sound/soc/codecs/tas2780.c - linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 // Driver for the Texas Instruments TAS2780 Mono
 //		Audio amplifier
 // Copyright (C) 2022 Texas Instruments Inc.

 #include <linux/module.h>
 #include <linux/err.h>
 #include <linux/pm.h>
 #include <linux/i2c.h>
 #include <linux/gpio.h>
 #include <linux/gpio/consumer.h>
 #include <linux/regmap.h>
 #include <linux/of.h>
 #include <sound/soc.h>
 #include <sound/pcm.h>
 #include <sound/pcm_params.h>
 #include <sound/tlv.h>

 #include "tas2780.h"

 struct tas2780_priv {
 	struct snd_soc_component *component;
 	struct gpio_desc *reset_gpio;
 	struct regmap *regmap;
 	struct device *dev;
 	int v_sense_slot;
 	int i_sense_slot;
 };

 static void tas2780_reset(struct tas2780_priv *tas2780)
 {
 	int ret = 0;

 	if (tas2780->reset_gpio) {
 		gpiod_set_value_cansleep(tas2780->reset_gpio, 0);
 		usleep_range(2000, 2050);
 		gpiod_set_value_cansleep(tas2780->reset_gpio, 1);
 		usleep_range(2000, 2050);
 	}

 	ret = snd_soc_component_write(tas2780->component, TAS2780_SW_RST,
 				TAS2780_RST);
 	if (ret)
 		dev_err(tas2780->dev, "%s:errCode:0x%x Reset error!\n",
 			__func__, ret);
 }

 #ifdef CONFIG_PM
 static int tas2780_codec_suspend(struct snd_soc_component *component)
 {
 	struct tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	int ret = 0;

 	ret = snd_soc_component_update_bits(component, TAS2780_PWR_CTRL,
 		TAS2780_PWR_CTRL_MASK, TAS2780_PWR_CTRL_SHUTDOWN);
 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%0x:power down error\n",
 			__func__, ret);
 		goto err;
 	}
 	ret = 0;
 	regcache_cache_only(tas2780->regmap, true);
 	regcache_mark_dirty(tas2780->regmap);
 err:
 	return ret;
 }

 static int tas2780_codec_resume(struct snd_soc_component *component)
 {
 	struct tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	int ret;

 	ret = snd_soc_component_update_bits(component, TAS2780_PWR_CTRL,
 		TAS2780_PWR_CTRL_MASK, TAS2780_PWR_CTRL_ACTIVE);

 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%0x:power down error\n",
 			__func__, ret);
 		goto err;
 	}
 	regcache_cache_only(tas2780->regmap, false);
 	ret = regcache_sync(tas2780->regmap);
 err:
 	return ret;
 }
 #endif

 static const char * const tas2780_ASI1_src[] = {
 	"I2C offset", "Left", "Right", "LeftRightDiv2",
 };

 static SOC_ENUM_SINGLE_DECL(
 	tas2780_ASI1_src_enum, TAS2780_TDM_CFG2, 4, tas2780_ASI1_src);

 static const struct snd_kcontrol_new tas2780_asi1_mux =
 	SOC_DAPM_ENUM("ASI1 Source", tas2780_ASI1_src_enum);

 static const struct snd_kcontrol_new isense_switch =
 	SOC_DAPM_SINGLE("Switch", TAS2780_PWR_CTRL,
 			TAS2780_ISENSE_POWER_EN, 1, 1);
 static const struct snd_kcontrol_new vsense_switch =
 	SOC_DAPM_SINGLE("Switch", TAS2780_PWR_CTRL,
 			TAS2780_VSENSE_POWER_EN, 1, 1);

 static const struct snd_soc_dapm_widget tas2780_dapm_widgets[] = {
 	SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
 	SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2780_asi1_mux),
 	SND_SOC_DAPM_SWITCH("ISENSE", TAS2780_PWR_CTRL,
 		TAS2780_ISENSE_POWER_EN, 1, &isense_switch),
 	SND_SOC_DAPM_SWITCH("VSENSE", TAS2780_PWR_CTRL,
 		TAS2780_VSENSE_POWER_EN, 1, &vsense_switch),
 	SND_SOC_DAPM_OUTPUT("OUT"),
 	SND_SOC_DAPM_SIGGEN("VMON"),
 	SND_SOC_DAPM_SIGGEN("IMON")
 };

 static const struct snd_soc_dapm_route tas2780_audio_map[] = {
 	{"ASI1 Sel", "I2C offset", "ASI1"},
 	{"ASI1 Sel", "Left", "ASI1"},
 	{"ASI1 Sel", "Right", "ASI1"},
 	{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
 	{"OUT", NULL, "ASI1 Sel"},
 	{"ISENSE", "Switch", "IMON"},
 	{"VSENSE", "Switch", "VMON"},
 };

 static int tas2780_mute(struct snd_soc_dai *dai, int mute, int direction)
 {
 	struct snd_soc_component *component = dai->component;
 	struct tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	int ret = 0;

 	ret = snd_soc_component_update_bits(component, TAS2780_PWR_CTRL,
 		TAS2780_PWR_CTRL_MASK,
 		mute ? TAS2780_PWR_CTRL_MUTE : 0);
 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s: Failed to set powercontrol\n",
 			__func__);
 		goto err;
 	}
 	ret = 0;
 err:
 	return ret;
 }

 static int tas2780_set_bitwidth(struct tas2780_priv *tas2780, int bitwidth)
 {
 	struct snd_soc_component *component = tas2780->component;
 	int sense_en;
 	int val;
 	int ret;
 	int slot_size;

