ASoC: cs4234: Add support for Cirrus Logic CS4234 codec

The CS4234 is a highly versatile CODEC that combines 4 channels of
high performance analog to digital conversion, 4 channels of high
performance digital to analog conversion for audio, and 1 channel of
digital to analog conversion to provide a nondelayed audio reference
signal to an external Class H tracking power supply.

DAC5 is only supported as a 5th audio channel. Tracking Power Supply
mode is not currently supported by the driver.

In DSP_A mode the slots for DAC1-4 and optionally DAC5 can be set.
The codec always claims 4 slots for DAC1-4 and these must be in the
same nibble of the mask. The codec has a fixed mapping for ADC slots.

In I2S/LJ modes the codec has a fixed mapping for DAC1-4 and ADC1-4.
DAC5 is not available in these modes.

The MCLK source must be preset to a valid frequency before probe()
because it must be running all the time the codec is out of reset.

The VA_SEL bit will be set automatically to 3.3v or 5v during probe()
based on the reported voltage of the regulator supplying VA.

Signed-off-by: Lucas Tanure <[e-mail]>
Signed-off-by: Charles Keepax <[e-mail]>
Signed-off-by: Richard Fitzgerald <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Mark Brown <[e-mail]>

sound/soc/codecs/Kconfig

···
 	imply SND_SOC_CS42L52
 	imply SND_SOC_CS42L56
 	imply SND_SOC_CS42L73
+	imply SND_SOC_CS4234
 	imply SND_SOC_CS4265
 	imply SND_SOC_CS4270
 	imply SND_SOC_CS4271_I2C
···
 config SND_SOC_CS42L73
 	tristate "Cirrus Logic CS42L73 CODEC"
 	depends on I2C
+
+config SND_SOC_CS4234
+	tristate "Cirrus Logic CS4234 CODEC"
+	depends on I2C
+	select REGMAP_I2C
 
 config SND_SOC_CS4265
 	tristate "Cirrus Logic CS4265 CODEC"

sound/soc/codecs/Makefile

···
 snd-soc-cs42l52-objs := cs42l52.o
 snd-soc-cs42l56-objs := cs42l56.o
 snd-soc-cs42l73-objs := cs42l73.o
+snd-soc-cs4234-objs := cs4234.o
 snd-soc-cs4265-objs := cs4265.o
 snd-soc-cs4270-objs := cs4270.o
 snd-soc-cs4271-objs := cs4271.o
···
 obj-$(CONFIG_SND_SOC_CS42L52)	+= snd-soc-cs42l52.o
 obj-$(CONFIG_SND_SOC_CS42L56)	+= snd-soc-cs42l56.o
 obj-$(CONFIG_SND_SOC_CS42L73)	+= snd-soc-cs42l73.o
+obj-$(CONFIG_SND_SOC_CS4234)	+= snd-soc-cs4234.o
 obj-$(CONFIG_SND_SOC_CS4265)	+= snd-soc-cs4265.o
 obj-$(CONFIG_SND_SOC_CS4270)	+= snd-soc-cs4270.o
 obj-$(CONFIG_SND_SOC_CS4271)	+= snd-soc-cs4271.o

