text: /*
   * wm8991.c  --  WM8991 ALSA Soc Audio driver
   *
   * Copyright 2007-2010 Wolfson Microelectronics PLC.
   * Author: Graeme Gregory
   *         Graeme.Gregory@wolfsonmicro.com
   *
   *  This program is free software; you can redistribute  it and/or modify it
   *  under  the terms of  the GNU General  Public License as published by the
   *  Free Software Foundation;  either version 2 of the  License, or (at your
   *  option) any later version.
   */
  
  #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/soc-dapm.h>
  #include <sound/initval.h>
  #include <sound/tlv.h>
  #include <asm/div64.h>
  
  #include "wm8991.h"
  
  struct wm8991_priv {
  	struct regmap *regmap;
  	unsigned int pcmclk;
  };
  
  static const struct reg_default wm8991_reg_defaults[] = {
  	{  1, 0x0000 },     /* R1  - Power Management (1) */
  	{  2, 0x6000 },     /* R2  - Power Management (2) */
  	{  3, 0x0000 },     /* R3  - Power Management (3) */
  	{  4, 0x4050 },     /* R4  - Audio Interface (1) */
  	{  5, 0x4000 },     /* R5  - Audio Interface (2) */
  	{  6, 0x01C8 },     /* R6  - Clocking (1) */
  	{  7, 0x0000 },     /* R7  - Clocking (2) */
  	{  8, 0x0040 },     /* R8  - Audio Interface (3) */
  	{  9, 0x0040 },     /* R9  - Audio Interface (4) */
  	{ 10, 0x0004 },     /* R10 - DAC CTRL */
  	{ 11, 0x00C0 },     /* R11 - Left DAC Digital Volume */
  	{ 12, 0x00C0 },     /* R12 - Right DAC Digital Volume */
  	{ 13, 0x0000 },     /* R13 - Digital Side Tone */
  	{ 14, 0x0100 },     /* R14 - ADC CTRL */
  	{ 15, 0x00C0 },     /* R15 - Left ADC Digital Volume */
  	{ 16, 0x00C0 },     /* R16 - Right ADC Digital Volume */
  
  	{ 18, 0x0000 },     /* R18 - GPIO CTRL 1 */
  	{ 19, 0x1000 },     /* R19 - GPIO1 & GPIO2 */
  	{ 20, 0x1010 },     /* R20 - GPIO3 & GPIO4 */
  	{ 21, 0x1010 },     /* R21 - GPIO5 & GPIO6 */
  	{ 22, 0x8000 },     /* R22 - GPIOCTRL 2 */
  	{ 23, 0x0800 },     /* R23 - GPIO_POL */
  	{ 24, 0x008B },     /* R24 - Left Line Input 1&2 Volume */
  	{ 25, 0x008B },     /* R25 - Left Line Input 3&4 Volume */
  	{ 26, 0x008B },     /* R26 - Right Line Input 1&2 Volume */
  	{ 27, 0x008B },     /* R27 - Right Line Input 3&4 Volume */
  	{ 28, 0x0000 },     /* R28 - Left Output Volume */
  	{ 29, 0x0000 },     /* R29 - Right Output Volume */
  	{ 30, 0x0066 },     /* R30 - Line Outputs Volume */
  	{ 31, 0x0022 },     /* R31 - Out3/4 Volume */
  	{ 32, 0x0079 },     /* R32 - Left OPGA Volume */
  	{ 33, 0x0079 },     /* R33 - Right OPGA Volume */
  	{ 34, 0x0003 },     /* R34 - Speaker Volume */
  	{ 35, 0x0003 },     /* R35 - ClassD1 */
  
  	{ 37, 0x0100 },     /* R37 - ClassD3 */
  
  	{ 39, 0x0000 },     /* R39 - Input Mixer1 */
  	{ 40, 0x0000 },     /* R40 - Input Mixer2 */
  	{ 41, 0x0000 },     /* R41 - Input Mixer3 */
  	{ 42, 0x0000 },     /* R42 - Input Mixer4 */
  	{ 43, 0x0000 },     /* R43 - Input Mixer5 */
  	{ 44, 0x0000 },     /* R44 - Input Mixer6 */
  	{ 45, 0x0000 },     /* R45 - Output Mixer1 */
  	{ 46, 0x0000 },     /* R46 - Output Mixer2 */
  	{ 47, 0x0000 },     /* R47 - Output Mixer3 */
  	{ 48, 0x0000 },     /* R48 - Output Mixer4 */
  	{ 49, 0x0000 },     /* R49 - Output Mixer5 */
  	{ 50, 0x0000 },     /* R50 - Output Mixer6 */
  	{ 51, 0x0180 },     /* R51 - Out3/4 Mixer */
  	{ 52, 0x0000 },     /* R52 - Line Mixer1 */
  	{ 53, 0x0000 },     /* R53 - Line Mixer2 */
  	{ 54, 0x0000 },     /* R54 - Speaker Mixer */
  	{ 55, 0x0000 },     /* R55 - Additional Control */
  	{ 56, 0x0000 },     /* R56 - AntiPOP1 */
  	{ 57, 0x0000 },     /* R57 - AntiPOP2 */
  	{ 58, 0x0000 },     /* R58 - MICBIAS */
  
  	{ 60, 0x0008 },     /* R60 - PLL1 */
  	{ 61, 0x0031 },     /* R61 - PLL2 */
  	{ 62, 0x0026 },     /* R62 - PLL3 */
  };
  
  static bool wm8991_volatile(struct device *dev, unsigned int reg)
  {
  	switch (reg) {
  	case WM8991_RESET:
  		return true;
  	default:
  		return false;
  	}
  }
  
  static const unsigned int rec_mix_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 7, TLV_DB_LINEAR_ITEM(-1500, 600),
  };
  
  static const unsigned int in_pga_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 0x1F, TLV_DB_LINEAR_ITEM(-1650, 3000),
  };
  
  static const unsigned int out_mix_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 7, TLV_DB_LINEAR_ITEM(0, -2100),
  };
  
  static const unsigned int out_pga_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 127, TLV_DB_LINEAR_ITEM(-7300, 600),
  };
  
  static const unsigned int out_omix_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 7, TLV_DB_LINEAR_ITEM(-600, 0),
  };
  
  static const unsigned int out_dac_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 255, TLV_DB_LINEAR_ITEM(-7163, 0),
  };
  
  static const unsigned int in_adc_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 255, TLV_DB_LINEAR_ITEM(-7163, 1763),
  };
  
  static const unsigned int out_sidetone_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 31, TLV_DB_LINEAR_ITEM(-3600, 0),
  };
  
  static int wm899x_outpga_put_volsw_vu(struct snd_kcontrol *kcontrol,
  				      struct snd_ctl_elem_value *ucontrol)
  {
  	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
  	int reg = kcontrol->private_value & 0xff;
  	int ret;
  	u16 val;
  
  	ret = snd_soc_put_volsw(kcontrol, ucontrol);
  	if (ret < 0)
  		return ret;
  
  	/* now hit the volume update bits (always bit 8) */
  	val = snd_soc_read(codec, reg);
  	return snd_soc_write(codec, reg, val | 0x0100);
  }
  
  static const char *wm8991_digital_sidetone[] =
  {"None", "Left ADC", "Right ADC", "Reserved"};
  
  static SOC_ENUM_SINGLE_DECL(wm8991_left_digital_sidetone_enum,
  			    WM8991_DIGITAL_SIDE_TONE,
  			    WM8991_ADC_TO_DACL_SHIFT,
  			    wm8991_digital_sidetone);
  
  static SOC_ENUM_SINGLE_DECL(wm8991_right_digital_sidetone_enum,
  			    WM8991_DIGITAL_SIDE_TONE,
  			    WM8991_ADC_TO_DACR_SHIFT,
  			    wm8991_digital_sidetone);
  
  static const char *wm8991_adcmode[] =
  {"Hi-fi mode", "Voice mode 1", "Voice mode 2", "Voice mode 3"};
  
  static SOC_ENUM_SINGLE_DECL(wm8991_right_adcmode_enum,
  			    WM8991_ADC_CTRL,
  			    WM8991_ADC_HPF_CUT_SHIFT,
  			    wm8991_adcmode);
  
  static const struct snd_kcontrol_new wm8991_snd_controls[] = {
  	/* INMIXL */
  	SOC_SINGLE("LIN12 PGA Boost", WM8991_INPUT_MIXER3, WM8991_L12MNBST_BIT, 1, 0),
  	SOC_SINGLE("LIN34 PGA Boost", WM8991_INPUT_MIXER3, WM8991_L34MNBST_BIT, 1, 0),
  	/* INMIXR */
  	SOC_SINGLE("RIN12 PGA Boost", WM8991_INPUT_MIXER3, WM8991_R12MNBST_BIT, 1, 0),
  	SOC_SINGLE("RIN34 PGA Boost", WM8991_INPUT_MIXER3, WM8991_R34MNBST_BIT, 1, 0),
  
