root/sound/soc/codecs/cs53l30.c
// SPDX-License-Identifier: GPL-2.0-only
/*
 * cs53l30.c  --  CS53l30 ALSA Soc Audio driver
 *
 * Copyright 2015 Cirrus Logic, Inc.
 *
 * Authors: Paul Handrigan <Paul.Handrigan@cirrus.com>,
 *          Tim Howe <Tim.Howe@cirrus.com>
 */

#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/regulator/consumer.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>

#include "cs53l30.h"
#include "cirrus_legacy.h"

#define CS53L30_NUM_SUPPLIES 2
static const char *const cs53l30_supply_names[CS53L30_NUM_SUPPLIES] = {
        "VA",
        "VP",
};

struct cs53l30_private {
        struct regulator_bulk_data      supplies[CS53L30_NUM_SUPPLIES];
        struct regmap                   *regmap;
        struct gpio_desc                *reset_gpio;
        struct gpio_desc                *mute_gpio;
        struct clk                      *mclk;
        bool                            use_sdout2;
        u32                             mclk_rate;
};

static const struct reg_default cs53l30_reg_defaults[] = {
        { CS53L30_PWRCTL,               CS53L30_PWRCTL_DEFAULT },
        { CS53L30_MCLKCTL,              CS53L30_MCLKCTL_DEFAULT },
        { CS53L30_INT_SR_CTL,           CS53L30_INT_SR_CTL_DEFAULT },
        { CS53L30_MICBIAS_CTL,          CS53L30_MICBIAS_CTL_DEFAULT },
        { CS53L30_ASPCFG_CTL,           CS53L30_ASPCFG_CTL_DEFAULT },
        { CS53L30_ASP_CTL1,             CS53L30_ASP_CTL1_DEFAULT },
        { CS53L30_ASP_TDMTX_CTL1,       CS53L30_ASP_TDMTX_CTLx_DEFAULT },
        { CS53L30_ASP_TDMTX_CTL2,       CS53L30_ASP_TDMTX_CTLx_DEFAULT },
        { CS53L30_ASP_TDMTX_CTL3,       CS53L30_ASP_TDMTX_CTLx_DEFAULT },
        { CS53L30_ASP_TDMTX_CTL4,       CS53L30_ASP_TDMTX_CTLx_DEFAULT },
        { CS53L30_ASP_TDMTX_EN1,        CS53L30_ASP_TDMTX_ENx_DEFAULT },
        { CS53L30_ASP_TDMTX_EN2,        CS53L30_ASP_TDMTX_ENx_DEFAULT },
        { CS53L30_ASP_TDMTX_EN3,        CS53L30_ASP_TDMTX_ENx_DEFAULT },
        { CS53L30_ASP_TDMTX_EN4,        CS53L30_ASP_TDMTX_ENx_DEFAULT },
        { CS53L30_ASP_TDMTX_EN5,        CS53L30_ASP_TDMTX_ENx_DEFAULT },
        { CS53L30_ASP_TDMTX_EN6,        CS53L30_ASP_TDMTX_ENx_DEFAULT },
        { CS53L30_ASP_CTL2,             CS53L30_ASP_CTL2_DEFAULT },
        { CS53L30_SFT_RAMP,             CS53L30_SFT_RMP_DEFAULT },
        { CS53L30_LRCK_CTL1,            CS53L30_LRCK_CTLx_DEFAULT },
        { CS53L30_LRCK_CTL2,            CS53L30_LRCK_CTLx_DEFAULT },
        { CS53L30_MUTEP_CTL1,           CS53L30_MUTEP_CTL1_DEFAULT },
        { CS53L30_MUTEP_CTL2,           CS53L30_MUTEP_CTL2_DEFAULT },
        { CS53L30_INBIAS_CTL1,          CS53L30_INBIAS_CTL1_DEFAULT },
        { CS53L30_INBIAS_CTL2,          CS53L30_INBIAS_CTL2_DEFAULT },
        { CS53L30_DMIC1_STR_CTL,        CS53L30_DMIC1_STR_CTL_DEFAULT },
        { CS53L30_DMIC2_STR_CTL,        CS53L30_DMIC2_STR_CTL_DEFAULT },
        { CS53L30_ADCDMIC1_CTL1,        CS53L30_ADCDMICx_CTL1_DEFAULT },
        { CS53L30_ADCDMIC1_CTL2,        CS53L30_ADCDMIC1_CTL2_DEFAULT },
        { CS53L30_ADC1_CTL3,            CS53L30_ADCx_CTL3_DEFAULT },
        { CS53L30_ADC1_NG_CTL,          CS53L30_ADCx_NG_CTL_DEFAULT },
        { CS53L30_ADC1A_AFE_CTL,        CS53L30_ADCxy_AFE_CTL_DEFAULT },
        { CS53L30_ADC1B_AFE_CTL,        CS53L30_ADCxy_AFE_CTL_DEFAULT },
        { CS53L30_ADC1A_DIG_VOL,        CS53L30_ADCxy_DIG_VOL_DEFAULT },
        { CS53L30_ADC1B_DIG_VOL,        CS53L30_ADCxy_DIG_VOL_DEFAULT },
        { CS53L30_ADCDMIC2_CTL1,        CS53L30_ADCDMICx_CTL1_DEFAULT },
        { CS53L30_ADCDMIC2_CTL2,        CS53L30_ADCDMIC1_CTL2_DEFAULT },
        { CS53L30_ADC2_CTL3,            CS53L30_ADCx_CTL3_DEFAULT },
        { CS53L30_ADC2_NG_CTL,          CS53L30_ADCx_NG_CTL_DEFAULT },
        { CS53L30_ADC2A_AFE_CTL,        CS53L30_ADCxy_AFE_CTL_DEFAULT },
        { CS53L30_ADC2B_AFE_CTL,        CS53L30_ADCxy_AFE_CTL_DEFAULT },
        { CS53L30_ADC2A_DIG_VOL,        CS53L30_ADCxy_DIG_VOL_DEFAULT },
        { CS53L30_ADC2B_DIG_VOL,        CS53L30_ADCxy_DIG_VOL_DEFAULT },
        { CS53L30_INT_MASK,             CS53L30_DEVICE_INT_MASK },
};

static bool cs53l30_volatile_register(struct device *dev, unsigned int reg)
{
        if (reg == CS53L30_IS)
                return true;
        else
                return false;
}

static bool cs53l30_writeable_register(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case CS53L30_DEVID_AB:
        case CS53L30_DEVID_CD:
        case CS53L30_DEVID_E:
        case CS53L30_REVID:
        case CS53L30_IS:
                return false;
        default:
                return true;
        }
}

