ASoC: tas2764: Add the driver for the TAS2764

Introduce the Texas Instruments TAS2764 amplifier driver
with I/V sense for loud speaker applications.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Link: https://lore.kernel.org/r/20201007155341.10139-2-dmurphy@ti.comSigned-off-by: Mark Brown <broonie@kernel.org>

sound/soc/codecs/Kconfig

@@ -195,6 +195,7 @@ config SND_SOC_ALL_CODECS
 	imply SND_SOC_STI_SAS
 	imply SND_SOC_TAS2552
 	imply SND_SOC_TAS2562
+	imply SND_SOC_TAS2764
 	imply SND_SOC_TAS2770
 	imply SND_SOC_TAS5086
 	imply SND_SOC_TAS571X
@@ -1303,6 +1304,10 @@ config SND_SOC_TAS2562
 	tristate "Texas Instruments TAS2562 Mono Audio amplifier"
 	depends on I2C
 
+config SND_SOC_TAS2764
+	tristate "Texas Instruments TAS2764 Mono Audio amplifier"
+	depends on I2C
+
 config SND_SOC_TAS2770
 	tristate "Texas Instruments TAS2770 speaker amplifier"
 	depends on I2C

sound/soc/codecs/Makefile

@@ -304,6 +304,7 @@ snd-soc-simple-amplifier-objs := simple-amplifier.o
 snd-soc-tpa6130a2-objs := tpa6130a2.o
 snd-soc-tas2552-objs := tas2552.o
 snd-soc-tas2562-objs := tas2562.o
+snd-soc-tas2764-objs := tas2764.o
 
 obj-$(CONFIG_SND_SOC_88PM860X)	+= snd-soc-88pm860x.o
 obj-$(CONFIG_SND_SOC_AB8500_CODEC)	+= snd-soc-ab8500-codec.o
@@ -517,6 +518,7 @@ obj-$(CONFIG_SND_SOC_STAC9766)	+= snd-soc-stac9766.o
 obj-$(CONFIG_SND_SOC_STI_SAS)	+= snd-soc-sti-sas.o
 obj-$(CONFIG_SND_SOC_TAS2552)	+= snd-soc-tas2552.o
 obj-$(CONFIG_SND_SOC_TAS2562)	+= snd-soc-tas2562.o
+obj-$(CONFIG_SND_SOC_TAS2764)	+= snd-soc-tas2764.o
 obj-$(CONFIG_SND_SOC_TAS5086)	+= snd-soc-tas5086.o
 obj-$(CONFIG_SND_SOC_TAS571X)	+= snd-soc-tas571x.o
 obj-$(CONFIG_SND_SOC_TAS5720)	+= snd-soc-tas5720.o

sound/soc/codecs/tas2764.c

+// SPDX-License-Identifier: GPL-2.0
+//
+// Driver for the Texas Instruments TAS2764 CODEC
+// Copyright (C) 2020 Texas Instruments Inc.