  	/* LOMIX */
  	SOC_SINGLE_TLV("LOMIX LIN3 Bypass Volume", WM8991_OUTPUT_MIXER3,
  		WM8991_LLI3LOVOL_SHIFT, WM8991_LLI3LOVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("LOMIX RIN12 PGA Bypass Volume", WM8991_OUTPUT_MIXER3,
  		WM8991_LR12LOVOL_SHIFT, WM8991_LR12LOVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("LOMIX LIN12 PGA Bypass Volume", WM8991_OUTPUT_MIXER3,
  		WM8991_LL12LOVOL_SHIFT, WM8991_LL12LOVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("LOMIX RIN3 Bypass Volume", WM8991_OUTPUT_MIXER5,
  		WM8991_LRI3LOVOL_SHIFT, WM8991_LRI3LOVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("LOMIX AINRMUX Bypass Volume", WM8991_OUTPUT_MIXER5,
  		WM8991_LRBLOVOL_SHIFT, WM8991_LRBLOVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("LOMIX AINLMUX Bypass Volume", WM8991_OUTPUT_MIXER5,
  		WM8991_LRBLOVOL_SHIFT, WM8991_LRBLOVOL_MASK, 1, out_mix_tlv),
  
  	/* ROMIX */
  	SOC_SINGLE_TLV("ROMIX RIN3 Bypass Volume", WM8991_OUTPUT_MIXER4,
  		WM8991_RRI3ROVOL_SHIFT, WM8991_RRI3ROVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("ROMIX LIN12 PGA Bypass Volume", WM8991_OUTPUT_MIXER4,
  		WM8991_RL12ROVOL_SHIFT, WM8991_RL12ROVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("ROMIX RIN12 PGA Bypass Volume", WM8991_OUTPUT_MIXER4,
  		WM8991_RR12ROVOL_SHIFT, WM8991_RR12ROVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("ROMIX LIN3 Bypass Volume", WM8991_OUTPUT_MIXER6,
  		WM8991_RLI3ROVOL_SHIFT, WM8991_RLI3ROVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("ROMIX AINLMUX Bypass Volume", WM8991_OUTPUT_MIXER6,
  		WM8991_RLBROVOL_SHIFT, WM8991_RLBROVOL_MASK, 1, out_mix_tlv),
  	SOC_SINGLE_TLV("ROMIX AINRMUX Bypass Volume", WM8991_OUTPUT_MIXER6,
  		WM8991_RRBROVOL_SHIFT, WM8991_RRBROVOL_MASK, 1, out_mix_tlv),
  
  	/* LOUT */
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("LOUT Volume", WM8991_LEFT_OUTPUT_VOLUME,
  		WM8991_LOUTVOL_SHIFT, WM8991_LOUTVOL_MASK, 0, out_pga_tlv),
  	SOC_SINGLE("LOUT ZC", WM8991_LEFT_OUTPUT_VOLUME, WM8991_LOZC_BIT, 1, 0),
  
  	/* ROUT */
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("ROUT Volume", WM8991_RIGHT_OUTPUT_VOLUME,
  		WM8991_ROUTVOL_SHIFT, WM8991_ROUTVOL_MASK, 0, out_pga_tlv),
  	SOC_SINGLE("ROUT ZC", WM8991_RIGHT_OUTPUT_VOLUME, WM8991_ROZC_BIT, 1, 0),
  
  	/* LOPGA */
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("LOPGA Volume", WM8991_LEFT_OPGA_VOLUME,
  		WM8991_LOPGAVOL_SHIFT, WM8991_LOPGAVOL_MASK, 0, out_pga_tlv),
  	SOC_SINGLE("LOPGA ZC Switch", WM8991_LEFT_OPGA_VOLUME,
  		WM8991_LOPGAZC_BIT, 1, 0),
  
  	/* ROPGA */
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("ROPGA Volume", WM8991_RIGHT_OPGA_VOLUME,
  		WM8991_ROPGAVOL_SHIFT, WM8991_ROPGAVOL_MASK, 0, out_pga_tlv),
  	SOC_SINGLE("ROPGA ZC Switch", WM8991_RIGHT_OPGA_VOLUME,
  		WM8991_ROPGAZC_BIT, 1, 0),
  
  	SOC_SINGLE("LON Mute Switch", WM8991_LINE_OUTPUTS_VOLUME,
  		WM8991_LONMUTE_BIT, 1, 0),
  	SOC_SINGLE("LOP Mute Switch", WM8991_LINE_OUTPUTS_VOLUME,
  		WM8991_LOPMUTE_BIT, 1, 0),
  	SOC_SINGLE("LOP Attenuation Switch", WM8991_LINE_OUTPUTS_VOLUME,
  		WM8991_LOATTN_BIT, 1, 0),
  	SOC_SINGLE("RON Mute Switch", WM8991_LINE_OUTPUTS_VOLUME,
  		WM8991_RONMUTE_BIT, 1, 0),
  	SOC_SINGLE("ROP Mute Switch", WM8991_LINE_OUTPUTS_VOLUME,
  		WM8991_ROPMUTE_BIT, 1, 0),
  	SOC_SINGLE("ROP Attenuation Switch", WM8991_LINE_OUTPUTS_VOLUME,
  		WM8991_ROATTN_BIT, 1, 0),
  
  	SOC_SINGLE("OUT3 Mute Switch", WM8991_OUT3_4_VOLUME,
  		WM8991_OUT3MUTE_BIT, 1, 0),
  	SOC_SINGLE("OUT3 Attenuation Switch", WM8991_OUT3_4_VOLUME,
  		WM8991_OUT3ATTN_BIT, 1, 0),
  
  	SOC_SINGLE("OUT4 Mute Switch", WM8991_OUT3_4_VOLUME,
  		WM8991_OUT4MUTE_BIT, 1, 0),
  	SOC_SINGLE("OUT4 Attenuation Switch", WM8991_OUT3_4_VOLUME,
  		WM8991_OUT4ATTN_BIT, 1, 0),
  
  	SOC_SINGLE("Speaker Mode Switch", WM8991_CLASSD1,
  		WM8991_CDMODE_BIT, 1, 0),
  
  	SOC_SINGLE("Speaker Output Attenuation Volume", WM8991_SPEAKER_VOLUME,
  		WM8991_SPKVOL_SHIFT, WM8991_SPKVOL_MASK, 0),
  	SOC_SINGLE("Speaker DC Boost Volume", WM8991_CLASSD3,
  		WM8991_DCGAIN_SHIFT, WM8991_DCGAIN_MASK, 0),
  	SOC_SINGLE("Speaker AC Boost Volume", WM8991_CLASSD3,
  		WM8991_ACGAIN_SHIFT, WM8991_ACGAIN_MASK, 0),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("Left DAC Digital Volume",
  		WM8991_LEFT_DAC_DIGITAL_VOLUME,
  		WM8991_DACL_VOL_SHIFT,
  		WM8991_DACL_VOL_MASK,
  		0,
  		out_dac_tlv),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("Right DAC Digital Volume",
  		WM8991_RIGHT_DAC_DIGITAL_VOLUME,
  		WM8991_DACR_VOL_SHIFT,
  		WM8991_DACR_VOL_MASK,
  		0,
  		out_dac_tlv),
  
  	SOC_ENUM("Left Digital Sidetone", wm8991_left_digital_sidetone_enum),
  	SOC_ENUM("Right Digital Sidetone", wm8991_right_digital_sidetone_enum),
  
  	SOC_SINGLE_TLV("Left Digital Sidetone Volume", WM8991_DIGITAL_SIDE_TONE,
  		WM8991_ADCL_DAC_SVOL_SHIFT, WM8991_ADCL_DAC_SVOL_MASK, 0,
  		out_sidetone_tlv),
  	SOC_SINGLE_TLV("Right Digital Sidetone Volume", WM8991_DIGITAL_SIDE_TONE,
  		WM8991_ADCR_DAC_SVOL_SHIFT, WM8991_ADCR_DAC_SVOL_MASK, 0,
  		out_sidetone_tlv),
  
  	SOC_SINGLE("ADC Digital High Pass Filter Switch", WM8991_ADC_CTRL,
  		WM8991_ADC_HPF_ENA_BIT, 1, 0),
  
