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- // SPDX-License-Identifier: GPL-2.0
- //
- // ak4613.c -- Asahi Kasei ALSA Soc Audio driver
- //
- // Copyright (C) 2015 Renesas Electronics Corporation
- // Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
- //
- // Based on ak4642.c by Kuninori Morimoto
- // Based on wm8731.c by Richard Purdie
- // Based on ak4535.c by Richard Purdie
- // Based on wm8753.c by Liam Girdwood
- #include <linux/clk.h>
- #include <linux/delay.h>
- #include <linux/i2c.h>
- #include <linux/slab.h>
- #include <linux/of_device.h>
- #include <linux/module.h>
- #include <linux/regmap.h>
- #include <sound/soc.h>
- #include <sound/pcm_params.h>
- #include <sound/tlv.h>
- #define PW_MGMT1 0x00 /* Power Management 1 */
- #define PW_MGMT2 0x01 /* Power Management 2 */
- #define PW_MGMT3 0x02 /* Power Management 3 */
- #define CTRL1 0x03 /* Control 1 */
- #define CTRL2 0x04 /* Control 2 */
- #define DEMP1 0x05 /* De-emphasis1 */
- #define DEMP2 0x06 /* De-emphasis2 */
- #define OFD 0x07 /* Overflow Detect */
- #define ZRD 0x08 /* Zero Detect */
- #define ICTRL 0x09 /* Input Control */
- #define OCTRL 0x0a /* Output Control */
- #define LOUT1 0x0b /* LOUT1 Volume Control */
- #define ROUT1 0x0c /* ROUT1 Volume Control */
- #define LOUT2 0x0d /* LOUT2 Volume Control */
- #define ROUT2 0x0e /* ROUT2 Volume Control */
- #define LOUT3 0x0f /* LOUT3 Volume Control */
- #define ROUT3 0x10 /* ROUT3 Volume Control */
- #define LOUT4 0x11 /* LOUT4 Volume Control */
- #define ROUT4 0x12 /* ROUT4 Volume Control */
- #define LOUT5 0x13 /* LOUT5 Volume Control */
- #define ROUT5 0x14 /* ROUT5 Volume Control */
- #define LOUT6 0x15 /* LOUT6 Volume Control */
- #define ROUT6 0x16 /* ROUT6 Volume Control */
- /* PW_MGMT1 */
- #define RSTN BIT(0)
- #define PMDAC BIT(1)
- #define PMADC BIT(2)
- #define PMVR BIT(3)
- /* PW_MGMT2 */
- #define PMAD_ALL 0x7
- /* PW_MGMT3 */
- #define PMDA_ALL 0x3f
- /* CTRL1 */
- #define DIF0 BIT(3)
- #define DIF1 BIT(4)
- #define DIF2 BIT(5)
- #define TDM0 BIT(6)
- #define TDM1 BIT(7)
- #define NO_FMT (0xff)
- #define FMT_MASK (0xf8)
- /* CTRL2 */
- #define DFS_MASK (3 << 2)
- #define DFS_NORMAL_SPEED (0 << 2)
- #define DFS_DOUBLE_SPEED (1 << 2)
- #define DFS_QUAD_SPEED (2 << 2)
- /* ICTRL */
- #define ICTRL_MASK (0x3)
- /* OCTRL */
- #define OCTRL_MASK (0x3F)
- struct ak4613_formats {
- unsigned int width;
- unsigned int fmt;
- };
- struct ak4613_interface {
- struct ak4613_formats capture;
- struct ak4613_formats playback;
- };
- struct ak4613_priv {
- struct mutex lock;
- const struct ak4613_interface *iface;
- struct snd_pcm_hw_constraint_list constraint;
- struct work_struct dummy_write_work;
- struct snd_soc_component *component;
- unsigned int rate;
- unsigned int sysclk;
- unsigned int fmt;
- u8 oc;
- u8 ic;
- int cnt;
- };
- /*
- * Playback Volume
- *
- * max : 0x00 : 0 dB
- * ( 0.5 dB step )
- * min : 0xFE : -127.0 dB
- * mute: 0xFF
- */
