Moved, renamed, and deleted files

The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.

1 files changed, 0 insertions, 740 deletions

diff --git a/ANDROID_3.4.5/sound/soc/codecs/cs4270.c b/ANDROID_3.4.5/sound/soc/codecs/cs4270.c
deleted file mode 100644
index 1d672f52..00000000
--- a/ANDROID_3.4.5/sound/soc/codecs/cs4270.c
+++ /dev/null
@@ -1,740 +0,0 @@
-/*
- * CS4270 ALSA SoC (ASoC) codec driver
- *
- * Author: Timur Tabi <timur@freescale.com>
- *
- * Copyright 2007-2009 Freescale Semiconductor, Inc.  This file is licensed
- * under the terms of the GNU General Public License version 2.  This
- * program is licensed "as is" without any warranty of any kind, whether
- * express or implied.
- *
- * This is an ASoC device driver for the Cirrus Logic CS4270 codec.
- *
- * Current features/limitations:
- *
- * - Software mode is supported.  Stand-alone mode is not supported.
- * - Only I2C is supported, not SPI
- * - Support for master and slave mode
- * - The machine driver's 'startup' function must call
- *   cs4270_set_dai_sysclk() with the value of MCLK.
- * - Only I2S and left-justified modes are supported
- * - Power management is supported
- */
-
-#include <linux/module.h>
-#include <linux/slab.h>
-#include <sound/core.h>
-#include <sound/soc.h>
-#include <sound/initval.h>
-#include <linux/i2c.h>
-#include <linux/delay.h>
-#include <linux/regulator/consumer.h>
-
-/*
- * The codec isn't really big-endian or little-endian, since the I2S
- * interface requires data to be sent serially with the MSbit first.
- * However, to support BE and LE I2S devices, we specify both here.  That
- * way, ALSA will always match the bit patterns.
- */
-#define CS4270_FORMATS (SNDRV_PCM_FMTBIT_S8      | \
-			SNDRV_PCM_FMTBIT_S16_LE  | SNDRV_PCM_FMTBIT_S16_BE  | \
-			SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S18_3BE | \
-			SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S20_3BE | \
-			SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE | \
-			SNDRV_PCM_FMTBIT_S24_LE  | SNDRV_PCM_FMTBIT_S24_BE)
-
-/* CS4270 registers addresses */
-#define CS4270_CHIPID	0x01	/* Chip ID */
-#define CS4270_PWRCTL	0x02	/* Power Control */
-#define CS4270_MODE	0x03	/* Mode Control */
-#define CS4270_FORMAT	0x04	/* Serial Format, ADC/DAC Control */
-#define CS4270_TRANS	0x05	/* Transition Control */
-#define CS4270_MUTE	0x06	/* Mute Control */
-#define CS4270_VOLA	0x07	/* DAC Channel A Volume Control */
-#define CS4270_VOLB	0x08	/* DAC Channel B Volume Control */
-
-#define CS4270_FIRSTREG	0x01
-#define CS4270_LASTREG	0x08
-#define CS4270_NUMREGS	(CS4270_LASTREG - CS4270_FIRSTREG + 1)
-#define CS4270_I2C_INCR	0x80
-
-/* Bit masks for the CS4270 registers */
-#define CS4270_CHIPID_ID	0xF0
-#define CS4270_CHIPID_REV	0x0F
-#define CS4270_PWRCTL_FREEZE	0x80
-#define CS4270_PWRCTL_PDN_ADC	0x20
-#define CS4270_PWRCTL_PDN_DAC	0x02
-#define CS4270_PWRCTL_PDN	0x01
-#define CS4270_PWRCTL_PDN_ALL	\
-	(CS4270_PWRCTL_PDN_ADC | CS4270_PWRCTL_PDN_DAC | CS4270_PWRCTL_PDN)
-#define CS4270_MODE_SPEED_MASK	0x30
-#define CS4270_MODE_1X		0x00
-#define CS4270_MODE_2X		0x10
-#define CS4270_MODE_4X		0x20
-#define CS4270_MODE_SLAVE	0x30
-#define CS4270_MODE_DIV_MASK	0x0E
-#define CS4270_MODE_DIV1	0x00
-#define CS4270_MODE_DIV15	0x02
-#define CS4270_MODE_DIV2	0x04
-#define CS4270_MODE_DIV3	0x06
-#define CS4270_MODE_DIV4	0x08
-#define CS4270_MODE_POPGUARD	0x01