static bool cs53l30_readable_register(struct device *dev, unsigned int reg)
{
        switch (reg) {
        case CS53L30_DEVID_AB:
        case CS53L30_DEVID_CD:
        case CS53L30_DEVID_E:
        case CS53L30_REVID:
        case CS53L30_PWRCTL:
        case CS53L30_MCLKCTL:
        case CS53L30_INT_SR_CTL:
        case CS53L30_MICBIAS_CTL:
        case CS53L30_ASPCFG_CTL:
        case CS53L30_ASP_CTL1:
        case CS53L30_ASP_TDMTX_CTL1:
        case CS53L30_ASP_TDMTX_CTL2:
        case CS53L30_ASP_TDMTX_CTL3:
        case CS53L30_ASP_TDMTX_CTL4:
        case CS53L30_ASP_TDMTX_EN1:
        case CS53L30_ASP_TDMTX_EN2:
        case CS53L30_ASP_TDMTX_EN3:
        case CS53L30_ASP_TDMTX_EN4:
        case CS53L30_ASP_TDMTX_EN5:
        case CS53L30_ASP_TDMTX_EN6:
        case CS53L30_ASP_CTL2:
        case CS53L30_SFT_RAMP:
        case CS53L30_LRCK_CTL1:
        case CS53L30_LRCK_CTL2:
        case CS53L30_MUTEP_CTL1:
        case CS53L30_MUTEP_CTL2:
        case CS53L30_INBIAS_CTL1:
        case CS53L30_INBIAS_CTL2:
        case CS53L30_DMIC1_STR_CTL:
        case CS53L30_DMIC2_STR_CTL:
        case CS53L30_ADCDMIC1_CTL1:
        case CS53L30_ADCDMIC1_CTL2:
        case CS53L30_ADC1_CTL3:
        case CS53L30_ADC1_NG_CTL:
        case CS53L30_ADC1A_AFE_CTL:
        case CS53L30_ADC1B_AFE_CTL:
        case CS53L30_ADC1A_DIG_VOL:
        case CS53L30_ADC1B_DIG_VOL:
        case CS53L30_ADCDMIC2_CTL1:
        case CS53L30_ADCDMIC2_CTL2:
        case CS53L30_ADC2_CTL3:
        case CS53L30_ADC2_NG_CTL:
        case CS53L30_ADC2A_AFE_CTL:
        case CS53L30_ADC2B_AFE_CTL:
        case CS53L30_ADC2A_DIG_VOL:
        case CS53L30_ADC2B_DIG_VOL:
        case CS53L30_INT_MASK:
                return true;
        default:
                return false;
        }
}

static DECLARE_TLV_DB_SCALE(adc_boost_tlv, 0, 2000, 0);
static DECLARE_TLV_DB_SCALE(adc_ng_boost_tlv, 0, 3000, 0);
static DECLARE_TLV_DB_SCALE(pga_tlv, -600, 50, 0);
static DECLARE_TLV_DB_SCALE(dig_tlv, -9600, 100, 1);
static DECLARE_TLV_DB_SCALE(pga_preamp_tlv, 0, 10000, 0);

static const char * const input1_sel_text[] = {
        "DMIC1 On AB In",
        "DMIC1 On A In",
        "DMIC1 On B In",
        "ADC1 On AB In",
        "ADC1 On A In",
        "ADC1 On B In",
        "DMIC1 Off ADC1 Off",
};

static unsigned int const input1_sel_values[] = {
        CS53L30_CH_TYPE,
        CS53L30_ADCxB_PDN | CS53L30_CH_TYPE,
        CS53L30_ADCxA_PDN | CS53L30_CH_TYPE,
        CS53L30_DMICx_PDN,
        CS53L30_ADCxB_PDN | CS53L30_DMICx_PDN,
        CS53L30_ADCxA_PDN | CS53L30_DMICx_PDN,
        CS53L30_ADCxA_PDN | CS53L30_ADCxB_PDN | CS53L30_DMICx_PDN,
};

static const char * const input2_sel_text[] = {
        "DMIC2 On AB In",
        "DMIC2 On A In",
        "DMIC2 On B In",
        "ADC2 On AB In",
        "ADC2 On A In",
        "ADC2 On B In",
        "DMIC2 Off ADC2 Off",
};

static unsigned int const input2_sel_values[] = {
        0x0,
        CS53L30_ADCxB_PDN,
        CS53L30_ADCxA_PDN,
        CS53L30_DMICx_PDN,
        CS53L30_ADCxB_PDN | CS53L30_DMICx_PDN,
        CS53L30_ADCxA_PDN | CS53L30_DMICx_PDN,
        CS53L30_ADCxA_PDN | CS53L30_ADCxB_PDN | CS53L30_DMICx_PDN,
};

static const char * const input1_route_sel_text[] = {
        "ADC1_SEL", "DMIC1_SEL",
};

static const struct soc_enum input1_route_sel_enum =
        SOC_ENUM_SINGLE(CS53L30_ADCDMIC1_CTL1, CS53L30_CH_TYPE_SHIFT,
                        ARRAY_SIZE(input1_route_sel_text),
                        input1_route_sel_text);

static SOC_VALUE_ENUM_SINGLE_DECL(input1_sel_enum, CS53L30_ADCDMIC1_CTL1, 0,
                                  CS53L30_ADCDMICx_PDN_MASK, input1_sel_text,
                                  input1_sel_values);

static const struct snd_kcontrol_new input1_route_sel_mux =
        SOC_DAPM_ENUM("Input 1 Route", input1_route_sel_enum);

static const char * const input2_route_sel_text[] = {
        "ADC2_SEL", "DMIC2_SEL",
};

/* Note: CS53L30_ADCDMIC1_CTL1 CH_TYPE controls inputs 1 and 2 */
static const struct soc_enum input2_route_sel_enum =
        SOC_ENUM_SINGLE(CS53L30_ADCDMIC1_CTL1, 0,
                        ARRAY_SIZE(input2_route_sel_text),
                        input2_route_sel_text);

static SOC_VALUE_ENUM_SINGLE_DECL(input2_sel_enum, CS53L30_ADCDMIC2_CTL1, 0,
                                  CS53L30_ADCDMICx_PDN_MASK, input2_sel_text,
                                  input2_sel_values);

static const struct snd_kcontrol_new input2_route_sel_mux =
        SOC_DAPM_ENUM("Input 2 Route", input2_route_sel_enum);