sound/soc/codecs/cs4234.c

···
+// SPDX-License-Identifier: GPL-2.0-only
+// cs4234.c -- ALSA SoC CS4234 driver
+//
+// Copyright (C) 2020 Cirrus Logic, Inc. and
+//                    Cirrus Logic International Semiconductor Ltd.
+//
+
+#include <linux/clk.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/gpio/consumer.h>
+#include <linux/i2c.h>
+#include <linux/jiffies.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <sound/tlv.h>
+#include <linux/workqueue.h>
+
+#include "cs4234.h"
+
+struct cs4234 {
+	struct device *dev;
+	struct regmap *regmap;
+	struct gpio_desc *reset_gpio;
+	struct regulator_bulk_data core_supplies[2];
+	int num_core_supplies;
+	struct completion vq_ramp_complete;
+	struct delayed_work vq_ramp_delay;
+	struct clk *mclk;
+	unsigned long mclk_rate;
+	unsigned long lrclk_rate;
+	unsigned int format;
+	struct snd_ratnum rate_dividers[2];
+	struct snd_pcm_hw_constraint_ratnums rate_constraint;
+};
+
+/* -89.92dB to +6.02dB with step of 0.38dB */
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -8992, 38, 0);
+
+static const char * const cs4234_dac14_delay_text[] = {
+	  "0us", "100us", "150us", "200us", "225us", "250us", "275us", "300us",
+	"325us", "350us", "375us", "400us", "425us", "450us", "475us", "500us",
+};
+static SOC_ENUM_SINGLE_DECL(cs4234_dac14_group_delay, CS4234_TPS_CTRL,
+			    CS4234_GRP_DELAY_SHIFT, cs4234_dac14_delay_text);
+
+static const char * const cs4234_noise_gate_text[] = {
+	"72dB",  "78dB",  "84dB", "90dB", "96dB", "102dB", "138dB", "Disabled",
+};
+static SOC_ENUM_SINGLE_DECL(cs4234_ll_noise_gate, CS4234_LOW_LAT_CTRL1,
+			    CS4234_LL_NG_SHIFT, cs4234_noise_gate_text);
+static SOC_ENUM_SINGLE_DECL(cs4234_dac14_noise_gate, CS4234_DAC_CTRL1,
+			    CS4234_DAC14_NG_SHIFT, cs4234_noise_gate_text);
+static SOC_ENUM_SINGLE_DECL(cs4234_dac5_noise_gate, CS4234_DAC_CTRL2,
+			    CS4234_DAC5_NG_SHIFT, cs4234_noise_gate_text);
+
+static const char * const cs4234_dac5_config_fltr_sel_text[] = {
+	"Interpolation Filter", "Sample and Hold"
+};
+static SOC_ENUM_SINGLE_DECL(cs4234_dac5_config_fltr_sel, CS4234_DAC_CTRL1,
+			    CS4234_DAC5_CFG_FLTR_SHIFT,
+			    cs4234_dac5_config_fltr_sel_text);
+
+static const char * const cs4234_mute_delay_text[] = {
+	"1x",  "4x",  "16x", "64x",
+};
+static SOC_ENUM_SINGLE_DECL(cs4234_mute_delay, CS4234_VOLUME_MODE,
+			    CS4234_MUTE_DELAY_SHIFT, cs4234_mute_delay_text);
+
+static const char * const cs4234_minmax_delay_text[] = {
+	"1x",  "2x",  "4x", "8x", "16x",  "32x", "64x", "128x",
+};
+static SOC_ENUM_SINGLE_DECL(cs4234_min_delay, CS4234_VOLUME_MODE,
+			    CS4234_MIN_DELAY_SHIFT, cs4234_minmax_delay_text);
+static SOC_ENUM_SINGLE_DECL(cs4234_max_delay, CS4234_VOLUME_MODE,
+			    CS4234_MAX_DELAY_SHIFT, cs4234_minmax_delay_text);
+
+static int cs4234_dac14_grp_delay_put(struct snd_kcontrol *kctrl,
+				      struct snd_ctl_elem_value *uctrl)
+{
+	struct snd_soc_component *component = snd_soc_kcontrol_component(kctrl);
+	struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component);
+	struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
+	unsigned int val = 0;
+	int ret = 0;
+
+	snd_soc_dapm_mutex_lock(dapm);
+
+	regmap_read(cs4234->regmap, CS4234_ADC_CTRL2, &val);
+	if ((val & 0x0F) != 0x0F) { // are all the ADCs powerdown
+		ret = -EBUSY;
+		dev_err(component->dev, "Can't change group delay while ADC are ON\n");
+		goto exit;
+	}
+
+	regmap_read(cs4234->regmap, CS4234_DAC_CTRL4, &val);
+	if ((val & 0x1F) != 0x1F) { // are all the DACs powerdown
+		ret = -EBUSY;
+		dev_err(component->dev, "Can't change group delay while DAC are ON\n");
+		goto exit;
+	}
+
+	ret = snd_soc_put_enum_double(kctrl, uctrl);
+exit:
+	snd_soc_dapm_mutex_unlock(dapm);
+
+	return ret;
+}
+
+static void cs4234_vq_ramp_done(struct work_struct *work)
+{
+	struct delayed_work *dw = to_delayed_work(work);
+	struct cs4234 *cs4234 = container_of(dw, struct cs4234, vq_ramp_delay);
+
+	complete_all(&cs4234->vq_ramp_complete);
+}
+
+static int cs4234_set_bias_level(struct snd_soc_component *component,
+				 enum snd_soc_bias_level level)
+{
+	struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component);
+
+	switch (level) {
+	case SND_SOC_BIAS_PREPARE:
+		switch (snd_soc_component_get_bias_level(component)) {
+		case SND_SOC_BIAS_STANDBY:
+			wait_for_completion(&cs4234->vq_ramp_complete);
+			break;
+		default:
+			break;
+		}
+		break;
+	default:
+		break;
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget cs4234_dapm_widgets[] = {
+	SND_SOC_DAPM_AIF_IN("SDRX1", NULL,  0, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SDRX2", NULL,  1, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SDRX3", NULL,  2, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SDRX4", NULL,  3, SND_SOC_NOPM, 0, 0),
+	SND_SOC_DAPM_AIF_IN("SDRX5", NULL,  4, SND_SOC_NOPM, 0, 0),
+
+	SND_SOC_DAPM_DAC("DAC1", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC1_SHIFT, 1),
+	SND_SOC_DAPM_DAC("DAC2", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC2_SHIFT, 1),
+	SND_SOC_DAPM_DAC("DAC3", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC3_SHIFT, 1),
+	SND_SOC_DAPM_DAC("DAC4", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC4_SHIFT, 1),
+	SND_SOC_DAPM_DAC("DAC5", NULL, CS4234_DAC_CTRL4, CS4234_PDN_DAC5_SHIFT, 1),
+
+	SND_SOC_DAPM_OUTPUT("AOUT1"),
+	SND_SOC_DAPM_OUTPUT("AOUT2"),
+	SND_SOC_DAPM_OUTPUT("AOUT3"),
+	SND_SOC_DAPM_OUTPUT("AOUT4"),
+	SND_SOC_DAPM_OUTPUT("AOUT5"),
+
+	SND_SOC_DAPM_INPUT("AIN1"),
+	SND_SOC_DAPM_INPUT("AIN2"),
+	SND_SOC_DAPM_INPUT("AIN3"),
+	SND_SOC_DAPM_INPUT("AIN4"),
+
+	SND_SOC_DAPM_ADC("ADC1", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC1_SHIFT, 1),