 	switch (bitwidth) {
 	case SNDRV_PCM_FORMAT_S16_LE:
 		ret = snd_soc_component_update_bits(component,
 			TAS2780_TDM_CFG2,
 			TAS2780_TDM_CFG2_RXW_MASK,
 			TAS2780_TDM_CFG2_RXW_16BITS);
 		slot_size = TAS2780_TDM_CFG2_RXS_16BITS;
 		break;
 	case SNDRV_PCM_FORMAT_S24_LE:
 		ret = snd_soc_component_update_bits(component,
 			TAS2780_TDM_CFG2,
 			TAS2780_TDM_CFG2_RXW_MASK,
 			TAS2780_TDM_CFG2_RXW_24BITS);
 		slot_size = TAS2780_TDM_CFG2_RXS_24BITS;
 		break;
 	case SNDRV_PCM_FORMAT_S32_LE:
 		ret = snd_soc_component_update_bits(component,
 			TAS2780_TDM_CFG2,
 			TAS2780_TDM_CFG2_RXW_MASK,
 			TAS2780_TDM_CFG2_RXW_32BITS);
 		slot_size = TAS2780_TDM_CFG2_RXS_32BITS;
 		break;

 	default:
 		ret = -EINVAL;
 	}

 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%x set bitwidth error\n",
 			__func__, ret);
 		goto err;
 	}

 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG2,
 		TAS2780_TDM_CFG2_RXS_MASK, slot_size);
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x set RX slot size error\n",
 			__func__, ret);
 		goto err;
 	}

 	val = snd_soc_component_read(tas2780->component, TAS2780_PWR_CTRL);
 	if (val < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%x read PWR_CTRL error\n",
 			__func__, val);
 		ret = val;
 		goto err;
 	}

 	if (val & (1 << TAS2780_VSENSE_POWER_EN))
 		sense_en = 0;
 	else
 		sense_en = TAS2780_TDM_CFG5_VSNS_ENABLE;

 	ret = snd_soc_component_update_bits(tas2780->component,
 		TAS2780_TDM_CFG5, TAS2780_TDM_CFG5_VSNS_ENABLE, sense_en);
 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%x enable vSNS error\n",
 			__func__, ret);
 		goto err;
 	}

 	if (val & (1 << TAS2780_ISENSE_POWER_EN))
 		sense_en = 0;
 	else
 		sense_en = TAS2780_TDM_CFG6_ISNS_ENABLE;

 	ret = snd_soc_component_update_bits(tas2780->component,
 		TAS2780_TDM_CFG6, TAS2780_TDM_CFG6_ISNS_ENABLE, sense_en);
 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%x enable iSNS error\n",
 			__func__, ret);
 		goto err;
 	}
 	ret = 0;
 err:
 	return ret;
 }

 static int tas2780_set_samplerate(
 	struct tas2780_priv *tas2780, int samplerate)
 {
 	struct snd_soc_component *component = tas2780->component;
 	int ramp_rate_val;
 	int ret;

 	switch (samplerate) {
 	case 48000:
 		ramp_rate_val = TAS2780_TDM_CFG0_SMP_48KHZ |
 				TAS2780_TDM_CFG0_44_1_48KHZ;
 		break;
 	case 44100:
 		ramp_rate_val = TAS2780_TDM_CFG0_SMP_44_1KHZ |
 				TAS2780_TDM_CFG0_44_1_48KHZ;
 		break;
 	case 96000:
 		ramp_rate_val = TAS2780_TDM_CFG0_SMP_48KHZ |
 				TAS2780_TDM_CFG0_88_2_96KHZ;
 		break;
 	case 88200:
 		ramp_rate_val = TAS2780_TDM_CFG0_SMP_44_1KHZ |
 				TAS2780_TDM_CFG0_88_2_96KHZ;
 		break;
 	default:
 		return -EINVAL;
 	}
 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG0,
 		TAS2780_TDM_CFG0_SMP_MASK | TAS2780_TDM_CFG0_MASK,
 		ramp_rate_val);
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set ramp_rate_val\n",
 			__func__, ret);
 		goto err;
 	}
 	ret = 0;
 err:
 	return ret;
 }

 static int tas2780_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 tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	int ret;

 	ret = tas2780_set_bitwidth(tas2780, params_format(params));
 	if (ret < 0)
 		return ret;

 	return tas2780_set_samplerate(tas2780, params_rate(params));
 }

 static int tas2780_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
 {
 	struct snd_soc_component *component = dai->component;
 	struct tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
 	int iface;
 	int ret = 0;

 	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 	case SND_SOC_DAIFMT_NB_NF:
 		asi_cfg_1 = TAS2780_TDM_CFG1_RX_RISING;
 		break;
 	case SND_SOC_DAIFMT_IB_NF:
 		asi_cfg_1 = TAS2780_TDM_CFG1_RX_FALLING;
 		break;
 	default:
 		dev_err(tas2780->dev, "ASI format Inverse is not found\n");
 		return -EINVAL;
 	}

