ASoC: nau8822: new codec driver

Add driver for NAU88C22.

Signed-off-by: David Lin <[e-mail]>
Signed-off-by: Mark Brown <[e-mail]>

Documentation/devicetree/bindings/sound/nau8822.txt

···
+NAU8822 audio CODEC
+
+This device supports I2C only.
+
+Required properties:
+
+  - compatible : "nuvoton,nau8822"
+
+  - reg : the I2C address of the device.
+
+Example:
+
+codec: nau8822@1a {
+	compatible = "nuvoton,nau8822";
+	reg = <0x1a>;
+};

sound/soc/codecs/Kconfig

···
 	select SND_SOC_MT6351 if MTK_PMIC_WRAP
 	select SND_SOC_NAU8540 if I2C
 	select SND_SOC_NAU8810 if I2C
+	select SND_SOC_NAU8822 if I2C
 	select SND_SOC_NAU8824 if I2C
 	select SND_SOC_NAU8825 if I2C
 	select SND_SOC_HDMI_CODEC
···
 
 config SND_SOC_NAU8810
 	tristate "Nuvoton Technology Corporation NAU88C10 CODEC"
+	depends on I2C
+
+config SND_SOC_NAU8822
+	tristate "Nuvoton Technology Corporation NAU88C22 CODEC"
 	depends on I2C
 
 config SND_SOC_NAU8824

sound/soc/codecs/Makefile

···
 snd-soc-mt6351-objs := mt6351.o
 snd-soc-nau8540-objs := nau8540.o
 snd-soc-nau8810-objs := nau8810.o
+snd-soc-nau8822-objs := nau8822.o
 snd-soc-nau8824-objs := nau8824.o
 snd-soc-nau8825-objs := nau8825.o
 snd-soc-hdmi-codec-objs := hdmi-codec.o
···
 obj-$(CONFIG_SND_SOC_MT6351)	+= snd-soc-mt6351.o
 obj-$(CONFIG_SND_SOC_NAU8540)   += snd-soc-nau8540.o
 obj-$(CONFIG_SND_SOC_NAU8810)   += snd-soc-nau8810.o
+obj-$(CONFIG_SND_SOC_NAU8822)   += snd-soc-nau8822.o
 obj-$(CONFIG_SND_SOC_NAU8824)   += snd-soc-nau8824.o
 obj-$(CONFIG_SND_SOC_NAU8825)   += snd-soc-nau8825.o
 obj-$(CONFIG_SND_SOC_HDMI_CODEC)	+= snd-soc-hdmi-codec.o

sound/soc/codecs/nau8822.c

···
+/*
+ * nau8822.c  --  NAU8822 ALSA Soc Audio Codec driver
+ *
+ * Copyright 2017 Nuvoton Technology Corp.
+ *
+ * Author: David Lin <[e-mail]>
+ * Co-author: John Hsu <[e-mail]>
+ * Co-author: Seven Li <[e-mail]>
+ *
+ * Based on WM8974.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+#include <asm/div64.h>
+#include "nau8822.h"
+
+#define NAU_PLL_FREQ_MAX 100000000
+#define NAU_PLL_FREQ_MIN 90000000
+#define NAU_PLL_REF_MAX 33000000
+#define NAU_PLL_REF_MIN 8000000
+#define NAU_PLL_OPTOP_MIN 6
+
+static const int nau8822_mclk_scaler[] = { 10, 15, 20, 30, 40, 60, 80, 120 };
+
+static const struct reg_default nau8822_reg_defaults[] = {
+	{ NAU8822_REG_POWER_MANAGEMENT_1, 0x0000 },
+	{ NAU8822_REG_POWER_MANAGEMENT_2, 0x0000 },
+	{ NAU8822_REG_POWER_MANAGEMENT_3, 0x0000 },
+	{ NAU8822_REG_AUDIO_INTERFACE, 0x0050 },
+	{ NAU8822_REG_COMPANDING_CONTROL, 0x0000 },
+	{ NAU8822_REG_CLOCKING, 0x0140 },
+	{ NAU8822_REG_ADDITIONAL_CONTROL, 0x0000 },
+	{ NAU8822_REG_GPIO_CONTROL, 0x0000 },
+	{ NAU8822_REG_JACK_DETECT_CONTROL_1, 0x0000 },
+	{ NAU8822_REG_DAC_CONTROL, 0x0000 },
+	{ NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME, 0x00ff },
+	{ NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME, 0x00ff },
+	{ NAU8822_REG_JACK_DETECT_CONTROL_2, 0x0000 },
+	{ NAU8822_REG_ADC_CONTROL, 0x0100 },
+	{ NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME, 0x00ff },
+	{ NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME, 0x00ff },
+	{ NAU8822_REG_EQ1, 0x012c },
+	{ NAU8822_REG_EQ2, 0x002c },
+	{ NAU8822_REG_EQ3, 0x002c },
+	{ NAU8822_REG_EQ4, 0x002c },
+	{ NAU8822_REG_EQ5, 0x002c },
+	{ NAU8822_REG_DAC_LIMITER_1, 0x0032 },
+	{ NAU8822_REG_DAC_LIMITER_2, 0x0000 },
+	{ NAU8822_REG_NOTCH_FILTER_1, 0x0000 },
+	{ NAU8822_REG_NOTCH_FILTER_2, 0x0000 },
+	{ NAU8822_REG_NOTCH_FILTER_3, 0x0000 },
+	{ NAU8822_REG_NOTCH_FILTER_4, 0x0000 },
+	{ NAU8822_REG_ALC_CONTROL_1, 0x0038 },
+	{ NAU8822_REG_ALC_CONTROL_2, 0x000b },
+	{ NAU8822_REG_ALC_CONTROL_3, 0x0032 },
+	{ NAU8822_REG_NOISE_GATE, 0x0010 },
+	{ NAU8822_REG_PLL_N, 0x0008 },
+	{ NAU8822_REG_PLL_K1, 0x000c },
+	{ NAU8822_REG_PLL_K2, 0x0093 },
+	{ NAU8822_REG_PLL_K3, 0x00e9 },
+	{ NAU8822_REG_3D_CONTROL, 0x0000 },
+	{ NAU8822_REG_RIGHT_SPEAKER_CONTROL, 0x0000 },
+	{ NAU8822_REG_INPUT_CONTROL, 0x0033 },
+	{ NAU8822_REG_LEFT_INP_PGA_CONTROL, 0x0010 },
+	{ NAU8822_REG_RIGHT_INP_PGA_CONTROL, 0x0010 },
+	{ NAU8822_REG_LEFT_ADC_BOOST_CONTROL, 0x0100 },
+	{ NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 0x0100 },
+	{ NAU8822_REG_OUTPUT_CONTROL, 0x0002 },
+	{ NAU8822_REG_LEFT_MIXER_CONTROL, 0x0001 },
+	{ NAU8822_REG_RIGHT_MIXER_CONTROL, 0x0001 },
+	{ NAU8822_REG_LHP_VOLUME, 0x0039 },
+	{ NAU8822_REG_RHP_VOLUME, 0x0039 },
+	{ NAU8822_REG_LSPKOUT_VOLUME, 0x0039 },
+	{ NAU8822_REG_RSPKOUT_VOLUME, 0x0039 },
+	{ NAU8822_REG_AUX2_MIXER, 0x0001 },
+	{ NAU8822_REG_AUX1_MIXER, 0x0001 },
+	{ NAU8822_REG_POWER_MANAGEMENT_4, 0x0000 },
+	{ NAU8822_REG_LEFT_TIME_SLOT, 0x0000 },
+	{ NAU8822_REG_MISC, 0x0020 },
+	{ NAU8822_REG_RIGHT_TIME_SLOT, 0x0000 },
+	{ NAU8822_REG_DEVICE_REVISION, 0x007f },
+	{ NAU8822_REG_DEVICE_ID, 0x001a },
+	{ NAU8822_REG_DAC_DITHER, 0x0114 },
+	{ NAU8822_REG_ALC_ENHANCE_1, 0x0000 },
+	{ NAU8822_REG_ALC_ENHANCE_2, 0x0000 },
+	{ NAU8822_REG_192KHZ_SAMPLING, 0x0008 },
+	{ NAU8822_REG_MISC_CONTROL, 0x0000 },
+	{ NAU8822_REG_INPUT_TIEOFF, 0x0000 },
+	{ NAU8822_REG_POWER_REDUCTION, 0x0000 },
+	{ NAU8822_REG_AGC_PEAK2PEAK, 0x0000 },
+	{ NAU8822_REG_AGC_PEAK_DETECT, 0x0000 },