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/err.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+#include <linux/regmap.h>
+#include <linux/of.h>
+#include <linux/of_gpio.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#include "tas2764.h"
+
+struct tas2764_priv {
+	struct snd_soc_component *component;
+	struct gpio_desc *reset_gpio;
+	struct gpio_desc *sdz_gpio;
+	struct regmap *regmap;
+	struct device *dev;
+	
+	int v_sense_slot;
+	int i_sense_slot;
+};
+
+static void tas2764_reset(struct tas2764_priv *tas2764)
+{
+	if (tas2764->reset_gpio) {
+		gpiod_set_value_cansleep(tas2764->reset_gpio, 0);
+		msleep(20);
+		gpiod_set_value_cansleep(tas2764->reset_gpio, 1);
+	}
+
+	snd_soc_component_write(tas2764->component, TAS2764_SW_RST,
+				TAS2764_RST);
+}
+
+static int tas2764_set_bias_level(struct snd_soc_component *component,
+				 enum snd_soc_bias_level level)
+{
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+		snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					      TAS2764_PWR_CTRL_MASK,
+					      TAS2764_PWR_CTRL_ACTIVE);
+		break;
+	case SND_SOC_BIAS_STANDBY:
+	case SND_SOC_BIAS_PREPARE:
+		snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					      TAS2764_PWR_CTRL_MASK,
+					      TAS2764_PWR_CTRL_MUTE);
+		break;
+	case SND_SOC_BIAS_OFF:
+		snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					      TAS2764_PWR_CTRL_MASK,
+					      TAS2764_PWR_CTRL_SHUTDOWN);
+		break;
+
+	default:
+		dev_err(tas2764->dev,
+				"wrong power level setting %d\n", level);
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+#ifdef CONFIG_PM
+static int tas2764_codec_suspend(struct snd_soc_component *component)
+{
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					    TAS2764_PWR_CTRL_MASK,
+					    TAS2764_PWR_CTRL_SHUTDOWN);
+
+	if (ret < 0)
+		return ret;
+
+	if (tas2764->sdz_gpio)
+		gpiod_set_value_cansleep(tas2764->sdz_gpio, 0);
+
+	regcache_cache_only(tas2764->regmap, true);
+	regcache_mark_dirty(tas2764->regmap);
+
+	return 0;
+}
+
+static int tas2764_codec_resume(struct snd_soc_component *component)
+{
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	if (tas2764->sdz_gpio)
+		gpiod_set_value_cansleep(tas2764->sdz_gpio, 1);
+
+	ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					    TAS2764_PWR_CTRL_MASK,
+					    TAS2764_PWR_CTRL_ACTIVE);
+
+	if (ret < 0)
+		return ret;
+
+	regcache_cache_only(tas2764->regmap, false);
+
+	return regcache_sync(tas2764->regmap);
+}
+#else
+#define tas2764_codec_suspend NULL
+#define tas2764_codec_resume NULL
+#endif
+
+static const char * const tas2764_ASI1_src[] = {
+	"I2C offset", "Left", "Right", "LeftRightDiv2",
+};
+
+static SOC_ENUM_SINGLE_DECL(
+	tas2764_ASI1_src_enum, TAS2764_TDM_CFG2, 4, tas2764_ASI1_src);
+
+static const struct snd_kcontrol_new tas2764_asi1_mux =
+	SOC_DAPM_ENUM("ASI1 Source", tas2764_ASI1_src_enum);
+
+static int tas2764_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);
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	switch (event) {
+	case SND_SOC_DAPM_POST_PMU:
+		ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+						    TAS2764_PWR_CTRL_MASK,
+						    TAS2764_PWR_CTRL_MUTE);
+		break;
+	case SND_SOC_DAPM_PRE_PMD:
+		ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+						    TAS2764_PWR_CTRL_MASK,