  	SOC_ENUM("ADC HPF Mode", wm8991_right_adcmode_enum),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("Left ADC Digital Volume",
  		WM8991_LEFT_ADC_DIGITAL_VOLUME,
  		WM8991_ADCL_VOL_SHIFT,
  		WM8991_ADCL_VOL_MASK,
  		0,
  		in_adc_tlv),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("Right ADC Digital Volume",
  		WM8991_RIGHT_ADC_DIGITAL_VOLUME,
  		WM8991_ADCR_VOL_SHIFT,
  		WM8991_ADCR_VOL_MASK,
  		0,
  		in_adc_tlv),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("LIN12 Volume",
  		WM8991_LEFT_LINE_INPUT_1_2_VOLUME,
  		WM8991_LIN12VOL_SHIFT,
  		WM8991_LIN12VOL_MASK,
  		0,
  		in_pga_tlv),
  
  	SOC_SINGLE("LIN12 ZC Switch", WM8991_LEFT_LINE_INPUT_1_2_VOLUME,
  		WM8991_LI12ZC_BIT, 1, 0),
  
  	SOC_SINGLE("LIN12 Mute Switch", WM8991_LEFT_LINE_INPUT_1_2_VOLUME,
  		WM8991_LI12MUTE_BIT, 1, 0),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("LIN34 Volume",
  		WM8991_LEFT_LINE_INPUT_3_4_VOLUME,
  		WM8991_LIN34VOL_SHIFT,
  		WM8991_LIN34VOL_MASK,
  		0,
  		in_pga_tlv),
  
  	SOC_SINGLE("LIN34 ZC Switch", WM8991_LEFT_LINE_INPUT_3_4_VOLUME,
  		WM8991_LI34ZC_BIT, 1, 0),
  
  	SOC_SINGLE("LIN34 Mute Switch", WM8991_LEFT_LINE_INPUT_3_4_VOLUME,
  		WM8991_LI34MUTE_BIT, 1, 0),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("RIN12 Volume",
  		WM8991_RIGHT_LINE_INPUT_1_2_VOLUME,
  		WM8991_RIN12VOL_SHIFT,
  		WM8991_RIN12VOL_MASK,
  		0,
  		in_pga_tlv),
  
  	SOC_SINGLE("RIN12 ZC Switch", WM8991_RIGHT_LINE_INPUT_1_2_VOLUME,
  		WM8991_RI12ZC_BIT, 1, 0),
  
  	SOC_SINGLE("RIN12 Mute Switch", WM8991_RIGHT_LINE_INPUT_1_2_VOLUME,
  		WM8991_RI12MUTE_BIT, 1, 0),
  
  	SOC_WM899X_OUTPGA_SINGLE_R_TLV("RIN34 Volume",
  		WM8991_RIGHT_LINE_INPUT_3_4_VOLUME,
  		WM8991_RIN34VOL_SHIFT,
  		WM8991_RIN34VOL_MASK,
  		0,
  		in_pga_tlv),
  
  	SOC_SINGLE("RIN34 ZC Switch", WM8991_RIGHT_LINE_INPUT_3_4_VOLUME,
  		WM8991_RI34ZC_BIT, 1, 0),
  
  	SOC_SINGLE("RIN34 Mute Switch", WM8991_RIGHT_LINE_INPUT_3_4_VOLUME,
  		WM8991_RI34MUTE_BIT, 1, 0),
  };
  
  /*
   * _DAPM_ Controls
   */
  static int outmixer_event(struct snd_soc_dapm_widget *w,
  			  struct snd_kcontrol *kcontrol, int event)
  {
  	struct snd_soc_codec *codec = snd_soc_dapm_to_codec(w->dapm);
  	u32 reg_shift = kcontrol->private_value & 0xfff;
  	int ret = 0;
  	u16 reg;
  
  	switch (reg_shift) {
  	case WM8991_SPEAKER_MIXER | (WM8991_LDSPK_BIT << 8):
  		reg = snd_soc_read(codec, WM8991_OUTPUT_MIXER1);
  		if (reg & WM8991_LDLO) {
  			printk(KERN_WARNING
  			       "Cannot set as Output Mixer 1 LDLO Set\n");
  			ret = -1;
  		}
  		break;
  
  	case WM8991_SPEAKER_MIXER | (WM8991_RDSPK_BIT << 8):
  		reg = snd_soc_read(codec, WM8991_OUTPUT_MIXER2);
  		if (reg & WM8991_RDRO) {
  			printk(KERN_WARNING
  			       "Cannot set as Output Mixer 2 RDRO Set\n");
  			ret = -1;
  		}
  		break;
  
  	case WM8991_OUTPUT_MIXER1 | (WM8991_LDLO_BIT << 8):
  		reg = snd_soc_read(codec, WM8991_SPEAKER_MIXER);
  		if (reg & WM8991_LDSPK) {
  			printk(KERN_WARNING
  			       "Cannot set as Speaker Mixer LDSPK Set\n");
  			ret = -1;
  		}
  		break;
  
  	case WM8991_OUTPUT_MIXER2 | (WM8991_RDRO_BIT << 8):
  		reg = snd_soc_read(codec, WM8991_SPEAKER_MIXER);
  		if (reg & WM8991_RDSPK) {
  			printk(KERN_WARNING
  			       "Cannot set as Speaker Mixer RDSPK Set\n");
  			ret = -1;
  		}
  		break;
  	}
  
  	return ret;
  }
  
  /* INMIX dB values */
  static const unsigned int in_mix_tlv[] = {
  	TLV_DB_RANGE_HEAD(1),
  	0, 7, TLV_DB_LINEAR_ITEM(-1200, 600),
  };
  
  /* Left In PGA Connections */
  static const struct snd_kcontrol_new wm8991_dapm_lin12_pga_controls[] = {
  	SOC_DAPM_SINGLE("LIN1 Switch", WM8991_INPUT_MIXER2, WM8991_LMN1_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LIN2 Switch", WM8991_INPUT_MIXER2, WM8991_LMP2_BIT, 1, 0),
  };
  
  static const struct snd_kcontrol_new wm8991_dapm_lin34_pga_controls[] = {
  	SOC_DAPM_SINGLE("LIN3 Switch", WM8991_INPUT_MIXER2, WM8991_LMN3_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LIN4 Switch", WM8991_INPUT_MIXER2, WM8991_LMP4_BIT, 1, 0),
  };
  
  /* Right In PGA Connections */
  static const struct snd_kcontrol_new wm8991_dapm_rin12_pga_controls[] = {
  	SOC_DAPM_SINGLE("RIN1 Switch", WM8991_INPUT_MIXER2, WM8991_RMN1_BIT, 1, 0),
  	SOC_DAPM_SINGLE("RIN2 Switch", WM8991_INPUT_MIXER2, WM8991_RMP2_BIT, 1, 0),
  };
  
  static const struct snd_kcontrol_new wm8991_dapm_rin34_pga_controls[] = {
  	SOC_DAPM_SINGLE("RIN3 Switch", WM8991_INPUT_MIXER2, WM8991_RMN3_BIT, 1, 0),
  	SOC_DAPM_SINGLE("RIN4 Switch", WM8991_INPUT_MIXER2, WM8991_RMP4_BIT, 1, 0),
  };
  
  /* INMIXL */
  static const struct snd_kcontrol_new wm8991_dapm_inmixl_controls[] = {
  	SOC_DAPM_SINGLE_TLV("Record Left Volume", WM8991_INPUT_MIXER3,
  		WM8991_LDBVOL_SHIFT, WM8991_LDBVOL_MASK, 0, in_mix_tlv),
  	SOC_DAPM_SINGLE_TLV("LIN2 Volume", WM8991_INPUT_MIXER5, WM8991_LI2BVOL_SHIFT,
  		7, 0, in_mix_tlv),
  	SOC_DAPM_SINGLE("LINPGA12 Switch", WM8991_INPUT_MIXER3, WM8991_L12MNB_BIT,
  		1, 0),
  	SOC_DAPM_SINGLE("LINPGA34 Switch", WM8991_INPUT_MIXER3, WM8991_L34MNB_BIT,
  		1, 0),
  };
  
  /* INMIXR */
  static const struct snd_kcontrol_new wm8991_dapm_inmixr_controls[] = {
  	SOC_DAPM_SINGLE_TLV("Record Right Volume", WM8991_INPUT_MIXER4,
  		WM8991_RDBVOL_SHIFT, WM8991_RDBVOL_MASK, 0, in_mix_tlv),
  	SOC_DAPM_SINGLE_TLV("RIN2 Volume", WM8991_INPUT_MIXER6, WM8991_RI2BVOL_SHIFT,
  		7, 0, in_mix_tlv),
  	SOC_DAPM_SINGLE("RINPGA12 Switch", WM8991_INPUT_MIXER3, WM8991_L12MNB_BIT,
  		1, 0),
  	SOC_DAPM_SINGLE("RINPGA34 Switch", WM8991_INPUT_MIXER3, WM8991_L34MNB_BIT,
  		1, 0),
  };
  