+	{ NAU8822_REG_AUTOMUTE_CONTROL, 0x0000 },
+	{ NAU8822_REG_OUTPUT_TIEOFF, 0x0000 },
+};
+
+static bool nau8822_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case NAU8822_REG_RESET ... NAU8822_REG_JACK_DETECT_CONTROL_1:
+	case NAU8822_REG_DAC_CONTROL ... NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME:
+	case NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME:
+	case NAU8822_REG_EQ1 ... NAU8822_REG_EQ5:
+	case NAU8822_REG_DAC_LIMITER_1 ... NAU8822_REG_DAC_LIMITER_2:
+	case NAU8822_REG_NOTCH_FILTER_1 ... NAU8822_REG_NOTCH_FILTER_4:
+	case NAU8822_REG_ALC_CONTROL_1 ...NAU8822_REG_PLL_K3:
+	case NAU8822_REG_3D_CONTROL:
+	case NAU8822_REG_RIGHT_SPEAKER_CONTROL:
+	case NAU8822_REG_INPUT_CONTROL ... NAU8822_REG_LEFT_ADC_BOOST_CONTROL:
+	case NAU8822_REG_RIGHT_ADC_BOOST_CONTROL ... NAU8822_REG_AUX1_MIXER:
+	case NAU8822_REG_POWER_MANAGEMENT_4 ... NAU8822_REG_DEVICE_ID:
+	case NAU8822_REG_DAC_DITHER:
+	case NAU8822_REG_ALC_ENHANCE_1 ... NAU8822_REG_MISC_CONTROL:
+	case NAU8822_REG_INPUT_TIEOFF ... NAU8822_REG_OUTPUT_TIEOFF:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool nau8822_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case NAU8822_REG_RESET ... NAU8822_REG_JACK_DETECT_CONTROL_1:
+	case NAU8822_REG_DAC_CONTROL ... NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME:
+	case NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME:
+	case NAU8822_REG_EQ1 ... NAU8822_REG_EQ5:
+	case NAU8822_REG_DAC_LIMITER_1 ... NAU8822_REG_DAC_LIMITER_2:
+	case NAU8822_REG_NOTCH_FILTER_1 ... NAU8822_REG_NOTCH_FILTER_4:
+	case NAU8822_REG_ALC_CONTROL_1 ...NAU8822_REG_PLL_K3:
+	case NAU8822_REG_3D_CONTROL:
+	case NAU8822_REG_RIGHT_SPEAKER_CONTROL:
+	case NAU8822_REG_INPUT_CONTROL ... NAU8822_REG_LEFT_ADC_BOOST_CONTROL:
+	case NAU8822_REG_RIGHT_ADC_BOOST_CONTROL ... NAU8822_REG_AUX1_MIXER:
+	case NAU8822_REG_POWER_MANAGEMENT_4 ... NAU8822_REG_DEVICE_ID:
+	case NAU8822_REG_DAC_DITHER:
+	case NAU8822_REG_ALC_ENHANCE_1 ... NAU8822_REG_MISC_CONTROL:
+	case NAU8822_REG_INPUT_TIEOFF ... NAU8822_REG_OUTPUT_TIEOFF:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool nau8822_volatile(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case NAU8822_REG_RESET:
+	case NAU8822_REG_DEVICE_REVISION:
+	case NAU8822_REG_DEVICE_ID:
+	case NAU8822_REG_AGC_PEAK2PEAK:
+	case NAU8822_REG_AGC_PEAK_DETECT:
+	case NAU8822_REG_AUTOMUTE_CONTROL:
+		return true;
+	default:
+		return false;
+	}
+}
+
+/* The EQ parameters get function is to get the 5 band equalizer control.
+ * The regmap raw read can't work here because regmap doesn't provide
+ * value format for value width of 9 bits. Therefore, the driver reads data
+ * from cache and makes value format according to the endianness of
+ * bytes type control element.
+ */
+static int nau8822_eq_get(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct soc_bytes_ext *params = (void *)kcontrol->private_value;
+	int i, reg;
+	u16 reg_val, *val;
+
+	val = (u16 *)ucontrol->value.bytes.data;
+	reg = NAU8822_REG_EQ1;
+	for (i = 0; i < params->max / sizeof(u16); i++) {
+		reg_val = snd_soc_component_read32(component, reg + i);
+		/* conversion of 16-bit integers between native CPU format
+		 * and big endian format
+		 */
+		reg_val = cpu_to_be16(reg_val);
+		memcpy(val + i, &reg_val, sizeof(reg_val));
+	}
+
+	return 0;
+}
+
+/* The EQ parameters put function is to make configuration of 5 band equalizer
+ * control. These configuration includes central frequency, equalizer gain,
+ * cut-off frequency, bandwidth control, and equalizer path.
+ * The regmap raw write can't work here because regmap doesn't provide
+ * register and value format for register with address 7 bits and value 9 bits.
+ * Therefore, the driver makes value format according to the endianness of
+ * bytes type control element and writes data to codec.
+ */
+static int nau8822_eq_put(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_component *component =
+			snd_soc_kcontrol_component(kcontrol);
+	struct soc_bytes_ext *params = (void *)kcontrol->private_value;
+	void *data;
+	u16 *val, value;
+	int i, reg, ret;
+
+	data = kmemdup(ucontrol->value.bytes.data,
+		params->max, GFP_KERNEL | GFP_DMA);
+	if (!data)
+		return -ENOMEM;
+
+	val = (u16 *)data;
+	reg = NAU8822_REG_EQ1;
+	for (i = 0; i < params->max / sizeof(u16); i++) {
+		/* conversion of 16-bit integers between native CPU format
+		 * and big endian format
+		 */
+		value = be16_to_cpu(*(val + i));
+		ret = snd_soc_component_write(component, reg + i, value);
+		if (ret) {
+			dev_err(component->dev,
+			    "EQ configuration fail, register: %x ret: %d\n",
+			    reg + i, ret);
+			kfree(data);
+			return ret;
+		}
+	}
+	kfree(data);
+
+	return 0;
+}
+
+static const char * const nau8822_companding[] = {
+	"Off", "NC", "u-law", "A-law"};
+
+static const struct soc_enum nau8822_companding_adc_enum =
+	SOC_ENUM_SINGLE(NAU8822_REG_COMPANDING_CONTROL, NAU8822_ADCCM_SFT,
+		ARRAY_SIZE(nau8822_companding), nau8822_companding);
+
+static const struct soc_enum nau8822_companding_dac_enum =
+	SOC_ENUM_SINGLE(NAU8822_REG_COMPANDING_CONTROL, NAU8822_DACCM_SFT,