/*
 * TB = 6144*(MCLK(int) scaling factor)/MCLK(internal)
 * TB - Time base
 * NOTE: If MCLK_INT_SCALE = 0, then TB=1
 */
static const char * const cs53l30_ng_delay_text[] = {
        "TB*50ms", "TB*100ms", "TB*150ms", "TB*200ms",
};

static const struct soc_enum adc1_ng_delay_enum =
        SOC_ENUM_SINGLE(CS53L30_ADC1_NG_CTL, CS53L30_ADCx_NG_DELAY_SHIFT,
                        ARRAY_SIZE(cs53l30_ng_delay_text),
                        cs53l30_ng_delay_text);

static const struct soc_enum adc2_ng_delay_enum =
        SOC_ENUM_SINGLE(CS53L30_ADC2_NG_CTL, CS53L30_ADCx_NG_DELAY_SHIFT,
                        ARRAY_SIZE(cs53l30_ng_delay_text),
                        cs53l30_ng_delay_text);

/* The noise gate threshold selected will depend on NG Boost */
static const char * const cs53l30_ng_thres_text[] = {
        "-64dB/-34dB", "-66dB/-36dB", "-70dB/-40dB", "-73dB/-43dB",
        "-76dB/-46dB", "-82dB/-52dB", "-58dB", "-64dB",
};

static const struct soc_enum adc1_ng_thres_enum =
        SOC_ENUM_SINGLE(CS53L30_ADC1_NG_CTL, CS53L30_ADCx_NG_THRESH_SHIFT,
                        ARRAY_SIZE(cs53l30_ng_thres_text),
                        cs53l30_ng_thres_text);

static const struct soc_enum adc2_ng_thres_enum =
        SOC_ENUM_SINGLE(CS53L30_ADC2_NG_CTL, CS53L30_ADCx_NG_THRESH_SHIFT,
                        ARRAY_SIZE(cs53l30_ng_thres_text),
                        cs53l30_ng_thres_text);

/* Corner frequencies are with an Fs of 48kHz. */
static const char * const hpf_corner_freq_text[] = {
        "1.86Hz", "120Hz", "235Hz", "466Hz",
};

static const struct soc_enum adc1_hpf_enum =
        SOC_ENUM_SINGLE(CS53L30_ADC1_CTL3, CS53L30_ADCx_HPF_CF_SHIFT,
                        ARRAY_SIZE(hpf_corner_freq_text), hpf_corner_freq_text);

static const struct soc_enum adc2_hpf_enum =
        SOC_ENUM_SINGLE(CS53L30_ADC2_CTL3, CS53L30_ADCx_HPF_CF_SHIFT,
                        ARRAY_SIZE(hpf_corner_freq_text), hpf_corner_freq_text);

static const struct snd_kcontrol_new cs53l30_snd_controls[] = {
        SOC_SINGLE("Digital Soft-Ramp Switch", CS53L30_SFT_RAMP,
                   CS53L30_DIGSFT_SHIFT, 1, 0),
        SOC_SINGLE("ADC1 Noise Gate Ganging Switch", CS53L30_ADC1_CTL3,
                   CS53L30_ADCx_NG_ALL_SHIFT, 1, 0),
        SOC_SINGLE("ADC2 Noise Gate Ganging Switch", CS53L30_ADC2_CTL3,
                   CS53L30_ADCx_NG_ALL_SHIFT, 1, 0),
        SOC_SINGLE("ADC1A Noise Gate Enable Switch", CS53L30_ADC1_NG_CTL,
                   CS53L30_ADCxA_NG_SHIFT, 1, 0),
        SOC_SINGLE("ADC1B Noise Gate Enable Switch", CS53L30_ADC1_NG_CTL,
                   CS53L30_ADCxB_NG_SHIFT, 1, 0),
        SOC_SINGLE("ADC2A Noise Gate Enable Switch", CS53L30_ADC2_NG_CTL,
                   CS53L30_ADCxA_NG_SHIFT, 1, 0),
        SOC_SINGLE("ADC2B Noise Gate Enable Switch", CS53L30_ADC2_NG_CTL,
                   CS53L30_ADCxB_NG_SHIFT, 1, 0),
        SOC_SINGLE("ADC1 Notch Filter Switch", CS53L30_ADCDMIC1_CTL2,
                   CS53L30_ADCx_NOTCH_DIS_SHIFT, 1, 1),
        SOC_SINGLE("ADC2 Notch Filter Switch", CS53L30_ADCDMIC2_CTL2,
                   CS53L30_ADCx_NOTCH_DIS_SHIFT, 1, 1),
        SOC_SINGLE("ADC1A Invert Switch", CS53L30_ADCDMIC1_CTL2,
                   CS53L30_ADCxA_INV_SHIFT, 1, 0),
        SOC_SINGLE("ADC1B Invert Switch", CS53L30_ADCDMIC1_CTL2,
                   CS53L30_ADCxB_INV_SHIFT, 1, 0),
        SOC_SINGLE("ADC2A Invert Switch", CS53L30_ADCDMIC2_CTL2,
                   CS53L30_ADCxA_INV_SHIFT, 1, 0),
        SOC_SINGLE("ADC2B Invert Switch", CS53L30_ADCDMIC2_CTL2,
                   CS53L30_ADCxB_INV_SHIFT, 1, 0),

        SOC_SINGLE_TLV("ADC1A Digital Boost Volume", CS53L30_ADCDMIC1_CTL2,
                       CS53L30_ADCxA_DIG_BOOST_SHIFT, 1, 0, adc_boost_tlv),
        SOC_SINGLE_TLV("ADC1B Digital Boost Volume", CS53L30_ADCDMIC1_CTL2,
                       CS53L30_ADCxB_DIG_BOOST_SHIFT, 1, 0, adc_boost_tlv),
        SOC_SINGLE_TLV("ADC2A Digital Boost Volume", CS53L30_ADCDMIC2_CTL2,
                       CS53L30_ADCxA_DIG_BOOST_SHIFT, 1, 0, adc_boost_tlv),
        SOC_SINGLE_TLV("ADC2B Digital Boost Volume", CS53L30_ADCDMIC2_CTL2,
                       CS53L30_ADCxB_DIG_BOOST_SHIFT, 1, 0, adc_boost_tlv),
        SOC_SINGLE_TLV("ADC1 NG Boost Volume", CS53L30_ADC1_NG_CTL,
                       CS53L30_ADCx_NG_BOOST_SHIFT, 1, 0, adc_ng_boost_tlv),
        SOC_SINGLE_TLV("ADC2 NG Boost Volume", CS53L30_ADC2_NG_CTL,
                       CS53L30_ADCx_NG_BOOST_SHIFT, 1, 0, adc_ng_boost_tlv),