 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG1,
 		TAS2780_TDM_CFG1_RX_MASK, asi_cfg_1);
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set asi_cfg_1\n",
 			__func__, ret);
 		goto err;
 	}

 	if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S)
 		|| ((fmt & SND_SOC_DAIFMT_FORMAT_MASK)
 		== SND_SOC_DAIFMT_DSP_A)){
 		iface = TAS2780_TDM_CFG2_SCFG_I2S;
 		tdm_rx_start_slot = 1;
 	} else {
 		if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK)
 			== SND_SOC_DAIFMT_DSP_B)
 			|| ((fmt & SND_SOC_DAIFMT_FORMAT_MASK)
 			== SND_SOC_DAIFMT_LEFT_J)) {
 			iface = TAS2780_TDM_CFG2_SCFG_LEFT_J;
 			tdm_rx_start_slot = 0;
 		} else {
 			dev_err(tas2780->dev,
 				"%s:DAI Format is not found, fmt=0x%x\n",
 				__func__, fmt);
 			ret = -EINVAL;
 			goto err;
 		}
 	}
 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG1,
 		TAS2780_TDM_CFG1_MASK,
 		(tdm_rx_start_slot << TAS2780_TDM_CFG1_51_SHIFT));
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set tdm_rx_start_slot\n",
 			__func__, ret);
 		goto err;
 	}

 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG2,
 		TAS2780_TDM_CFG2_SCFG_MASK, iface);
 	if (ret < 0) {
 		dev_err(tas2780->dev, "%s:errCode:0x%x Failed to set iface\n",
 			__func__, ret);
 		goto err;
 	}
 	ret = 0;
 err:
 	return ret;
 }

 static int tas2780_set_dai_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 tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	int left_slot, right_slot;
 	int slots_cfg;
 	int slot_size;
 	int ret = 0;

 	if (tx_mask == 0 || rx_mask != 0)
 		return -EINVAL;

 	left_slot = __ffs(tx_mask);
 	tx_mask &= ~(1 << left_slot);
 	if (tx_mask == 0) {
 		right_slot = left_slot;
 	} else {
 		right_slot = __ffs(tx_mask);
 		tx_mask &= ~(1 << right_slot);
 	}

 	if (tx_mask != 0 || left_slot >= slots || right_slot >= slots)
 		return -EINVAL;

 	slots_cfg = (right_slot << TAS2780_TDM_CFG3_RXS_SHIFT) | left_slot;
 	ret = snd_soc_component_write(component, TAS2780_TDM_CFG3, slots_cfg);
 	if (ret) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set slots_cfg\n",
 			__func__, ret);
 		goto err;
 	}

 	switch (slot_width) {
 	case 16:
 		slot_size = TAS2780_TDM_CFG2_RXS_16BITS;
 		break;
 	case 24:
 		slot_size = TAS2780_TDM_CFG2_RXS_24BITS;
 		break;
 	case 32:
 		slot_size = TAS2780_TDM_CFG2_RXS_32BITS;
 		break;
 	default:
 		ret = -EINVAL;
 		goto err;
 	}

 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG2,
 		TAS2780_TDM_CFG2_RXS_MASK, slot_size);
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set slot_size\n",
 			__func__, ret);
 		goto err;
 	}

 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG5,
 		TAS2780_TDM_CFG5_50_MASK, tas2780->v_sense_slot);
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set v_sense_slot\n",
 			__func__, ret);
 		goto err;
 	}

 	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG6,
 		TAS2780_TDM_CFG6_50_MASK, tas2780->i_sense_slot);
 	if (ret < 0) {
 		dev_err(tas2780->dev,
 			"%s:errCode:0x%x Failed to set i_sense_slot\n",
 			__func__, ret);
 		goto err;
 	}
 	ret = 0;
 err:
 	return ret;
 }

 static const struct snd_soc_dai_ops tas2780_dai_ops = {
 	.mute_stream = tas2780_mute,
 	.hw_params  = tas2780_hw_params,
 	.set_fmt    = tas2780_set_fmt,
 	.set_tdm_slot = tas2780_set_dai_tdm_slot,
 	.no_capture_mute = 1,
 };

 #define TAS2780_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
 			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)

 #define TAS2780_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
 		       SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_88200)

 static struct snd_soc_dai_driver tas2780_dai_driver[] = {
 	{
 		.name = "tas2780 ASI1",
 		.id = 0,
 		.playback = {
 			.stream_name    = "ASI1 Playback",
 			.channels_min   = 2,
 			.channels_max   = 2,
 			.rates      = TAS2780_RATES,
 			.formats    = TAS2780_FORMATS,
 		},
 		.capture = {
 			.stream_name    = "ASI1 Capture",
 			.channels_min   = 1,
 			.channels_max   = 2,
 			.rates = TAS2780_RATES,
 			.formats = TAS2780_FORMATS,
 		},
 		.ops = &tas2780_dai_ops,
 		.symmetric_rate = 1,
 	},
 };

 static int tas2780_codec_probe(struct snd_soc_component *component)
 {
 	struct tas2780_priv *tas2780 =
 		snd_soc_component_get_drvdata(component);
 	int ret = 0;

 	tas2780->component = component;

 	tas2780_reset(tas2780);
 	ret = snd_soc_component_update_bits(component,
 			TAS2780_IC_CFG, TAS2780_IC_CFG_MASK,
 			TAS2780_IC_CFG_ENABLE);
 	if (ret < 0)
 		dev_err(tas2780->dev, "%s:errCode:0x%0x\n",
 			__func__, ret);

 	return ret;
 }

 static DECLARE_TLV_DB_SCALE(tas2780_digital_tlv, 1100, 50, 0);
 static DECLARE_TLV_DB_SCALE(tas2780_playback_volume, -10000, 50, 0);

 static const struct snd_kcontrol_new tas2780_snd_controls[] = {
 	SOC_SINGLE_TLV("Speaker Volume", TAS2780_DVC, 0,
 		       TAS2780_DVC_MAX, 1, tas2780_playback_volume),
 	SOC_SINGLE_TLV("Amp Gain Volume", TAS2780_CHNL_0, 0, 0x14, 0,
 		       tas2780_digital_tlv),
 };