  /* AINLMUX */
  static const char *wm8991_ainlmux[] =
  {"INMIXL Mix", "RXVOICE Mix", "DIFFINL Mix"};
  
  static SOC_ENUM_SINGLE_DECL(wm8991_ainlmux_enum,
  			    WM8991_INPUT_MIXER1, WM8991_AINLMODE_SHIFT,
  			    wm8991_ainlmux);
  
  static const struct snd_kcontrol_new wm8991_dapm_ainlmux_controls =
  	SOC_DAPM_ENUM("Route", wm8991_ainlmux_enum);
  
  /* DIFFINL */
  
  /* AINRMUX */
  static const char *wm8991_ainrmux[] =
  {"INMIXR Mix", "RXVOICE Mix", "DIFFINR Mix"};
  
  static SOC_ENUM_SINGLE_DECL(wm8991_ainrmux_enum,
  			    WM8991_INPUT_MIXER1, WM8991_AINRMODE_SHIFT,
  			    wm8991_ainrmux);
  
  static const struct snd_kcontrol_new wm8991_dapm_ainrmux_controls =
  	SOC_DAPM_ENUM("Route", wm8991_ainrmux_enum);
  
  /* RXVOICE */
  static const struct snd_kcontrol_new wm8991_dapm_rxvoice_controls[] = {
  	SOC_DAPM_SINGLE_TLV("LIN4RXN", WM8991_INPUT_MIXER5, WM8991_LR4BVOL_SHIFT,
  		WM8991_LR4BVOL_MASK, 0, in_mix_tlv),
  	SOC_DAPM_SINGLE_TLV("RIN4RXP", WM8991_INPUT_MIXER6, WM8991_RL4BVOL_SHIFT,
  		WM8991_RL4BVOL_MASK, 0, in_mix_tlv),
  };
  
  /* LOMIX */
  static const struct snd_kcontrol_new wm8991_dapm_lomix_controls[] = {
  	SOC_DAPM_SINGLE("LOMIX Right ADC Bypass Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LRBLO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOMIX Left ADC Bypass Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LLBLO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOMIX RIN3 Bypass Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LRI3LO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOMIX LIN3 Bypass Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LLI3LO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOMIX RIN12 PGA Bypass Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LR12LO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOMIX LIN12 PGA Bypass Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LL12LO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOMIX Left DAC Switch", WM8991_OUTPUT_MIXER1,
  		WM8991_LDLO_BIT, 1, 0),
  };
  
  /* ROMIX */
  static const struct snd_kcontrol_new wm8991_dapm_romix_controls[] = {
  	SOC_DAPM_SINGLE("ROMIX Left ADC Bypass Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RLBRO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROMIX Right ADC Bypass Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RRBRO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROMIX LIN3 Bypass Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RLI3RO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROMIX RIN3 Bypass Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RRI3RO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROMIX LIN12 PGA Bypass Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RL12RO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROMIX RIN12 PGA Bypass Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RR12RO_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROMIX Right DAC Switch", WM8991_OUTPUT_MIXER2,
  		WM8991_RDRO_BIT, 1, 0),
  };
  
  /* LONMIX */
  static const struct snd_kcontrol_new wm8991_dapm_lonmix_controls[] = {
  	SOC_DAPM_SINGLE("LONMIX Left Mixer PGA Switch", WM8991_LINE_MIXER1,
  		WM8991_LLOPGALON_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LONMIX Right Mixer PGA Switch", WM8991_LINE_MIXER1,
  		WM8991_LROPGALON_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LONMIX Inverted LOP Switch", WM8991_LINE_MIXER1,
  		WM8991_LOPLON_BIT, 1, 0),
  };
  
  /* LOPMIX */
  static const struct snd_kcontrol_new wm8991_dapm_lopmix_controls[] = {
  	SOC_DAPM_SINGLE("LOPMIX Right Mic Bypass Switch", WM8991_LINE_MIXER1,
  		WM8991_LR12LOP_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOPMIX Left Mic Bypass Switch", WM8991_LINE_MIXER1,
  		WM8991_LL12LOP_BIT, 1, 0),
  	SOC_DAPM_SINGLE("LOPMIX Left Mixer PGA Switch", WM8991_LINE_MIXER1,
  		WM8991_LLOPGALOP_BIT, 1, 0),
  };
  
  /* RONMIX */
  static const struct snd_kcontrol_new wm8991_dapm_ronmix_controls[] = {
  	SOC_DAPM_SINGLE("RONMIX Right Mixer PGA Switch", WM8991_LINE_MIXER2,
  		WM8991_RROPGARON_BIT, 1, 0),
  	SOC_DAPM_SINGLE("RONMIX Left Mixer PGA Switch", WM8991_LINE_MIXER2,
  		WM8991_RLOPGARON_BIT, 1, 0),
  	SOC_DAPM_SINGLE("RONMIX Inverted ROP Switch", WM8991_LINE_MIXER2,
  		WM8991_ROPRON_BIT, 1, 0),
  };
  
  /* ROPMIX */
  static const struct snd_kcontrol_new wm8991_dapm_ropmix_controls[] = {
  	SOC_DAPM_SINGLE("ROPMIX Left Mic Bypass Switch", WM8991_LINE_MIXER2,
  		WM8991_RL12ROP_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROPMIX Right Mic Bypass Switch", WM8991_LINE_MIXER2,
  		WM8991_RR12ROP_BIT, 1, 0),
  	SOC_DAPM_SINGLE("ROPMIX Right Mixer PGA Switch", WM8991_LINE_MIXER2,
  		WM8991_RROPGAROP_BIT, 1, 0),
  };
  
  /* OUT3MIX */
  static const struct snd_kcontrol_new wm8991_dapm_out3mix_controls[] = {
  	SOC_DAPM_SINGLE("OUT3MIX LIN4RXN Bypass Switch", WM8991_OUT3_4_MIXER,
  		WM8991_LI4O3_BIT, 1, 0),
  	SOC_DAPM_SINGLE("OUT3MIX Left Out PGA Switch", WM8991_OUT3_4_MIXER,
  		WM8991_LPGAO3_BIT, 1, 0),
  };
  
  /* OUT4MIX */
  static const struct snd_kcontrol_new wm8991_dapm_out4mix_controls[] = {
  	SOC_DAPM_SINGLE("OUT4MIX Right Out PGA Switch", WM8991_OUT3_4_MIXER,
  		WM8991_RPGAO4_BIT, 1, 0),
  	SOC_DAPM_SINGLE("OUT4MIX RIN4RXP Bypass Switch", WM8991_OUT3_4_MIXER,
  		WM8991_RI4O4_BIT, 1, 0),
  };
  
  /* SPKMIX */
  static const struct snd_kcontrol_new wm8991_dapm_spkmix_controls[] = {
  	SOC_DAPM_SINGLE("SPKMIX LIN2 Bypass Switch", WM8991_SPEAKER_MIXER,
  		WM8991_LI2SPK_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX LADC Bypass Switch", WM8991_SPEAKER_MIXER,
  		WM8991_LB2SPK_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX Left Mixer PGA Switch", WM8991_SPEAKER_MIXER,
  		WM8991_LOPGASPK_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX Left DAC Switch", WM8991_SPEAKER_MIXER,
  		WM8991_LDSPK_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX Right DAC Switch", WM8991_SPEAKER_MIXER,
  		WM8991_RDSPK_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX Right Mixer PGA Switch", WM8991_SPEAKER_MIXER,
  		WM8991_ROPGASPK_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX RADC Bypass Switch", WM8991_SPEAKER_MIXER,
  		WM8991_RL12ROP_BIT, 1, 0),
  	SOC_DAPM_SINGLE("SPKMIX RIN2 Bypass Switch", WM8991_SPEAKER_MIXER,
  		WM8991_RI2SPK_BIT, 1, 0),
  };
  
  static const struct snd_soc_dapm_widget wm8991_dapm_widgets[] = {
  	/* Input Side */
  	/* Input Lines */
  	SND_SOC_DAPM_INPUT("LIN1"),
  	SND_SOC_DAPM_INPUT("LIN2"),
  	SND_SOC_DAPM_INPUT("LIN3"),
  	SND_SOC_DAPM_INPUT("LIN4RXN"),
  	SND_SOC_DAPM_INPUT("RIN3"),
  	SND_SOC_DAPM_INPUT("RIN4RXP"),
  	SND_SOC_DAPM_INPUT("RIN1"),
  	SND_SOC_DAPM_INPUT("RIN2"),
  	SND_SOC_DAPM_INPUT("Internal ADC Source"),
  
