1 and DAC */
#define PMCP2 BIT(1) /* Charge Pump 2: Class-G HP Amp */
#define PMLDO1P BIT(4)
#define PMLDO1N BIT(5)
#define PMLDO (PMLDO1P | PMLDO1N)
#define AK4375_02_POWER_MANAGEMENT3 0x02
#define AK4375_03_POWER_MANAGEMENT4 0x03
#define AK4375_04_OUTPUT_MODE_SETTING 0x04
#define AK4375_05_CLOCK_MODE_SELECT 0x05
#define FS_MASK GENMASK(4, 0)
#define FS_8KHZ 0x00
#define FS_11_025KHZ 0x01
#define FS_16KHZ 0x04
#define FS_22_05KHZ 0x05
#define FS_32KHZ 0x08
#define FS_44_1KHZ 0x09
#define FS_48KHZ 0x0a
#define FS_88_2KHZ 0x0d
#define FS_96KHZ 0x0e
#define FS_176_4KHZ 0x11
#define FS_192KHZ 0x12
#define CM_MASK GENMASK(6, 5) /* For SRC Bypass mode */
#define CM_0 (0x0 << 5)
#define CM_1 (0x1 << 5)
#define CM_2 (0x2 << 5)
#define CM_3 (0x3 << 5)
#define AK4375_06_DIGITAL_FILTER_SELECT 0x06
#define DADFSEL BIT(5) /* 0: in SRC Bypass mode, 1: in SRC mode */
#define DASL BIT(6)
#define DASD BIT(7)
#define AK4375_07_DAC_MONO_MIXING 0x07
#define DACMUTE_MASK (GENMASK(5, 4) | GENMASK(1, 0)) /* Clear to mute */
#define AK4375_08_JITTER_CLEANER_SETTING1 0x08
#define AK4375_09_JITTER_CLEANER_SETTING2 0x09
#define AK4375_0A_JITTER_CLEANER_SETTING3 0x0a
#define SELDAIN BIT(1) /* 0: SRC Bypass mode, 1: SRC mode */
#define XCKSEL BIT(6) /* 0: PLL0, 1: MCKI */
#define XCKCPSEL BIT(7) /* Should be equal to SELDAIN and XCKSEL */
#define AK4375_0B_LCH_OUTPUT_VOLUME 0x0b
#define AK4375_0C_RCH_OUTPUT_VOLUME 0x0c
#define AK4375_0D_HP_VOLUME_CONTROL 0x0d
#define AK4375_0E_PLL_CLK_SOURCE_SELECT 0x0e
#define PLS BIT(0) /* 0: MCKI, 1: BCLK */
#define AK4375_0F_PLL_REF_CLK_DIVIDER1 0x0f /* Reference clock divider [15:8] bits */
#define AK4375_10_PLL_REF_CLK_DIVIDER2 0x10 /* Reference clock divider [7:0] bis */
#define AK4375_11_PLL_FB_CLK_DIVIDER1 0x11 /* Feedback clock divider [15:8] bits */
#define AK4375_12_PLL_FB_CLK_DIVIDER2 0x12 /* Feedback clock divider [7:0] bits */
#define AK4375_13_SRC_CLK_SOURCE 0x13 /* SRC Bypass: SRCCKS=XCKSEL=SELDAIN=0 */
#define SRCCKS BIT(0) /* SRC Clock source 0: MCKI, 1: PLL0 */
#define DIV BIT(4)
#define AK4375_14_DAC_CLK_DIVIDER 0x14
#define AK4375_15_AUDIO_IF_FORMAT 0x15
#define DEVICEID_MASK GENMASK(7, 5)
#define AK4375_24_MODE_CONTROL 0x24
#define AK4375_PLL_FREQ_OUT_112896000 112896000 /* 44.1 kHz base rate */
#define AK4375_PLL_FREQ_OUT_122880000 122880000 /* 32 and 48 kHz base rates */
#define DEVICEID_AK4375 0x00
#define DEVICEID_AK4375A 0x01
#define DEVICEID_AK4376A 0x02
#define DEVICEID_AK4377 0x03
#define DEVICEID_AK4331 0x07
static const char * const supply_names[] = {
"avdd", "tvdd"
};
struct ak4375_drvdata {
struct snd_soc_dai_driver *dai_drv;
const struct snd_soc_component_driver *comp_drv;
};
struct ak4375_priv {
struct device *dev;
struct regmap *regmap;
struct gpio_desc *pdn_gpiod;
struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
unsigned int rate;
unsigned int pld;
u8 mute_save;
};
static const struct reg_default ak4375_reg_defaults[] = {
{ 0x00, 0x00 }, { 0x01, 0x00 }, { 0x02, 0x00 },
{ 0x03, 0x00 }, { 0x04, 0x00 }, { 0x05, 0x00 },
{ 0x06, 0x00 }, { 0x07, 0x00 }, { 0x08, 0x00 },
{ 0x09, 0x00 }, { 0x0a, 0x00 }, { 0x0b, 0x19 },
{ 0x0c, 0x19 }, { 0x0d, 0x75 }, { 0x0e, 0x01 },
{ 0x0f, 0x00 }, { 0x10, 0x00 }, { 0x11, 0x00 },
{ 0x12, 0x00 }, { 0x13, 0x00 }, { 0x14, 0x00 },
{ 0x15, 0x00 }, { 0x24, 0x00 },
};
/*
* Output Digital volume control:
* from -12.5 to 3 dB in 0.5 dB steps (mute instead of -12.5 dB)
*/
static DECLARE_TLV_DB_SCALE(dac_tlv, -1250, 50, 0);
/*
* HP-Amp Analog volume control:
* from -4.2 to 6 dB in 2 dB steps (mute instead of -4.2 dB)
*/
static DECLARE_TLV_DB_SCALE(hpg_tlv, -4200, 20, 0);
static const char * const ak4375_ovolcn_select_texts[] = { "Dependent", "Independent" };
static const char * const ak4375_mdac_select_texts[] = { "x1", "x1/2" };
static const char * const ak4375_cpmode_select_texts[] = {
"Automatic Switching",
"+-VDD Operation",
"+-1/2VDD Operation"
};
/*
* DASD, DASL bits Digital Filter Setting
* 0, 0 : Sharp Roll-Off Filter
* 0, 1 : Slow Roll-Off Filter
* 1, 0 : Short delay Sharp Roll-Off Filter
* 1, 1 : Short delay Slow Roll-Off Filter
*/
static const char * const ak4375_digfil_select_texts[] = {
"Sharp Roll-Off Filter",
"Slow Roll-Off Filter",
"Short delay Sharp Roll-Off Filter",
"Short delay Slow Roll-Off Filter",
};
static const struct soc_enum ak4375_ovolcn_enum =
SOC_ENUM_SINGLE(AK4375_0B_LCH_OUTPUT_VOLUME, 7,
ARRAY_SIZE(ak4375_ovolcn_select_texts), ak4375_ovolcn_select_texts);
static const struct soc_enum ak4375_mdacl_enum =
SOC_ENUM_SINGLE(AK4375_07_DAC_MONO_MIXING, 2,
ARRAY_SIZE(ak4375_mdac_select_texts), ak4375_mdac_select_texts);
static const struct soc_enum ak4375_mdacr_enum =
SOC_ENUM_SINGLE(AK4375_07_DAC_MONO_MIXING, 6,
ARRAY_SIZE(ak4375_mdac_select_texts), ak4375_mdac_select_texts);
static const struct soc_enum ak4375_cpmode_enum =
SOC_ENUM_SINGLE(AK4375_03_POWER_MANAGEMENT4, 2,
ARRAY_SIZE(ak4375_cpmode_select_texts), ak4375_cpmode_select_texts);
static const struct soc_enum ak4375_digfil_enum =
SOC_ENUM_SINGLE(AK4375_06_DIGITAL_FILTER_SELECT, 6,
ARRAY_SIZE(ak4375_digfil_select_texts), ak4375_digfil_select_texts);
static const struct snd_kcontrol_new ak4375_snd_controls[] = {
SOC_DOUBLE_R_TLV("Digital Output Volume", AK4375_0B_LCH_OUTPUT_VOLUME,
AK4375_0C_RCH_OUTPUT_VOLUME, 0, 0x1f, 0, dac_tlv),
SOC_SINGLE_TLV("HP-Amp Analog Volume",
AK4375_0D_HP_VOLUME_CONTROL, 0, 0x1f, 0, hpg_tlv),
SOC_DOUBLE("DAC Signal Invert Switch", AK4375_07_DAC_MONO_MIXING, 3, 7, 1, 0),
SOC_ENUM("Digital Volume Control", ak4375_ovolcn_enum),
SOC_ENUM("DACL Signal Level", ak4375_mdacl_enum),