 static const struct snd_soc_component_driver soc_component_driver_tas2780 = {
 	.probe			= tas2780_codec_probe,
 #ifdef CONFIG_PM
 	.suspend		= tas2780_codec_suspend,
 	.resume			= tas2780_codec_resume,
 #endif
 	.controls		= tas2780_snd_controls,
 	.num_controls		= ARRAY_SIZE(tas2780_snd_controls),
 	.dapm_widgets		= tas2780_dapm_widgets,
 	.num_dapm_widgets	= ARRAY_SIZE(tas2780_dapm_widgets),
 	.dapm_routes		= tas2780_audio_map,
 	.num_dapm_routes	= ARRAY_SIZE(tas2780_audio_map),
 	.idle_bias_on		= 1,
 	.endianness		= 1,
 };

 static const struct reg_default tas2780_reg_defaults[] = {
 	{ TAS2780_PAGE, 0x00 },
 	{ TAS2780_SW_RST, 0x00 },
 	{ TAS2780_PWR_CTRL, 0x1a },
 	{ TAS2780_DVC, 0x00 },
 	{ TAS2780_CHNL_0, 0x00 },
 	{ TAS2780_TDM_CFG0, 0x09 },
 	{ TAS2780_TDM_CFG1, 0x02 },
 	{ TAS2780_TDM_CFG2, 0x0a },
 	{ TAS2780_TDM_CFG3, 0x10 },
 	{ TAS2780_TDM_CFG5, 0x42 },
 };

 static const struct regmap_range_cfg tas2780_regmap_ranges[] = {
 	{
 		.range_min = 0,
 		.range_max = 1 * 128,
 		.selector_reg = TAS2780_PAGE,
 		.selector_mask = 0xff,
 		.selector_shift = 0,
 		.window_start = 0,
 		.window_len = 128,
 	},
 };

 static const struct regmap_config tas2780_i2c_regmap = {
 	.reg_bits = 8,
 	.val_bits = 8,
 	.reg_defaults = tas2780_reg_defaults,
 	.num_reg_defaults = ARRAY_SIZE(tas2780_reg_defaults),
 	.cache_type = REGCACHE_RBTREE,
 	.ranges = tas2780_regmap_ranges,
 	.num_ranges = ARRAY_SIZE(tas2780_regmap_ranges),
 	.max_register = 1 * 128,
 };

 static int tas2780_parse_dt(struct device *dev, struct tas2780_priv *tas2780)
 {
 	int ret = 0;

 	tas2780->reset_gpio = devm_gpiod_get_optional(tas2780->dev, "reset",
 		GPIOD_OUT_HIGH);
 	if (IS_ERR(tas2780->reset_gpio)) {
 		if (PTR_ERR(tas2780->reset_gpio) == -EPROBE_DEFER) {
 			tas2780->reset_gpio = NULL;
 			return -EPROBE_DEFER;
 		}
 	}

 	ret = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
 		&tas2780->i_sense_slot);
 	if (ret)
 		tas2780->i_sense_slot = 0;

 	ret = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
 		&tas2780->v_sense_slot);
 	if (ret)
 		tas2780->v_sense_slot = 2;

 	return 0;
 }

 static int tas2780_i2c_probe(struct i2c_client *client)
 {
 	struct tas2780_priv *tas2780;
 	int result;

 	tas2780 = devm_kzalloc(&client->dev, sizeof(struct tas2780_priv),
 		GFP_KERNEL);
 	if (!tas2780)
 		return -ENOMEM;
 	tas2780->dev = &client->dev;
 	i2c_set_clientdata(client, tas2780);
 	dev_set_drvdata(&client->dev, tas2780);

 	tas2780->regmap = devm_regmap_init_i2c(client, &tas2780_i2c_regmap);
 	if (IS_ERR(tas2780->regmap)) {
 		result = PTR_ERR(tas2780->regmap);
 		dev_err(&client->dev, "Failed to allocate register map: %d\n",
 			result);
 		return result;
 	}

 	if (client->dev.of_node) {
 		result = tas2780_parse_dt(&client->dev, tas2780);
 		if (result) {
 			dev_err(tas2780->dev,
 				"%s: Failed to parse devicetree\n", __func__);
 			return result;
 		}
 	}

 	return devm_snd_soc_register_component(tas2780->dev,
 		&soc_component_driver_tas2780, tas2780_dai_driver,
 		ARRAY_SIZE(tas2780_dai_driver));
 }

 static const struct i2c_device_id tas2780_i2c_id[] = {
 	{ "tas2780"},
 	{ }
 };
 MODULE_DEVICE_TABLE(i2c, tas2780_i2c_id);

 #if defined(CONFIG_OF)
 static const struct of_device_id tas2780_of_match[] = {
 	{ .compatible = "ti,tas2780" },
 	{},
 };
 MODULE_DEVICE_TABLE(of, tas2780_of_match);
 #endif

 static struct i2c_driver tas2780_i2c_driver = {
 	.driver = {
 		.name   = "tas2780",
 		.of_match_table = of_match_ptr(tas2780_of_match),
 	},
 	.probe      = tas2780_i2c_probe,
 	.id_table   = tas2780_i2c_id,
 };
 module_i2c_driver(tas2780_i2c_driver);

 MODULE_AUTHOR("Raphael Xu <raphael-xu@ti.com>");
 MODULE_DESCRIPTION("TAS2780 I2C Smart Amplifier driver");
 MODULE_LICENSE("GPL");
	// SPDX-License-Identifier: GPL-2.0
	// Driver for the Texas Instruments TAS2780 Mono
	// Audio amplifier
	// Copyright (C) 2022 Texas Instruments Inc.