+		ARRAY_SIZE(nau8822_companding), nau8822_companding);
+
+static const char * const nau8822_eqmode[] = {"Capture", "Playback"};
+
+static const struct soc_enum nau8822_eqmode_enum =
+	SOC_ENUM_SINGLE(NAU8822_REG_EQ1, NAU8822_EQM_SFT,
+		ARRAY_SIZE(nau8822_eqmode), nau8822_eqmode);
+
+static const char * const nau8822_alc1[] = {"Off", "Right", "Left", "Both"};
+static const char * const nau8822_alc3[] = {"Normal", "Limiter"};
+
+static const struct soc_enum nau8822_alc_enable_enum =
+	SOC_ENUM_SINGLE(NAU8822_REG_ALC_CONTROL_1, NAU8822_ALCEN_SFT,
+		ARRAY_SIZE(nau8822_alc1), nau8822_alc1);
+
+static const struct soc_enum nau8822_alc_mode_enum =
+	SOC_ENUM_SINGLE(NAU8822_REG_ALC_CONTROL_3, NAU8822_ALCM_SFT,
+		ARRAY_SIZE(nau8822_alc3), nau8822_alc3);
+
+static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
+static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0);
+static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0);
+static const DECLARE_TLV_DB_SCALE(pga_boost_tlv, 0, 2000, 0);
+static const DECLARE_TLV_DB_SCALE(boost_tlv, -1500, 300, 1);
+static const DECLARE_TLV_DB_SCALE(limiter_tlv, 0, 100, 0);
+
+static const struct snd_kcontrol_new nau8822_snd_controls[] = {
+	SOC_ENUM("ADC Companding", nau8822_companding_adc_enum),
+	SOC_ENUM("DAC Companding", nau8822_companding_dac_enum),
+
+	SOC_ENUM("EQ Function", nau8822_eqmode_enum),
+	SND_SOC_BYTES_EXT("EQ Parameters", 10,
+		  nau8822_eq_get, nau8822_eq_put),
+
+	SOC_DOUBLE("DAC Inversion Switch",
+		NAU8822_REG_DAC_CONTROL, 0, 1, 1, 0),
+	SOC_DOUBLE_R_TLV("PCM Volume",
+		NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME,
+		NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME, 0, 255, 0, digital_tlv),
+
+	SOC_SINGLE("High Pass Filter Switch",
+		NAU8822_REG_ADC_CONTROL, 8, 1, 0),
+	SOC_SINGLE("High Pass Cut Off",
+		NAU8822_REG_ADC_CONTROL, 4, 7, 0),
+
+	SOC_DOUBLE("ADC Inversion Switch",
+		NAU8822_REG_ADC_CONTROL, 0, 1, 1, 0),
+	SOC_DOUBLE_R_TLV("ADC Volume",
+		NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME,
+		NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME, 0, 255, 0, digital_tlv),
+
+	SOC_SINGLE("DAC Limiter Switch",
+		NAU8822_REG_DAC_LIMITER_1, 8, 1, 0),
+	SOC_SINGLE("DAC Limiter Decay",
+		NAU8822_REG_DAC_LIMITER_1, 4, 15, 0),
+	SOC_SINGLE("DAC Limiter Attack",
+		NAU8822_REG_DAC_LIMITER_1, 0, 15, 0),
+	SOC_SINGLE("DAC Limiter Threshold",
+		NAU8822_REG_DAC_LIMITER_2, 4, 7, 0),
+	SOC_SINGLE_TLV("DAC Limiter Volume",
+		NAU8822_REG_DAC_LIMITER_2, 0, 12, 0, limiter_tlv),
+
+	SOC_ENUM("ALC Mode", nau8822_alc_mode_enum),
+	SOC_ENUM("ALC Enable Switch", nau8822_alc_enable_enum),
+	SOC_SINGLE("ALC Min Gain",
+		NAU8822_REG_ALC_CONTROL_1, 0, 7, 0),
+	SOC_SINGLE("ALC Max Gain",
+		NAU8822_REG_ALC_CONTROL_1, 3, 7, 0),
+	SOC_SINGLE("ALC Hold",
+		NAU8822_REG_ALC_CONTROL_2, 4, 10, 0),
+	SOC_SINGLE("ALC Target",
+		NAU8822_REG_ALC_CONTROL_2, 0, 15, 0),
+	SOC_SINGLE("ALC Decay",
+		NAU8822_REG_ALC_CONTROL_3, 4, 10, 0),
+	SOC_SINGLE("ALC Attack",
+		NAU8822_REG_ALC_CONTROL_3, 0, 10, 0),
+	SOC_SINGLE("ALC Noise Gate Switch",
+		NAU8822_REG_NOISE_GATE, 3, 1, 0),
+	SOC_SINGLE("ALC Noise Gate Threshold",
+		NAU8822_REG_NOISE_GATE, 0, 7, 0),
+
+	SOC_DOUBLE_R("PGA ZC Switch",
+		NAU8822_REG_LEFT_INP_PGA_CONTROL,
+		NAU8822_REG_RIGHT_INP_PGA_CONTROL,
+		7, 1, 0),
+	SOC_DOUBLE_R_TLV("PGA Volume",
+		NAU8822_REG_LEFT_INP_PGA_CONTROL,
+		NAU8822_REG_RIGHT_INP_PGA_CONTROL, 0, 63, 0, inpga_tlv),
+
+	SOC_DOUBLE_R("Headphone ZC Switch",
+		NAU8822_REG_LHP_VOLUME,
+		NAU8822_REG_RHP_VOLUME, 7, 1, 0),
+	SOC_DOUBLE_R("Headphone Playback Switch",
+		NAU8822_REG_LHP_VOLUME,
+		NAU8822_REG_RHP_VOLUME, 6, 1, 1),
+	SOC_DOUBLE_R_TLV("Headphone Volume",
+		NAU8822_REG_LHP_VOLUME,
+		NAU8822_REG_RHP_VOLUME,	0, 63, 0, spk_tlv),
+
+	SOC_DOUBLE_R("Speaker ZC Switch",
+		NAU8822_REG_LSPKOUT_VOLUME,
+		NAU8822_REG_RSPKOUT_VOLUME, 7, 1, 0),
+	SOC_DOUBLE_R("Speaker Playback Switch",
+		NAU8822_REG_LSPKOUT_VOLUME,
+		NAU8822_REG_RSPKOUT_VOLUME, 6, 1, 1),
+	SOC_DOUBLE_R_TLV("Speaker Volume",
+		NAU8822_REG_LSPKOUT_VOLUME,
+		NAU8822_REG_RSPKOUT_VOLUME, 0, 63, 0, spk_tlv),
+
+	SOC_DOUBLE_R("AUXOUT Playback Switch",
+		NAU8822_REG_AUX2_MIXER,
+		NAU8822_REG_AUX1_MIXER, 6, 1, 1),
+
+	SOC_DOUBLE_R_TLV("PGA Boost Volume",
+		NAU8822_REG_LEFT_ADC_BOOST_CONTROL,
+		NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 8, 1, 0, pga_boost_tlv),
+	SOC_DOUBLE_R_TLV("L2/R2 Boost Volume",
+		NAU8822_REG_LEFT_ADC_BOOST_CONTROL,
+		NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 4, 7, 0, boost_tlv),
+	SOC_DOUBLE_R_TLV("Aux Boost Volume",
+		NAU8822_REG_LEFT_ADC_BOOST_CONTROL,
+		NAU8822_REG_RIGHT_ADC_BOOST_CONTROL, 0, 7, 0, boost_tlv),
+
+	SOC_SINGLE("DAC 128x Oversampling Switch",
+		NAU8822_REG_DAC_CONTROL, 5, 1, 0),
+	SOC_SINGLE("ADC 128x Oversampling Switch",
+		NAU8822_REG_ADC_CONTROL, 5, 1, 0),
+};
+
+/* LMAIN and RMAIN Mixer */
+static const struct snd_kcontrol_new nau8822_left_out_mixer[] = {
+	SOC_DAPM_SINGLE("LINMIX Switch",
+		NAU8822_REG_LEFT_MIXER_CONTROL, 1, 1, 0),
+	SOC_DAPM_SINGLE("LAUX Switch",