SOC_ENUM("DACR Signal Level", ak4375_mdacr_enum),
SOC_ENUM("Charge Pump Mode", ak4375_cpmode_enum),
SOC_ENUM("DAC Digital Filter Mode", ak4375_digfil_enum),
};
static const struct snd_kcontrol_new ak4375_hpl_mixer_controls[] = {
SOC_DAPM_SINGLE("LDACL Switch", AK4375_07_DAC_MONO_MIXING, 0, 1, 0),
SOC_DAPM_SINGLE("RDACL Switch", AK4375_07_DAC_MONO_MIXING, 1, 1, 0),
};
static const struct snd_kcontrol_new ak4375_hpr_mixer_controls[] = {
SOC_DAPM_SINGLE("LDACR Switch", AK4375_07_DAC_MONO_MIXING, 4, 1, 0),
SOC_DAPM_SINGLE("RDACR Switch", AK4375_07_DAC_MONO_MIXING, 5, 1, 0),
};
static int ak4375_dac_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm);
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
snd_soc_component_update_bits(component, AK4375_00_POWER_MANAGEMENT1, PMPLL, PMPLL);
snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP1, PMCP1);
usleep_range(6500, 7000);
snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMLDO, PMLDO);
usleep_range(1000, 2000);
break;
case SND_SOC_DAPM_POST_PMU:
snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP2, PMCP2);
usleep_range(4500, 5000);
break;
case SND_SOC_DAPM_PRE_PMD:
snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP2, 0x0);
break;
case SND_SOC_DAPM_POST_PMD:
snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMLDO, 0x0);
snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP1, 0x0);
snd_soc_component_update_bits(component, AK4375_00_POWER_MANAGEMENT1, PMPLL, 0x0);
break;
}
return 0;
}
static const struct snd_soc_dapm_widget ak4375_dapm_widgets[] = {
SND_SOC_DAPM_DAC_E("DAC", NULL, AK4375_02_POWER_MANAGEMENT3, 0, 0, ak4375_dac_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU |
SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_AIF_IN("SDTI", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_OUTPUT("HPL"),
SND_SOC_DAPM_OUTPUT("HPR"),
SND_SOC_DAPM_MIXER("HPR Mixer", AK4375_03_POWER_MANAGEMENT4, 1, 0,
&ak4375_hpr_mixer_controls[0], ARRAY_SIZE(ak4375_hpr_mixer_controls)),
SND_SOC_DAPM_MIXER("HPL Mixer", AK4375_03_POWER_MANAGEMENT4, 0, 0,
&ak4375_hpl_mixer_controls[0], ARRAY_SIZE(ak4375_hpl_mixer_controls)),
};
static const struct snd_soc_dapm_route ak4375_intercon[] = {
{ "DAC", NULL, "SDTI" },
{ "HPL Mixer", "LDACL Switch", "DAC" },
{ "HPL Mixer", "RDACL Switch", "DAC" },
{ "HPR Mixer", "LDACR Switch", "DAC" },
{ "HPR Mixer", "RDACR Switch", "DAC" },
{ "HPL", NULL, "HPL Mixer" },
{ "HPR", NULL, "HPR Mixer" },
};
static int ak4375_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 ak4375_priv *ak4375 = snd_soc_component_get_drvdata(component);
unsigned int freq_in, freq_out;
ak4375->rate = params_rate(params);
if (ak4375->rate <= 96000)
ak4375->pld = 0;
else
ak4375->pld = 1;
freq_in = 32 * ak4375->rate / (ak4375->pld + 1);
if ((ak4375->rate % 8000) == 0)