+	SND_SOC_DAPM_ADC("ADC2", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC2_SHIFT, 1),
+	SND_SOC_DAPM_ADC("ADC3", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC3_SHIFT, 1),
+	SND_SOC_DAPM_ADC("ADC4", NULL, CS4234_ADC_CTRL2, CS4234_PDN_ADC4_SHIFT, 1),
+
+	SND_SOC_DAPM_AIF_OUT("SDTX1", NULL, 0, SND_SOC_NOPM, 0, 1),
+	SND_SOC_DAPM_AIF_OUT("SDTX2", NULL, 1, SND_SOC_NOPM, 0, 1),
+	SND_SOC_DAPM_AIF_OUT("SDTX3", NULL, 2, SND_SOC_NOPM, 0, 1),
+	SND_SOC_DAPM_AIF_OUT("SDTX4", NULL, 3, SND_SOC_NOPM, 0, 1),
+};
+
+static const struct snd_soc_dapm_route cs4234_dapm_routes[] = {
+	/* Playback */
+	{ "AOUT1", NULL, "DAC1" },
+	{ "AOUT2", NULL, "DAC2" },
+	{ "AOUT3", NULL, "DAC3" },
+	{ "AOUT4", NULL, "DAC4" },
+	{ "AOUT5", NULL, "DAC5" },
+
+	{ "DAC1", NULL, "SDRX1" },
+	{ "DAC2", NULL, "SDRX2" },
+	{ "DAC3", NULL, "SDRX3" },
+	{ "DAC4", NULL, "SDRX4" },
+	{ "DAC5", NULL, "SDRX5" },
+
+	{ "SDRX1", NULL, "Playback" },
+	{ "SDRX2", NULL, "Playback" },
+	{ "SDRX3", NULL, "Playback" },
+	{ "SDRX4", NULL, "Playback" },
+	{ "SDRX5", NULL, "Playback" },
+
+	/* Capture */
+	{ "ADC1", NULL, "AIN1" },
+	{ "ADC2", NULL, "AIN2" },
+	{ "ADC3", NULL, "AIN3" },
+	{ "ADC4", NULL, "AIN4" },
+
+	{ "SDTX1", NULL, "ADC1" },
+	{ "SDTX2", NULL, "ADC2" },
+	{ "SDTX3", NULL, "ADC3" },
+	{ "SDTX4", NULL, "ADC4" },
+
+	{ "Capture", NULL, "SDTX1" },
+	{ "Capture", NULL, "SDTX2" },
+	{ "Capture", NULL, "SDTX3" },
+	{ "Capture", NULL, "SDTX4" },
+};
+
+static const struct snd_kcontrol_new cs4234_snd_controls[] = {
+	SOC_SINGLE_TLV("Master Volume", CS4234_MASTER_VOL, 0, 0xff, 1, dac_tlv),
+	SOC_SINGLE_TLV("DAC1 Volume", CS4234_DAC1_VOL, 0, 0xff, 1, dac_tlv),
+	SOC_SINGLE_TLV("DAC2 Volume", CS4234_DAC2_VOL, 0, 0xff, 1, dac_tlv),
+	SOC_SINGLE_TLV("DAC3 Volume", CS4234_DAC3_VOL, 0, 0xff, 1, dac_tlv),
+	SOC_SINGLE_TLV("DAC4 Volume", CS4234_DAC4_VOL, 0, 0xff, 1, dac_tlv),
+	SOC_SINGLE_TLV("DAC5 Volume", CS4234_DAC5_VOL, 0, 0xff, 1, dac_tlv),
+
+	SOC_SINGLE("DAC5 Soft Ramp Switch", CS4234_DAC_CTRL3, CS4234_DAC5_ATT_SHIFT, 1, 1),
+	SOC_SINGLE("DAC1-4 Soft Ramp Switch", CS4234_DAC_CTRL3, CS4234_DAC14_ATT_SHIFT, 1, 1),
+
+	SOC_SINGLE("ADC HPF Switch", CS4234_ADC_CTRL1, CS4234_ENA_HPF_SHIFT, 1, 0),
+
+	SOC_ENUM_EXT("DAC1-4 Group Delay", cs4234_dac14_group_delay,
+		     snd_soc_get_enum_double, cs4234_dac14_grp_delay_put),
+
+	SOC_SINGLE("ADC1 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC1_SHIFT, 1, 0),
+	SOC_SINGLE("ADC2 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC2_SHIFT, 1, 0),
+	SOC_SINGLE("ADC3 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC3_SHIFT, 1, 0),
+	SOC_SINGLE("ADC4 Invert Switch", CS4234_ADC_CTRL1, CS4234_INV_ADC4_SHIFT, 1, 0),
+
+	SOC_SINGLE("DAC1 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC1_SHIFT, 1, 0),
+	SOC_SINGLE("DAC2 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC2_SHIFT, 1, 0),
+	SOC_SINGLE("DAC3 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC3_SHIFT, 1, 0),
+	SOC_SINGLE("DAC4 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC4_SHIFT, 1, 0),
+	SOC_SINGLE("DAC5 Invert Switch", CS4234_DAC_CTRL2, CS4234_INV_DAC5_SHIFT, 1, 0),
+
+	SOC_SINGLE("ADC1 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC1_SHIFT, 1, 1),
+	SOC_SINGLE("ADC2 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC2_SHIFT, 1, 1),
+	SOC_SINGLE("ADC3 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC3_SHIFT, 1, 1),
+	SOC_SINGLE("ADC4 Switch", CS4234_ADC_CTRL2, CS4234_MUTE_ADC4_SHIFT, 1, 1),
+
+	SOC_SINGLE("DAC1 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC1_SHIFT, 1, 1),
+	SOC_SINGLE("DAC2 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC2_SHIFT, 1, 1),
+	SOC_SINGLE("DAC3 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC3_SHIFT, 1, 1),
+	SOC_SINGLE("DAC4 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC4_SHIFT, 1, 1),
+	SOC_SINGLE("DAC5 Switch", CS4234_DAC_CTRL3, CS4234_MUTE_DAC5_SHIFT, 1, 1),
+	SOC_SINGLE("Low-latency Switch", CS4234_DAC_CTRL3, CS4234_MUTE_LL_SHIFT, 1, 1),
+
+	SOC_SINGLE("DAC1 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1,
+		   CS4234_INV_LL1_SHIFT, 1, 0),
+	SOC_SINGLE("DAC2 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1,
+		   CS4234_INV_LL2_SHIFT, 1, 0),
+	SOC_SINGLE("DAC3 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1,
+		   CS4234_INV_LL3_SHIFT, 1, 0),
+	SOC_SINGLE("DAC4 Low-latency Invert Switch", CS4234_LOW_LAT_CTRL1,
+		   CS4234_INV_LL4_SHIFT, 1, 0),
+
+	SOC_ENUM("Low-latency Noise Gate", cs4234_ll_noise_gate),
+	SOC_ENUM("DAC1-4 Noise Gate", cs4234_dac14_noise_gate),
+	SOC_ENUM("DAC5 Noise Gate", cs4234_dac5_noise_gate),
+
+	SOC_SINGLE("DAC1-4 De-emphasis Switch", CS4234_DAC_CTRL1,
+		   CS4234_DAC14_DE_SHIFT, 1, 0),
+	SOC_SINGLE("DAC5 De-emphasis Switch", CS4234_DAC_CTRL1,
+		   CS4234_DAC5_DE_SHIFT, 1, 0),
+
+	SOC_SINGLE("DAC5 Master Controlled Switch", CS4234_DAC_CTRL1,
+		   CS4234_DAC5_MVC_SHIFT, 1, 0),
+
+	SOC_ENUM("DAC5 Filter", cs4234_dac5_config_fltr_sel),
+
+	SOC_ENUM("Mute Delay", cs4234_mute_delay),
+	SOC_ENUM("Ramp Minimum Delay", cs4234_min_delay),
+	SOC_ENUM("Ramp Maximum Delay", cs4234_max_delay),
+
+};
+
+static int cs4234_dai_set_fmt(struct snd_soc_dai *codec_dai, unsigned int format)
+{
+	struct snd_soc_component *component = codec_dai->component;
+	struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component);
+	unsigned int sp_ctrl = 0;
+
+	cs4234->format = format & SND_SOC_DAIFMT_FORMAT_MASK;
+	switch (cs4234->format) {
+	case SND_SOC_DAIFMT_LEFT_J:
+		sp_ctrl |= CS4234_LEFT_J << CS4234_SP_FORMAT_SHIFT;
+		break;
+	case SND_SOC_DAIFMT_I2S:
+		sp_ctrl |= CS4234_I2S << CS4234_SP_FORMAT_SHIFT;
+		break;
+	case SND_SOC_DAIFMT_DSP_A: /* TDM mode in datasheet */