- static const DECLARE_TLV_DB_SCALE(out_tlv, -12750, 50, 1);
- static const struct snd_kcontrol_new ak4613_snd_controls[] = {
- SOC_DOUBLE_R_TLV("Digital Playback Volume1", LOUT1, ROUT1,
- 0, 0xFF, 1, out_tlv),
- SOC_DOUBLE_R_TLV("Digital Playback Volume2", LOUT2, ROUT2,
- 0, 0xFF, 1, out_tlv),
- SOC_DOUBLE_R_TLV("Digital Playback Volume3", LOUT3, ROUT3,
- 0, 0xFF, 1, out_tlv),
- SOC_DOUBLE_R_TLV("Digital Playback Volume4", LOUT4, ROUT4,
- 0, 0xFF, 1, out_tlv),
- SOC_DOUBLE_R_TLV("Digital Playback Volume5", LOUT5, ROUT5,
- 0, 0xFF, 1, out_tlv),
- SOC_DOUBLE_R_TLV("Digital Playback Volume6", LOUT6, ROUT6,
- 0, 0xFF, 1, out_tlv),
- };
- static const struct reg_default ak4613_reg[] = {
- { 0x0, 0x0f }, { 0x1, 0x07 }, { 0x2, 0x3f }, { 0x3, 0x20 },
- { 0x4, 0x20 }, { 0x5, 0x55 }, { 0x6, 0x05 }, { 0x7, 0x07 },
- { 0x8, 0x0f }, { 0x9, 0x07 }, { 0xa, 0x3f }, { 0xb, 0x00 },
- { 0xc, 0x00 }, { 0xd, 0x00 }, { 0xe, 0x00 }, { 0xf, 0x00 },
- { 0x10, 0x00 }, { 0x11, 0x00 }, { 0x12, 0x00 }, { 0x13, 0x00 },
- { 0x14, 0x00 }, { 0x15, 0x00 }, { 0x16, 0x00 },
- };
- #define AUDIO_IFACE_TO_VAL(fmts) ((fmts - ak4613_iface) << 3)
- #define AUDIO_IFACE(b, fmt) { b, SND_SOC_DAIFMT_##fmt }
- static const struct ak4613_interface ak4613_iface[] = {
- /* capture */ /* playback */
- /* [0] - [2] are not supported */
- [3] = { AUDIO_IFACE(24, LEFT_J), AUDIO_IFACE(24, LEFT_J) },
- [4] = { AUDIO_IFACE(24, I2S), AUDIO_IFACE(24, I2S) },
- };
- static const struct regmap_config ak4613_regmap_cfg = {
- .reg_bits = 8,
- .val_bits = 8,
- .max_register = 0x16,
- .reg_defaults = ak4613_reg,
- .num_reg_defaults = ARRAY_SIZE(ak4613_reg),
- .cache_type = REGCACHE_RBTREE,
- };
- static const struct of_device_id ak4613_of_match[] = {
- { .compatible = "asahi-kasei,ak4613", .data = &ak4613_regmap_cfg },
- {},
- };
- MODULE_DEVICE_TABLE(of, ak4613_of_match);
- static const struct i2c_device_id ak4613_i2c_id[] = {
- { "ak4613", (kernel_ulong_t)&ak4613_regmap_cfg },
- { }
- };
- MODULE_DEVICE_TABLE(i2c, ak4613_i2c_id);
- static const struct snd_soc_dapm_widget ak4613_dapm_widgets[] = {
- /* Outputs */
- SND_SOC_DAPM_OUTPUT("LOUT1"),
- SND_SOC_DAPM_OUTPUT("LOUT2"),
- SND_SOC_DAPM_OUTPUT("LOUT3"),
- SND_SOC_DAPM_OUTPUT("LOUT4"),
- SND_SOC_DAPM_OUTPUT("LOUT5"),
- SND_SOC_DAPM_OUTPUT("LOUT6"),
- SND_SOC_DAPM_OUTPUT("ROUT1"),
- SND_SOC_DAPM_OUTPUT("ROUT2"),
- SND_SOC_DAPM_OUTPUT("ROUT3"),
- SND_SOC_DAPM_OUTPUT("ROUT4"),
- SND_SOC_DAPM_OUTPUT("ROUT5"),
- SND_SOC_DAPM_OUTPUT("ROUT6"),
- /* Inputs */
- SND_SOC_DAPM_INPUT("LIN1"),
- SND_SOC_DAPM_INPUT("LIN2"),
- SND_SOC_DAPM_INPUT("RIN1"),
- SND_SOC_DAPM_INPUT("RIN2"),
- /* DAC */
- SND_SOC_DAPM_DAC("DAC1", NULL, PW_MGMT3, 0, 0),
- SND_SOC_DAPM_DAC("DAC2", NULL, PW_MGMT3, 1, 0),
- SND_SOC_DAPM_DAC("DAC3", NULL, PW_MGMT3, 2, 0),
- SND_SOC_DAPM_DAC("DAC4", NULL, PW_MGMT3, 3, 0),
- SND_SOC_DAPM_DAC("DAC5", NULL, PW_MGMT3, 4, 0),
- SND_SOC_DAPM_DAC("DAC6", NULL, PW_MGMT3, 5, 0),
- /* ADC */