	#include <linux/module.h>
	#include <linux/err.h>
	#include <linux/pm.h>
	#include <linux/i2c.h>
	#include <linux/gpio.h>
	#include <linux/gpio/consumer.h>
	#include <linux/regmap.h>
	#include <linux/of.h>
	#include <sound/soc.h>
	#include <sound/pcm.h>
	#include <sound/pcm_params.h>
	#include <sound/tlv.h>

	#include "tas2780.h"

	struct tas2780_priv {
	struct snd_soc_component *component;
	struct gpio_desc *reset_gpio;
	struct regmap *regmap;
	struct device *dev;
	int v_sense_slot;
	int i_sense_slot;
	};

	static void tas2780_reset(struct tas2780_priv *tas2780)
	{
	int ret = 0;

	if (tas2780->reset_gpio) {
	gpiod_set_value_cansleep(tas2780->reset_gpio, 0);
	usleep_range(2000, 2050);
	gpiod_set_value_cansleep(tas2780->reset_gpio, 1);
	usleep_range(2000, 2050);
	}

	ret = snd_soc_component_write(tas2780->component, TAS2780_SW_RST,
	TAS2780_RST);
	if (ret)
	dev_err(tas2780->dev, "%s:errCode:0x%x Reset error!\n",
	__func__, ret);
	}

	#ifdef CONFIG_PM
	static int tas2780_codec_suspend(struct snd_soc_component *component)
	{
	struct tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	int ret = 0;

	ret = snd_soc_component_update_bits(component, TAS2780_PWR_CTRL,
	TAS2780_PWR_CTRL_MASK, TAS2780_PWR_CTRL_SHUTDOWN);
	if (ret < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%0x:power down error\n",
	__func__, ret);
	goto err;
	}
	ret = 0;
	regcache_cache_only(tas2780->regmap, true);
	regcache_mark_dirty(tas2780->regmap);
	err:
	return ret;
	}

	static int tas2780_codec_resume(struct snd_soc_component *component)
	{
	struct tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	int ret;

	ret = snd_soc_component_update_bits(component, TAS2780_PWR_CTRL,
	TAS2780_PWR_CTRL_MASK, TAS2780_PWR_CTRL_ACTIVE);

	if (ret < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%0x:power down error\n",
	__func__, ret);
	goto err;
	}
	regcache_cache_only(tas2780->regmap, false);
	ret = regcache_sync(tas2780->regmap);
	err:
	return ret;
	}
	#endif

	static const char * const tas2780_ASI1_src[] = {
	"I2C offset", "Left", "Right", "LeftRightDiv2",
	};

	static SOC_ENUM_SINGLE_DECL(
	tas2780_ASI1_src_enum, TAS2780_TDM_CFG2, 4, tas2780_ASI1_src);

	static const struct snd_kcontrol_new tas2780_asi1_mux =
	SOC_DAPM_ENUM("ASI1 Source", tas2780_ASI1_src_enum);

	static const struct snd_kcontrol_new isense_switch =
	SOC_DAPM_SINGLE("Switch", TAS2780_PWR_CTRL,
	TAS2780_ISENSE_POWER_EN, 1, 1);
	static const struct snd_kcontrol_new vsense_switch =
	SOC_DAPM_SINGLE("Switch", TAS2780_PWR_CTRL,
	TAS2780_VSENSE_POWER_EN, 1, 1);

	static const struct snd_soc_dapm_widget tas2780_dapm_widgets[] = {
	SND_SOC_DAPM_AIF_IN("ASI1", "ASI1 Playback", 0, SND_SOC_NOPM, 0, 0),
	SND_SOC_DAPM_MUX("ASI1 Sel", SND_SOC_NOPM, 0, 0, &tas2780_asi1_mux),
	SND_SOC_DAPM_SWITCH("ISENSE", TAS2780_PWR_CTRL,
	TAS2780_ISENSE_POWER_EN, 1, &isense_switch),
	SND_SOC_DAPM_SWITCH("VSENSE", TAS2780_PWR_CTRL,
	TAS2780_VSENSE_POWER_EN, 1, &vsense_switch),
	SND_SOC_DAPM_OUTPUT("OUT"),
	SND_SOC_DAPM_SIGGEN("VMON"),
	SND_SOC_DAPM_SIGGEN("IMON")
	};

	static const struct snd_soc_dapm_route tas2780_audio_map[] = {
	{"ASI1 Sel", "I2C offset", "ASI1"},
	{"ASI1 Sel", "Left", "ASI1"},
	{"ASI1 Sel", "Right", "ASI1"},
	{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
	{"OUT", NULL, "ASI1 Sel"},
	{"ISENSE", "Switch", "IMON"},
	{"VSENSE", "Switch", "VMON"},
	};

	static int tas2780_mute(struct snd_soc_dai *dai, int mute, int direction)
	{
	struct snd_soc_component *component = dai->component;
	struct tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	int ret = 0;

	ret = snd_soc_component_update_bits(component, TAS2780_PWR_CTRL,
	TAS2780_PWR_CTRL_MASK,
	mute ? TAS2780_PWR_CTRL_MUTE : 0);
	if (ret < 0) {
	dev_err(tas2780->dev, "%s: Failed to set powercontrol\n",
	__func__);
	goto err;
	}
	ret = 0;
	err:
	return ret;
	}