+						    TAS2764_PWR_CTRL_SHUTDOWN);
+		break;
+	default:
+		dev_err(tas2764->dev, "Unsupported event\n");
+		return -EINVAL;
+	}
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static const struct snd_kcontrol_new isense_switch =
+	SOC_DAPM_SINGLE("Switch", TAS2764_PWR_CTRL, TAS2764_ISENSE_POWER_EN, 1, 1);
+static const struct snd_kcontrol_new vsense_switch =
+	SOC_DAPM_SINGLE("Switch", TAS2764_PWR_CTRL, TAS2764_VSENSE_POWER_EN, 1, 1);
+
+static const struct snd_soc_dapm_widget tas2764_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, &tas2764_asi1_mux),
+	SND_SOC_DAPM_SWITCH("ISENSE", TAS2764_PWR_CTRL, TAS2764_ISENSE_POWER_EN,
+			    1, &isense_switch),
+	SND_SOC_DAPM_SWITCH("VSENSE", TAS2764_PWR_CTRL, TAS2764_VSENSE_POWER_EN,
+			    1, &vsense_switch),
+	SND_SOC_DAPM_DAC_E("DAC", NULL, SND_SOC_NOPM, 0, 0, tas2764_dac_event,
+			   SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+	SND_SOC_DAPM_OUTPUT("OUT"),
+	SND_SOC_DAPM_SIGGEN("VMON"),
+	SND_SOC_DAPM_SIGGEN("IMON")
+};
+
+static const struct snd_soc_dapm_route tas2764_audio_map[] = {
+	{"ASI1 Sel", "I2C offset", "ASI1"},
+	{"ASI1 Sel", "Left", "ASI1"},
+	{"ASI1 Sel", "Right", "ASI1"},
+	{"ASI1 Sel", "LeftRightDiv2", "ASI1"},
+	{"DAC", NULL, "ASI1 Sel"},
+	{"OUT", NULL, "DAC"},
+	{"ISENSE", "Switch", "IMON"},
+	{"VSENSE", "Switch", "VMON"},
+};
+
+static int tas2764_mute(struct snd_soc_dai *dai, int mute, int direction)
+{
+	struct snd_soc_component *component = dai->component;
+	int ret;
+
+	ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					    TAS2764_PWR_CTRL_MASK,
+					    mute ? TAS2764_PWR_CTRL_MUTE : 0);
+
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tas2764_set_bitwidth(struct tas2764_priv *tas2764, int bitwidth)
+{
+	struct snd_soc_component *component = tas2764->component;
+	int sense_en;
+	int val;
+	int ret;
+
+	switch (bitwidth) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		ret = snd_soc_component_update_bits(component,
+						    TAS2764_TDM_CFG2,
+						    TAS2764_TDM_CFG2_RXW_MASK,
+						    TAS2764_TDM_CFG2_RXW_16BITS);
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		ret = snd_soc_component_update_bits(component,
+						    TAS2764_TDM_CFG2,
+						    TAS2764_TDM_CFG2_RXW_MASK,
+						    TAS2764_TDM_CFG2_RXW_24BITS);
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		ret = snd_soc_component_update_bits(component,
+						    TAS2764_TDM_CFG2,
+						    TAS2764_TDM_CFG2_RXW_MASK,
+						    TAS2764_TDM_CFG2_RXW_32BITS);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	if (ret < 0)
+		return ret;
+
+	val = snd_soc_component_read(tas2764->component, TAS2764_PWR_CTRL);
+	if (val < 0)
+		return val;
+
+	if (val & (1 << TAS2764_VSENSE_POWER_EN))
+		sense_en = 0;
+	else
+		sense_en = TAS2764_TDM_CFG5_VSNS_ENABLE;
+
+	ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG5,
+					    TAS2764_TDM_CFG5_VSNS_ENABLE,
+					    sense_en);
+	if (ret < 0)
+		return ret;
+
+	if (val & (1 << TAS2764_ISENSE_POWER_EN))
+		sense_en = 0;
+	else
+		sense_en = TAS2764_TDM_CFG6_ISNS_ENABLE;
+
+	ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG6,
+					    TAS2764_TDM_CFG6_ISNS_ENABLE,
+					    sense_en);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tas2764_set_samplerate(struct tas2764_priv *tas2764, int samplerate)