        SOC_DOUBLE_R_TLV("ADC1 Preamplifier Volume", CS53L30_ADC1A_AFE_CTL,
                         CS53L30_ADC1B_AFE_CTL, CS53L30_ADCxy_PREAMP_SHIFT,
                         2, 0, pga_preamp_tlv),
        SOC_DOUBLE_R_TLV("ADC2 Preamplifier Volume", CS53L30_ADC2A_AFE_CTL,
                         CS53L30_ADC2B_AFE_CTL, CS53L30_ADCxy_PREAMP_SHIFT,
                         2, 0, pga_preamp_tlv),

        SOC_ENUM("Input 1 Channel Select", input1_sel_enum),
        SOC_ENUM("Input 2 Channel Select", input2_sel_enum),

        SOC_ENUM("ADC1 HPF Select", adc1_hpf_enum),
        SOC_ENUM("ADC2 HPF Select", adc2_hpf_enum),
        SOC_ENUM("ADC1 NG Threshold", adc1_ng_thres_enum),
        SOC_ENUM("ADC2 NG Threshold", adc2_ng_thres_enum),
        SOC_ENUM("ADC1 NG Delay", adc1_ng_delay_enum),
        SOC_ENUM("ADC2 NG Delay", adc2_ng_delay_enum),

        SOC_SINGLE_SX_TLV("ADC1A PGA Volume",
                    CS53L30_ADC1A_AFE_CTL, 0, 0x34, 0x24, pga_tlv),
        SOC_SINGLE_SX_TLV("ADC1B PGA Volume",
                    CS53L30_ADC1B_AFE_CTL, 0, 0x34, 0x24, pga_tlv),
        SOC_SINGLE_SX_TLV("ADC2A PGA Volume",
                    CS53L30_ADC2A_AFE_CTL, 0, 0x34, 0x24, pga_tlv),
        SOC_SINGLE_SX_TLV("ADC2B PGA Volume",
                    CS53L30_ADC2B_AFE_CTL, 0, 0x34, 0x24, pga_tlv),

        SOC_SINGLE_SX_TLV("ADC1A Digital Volume",
                    CS53L30_ADC1A_DIG_VOL, 0, 0xA0, 0x6C, dig_tlv),
        SOC_SINGLE_SX_TLV("ADC1B Digital Volume",
                    CS53L30_ADC1B_DIG_VOL, 0, 0xA0, 0x6C, dig_tlv),
        SOC_SINGLE_SX_TLV("ADC2A Digital Volume",
                    CS53L30_ADC2A_DIG_VOL, 0, 0xA0, 0x6C, dig_tlv),
        SOC_SINGLE_SX_TLV("ADC2B Digital Volume",
                    CS53L30_ADC2B_DIG_VOL, 0, 0xA0, 0x6C, dig_tlv),
};

static const struct snd_soc_dapm_widget cs53l30_dapm_widgets[] = {
        SND_SOC_DAPM_INPUT("IN1_DMIC1"),
        SND_SOC_DAPM_INPUT("IN2"),
        SND_SOC_DAPM_INPUT("IN3_DMIC2"),
        SND_SOC_DAPM_INPUT("IN4"),
        SND_SOC_DAPM_SUPPLY("MIC1 Bias", CS53L30_MICBIAS_CTL,
                            CS53L30_MIC1_BIAS_PDN_SHIFT, 1, NULL, 0),
        SND_SOC_DAPM_SUPPLY("MIC2 Bias", CS53L30_MICBIAS_CTL,
                            CS53L30_MIC2_BIAS_PDN_SHIFT, 1, NULL, 0),
        SND_SOC_DAPM_SUPPLY("MIC3 Bias", CS53L30_MICBIAS_CTL,
                            CS53L30_MIC3_BIAS_PDN_SHIFT, 1, NULL, 0),
        SND_SOC_DAPM_SUPPLY("MIC4 Bias", CS53L30_MICBIAS_CTL,
                            CS53L30_MIC4_BIAS_PDN_SHIFT, 1, NULL, 0),

        SND_SOC_DAPM_AIF_OUT("ASP_SDOUT1", NULL, 0, CS53L30_ASP_CTL1,
                             CS53L30_ASP_SDOUTx_PDN_SHIFT, 1),
        SND_SOC_DAPM_AIF_OUT("ASP_SDOUT2", NULL, 0, CS53L30_ASP_CTL2,
                             CS53L30_ASP_SDOUTx_PDN_SHIFT, 1),

        SND_SOC_DAPM_MUX("Input Mux 1", SND_SOC_NOPM, 0, 0,
                         &input1_route_sel_mux),
        SND_SOC_DAPM_MUX("Input Mux 2", SND_SOC_NOPM, 0, 0,
                         &input2_route_sel_mux),

        SND_SOC_DAPM_ADC("ADC1A", NULL, CS53L30_ADCDMIC1_CTL1,
                         CS53L30_ADCxA_PDN_SHIFT, 1),
        SND_SOC_DAPM_ADC("ADC1B", NULL, CS53L30_ADCDMIC1_CTL1,
                         CS53L30_ADCxB_PDN_SHIFT, 1),
        SND_SOC_DAPM_ADC("ADC2A", NULL, CS53L30_ADCDMIC2_CTL1,
                         CS53L30_ADCxA_PDN_SHIFT, 1),
        SND_SOC_DAPM_ADC("ADC2B", NULL, CS53L30_ADCDMIC2_CTL1,
                         CS53L30_ADCxB_PDN_SHIFT, 1),
        SND_SOC_DAPM_ADC("DMIC1", NULL, CS53L30_ADCDMIC1_CTL1,
                         CS53L30_DMICx_PDN_SHIFT, 1),
        SND_SOC_DAPM_ADC("DMIC2", NULL, CS53L30_ADCDMIC2_CTL1,
                         CS53L30_DMICx_PDN_SHIFT, 1),
};

static const struct snd_soc_dapm_route cs53l30_dapm_routes[] = {
        /* ADC Input Paths */
        {"ADC1A", NULL, "IN1_DMIC1"},
        {"Input Mux 1", "ADC1_SEL", "ADC1A"},
        {"ADC1B", NULL, "IN2"},