freq_out = AK4375_PLL_FREQ_OUT_122880000;
else
freq_out = AK4375_PLL_FREQ_OUT_112896000;
return snd_soc_dai_set_pll(dai, 0, 0, freq_in, freq_out);
}
static int ak4375_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
unsigned int freq_in, unsigned int freq_out)
{
struct snd_soc_component *component = dai->component;
struct ak4375_priv *ak4375 = snd_soc_component_get_drvdata(component);
unsigned int mclk, plm, mdiv, div;
u8 cms, fs, cm;
cms = snd_soc_component_read(component, AK4375_05_CLOCK_MODE_SELECT);
fs = cms & ~FS_MASK;
cm = cms & ~CM_MASK;
switch (ak4375->rate) {
case 8000:
fs |= FS_8KHZ;
break;
case 11025:
fs |= FS_11_025KHZ;
break;
case 16000:
fs |= FS_16KHZ;
break;
case 22050:
fs |= FS_22_05KHZ;
break;
case 32000:
fs |= FS_32KHZ;
break;
case 44100:
fs |= FS_44_1KHZ;
break;
case 48000:
fs |= FS_48KHZ;
break;
case 88200:
fs |= FS_88_2KHZ;
break;
case 96000:
fs |= FS_96KHZ;
break;
case 176400:
fs |= FS_176_4KHZ;
break;
case 192000:
fs |= FS_192KHZ;
break;
default:
return -EINVAL;
}
if (ak4375->rate <= 24000) {
cm |= CM_1;
mclk = 512 * ak4375->rate;
mdiv = freq_out / mclk - 1;
div = 0;
} else if (ak4375->rate <= 96000) {
cm |= CM_0;
mclk = 256 * ak4375->rate;
mdiv = freq_out / mclk - 1;
div = 0;
} else {
cm |= CM_3;
mclk = 128 * ak4375->rate;
mdiv = 4;
div = 1;
}
/* Writing both fields in one go seems to make playback choppy on start */
snd_soc_component_update_bits(component, AK4375_05_CLOCK_MODE_SELECT, FS_MASK, fs);
snd_soc_component_update_bits(component, AK4375_05_CLOCK_MODE_SELECT, CM_MASK, cm);
snd_soc_component_write(component, AK4375_0F_PLL_REF_CLK_DIVIDER1,
(ak4375->pld & 0xff00) >> 8);
snd_soc_component_write(component, AK4375_10_PLL_REF_CLK_DIVIDER2,
ak4375->pld & 0x00ff);
plm = freq_out / freq_in - 1;
snd_soc_component_write(component, AK4375_11_PLL_FB_CLK_DIVIDER1, (plm & 0xff00) >> 8);
snd_soc_component_write(component, AK4375_12_PLL_FB_CLK_DIVIDER2, plm & 0x00ff);
snd_soc_component_update_bits(component, AK4375_13_SRC_CLK_SOURCE, DIV, div);
/* SRCCKS bit: force to 1 for SRC PLL source clock */
snd_soc_component_update_bits(component, AK4375_13_SRC_CLK_SOURCE, SRCCKS, SRCCKS);
snd_soc_component_write(component, AK4375_14_DAC_CLK_DIVIDER, mdiv);
dev_dbg(ak4375->dev, "rate=%d mclk=%d f_in=%d f_out=%d PLD=%d PLM=%d MDIV=%d DIV=%d\n",
ak4375->rate, mclk, freq_in, freq_out, ak4375->pld, plm, mdiv, div);
return 0;
}
static int ak4375_mute(struct snd_soc_dai *dai, int mute, int direction)
{
struct snd_soc_component *component = dai->component;
struct ak4375_priv *ak4375 = snd_soc_component_get_drvdata(component);
u8 val = snd_soc_component_read(component, AK4375_07_DAC_MONO_MIXING);
dev_dbg(ak4375->dev, "mute=%d val=%d\n", mute, val);
if (mute) {
ak4375->mute_save = val & DACMUTE_MASK;
val &= ~DACMUTE_MASK;