+{
+	struct snd_soc_component *component = tas2764->component;
+	int ramp_rate_val;
+	int ret;
+
+	switch (samplerate) {
+	case 48000:
+		ramp_rate_val = TAS2764_TDM_CFG0_SMP_48KHZ |
+				TAS2764_TDM_CFG0_44_1_48KHZ;
+		break;
+	case 44100:
+		ramp_rate_val = TAS2764_TDM_CFG0_SMP_44_1KHZ |
+				TAS2764_TDM_CFG0_44_1_48KHZ;
+		break;
+	case 96000:
+		ramp_rate_val = TAS2764_TDM_CFG0_SMP_48KHZ |
+				TAS2764_TDM_CFG0_88_2_96KHZ;
+		break;
+	case 88200:
+		ramp_rate_val = TAS2764_TDM_CFG0_SMP_44_1KHZ |
+				TAS2764_TDM_CFG0_88_2_96KHZ;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG0,
+					    TAS2764_TDM_CFG0_SMP_MASK |
+					    TAS2764_TDM_CFG0_MASK,
+					    ramp_rate_val);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tas2764_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 tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	ret = tas2764_set_bitwidth(tas2764, params_format(params));
+	if (ret < 0)
+		return ret;
+
+	return tas2764_set_samplerate(tas2764, params_rate(params));
+}
+
+static int tas2764_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct snd_soc_component *component = dai->component;
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	u8 tdm_rx_start_slot = 0, asi_cfg_1 = 0;
+	int iface;
+	int ret;
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		asi_cfg_1 = TAS2764_TDM_CFG1_RX_RISING;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		asi_cfg_1 = TAS2764_TDM_CFG1_RX_FALLING;
+		break;
+	default:
+		dev_err(tas2764->dev, "ASI format Inverse is not found\n");
+		return -EINVAL;
+	}
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG1,
+					    TAS2764_TDM_CFG1_RX_MASK,
+					    asi_cfg_1);
+	if (ret < 0)
+		return ret;
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+	case SND_SOC_DAIFMT_DSP_A:
+		iface = TAS2764_TDM_CFG2_SCFG_I2S;
+		tdm_rx_start_slot = 1;
+		break;
+	case SND_SOC_DAIFMT_DSP_B:
+	case SND_SOC_DAIFMT_LEFT_J:
+		iface = TAS2764_TDM_CFG2_SCFG_LEFT_J;
+		tdm_rx_start_slot = 0;
+		break;
+	default:
+		dev_err(tas2764->dev,
+			"DAI Format is not found, fmt=0x%x\n", fmt);
+		return -EINVAL;
+	}
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG1,
+					    TAS2764_TDM_CFG1_MASK,
+					    (tdm_rx_start_slot << TAS2764_TDM_CFG1_51_SHIFT));
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG2,
+					    TAS2764_TDM_CFG2_SCFG_MASK, iface);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tas2764_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 tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	int left_slot, right_slot;
+	int slots_cfg;
+	int slot_size;
+	int ret;
+
+	if (tx_mask == 0 || rx_mask != 0)
+		return -EINVAL;
+
+	if (slots == 1) {
+		if (tx_mask != 1)
+			return -EINVAL;
+		left_slot = 0;
+		right_slot = 0;
+	} else {
+		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 << TAS2764_TDM_CFG3_RXS_SHIFT) | left_slot;
+
+	ret = snd_soc_component_write(component, TAS2764_TDM_CFG3, slots_cfg);
+	if (ret)
+		return ret;
+
+	switch (slot_width) {
+	case 16:
+		slot_size = TAS2764_TDM_CFG2_RXS_16BITS;
+		break;
+	case 24:
+		slot_size = TAS2764_TDM_CFG2_RXS_24BITS;
+		break;
+	case 32:
+		slot_size = TAS2764_TDM_CFG2_RXS_32BITS;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG2,
+					    TAS2764_TDM_CFG2_RXS_MASK,