        {"ADC2A", NULL, "IN3_DMIC2"},
        {"Input Mux 2", "ADC2_SEL", "ADC2A"},
        {"ADC2B", NULL, "IN4"},

        /* MIC Bias Paths */
        {"ADC1A", NULL, "MIC1 Bias"},
        {"ADC1B", NULL, "MIC2 Bias"},
        {"ADC2A", NULL, "MIC3 Bias"},
        {"ADC2B", NULL, "MIC4 Bias"},

        /* DMIC Paths */
        {"DMIC1", NULL, "IN1_DMIC1"},
        {"Input Mux 1", "DMIC1_SEL", "DMIC1"},

        {"DMIC2", NULL, "IN3_DMIC2"},
        {"Input Mux 2", "DMIC2_SEL", "DMIC2"},
};

static const struct snd_soc_dapm_route cs53l30_dapm_routes_sdout1[] = {
        /* Output Paths when using SDOUT1 only */
        {"ASP_SDOUT1", NULL, "ADC1A" },
        {"ASP_SDOUT1", NULL, "Input Mux 1"},
        {"ASP_SDOUT1", NULL, "ADC1B"},

        {"ASP_SDOUT1", NULL, "ADC2A"},
        {"ASP_SDOUT1", NULL, "Input Mux 2"},
        {"ASP_SDOUT1", NULL, "ADC2B"},

        {"Capture", NULL, "ASP_SDOUT1"},
};

static const struct snd_soc_dapm_route cs53l30_dapm_routes_sdout2[] = {
        /* Output Paths when using both SDOUT1 and SDOUT2 */
        {"ASP_SDOUT1", NULL, "ADC1A" },
        {"ASP_SDOUT1", NULL, "Input Mux 1"},
        {"ASP_SDOUT1", NULL, "ADC1B"},

        {"ASP_SDOUT2", NULL, "ADC2A"},
        {"ASP_SDOUT2", NULL, "Input Mux 2"},
        {"ASP_SDOUT2", NULL, "ADC2B"},

        {"Capture", NULL, "ASP_SDOUT1"},
        {"Capture", NULL, "ASP_SDOUT2"},
};

struct cs53l30_mclk_div {
        u32 mclk_rate;
        u32 srate;
        u8 asp_rate;
        u8 internal_fs_ratio;
        u8 mclk_int_scale;
};

static const struct cs53l30_mclk_div cs53l30_mclk_coeffs[] = {
        /* NOTE: Enable MCLK_INT_SCALE to save power. */

        /* MCLK, Sample Rate, asp_rate, internal_fs_ratio, mclk_int_scale */
        {5644800, 11025, 0x4, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {5644800, 22050, 0x8, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {5644800, 44100, 0xC, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},

        {6000000,  8000, 0x1, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 11025, 0x2, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 12000, 0x4, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 16000, 0x5, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 22050, 0x6, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 24000, 0x8, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 32000, 0x9, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 44100, 0xA, 0, CS53L30_MCLK_INT_SCALE},
        {6000000, 48000, 0xC, 0, CS53L30_MCLK_INT_SCALE},

        {6144000,  8000, 0x1, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 11025, 0x2, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 12000, 0x4, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 16000, 0x5, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 22050, 0x6, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 24000, 0x8, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 32000, 0x9, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 44100, 0xA, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6144000, 48000, 0xC, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},

        {6400000,  8000, 0x1, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 11025, 0x2, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 12000, 0x4, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 16000, 0x5, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 22050, 0x6, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 24000, 0x8, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 32000, 0x9, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 44100, 0xA, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
        {6400000, 48000, 0xC, CS53L30_INTRNL_FS_RATIO, CS53L30_MCLK_INT_SCALE},
};

struct cs53l30_mclkx_div {
        u32 mclkx;
        u8 ratio;
        u8 mclkdiv;
};

static const struct cs53l30_mclkx_div cs53l30_mclkx_coeffs[] = {
        {5644800,  1, CS53L30_MCLK_DIV_BY_1},
        {6000000,  1, CS53L30_MCLK_DIV_BY_1},
        {6144000,  1, CS53L30_MCLK_DIV_BY_1},
        {11289600, 2, CS53L30_MCLK_DIV_BY_2},
        {12288000, 2, CS53L30_MCLK_DIV_BY_2},
        {12000000, 2, CS53L30_MCLK_DIV_BY_2},
        {19200000, 3, CS53L30_MCLK_DIV_BY_3},
};

static int cs53l30_get_mclkx_coeff(int mclkx)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(cs53l30_mclkx_coeffs); i++) {
                if (cs53l30_mclkx_coeffs[i].mclkx == mclkx)
                        return i;
        }

        return -EINVAL;
}

static int cs53l30_get_mclk_coeff(int mclk_rate, int srate)
{
        int i;

        for (i = 0; i < ARRAY_SIZE(cs53l30_mclk_coeffs); i++) {
                if (cs53l30_mclk_coeffs[i].mclk_rate == mclk_rate &&
                    cs53l30_mclk_coeffs[i].srate == srate)
                        return i;
        }

        return -EINVAL;
}

static int cs53l30_set_sysclk(struct snd_soc_dai *dai,
                              int clk_id, unsigned int freq, int dir)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(dai->component);
        int mclkx_coeff;
        u32 mclk_rate;

        /* MCLKX -> MCLK */
        mclkx_coeff = cs53l30_get_mclkx_coeff(freq);
        if (mclkx_coeff < 0)
                return mclkx_coeff;

        mclk_rate = cs53l30_mclkx_coeffs[mclkx_coeff].mclkx /
                    cs53l30_mclkx_coeffs[mclkx_coeff].ratio;

        regmap_update_bits(priv->regmap, CS53L30_MCLKCTL,
                           CS53L30_MCLK_DIV_MASK,
                           cs53l30_mclkx_coeffs[mclkx_coeff].mclkdiv);

        priv->mclk_rate = mclk_rate;

        return 0;
}

static int cs53l30_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(dai->component);
        u8 aspcfg = 0, aspctl1 = 0;

        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
        case SND_SOC_DAIFMT_CBP_CFP:
                aspcfg |= CS53L30_ASP_MS;
                break;
        case SND_SOC_DAIFMT_CBC_CFC:
                break;
        default:
                return -EINVAL;
        }

        /* DAI mode */
        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
        case SND_SOC_DAIFMT_I2S:
                /* Set TDM_PDN to turn off TDM mode -- Reset default */
                aspctl1 |= CS53L30_ASP_TDM_PDN;
                break;
        case SND_SOC_DAIFMT_DSP_A:
                /*
                 * Clear TDM_PDN to turn on TDM mode; Use ASP_SCLK_INV = 0
                 * with SHIFT_LEFT = 1 combination as Figure 4-13 shows in
                 * the CS53L30 datasheet
                 */
                aspctl1 |= CS53L30_SHIFT_LEFT;
                break;
        default:
                return -EINVAL;
        }