+		NAU8822_REG_LEFT_MIXER_CONTROL, 5, 1, 0),
+	SOC_DAPM_SINGLE("LDAC Switch",
+		NAU8822_REG_LEFT_MIXER_CONTROL, 0, 1, 0),
+	SOC_DAPM_SINGLE("RDAC Switch",
+		NAU8822_REG_OUTPUT_CONTROL, 5, 1, 0),
+};
+
+static const struct snd_kcontrol_new nau8822_right_out_mixer[] = {
+	SOC_DAPM_SINGLE("RINMIX Switch",
+		NAU8822_REG_RIGHT_MIXER_CONTROL, 1, 1, 0),
+	SOC_DAPM_SINGLE("RAUX Switch",
+		NAU8822_REG_RIGHT_MIXER_CONTROL, 5, 1, 0),
+	SOC_DAPM_SINGLE("RDAC Switch",
+		NAU8822_REG_RIGHT_MIXER_CONTROL, 0, 1, 0),
+	SOC_DAPM_SINGLE("LDAC Switch",
+		NAU8822_REG_OUTPUT_CONTROL, 6, 1, 0),
+};
+
+/* AUX1 and AUX2 Mixer */
+static const struct snd_kcontrol_new nau8822_auxout1_mixer[] = {
+	SOC_DAPM_SINGLE("RDAC Switch", NAU8822_REG_AUX1_MIXER, 0, 1, 0),
+	SOC_DAPM_SINGLE("RMIX Switch", NAU8822_REG_AUX1_MIXER, 1, 1, 0),
+	SOC_DAPM_SINGLE("RINMIX Switch", NAU8822_REG_AUX1_MIXER, 2, 1, 0),
+	SOC_DAPM_SINGLE("LDAC Switch", NAU8822_REG_AUX1_MIXER, 3, 1, 0),
+	SOC_DAPM_SINGLE("LMIX Switch", NAU8822_REG_AUX1_MIXER, 4, 1, 0),
+};
+
+static const struct snd_kcontrol_new nau8822_auxout2_mixer[] = {
+	SOC_DAPM_SINGLE("LDAC Switch", NAU8822_REG_AUX2_MIXER, 0, 1, 0),
+	SOC_DAPM_SINGLE("LMIX Switch", NAU8822_REG_AUX2_MIXER, 1, 1, 0),
+	SOC_DAPM_SINGLE("LINMIX Switch", NAU8822_REG_AUX2_MIXER, 2, 1, 0),
+	SOC_DAPM_SINGLE("AUX1MIX Output Switch",
+		NAU8822_REG_AUX2_MIXER, 3, 1, 0),
+};
+
+/* Input PGA */
+static const struct snd_kcontrol_new nau8822_left_input_mixer[] = {
+	SOC_DAPM_SINGLE("L2 Switch", NAU8822_REG_INPUT_CONTROL, 2, 1, 0),
+	SOC_DAPM_SINGLE("MicN Switch", NAU8822_REG_INPUT_CONTROL, 1, 1, 0),
+	SOC_DAPM_SINGLE("MicP Switch", NAU8822_REG_INPUT_CONTROL, 0, 1, 0),
+};
+static const struct snd_kcontrol_new nau8822_right_input_mixer[] = {
+	SOC_DAPM_SINGLE("R2 Switch", NAU8822_REG_INPUT_CONTROL, 6, 1, 0),
+	SOC_DAPM_SINGLE("MicN Switch", NAU8822_REG_INPUT_CONTROL, 5, 1, 0),
+	SOC_DAPM_SINGLE("MicP Switch", NAU8822_REG_INPUT_CONTROL, 4, 1, 0),
+};
+
+/* Loopback Switch */
+static const struct snd_kcontrol_new nau8822_loopback =
+	SOC_DAPM_SINGLE("Switch", NAU8822_REG_COMPANDING_CONTROL,
+		NAU8822_ADDAP_SFT, 1, 0);
+
+static int check_mclk_select_pll(struct snd_soc_dapm_widget *source,
+			 struct snd_soc_dapm_widget *sink)
+{
+	struct snd_soc_component *component =
+		snd_soc_dapm_to_component(source->dapm);
+	unsigned int value;
+
+	value = snd_soc_component_read32(component, NAU8822_REG_CLOCKING);
+
+	return (value & NAU8822_CLKM_MASK);
+}
+
+static const struct snd_soc_dapm_widget nau8822_dapm_widgets[] = {
+	SND_SOC_DAPM_DAC("Left DAC", "Left HiFi Playback",
+		NAU8822_REG_POWER_MANAGEMENT_3, 0, 0),
+	SND_SOC_DAPM_DAC("Right DAC", "Right HiFi Playback",
+		NAU8822_REG_POWER_MANAGEMENT_3, 1, 0),
+	SND_SOC_DAPM_ADC("Left ADC", "Left HiFi Capture",
+		NAU8822_REG_POWER_MANAGEMENT_2, 0, 0),
+	SND_SOC_DAPM_ADC("Right ADC", "Right HiFi Capture",
+		NAU8822_REG_POWER_MANAGEMENT_2, 1, 0),
+
+	SOC_MIXER_ARRAY("Left Output Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_3, 2, 0, nau8822_left_out_mixer),
+	SOC_MIXER_ARRAY("Right Output Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_3,	3, 0, nau8822_right_out_mixer),
+	SOC_MIXER_ARRAY("AUX1 Output Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_1, 7, 0, nau8822_auxout1_mixer),
+	SOC_MIXER_ARRAY("AUX2 Output Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_1,	6, 0, nau8822_auxout2_mixer),
+
+	SOC_MIXER_ARRAY("Left Input Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_2,
+		2, 0, nau8822_left_input_mixer),
+	SOC_MIXER_ARRAY("Right Input Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_2,
+		3, 0, nau8822_right_input_mixer),
+
+	SND_SOC_DAPM_PGA("Left Boost Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_2, 4, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Boost Mixer",
+		NAU8822_REG_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
+
+	SND_SOC_DAPM_PGA("Left Capture PGA",
+		NAU8822_REG_LEFT_INP_PGA_CONTROL, 6, 1, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Capture PGA",
+		NAU8822_REG_RIGHT_INP_PGA_CONTROL, 6, 1, NULL, 0),
+
+	SND_SOC_DAPM_PGA("Left Headphone Out",
+		NAU8822_REG_POWER_MANAGEMENT_2, 7, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Headphone Out",
+		NAU8822_REG_POWER_MANAGEMENT_2, 8, 0, NULL, 0),
+
+	SND_SOC_DAPM_PGA("Left Speaker Out",
+		 NAU8822_REG_POWER_MANAGEMENT_3, 6, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("Right Speaker Out",
+		NAU8822_REG_POWER_MANAGEMENT_3,	5, 0, NULL, 0),
+
+	SND_SOC_DAPM_PGA("AUX1 Out",
+		NAU8822_REG_POWER_MANAGEMENT_3,	8, 0, NULL, 0),
+	SND_SOC_DAPM_PGA("AUX2 Out",
+		NAU8822_REG_POWER_MANAGEMENT_3,	7, 0, NULL, 0),
+
+	SND_SOC_DAPM_SUPPLY("Mic Bias",
+		NAU8822_REG_POWER_MANAGEMENT_1,	4, 0, NULL, 0),
+	SND_SOC_DAPM_SUPPLY("PLL",
+		NAU8822_REG_POWER_MANAGEMENT_1,	5, 0, NULL, 0),
+
+	SND_SOC_DAPM_SWITCH("Digital Loopback", SND_SOC_NOPM, 0, 0,
+		&nau8822_loopback),
+
+	SND_SOC_DAPM_INPUT("LMICN"),
+	SND_SOC_DAPM_INPUT("LMICP"),
+	SND_SOC_DAPM_INPUT("RMICN"),
+	SND_SOC_DAPM_INPUT("RMICP"),
+	SND_SOC_DAPM_INPUT("LAUX"),
+	SND_SOC_DAPM_INPUT("RAUX"),
+	SND_SOC_DAPM_INPUT("L2"),
+	SND_SOC_DAPM_INPUT("R2"),