+					    slot_size);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG5,
+					    TAS2764_TDM_CFG5_50_MASK,
+					    tas2764->v_sense_slot);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_component_update_bits(component, TAS2764_TDM_CFG6,
+					    TAS2764_TDM_CFG6_50_MASK,
+					    tas2764->i_sense_slot);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_dai_ops tas2764_dai_ops = {
+	.mute_stream = tas2764_mute,
+	.hw_params  = tas2764_hw_params,
+	.set_fmt    = tas2764_set_fmt,
+	.set_tdm_slot = tas2764_set_dai_tdm_slot,
+	.no_capture_mute = 1,
+};
+
+#define TAS2764_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+			 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+#define TAS2764_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |\
+		       SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_88200)
+
+static struct snd_soc_dai_driver tas2764_dai_driver[] = {
+	{
+		.name = "tas2764 ASI1",
+		.id = 0,
+		.playback = {
+			.stream_name    = "ASI1 Playback",
+			.channels_min   = 2,
+			.channels_max   = 2,
+			.rates      = TAS2764_RATES,
+			.formats    = TAS2764_FORMATS,
+		},
+		.capture = {
+			.stream_name    = "ASI1 Capture",
+			.channels_min   = 0,
+			.channels_max   = 2,
+			.rates = TAS2764_RATES,
+			.formats = TAS2764_FORMATS,
+		},
+		.ops = &tas2764_dai_ops,
+		.symmetric_rates = 1,
+	},
+};
+
+static int tas2764_codec_probe(struct snd_soc_component *component)
+{
+	struct tas2764_priv *tas2764 = snd_soc_component_get_drvdata(component);
+	int ret;
+
+	tas2764->component = component;
+
+	if (tas2764->sdz_gpio)
+		gpiod_set_value_cansleep(tas2764->sdz_gpio, 1);
+
+	tas2764_reset(tas2764);
+
+	ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG5,
+					    TAS2764_TDM_CFG5_VSNS_ENABLE, 0);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_component_update_bits(tas2764->component, TAS2764_TDM_CFG6,
+					    TAS2764_TDM_CFG6_ISNS_ENABLE, 0);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_component_update_bits(component, TAS2764_PWR_CTRL,
+					    TAS2764_PWR_CTRL_MASK,
+					    TAS2764_PWR_CTRL_MUTE);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static DECLARE_TLV_DB_SCALE(tas2764_digital_tlv, 1100, 50, 0);
+static DECLARE_TLV_DB_SCALE(tas2764_playback_volume, -10000, 50, 0);
+
+static const struct snd_kcontrol_new tas2764_snd_controls[] = {
+	SOC_SINGLE_TLV("Speaker Volume", TAS2764_DVC, 0,
+		       TAS2764_DVC_MAX, 1, tas2764_playback_volume),
+	SOC_SINGLE_TLV("Amp Gain Volume", TAS2764_CHNL_0, 0, 0x14, 0,
+		       tas2764_digital_tlv),
+};
+
+static const struct snd_soc_component_driver soc_component_driver_tas2764 = {
+	.probe			= tas2764_codec_probe,
+	.suspend		= tas2764_codec_suspend,
+	.resume			= tas2764_codec_resume,
+	.set_bias_level		= tas2764_set_bias_level,
+	.controls		= tas2764_snd_controls,
+	.num_controls		= ARRAY_SIZE(tas2764_snd_controls),
+	.dapm_widgets		= tas2764_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(tas2764_dapm_widgets),
+	.dapm_routes		= tas2764_audio_map,
+	.num_dapm_routes	= ARRAY_SIZE(tas2764_audio_map),
+	.idle_bias_on		= 1,
+	.endianness		= 1,
+	.non_legacy_dai_naming	= 1,
+};
+
+static const struct reg_default tas2764_reg_defaults[] = {
+	{ TAS2764_PAGE, 0x00 },
+	{ TAS2764_SW_RST, 0x00 },
+	{ TAS2764_PWR_CTRL, 0x1a },