	static int tas2780_set_bitwidth(struct tas2780_priv *tas2780, int bitwidth)
	{
	struct snd_soc_component *component = tas2780->component;
	int sense_en;
	int val;
	int ret;
	int slot_size;

	switch (bitwidth) {
	case SNDRV_PCM_FORMAT_S16_LE:
	ret = snd_soc_component_update_bits(component,
	TAS2780_TDM_CFG2,
	TAS2780_TDM_CFG2_RXW_MASK,
	TAS2780_TDM_CFG2_RXW_16BITS);
	slot_size = TAS2780_TDM_CFG2_RXS_16BITS;
	break;
	case SNDRV_PCM_FORMAT_S24_LE:
	ret = snd_soc_component_update_bits(component,
	TAS2780_TDM_CFG2,
	TAS2780_TDM_CFG2_RXW_MASK,
	TAS2780_TDM_CFG2_RXW_24BITS);
	slot_size = TAS2780_TDM_CFG2_RXS_24BITS;
	break;
	case SNDRV_PCM_FORMAT_S32_LE:
	ret = snd_soc_component_update_bits(component,
	TAS2780_TDM_CFG2,
	TAS2780_TDM_CFG2_RXW_MASK,
	TAS2780_TDM_CFG2_RXW_32BITS);
	slot_size = TAS2780_TDM_CFG2_RXS_32BITS;
	break;

	default:
	ret = -EINVAL;
	}

	if (ret < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%x set bitwidth error\n",
	__func__, ret);
	goto err;
	}

	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG2,
	TAS2780_TDM_CFG2_RXS_MASK, slot_size);
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x set RX slot size error\n",
	__func__, ret);
	goto err;
	}

	val = snd_soc_component_read(tas2780->component, TAS2780_PWR_CTRL);
	if (val < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%x read PWR_CTRL error\n",
	__func__, val);
	ret = val;
	goto err;
	}

	if (val & (1 << TAS2780_VSENSE_POWER_EN))
	sense_en = 0;
	else
	sense_en = TAS2780_TDM_CFG5_VSNS_ENABLE;

	ret = snd_soc_component_update_bits(tas2780->component,
	TAS2780_TDM_CFG5, TAS2780_TDM_CFG5_VSNS_ENABLE, sense_en);
	if (ret < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%x enable vSNS error\n",
	__func__, ret);
	goto err;
	}

	if (val & (1 << TAS2780_ISENSE_POWER_EN))
	sense_en = 0;
	else
	sense_en = TAS2780_TDM_CFG6_ISNS_ENABLE;

	ret = snd_soc_component_update_bits(tas2780->component,
	TAS2780_TDM_CFG6, TAS2780_TDM_CFG6_ISNS_ENABLE, sense_en);
	if (ret < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%x enable iSNS error\n",
	__func__, ret);
	goto err;
	}
	ret = 0;
	err:
	return ret;
	}

	static int tas2780_set_samplerate(
	struct tas2780_priv *tas2780, int samplerate)
	{
	struct snd_soc_component *component = tas2780->component;
	int ramp_rate_val;
	int ret;

	switch (samplerate) {
	case 48000:
	ramp_rate_val = TAS2780_TDM_CFG0_SMP_48KHZ \|
	TAS2780_TDM_CFG0_44_1_48KHZ;
	break;
	case 44100:
	ramp_rate_val = TAS2780_TDM_CFG0_SMP_44_1KHZ \|
	TAS2780_TDM_CFG0_44_1_48KHZ;
	break;
	case 96000:
	ramp_rate_val = TAS2780_TDM_CFG0_SMP_48KHZ \|
	TAS2780_TDM_CFG0_88_2_96KHZ;
	break;
	case 88200:
	ramp_rate_val = TAS2780_TDM_CFG0_SMP_44_1KHZ \|
	TAS2780_TDM_CFG0_88_2_96KHZ;
	break;
	default:
	return -EINVAL;
	}
	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG0,
	TAS2780_TDM_CFG0_SMP_MASK \| TAS2780_TDM_CFG0_MASK,
	ramp_rate_val);
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set ramp_rate_val\n",
	__func__, ret);
	goto err;
	}
	ret = 0;
	err:
	return ret;
	}

	static int tas2780_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 tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	int ret;

	ret = tas2780_set_bitwidth(tas2780, params_format(params));
	if (ret < 0)
	return ret;

	return tas2780_set_samplerate(tas2780, params_rate(params));
	}

	static int tas2780_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
	{
	struct snd_soc_component *component = dai->component;
	struct tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
	int iface;
	int ret = 0;

	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
	case SND_SOC_DAIFMT_NB_NF:
	asi_cfg_1 = TAS2780_TDM_CFG1_RX_RISING;
	break;
	case SND_SOC_DAIFMT_IB_NF:
	asi_cfg_1 = TAS2780_TDM_CFG1_RX_FALLING;
	break;
	default:
	dev_err(tas2780->dev, "ASI format Inverse is not found\n");
	return -EINVAL;
	}