} else {
val |= ak4375->mute_save;
}
snd_soc_component_write(component, AK4375_07_DAC_MONO_MIXING, val);
return 0;
}
#define AK4375_RATES (SNDRV_PCM_RATE_8000_48000 |\
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |\
SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
#define AK4375_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\
SNDRV_PCM_FMTBIT_S24_LE |\
SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops ak4375_dai_ops = {
.hw_params = ak4375_hw_params,
.mute_stream = ak4375_mute,
.set_pll = ak4375_dai_set_pll,
};
static struct snd_soc_dai_driver ak4375_dai = {
.name = "ak4375-hifi",
.playback = {
.stream_name = "HiFi Playback",
.channels_min = 1,
.channels_max = 2,
.rates = AK4375_RATES,
.rate_min = 8000,
.rate_max = 192000,
.formats = AK4375_FORMATS,
},
.ops = &ak4375_dai_ops,
};
static void ak4375_power_off(struct ak4375_priv *ak4375)
{
gpiod_set_value_cansleep(ak4375->pdn_gpiod, 0);
usleep_range(1000, 2000);
regulator_bulk_disable(ARRAY_SIZE(ak4375->supplies), ak4375->supplies);
}
static int ak4375_power_on(struct ak4375_priv *ak4375)
{
int ret;
ret = regulator_bulk_enable(ARRAY_SIZE(ak4375->supplies), ak4375->supplies);
if (ret < 0) {
dev_err(ak4375->dev, "Failed to enable regulators: %d\n", ret);
return ret;
}
usleep_range(3000, 4000);
gpiod_set_value_cansleep(ak4375->pdn_gpiod, 1);
usleep_range(1000, 2000);
return 0;
}
static int __maybe_unused ak4375_runtime_suspend(struct device *dev)
{
struct ak4375_priv *ak4375 = dev_get_drvdata(dev);
regcache_cache_only(ak4375->regmap, true);
ak4375_power_off(ak4375);
return 0;
}
static int __maybe_unused ak4375_runtime_resume(struct device *dev)
{
struct ak4375_priv *ak4375 = dev_get_drvdata(dev);
int ret;
ret = ak4375_power_on(ak4375);
if (ret < 0)
return ret;
regcache_cache_only(ak4375->regmap, false);
regcache_mark_dirty(ak4375->regmap);
return regcache_sync(ak4375->regmap);
}
static const struct snd_soc_component_driver soc_codec_dev_ak4375 = {
.controls = ak4375_snd_controls,
.num_controls = ARRAY_SIZE(ak4375_snd_controls),
.dapm_widgets = ak4375_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(ak4375_dapm_widgets),
.dapm_routes = ak4375_intercon,
.num_dapm_routes = ARRAY_SIZE(ak4375_intercon),
.idle_bias_on = 1,
.use_pmdown_time = 1,
.endianness = 1,
};
static const struct regmap_config ak4375_regmap = {
.reg_bits = 8,
.val_bits = 8,
.max_register = AK4375_24_MODE_CONTROL,
.reg_defaults = ak4375_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(ak4375_reg_defaults),
.cache_type = REGCACHE_RBTREE,
};
static const struct ak4375_drvdata ak4375_drvdata = {
.dai_drv = &ak4375_dai,
.comp_drv = &soc_codec_dev_ak4375,
};
static const struct dev_pm_ops ak4375_pm = {
SET_RUNTIME_PM_OPS(ak4375_runtime_suspend, ak4375_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