-#define CS4270_FORMAT_FREEZE_A	0x80
-#define CS4270_FORMAT_FREEZE_B	0x40
-#define CS4270_FORMAT_LOOPBACK	0x20
-#define CS4270_FORMAT_DAC_MASK	0x18
-#define CS4270_FORMAT_DAC_LJ	0x00
-#define CS4270_FORMAT_DAC_I2S	0x08
-#define CS4270_FORMAT_DAC_RJ16	0x18
-#define CS4270_FORMAT_DAC_RJ24	0x10
-#define CS4270_FORMAT_ADC_MASK	0x01
-#define CS4270_FORMAT_ADC_LJ	0x00
-#define CS4270_FORMAT_ADC_I2S	0x01
-#define CS4270_TRANS_ONE_VOL	0x80
-#define CS4270_TRANS_SOFT	0x40
-#define CS4270_TRANS_ZERO	0x20
-#define CS4270_TRANS_INV_ADC_A	0x08
-#define CS4270_TRANS_INV_ADC_B	0x10
-#define CS4270_TRANS_INV_DAC_A	0x02
-#define CS4270_TRANS_INV_DAC_B	0x04
-#define CS4270_TRANS_DEEMPH	0x01
-#define CS4270_MUTE_AUTO	0x20
-#define CS4270_MUTE_ADC_A	0x08
-#define CS4270_MUTE_ADC_B	0x10
-#define CS4270_MUTE_POLARITY	0x04
-#define CS4270_MUTE_DAC_A	0x01
-#define CS4270_MUTE_DAC_B	0x02
-
-/* Power-on default values for the registers
- *
- * This array contains the power-on default values of the registers, with the
- * exception of the "CHIPID" register (01h).  The lower four bits of that
- * register contain the hardware revision, so it is treated as volatile.
- *
- * Also note that on the CS4270, the first readable register is 1, but ASoC
- * assumes the first register is 0.  Therfore, the array must have an entry for
- * register 0, but we use cs4270_reg_is_readable() to tell ASoC that it can't
- * be read.
- */
-static const u8 cs4270_default_reg_cache[CS4270_LASTREG + 1] = {
-	0x00, 0x00, 0x00, 0x30, 0x00, 0x60, 0x20, 0x00, 0x00
-};
-
-static const char *supply_names[] = {
-	"va", "vd", "vlc"
-};
-
-/* Private data for the CS4270 */
-struct cs4270_private {
-	enum snd_soc_control_type control_type;
-	unsigned int mclk; /* Input frequency of the MCLK pin */
-	unsigned int mode; /* The mode (I2S or left-justified) */
-	unsigned int slave_mode;
-	unsigned int manual_mute;
-
-	/* power domain regulators */
-	struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)];
-};
-
-/**
- * struct cs4270_mode_ratios - clock ratio tables
- * @ratio: the ratio of MCLK to the sample rate
- * @speed_mode: the Speed Mode bits to set in the Mode Control register for
- *              this ratio
- * @mclk: the Ratio Select bits to set in the Mode Control register for this
- *        ratio
- *
- * The data for this chart is taken from Table 5 of the CS4270 reference
- * manual.
- *
- * This table is used to determine how to program the Mode Control register.
- * It is also used by cs4270_set_dai_sysclk() to tell ALSA which sampling
- * rates the CS4270 currently supports.
- *
- * @speed_mode is the corresponding bit pattern to be written to the
- * MODE bits of the Mode Control Register
- *
- * @mclk is the corresponding bit pattern to be wirten to the MCLK bits of
- * the Mode Control Register.
- *
- * In situations where a single ratio is represented by multiple speed
- * modes, we favor the slowest speed.  E.g, for a ratio of 128, we pick
- * double-speed instead of quad-speed.  However, the CS4270 errata states
- * that divide-By-1.5 can cause failures, so we avoid that mode where
- * possible.
- *
- * Errata: There is an errata for the CS4270 where divide-by-1.5 does not
- * work if Vd is 3.3V.  If this effects you, select the
- * CONFIG_SND_SOC_CS4270_VD33_ERRATA Kconfig option, and the driver will
- * never select any sample rates that require divide-by-1.5.