+		sp_ctrl |= CS4234_TDM << CS4234_SP_FORMAT_SHIFT;
+		break;
+	default:
+		dev_err(component->dev, "Unsupported dai format\n");
+		return -EINVAL;
+	}
+
+	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		break;
+	case SND_SOC_DAIFMT_CBM_CFM:
+		if (cs4234->format == SND_SOC_DAIFMT_DSP_A) {
+			dev_err(component->dev, "Unsupported DSP A format in master mode\n");
+			return -EINVAL;
+		}
+		sp_ctrl |= CS4234_MST_SLV_MASK;
+		break;
+	default:
+		dev_err(component->dev, "Unsupported master/slave mode\n");
+		return -EINVAL;
+	}
+
+	switch (format & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		sp_ctrl |= CS4234_INVT_SCLK_MASK;
+		break;
+	default:
+		dev_err(component->dev, "Unsupported inverted clock setting\n");
+		return -EINVAL;
+	}
+
+	regmap_update_bits(cs4234->regmap, CS4234_SP_CTRL,
+			   CS4234_SP_FORMAT_MASK | CS4234_MST_SLV_MASK | CS4234_INVT_SCLK_MASK,
+			   sp_ctrl);
+
+	return 0;
+}
+
+static int cs4234_dai_hw_params(struct snd_pcm_substream *sub,
+				struct snd_pcm_hw_params *params,
+				struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *component = dai->component;
+	struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component);
+	unsigned int mclk_mult, double_speed = 0;
+	int ret = 0, rate_ad, sample_width;
+
+	cs4234->lrclk_rate = params_rate(params);
+	mclk_mult = cs4234->mclk_rate / cs4234->lrclk_rate;
+
+	if (cs4234->lrclk_rate > 48000) {
+		double_speed = 1;
+		mclk_mult *= 2;
+	}
+
+	switch (mclk_mult) {
+	case 256:
+	case 384:
+	case 512:
+		regmap_update_bits(cs4234->regmap, CS4234_CLOCK_SP,
+				   CS4234_SPEED_MODE_MASK,
+				   double_speed << CS4234_SPEED_MODE_SHIFT);
+		regmap_update_bits(cs4234->regmap, CS4234_CLOCK_SP,
+				   CS4234_MCLK_RATE_MASK,
+				   ((mclk_mult / 128) - 2) << CS4234_MCLK_RATE_SHIFT);
+		break;
+	default:
+		dev_err(component->dev, "Unsupported mclk/lrclk rate\n");
+		return -EINVAL;
+	}
+
+	switch (cs4234->lrclk_rate) {
+	case 48000:
+	case 96000:
+		rate_ad = CS4234_48K;
+		break;
+	case 44100:
+	case 88200:
+		rate_ad = CS4234_44K1;
+		break;
+	case 32000:
+	case 64000:
+		rate_ad = CS4234_32K;
+		break;
+	default:
+		dev_err(component->dev, "Unsupported LR clock\n");
+		return -EINVAL;
+	}
+	regmap_update_bits(cs4234->regmap, CS4234_CLOCK_SP, CS4234_BASE_RATE_MASK,
+			   rate_ad << CS4234_BASE_RATE_SHIFT);
+
+	sample_width = params_width(params);
+	switch (sample_width) {
+	case 16:
+		sample_width = 0;
+		break;
+	case 18:
+		sample_width = 1;
+		break;
+	case 20:
+		sample_width = 2;
+		break;
+	case 24:
+		sample_width = 3;
+		break;
+	default:
+		dev_err(component->dev, "Unsupported sample width\n");
+		return -EINVAL;
+	}
+	if (sub->stream == SNDRV_PCM_STREAM_CAPTURE)
+		regmap_update_bits(cs4234->regmap, CS4234_SAMPLE_WIDTH,
+				   CS4234_SDOUTX_SW_MASK,
+				   sample_width << CS4234_SDOUTX_SW_SHIFT);
+	else
+		regmap_update_bits(cs4234->regmap, CS4234_SAMPLE_WIDTH,
+				CS4234_INPUT_SW_MASK | CS4234_LOW_LAT_SW_MASK | CS4234_DAC5_SW_MASK,
+				sample_width << CS4234_INPUT_SW_SHIFT |
+				sample_width << CS4234_LOW_LAT_SW_SHIFT |
+				sample_width << CS4234_DAC5_SW_SHIFT);
+
+	return ret;
+}
+
+/* Scale MCLK rate by 64 to avoid overflow in the ratnum calculation */
+#define CS4234_MCLK_SCALE  64
+
+static const struct snd_ratnum cs4234_dividers[] = {
+	{
+		.num = 0,
+		.den_min = 256 / CS4234_MCLK_SCALE,
+		.den_max = 512 / CS4234_MCLK_SCALE,
+		.den_step = 128 / CS4234_MCLK_SCALE,
+	},
+	{
+		.num = 0,
+		.den_min = 128 / CS4234_MCLK_SCALE,
+		.den_max = 192 / CS4234_MCLK_SCALE,
+		.den_step = 64 / CS4234_MCLK_SCALE,
+	},
+};
+
+static int cs4234_dai_rule_rate(struct snd_pcm_hw_params *params, struct snd_pcm_hw_rule *rule)
+{
+	struct cs4234 *cs4234 = rule->private;
+	int mclk = cs4234->mclk_rate;
+	struct snd_interval ranges[] = {
+		{ /* Single Speed Mode */
+			.min = mclk / clamp(mclk / 30000, 256, 512),
+			.max = mclk / clamp(mclk / 50000, 256, 512),
+		},
+		{ /* Double Speed Mode */
+			.min = mclk / clamp(mclk / 60000,  128, 256),
+			.max = mclk / clamp(mclk / 100000, 128, 256),
+		},
+	};
+
+	return snd_interval_ranges(hw_param_interval(params, rule->var),
+				   ARRAY_SIZE(ranges), ranges, 0);
+}
+
+static int cs4234_dai_startup(struct snd_pcm_substream *sub, struct snd_soc_dai *dai)
+{
+	struct snd_soc_component *comp = dai->component;
+	struct cs4234 *cs4234 = snd_soc_component_get_drvdata(comp);
+	int i, ret;
+
+	switch (cs4234->format) {
+	case SND_SOC_DAIFMT_LEFT_J:
+	case SND_SOC_DAIFMT_I2S:
+		cs4234->rate_constraint.nrats = 2;
+
+		/*
+		 * Playback only supports 24-bit samples in these modes.
+		 * Note: SNDRV_PCM_HW_PARAM_SAMPLE_BITS constrains the physical
+		 * width, which we don't care about, so constrain the format.
+		 */
+		if (sub->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+			ret = snd_pcm_hw_constraint_mask64(
+						sub->runtime,
+						SNDRV_PCM_HW_PARAM_FORMAT,
+						SNDRV_PCM_FMTBIT_S24_LE |
+						SNDRV_PCM_FMTBIT_S24_3LE);
+			if (ret < 0)
+				return ret;
+
+			ret = snd_pcm_hw_constraint_minmax(sub->runtime,
+							   SNDRV_PCM_HW_PARAM_CHANNELS,
+							   1, 4);
+			if (ret < 0)
+				return ret;
+		}
+
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		cs4234->rate_constraint.nrats = 1;
+		break;
+	default:
+		dev_err(comp->dev, "Startup unsupported DAI format\n");
+		return -EINVAL;
+	}
+
+	for (i = 0; i < cs4234->rate_constraint.nrats; i++)
+		cs4234->rate_dividers[i].num = cs4234->mclk_rate / CS4234_MCLK_SCALE;
+
+	ret = snd_pcm_hw_constraint_ratnums(sub->runtime, 0,
+					    SNDRV_PCM_HW_PARAM_RATE,
+					    &cs4234->rate_constraint);
+	if (ret < 0)
+		return ret;
+