- SND_SOC_DAPM_ADC("ADC1", NULL, PW_MGMT2, 0, 0),
- SND_SOC_DAPM_ADC("ADC2", NULL, PW_MGMT2, 1, 0),
- };
- static const struct snd_soc_dapm_route ak4613_intercon[] = {
- {"LOUT1", NULL, "DAC1"},
- {"LOUT2", NULL, "DAC2"},
- {"LOUT3", NULL, "DAC3"},
- {"LOUT4", NULL, "DAC4"},
- {"LOUT5", NULL, "DAC5"},
- {"LOUT6", NULL, "DAC6"},
- {"ROUT1", NULL, "DAC1"},
- {"ROUT2", NULL, "DAC2"},
- {"ROUT3", NULL, "DAC3"},
- {"ROUT4", NULL, "DAC4"},
- {"ROUT5", NULL, "DAC5"},
- {"ROUT6", NULL, "DAC6"},
- {"DAC1", NULL, "Playback"},
- {"DAC2", NULL, "Playback"},
- {"DAC3", NULL, "Playback"},
- {"DAC4", NULL, "Playback"},
- {"DAC5", NULL, "Playback"},
- {"DAC6", NULL, "Playback"},
- {"Capture", NULL, "ADC1"},
- {"Capture", NULL, "ADC2"},
- {"ADC1", NULL, "LIN1"},
- {"ADC2", NULL, "LIN2"},
- {"ADC1", NULL, "RIN1"},
- {"ADC2", NULL, "RIN2"},
- };
- static void ak4613_dai_shutdown(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
- {
- struct snd_soc_component *component = dai->component;
- struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
- struct device *dev = component->dev;
- mutex_lock(&priv->lock);
- priv->cnt--;
- if (priv->cnt < 0) {
- dev_err(dev, "unexpected counter error\n");
- priv->cnt = 0;
- }
- if (!priv->cnt)
- priv->iface = NULL;
- mutex_unlock(&priv->lock);
- }
- static void ak4613_hw_constraints(struct ak4613_priv *priv,
- struct snd_pcm_runtime *runtime)
- {
- static const unsigned int ak4613_rates[] = {
- 32000,
- 44100,
- 48000,
- 64000,
- 88200,
- 96000,
- 176400,
- 192000,
- };
- struct snd_pcm_hw_constraint_list *constraint = &priv->constraint;
- unsigned int fs;
- int i;
- constraint->list = ak4613_rates;
- constraint->mask = 0;
- constraint->count = 0;
- /*
- * Slave Mode
- * Normal: [32kHz, 48kHz] : 256fs,384fs or 512fs
- * Double: [64kHz, 96kHz] : 256fs
- * Quad : [128kHz,192kHz]: 128fs
- *
- * Master mode
- * Normal: [32kHz, 48kHz] : 256fs or 512fs
- * Double: [64kHz, 96kHz] : 256fs
- * Quad : [128kHz,192kHz]: 128fs
- */
- for (i = 0; i < ARRAY_SIZE(ak4613_rates); i++) {
- /* minimum fs on each range */
- fs = (ak4613_rates[i] <= 96000) ? 256 : 128;
- if (priv->sysclk >= ak4613_rates[i] * fs)
- constraint->count = i + 1;
- }
- snd_pcm_hw_constraint_list(runtime, 0,
- SNDRV_PCM_HW_PARAM_RATE, constraint);
- }
- static int ak4613_dai_startup(struct snd_pcm_substream *substream,
- struct snd_soc_dai *dai)
- {
- struct snd_soc_component *component = dai->component;
- struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
- priv->cnt++;
- ak4613_hw_constraints(priv, substream->runtime);
- return 0;
- }
- static int ak4613_dai_set_sysclk(struct snd_soc_dai *codec_dai,
- int clk_id, unsigned int freq, int dir)
- {
- struct snd_soc_component *component = codec_dai->component;
- struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
- priv->sysclk = freq;
- return 0;
- }
- static int ak4613_dai_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
- {
- struct snd_soc_component *component = dai->component;
- struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
- fmt &= SND_SOC_DAIFMT_FORMAT_MASK;
- switch (fmt) {
- case SND_SOC_DAIFMT_LEFT_J:
- case SND_SOC_DAIFMT_I2S:
- priv->fmt = fmt;
- break;
- default:
- return -EINVAL;
- }
- return 0;
- }
- static bool ak4613_dai_fmt_matching(const struct ak4613_interface *iface,
- int is_play,
- unsigned int fmt, unsigned int width)
- {
- const struct ak4613_formats *fmts;
- fmts = (is_play) ? &iface->playback : &iface->capture;
- if (fmts->fmt != fmt)
- return false;
- if (fmts->width != width)
- return false;
- return true;
- }
- static int ak4613_dai_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 ak4613_priv *priv = snd_soc_component_get_drvdata(component);
- const struct ak4613_interface *iface;
- struct device *dev = component->dev;
- unsigned int width = params_width(params);
- unsigned int fmt = priv->fmt;
- unsigned int rate;
- int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
- int i, ret;
- u8 fmt_ctrl, ctrl2;
- rate = params_rate(params);
- switch (rate) {
- case 32000:
- case 44100:
- case 48000:
- ctrl2 = DFS_NORMAL_SPEED;
- break;
- case 64000:
- case 88200:
- case 96000:
- ctrl2 = DFS_DOUBLE_SPEED;
- break;
- case 176400:
- case 192000:
- ctrl2 = DFS_QUAD_SPEED;
- break;
- default:
- return -EINVAL;
- }
- priv->rate = rate;
- /*
- * FIXME
- *
- * It doesn't support TDM at this point
- */
- fmt_ctrl = NO_FMT;
- ret = -EINVAL;
- iface = NULL;
- mutex_lock(&priv->lock);
- if (priv->iface) {
- if (ak4613_dai_fmt_matching(priv->iface, is_play, fmt, width))
- iface = priv->iface;
- } else {
- for (i = ARRAY_SIZE(ak4613_iface) - 1; i >= 0; i--) {
- if (!ak4613_dai_fmt_matching(ak4613_iface + i,
- is_play,
- fmt, width))
- continue;
- iface = ak4613_iface + i;
- break;
- }
- }
- if ((priv->iface == NULL) ||
- (priv->iface == iface)) {
- priv->iface = iface;
- ret = 0;
- }
- mutex_unlock(&priv->lock);
- if (ret < 0)
- goto hw_params_end;
- fmt_ctrl = AUDIO_IFACE_TO_VAL(iface);
- snd_soc_component_update_bits(component, CTRL1, FMT_MASK, fmt_ctrl);
- snd_soc_component_update_bits(component, CTRL2, DFS_MASK, ctrl2);
- snd_soc_component_update_bits(component, ICTRL, ICTRL_MASK, priv->ic);
- snd_soc_component_update_bits(component, OCTRL, OCTRL_MASK, priv->oc);
- hw_params_end:
- if (ret < 0)
- dev_warn(dev, "unsupported data width/format combination\n");
- return ret;
- }
- static int ak4613_set_bias_level(struct snd_soc_component *component,
- enum snd_soc_bias_level level)
- {
- u8 mgmt1 = 0;
- switch (level) {
- case SND_SOC_BIAS_ON:
- mgmt1 |= RSTN;
- fallthrough;
- case SND_SOC_BIAS_PREPARE:
- mgmt1 |= PMADC | PMDAC;
- fallthrough;
- case SND_SOC_BIAS_STANDBY:
- mgmt1 |= PMVR;
- fallthrough;
- case SND_SOC_BIAS_OFF:
- default:
- break;
- }
- snd_soc_component_write(component, PW_MGMT1, mgmt1);
- return 0;
- }
- static void ak4613_dummy_write(struct work_struct *work)
- {
- struct ak4613_priv *priv = container_of(work,