        /* Check to see if the SCLK is inverted */
        switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
        case SND_SOC_DAIFMT_IB_NF:
        case SND_SOC_DAIFMT_IB_IF:
                aspcfg ^= CS53L30_ASP_SCLK_INV;
                break;
        default:
                break;
        }

        regmap_update_bits(priv->regmap, CS53L30_ASPCFG_CTL,
                           CS53L30_ASP_MS | CS53L30_ASP_SCLK_INV, aspcfg);

        regmap_update_bits(priv->regmap, CS53L30_ASP_CTL1,
                           CS53L30_ASP_TDM_PDN | CS53L30_SHIFT_LEFT, aspctl1);

        return 0;
}

static int cs53l30_pcm_hw_params(struct snd_pcm_substream *substream,
                                 struct snd_pcm_hw_params *params,
                                 struct snd_soc_dai *dai)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(dai->component);
        int srate = params_rate(params);
        int mclk_coeff;

        /* MCLK -> srate */
        mclk_coeff = cs53l30_get_mclk_coeff(priv->mclk_rate, srate);
        if (mclk_coeff < 0)
                return -EINVAL;

        regmap_update_bits(priv->regmap, CS53L30_INT_SR_CTL,
                           CS53L30_INTRNL_FS_RATIO_MASK,
                           cs53l30_mclk_coeffs[mclk_coeff].internal_fs_ratio);

        regmap_update_bits(priv->regmap, CS53L30_MCLKCTL,
                           CS53L30_MCLK_INT_SCALE_MASK,
                           cs53l30_mclk_coeffs[mclk_coeff].mclk_int_scale);

        regmap_update_bits(priv->regmap, CS53L30_ASPCFG_CTL,
                           CS53L30_ASP_RATE_MASK,
                           cs53l30_mclk_coeffs[mclk_coeff].asp_rate);

        return 0;
}

static int cs53l30_set_bias_level(struct snd_soc_component *component,
                                  enum snd_soc_bias_level level)
{
        struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component);
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(component);
        enum snd_soc_bias_level bias_level = snd_soc_dapm_get_bias_level(dapm);
        unsigned int reg;
        int i, inter_max_check, ret;

        switch (level) {
        case SND_SOC_BIAS_ON:
                break;
        case SND_SOC_BIAS_PREPARE:
                if (bias_level == SND_SOC_BIAS_STANDBY)
                        regmap_update_bits(priv->regmap, CS53L30_PWRCTL,
                                           CS53L30_PDN_LP_MASK, 0);
                break;
        case SND_SOC_BIAS_STANDBY:
                if (bias_level == SND_SOC_BIAS_OFF) {
                        ret = clk_prepare_enable(priv->mclk);
                        if (ret) {
                                dev_err(component->dev,
                                        "failed to enable MCLK: %d\n", ret);
                                return ret;
                        }
                        regmap_update_bits(priv->regmap, CS53L30_MCLKCTL,
                                           CS53L30_MCLK_DIS_MASK, 0);
                        regmap_update_bits(priv->regmap, CS53L30_PWRCTL,
                                           CS53L30_PDN_ULP_MASK, 0);
                        msleep(50);
                } else {
                        regmap_update_bits(priv->regmap, CS53L30_PWRCTL,
                                           CS53L30_PDN_ULP_MASK,
                                           CS53L30_PDN_ULP);
                }
                break;
        case SND_SOC_BIAS_OFF:
                regmap_update_bits(priv->regmap, CS53L30_INT_MASK,
                                   CS53L30_PDN_DONE, 0);
                /*
                 * If digital softramp is set, the amount of time required
                 * for power down increases and depends on the digital
                 * volume setting.
                 */

                /* Set the max possible time if digsft is set */
                regmap_read(priv->regmap, CS53L30_SFT_RAMP, &reg);
                if (reg & CS53L30_DIGSFT_MASK)
                        inter_max_check = CS53L30_PDN_POLL_MAX;
                else
                        inter_max_check = 10;

                regmap_update_bits(priv->regmap, CS53L30_PWRCTL,
                                   CS53L30_PDN_ULP_MASK,
                                   CS53L30_PDN_ULP);
                /* PDN_DONE will take a min of 20ms to be set.*/
                msleep(20);
                /* Clr status */
                regmap_read(priv->regmap, CS53L30_IS, &reg);
                for (i = 0; i < inter_max_check; i++) {
                        if (inter_max_check < 10) {
                                usleep_range(1000, 1100);
                                regmap_read(priv->regmap, CS53L30_IS, &reg);
                                if (reg & CS53L30_PDN_DONE)
                                        break;
                        } else {
                                usleep_range(10000, 10100);
                                regmap_read(priv->regmap, CS53L30_IS, &reg);
                                if (reg & CS53L30_PDN_DONE)
                                        break;
                        }
                }
                /* PDN_DONE is set. We now can disable the MCLK */
                regmap_update_bits(priv->regmap, CS53L30_INT_MASK,
                                   CS53L30_PDN_DONE, CS53L30_PDN_DONE);
                regmap_update_bits(priv->regmap, CS53L30_MCLKCTL,
                                   CS53L30_MCLK_DIS_MASK,
                                   CS53L30_MCLK_DIS);
                clk_disable_unprepare(priv->mclk);
                break;
        }

        return 0;
}

static int cs53l30_set_tristate(struct snd_soc_dai *dai, int tristate)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(dai->component);
        u8 val = tristate ? CS53L30_ASP_3ST : 0;

        return regmap_update_bits(priv->regmap, CS53L30_ASP_CTL1,
                                  CS53L30_ASP_3ST_MASK, val);
}

/*
 * Note: CS53L30 counts the slot number per byte while ASoC counts the slot
 * number per slot_width. So there is a difference between the slots of ASoC
 * and the slots of CS53L30.
 */
static int cs53l30_set_dai_tdm_slot(struct snd_soc_dai *dai,
                                    unsigned int tx_mask, unsigned int rx_mask,
                                    int slots, int slot_width)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(dai->component);
        unsigned int loc[CS53L30_TDM_SLOT_MAX] = {48, 48, 48, 48};
        unsigned int slot_next, slot_step;
        u64 tx_enable = 0;
        int i;

        if (!rx_mask) {
                dev_err(dai->dev, "rx masks must not be 0\n");
                return -EINVAL;
        }