+	/*
+	 * MCLK/rate may be a valid ratio but out-of-spec (e.g. 24576000/64000)
+	 * so this rule limits the range of sample rate for given MCLK.
+	 */
+	return snd_pcm_hw_rule_add(sub->runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
+				   cs4234_dai_rule_rate, cs4234, -1);
+}
+
+static int cs4234_dai_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
+				   unsigned int rx_mask, int slots, int slot_width)
+{
+	struct snd_soc_component *component = dai->component;
+	struct cs4234 *cs4234 = snd_soc_component_get_drvdata(component);
+	unsigned int slot_offset, dac5_slot, dac5_mask_group;
+	uint8_t dac5_masks[4];
+
+	if (slot_width != 32) {
+		dev_err(component->dev, "Unsupported slot width\n");
+		return -EINVAL;
+	}
+
+	/* Either 4 or 5 consecutive bits, DAC5 is optional */
+	slot_offset = ffs(tx_mask) - 1;
+	tx_mask >>= slot_offset;
+	if ((slot_offset % 4) || ((tx_mask != 0x0F) && (tx_mask != 0x1F))) {
+		dev_err(component->dev, "Unsupported tx slots allocation\n");
+		return -EINVAL;
+	}
+
+	regmap_update_bits(cs4234->regmap, CS4234_SP_DATA_SEL, CS4234_DAC14_SRC_MASK,
+			   (slot_offset / 4) << CS4234_DAC14_SRC_SHIFT);
+	regmap_update_bits(cs4234->regmap, CS4234_SP_DATA_SEL, CS4234_LL_SRC_MASK,
+			   (slot_offset / 4) << CS4234_LL_SRC_SHIFT);
+
+	if (tx_mask == 0x1F) {
+		dac5_slot = slot_offset + 4;
+		memset(dac5_masks, 0xFF, sizeof(dac5_masks));
+		dac5_mask_group = dac5_slot / 8;
+		dac5_slot %= 8;
+		dac5_masks[dac5_mask_group] ^= BIT(7 - dac5_slot);
+		regmap_bulk_write(cs4234->regmap,
+				  CS4234_SDIN1_MASK1,
+				  dac5_masks,
+				  ARRAY_SIZE(dac5_masks));
+	}
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops cs4234_dai_ops = {
+	.set_fmt	= cs4234_dai_set_fmt,
+	.hw_params	= cs4234_dai_hw_params,
+	.startup	= cs4234_dai_startup,
+	.set_tdm_slot	= cs4234_dai_set_tdm_slot,
+};
+
+static struct snd_soc_dai_driver cs4234_dai[] = {
+	{
+		.name = "cs4234-dai",
+		.playback = {
+			.stream_name = "Playback",
+			.channels_min = 1,
+			.channels_max = 5,
+			.rates = CS4234_PCM_RATES,
+			.formats = CS4234_FORMATS,
+		},
+		.capture = {
+			.stream_name = "Capture",
+			.channels_min = 1,
+			.channels_max = 4,
+			.rates = CS4234_PCM_RATES,
+			.formats = CS4234_FORMATS,
+		},
+		.ops = &cs4234_dai_ops,
+		.symmetric_rates = 1,
+	},
+};
+
+static const struct reg_default cs4234_default_reg[] = {
+	{ CS4234_CLOCK_SP,	 0x04},
+	{ CS4234_SAMPLE_WIDTH,	 0xFF},
+	{ CS4234_SP_CTRL,	 0x48},
+	{ CS4234_SP_DATA_SEL,	 0x01},
+	{ CS4234_SDIN1_MASK1,	 0xFF},
+	{ CS4234_SDIN1_MASK2,	 0xFF},
+	{ CS4234_SDIN2_MASK1,	 0xFF},
+	{ CS4234_SDIN2_MASK2,	 0xFF},
+	{ CS4234_TPS_CTRL,	 0x00},
+	{ CS4234_ADC_CTRL1,	 0xC0},
+	{ CS4234_ADC_CTRL2,	 0xFF},
+	{ CS4234_LOW_LAT_CTRL1,	 0xE0},
+	{ CS4234_DAC_CTRL1,	 0xE0},
+	{ CS4234_DAC_CTRL2,	 0xE0},
+	{ CS4234_DAC_CTRL3,	 0xBF},
+	{ CS4234_DAC_CTRL4,	 0x1F},
+	{ CS4234_VOLUME_MODE,	 0x87},
+	{ CS4234_MASTER_VOL,	 0x10},
+	{ CS4234_DAC1_VOL,	 0x10},
+	{ CS4234_DAC2_VOL,	 0x10},
+	{ CS4234_DAC3_VOL,	 0x10},
+	{ CS4234_DAC4_VOL,	 0x10},
+	{ CS4234_DAC5_VOL,	 0x10},
+	{ CS4234_INT_CTRL,	 0x40},
+	{ CS4234_INT_MASK1,	 0x10},
+	{ CS4234_INT_MASK2,	 0x20},
+};
+
+static bool cs4234_readable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CS4234_DEVID_AB ... CS4234_DEVID_EF:
+	case CS4234_REVID ... CS4234_DAC5_VOL:
+	case CS4234_INT_CTRL ... CS4234_MAX_REGISTER:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool cs4234_volatile_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CS4234_INT_NOTIFY1:
+	case CS4234_INT_NOTIFY2:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool cs4234_writeable_register(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case CS4234_DEVID_AB ... CS4234_REVID:
+	case CS4234_INT_NOTIFY1 ... CS4234_INT_NOTIFY2:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static const struct snd_soc_component_driver soc_component_cs4234 = {
+	.dapm_widgets		= cs4234_dapm_widgets,
+	.num_dapm_widgets	= ARRAY_SIZE(cs4234_dapm_widgets),
+	.dapm_routes		= cs4234_dapm_routes,
+	.num_dapm_routes	= ARRAY_SIZE(cs4234_dapm_routes),
+	.controls		= cs4234_snd_controls,
+	.num_controls		= ARRAY_SIZE(cs4234_snd_controls),
+	.set_bias_level		= cs4234_set_bias_level,
+	.non_legacy_dai_naming	= 1,
+	.idle_bias_on		= 1,
+	.suspend_bias_off	= 1,
+};
+
+static const struct regmap_config cs4234_regmap = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = CS4234_MAX_REGISTER,
+	.readable_reg = cs4234_readable_register,
+	.volatile_reg = cs4234_volatile_reg,
+	.writeable_reg = cs4234_writeable_register,
+	.reg_defaults = cs4234_default_reg,
+	.num_reg_defaults = ARRAY_SIZE(cs4234_default_reg),
+	.cache_type = REGCACHE_RBTREE,
+	.use_single_read = true,
+	.use_single_write = true,
+};
+
+static const char * const cs4234_core_supplies[] = {
+	"VA",
+	"VL",
+};
+
+static void cs4234_shutdown(struct cs4234 *cs4234)
+{
+	cancel_delayed_work_sync(&cs4234->vq_ramp_delay);
+	reinit_completion(&cs4234->vq_ramp_complete);
+
+	regmap_update_bits(cs4234->regmap, CS4234_DAC_CTRL4, CS4234_VQ_RAMP_MASK,
+			   CS4234_VQ_RAMP_MASK);
+	msleep(50);
+	regcache_cache_only(cs4234->regmap, true);
+	/* Clear VQ Ramp Bit in cache for the next PowerUp */
+	regmap_update_bits(cs4234->regmap, CS4234_DAC_CTRL4, CS4234_VQ_RAMP_MASK, 0);
+	gpiod_set_value_cansleep(cs4234->reset_gpio, 0);
+	regulator_bulk_disable(cs4234->num_core_supplies, cs4234->core_supplies);
+	clk_disable_unprepare(cs4234->mclk);
+}
+
+static int cs4234_powerup(struct cs4234 *cs4234)
+{
+	int ret;
+
+	ret = clk_prepare_enable(cs4234->mclk);
+	if (ret) {
+		dev_err(cs4234->dev, "Failed to enable mclk: %d\n", ret);
+		return ret;
+	}
+