- struct ak4613_priv,
- dummy_write_work);
- struct snd_soc_component *component = priv->component;
- unsigned int mgmt1;
- unsigned int mgmt3;
- /*
- * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
- *
- * Note
- *
- * To avoid extra delay, we want to avoid preemption here,
- * but we can't. Because it uses I2C access which is using IRQ
- * and sleep. Thus, delay might be more than 5 LR clocks
- * see also
- * ak4613_dai_trigger()
- */
- udelay(5000000 / priv->rate);
- mgmt1 = snd_soc_component_read(component, PW_MGMT1);
- mgmt3 = snd_soc_component_read(component, PW_MGMT3);
- snd_soc_component_write(component, PW_MGMT1, mgmt1);
- snd_soc_component_write(component, PW_MGMT3, mgmt3);
- }
- static int ak4613_dai_trigger(struct snd_pcm_substream *substream, int cmd,
- struct snd_soc_dai *dai)
- {
- struct snd_soc_component *component = dai->component;
- struct ak4613_priv *priv = snd_soc_component_get_drvdata(component);
- /*
- * FIXME
- *
- * PW_MGMT1 / PW_MGMT3 needs dummy write at least after 5 LR clocks
- * from Power Down Release. Otherwise, Playback volume will be 0dB.
- * To avoid complex multiple delay/dummy_write method from
- * ak4613_set_bias_level() / SND_SOC_DAPM_DAC_E("DACx", ...),
- * call it once here.
- *
- * But, unfortunately, we can't "write" here because here is atomic
- * context (It uses I2C access for writing).
- * Thus, use schedule_work() to switching to normal context
- * immediately.
- *
- * Note
- *
- * Calling ak4613_dummy_write() function might be delayed.
- * In such case, ak4613 volume might be temporarily 0dB when
- * beggining of playback.
- * see also
- * ak4613_dummy_write()
- */
- if ((cmd != SNDRV_PCM_TRIGGER_START) &&
- (cmd != SNDRV_PCM_TRIGGER_RESUME))
- return 0;
- if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
- return 0;
- priv->component = component;
- schedule_work(&priv->dummy_write_work);
- return 0;
- }
- static const struct snd_soc_dai_ops ak4613_dai_ops = {
- .startup = ak4613_dai_startup,
- .shutdown = ak4613_dai_shutdown,
- .set_sysclk = ak4613_dai_set_sysclk,
- .set_fmt = ak4613_dai_set_fmt,
- .trigger = ak4613_dai_trigger,
- .hw_params = ak4613_dai_hw_params,
- };
- #define AK4613_PCM_RATE (SNDRV_PCM_RATE_32000 |\
- SNDRV_PCM_RATE_44100 |\
- SNDRV_PCM_RATE_48000 |\
- SNDRV_PCM_RATE_64000 |\
- SNDRV_PCM_RATE_88200 |\
- SNDRV_PCM_RATE_96000 |\
- SNDRV_PCM_RATE_176400 |\
- SNDRV_PCM_RATE_192000)
- #define AK4613_PCM_FMTBIT (SNDRV_PCM_FMTBIT_S24_LE)
- static struct snd_soc_dai_driver ak4613_dai = {
- .name = "ak4613-hifi",
- .playback = {
- .stream_name = "Playback",
- .channels_min = 2,
- .channels_max = 2,
- .rates = AK4613_PCM_RATE,
- .formats = AK4613_PCM_FMTBIT,
- },
- .capture = {
- .stream_name = "Capture",
- .channels_min = 2,
- .channels_max = 2,
- .rates = AK4613_PCM_RATE,
- .formats = AK4613_PCM_FMTBIT,
- },
- .ops = &ak4613_dai_ops,
- .symmetric_rates = 1,
- };
- static int ak4613_suspend(struct snd_soc_component *component)