	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG1,
	TAS2780_TDM_CFG1_RX_MASK, asi_cfg_1);
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set asi_cfg_1\n",
	__func__, ret);
	goto err;
	}

	if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK) == SND_SOC_DAIFMT_I2S)
	\|\| ((fmt & SND_SOC_DAIFMT_FORMAT_MASK)
	== SND_SOC_DAIFMT_DSP_A)){
	iface = TAS2780_TDM_CFG2_SCFG_I2S;
	tdm_rx_start_slot = 1;
	} else {
	if (((fmt & SND_SOC_DAIFMT_FORMAT_MASK)
	== SND_SOC_DAIFMT_DSP_B)
	\|\| ((fmt & SND_SOC_DAIFMT_FORMAT_MASK)
	== SND_SOC_DAIFMT_LEFT_J)) {
	iface = TAS2780_TDM_CFG2_SCFG_LEFT_J;
	tdm_rx_start_slot = 0;
	} else {
	dev_err(tas2780->dev,
	"%s:DAI Format is not found, fmt=0x%x\n",
	__func__, fmt);
	ret = -EINVAL;
	goto err;
	}
	}
	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG1,
	TAS2780_TDM_CFG1_MASK,
	(tdm_rx_start_slot << TAS2780_TDM_CFG1_51_SHIFT));
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set tdm_rx_start_slot\n",
	__func__, ret);
	goto err;
	}

	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG2,
	TAS2780_TDM_CFG2_SCFG_MASK, iface);
	if (ret < 0) {
	dev_err(tas2780->dev, "%s:errCode:0x%x Failed to set iface\n",
	__func__, ret);
	goto err;
	}
	ret = 0;
	err:
	return ret;
	}

	static int tas2780_set_dai_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 tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	int left_slot, right_slot;
	int slots_cfg;
	int slot_size;
	int ret = 0;

	if (tx_mask == 0 \|\| rx_mask != 0)
	return -EINVAL;

	left_slot = __ffs(tx_mask);
	tx_mask &= ~(1 << left_slot);
	if (tx_mask == 0) {
	right_slot = left_slot;
	} else {
	right_slot = __ffs(tx_mask);
	tx_mask &= ~(1 << right_slot);
	}

	if (tx_mask != 0 \|\| left_slot >= slots \|\| right_slot >= slots)
	return -EINVAL;

	slots_cfg = (right_slot << TAS2780_TDM_CFG3_RXS_SHIFT) \| left_slot;
	ret = snd_soc_component_write(component, TAS2780_TDM_CFG3, slots_cfg);
	if (ret) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set slots_cfg\n",
	__func__, ret);
	goto err;
	}

	switch (slot_width) {
	case 16:
	slot_size = TAS2780_TDM_CFG2_RXS_16BITS;
	break;
	case 24:
	slot_size = TAS2780_TDM_CFG2_RXS_24BITS;
	break;
	case 32:
	slot_size = TAS2780_TDM_CFG2_RXS_32BITS;
	break;
	default:
	ret = -EINVAL;
	goto err;
	}

	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG2,
	TAS2780_TDM_CFG2_RXS_MASK, slot_size);
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set slot_size\n",
	__func__, ret);
	goto err;
	}

	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG5,
	TAS2780_TDM_CFG5_50_MASK, tas2780->v_sense_slot);
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set v_sense_slot\n",
	__func__, ret);
	goto err;
	}

	ret = snd_soc_component_update_bits(component, TAS2780_TDM_CFG6,
	TAS2780_TDM_CFG6_50_MASK, tas2780->i_sense_slot);
	if (ret < 0) {
	dev_err(tas2780->dev,
	"%s:errCode:0x%x Failed to set i_sense_slot\n",
	__func__, ret);
	goto err;
	}
	ret = 0;
	err:
	return ret;
	}

	static const struct snd_soc_dai_ops tas2780_dai_ops = {
	.mute_stream = tas2780_mute,
	.hw_params = tas2780_hw_params,
	.set_fmt = tas2780_set_fmt,
	.set_tdm_slot = tas2780_set_dai_tdm_slot,
	.no_capture_mute = 1,
	};

	#define TAS2780_FORMATS (SNDRV_PCM_FMTBIT_S16_LE \| SNDRV_PCM_FMTBIT_S20_3LE \|\
	SNDRV_PCM_FMTBIT_S24_LE \| SNDRV_PCM_FMTBIT_S32_LE)

	#define TAS2780_RATES (SNDRV_PCM_RATE_44100 \| SNDRV_PCM_RATE_48000 \|\
	SNDRV_PCM_RATE_96000 \| SNDRV_PCM_RATE_88200)

	static struct snd_soc_dai_driver tas2780_dai_driver[] = {
	{
	.name = "tas2780 ASI1",
	.id = 0,
	.playback = {
	.stream_name = "ASI1 Playback",
	.channels_min = 2,
	.channels_max = 2,
	.rates = TAS2780_RATES,
	.formats = TAS2780_FORMATS,
	},
	.capture = {
	.stream_name = "ASI1 Capture",
	.channels_min = 1,
	.channels_max = 2,
	.rates = TAS2780_RATES,
	.formats = TAS2780_FORMATS,
	},
	.ops = &tas2780_dai_ops,
	.symmetric_rate = 1,
	},
	};

	static int tas2780_codec_probe(struct snd_soc_component *component)
	{
	struct tas2780_priv *tas2780 =
	snd_soc_component_get_drvdata(component);
	int ret = 0;

	tas2780->component = component;

	tas2780_reset(tas2780);
	ret = snd_soc_component_update_bits(component,
	TAS2780_IC_CFG, TAS2780_IC_CFG_MASK,
	TAS2780_IC_CFG_ENABLE);
	if (ret < 0)
	dev_err(tas2780->dev, "%s:errCode:0x%0x\n",
	__func__, ret);

	return ret;
	}

	static DECLARE_TLV_DB_SCALE(tas2780_digital_tlv, 1100, 50, 0);
	static DECLARE_TLV_DB_SCALE(tas2780_playback_volume, -10000, 50, 0);