  	SND_SOC_DAPM_SUPPLY("INL", WM8991_POWER_MANAGEMENT_2,
  			    WM8991_AINL_ENA_BIT, 0, NULL, 0),
  	SND_SOC_DAPM_SUPPLY("INR", WM8991_POWER_MANAGEMENT_2,
  			    WM8991_AINR_ENA_BIT, 0, NULL, 0),
  
  	/* DACs */
  	SND_SOC_DAPM_ADC("Left ADC", "Left Capture", WM8991_POWER_MANAGEMENT_2,
  		WM8991_ADCL_ENA_BIT, 0),
  	SND_SOC_DAPM_ADC("Right ADC", "Right Capture", WM8991_POWER_MANAGEMENT_2,
  		WM8991_ADCR_ENA_BIT, 0),
  
  	/* Input PGAs */
  	SND_SOC_DAPM_MIXER("LIN12 PGA", WM8991_POWER_MANAGEMENT_2, WM8991_LIN12_ENA_BIT,
  		0, &wm8991_dapm_lin12_pga_controls[0],
  		ARRAY_SIZE(wm8991_dapm_lin12_pga_controls)),
  	SND_SOC_DAPM_MIXER("LIN34 PGA", WM8991_POWER_MANAGEMENT_2, WM8991_LIN34_ENA_BIT,
  		0, &wm8991_dapm_lin34_pga_controls[0],
  		ARRAY_SIZE(wm8991_dapm_lin34_pga_controls)),
  	SND_SOC_DAPM_MIXER("RIN12 PGA", WM8991_POWER_MANAGEMENT_2, WM8991_RIN12_ENA_BIT,
  		0, &wm8991_dapm_rin12_pga_controls[0],
  		ARRAY_SIZE(wm8991_dapm_rin12_pga_controls)),
  	SND_SOC_DAPM_MIXER("RIN34 PGA", WM8991_POWER_MANAGEMENT_2, WM8991_RIN34_ENA_BIT,
  		0, &wm8991_dapm_rin34_pga_controls[0],
  		ARRAY_SIZE(wm8991_dapm_rin34_pga_controls)),
  
  	/* INMIXL */
  	SND_SOC_DAPM_MIXER("INMIXL", SND_SOC_NOPM, 0, 0,
  		&wm8991_dapm_inmixl_controls[0],
  		ARRAY_SIZE(wm8991_dapm_inmixl_controls)),
  
  	/* AINLMUX */
  	SND_SOC_DAPM_MUX("AINLMUX", SND_SOC_NOPM, 0, 0,
  		&wm8991_dapm_ainlmux_controls),
  
  	/* INMIXR */
  	SND_SOC_DAPM_MIXER("INMIXR", SND_SOC_NOPM, 0, 0,
  		&wm8991_dapm_inmixr_controls[0],
  		ARRAY_SIZE(wm8991_dapm_inmixr_controls)),
  
  	/* AINRMUX */
  	SND_SOC_DAPM_MUX("AINRMUX", SND_SOC_NOPM, 0, 0,
  		&wm8991_dapm_ainrmux_controls),
  
  	/* Output Side */
  	/* DACs */
  	SND_SOC_DAPM_DAC("Left DAC", "Left Playback", WM8991_POWER_MANAGEMENT_3,
  		WM8991_DACL_ENA_BIT, 0),
  	SND_SOC_DAPM_DAC("Right DAC", "Right Playback", WM8991_POWER_MANAGEMENT_3,
  		WM8991_DACR_ENA_BIT, 0),
  
  	/* LOMIX */
  	SND_SOC_DAPM_MIXER_E("LOMIX", WM8991_POWER_MANAGEMENT_3, WM8991_LOMIX_ENA_BIT,
  		0, &wm8991_dapm_lomix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_lomix_controls),
  		outmixer_event, SND_SOC_DAPM_PRE_REG),
  
  	/* LONMIX */
  	SND_SOC_DAPM_MIXER("LONMIX", WM8991_POWER_MANAGEMENT_3, WM8991_LON_ENA_BIT, 0,
  		&wm8991_dapm_lonmix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_lonmix_controls)),
  
  	/* LOPMIX */
  	SND_SOC_DAPM_MIXER("LOPMIX", WM8991_POWER_MANAGEMENT_3, WM8991_LOP_ENA_BIT, 0,
  		&wm8991_dapm_lopmix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_lopmix_controls)),
  
  	/* OUT3MIX */
  	SND_SOC_DAPM_MIXER("OUT3MIX", WM8991_POWER_MANAGEMENT_1, WM8991_OUT3_ENA_BIT, 0,
  		&wm8991_dapm_out3mix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_out3mix_controls)),
  
  	/* SPKMIX */
  	SND_SOC_DAPM_MIXER_E("SPKMIX", WM8991_POWER_MANAGEMENT_1, WM8991_SPK_ENA_BIT, 0,
  		&wm8991_dapm_spkmix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_spkmix_controls), outmixer_event,
  		SND_SOC_DAPM_PRE_REG),
  
  	/* OUT4MIX */
  	SND_SOC_DAPM_MIXER("OUT4MIX", WM8991_POWER_MANAGEMENT_1, WM8991_OUT4_ENA_BIT, 0,
  		&wm8991_dapm_out4mix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_out4mix_controls)),
  
  	/* ROPMIX */
  	SND_SOC_DAPM_MIXER("ROPMIX", WM8991_POWER_MANAGEMENT_3, WM8991_ROP_ENA_BIT, 0,
  		&wm8991_dapm_ropmix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_ropmix_controls)),
  
  	/* RONMIX */
  	SND_SOC_DAPM_MIXER("RONMIX", WM8991_POWER_MANAGEMENT_3, WM8991_RON_ENA_BIT, 0,
  		&wm8991_dapm_ronmix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_ronmix_controls)),
  
  	/* ROMIX */
  	SND_SOC_DAPM_MIXER_E("ROMIX", WM8991_POWER_MANAGEMENT_3, WM8991_ROMIX_ENA_BIT,
  		0, &wm8991_dapm_romix_controls[0],
  		ARRAY_SIZE(wm8991_dapm_romix_controls),
  		outmixer_event, SND_SOC_DAPM_PRE_REG),
  
  	/* LOUT PGA */
  	SND_SOC_DAPM_PGA("LOUT PGA", WM8991_POWER_MANAGEMENT_1, WM8991_LOUT_ENA_BIT, 0,
  		NULL, 0),
  
  	/* ROUT PGA */
  	SND_SOC_DAPM_PGA("ROUT PGA", WM8991_POWER_MANAGEMENT_1, WM8991_ROUT_ENA_BIT, 0,
  		NULL, 0),
  
  	/* LOPGA */
  	SND_SOC_DAPM_PGA("LOPGA", WM8991_POWER_MANAGEMENT_3, WM8991_LOPGA_ENA_BIT, 0,
  		NULL, 0),
  
  	/* ROPGA */
  	SND_SOC_DAPM_PGA("ROPGA", WM8991_POWER_MANAGEMENT_3, WM8991_ROPGA_ENA_BIT, 0,
  		NULL, 0),
  
  	/* MICBIAS */
  	SND_SOC_DAPM_SUPPLY("MICBIAS", WM8991_POWER_MANAGEMENT_1,
  			    WM8991_MICBIAS_ENA_BIT, 0, NULL, 0),
  
  	SND_SOC_DAPM_OUTPUT("LON"),
  	SND_SOC_DAPM_OUTPUT("LOP"),
  	SND_SOC_DAPM_OUTPUT("OUT3"),
  	SND_SOC_DAPM_OUTPUT("LOUT"),
  	SND_SOC_DAPM_OUTPUT("SPKN"),
  	SND_SOC_DAPM_OUTPUT("SPKP"),
  	SND_SOC_DAPM_OUTPUT("ROUT"),
  	SND_SOC_DAPM_OUTPUT("OUT4"),
  	SND_SOC_DAPM_OUTPUT("ROP"),
  	SND_SOC_DAPM_OUTPUT("RON"),
  	SND_SOC_DAPM_OUTPUT("OUT"),
  
  	SND_SOC_DAPM_OUTPUT("Internal DAC Sink"),
  };
  
  static const struct snd_soc_dapm_route wm8991_dapm_routes[] = {
  	/* Make DACs turn on when playing even if not mixed into any outputs */
  	{"Internal DAC Sink", NULL, "Left DAC"},
  	{"Internal DAC Sink", NULL, "Right DAC"},
  
  	/* Make ADCs turn on when recording even if not mixed from any inputs */
  	{"Left ADC", NULL, "Internal ADC Source"},
  	{"Right ADC", NULL, "Internal ADC Source"},
  