- */
-struct cs4270_mode_ratios {
-	unsigned int ratio;
-	u8 speed_mode;
-	u8 mclk;
-};
-
-static struct cs4270_mode_ratios cs4270_mode_ratios[] = {
-	{64, CS4270_MODE_4X, CS4270_MODE_DIV1},
-#ifndef CONFIG_SND_SOC_CS4270_VD33_ERRATA
-	{96, CS4270_MODE_4X, CS4270_MODE_DIV15},
-#endif
-	{128, CS4270_MODE_2X, CS4270_MODE_DIV1},
-	{192, CS4270_MODE_4X, CS4270_MODE_DIV3},
-	{256, CS4270_MODE_1X, CS4270_MODE_DIV1},
-	{384, CS4270_MODE_2X, CS4270_MODE_DIV3},
-	{512, CS4270_MODE_1X, CS4270_MODE_DIV2},
-	{768, CS4270_MODE_1X, CS4270_MODE_DIV3},
-	{1024, CS4270_MODE_1X, CS4270_MODE_DIV4}
-};
-
-/* The number of MCLK/LRCK ratios supported by the CS4270 */
-#define NUM_MCLK_RATIOS		ARRAY_SIZE(cs4270_mode_ratios)
-
-static int cs4270_reg_is_readable(struct snd_soc_codec *codec, unsigned int reg)
-{
-	return (reg >= CS4270_FIRSTREG) && (reg <= CS4270_LASTREG);
-}
-
-static int cs4270_reg_is_volatile(struct snd_soc_codec *codec, unsigned int reg)
-{
-	/* Unreadable registers are considered volatile */
-	if ((reg < CS4270_FIRSTREG) || (reg > CS4270_LASTREG))
-		return 1;
-
-	return reg == CS4270_CHIPID;
-}
-
-/**
- * cs4270_set_dai_sysclk - determine the CS4270 samples rates.
- * @codec_dai: the codec DAI
- * @clk_id: the clock ID (ignored)
- * @freq: the MCLK input frequency
- * @dir: the clock direction (ignored)
- *
- * This function is used to tell the codec driver what the input MCLK
- * frequency is.
- *
- * The value of MCLK is used to determine which sample rates are supported
- * by the CS4270.  The ratio of MCLK / Fs must be equal to one of nine
- * supported values - 64, 96, 128, 192, 256, 384, 512, 768, and 1024.
- *
- * This function calculates the nine ratios and determines which ones match
- * a standard sample rate.  If there's a match, then it is added to the list
- * of supported sample rates.
- *
- * This function must be called by the machine driver's 'startup' function,
- * otherwise the list of supported sample rates will not be available in
- * time for ALSA.
- *
- * For setups with variable MCLKs, pass 0 as 'freq' argument. This will cause
- * theoretically possible sample rates to be enabled. Call it again with a
- * proper value set one the external clock is set (most probably you would do
- * that from a machine's driver 'hw_param' hook.
- */
-static int cs4270_set_dai_sysclk(struct snd_soc_dai *codec_dai,
-				 int clk_id, unsigned int freq, int dir)
-{
-	struct snd_soc_codec *codec = codec_dai->codec;
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-
-	cs4270->mclk = freq;
-	return 0;
-}
-
-/**
- * cs4270_set_dai_fmt - configure the codec for the selected audio format
- * @codec_dai: the codec DAI
- * @format: a SND_SOC_DAIFMT_x value indicating the data format
- *
- * This function takes a bitmask of SND_SOC_DAIFMT_x bits and programs the
- * codec accordingly.
- *
- * Currently, this function only supports SND_SOC_DAIFMT_I2S and
- * SND_SOC_DAIFMT_LEFT_J.  The CS4270 codec also supports right-justified
- * data for playback only, but ASoC currently does not support different
- * formats for playback vs. record.