- {
- struct regmap *regmap = dev_get_regmap(component->dev, NULL);
- regcache_cache_only(regmap, true);
- regcache_mark_dirty(regmap);
- return 0;
- }
- static int ak4613_resume(struct snd_soc_component *component)
- {
- struct regmap *regmap = dev_get_regmap(component->dev, NULL);
- regcache_cache_only(regmap, false);
- return regcache_sync(regmap);
- }
- static const struct snd_soc_component_driver soc_component_dev_ak4613 = {
- .suspend = ak4613_suspend,
- .resume = ak4613_resume,
- .set_bias_level = ak4613_set_bias_level,
- .controls = ak4613_snd_controls,
- .num_controls = ARRAY_SIZE(ak4613_snd_controls),
- .dapm_widgets = ak4613_dapm_widgets,
- .num_dapm_widgets = ARRAY_SIZE(ak4613_dapm_widgets),
- .dapm_routes = ak4613_intercon,
- .num_dapm_routes = ARRAY_SIZE(ak4613_intercon),
- .idle_bias_on = 1,
- .endianness = 1,
- .non_legacy_dai_naming = 1,
- };
- static void ak4613_parse_of(struct ak4613_priv *priv,
- struct device *dev)
- {
- struct device_node *np = dev->of_node;
- char prop[32];
- int i;
- /* Input 1 - 2 */
- for (i = 0; i < 2; i++) {
- snprintf(prop, sizeof(prop), "asahi-kasei,in%d-single-end", i + 1);
- if (!of_get_property(np, prop, NULL))
- priv->ic |= 1 << i;
- }
- /* Output 1 - 6 */
- for (i = 0; i < 6; i++) {
- snprintf(prop, sizeof(prop), "asahi-kasei,out%d-single-end", i + 1);
- if (!of_get_property(np, prop, NULL))
- priv->oc |= 1 << i;
- }
- }
- static int ak4613_i2c_probe(struct i2c_client *i2c,
- const struct i2c_device_id *id)
- {
- struct device *dev = &i2c->dev;
- struct device_node *np = dev->of_node;
- const struct regmap_config *regmap_cfg;
- struct regmap *regmap;
- struct ak4613_priv *priv;
- regmap_cfg = NULL;
- if (np) {
- const struct of_device_id *of_id;
- of_id = of_match_device(ak4613_of_match, dev);
- if (of_id)
- regmap_cfg = of_id->data;
- } else {
- regmap_cfg = (const struct regmap_config *)id->driver_data;
- }
- if (!regmap_cfg)
- return -EINVAL;
- priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
- ak4613_parse_of(priv, dev);
- priv->iface = NULL;
- priv->cnt = 0;
- priv->sysclk = 0;
- INIT_WORK(&priv->dummy_write_work, ak4613_dummy_write);
- mutex_init(&priv->lock);
- i2c_set_clientdata(i2c, priv);
- regmap = devm_regmap_init_i2c(i2c, regmap_cfg);
- if (IS_ERR(regmap))
- return PTR_ERR(regmap);
- return devm_snd_soc_register_component(dev, &soc_component_dev_ak4613,
- &ak4613_dai, 1);
- }
- static int ak4613_i2c_remove(struct i2c_client *client)
- {
- return 0;
- }
- static struct i2c_driver ak4613_i2c_driver = {
- .driver = {
- .name = "ak4613-codec",
- .of_match_table = ak4613_of_match,
- },
- .probe = ak4613_i2c_probe,
- .remove = ak4613_i2c_remove,
- .id_table = ak4613_i2c_id,
- };
- module_i2c_driver(ak4613_i2c_driver);
- MODULE_DESCRIPTION("Soc AK4613 driver");
- MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
- MODULE_LICENSE("GPL v2");
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