+	{ TAS2764_DVC, 0x00 },
+	{ TAS2764_CHNL_0, 0x00 },
+	{ TAS2764_TDM_CFG0, 0x09 },
+	{ TAS2764_TDM_CFG1, 0x02 },
+	{ TAS2764_TDM_CFG2, 0x0a },
+	{ TAS2764_TDM_CFG3, 0x10 },
+	{ TAS2764_TDM_CFG5, 0x42 },
+};
+
+static const struct regmap_range_cfg tas2764_regmap_ranges[] = {
+	{
+		.range_min = 0,
+		.range_max = 1 * 128,
+		.selector_reg = TAS2764_PAGE,
+		.selector_mask = 0xff,
+		.selector_shift = 0,
+		.window_start = 0,
+		.window_len = 128,
+	},
+};
+
+static const struct regmap_config tas2764_i2c_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+	.reg_defaults = tas2764_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(tas2764_reg_defaults),
+	.cache_type = REGCACHE_RBTREE,
+	.ranges = tas2764_regmap_ranges,
+	.num_ranges = ARRAY_SIZE(tas2764_regmap_ranges),
+	.max_register = 1 * 128,
+};
+
+static int tas2764_parse_dt(struct device *dev, struct tas2764_priv *tas2764)
+{
+	int ret = 0;
+
+	tas2764->reset_gpio = devm_gpiod_get_optional(tas2764->dev, "reset",
+						      GPIOD_OUT_HIGH);
+	if (IS_ERR(tas2764->reset_gpio)) {
+		if (PTR_ERR(tas2764->reset_gpio) == -EPROBE_DEFER) {
+			tas2764->reset_gpio = NULL;
+			return -EPROBE_DEFER;
+		}
+	}
+
+	tas2764->sdz_gpio = devm_gpiod_get_optional(dev, "shutdown", GPIOD_OUT_HIGH);
+	if (IS_ERR(tas2764->sdz_gpio)) {
+		if (PTR_ERR(tas2764->sdz_gpio) == -EPROBE_DEFER)
+			return -EPROBE_DEFER;
+
+		tas2764->sdz_gpio = NULL;
+	}
+
+	ret = fwnode_property_read_u32(dev->fwnode, "ti,imon-slot-no",
+				       &tas2764->i_sense_slot);
+	if (ret)
+		tas2764->i_sense_slot = 0;
+
+	ret = fwnode_property_read_u32(dev->fwnode, "ti,vmon-slot-no",
+				       &tas2764->v_sense_slot);
+	if (ret)
+		tas2764->v_sense_slot = 2;
+
+	return 0;
+}
+
+static int tas2764_i2c_probe(struct i2c_client *client,
+			const struct i2c_device_id *id)
+{
+	struct tas2764_priv *tas2764;
+	int result;
+
+	tas2764 = devm_kzalloc(&client->dev, sizeof(struct tas2764_priv),
+			       GFP_KERNEL);
+	if (!tas2764)
+		return -ENOMEM;
+
+	tas2764->dev = &client->dev;
+	i2c_set_clientdata(client, tas2764);
+	dev_set_drvdata(&client->dev, tas2764);
+
+	tas2764->regmap = devm_regmap_init_i2c(client, &tas2764_i2c_regmap);
+	if (IS_ERR(tas2764->regmap)) {
+		result = PTR_ERR(tas2764->regmap);
+		dev_err(&client->dev, "Failed to allocate register map: %d\n",
+					result);
+		return result;
+	}
+
+	if (client->dev.of_node) {
+		result = tas2764_parse_dt(&client->dev, tas2764);
+		if (result) {
+			dev_err(tas2764->dev, "%s: Failed to parse devicetree\n",
+				__func__);
+			return result;
+		}
+	}
+
+	return devm_snd_soc_register_component(tas2764->dev,
+					       &soc_component_driver_tas2764,
+					       tas2764_dai_driver,
+					       ARRAY_SIZE(tas2764_dai_driver));
+}
+
+static const struct i2c_device_id tas2764_i2c_id[] = {
+	{ "tas2764", 0},
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tas2764_i2c_id);
+
+#if defined(CONFIG_OF)
+static const struct of_device_id tas2764_of_match[] = {
+	{ .compatible = "ti,tas2764" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, tas2764_of_match);
+#endif
+
+static struct i2c_driver tas2764_i2c_driver = {
+	.driver = {
+		.name   = "tas2764",
+		.of_match_table = of_match_ptr(tas2764_of_match),
+	},
+	.probe      = tas2764_i2c_probe,
+	.id_table   = tas2764_i2c_id,