- */
-static int cs4270_set_dai_fmt(struct snd_soc_dai *codec_dai,
-			      unsigned int format)
-{
-	struct snd_soc_codec *codec = codec_dai->codec;
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-
-	/* set DAI format */
-	switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
-	case SND_SOC_DAIFMT_I2S:
-	case SND_SOC_DAIFMT_LEFT_J:
-		cs4270->mode = format & SND_SOC_DAIFMT_FORMAT_MASK;
-		break;
-	default:
-		dev_err(codec->dev, "invalid dai format\n");
-		return -EINVAL;
-	}
-
-	/* set master/slave audio interface */
-	switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
-	case SND_SOC_DAIFMT_CBS_CFS:
-		cs4270->slave_mode = 1;
-		break;
-	case SND_SOC_DAIFMT_CBM_CFM:
-		cs4270->slave_mode = 0;
-		break;
-	default:
-		/* all other modes are unsupported by the hardware */
-		dev_err(codec->dev, "Unknown master/slave configuration\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/**
- * cs4270_hw_params - program the CS4270 with the given hardware parameters.
- * @substream: the audio stream
- * @params: the hardware parameters to set
- * @dai: the SOC DAI (ignored)
- *
- * This function programs the hardware with the values provided.
- * Specifically, the sample rate and the data format.
- *
- * The .ops functions are used to provide board-specific data, like input
- * frequencies, to this driver.  This function takes that information,
- * combines it with the hardware parameters provided, and programs the
- * hardware accordingly.
- */
-static int cs4270_hw_params(struct snd_pcm_substream *substream,
-			    struct snd_pcm_hw_params *params,
-			    struct snd_soc_dai *dai)
-{
-	struct snd_soc_pcm_runtime *rtd = substream->private_data;
-	struct snd_soc_codec *codec = rtd->codec;
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int ret;
-	unsigned int i;
-	unsigned int rate;
-	unsigned int ratio;
-	int reg;
-
-	/* Figure out which MCLK/LRCK ratio to use */
-
-	rate = params_rate(params);	/* Sampling rate, in Hz */
-	ratio = cs4270->mclk / rate;	/* MCLK/LRCK ratio */
-
-	for (i = 0; i < NUM_MCLK_RATIOS; i++) {
-		if (cs4270_mode_ratios[i].ratio == ratio)
-			break;
-	}
-
-	if (i == NUM_MCLK_RATIOS) {
-		/* We did not find a matching ratio */
-		dev_err(codec->dev, "could not find matching ratio\n");
-		return -EINVAL;
-	}
-
-	/* Set the sample rate */
-
-	reg = snd_soc_read(codec, CS4270_MODE);
-	reg &= ~(CS4270_MODE_SPEED_MASK | CS4270_MODE_DIV_MASK);
-	reg |= cs4270_mode_ratios[i].mclk;
-
-	if (cs4270->slave_mode)
-		reg |= CS4270_MODE_SLAVE;
-	else
-		reg |= cs4270_mode_ratios[i].speed_mode;
-
-	ret = snd_soc_write(codec, CS4270_MODE, reg);
-	if (ret < 0) {
-		dev_err(codec->dev, "i2c write failed\n");
-		return ret;
-	}
-
-	/* Set the DAI format */
-
-	reg = snd_soc_read(codec, CS4270_FORMAT);
-	reg &= ~(CS4270_FORMAT_DAC_MASK | CS4270_FORMAT_ADC_MASK);
-
-	switch (cs4270->mode) {
-	case SND_SOC_DAIFMT_I2S:
-		reg |= CS4270_FORMAT_DAC_I2S | CS4270_FORMAT_ADC_I2S;
-		break;
-	case SND_SOC_DAIFMT_LEFT_J:
-		reg |= CS4270_FORMAT_DAC_LJ | CS4270_FORMAT_ADC_LJ;
-		break;
-	default:
-		dev_err(codec->dev, "unknown dai format\n");
-		return -EINVAL;
-	}
-
-	ret = snd_soc_write(codec, CS4270_FORMAT, reg);
-	if (ret < 0) {
-		dev_err(codec->dev, "i2c write failed\n");
-		return ret;
-	}
-
-	return ret;
-}
-
-/**
- * cs4270_dai_mute - enable/disable the CS4270 external mute
- * @dai: the SOC DAI
- * @mute: 0 = disable mute, 1 = enable mute
- *
- * This function toggles the mute bits in the MUTE register.  The CS4270's
- * mute capability is intended for external muting circuitry, so if the
- * board does not have the MUTEA or MUTEB pins connected to such circuitry,
- * then this function will do nothing.