};
static int ak4375_i2c_probe(struct i2c_client *i2c)
{
struct ak4375_priv *ak4375;
const struct ak4375_drvdata *drvdata;
unsigned int deviceid;
int ret, i;
ak4375 = devm_kzalloc(&i2c->dev, sizeof(*ak4375), GFP_KERNEL);
if (!ak4375)
return -ENOMEM;
ak4375->regmap = devm_regmap_init_i2c(i2c, &ak4375_regmap);
if (IS_ERR(ak4375->regmap))
return PTR_ERR(ak4375->regmap);
i2c_set_clientdata(i2c, ak4375);
ak4375->dev = &i2c->dev;
drvdata = of_device_get_match_data(&i2c->dev);
for (i = 0; i < ARRAY_SIZE(supply_names); i++)
ak4375->supplies[i].supply = supply_names[i];
ret = devm_regulator_bulk_get(ak4375->dev, ARRAY_SIZE(ak4375->supplies), ak4375->supplies);
if (ret < 0) {
dev_err(ak4375->dev, "Failed to get regulators: %d\n", ret);
return ret;
}
ak4375->pdn_gpiod = devm_gpiod_get_optional(ak4375->dev, "pdn", GPIOD_OUT_LOW);
if (IS_ERR(ak4375->pdn_gpiod))
return dev_err_probe(ak4375->dev, PTR_ERR(ak4375->pdn_gpiod),
"failed to get pdn\n");
ret = ak4375_power_on(ak4375);
if (ret < 0)
return ret;
/* Don't read deviceid from cache */
regcache_cache_bypass(ak4375->regmap, true);
ret = regmap_read(ak4375->regmap, AK4375_15_AUDIO_IF_FORMAT, &deviceid);
if (ret < 0) {
dev_err(ak4375->dev, "unable to read DEVICEID!\n");
return ret;
}
regcache_cache_bypass(ak4375->regmap, false);
deviceid = (deviceid & DEVICEID_MASK) >> 5;
switch (deviceid) {
case DEVICEID_AK4331:
dev_err(ak4375->dev, "found untested AK4331\n");
return -EINVAL;
case DEVICEID_AK4375:
dev_dbg(ak4375->dev, "found AK4375\n");
break;
case DEVICEID_AK4375A:
dev_dbg(ak4375->dev, "found AK4375A\n");
break;
case DEVICEID_AK4376A:
dev_err(ak4375->dev, "found unsupported AK4376/A!\n");
return -EINVAL;
case DEVICEID_AK4377:
dev_err(ak4375->dev, "found unsupported AK4377!\n");
return -EINVAL;
default:
dev_err(ak4375->dev, "unrecognized DEVICEID!\n");
return -EINVAL;
}
pm_runtime_set_active(ak4375->dev);
pm_runtime_enable(ak4375->dev);
ret = devm_snd_soc_register_component(ak4375->dev, drvdata->comp_drv,
drvdata->dai_drv, 1);
if (ret < 0) {
dev_err(ak4375->dev, "Failed to register CODEC: %d\n", ret);
return ret;
}
return 0;
}
static void ak4375_i2c_remove(struct i2c_client *i2c)
{
pm_runtime_disable(&i2c->dev);
}
static const struct of_device_id ak4375_of_match[] = {
{ .compatible = "asahi-kasei,ak4375", .data = &ak4375_drvdata },
{ },
};
MODULE_DEVICE_TABLE(of, ak4375_of_match);
static struct i2c_driver ak4375_i2c_driver = {
.driver = {
.name = "ak4375",
.pm = &ak4375_pm,
.of_match_table = ak4375_of_match,
},
.probe = ak4375_i2c_probe,
.remove = ak4375_i2c_remove,
};
module_i2c_driver(ak4375_i2c_driver);
MODULE_AUTHOR("Vincent Knecht <[email protected]>");
MODULE_DESCRIPTION("ASoC AK4375 DAC driver");
MODULE_LICENSE("GPL");
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