+	ret = regulator_bulk_enable(cs4234->num_core_supplies, cs4234->core_supplies);
+	if (ret) {
+		dev_err(cs4234->dev, "Failed to enable core supplies: %d\n", ret);
+		clk_disable_unprepare(cs4234->mclk);
+		return ret;
+	}
+
+	usleep_range(CS4234_HOLD_RESET_TIME_US, 2 * CS4234_HOLD_RESET_TIME_US);
+	gpiod_set_value_cansleep(cs4234->reset_gpio, 1);
+
+	/* Make sure hardware reset done 2 ms + (3000/MCLK) */
+	usleep_range(CS4234_BOOT_TIME_US, CS4234_BOOT_TIME_US * 2);
+
+	queue_delayed_work(system_power_efficient_wq,
+			   &cs4234->vq_ramp_delay,
+			   msecs_to_jiffies(CS4234_VQ_CHARGE_MS));
+
+	return 0;
+}
+
+static int cs4234_i2c_probe(struct i2c_client *i2c_client, const struct i2c_device_id *id)
+{
+	struct cs4234 *cs4234;
+	struct device *dev = &i2c_client->dev;
+	unsigned int revid;
+	uint32_t devid;
+	uint8_t ids[3];
+	int ret = 0, i;
+
+	cs4234 = devm_kzalloc(dev, sizeof(*cs4234), GFP_KERNEL);
+	if (!cs4234)
+		return -ENOMEM;
+	i2c_set_clientdata(i2c_client, cs4234);
+	cs4234->dev = dev;
+	init_completion(&cs4234->vq_ramp_complete);
+	INIT_DELAYED_WORK(&cs4234->vq_ramp_delay, cs4234_vq_ramp_done);
+
+	cs4234->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW);
+	if (IS_ERR(cs4234->reset_gpio))
+		return PTR_ERR(cs4234->reset_gpio);
+
+	BUILD_BUG_ON(ARRAY_SIZE(cs4234->core_supplies) < ARRAY_SIZE(cs4234_core_supplies));
+
+	cs4234->num_core_supplies = ARRAY_SIZE(cs4234_core_supplies);
+	for (i = 0; i < ARRAY_SIZE(cs4234_core_supplies); i++)
+		cs4234->core_supplies[i].supply = cs4234_core_supplies[i];
+
+	ret = devm_regulator_bulk_get(dev, cs4234->num_core_supplies, cs4234->core_supplies);
+	if (ret) {
+		dev_err(dev, "Failed to request core supplies %d\n", ret);
+		return ret;
+	}
+
+	cs4234->mclk = devm_clk_get(dev, "mclk");
+	if (IS_ERR(cs4234->mclk)) {
+		ret = PTR_ERR(cs4234->mclk);
+		dev_err(dev, "Failed to get the mclk: %d\n", ret);
+		return ret;
+	}
+	cs4234->mclk_rate = clk_get_rate(cs4234->mclk);
+
+	if (cs4234->mclk_rate < 7680000 || cs4234->mclk_rate > 25600000) {
+		dev_err(dev, "Invalid Master Clock rate\n");
+		return -EINVAL;
+	}
+
+	cs4234->regmap = devm_regmap_init_i2c(i2c_client, &cs4234_regmap);
+	if (IS_ERR(cs4234->regmap)) {
+		ret = PTR_ERR(cs4234->regmap);
+		dev_err(dev, "regmap_init() failed: %d\n", ret);
+		return ret;
+	}
+
+	ret = cs4234_powerup(cs4234);
+	if (ret)
+		return ret;
+
+	ret = regmap_bulk_read(cs4234->regmap, CS4234_DEVID_AB, ids, ARRAY_SIZE(ids));
+	if (ret < 0) {
+		dev_err(dev, "Failed to read DEVID: %d\n", ret);
+		goto fail_shutdown;
+	}
+
+	devid = (ids[0] << 16) | (ids[1] << 8) | ids[2];
+	if (devid != CS4234_SUPPORTED_ID) {
+		dev_err(dev, "Unknown device ID: %x\n", devid);
+		ret = -EINVAL;
+		goto fail_shutdown;
+	}
+
+	ret = regmap_read(cs4234->regmap, CS4234_REVID, &revid);
+	if (ret < 0) {
+		dev_err(dev, "Failed to read CS4234_REVID: %d\n", ret);
+		goto fail_shutdown;
+	}
+
+	dev_info(dev, "Cirrus Logic CS4234, Alpha Rev: %02X, Numeric Rev: %02X\n",
+		 (revid & 0xF0) >> 4, revid & 0x0F);
+
+	ret = regulator_get_voltage(cs4234->core_supplies[CS4234_SUPPLY_VA].consumer);
+	switch (ret) {
+	case 3135000 ... 3650000:
+		regmap_update_bits(cs4234->regmap, CS4234_ADC_CTRL1,
+				   CS4234_VA_SEL_MASK,
+				   CS4234_3V3 << CS4234_VA_SEL_SHIFT);
+		break;
+	case 4750000 ... 5250000:
+		regmap_update_bits(cs4234->regmap, CS4234_ADC_CTRL1,
+				   CS4234_VA_SEL_MASK,
+				   CS4234_5V << CS4234_VA_SEL_SHIFT);
+		break;
+	default:
+		dev_err(dev, "Invalid VA voltage\n");
+		ret = -EINVAL;
+		goto fail_shutdown;
+	}
+
+	pm_runtime_set_active(&i2c_client->dev);
+	pm_runtime_enable(&i2c_client->dev);
+
+	memcpy(&cs4234->rate_dividers, &cs4234_dividers, sizeof(cs4234_dividers));
+	cs4234->rate_constraint.rats = cs4234->rate_dividers;
+
+	ret = snd_soc_register_component(dev, &soc_component_cs4234, cs4234_dai,
+					 ARRAY_SIZE(cs4234_dai));
+	if (ret < 0) {
+		dev_err(dev, "Failed to register component:%d\n", ret);
+		pm_runtime_disable(&i2c_client->dev);
+		goto fail_shutdown;
+	}
+
+	return ret;
+
+fail_shutdown:
+	cs4234_shutdown(cs4234);
+
+	return ret;
+}
+
+static int cs4234_i2c_remove(struct i2c_client *i2c_client)
+{
+	struct cs4234 *cs4234 = i2c_get_clientdata(i2c_client);
+	struct device *dev = &i2c_client->dev;
+
+	snd_soc_unregister_component(dev);
+	pm_runtime_disable(dev);
+	cs4234_shutdown(cs4234);
+
+	return 0;
+}
+
+static int __maybe_unused cs4234_runtime_resume(struct device *dev)
+{
+	struct cs4234 *cs4234 = dev_get_drvdata(dev);
+	int ret;
+
+	ret = cs4234_powerup(cs4234);
+	if (ret)
+		return ret;
+
+	regcache_mark_dirty(cs4234->regmap);
+	regcache_cache_only(cs4234->regmap, false);
+	ret = regcache_sync(cs4234->regmap);
+	if (ret) {
+		dev_err(dev, "Failed to sync regmap: %d\n", ret);
+		cs4234_shutdown(cs4234);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int __maybe_unused cs4234_runtime_suspend(struct device *dev)
+{
+	struct cs4234 *cs4234 = dev_get_drvdata(dev);
+
+	cs4234_shutdown(cs4234);
+
+	return 0;
+}
+
+static const struct dev_pm_ops cs4234_pm = {
+	SET_RUNTIME_PM_OPS(cs4234_runtime_suspend, cs4234_runtime_resume, NULL)
+};
+
+static const struct of_device_id cs4234_of_match[] = {
+	{ .compatible = "cirrus,cs4234", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, cs4234_of_match);
+
+static struct i2c_driver cs4234_i2c_driver = {
+	.driver = {
+		.name = "cs4234",
+		.pm = &cs4234_pm,
+		.of_match_table = cs4234_of_match,
+	},
+	.probe =	cs4234_i2c_probe,
+	.remove =	cs4234_i2c_remove,
+};
+module_i2c_driver(cs4234_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC Cirrus Logic CS4234 driver");
+MODULE_AUTHOR("Lucas Tanure <[e-mail]>");
+MODULE_LICENSE("GPL v2");