- */
-static int cs4270_dai_mute(struct snd_soc_dai *dai, int mute)
-{
-	struct snd_soc_codec *codec = dai->codec;
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int reg6;
-
-	reg6 = snd_soc_read(codec, CS4270_MUTE);
-
-	if (mute)
-		reg6 |= CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B;
-	else {
-		reg6 &= ~(CS4270_MUTE_DAC_A | CS4270_MUTE_DAC_B);
-		reg6 |= cs4270->manual_mute;
-	}
-
-	return snd_soc_write(codec, CS4270_MUTE, reg6);
-}
-
-/**
- * cs4270_soc_put_mute - put callback for the 'Master Playback switch'
- * 			 alsa control.
- * @kcontrol: mixer control
- * @ucontrol: control element information
- *
- * This function basically passes the arguments on to the generic
- * snd_soc_put_volsw() function and saves the mute information in
- * our private data structure. This is because we want to prevent
- * cs4270_dai_mute() neglecting the user's decision to manually
- * mute the codec's output.
- *
- * Returns 0 for success.
- */
-static int cs4270_soc_put_mute(struct snd_kcontrol *kcontrol,
-				struct snd_ctl_elem_value *ucontrol)
-{
-	struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int left = !ucontrol->value.integer.value[0];
-	int right = !ucontrol->value.integer.value[1];
-
-	cs4270->manual_mute = (left ? CS4270_MUTE_DAC_A : 0) |
-			      (right ? CS4270_MUTE_DAC_B : 0);
-
-	return snd_soc_put_volsw(kcontrol, ucontrol);
-}
-
-/* A list of non-DAPM controls that the CS4270 supports */
-static const struct snd_kcontrol_new cs4270_snd_controls[] = {
-	SOC_DOUBLE_R("Master Playback Volume",
-		CS4270_VOLA, CS4270_VOLB, 0, 0xFF, 1),
-	SOC_SINGLE("Digital Sidetone Switch", CS4270_FORMAT, 5, 1, 0),
-	SOC_SINGLE("Soft Ramp Switch", CS4270_TRANS, 6, 1, 0),
-	SOC_SINGLE("Zero Cross Switch", CS4270_TRANS, 5, 1, 0),
-	SOC_SINGLE("De-emphasis filter", CS4270_TRANS, 0, 1, 0),
-	SOC_SINGLE("Popguard Switch", CS4270_MODE, 0, 1, 1),
-	SOC_SINGLE("Auto-Mute Switch", CS4270_MUTE, 5, 1, 0),
-	SOC_DOUBLE("Master Capture Switch", CS4270_MUTE, 3, 4, 1, 1),
-	SOC_DOUBLE_EXT("Master Playback Switch", CS4270_MUTE, 0, 1, 1, 1,
-		snd_soc_get_volsw, cs4270_soc_put_mute),
-};
-
-static const struct snd_soc_dai_ops cs4270_dai_ops = {
-	.hw_params	= cs4270_hw_params,
-	.set_sysclk	= cs4270_set_dai_sysclk,
-	.set_fmt	= cs4270_set_dai_fmt,
-	.digital_mute	= cs4270_dai_mute,
-};
-
-static struct snd_soc_dai_driver cs4270_dai = {
-	.name = "cs4270-hifi",
-	.playback = {
-		.stream_name = "Playback",
-		.channels_min = 1,
-		.channels_max = 2,
-		.rates = SNDRV_PCM_RATE_CONTINUOUS,
-		.rate_min = 4000,
-		.rate_max = 216000,
-		.formats = CS4270_FORMATS,
-	},
-	.capture = {
-		.stream_name = "Capture",
-		.channels_min = 1,
-		.channels_max = 2,
-		.rates = SNDRV_PCM_RATE_CONTINUOUS,
-		.rate_min = 4000,
-		.rate_max = 216000,
-		.formats = CS4270_FORMATS,
-	},
-	.ops = &cs4270_dai_ops,
-};
-
-/**
- * cs4270_probe - ASoC probe function
- * @pdev: platform device
- *
- * This function is called when ASoC has all the pieces it needs to
- * instantiate a sound driver.
- */
-static int cs4270_probe(struct snd_soc_codec *codec)
-{
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int i, ret;
-
-	/* Tell ASoC what kind of I/O to use to read the registers.  ASoC will
-	 * then do the I2C transactions itself.