+	SND_SOC_DAPM_OUTPUT("LHP"),
+	SND_SOC_DAPM_OUTPUT("RHP"),
+	SND_SOC_DAPM_OUTPUT("LSPK"),
+	SND_SOC_DAPM_OUTPUT("RSPK"),
+	SND_SOC_DAPM_OUTPUT("AUXOUT1"),
+	SND_SOC_DAPM_OUTPUT("AUXOUT2"),
+};
+
+static const struct snd_soc_dapm_route nau8822_dapm_routes[] = {
+	{"Right DAC", NULL, "PLL", check_mclk_select_pll},
+	{"Left DAC", NULL, "PLL", check_mclk_select_pll},
+
+	/* LMAIN and RMAIN Mixer */
+	{"Right Output Mixer", "LDAC Switch", "Left DAC"},
+	{"Right Output Mixer", "RDAC Switch", "Right DAC"},
+	{"Right Output Mixer", "RAUX Switch", "RAUX"},
+	{"Right Output Mixer", "RINMIX Switch", "Right Boost Mixer"},
+
+	{"Left Output Mixer", "LDAC Switch", "Left DAC"},
+	{"Left Output Mixer", "RDAC Switch", "Right DAC"},
+	{"Left Output Mixer", "LAUX Switch", "LAUX"},
+	{"Left Output Mixer", "LINMIX Switch", "Left Boost Mixer"},
+
+	/* AUX1 and AUX2 Mixer */
+	{"AUX1 Output Mixer", "RDAC Switch", "Right DAC"},
+	{"AUX1 Output Mixer", "RMIX Switch", "Right Output Mixer"},
+	{"AUX1 Output Mixer", "RINMIX Switch", "Right Boost Mixer"},
+	{"AUX1 Output Mixer", "LDAC Switch", "Left DAC"},
+	{"AUX1 Output Mixer", "LMIX Switch", "Left Output Mixer"},
+
+	{"AUX2 Output Mixer", "LDAC Switch", "Left DAC"},
+	{"AUX2 Output Mixer", "LMIX Switch", "Left Output Mixer"},
+	{"AUX2 Output Mixer", "LINMIX Switch", "Left Boost Mixer"},
+	{"AUX2 Output Mixer", "AUX1MIX Output Switch", "AUX1 Output Mixer"},
+
+	/* Outputs */
+	{"Right Headphone Out", NULL, "Right Output Mixer"},
+	{"RHP", NULL, "Right Headphone Out"},
+
+	{"Left Headphone Out", NULL, "Left Output Mixer"},
+	{"LHP", NULL, "Left Headphone Out"},
+
+	{"Right Speaker Out", NULL, "Right Output Mixer"},
+	{"RSPK", NULL, "Right Speaker Out"},
+
+	{"Left Speaker Out", NULL, "Left Output Mixer"},
+	{"LSPK", NULL, "Left Speaker Out"},
+
+	{"AUX1 Out", NULL, "AUX1 Output Mixer"},
+	{"AUX2 Out", NULL, "AUX2 Output Mixer"},
+	{"AUXOUT1", NULL, "AUX1 Out"},
+	{"AUXOUT2", NULL, "AUX2 Out"},
+
+	/* Boost Mixer */
+	{"Right ADC", NULL, "PLL", check_mclk_select_pll},
+	{"Left ADC", NULL, "PLL", check_mclk_select_pll},
+
+	{"Right ADC", NULL, "Right Boost Mixer"},
+
+	{"Right Boost Mixer", NULL, "RAUX"},
+	{"Right Boost Mixer", NULL, "Right Capture PGA"},
+	{"Right Boost Mixer", NULL, "R2"},
+
+	{"Left ADC", NULL, "Left Boost Mixer"},
+
+	{"Left Boost Mixer", NULL, "LAUX"},
+	{"Left Boost Mixer", NULL, "Left Capture PGA"},
+	{"Left Boost Mixer", NULL, "L2"},
+
+	/* Input PGA */
+	{"Right Capture PGA", NULL, "Right Input Mixer"},
+	{"Left Capture PGA", NULL, "Left Input Mixer"},
+
+	/* Enable Microphone Power */
+	{"Right Capture PGA", NULL, "Mic Bias"},
+	{"Left Capture PGA", NULL, "Mic Bias"},
+
+	{"Right Input Mixer", "R2 Switch", "R2"},
+	{"Right Input Mixer", "MicN Switch", "RMICN"},
+	{"Right Input Mixer", "MicP Switch", "RMICP"},
+
+	{"Left Input Mixer", "L2 Switch", "L2"},
+	{"Left Input Mixer", "MicN Switch", "LMICN"},
+	{"Left Input Mixer", "MicP Switch", "LMICP"},
+
+	/* Digital Loopback */
+	{"Digital Loopback", "Switch", "Left ADC"},
+	{"Digital Loopback", "Switch", "Right ADC"},
+	{"Left DAC", NULL, "Digital Loopback"},
+	{"Right DAC", NULL, "Digital Loopback"},
+};
+
+static int nau8822_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
+				 unsigned int freq, int dir)
+{
+	struct snd_soc_component *component = dai->component;
+	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
+
+	nau8822->div_id = clk_id;
+	nau8822->sysclk = freq;
+	dev_dbg(component->dev, "master sysclk %dHz, source %s\n", freq,
+		clk_id == NAU8822_CLK_PLL ? "PLL" : "MCLK");
+
+	return 0;
+}
+
+static int nau8822_calc_pll(unsigned int pll_in, unsigned int fs,
+				struct nau8822_pll *pll_param)
+{
+	u64 f2, f2_max, pll_ratio;
+	int i, scal_sel;
+
+	if (pll_in > NAU_PLL_REF_MAX || pll_in < NAU_PLL_REF_MIN)
+		return -EINVAL;
+	f2_max = 0;
+	scal_sel = ARRAY_SIZE(nau8822_mclk_scaler);
+
+	for (i = 0; i < scal_sel; i++) {
+		f2 = 256 * fs * 4 * nau8822_mclk_scaler[i] / 10;
+		if (f2 > NAU_PLL_FREQ_MIN && f2 < NAU_PLL_FREQ_MAX &&
+			f2_max < f2) {
+			f2_max = f2;
+			scal_sel = i;
+		}
+	}
+
+	if (ARRAY_SIZE(nau8822_mclk_scaler) == scal_sel)
+		return -EINVAL;
+	pll_param->mclk_scaler = scal_sel;
+	f2 = f2_max;
+
+	/* Calculate the PLL 4-bit integer input and the PLL 24-bit fractional
+	 * input; round up the 24+4bit.
+	 */
+	pll_ratio = div_u64(f2 << 28, pll_in);
+	pll_param->pre_factor = 0;
+	if (((pll_ratio >> 28) & 0xF) < NAU_PLL_OPTOP_MIN) {
+		pll_ratio <<= 1;
+		pll_param->pre_factor = 1;
+	}
+	pll_param->pll_int = (pll_ratio >> 28) & 0xF;
+	pll_param->pll_frac = ((pll_ratio & 0xFFFFFFF) >> 4);
+
+	return 0;
+}
+
+static int nau8822_config_clkdiv(struct snd_soc_dai *dai, int div, int rate)
+{
+	struct snd_soc_component *component = dai->component;
+	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
+	struct nau8822_pll *pll = &nau8822->pll;
+	int i, sclk, imclk;
+
+	switch (nau8822->div_id) {
+	case NAU8822_CLK_MCLK:
+		/* Configure the master clock prescaler div to make system
+		 * clock to approximate the internal master clock (IMCLK);
+		 * and large or equal to IMCLK.