  	/* Input Side */
  	{"INMIXL", NULL, "INL"},
  	{"AINLMUX", NULL, "INL"},
  	{"INMIXR", NULL, "INR"},
  	{"AINRMUX", NULL, "INR"},
  	/* LIN12 PGA */
  	{"LIN12 PGA", "LIN1 Switch", "LIN1"},
  	{"LIN12 PGA", "LIN2 Switch", "LIN2"},
  	/* LIN34 PGA */
  	{"LIN34 PGA", "LIN3 Switch", "LIN3"},
  	{"LIN34 PGA", "LIN4 Switch", "LIN4RXN"},
  	/* INMIXL */
  	{"INMIXL", "Record Left Volume", "LOMIX"},
  	{"INMIXL", "LIN2 Volume", "LIN2"},
  	{"INMIXL", "LINPGA12 Switch", "LIN12 PGA"},
  	{"INMIXL", "LINPGA34 Switch", "LIN34 PGA"},
  	/* AINLMUX */
  	{"AINLMUX", "INMIXL Mix", "INMIXL"},
  	{"AINLMUX", "DIFFINL Mix", "LIN12 PGA"},
  	{"AINLMUX", "DIFFINL Mix", "LIN34 PGA"},
  	{"AINLMUX", "RXVOICE Mix", "LIN4RXN"},
  	{"AINLMUX", "RXVOICE Mix", "RIN4RXP"},
  	/* ADC */
  	{"Left ADC", NULL, "AINLMUX"},
  
  	/* RIN12 PGA */
  	{"RIN12 PGA", "RIN1 Switch", "RIN1"},
  	{"RIN12 PGA", "RIN2 Switch", "RIN2"},
  	/* RIN34 PGA */
  	{"RIN34 PGA", "RIN3 Switch", "RIN3"},
  	{"RIN34 PGA", "RIN4 Switch", "RIN4RXP"},
  	/* INMIXL */
  	{"INMIXR", "Record Right Volume", "ROMIX"},
  	{"INMIXR", "RIN2 Volume", "RIN2"},
  	{"INMIXR", "RINPGA12 Switch", "RIN12 PGA"},
  	{"INMIXR", "RINPGA34 Switch", "RIN34 PGA"},
  	/* AINRMUX */
  	{"AINRMUX", "INMIXR Mix", "INMIXR"},
  	{"AINRMUX", "DIFFINR Mix", "RIN12 PGA"},
  	{"AINRMUX", "DIFFINR Mix", "RIN34 PGA"},
  	{"AINRMUX", "RXVOICE Mix", "LIN4RXN"},
  	{"AINRMUX", "RXVOICE Mix", "RIN4RXP"},
  	/* ADC */
  	{"Right ADC", NULL, "AINRMUX"},
  
  	/* LOMIX */
  	{"LOMIX", "LOMIX RIN3 Bypass Switch", "RIN3"},
  	{"LOMIX", "LOMIX LIN3 Bypass Switch", "LIN3"},
  	{"LOMIX", "LOMIX LIN12 PGA Bypass Switch", "LIN12 PGA"},
  	{"LOMIX", "LOMIX RIN12 PGA Bypass Switch", "RIN12 PGA"},
  	{"LOMIX", "LOMIX Right ADC Bypass Switch", "AINRMUX"},
  	{"LOMIX", "LOMIX Left ADC Bypass Switch", "AINLMUX"},
  	{"LOMIX", "LOMIX Left DAC Switch", "Left DAC"},
  
  	/* ROMIX */
  	{"ROMIX", "ROMIX RIN3 Bypass Switch", "RIN3"},
  	{"ROMIX", "ROMIX LIN3 Bypass Switch", "LIN3"},
  	{"ROMIX", "ROMIX LIN12 PGA Bypass Switch", "LIN12 PGA"},
  	{"ROMIX", "ROMIX RIN12 PGA Bypass Switch", "RIN12 PGA"},
  	{"ROMIX", "ROMIX Right ADC Bypass Switch", "AINRMUX"},
  	{"ROMIX", "ROMIX Left ADC Bypass Switch", "AINLMUX"},
  	{"ROMIX", "ROMIX Right DAC Switch", "Right DAC"},
  
  	/* SPKMIX */
  	{"SPKMIX", "SPKMIX LIN2 Bypass Switch", "LIN2"},
  	{"SPKMIX", "SPKMIX RIN2 Bypass Switch", "RIN2"},
  	{"SPKMIX", "SPKMIX LADC Bypass Switch", "AINLMUX"},
  	{"SPKMIX", "SPKMIX RADC Bypass Switch", "AINRMUX"},
  	{"SPKMIX", "SPKMIX Left Mixer PGA Switch", "LOPGA"},
  	{"SPKMIX", "SPKMIX Right Mixer PGA Switch", "ROPGA"},
  	{"SPKMIX", "SPKMIX Right DAC Switch", "Right DAC"},
  	{"SPKMIX", "SPKMIX Left DAC Switch", "Right DAC"},
  
  	/* LONMIX */
  	{"LONMIX", "LONMIX Left Mixer PGA Switch", "LOPGA"},
  	{"LONMIX", "LONMIX Right Mixer PGA Switch", "ROPGA"},
  	{"LONMIX", "LONMIX Inverted LOP Switch", "LOPMIX"},
  
  	/* LOPMIX */
  	{"LOPMIX", "LOPMIX Right Mic Bypass Switch", "RIN12 PGA"},
  	{"LOPMIX", "LOPMIX Left Mic Bypass Switch", "LIN12 PGA"},
  	{"LOPMIX", "LOPMIX Left Mixer PGA Switch", "LOPGA"},
  
  	/* OUT3MIX */
  	{"OUT3MIX", "OUT3MIX LIN4RXN Bypass Switch", "LIN4RXN"},
  	{"OUT3MIX", "OUT3MIX Left Out PGA Switch", "LOPGA"},
  
  	/* OUT4MIX */
  	{"OUT4MIX", "OUT4MIX Right Out PGA Switch", "ROPGA"},
  	{"OUT4MIX", "OUT4MIX RIN4RXP Bypass Switch", "RIN4RXP"},
  
  	/* RONMIX */
  	{"RONMIX", "RONMIX Right Mixer PGA Switch", "ROPGA"},
  	{"RONMIX", "RONMIX Left Mixer PGA Switch", "LOPGA"},
  	{"RONMIX", "RONMIX Inverted ROP Switch", "ROPMIX"},
  
  	/* ROPMIX */
  	{"ROPMIX", "ROPMIX Left Mic Bypass Switch", "LIN12 PGA"},
  	{"ROPMIX", "ROPMIX Right Mic Bypass Switch", "RIN12 PGA"},
  	{"ROPMIX", "ROPMIX Right Mixer PGA Switch", "ROPGA"},
  
  	/* Out Mixer PGAs */
  	{"LOPGA", NULL, "LOMIX"},
  	{"ROPGA", NULL, "ROMIX"},
  
  	{"LOUT PGA", NULL, "LOMIX"},
  	{"ROUT PGA", NULL, "ROMIX"},
  
  	/* Output Pins */
  	{"LON", NULL, "LONMIX"},
  	{"LOP", NULL, "LOPMIX"},
  	{"OUT", NULL, "OUT3MIX"},
  	{"LOUT", NULL, "LOUT PGA"},
  	{"SPKN", NULL, "SPKMIX"},
  	{"ROUT", NULL, "ROUT PGA"},
  	{"OUT4", NULL, "OUT4MIX"},
  	{"ROP", NULL, "ROPMIX"},
  	{"RON", NULL, "RONMIX"},
  };
  
  /* PLL divisors */
  struct _pll_div {
  	u32 div2;
  	u32 n;
  	u32 k;
  };
  
  /* The size in bits of the pll divide multiplied by 10
   * to allow rounding later */
  #define FIXED_PLL_SIZE ((1 << 16) * 10)
  
  static void pll_factors(struct _pll_div *pll_div, unsigned int target,
  			unsigned int source)
  {
  	u64 Kpart;
  	unsigned int K, Ndiv, Nmod;
  
  
  	Ndiv = target / source;
  	if (Ndiv < 6) {
  		source >>= 1;
  		pll_div->div2 = 1;
  		Ndiv = target / source;
  	} else
  		pll_div->div2 = 0;
  
  	if ((Ndiv < 6) || (Ndiv > 12))
  		printk(KERN_WARNING
  		       "WM8991 N value outwith recommended range! N = %d\n", Ndiv);
  
  	pll_div->n = Ndiv;
  	Nmod = target % source;
  	Kpart = FIXED_PLL_SIZE * (long long)Nmod;
  
  	do_div(Kpart, source);
  