        /* Assuming slot_width is not supposed to be greater than 64 */
        if (slots <= 0 || slot_width <= 0 || slot_width > 64) {
                dev_err(dai->dev, "invalid slot number or slot width\n");
                return -EINVAL;
        }

        if (slot_width & 0x7) {
                dev_err(dai->dev, "slot width must count in byte\n");
                return -EINVAL;
        }

        /* How many bytes in each ASoC slot */
        slot_step = slot_width >> 3;

        for (i = 0; rx_mask && i < CS53L30_TDM_SLOT_MAX; i++) {
                /* Find the first slot from LSB */
                slot_next = __ffs(rx_mask);
                /* Save the slot location by converting to CS53L30 slot */
                loc[i] = slot_next * slot_step;
                /* Create the mask of CS53L30 slot */
                tx_enable |= (u64)((u64)(1 << slot_step) - 1) << (u64)loc[i];
                /* Clear this slot from rx_mask */
                rx_mask &= ~(1 << slot_next);
        }

        /* Error out to avoid slot shift */
        if (rx_mask && i == CS53L30_TDM_SLOT_MAX) {
                dev_err(dai->dev, "rx_mask exceeds max slot number: %d\n",
                        CS53L30_TDM_SLOT_MAX);
                return -EINVAL;
        }

        /* Validate the last active CS53L30 slot */
        slot_next = loc[i - 1] + slot_step - 1;
        if (slot_next > 47) {
                dev_err(dai->dev, "slot selection out of bounds: %u\n",
                        slot_next);
                return -EINVAL;
        }

        for (i = 0; i < CS53L30_TDM_SLOT_MAX && loc[i] != 48; i++) {
                regmap_update_bits(priv->regmap, CS53L30_ASP_TDMTX_CTL(i),
                                   CS53L30_ASP_CHx_TX_LOC_MASK, loc[i]);
                dev_dbg(dai->dev, "loc[%d]=%x\n", i, loc[i]);
        }

        for (i = 0; i < CS53L30_ASP_TDMTX_ENx_MAX && tx_enable; i++) {
                regmap_write(priv->regmap, CS53L30_ASP_TDMTX_ENx(i),
                             tx_enable & 0xff);
                tx_enable >>= 8;
                dev_dbg(dai->dev, "en_reg=%x, tx_enable=%llx\n",
                        CS53L30_ASP_TDMTX_ENx(i), tx_enable & 0xff);
        }

        return 0;
}

static int cs53l30_mute_stream(struct snd_soc_dai *dai, int mute, int stream)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(dai->component);

        gpiod_set_value_cansleep(priv->mute_gpio, mute);

        return 0;
}

#define CS53L30_RATES (SNDRV_PCM_RATE_8000_48000 |      \
                       SNDRV_PCM_RATE_12000 |           \
                       SNDRV_PCM_RATE_24000)

#define CS53L30_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
                        SNDRV_PCM_FMTBIT_S24_LE)

static const struct snd_soc_dai_ops cs53l30_ops = {
        .hw_params = cs53l30_pcm_hw_params,
        .set_fmt = cs53l30_set_dai_fmt,
        .set_sysclk = cs53l30_set_sysclk,
        .set_tristate = cs53l30_set_tristate,
        .set_tdm_slot = cs53l30_set_dai_tdm_slot,
        .mute_stream = cs53l30_mute_stream,
};

static struct snd_soc_dai_driver cs53l30_dai = {
        .name = "cs53l30",
        .capture = {
                .stream_name = "Capture",
                .channels_min = 1,
                .channels_max = 4,
                .rates = CS53L30_RATES,
                .formats = CS53L30_FORMATS,
        },
        .ops = &cs53l30_ops,
        .symmetric_rate = 1,
};

static int cs53l30_component_probe(struct snd_soc_component *component)
{
        struct cs53l30_private *priv = snd_soc_component_get_drvdata(component);
        struct snd_soc_dapm_context *dapm = snd_soc_component_to_dapm(component);

        if (priv->use_sdout2)
                snd_soc_dapm_add_routes(dapm, cs53l30_dapm_routes_sdout2,
                                        ARRAY_SIZE(cs53l30_dapm_routes_sdout2));
        else
                snd_soc_dapm_add_routes(dapm, cs53l30_dapm_routes_sdout1,
                                        ARRAY_SIZE(cs53l30_dapm_routes_sdout1));

        return 0;
}

static const struct snd_soc_component_driver cs53l30_driver = {
        .probe                  = cs53l30_component_probe,
        .set_bias_level         = cs53l30_set_bias_level,
        .controls               = cs53l30_snd_controls,
        .num_controls           = ARRAY_SIZE(cs53l30_snd_controls),
        .dapm_widgets           = cs53l30_dapm_widgets,
        .num_dapm_widgets       = ARRAY_SIZE(cs53l30_dapm_widgets),
        .dapm_routes            = cs53l30_dapm_routes,
        .num_dapm_routes        = ARRAY_SIZE(cs53l30_dapm_routes),
        .use_pmdown_time        = 1,
        .endianness             = 1,
};

static const struct regmap_config cs53l30_regmap = {
        .reg_bits = 8,
        .val_bits = 8,

        .max_register = CS53L30_MAX_REGISTER,
        .reg_defaults = cs53l30_reg_defaults,
        .num_reg_defaults = ARRAY_SIZE(cs53l30_reg_defaults),
        .volatile_reg = cs53l30_volatile_register,
        .writeable_reg = cs53l30_writeable_register,
        .readable_reg = cs53l30_readable_register,
        .cache_type = REGCACHE_MAPLE,

        .use_single_read = true,
        .use_single_write = true,
};

static int cs53l30_i2c_probe(struct i2c_client *client)
{
        const struct device_node *np = client->dev.of_node;
        struct device *dev = &client->dev;
        struct cs53l30_private *cs53l30;
        unsigned int reg;
        int ret = 0, i, devid;
        u8 val;

        cs53l30 = devm_kzalloc(dev, sizeof(*cs53l30), GFP_KERNEL);
        if (!cs53l30)
                return -ENOMEM;

        for (i = 0; i < ARRAY_SIZE(cs53l30->supplies); i++)
                cs53l30->supplies[i].supply = cs53l30_supply_names[i];

        ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(cs53l30->supplies),
                                      cs53l30->supplies);
        if (ret) {
                dev_err(dev, "failed to get supplies: %d\n", ret);
                return ret;
        }

        ret = regulator_bulk_enable(ARRAY_SIZE(cs53l30->supplies),
                                    cs53l30->supplies);
        if (ret) {
                dev_err(dev, "failed to enable supplies: %d\n", ret);
                return ret;
        }