+};
+module_i2c_driver(tas2764_i2c_driver);
+
+MODULE_AUTHOR("Dan Murphy <dmurphy@ti.com>");
+MODULE_DESCRIPTION("TAS2764 I2C Smart Amplifier driver");
+MODULE_LICENSE("GPL v2");

sound/soc/codecs/tas2764.h

+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * tas2764.h - ALSA SoC Texas Instruments TAS2764 Mono Audio Amplifier
+ *
+ * Copyright (C) 2020 Texas Instruments Incorporated -  https://www.ti.com
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ */
+
+#ifndef __TAS2764__
+#define __TAS2764__
+
+/* Book Control Register */
+#define TAS2764_BOOKCTL_PAGE	0
+#define TAS2764_BOOKCTL_REG	127
+#define TAS2764_REG(page, reg)	((page * 128) + reg)
+
+/* Page */
+#define TAS2764_PAGE		TAS2764_REG(0X0, 0x00)
+#define TAS2764_PAGE_PAGE_MASK	255
+
+/* Software Reset */
+#define TAS2764_SW_RST	TAS2764_REG(0X0, 0x01)
+#define TAS2764_RST	BIT(0)
+
+/* Power Control */
+#define TAS2764_PWR_CTRL		TAS2764_REG(0X0, 0x02)
+#define TAS2764_PWR_CTRL_MASK		GENMASK(1, 0)
+#define TAS2764_PWR_CTRL_ACTIVE		0x0
+#define TAS2764_PWR_CTRL_MUTE		BIT(0)
+#define TAS2764_PWR_CTRL_SHUTDOWN	BIT(1)
+
+#define TAS2764_VSENSE_POWER_EN		3
+#define TAS2764_ISENSE_POWER_EN		4
+
+/* Digital Volume Control */
+#define TAS2764_DVC	TAS2764_REG(0X0, 0x1a)
+#define TAS2764_DVC_MAX	0xc9
+
+#define TAS2764_CHNL_0  TAS2764_REG(0X0, 0x03)
+
+/* TDM Configuration Reg0 */
+#define TAS2764_TDM_CFG0		TAS2764_REG(0X0, 0x08)
+#define TAS2764_TDM_CFG0_SMP_MASK	BIT(5)
+#define TAS2764_TDM_CFG0_SMP_48KHZ	0x0
+#define TAS2764_TDM_CFG0_SMP_44_1KHZ	BIT(5)
+#define TAS2764_TDM_CFG0_MASK		GENMASK(3, 1)
+#define TAS2764_TDM_CFG0_44_1_48KHZ	BIT(3)
+#define TAS2764_TDM_CFG0_88_2_96KHZ	(BIT(3) | BIT(1))
+
+/* TDM Configuration Reg1 */
+#define TAS2764_TDM_CFG1		TAS2764_REG(0X0, 0x09)
+#define TAS2764_TDM_CFG1_MASK		GENMASK(5, 1)
+#define TAS2764_TDM_CFG1_51_SHIFT	1
+#define TAS2764_TDM_CFG1_RX_MASK	BIT(0)
+#define TAS2764_TDM_CFG1_RX_RISING	0x0
+#define TAS2764_TDM_CFG1_RX_FALLING	BIT(0)
+
+/* TDM Configuration Reg2 */
+#define TAS2764_TDM_CFG2		TAS2764_REG(0X0, 0x0a)
+#define TAS2764_TDM_CFG2_RXW_MASK	GENMASK(3, 2)
+#define TAS2764_TDM_CFG2_RXW_16BITS	0x0
+#define TAS2764_TDM_CFG2_RXW_24BITS	BIT(3)
+#define TAS2764_TDM_CFG2_RXW_32BITS	(BIT(3) | BIT(2))
+#define TAS2764_TDM_CFG2_RXS_MASK	GENMASK(1, 0)
+#define TAS2764_TDM_CFG2_RXS_16BITS	0x0
+#define TAS2764_TDM_CFG2_RXS_24BITS	BIT(0)
+#define TAS2764_TDM_CFG2_RXS_32BITS	BIT(1)
+#define TAS2764_TDM_CFG2_SCFG_MASK	GENMASK(5, 4)
+#define TAS2764_TDM_CFG2_SCFG_I2S	0x0
+#define TAS2764_TDM_CFG2_SCFG_LEFT_J	BIT(4)
+#define TAS2764_TDM_CFG2_SCFG_RIGHT_J	BIT(5)
+
+/* TDM Configuration Reg3 */
+#define TAS2764_TDM_CFG3		TAS2764_REG(0X0, 0x0c)
+#define TAS2764_TDM_CFG3_RXS_MASK	GENMASK(7, 4)
+#define TAS2764_TDM_CFG3_RXS_SHIFT	0x4
+#define TAS2764_TDM_CFG3_MASK		GENMASK(3, 0)
+
+/* TDM Configuration Reg5 */
+#define TAS2764_TDM_CFG5		TAS2764_REG(0X0, 0x0e)
+#define TAS2764_TDM_CFG5_VSNS_MASK	BIT(6)
+#define TAS2764_TDM_CFG5_VSNS_ENABLE	BIT(6)
+#define TAS2764_TDM_CFG5_50_MASK	GENMASK(5, 0)
+
+/* TDM Configuration Reg6 */
+#define TAS2764_TDM_CFG6		TAS2764_REG(0X0, 0x0f)
+#define TAS2764_TDM_CFG6_ISNS_MASK	BIT(6)
+#define TAS2764_TDM_CFG6_ISNS_ENABLE	BIT(6)
+#define TAS2764_TDM_CFG6_50_MASK	GENMASK(5, 0)
+
+#endif /* __TAS2764__ */