+		 */
+		div = 0;
+		imclk = rate * 256;
+		for (i = 1; i < ARRAY_SIZE(nau8822_mclk_scaler); i++) {
+			sclk = (nau8822->sysclk * 10) /	nau8822_mclk_scaler[i];
+			if (sclk < imclk)
+				break;
+			div = i;
+		}
+		dev_dbg(component->dev, "master clock prescaler %x for fs %d\n",
+			div, rate);
+
+		/* master clock from MCLK and disable PLL */
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_CLOCKING, NAU8822_MCLKSEL_MASK,
+			(div << NAU8822_MCLKSEL_SFT));
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_CLOCKING, NAU8822_CLKM_MASK,
+			NAU8822_CLKM_MCLK);
+		break;
+
+	case NAU8822_CLK_PLL:
+		/* master clock from PLL and enable PLL */
+		if (pll->mclk_scaler != div) {
+			dev_err(component->dev,
+			"master clock prescaler not meet PLL parameters\n");
+			return -EINVAL;
+		}
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_CLOCKING, NAU8822_MCLKSEL_MASK,
+			(div << NAU8822_MCLKSEL_SFT));
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_CLOCKING, NAU8822_CLKM_MASK,
+			NAU8822_CLKM_PLL);
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int nau8822_set_pll(struct snd_soc_dai *dai, int pll_id, int source,
+				unsigned int freq_in, unsigned int freq_out)
+{
+	struct snd_soc_component *component = dai->component;
+	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
+	struct nau8822_pll *pll_param = &nau8822->pll;
+	int ret, fs;
+
+	fs = freq_out / 256;
+
+	ret = nau8822_calc_pll(freq_in, fs, pll_param);
+	if (ret < 0) {
+		dev_err(component->dev, "Unsupported input clock %d\n",
+			freq_in);
+		return ret;
+	}
+
+	dev_info(component->dev,
+		"pll_int=%x pll_frac=%x mclk_scaler=%x pre_factor=%x\n",
+		pll_param->pll_int, pll_param->pll_frac,
+		pll_param->mclk_scaler, pll_param->pre_factor);
+
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_PLL_N, NAU8822_PLLMCLK_DIV2 | NAU8822_PLLN_MASK,
+		(pll_param->pre_factor ? NAU8822_PLLMCLK_DIV2 : 0) |
+		pll_param->pll_int);
+	snd_soc_component_write(component,
+		NAU8822_REG_PLL_K1, (pll_param->pll_frac >> NAU8822_PLLK1_SFT) &
+		NAU8822_PLLK1_MASK);
+	snd_soc_component_write(component,
+		NAU8822_REG_PLL_K2, (pll_param->pll_frac >> NAU8822_PLLK2_SFT) &
+		NAU8822_PLLK2_MASK);
+	snd_soc_component_write(component,
+		NAU8822_REG_PLL_K3, pll_param->pll_frac & NAU8822_PLLK3_MASK);
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_CLOCKING, NAU8822_MCLKSEL_MASK,
+		pll_param->mclk_scaler << NAU8822_MCLKSEL_SFT);
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_CLOCKING, NAU8822_CLKM_MASK, NAU8822_CLKM_PLL);
+
+	return 0;
+}
+
+static int nau8822_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+	struct snd_soc_component *component = dai->component;
+	u16 ctrl1_val = 0, ctrl2_val = 0;
+
+	dev_dbg(component->dev, "%s\n", __func__);
+
+	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+	case SND_SOC_DAIFMT_CBM_CFM:
+		ctrl2_val |= 1;
+		break;
+	case SND_SOC_DAIFMT_CBS_CFS:
+		ctrl2_val &= ~1;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+	case SND_SOC_DAIFMT_I2S:
+		ctrl1_val |= 0x10;
+		break;
+	case SND_SOC_DAIFMT_RIGHT_J:
+		break;
+	case SND_SOC_DAIFMT_LEFT_J:
+		ctrl1_val |= 0x8;
+		break;
+	case SND_SOC_DAIFMT_DSP_A:
+		ctrl1_val |= 0x18;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+	case SND_SOC_DAIFMT_NB_NF:
+		break;
+	case SND_SOC_DAIFMT_IB_IF:
+		ctrl1_val |= 0x180;
+		break;
+	case SND_SOC_DAIFMT_IB_NF:
+		ctrl1_val |= 0x100;
+		break;
+	case SND_SOC_DAIFMT_NB_IF:
+		ctrl1_val |= 0x80;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_AUDIO_INTERFACE,
+		NAU8822_AIFMT_MASK | NAU8822_LRP_MASK | NAU8822_BCLKP_MASK,
+		ctrl1_val);
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_CLOCKING, NAU8822_CLKIOEN_MASK, ctrl2_val);
+
+	return 0;
+}
+
+static int nau8822_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 nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
+	int val_len = 0, val_rate = 0;
+
+	switch (params_format(params)) {
+	case SNDRV_PCM_FORMAT_S16_LE:
+		break;
+	case SNDRV_PCM_FORMAT_S20_3LE:
+		val_len |= NAU8822_WLEN_20;
+		break;
+	case SNDRV_PCM_FORMAT_S24_LE:
+		val_len |= NAU8822_WLEN_24;
+		break;
+	case SNDRV_PCM_FORMAT_S32_LE:
+		val_len |= NAU8822_WLEN_32;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	switch (params_rate(params)) {
+	case 8000:
+		val_rate |= NAU8822_SMPLR_8K;
+		break;
+	case 11025:
+		val_rate |= NAU8822_SMPLR_12K;
+		break;
+	case 16000:
+		val_rate |= NAU8822_SMPLR_16K;
+		break;
+	case 22050:
+		val_rate |= NAU8822_SMPLR_24K;
+		break;
+	case 32000:
+		val_rate |= NAU8822_SMPLR_32K;
+		break;
+	case 44100:
+	case 48000:
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_AUDIO_INTERFACE, NAU8822_WLEN_MASK, val_len);
+	snd_soc_component_update_bits(component,
+		NAU8822_REG_ADDITIONAL_CONTROL, NAU8822_SMPLR_MASK, val_rate);
+
+	/* If the master clock is from MCLK, provide the runtime FS for driver
+	 * to get the master clock prescaler configuration.
+	 */
+	if (nau8822->div_id == NAU8822_CLK_MCLK)
+		nau8822_config_clkdiv(dai, 0, params_rate(params));
+
+	return 0;
+}
+
+static int nau8822_mute(struct snd_soc_dai *dai, int mute)
+{
+	struct snd_soc_component *component = dai->component;
+
+	dev_dbg(component->dev, "%s: %d\n", __func__, mute);
+
+	if (mute)
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_DAC_CONTROL, 0x40, 0x40);
+	else
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_DAC_CONTROL, 0x40, 0);
+
+	return 0;
+}
+
+static int nau8822_set_bias_level(struct snd_soc_component *component,
+				 enum snd_soc_bias_level level)
+{
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+	case SND_SOC_BIAS_PREPARE:
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_POWER_MANAGEMENT_1,
+			NAU8822_REFIMP_MASK, NAU8822_REFIMP_80K);
+		break;
+
+	case SND_SOC_BIAS_STANDBY:
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_POWER_MANAGEMENT_1,
+			NAU8822_IOBUF_EN | NAU8822_ABIAS_EN,
+			NAU8822_IOBUF_EN | NAU8822_ABIAS_EN);
+
+		if (snd_soc_component_get_bias_level(component) ==
+			SND_SOC_BIAS_OFF) {
+			snd_soc_component_update_bits(component,
+				NAU8822_REG_POWER_MANAGEMENT_1,
+				NAU8822_REFIMP_MASK, NAU8822_REFIMP_3K);
+			mdelay(100);
+		}
+		snd_soc_component_update_bits(component,
+			NAU8822_REG_POWER_MANAGEMENT_1,
+			NAU8822_REFIMP_MASK, NAU8822_REFIMP_300K);
+		break;
+
+	case SND_SOC_BIAS_OFF:
+		snd_soc_component_write(component,
+			NAU8822_REG_POWER_MANAGEMENT_1, 0);
+		snd_soc_component_write(component,
+			NAU8822_REG_POWER_MANAGEMENT_2, 0);
+		snd_soc_component_write(component,
+			NAU8822_REG_POWER_MANAGEMENT_3, 0);
+		break;
+	}
+
+	dev_dbg(component->dev, "%s: %d\n", __func__, level);
+
+	return 0;
+}
+
+#define NAU8822_RATES (SNDRV_PCM_RATE_8000_48000)
+
+#define NAU8822_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
+	SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops nau8822_dai_ops = {
+	.hw_params	= nau8822_hw_params,
+	.digital_mute	= nau8822_mute,
+	.set_fmt	= nau8822_set_dai_fmt,
+	.set_sysclk	= nau8822_set_dai_sysclk,
+	.set_pll	= nau8822_set_pll,
+};
+
+static struct snd_soc_dai_driver nau8822_dai = {
+	.name = "nau8822-hifi",
+	.playback = {
+		.stream_name = "Playback",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = NAU8822_RATES,
+		.formats = NAU8822_FORMATS,
+	},
+	.capture = {
+		.stream_name = "Capture",
+		.channels_min = 1,
+		.channels_max = 2,
+		.rates = NAU8822_RATES,
+		.formats = NAU8822_FORMATS,
+	},
+	.ops = &nau8822_dai_ops,
+	.symmetric_rates = 1,
+};
+
+static int nau8822_suspend(struct snd_soc_component *component)
+{
+	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
+
+	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_OFF);
+
+	regcache_mark_dirty(nau8822->regmap);
+
+	return 0;
+}
+
+static int nau8822_resume(struct snd_soc_component *component)
+{
+	struct nau8822 *nau8822 = snd_soc_component_get_drvdata(component);
+
+	regcache_sync(nau8822->regmap);
+
+	snd_soc_component_force_bias_level(component, SND_SOC_BIAS_STANDBY);
+
+	return 0;
+}
+
+/*
+ * These registers contain an "update" bit - bit 8. This means, for example,
+ * that one can write new DAC digital volume for both channels, but only when
+ * the update bit is set, will also the volume be updated - simultaneously for
+ * both channels.