sound/soc/codecs/cs4234.h

···
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * ALSA SoC Audio driver for CS4234 codec
+ *
+ * Copyright (C) 2020 Cirrus Logic, Inc. and
+ *                    Cirrus Logic International Semiconductor Ltd.
+ */
+
+#ifndef CS4234_H
+#define CS4234_H
+
+#define CS4234_DEVID_AB			0x01
+#define CS4234_DEVID_CD			0x02
+#define CS4234_DEVID_EF			0x03
+#define CS4234_REVID			0x05
+
+#define CS4234_CLOCK_SP			0x06
+#define CS4234_BASE_RATE_MASK		0xC0
+#define CS4234_BASE_RATE_SHIFT		6
+#define CS4234_SPEED_MODE_MASK		0x30
+#define CS4234_SPEED_MODE_SHIFT		4
+#define CS4234_MCLK_RATE_MASK		0x0E
+#define CS4234_MCLK_RATE_SHIFT		1
+
+#define CS4234_SAMPLE_WIDTH		0x07
+#define CS4234_SDOUTX_SW_MASK		0xC0
+#define CS4234_SDOUTX_SW_SHIFT		6
+#define CS4234_INPUT_SW_MASK		0x30
+#define CS4234_INPUT_SW_SHIFT		4
+#define CS4234_LOW_LAT_SW_MASK		0x0C
+#define CS4234_LOW_LAT_SW_SHIFT		2
+#define CS4234_DAC5_SW_MASK		0x03
+#define CS4234_DAC5_SW_SHIFT		0
+
+#define CS4234_SP_CTRL			0x08
+#define CS4234_INVT_SCLK_MASK		0x80
+#define CS4234_INVT_SCLK_SHIFT		7
+#define CS4234_DAC5_SRC_MASK		0x70
+#define CS4234_DAC5_SRC_SHIFT		4
+#define CS4234_SP_FORMAT_MASK		0x0C
+#define CS4234_SP_FORMAT_SHIFT		2
+#define CS4234_SDO_CHAIN_MASK		0x02
+#define CS4234_SDO_CHAIN_SHIFT		1
+#define CS4234_MST_SLV_MASK		0x01
+#define CS4234_MST_SLV_SHIFT		0
+
+#define CS4234_SP_DATA_SEL		0x09
+#define CS4234_DAC14_SRC_MASK		0x38
+#define CS4234_DAC14_SRC_SHIFT		3
+#define CS4234_LL_SRC_MASK		0x07
+#define CS4234_LL_SRC_SHIFT		0
+
+#define CS4234_SDIN1_MASK1		0x0A
+#define CS4234_SDIN1_MASK2		0x0B
+#define CS4234_SDIN2_MASK1		0x0C
+#define CS4234_SDIN2_MASK2		0x0D
+
+#define CS4234_TPS_CTRL			0x0E
+#define CS4234_TPS_MODE_MASK		0x80
+#define CS4234_TPS_MODE_SHIFT		7
+#define CS4234_TPS_OFST_MASK		0x70
+#define CS4234_TPS_OFST_SHIFT		4
+#define CS4234_GRP_DELAY_MASK		0x0F
+#define CS4234_GRP_DELAY_SHIFT		0
+
+#define CS4234_ADC_CTRL1		0x0F
+#define CS4234_VA_SEL_MASK		0x20
+#define CS4234_VA_SEL_SHIFT		5
+#define CS4234_ENA_HPF_MASK		0x10
+#define CS4234_ENA_HPF_SHIFT		4
+#define CS4234_INV_ADC_MASK		0x0F
+#define CS4234_INV_ADC4_MASK		0x08
+#define CS4234_INV_ADC4_SHIFT		3
+#define CS4234_INV_ADC3_MASK		0x04
+#define CS4234_INV_ADC3_SHIFT		2
+#define CS4234_INV_ADC2_MASK		0x02
+#define CS4234_INV_ADC2_SHIFT		1
+#define CS4234_INV_ADC1_MASK		0x01
+#define CS4234_INV_ADC1_SHIFT		0
+
+#define CS4234_ADC_CTRL2		0x10
+#define CS4234_MUTE_ADC4_MASK		0x80
+#define CS4234_MUTE_ADC4_SHIFT		7
+#define CS4234_MUTE_ADC3_MASK		0x40
+#define CS4234_MUTE_ADC3_SHIFT		6
+#define CS4234_MUTE_ADC2_MASK		0x20
+#define CS4234_MUTE_ADC2_SHIFT		5
+#define CS4234_MUTE_ADC1_MASK		0x10
+#define CS4234_MUTE_ADC1_SHIFT		4
+#define CS4234_PDN_ADC4_MASK		0x08
+#define CS4234_PDN_ADC4_SHIFT		3
+#define CS4234_PDN_ADC3_MASK		0x04
+#define CS4234_PDN_ADC3_SHIFT		2
+#define CS4234_PDN_ADC2_MASK		0x02
+#define CS4234_PDN_ADC2_SHIFT		1
+#define CS4234_PDN_ADC1_MASK		0x01
+#define CS4234_PDN_ADC1_SHIFT		0
+
+#define CS4234_LOW_LAT_CTRL1		0x11
+#define CS4234_LL_NG_MASK		0xE0
+#define CS4234_LL_NG_SHIFT		5
+#define CS4234_INV_LL_MASK		0x0F
+#define CS4234_INV_LL4_MASK		0x08
+#define CS4234_INV_LL4_SHIFT		3
+#define CS4234_INV_LL3_MASK		0x04
+#define CS4234_INV_LL3_SHIFT		2
+#define CS4234_INV_LL2_MASK		0x02
+#define CS4234_INV_LL2_SHIFT		1
+#define CS4234_INV_LL1_MASK		0x01
+#define CS4234_INV_LL1_SHIFT		0
+
+#define CS4234_DAC_CTRL1		0x12
+#define CS4234_DAC14_NG_MASK		0xE0
+#define CS4234_DAC14_NG_SHIFT		5
+#define CS4234_DAC14_DE_MASK		0x10
+#define CS4234_DAC14_DE_SHIFT		4
+#define CS4234_DAC5_DE_MASK		0x08
+#define CS4234_DAC5_DE_SHIFT		3
+#define CS4234_DAC5_MVC_MASK		0x04
+#define CS4234_DAC5_MVC_SHIFT		2
+#define CS4234_DAC5_CFG_FLTR_MASK	0x03
+#define CS4234_DAC5_CFG_FLTR_SHIFT	0
+
+#define CS4234_DAC_CTRL2		0x13
+#define CS4234_DAC5_NG_MASK		0xE0
+#define CS4234_DAC5_NG_SHIFT		5
+#define CS4234_INV_DAC_MASK		0x1F
+#define CS4234_INV_DAC5_MASK		0x10
+#define CS4234_INV_DAC5_SHIFT		4
+#define CS4234_INV_DAC4_MASK		0x08
+#define CS4234_INV_DAC4_SHIFT		3
+#define CS4234_INV_DAC3_MASK		0x04
+#define CS4234_INV_DAC3_SHIFT		2
+#define CS4234_INV_DAC2_MASK		0x02
+#define CS4234_INV_DAC2_SHIFT		1
+#define CS4234_INV_DAC1_MASK		0x01
+#define CS4234_INV_DAC1_SHIFT		0
+
+#define CS4234_DAC_CTRL3		0x14
+#define CS4234_DAC5_ATT_MASK		0x80
+#define CS4234_DAC5_ATT_SHIFT		7
+#define CS4234_DAC14_ATT_MASK		0x40