  	K = Kpart & 0xFFFFFFFF;
  
  	/* Check if we need to round */
  	if ((K % 10) >= 5)
  		K += 5;
  
  	/* Move down to proper range now rounding is done */
  	K /= 10;
  
  	pll_div->k = K;
  }
  
  static int wm8991_set_dai_pll(struct snd_soc_dai *codec_dai,
  			      int pll_id, int src, unsigned int freq_in, unsigned int freq_out)
  {
  	u16 reg;
  	struct snd_soc_codec *codec = codec_dai->codec;
  	struct _pll_div pll_div;
  
  	if (freq_in && freq_out) {
  		pll_factors(&pll_div, freq_out * 4, freq_in);
  
  		/* Turn on PLL */
  		reg = snd_soc_read(codec, WM8991_POWER_MANAGEMENT_2);
  		reg |= WM8991_PLL_ENA;
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_2, reg);
  
  		/* sysclk comes from PLL */
  		reg = snd_soc_read(codec, WM8991_CLOCKING_2);
  		snd_soc_write(codec, WM8991_CLOCKING_2, reg | WM8991_SYSCLK_SRC);
  
  		/* set up N , fractional mode and pre-divisor if necessary */
  		snd_soc_write(codec, WM8991_PLL1, pll_div.n | WM8991_SDM |
  			      (pll_div.div2 ? WM8991_PRESCALE : 0));
  		snd_soc_write(codec, WM8991_PLL2, (u8)(pll_div.k>>8));
  		snd_soc_write(codec, WM8991_PLL3, (u8)(pll_div.k & 0xFF));
  	} else {
  		/* Turn on PLL */
  		reg = snd_soc_read(codec, WM8991_POWER_MANAGEMENT_2);
  		reg &= ~WM8991_PLL_ENA;
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_2, reg);
  	}
  	return 0;
  }
  
  /*
   * Set's ADC and Voice DAC format.
   */
  static int wm8991_set_dai_fmt(struct snd_soc_dai *codec_dai,
  			      unsigned int fmt)
  {
  	struct snd_soc_codec *codec = codec_dai->codec;
  	u16 audio1, audio3;
  
  	audio1 = snd_soc_read(codec, WM8991_AUDIO_INTERFACE_1);
  	audio3 = snd_soc_read(codec, WM8991_AUDIO_INTERFACE_3);
  
  	/* set master/slave audio interface */
  	switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  	case SND_SOC_DAIFMT_CBS_CFS:
  		audio3 &= ~WM8991_AIF_MSTR1;
  		break;
  	case SND_SOC_DAIFMT_CBM_CFM:
  		audio3 |= WM8991_AIF_MSTR1;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	audio1 &= ~WM8991_AIF_FMT_MASK;
  
  	/* interface format */
  	switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  	case SND_SOC_DAIFMT_I2S:
  		audio1 |= WM8991_AIF_TMF_I2S;
  		audio1 &= ~WM8991_AIF_LRCLK_INV;
  		break;
  	case SND_SOC_DAIFMT_RIGHT_J:
  		audio1 |= WM8991_AIF_TMF_RIGHTJ;
  		audio1 &= ~WM8991_AIF_LRCLK_INV;
  		break;
  	case SND_SOC_DAIFMT_LEFT_J:
  		audio1 |= WM8991_AIF_TMF_LEFTJ;
  		audio1 &= ~WM8991_AIF_LRCLK_INV;
  		break;
  	case SND_SOC_DAIFMT_DSP_A:
  		audio1 |= WM8991_AIF_TMF_DSP;
  		audio1 &= ~WM8991_AIF_LRCLK_INV;
  		break;
  	case SND_SOC_DAIFMT_DSP_B:
  		audio1 |= WM8991_AIF_TMF_DSP | WM8991_AIF_LRCLK_INV;
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	snd_soc_write(codec, WM8991_AUDIO_INTERFACE_1, audio1);
  	snd_soc_write(codec, WM8991_AUDIO_INTERFACE_3, audio3);
  	return 0;
  }
  
  static int wm8991_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
  				 int div_id, int div)
  {
  	struct snd_soc_codec *codec = codec_dai->codec;
  	u16 reg;
  
  	switch (div_id) {
  	case WM8991_MCLK_DIV:
  		reg = snd_soc_read(codec, WM8991_CLOCKING_2) &
  		      ~WM8991_MCLK_DIV_MASK;
  		snd_soc_write(codec, WM8991_CLOCKING_2, reg | div);
  		break;
  	case WM8991_DACCLK_DIV:
  		reg = snd_soc_read(codec, WM8991_CLOCKING_2) &
  		      ~WM8991_DAC_CLKDIV_MASK;
  		snd_soc_write(codec, WM8991_CLOCKING_2, reg | div);
  		break;
  	case WM8991_ADCCLK_DIV:
  		reg = snd_soc_read(codec, WM8991_CLOCKING_2) &
  		      ~WM8991_ADC_CLKDIV_MASK;
  		snd_soc_write(codec, WM8991_CLOCKING_2, reg | div);
  		break;
  	case WM8991_BCLK_DIV:
  		reg = snd_soc_read(codec, WM8991_CLOCKING_1) &
  		      ~WM8991_BCLK_DIV_MASK;
  		snd_soc_write(codec, WM8991_CLOCKING_1, reg | div);
  		break;
  	default:
  		return -EINVAL;
  	}
  
  	return 0;
  }
  
  /*
   * Set PCM DAI bit size and sample rate.
   */
  static int wm8991_hw_params(struct snd_pcm_substream *substream,
  			    struct snd_pcm_hw_params *params,
  			    struct snd_soc_dai *dai)
  {
  	struct snd_soc_codec *codec = dai->codec;
  	u16 audio1 = snd_soc_read(codec, WM8991_AUDIO_INTERFACE_1);
  
  	audio1 &= ~WM8991_AIF_WL_MASK;
  	/* bit size */
  	switch (params_width(params)) {
  	case 16:
  		break;
  	case 20:
  		audio1 |= WM8991_AIF_WL_20BITS;
  		break;
  	case 24:
  		audio1 |= WM8991_AIF_WL_24BITS;
  		break;
  	case 32:
  		audio1 |= WM8991_AIF_WL_32BITS;
  		break;
  	}
  
  	snd_soc_write(codec, WM8991_AUDIO_INTERFACE_1, audio1);
  	return 0;
  }
  
  static int wm8991_mute(struct snd_soc_dai *dai, int mute)
  {
  	struct snd_soc_codec *codec = dai->codec;
  	u16 val;
  
  	val  = snd_soc_read(codec, WM8991_DAC_CTRL) & ~WM8991_DAC_MUTE;
  	if (mute)
  		snd_soc_write(codec, WM8991_DAC_CTRL, val | WM8991_DAC_MUTE);
  	else
  		snd_soc_write(codec, WM8991_DAC_CTRL, val);
  	return 0;
  }
  
  static int wm8991_set_bias_level(struct snd_soc_codec *codec,
  				 enum snd_soc_bias_level level)
  {
  	struct wm8991_priv *wm8991 = snd_soc_codec_get_drvdata(codec);
  	u16 val;
  
  	switch (level) {
  	case SND_SOC_BIAS_ON:
  		break;
  
  	case SND_SOC_BIAS_PREPARE:
  		/* VMID=2*50k */
  		val = snd_soc_read(codec, WM8991_POWER_MANAGEMENT_1) &
  		      ~WM8991_VMID_MODE_MASK;
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, val | 0x2);
  		break;
  
  	case SND_SOC_BIAS_STANDBY:
  		if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) {
  			regcache_sync(wm8991->regmap);
  			/* Enable all output discharge bits */
  			snd_soc_write(codec, WM8991_ANTIPOP1, WM8991_DIS_LLINE |
  				      WM8991_DIS_RLINE | WM8991_DIS_OUT3 |
  				      WM8991_DIS_OUT4 | WM8991_DIS_LOUT |
  				      WM8991_DIS_ROUT);
  
  			/* Enable POBCTRL, SOFT_ST, VMIDTOG and BUFDCOPEN */
  			snd_soc_write(codec, WM8991_ANTIPOP2, WM8991_SOFTST |
  				      WM8991_BUFDCOPEN | WM8991_POBCTRL |
  				      WM8991_VMIDTOG);
  
  			/* Delay to allow output caps to discharge */
  			msleep(300);
  
  			/* Disable VMIDTOG */
  			snd_soc_write(codec, WM8991_ANTIPOP2, WM8991_SOFTST |
  				      WM8991_BUFDCOPEN | WM8991_POBCTRL);
  
  			/* disable all output discharge bits */
  			snd_soc_write(codec, WM8991_ANTIPOP1, 0);
  