+ */
+static const int update_reg[] = {
+	NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME,
+	NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME,
+	NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME,
+	NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME,
+	NAU8822_REG_LEFT_INP_PGA_CONTROL,
+	NAU8822_REG_RIGHT_INP_PGA_CONTROL,
+	NAU8822_REG_LHP_VOLUME,
+	NAU8822_REG_RHP_VOLUME,
+	NAU8822_REG_LSPKOUT_VOLUME,
+	NAU8822_REG_RSPKOUT_VOLUME,
+};
+
+static int nau8822_probe(struct snd_soc_component *component)
+{
+	int i;
+
+	/*
+	 * Set the update bit in all registers, that have one. This way all
+	 * writes to those registers will also cause the update bit to be
+	 * written.
+	 */
+	for (i = 0; i < ARRAY_SIZE(update_reg); i++)
+		snd_soc_component_update_bits(component,
+			update_reg[i], 0x100, 0x100);
+
+	return 0;
+}
+
+static const struct snd_soc_component_driver soc_component_dev_nau8822 = {
+	.probe				= nau8822_probe,
+	.suspend			= nau8822_suspend,
+	.resume				= nau8822_resume,
+	.set_bias_level			= nau8822_set_bias_level,
+	.controls			= nau8822_snd_controls,
+	.num_controls			= ARRAY_SIZE(nau8822_snd_controls),
+	.dapm_widgets			= nau8822_dapm_widgets,
+	.num_dapm_widgets		= ARRAY_SIZE(nau8822_dapm_widgets),
+	.dapm_routes			= nau8822_dapm_routes,
+	.num_dapm_routes		= ARRAY_SIZE(nau8822_dapm_routes),
+	.idle_bias_on			= 1,
+	.use_pmdown_time		= 1,
+	.endianness			= 1,
+	.non_legacy_dai_naming		= 1,
+};
+
+static const struct regmap_config nau8822_regmap_config = {
+	.reg_bits = 7,
+	.val_bits = 9,
+
+	.max_register = NAU8822_REG_MAX_REGISTER,
+	.volatile_reg = nau8822_volatile,
+
+	.readable_reg = nau8822_readable_reg,
+	.writeable_reg = nau8822_writeable_reg,
+
+	.cache_type = REGCACHE_RBTREE,
+	.reg_defaults = nau8822_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(nau8822_reg_defaults),
+};
+
+static int nau8822_i2c_probe(struct i2c_client *i2c,
+			    const struct i2c_device_id *id)
+{
+	struct device *dev = &i2c->dev;
+	struct nau8822 *nau8822 = dev_get_platdata(dev);
+	int ret;
+
+	if (!nau8822) {
+		nau8822 = devm_kzalloc(dev, sizeof(*nau8822), GFP_KERNEL);
+		if (nau8822 == NULL)
+			return -ENOMEM;
+	}
+	i2c_set_clientdata(i2c, nau8822);
+
+	nau8822->regmap = devm_regmap_init_i2c(i2c, &nau8822_regmap_config);
+	if (IS_ERR(nau8822->regmap)) {
+		ret = PTR_ERR(nau8822->regmap);
+		dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
+		return ret;
+	}
+	nau8822->dev = dev;
+
+	/* Reset the codec */
+	ret = regmap_write(nau8822->regmap, NAU8822_REG_RESET, 0x00);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to issue reset: %d\n", ret);
+		return ret;
+	}
+
+	ret = devm_snd_soc_register_component(dev, &soc_component_dev_nau8822,
+						&nau8822_dai, 1);
+	if (ret != 0) {
+		dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static const struct i2c_device_id nau8822_i2c_id[] = {
+	{ "nau8822", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, nau8822_i2c_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id nau8822_of_match[] = {
+	{ .compatible = "nuvoton,nau8822", },
+	{ }
+};
+MODULE_DEVICE_TABLE(of, nau8822_of_match);
+#endif
+
+static struct i2c_driver nau8822_i2c_driver = {
+	.driver = {
+		.name = "nau8822",
+		.of_match_table = of_match_ptr(nau8822_of_match),
+	},
+	.probe =    nau8822_i2c_probe,
+	.id_table = nau8822_i2c_id,
+};
+module_i2c_driver(nau8822_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC NAU8822 codec driver");
+MODULE_AUTHOR("David Lin <[e-mail]>");
+MODULE_LICENSE("GPL v2");

sound/soc/codecs/nau8822.h

···
+/*
+ * nau8822.h  --  NAU8822 Soc Audio Codec driver
+ *
+ * Author: David Lin <[e-mail]>
+ * Co-author: John Hsu <[e-mail]>
+ * Co-author: Seven Li <[e-mail]>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __NAU8822_H__
+#define __NAU8822_H__
+
+#define NAU8822_REG_RESET			0x00
+#define NAU8822_REG_POWER_MANAGEMENT_1		0x01
+#define NAU8822_REG_POWER_MANAGEMENT_2		0x02
+#define NAU8822_REG_POWER_MANAGEMENT_3		0x03
+#define NAU8822_REG_AUDIO_INTERFACE		0x04
+#define NAU8822_REG_COMPANDING_CONTROL		0x05
+#define NAU8822_REG_CLOCKING			0x06
+#define NAU8822_REG_ADDITIONAL_CONTROL		0x07
+#define NAU8822_REG_GPIO_CONTROL		0x08
+#define NAU8822_REG_JACK_DETECT_CONTROL_1	0x09
+#define NAU8822_REG_DAC_CONTROL			0x0A
+#define NAU8822_REG_LEFT_DAC_DIGITAL_VOLUME	0x0B
+#define NAU8822_REG_RIGHT_DAC_DIGITAL_VOLUME	0x0C
+#define NAU8822_REG_JACK_DETECT_CONTROL_2	0x0D
+#define NAU8822_REG_ADC_CONTROL			0x0E
+#define NAU8822_REG_LEFT_ADC_DIGITAL_VOLUME	0x0F
+#define NAU8822_REG_RIGHT_ADC_DIGITAL_VOLUME	0x10
+#define NAU8822_REG_EQ1				0x12
+#define NAU8822_REG_EQ2				0x13
+#define NAU8822_REG_EQ3				0x14
+#define NAU8822_REG_EQ4				0x15
+#define NAU8822_REG_EQ5				0x16
+#define NAU8822_REG_DAC_LIMITER_1		0x18
+#define NAU8822_REG_DAC_LIMITER_2		0x19
+#define NAU8822_REG_NOTCH_FILTER_1		0x1B
+#define NAU8822_REG_NOTCH_FILTER_2		0x1C
+#define NAU8822_REG_NOTCH_FILTER_3		0x1D