+#define CS4234_DAC14_ATT_SHIFT		6
+#define CS4234_MUTE_LL_MASK		0x20
+#define CS4234_MUTE_LL_SHIFT		5
+#define CS4234_MUTE_DAC5_MASK		0x10
+#define CS4234_MUTE_DAC5_SHIFT		4
+#define CS4234_MUTE_DAC4_MASK		0x08
+#define CS4234_MUTE_DAC4_SHIFT		3
+#define CS4234_MUTE_DAC3_MASK		0x04
+#define CS4234_MUTE_DAC3_SHIFT		2
+#define CS4234_MUTE_DAC2_MASK		0x02
+#define CS4234_MUTE_DAC2_SHIFT		1
+#define CS4234_MUTE_DAC1_MASK		0x01
+#define CS4234_MUTE_DAC1_SHIFT		0
+
+#define CS4234_DAC_CTRL4		0x15
+#define CS4234_VQ_RAMP_MASK		0x80
+#define CS4234_VQ_RAMP_SHIFT		7
+#define CS4234_TPS_GAIN_MASK		0x40
+#define CS4234_TPS_GAIN_SHIFT		6
+#define CS4234_PDN_DAC5_MASK		0x10
+#define CS4234_PDN_DAC5_SHIFT		4
+#define CS4234_PDN_DAC4_MASK		0x08
+#define CS4234_PDN_DAC4_SHIFT		3
+#define CS4234_PDN_DAC3_MASK		0x04
+#define CS4234_PDN_DAC3_SHIFT		2
+#define CS4234_PDN_DAC2_MASK		0x02
+#define CS4234_PDN_DAC2_SHIFT		1
+#define CS4234_PDN_DAC1_MASK		0x01
+#define CS4234_PDN_DAC1_SHIFT		0
+
+#define CS4234_VOLUME_MODE		0x16
+#define CS4234_MUTE_DELAY_MASK		0xC0
+#define CS4234_MUTE_DELAY_SHIFT		6
+#define CS4234_MIN_DELAY_MASK		0x38
+#define CS4234_MIN_DELAY_SHIFT		3
+#define CS4234_MAX_DELAY_MASK		0x07
+#define CS4234_MAX_DELAY_SHIFT		0
+
+#define CS4234_MASTER_VOL		0x17
+#define CS4234_DAC1_VOL			0x18
+#define CS4234_DAC2_VOL			0x19
+#define CS4234_DAC3_VOL			0x1A
+#define CS4234_DAC4_VOL			0x1B
+#define CS4234_DAC5_VOL			0x1C
+
+#define CS4234_INT_CTRL			0x1E
+#define CS4234_INT_MODE_MASK		0x80
+#define CS4234_INT_MODE_SHIFT		7
+#define CS4234_INT_PIN_MASK		0x60
+#define CS4234_INT_PIN_SHIFT		5
+
+#define CS4234_INT_MASK1		0x1F
+#define CS4234_MSK_TST_MODE_MASK	0x80
+#define CS4234_MSK_TST_MODE_ERR_SHIFT	7
+#define CS4234_MSK_SP_ERR_MASK		0x40
+#define CS4234_MSK_SP_ERR_SHIFT		6
+#define CS4234_MSK_CLK_ERR_MASK		0x08
+#define CS4234_MSK_CLK_ERR_SHIFT	5
+#define CS4234_MSK_ADC4_OVFL_MASK	0x08
+#define CS4234_MSK_ADC4_OVFL_SHIFT	3
+#define CS4234_MSK_ADC3_OVFL_MASK	0x04
+#define CS4234_MSK_ADC3_OVFL_SHIFT	2
+#define CS4234_MSK_ADC2_OVFL_MASK	0x02
+#define CS4234_MSK_ADC2_OVFL_SHIFT	1
+#define CS4234_MSK_ADC1_OVFL_MASK	0x01
+#define CS4234_MSK_ADC1_OVFL_SHIFT	0
+
+#define CS4234_INT_MASK2		0x20
+#define CS4234_MSK_DAC5_CLIP_MASK	0x10
+#define CS4234_MSK_DAC5_CLIP_SHIFT	4
+#define CS4234_MSK_DAC4_CLIP_MASK	0x08
+#define CS4234_MSK_DAC4_CLIP_SHIFT	3
+#define CS4234_MSK_DAC3_CLIP_MASK	0x04
+#define CS4234_MSK_DAC3_CLIP_SHIFT	2
+#define CS4234_MSK_DAC2_CLIP_MASK	0x02
+#define CS4234_MSK_DAC2_CLIP_SHIFT	1
+#define CS4234_MSK_DAC1_CLIP_MASK	0x01
+#define CS4234_MSK_DAC1_CLIP_SHIFT	0
+
+#define CS4234_INT_NOTIFY1		0x21
+#define CS4234_TST_MODE_MASK		0x80
+#define CS4234_TST_MODE_SHIFT		7
+#define CS4234_SP_ERR_MASK		0x40
+#define CS4234_SP_ERR_SHIFT		6
+#define CS4234_CLK_MOD_ERR_MASK		0x08
+#define CS4234_CLK_MOD_ERR_SHIFT	5
+#define CS4234_ADC4_OVFL_MASK		0x08
+#define CS4234_ADC4_OVFL_SHIFT		3
+#define CS4234_ADC3_OVFL_MASK		0x04
+#define CS4234_ADC3_OVFL_SHIFT		2
+#define CS4234_ADC2_OVFL_MASK		0x02
+#define CS4234_ADC2_OVFL_SHIFT		1
+#define CS4234_ADC1_OVFL_MASK		0x01
+#define CS4234_ADC1_OVFL_SHIFT		0
+
+#define CS4234_INT_NOTIFY2		0x22
+#define CS4234_DAC5_CLIP_MASK		0x10
+#define CS4234_DAC5_CLIP_SHIFT		4
+#define CS4234_DAC4_CLIP_MASK		0x08
+#define CS4234_DAC4_CLIP_SHIFT		3
+#define CS4234_DAC3_CLIP_MASK		0x04
+#define CS4234_DAC3_CLIP_SHIFT		2
+#define CS4234_DAC2_CLIP_MASK		0x02
+#define CS4234_DAC2_CLIP_SHIFT		1
+#define CS4234_DAC1_CLIP_MASK		0x01
+#define CS4234_DAC1_CLIP_SHIFT		0
+
+#define CS4234_MAX_REGISTER		CS4234_INT_NOTIFY2
+
+#define CS4234_SUPPORTED_ID		0x423400
+#define CS4234_BOOT_TIME_US		3000
+#define CS4234_HOLD_RESET_TIME_US	1000
+#define CS4234_VQ_CHARGE_MS		1000
+
+#define CS4234_PCM_RATES	(SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+				 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
+				 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000)
+
+#define CS4234_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE | \
+			SNDRV_PCM_FMTBIT_S20_LE | SNDRV_PCM_FMTBIT_S24_LE | \
+			SNDRV_PCM_FMTBIT_S24_3LE)
+
+enum cs4234_supplies {
+	CS4234_SUPPLY_VA = 0,
+	CS4234_SUPPLY_VL,
+};
+
+enum cs4234_va_sel {
+	CS4234_3V3 = 0,
+	CS4234_5V,
+};
+
+enum cs4234_sp_format {
+	CS4234_LEFT_J = 0,
+	CS4234_I2S,
+	CS4234_TDM,
+};
+
+enum cs4234_base_rate_advisory {
+	CS4234_48K = 0,
+	CS4234_44K1,
+	CS4234_32K,
+};
+
+#endif