-	 */
-	ret = snd_soc_codec_set_cache_io(codec, 8, 8, cs4270->control_type);
-	if (ret < 0) {
-		dev_err(codec->dev, "failed to set cache I/O (ret=%i)\n", ret);
-		return ret;
-	}
-
-	/* Disable auto-mute.  This feature appears to be buggy.  In some
-	 * situations, auto-mute will not deactivate when it should, so we want
-	 * this feature disabled by default.  An application (e.g. alsactl) can
-	 * re-enabled it by using the controls.
-	 */
-	ret = snd_soc_update_bits(codec, CS4270_MUTE, CS4270_MUTE_AUTO, 0);
-	if (ret < 0) {
-		dev_err(codec->dev, "i2c write failed\n");
-		return ret;
-	}
-
-	/* Disable automatic volume control.  The hardware enables, and it
-	 * causes volume change commands to be delayed, sometimes until after
-	 * playback has started.  An application (e.g. alsactl) can
-	 * re-enabled it by using the controls.
-	 */
-	ret = snd_soc_update_bits(codec, CS4270_TRANS,
-		CS4270_TRANS_SOFT | CS4270_TRANS_ZERO, 0);
-	if (ret < 0) {
-		dev_err(codec->dev, "i2c write failed\n");
-		return ret;
-	}
-
-	/* Add the non-DAPM controls */
-	ret = snd_soc_add_codec_controls(codec, cs4270_snd_controls,
-				ARRAY_SIZE(cs4270_snd_controls));
-	if (ret < 0) {
-		dev_err(codec->dev, "failed to add controls\n");
-		return ret;
-	}
-
-	/* get the power supply regulators */
-	for (i = 0; i < ARRAY_SIZE(supply_names); i++)
-		cs4270->supplies[i].supply = supply_names[i];
-
-	ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(cs4270->supplies),
-				 cs4270->supplies);
-	if (ret < 0)
-		return ret;
-
-	ret = regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
-				    cs4270->supplies);
-	if (ret < 0)
-		goto error_free_regulators;
-
-	return 0;
-
-error_free_regulators:
-	regulator_bulk_free(ARRAY_SIZE(cs4270->supplies),
-			    cs4270->supplies);
-
-	return ret;
-}
-
-/**
- * cs4270_remove - ASoC remove function
- * @pdev: platform device
- *
- * This function is the counterpart to cs4270_probe().
- */
-static int cs4270_remove(struct snd_soc_codec *codec)
-{
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-
-	regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);
-	regulator_bulk_free(ARRAY_SIZE(cs4270->supplies), cs4270->supplies);
-
-	return 0;
-};
-
-#ifdef CONFIG_PM
-
-/* This suspend/resume implementation can handle both - a simple standby
- * where the codec remains powered, and a full suspend, where the voltage
- * domain the codec is connected to is teared down and/or any other hardware
- * reset condition is asserted.
- *
- * The codec's own power saving features are enabled in the suspend callback,
- * and all registers are written back to the hardware when resuming.
- */
-
-static int cs4270_soc_suspend(struct snd_soc_codec *codec)
-{
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int reg, ret;
-
-	reg = snd_soc_read(codec, CS4270_PWRCTL) | CS4270_PWRCTL_PDN_ALL;
-	if (reg < 0)
-		return reg;
-
-	ret = snd_soc_write(codec, CS4270_PWRCTL, reg);
-	if (ret < 0)
-		return ret;
-
-	regulator_bulk_disable(ARRAY_SIZE(cs4270->supplies),
-			       cs4270->supplies);
-
-	return 0;
-}
-
-static int cs4270_soc_resume(struct snd_soc_codec *codec)
-{
-	struct cs4270_private *cs4270 = snd_soc_codec_get_drvdata(codec);
-	int reg;
-
-	regulator_bulk_enable(ARRAY_SIZE(cs4270->supplies),
-			      cs4270->supplies);
-
-	/* In case the device was put to hard reset during sleep, we need to
-	 * wait 500ns here before any I2C communication. */
-	ndelay(500);
-
-	/* first restore the entire register cache ... */
-	snd_soc_cache_sync(codec);
-
-	/* ... then disable the power-down bits */
-	reg = snd_soc_read(codec, CS4270_PWRCTL);
-	reg &= ~CS4270_PWRCTL_PDN_ALL;
-
-	return snd_soc_write(codec, CS4270_PWRCTL, reg);
-}
-#else
-#define cs4270_soc_suspend	NULL
-#define cs4270_soc_resume	NULL
-#endif /* CONFIG_PM */
-
-/*
- * ASoC codec driver structure
- */
-static const struct snd_soc_codec_driver soc_codec_device_cs4270 = {
-	.probe =		cs4270_probe,
-	.remove =		cs4270_remove,
-	.suspend =		cs4270_soc_suspend,
-	.resume =		cs4270_soc_resume,
-	.volatile_register =	cs4270_reg_is_volatile,
-	.readable_register =	cs4270_reg_is_readable,
-	.reg_cache_size =	CS4270_LASTREG + 1,
-	.reg_word_size =	sizeof(u8),
-	.reg_cache_default =	cs4270_default_reg_cache,
-};
-
-/**
- * cs4270_i2c_probe - initialize the I2C interface of the CS4270
- * @i2c_client: the I2C client object
- * @id: the I2C device ID (ignored)
- *
- * This function is called whenever the I2C subsystem finds a device that
- * matches the device ID given via a prior call to i2c_add_driver().