        /* Reset the Device */
        cs53l30->reset_gpio = devm_gpiod_get_optional(dev, "reset",
                                                      GPIOD_OUT_LOW);
        if (IS_ERR(cs53l30->reset_gpio)) {
                ret = PTR_ERR(cs53l30->reset_gpio);
                goto error_supplies;
        }

        gpiod_set_value_cansleep(cs53l30->reset_gpio, 1);

        i2c_set_clientdata(client, cs53l30);

        cs53l30->mclk_rate = 0;

        cs53l30->regmap = devm_regmap_init_i2c(client, &cs53l30_regmap);
        if (IS_ERR(cs53l30->regmap)) {
                ret = PTR_ERR(cs53l30->regmap);
                dev_err(dev, "regmap_init() failed: %d\n", ret);
                goto error;
        }

        /* Initialize codec */
        devid = cirrus_read_device_id(cs53l30->regmap, CS53L30_DEVID_AB);
        if (devid < 0) {
                ret = devid;
                dev_err(dev, "Failed to read device ID: %d\n", ret);
                goto error;
        }

        if (devid != CS53L30_DEVID) {
                ret = -ENODEV;
                dev_err(dev, "Device ID (%X). Expected %X\n",
                        devid, CS53L30_DEVID);
                goto error;
        }

        ret = regmap_read(cs53l30->regmap, CS53L30_REVID, &reg);
        if (ret < 0) {
                dev_err(dev, "failed to get Revision ID: %d\n", ret);
                goto error;
        }

        /* Check if MCLK provided */
        cs53l30->mclk = devm_clk_get_optional(dev, "mclk");
        if (IS_ERR(cs53l30->mclk)) {
                ret = PTR_ERR(cs53l30->mclk);
                goto error;
        }

        /* Fetch the MUTE control */
        cs53l30->mute_gpio = devm_gpiod_get_optional(dev, "mute",
                                                     GPIOD_OUT_HIGH);
        if (IS_ERR(cs53l30->mute_gpio)) {
                ret = PTR_ERR(cs53l30->mute_gpio);
                goto error;
        }

        if (cs53l30->mute_gpio) {
                /* Enable MUTE controls via MUTE pin */
                regmap_write(cs53l30->regmap, CS53L30_MUTEP_CTL1,
                             CS53L30_MUTEP_CTL1_MUTEALL);
                /* Flip the polarity of MUTE pin */
                if (gpiod_is_active_low(cs53l30->mute_gpio))
                        regmap_update_bits(cs53l30->regmap, CS53L30_MUTEP_CTL2,
                                           CS53L30_MUTE_PIN_POLARITY, 0);
        }

        if (!of_property_read_u8(np, "cirrus,micbias-lvl", &val))
                regmap_update_bits(cs53l30->regmap, CS53L30_MICBIAS_CTL,
                                   CS53L30_MIC_BIAS_CTRL_MASK, val);

        if (of_property_read_bool(np, "cirrus,use-sdout2"))
                cs53l30->use_sdout2 = true;

        dev_info(dev, "Cirrus Logic CS53L30, Revision: %02X\n", reg & 0xFF);

        ret = devm_snd_soc_register_component(dev, &cs53l30_driver, &cs53l30_dai, 1);
        if (ret) {
                dev_err(dev, "failed to register component: %d\n", ret);
                goto error;
        }

        return 0;

error:
        gpiod_set_value_cansleep(cs53l30->reset_gpio, 0);
error_supplies:
        regulator_bulk_disable(ARRAY_SIZE(cs53l30->supplies),
                               cs53l30->supplies);
        return ret;
}

static void cs53l30_i2c_remove(struct i2c_client *client)
{
        struct cs53l30_private *cs53l30 = i2c_get_clientdata(client);

        /* Hold down reset */
        gpiod_set_value_cansleep(cs53l30->reset_gpio, 0);

        regulator_bulk_disable(ARRAY_SIZE(cs53l30->supplies),
                               cs53l30->supplies);
}

static int cs53l30_runtime_suspend(struct device *dev)
{
        struct cs53l30_private *cs53l30 = dev_get_drvdata(dev);

        regcache_cache_only(cs53l30->regmap, true);

        /* Hold down reset */
        gpiod_set_value_cansleep(cs53l30->reset_gpio, 0);

        regulator_bulk_disable(ARRAY_SIZE(cs53l30->supplies),
                               cs53l30->supplies);

        return 0;
}

static int cs53l30_runtime_resume(struct device *dev)
{
        struct cs53l30_private *cs53l30 = dev_get_drvdata(dev);
        int ret;

        ret = regulator_bulk_enable(ARRAY_SIZE(cs53l30->supplies),
                                    cs53l30->supplies);
        if (ret) {
                dev_err(dev, "failed to enable supplies: %d\n", ret);
                return ret;
        }

        gpiod_set_value_cansleep(cs53l30->reset_gpio, 1);

        regcache_cache_only(cs53l30->regmap, false);
        ret = regcache_sync(cs53l30->regmap);
        if (ret) {
                dev_err(dev, "failed to synchronize regcache: %d\n", ret);
                return ret;
        }

        return 0;
}

static const struct dev_pm_ops cs53l30_runtime_pm = {
        RUNTIME_PM_OPS(cs53l30_runtime_suspend, cs53l30_runtime_resume, NULL)
};

static const struct of_device_id cs53l30_of_match[] = {
        { .compatible = "cirrus,cs53l30", },
        {},
};

MODULE_DEVICE_TABLE(of, cs53l30_of_match);

static const struct i2c_device_id cs53l30_id[] = {
        { "cs53l30" },
        {}
};

MODULE_DEVICE_TABLE(i2c, cs53l30_id);

static struct i2c_driver cs53l30_i2c_driver = {
        .driver = {
                .name = "cs53l30",
                .of_match_table = cs53l30_of_match,
                .pm = pm_ptr(&cs53l30_runtime_pm),
        },
        .id_table = cs53l30_id,
        .probe = cs53l30_i2c_probe,
        .remove = cs53l30_i2c_remove,
};

module_i2c_driver(cs53l30_i2c_driver);

MODULE_DESCRIPTION("ASoC CS53L30 driver");
MODULE_AUTHOR("Paul Handrigan, Cirrus Logic Inc, <Paul.Handrigan@cirrus.com>");
MODULE_LICENSE("GPL");