  			/* Enable outputs */
  			snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x1b00);
  
  			msleep(50);
  
  			/* Enable VMID at 2x50k */
  			snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x1f02);
  
  			msleep(100);
  
  			/* Enable VREF */
  			snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x1f03);
  
  			msleep(600);
  
  			/* Enable BUFIOEN */
  			snd_soc_write(codec, WM8991_ANTIPOP2, WM8991_SOFTST |
  				      WM8991_BUFDCOPEN | WM8991_POBCTRL |
  				      WM8991_BUFIOEN);
  
  			/* Disable outputs */
  			snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x3);
  
  			/* disable POBCTRL, SOFT_ST and BUFDCOPEN */
  			snd_soc_write(codec, WM8991_ANTIPOP2, WM8991_BUFIOEN);
  		}
  
  		/* VMID=2*250k */
  		val = snd_soc_read(codec, WM8991_POWER_MANAGEMENT_1) &
  		      ~WM8991_VMID_MODE_MASK;
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, val | 0x4);
  		break;
  
  	case SND_SOC_BIAS_OFF:
  		/* Enable POBCTRL and SOFT_ST */
  		snd_soc_write(codec, WM8991_ANTIPOP2, WM8991_SOFTST |
  			      WM8991_POBCTRL | WM8991_BUFIOEN);
  
  		/* Enable POBCTRL, SOFT_ST and BUFDCOPEN */
  		snd_soc_write(codec, WM8991_ANTIPOP2, WM8991_SOFTST |
  			      WM8991_BUFDCOPEN | WM8991_POBCTRL |
  			      WM8991_BUFIOEN);
  
  		/* mute DAC */
  		val = snd_soc_read(codec, WM8991_DAC_CTRL);
  		snd_soc_write(codec, WM8991_DAC_CTRL, val | WM8991_DAC_MUTE);
  
  		/* Enable any disabled outputs */
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x1f03);
  
  		/* Disable VMID */
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x1f01);
  
  		msleep(300);
  
  		/* Enable all output discharge bits */
  		snd_soc_write(codec, WM8991_ANTIPOP1, WM8991_DIS_LLINE |
  			      WM8991_DIS_RLINE | WM8991_DIS_OUT3 |
  			      WM8991_DIS_OUT4 | WM8991_DIS_LOUT |
  			      WM8991_DIS_ROUT);
  
  		/* Disable VREF */
  		snd_soc_write(codec, WM8991_POWER_MANAGEMENT_1, 0x0);
  
  		/* disable POBCTRL, SOFT_ST and BUFDCOPEN */
  		snd_soc_write(codec, WM8991_ANTIPOP2, 0x0);
  		regcache_mark_dirty(wm8991->regmap);
  		break;
  	}
  
  	return 0;
  }
  
  #define WM8991_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
  			SNDRV_PCM_FMTBIT_S24_LE)
  
  static const struct snd_soc_dai_ops wm8991_ops = {
  	.hw_params = wm8991_hw_params,
  	.digital_mute = wm8991_mute,
  	.set_fmt = wm8991_set_dai_fmt,
  	.set_clkdiv = wm8991_set_dai_clkdiv,
  	.set_pll = wm8991_set_dai_pll
  };
  
  /*
   * The WM8991 supports 2 different and mutually exclusive DAI
   * configurations.
   *
   * 1. ADC/DAC on Primary Interface
   * 2. ADC on Primary Interface/DAC on secondary
   */
  static struct snd_soc_dai_driver wm8991_dai = {
  	/* ADC/DAC on primary */
  	.name = "wm8991",
  	.id = 1,
  	.playback = {
  		.stream_name = "Playback",
  		.channels_min = 1,
  		.channels_max = 2,
  		.rates = SNDRV_PCM_RATE_8000_96000,
  		.formats = WM8991_FORMATS
  	},
  	.capture = {
  		.stream_name = "Capture",
  		.channels_min = 1,
  		.channels_max = 2,
  		.rates = SNDRV_PCM_RATE_8000_96000,
  		.formats = WM8991_FORMATS
  	},
  	.ops = &wm8991_ops
  };
  
  static struct snd_soc_codec_driver soc_codec_dev_wm8991 = {
  	.set_bias_level = wm8991_set_bias_level,
  	.suspend_bias_off = true,
  
  	.controls = wm8991_snd_controls,
  	.num_controls = ARRAY_SIZE(wm8991_snd_controls),
  	.dapm_widgets = wm8991_dapm_widgets,
  	.num_dapm_widgets = ARRAY_SIZE(wm8991_dapm_widgets),
  	.dapm_routes = wm8991_dapm_routes,
  	.num_dapm_routes = ARRAY_SIZE(wm8991_dapm_routes),
  };
  
  static const struct regmap_config wm8991_regmap = {
  	.reg_bits = 8,
  	.val_bits = 16,
  
  	.max_register = WM8991_PLL3,
  	.volatile_reg = wm8991_volatile,
  	.reg_defaults = wm8991_reg_defaults,
  	.num_reg_defaults = ARRAY_SIZE(wm8991_reg_defaults),
  	.cache_type = REGCACHE_RBTREE,
  };
  
  static int wm8991_i2c_probe(struct i2c_client *i2c,
  			    const struct i2c_device_id *id)
  {
  	struct wm8991_priv *wm8991;
  	unsigned int val;
  	int ret;
  
  	wm8991 = devm_kzalloc(&i2c->dev, sizeof(*wm8991), GFP_KERNEL);
  	if (!wm8991)
  		return -ENOMEM;
  
  	wm8991->regmap = devm_regmap_init_i2c(i2c, &wm8991_regmap);
  	if (IS_ERR(wm8991->regmap))
  		return PTR_ERR(wm8991->regmap);
  
  	i2c_set_clientdata(i2c, wm8991);
  
  	ret = regmap_read(wm8991->regmap, WM8991_RESET, &val);
  	if (ret != 0) {
  		dev_err(&i2c->dev, "Failed to read device ID: %d\n", ret);
  		return ret;
  	}
  	if (val != 0x8991) {
  		dev_err(&i2c->dev, "Device with ID %x is not a WM8991\n", val);
  		return -EINVAL;
  	}
  
  	ret = regmap_write(wm8991->regmap, WM8991_RESET, 0);
  	if (ret < 0) {
  		dev_err(&i2c->dev, "Failed to issue reset: %d\n", ret);
  		return ret;
  	}
  
  	regmap_update_bits(wm8991->regmap, WM8991_AUDIO_INTERFACE_4,
  			   WM8991_ALRCGPIO1, WM8991_ALRCGPIO1);
  
  	regmap_update_bits(wm8991->regmap, WM8991_GPIO1_GPIO2,
  			   WM8991_GPIO1_SEL_MASK, 1);
  
  	regmap_update_bits(wm8991->regmap, WM8991_POWER_MANAGEMENT_1,
  			   WM8991_VREF_ENA | WM8991_VMID_MODE_MASK,
  			   WM8991_VREF_ENA | WM8991_VMID_MODE_MASK);
  
  	regmap_update_bits(wm8991->regmap, WM8991_POWER_MANAGEMENT_2,
  			   WM8991_OPCLK_ENA, WM8991_OPCLK_ENA);
  
  	regmap_write(wm8991->regmap, WM8991_DAC_CTRL, 0);
  	regmap_write(wm8991->regmap, WM8991_LEFT_OUTPUT_VOLUME,
  		     0x50 | (1<<8));
  	regmap_write(wm8991->regmap, WM8991_RIGHT_OUTPUT_VOLUME,
  		     0x50 | (1<<8));
  
  	ret = snd_soc_register_codec(&i2c->dev,
  				     &soc_codec_dev_wm8991, &wm8991_dai, 1);
  
  	return ret;
  }
  
  static int wm8991_i2c_remove(struct i2c_client *client)
  {
  	snd_soc_unregister_codec(&client->dev);
  
  	return 0;
  }
  
  static const struct i2c_device_id wm8991_i2c_id[] = {
  	{ "wm8991", 0 },
  	{ }
  };
  MODULE_DEVICE_TABLE(i2c, wm8991_i2c_id);
  
  static struct i2c_driver wm8991_i2c_driver = {
  	.driver = {
  		.name = "wm8991",
  		.owner = THIS_MODULE,
  	},
  	.probe = wm8991_i2c_probe,
  	.remove = wm8991_i2c_remove,
  	.id_table = wm8991_i2c_id,
  };
  
  module_i2c_driver(wm8991_i2c_driver);
  
  MODULE_DESCRIPTION("ASoC WM8991 driver");
  MODULE_AUTHOR("Graeme Gregory");
  MODULE_LICENSE("GPL");
  