+#define NAU8822_REG_NOTCH_FILTER_4		0x1E
+#define NAU8822_REG_ALC_CONTROL_1		0x20
+#define NAU8822_REG_ALC_CONTROL_2		0x21
+#define NAU8822_REG_ALC_CONTROL_3		0x22
+#define NAU8822_REG_NOISE_GATE			0x23
+#define NAU8822_REG_PLL_N			0x24
+#define NAU8822_REG_PLL_K1			0x25
+#define NAU8822_REG_PLL_K2			0x26
+#define NAU8822_REG_PLL_K3			0x27
+#define NAU8822_REG_3D_CONTROL			0x29
+#define NAU8822_REG_RIGHT_SPEAKER_CONTROL	0x2B
+#define NAU8822_REG_INPUT_CONTROL		0x2C
+#define NAU8822_REG_LEFT_INP_PGA_CONTROL	0x2D
+#define NAU8822_REG_RIGHT_INP_PGA_CONTROL	0x2E
+#define NAU8822_REG_LEFT_ADC_BOOST_CONTROL	0x2F
+#define NAU8822_REG_RIGHT_ADC_BOOST_CONTROL	0x30
+#define NAU8822_REG_OUTPUT_CONTROL		0x31
+#define NAU8822_REG_LEFT_MIXER_CONTROL		0x32
+#define NAU8822_REG_RIGHT_MIXER_CONTROL		0x33
+#define NAU8822_REG_LHP_VOLUME			0x34
+#define NAU8822_REG_RHP_VOLUME			0x35
+#define NAU8822_REG_LSPKOUT_VOLUME		0x36
+#define NAU8822_REG_RSPKOUT_VOLUME		0x37
+#define NAU8822_REG_AUX2_MIXER			0x38
+#define NAU8822_REG_AUX1_MIXER			0x39
+#define NAU8822_REG_POWER_MANAGEMENT_4		0x3A
+#define NAU8822_REG_LEFT_TIME_SLOT		0x3B
+#define NAU8822_REG_MISC			0x3C
+#define NAU8822_REG_RIGHT_TIME_SLOT		0x3D
+#define NAU8822_REG_DEVICE_REVISION		0x3E
+#define NAU8822_REG_DEVICE_ID			0x3F
+#define NAU8822_REG_DAC_DITHER			0x41
+#define NAU8822_REG_ALC_ENHANCE_1		0x46
+#define NAU8822_REG_ALC_ENHANCE_2		0x47
+#define NAU8822_REG_192KHZ_SAMPLING		0x48
+#define NAU8822_REG_MISC_CONTROL		0x49
+#define NAU8822_REG_INPUT_TIEOFF		0x4A
+#define NAU8822_REG_POWER_REDUCTION		0x4B
+#define NAU8822_REG_AGC_PEAK2PEAK		0x4C
+#define NAU8822_REG_AGC_PEAK_DETECT		0x4D
+#define NAU8822_REG_AUTOMUTE_CONTROL		0x4E
+#define NAU8822_REG_OUTPUT_TIEOFF		0x4F
+#define NAU8822_REG_MAX_REGISTER		NAU8822_REG_OUTPUT_TIEOFF
+
+/* NAU8822_REG_POWER_MANAGEMENT_1 (0x1) */
+#define NAU8822_REFIMP_MASK			0x3
+#define NAU8822_REFIMP_80K			0x1
+#define NAU8822_REFIMP_300K			0x2
+#define NAU8822_REFIMP_3K			0x3
+#define NAU8822_IOBUF_EN			(0x1 << 2)
+#define NAU8822_ABIAS_EN			(0x1 << 3)
+
+/* NAU8822_REG_AUDIO_INTERFACE (0x4) */
+#define NAU8822_AIFMT_MASK			(0x3 << 3)
+#define NAU8822_WLEN_MASK			(0x3 << 5)
+#define NAU8822_WLEN_20				(0x1 << 5)
+#define NAU8822_WLEN_24				(0x2 << 5)
+#define NAU8822_WLEN_32				(0x3 << 5)
+#define NAU8822_LRP_MASK			(0x1 << 7)
+#define NAU8822_BCLKP_MASK			(0x1 << 8)
+
+/* NAU8822_REG_COMPANDING_CONTROL (0x5) */
+#define NAU8822_ADDAP_SFT			0
+#define NAU8822_ADCCM_SFT			1
+#define NAU8822_DACCM_SFT			3
+
+/* NAU8822_REG_CLOCKING (0x6) */
+#define NAU8822_CLKIOEN_MASK			0x1
+#define NAU8822_MCLKSEL_SFT			5
+#define NAU8822_MCLKSEL_MASK			(0x7 << 5)
+#define NAU8822_BCLKSEL_SFT			2
+#define NAU8822_BCLKSEL_MASK			(0x7 << 2)
+#define NAU8822_CLKM_MASK			(0x1 << 8)
+#define NAU8822_CLKM_MCLK			(0x0 << 8)
+#define NAU8822_CLKM_PLL			(0x1 << 8)
+
+/* NAU8822_REG_ADDITIONAL_CONTROL (0x08) */
+#define NAU8822_SMPLR_SFT			1
+#define NAU8822_SMPLR_MASK			(0x7 << 1)
+#define NAU8822_SMPLR_48K			(0x0 << 1)
+#define NAU8822_SMPLR_32K			(0x1 << 1)
+#define NAU8822_SMPLR_24K			(0x2 << 1)
+#define NAU8822_SMPLR_16K			(0x3 << 1)
+#define NAU8822_SMPLR_12K			(0x4 << 1)
+#define NAU8822_SMPLR_8K			(0x5 << 1)
+
+/* NAU8822_REG_EQ1 (0x12) */
+#define NAU8822_EQ1GC_SFT			0
+#define NAU8822_EQ1CF_SFT			5
+#define NAU8822_EQM_SFT				8
+
+/* NAU8822_REG_EQ2 (0x13) */
+#define NAU8822_EQ2GC_SFT			0
+#define NAU8822_EQ2CF_SFT			5
+#define NAU8822_EQ2BW_SFT			8
+
+/* NAU8822_REG_EQ3 (0x14) */
+#define NAU8822_EQ3GC_SFT			0
+#define NAU8822_EQ3CF_SFT			5
+#define NAU8822_EQ3BW_SFT			8
+
+/* NAU8822_REG_EQ4 (0x15) */
+#define NAU8822_EQ4GC_SFT			0
+#define NAU8822_EQ4CF_SFT			5
+#define NAU8822_EQ4BW_SFT			8
+
+/* NAU8822_REG_EQ5 (0x16) */
+#define NAU8822_EQ5GC_SFT			0
+#define NAU8822_EQ5CF_SFT			5
+
+/* NAU8822_REG_ALC_CONTROL_1 (0x20) */
+#define NAU8822_ALCMINGAIN_SFT			0
+#define NAU8822_ALCMXGAIN_SFT			3
+#define NAU8822_ALCEN_SFT			7
+
+/* NAU8822_REG_ALC_CONTROL_2 (0x21) */
+#define NAU8822_ALCSL_SFT			0
+#define NAU8822_ALCHT_SFT			4
+
+/* NAU8822_REG_ALC_CONTROL_3 (0x22) */
+#define NAU8822_ALCATK_SFT			0
+#define NAU8822_ALCDCY_SFT			4
+#define NAU8822_ALCM_SFT			8
+
+/* NAU8822_REG_PLL_N (0x24) */
+#define NAU8822_PLLMCLK_DIV2			(0x1 << 4)
+#define NAU8822_PLLN_MASK			0xF
+
+#define NAU8822_PLLK1_SFT			18
+#define NAU8822_PLLK1_MASK			0x3F
+
+/* NAU8822_REG_PLL_K2 (0x26) */
+#define NAU8822_PLLK2_SFT			9
+#define NAU8822_PLLK2_MASK			0x1FF
+
+/* NAU8822_REG_PLL_K3 (0x27) */
+#define NAU8822_PLLK3_MASK			0x1FF
+
+/* System Clock Source */
+enum {
+	NAU8822_CLK_MCLK,
+	NAU8822_CLK_PLL,
+};
+
+struct nau8822_pll {
+	int pre_factor;
+	int mclk_scaler;
+	int pll_frac;
+	int pll_int;
+};
+
+/* Codec Private Data */
+struct nau8822 {
+	struct device *dev;
+	struct regmap *regmap;
+	int mclk_idx;
+	struct nau8822_pll pll;
+	int sysclk;
+	int div_id;
+};
+
+#endif	/* __NAU8822_H__ */