- */
-static int cs4270_i2c_probe(struct i2c_client *i2c_client,
-	const struct i2c_device_id *id)
-{
-	struct cs4270_private *cs4270;
-	int ret;
-
-	/* Verify that we have a CS4270 */
-
-	ret = i2c_smbus_read_byte_data(i2c_client, CS4270_CHIPID);
-	if (ret < 0) {
-		dev_err(&i2c_client->dev, "failed to read i2c at addr %X\n",
-		       i2c_client->addr);
-		return ret;
-	}
-	/* The top four bits of the chip ID should be 1100. */
-	if ((ret & 0xF0) != 0xC0) {
-		dev_err(&i2c_client->dev, "device at addr %X is not a CS4270\n",
-		       i2c_client->addr);
-		return -ENODEV;
-	}
-
-	dev_info(&i2c_client->dev, "found device at i2c address %X\n",
-		i2c_client->addr);
-	dev_info(&i2c_client->dev, "hardware revision %X\n", ret & 0xF);
-
-	cs4270 = devm_kzalloc(&i2c_client->dev, sizeof(struct cs4270_private),
-			      GFP_KERNEL);
-	if (!cs4270) {
-		dev_err(&i2c_client->dev, "could not allocate codec\n");
-		return -ENOMEM;
-	}
-
-	i2c_set_clientdata(i2c_client, cs4270);
-	cs4270->control_type = SND_SOC_I2C;
-
-	ret = snd_soc_register_codec(&i2c_client->dev,
-			&soc_codec_device_cs4270, &cs4270_dai, 1);
-	return ret;
-}
-
-/**
- * cs4270_i2c_remove - remove an I2C device
- * @i2c_client: the I2C client object
- *
- * This function is the counterpart to cs4270_i2c_probe().
- */
-static int cs4270_i2c_remove(struct i2c_client *i2c_client)
-{
-	snd_soc_unregister_codec(&i2c_client->dev);
-	return 0;
-}
-
-/*
- * cs4270_id - I2C device IDs supported by this driver
- */
-static const struct i2c_device_id cs4270_id[] = {
-	{"cs4270", 0},
-	{}
-};
-MODULE_DEVICE_TABLE(i2c, cs4270_id);
-
-/*
- * cs4270_i2c_driver - I2C device identification
- *
- * This structure tells the I2C subsystem how to identify and support a
- * given I2C device type.
- */
-static struct i2c_driver cs4270_i2c_driver = {
-	.driver = {
-		.name = "cs4270",
-		.owner = THIS_MODULE,
-	},
-	.id_table = cs4270_id,
-	.probe = cs4270_i2c_probe,
-	.remove = cs4270_i2c_remove,
-};
-
-static int __init cs4270_init(void)
-{
-	return i2c_add_driver(&cs4270_i2c_driver);
-}
-module_init(cs4270_init);
-
-static void __exit cs4270_exit(void)
-{
-	i2c_del_driver(&cs4270_i2c_driver);
-}
-module_exit(cs4270_exit);
-
-MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
-MODULE_DESCRIPTION("Cirrus Logic CS4270 ALSA SoC Codec Driver");
-MODULE_LICENSE("GPL");