	static const struct snd_kcontrol_new tas2780_snd_controls[] = {
	SOC_SINGLE_TLV("Speaker Volume", TAS2780_DVC, 0,
	TAS2780_DVC_MAX, 1, tas2780_playback_volume),
	SOC_SINGLE_TLV("Amp Gain Volume", TAS2780_CHNL_0, 0, 0x14, 0,
	tas2780_digital_tlv),
	};

	static const struct snd_soc_component_driver soc_component_driver_tas2780 = {
	.probe = tas2780_codec_probe,
	#ifdef CONFIG_PM
	.suspend = tas2780_codec_suspend,
	.resume = tas2780_codec_resume,
	#endif
	.controls = tas2780_snd_controls,
	.num_controls = ARRAY_SIZE(tas2780_snd_controls),
	.dapm_widgets = tas2780_dapm_widgets,
	.num_dapm_widgets = ARRAY_SIZE(tas2780_dapm_widgets),
	.dapm_routes = tas2780_audio_map,
	.num_dapm_routes = ARRAY_SIZE(tas2780_audio_map),
	.idle_bias_on = 1,
	.endianness = 1,
	};

	static const struct reg_default tas2780_reg_defaults[] = {
	{ TAS2780_PAGE, 0x00 },
	{ TAS2780_SW_RST, 0x00 },
	{ TAS2780_PWR_CTRL, 0x1a },
	{ TAS2780_DVC, 0x00 },
	{ TAS2780_CHNL_0, 0x00 },
	{ TAS2780_TDM_CFG0, 0x09 },
	{ TAS2780_TDM_CFG1, 0x02 },
	{ TAS2780_TDM_CFG2, 0x0a },
	{ TAS2780_TDM_CFG3, 0x10 },
	{ TAS2780_TDM_CFG5, 0x42 },
	};

	static const struct regmap_range_cfg tas2780_regmap_ranges[] = {
	{
	.range_min = 0,
	.range_max = 1 * 128,
	.selector_reg = TAS2780_PAGE,
	.selector_mask = 0xff,
	.selector_shift = 0,
	.window_start = 0,
	.window_len = 128,
	},
	};

	static const struct regmap_config tas2780_i2c_regmap = {
	.reg_bits = 8,
	.val_bits = 8,
	.reg_defaults = tas2780_reg_defaults,
	.num_reg_defaults = ARRAY_SIZE(tas2780_reg_defaults),
	.cache_type = REGCACHE_RBTREE,
	.ranges = tas2780_regmap_ranges,
	.num_ranges = ARRAY_SIZE(tas2780_regmap_ranges),
	.max_register = 1 * 128,
	};

	static int tas2780_parse_dt(struct device dev, struct tas2780_priv tas2780)
	{
	int ret = 0;

	tas2780->reset_gpio = devm_gpiod_get_optional(tas2780->dev, "reset",
	GPIOD_OUT_HIGH);
	if (IS_ERR(tas2780->reset_gpio)) {
	if (PTR_ERR(tas2780->reset_gpio) == -EPROBE_DEFER) {
	tas2780->reset_gpio = NULL;
	return -EPROBE_DEFER;
	}
	}

	ret = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
	&tas2780->i_sense_slot);
	if (ret)
	tas2780->i_sense_slot = 0;

	ret = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
	&tas2780->v_sense_slot);
	if (ret)
	tas2780->v_sense_slot = 2;

	return 0;
	}

	static int tas2780_i2c_probe(struct i2c_client *client)
	{
	struct tas2780_priv *tas2780;
	int result;

	tas2780 = devm_kzalloc(&client->dev, sizeof(struct tas2780_priv),
	GFP_KERNEL);
	if (!tas2780)
	return -ENOMEM;
	tas2780->dev = &client->dev;
	i2c_set_clientdata(client, tas2780);
	dev_set_drvdata(&client->dev, tas2780);

	tas2780->regmap = devm_regmap_init_i2c(client, &tas2780_i2c_regmap);
	if (IS_ERR(tas2780->regmap)) {
	result = PTR_ERR(tas2780->regmap);
	dev_err(&client->dev, "Failed to allocate register map: %d\n",
	result);
	return result;
	}

	if (client->dev.of_node) {
	result = tas2780_parse_dt(&client->dev, tas2780);
	if (result) {
	dev_err(tas2780->dev,
	"%s: Failed to parse devicetree\n", __func__);
	return result;
	}
	}

	return devm_snd_soc_register_component(tas2780->dev,
	&soc_component_driver_tas2780, tas2780_dai_driver,
	ARRAY_SIZE(tas2780_dai_driver));
	}

	static const struct i2c_device_id tas2780_i2c_id[] = {
	{ "tas2780"},
	{ }
	};
	MODULE_DEVICE_TABLE(i2c, tas2780_i2c_id);

	#if defined(CONFIG_OF)
	static const struct of_device_id tas2780_of_match[] = {
	{ .compatible = "ti,tas2780" },
	{},
	};
	MODULE_DEVICE_TABLE(of, tas2780_of_match);
	#endif

	static struct i2c_driver tas2780_i2c_driver = {
	.driver = {
	.name = "tas2780",
	.of_match_table = of_match_ptr(tas2780_of_match),
	},
	.probe = tas2780_i2c_probe,
	.id_table = tas2780_i2c_id,
	};
	module_i2c_driver(tas2780_i2c_driver);

	MODULE_AUTHOR("Raphael Xu <raphael-xu@ti.com>");
	MODULE_DESCRIPTION("TAS2780 I2C Smart Amplifier driver");
	MODULE_LICENSE("GPL");