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linux-stable/sound/soc/codecs/cs42xx8.c
Charles Keepax 03d2ec460f ASoC: cs42xx8: Mark chip ID as volatile and remove cache bypass 
Rather than manually enabling cache bypass when reading the ID registers
simply remove the default which will cause the first read to go to the
hardware. The old code worked this is simply the more standard way to
implement this. There is a comment included in the code that claims the
chip ID register also contains the right input volume, however this is
clearly not the case from the rest of the driver. Further investigation
reveals exactly the same comment in the wm8962 driver, where this is the
case, so this is almost certainly a copy and paste error from when the
driver was created.

Signed-off-by: Charles Keepax <ckeepax@opensource.wolfsonmicro.com>
Acked-by: Brian Austin <brian.austin@cirrus.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
2016-10-25 20:13:36 +01:00

602 lines
17 KiB
C
Raw Blame History

/*
* Cirrus Logic CS42448/CS42888 Audio CODEC Digital Audio Interface (DAI) driver
*
* Copyright (C) 2014 Freescale Semiconductor, Inc.
*
* Author: Nicolin Chen <Guangyu.Chen@freescale.com>
*
* 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.
*/
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/regulator/consumer.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "cs42xx8.h"
#define CS42XX8_NUM_SUPPLIES 4
static const char *const cs42xx8_supply_names[CS42XX8_NUM_SUPPLIES] = {
"VA",
"VD",
"VLS",
"VLC",
};
#define CS42XX8_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
/* codec private data */
struct cs42xx8_priv {
struct regulator_bulk_data supplies[CS42XX8_NUM_SUPPLIES];
const struct cs42xx8_driver_data *drvdata;
struct regmap *regmap;
struct clk *clk;
bool slave_mode;
unsigned long sysclk;
u32 tx_channels;
};
/* -127.5dB to 0dB with step of 0.5dB */
static const DECLARE_TLV_DB_SCALE(dac_tlv, -12750, 50, 1);
/* -64dB to 24dB with step of 0.5dB */
static const DECLARE_TLV_DB_SCALE(adc_tlv, -6400, 50, 0);
static const char *const cs42xx8_adc_single[] = { "Differential", "Single-Ended" };
static const char *const cs42xx8_szc[] = { "Immediate Change", "Zero Cross",
"Soft Ramp", "Soft Ramp on Zero Cross" };
static const struct soc_enum adc1_single_enum =
SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 4, 2, cs42xx8_adc_single);
static const struct soc_enum adc2_single_enum =
SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 3, 2, cs42xx8_adc_single);
static const struct soc_enum adc3_single_enum =
SOC_ENUM_SINGLE(CS42XX8_ADCCTL, 2, 2, cs42xx8_adc_single);
static const struct soc_enum dac_szc_enum =
SOC_ENUM_SINGLE(CS42XX8_TXCTL, 5, 4, cs42xx8_szc);
static const struct soc_enum adc_szc_enum =
SOC_ENUM_SINGLE(CS42XX8_TXCTL, 0, 4, cs42xx8_szc);
static const struct snd_kcontrol_new cs42xx8_snd_controls[] = {
SOC_DOUBLE_R_TLV("DAC1 Playback Volume", CS42XX8_VOLAOUT1,
CS42XX8_VOLAOUT2, 0, 0xff, 1, dac_tlv),
SOC_DOUBLE_R_TLV("DAC2 Playback Volume", CS42XX8_VOLAOUT3,
CS42XX8_VOLAOUT4, 0, 0xff, 1, dac_tlv),
SOC_DOUBLE_R_TLV("DAC3 Playback Volume", CS42XX8_VOLAOUT5,
CS42XX8_VOLAOUT6, 0, 0xff, 1, dac_tlv),
SOC_DOUBLE_R_TLV("DAC4 Playback Volume", CS42XX8_VOLAOUT7,
CS42XX8_VOLAOUT8, 0, 0xff, 1, dac_tlv),
SOC_DOUBLE_R_S_TLV("ADC1 Capture Volume", CS42XX8_VOLAIN1,
CS42XX8_VOLAIN2, 0, -0x80, 0x30, 7, 0, adc_tlv),
SOC_DOUBLE_R_S_TLV("ADC2 Capture Volume", CS42XX8_VOLAIN3,
CS42XX8_VOLAIN4, 0, -0x80, 0x30, 7, 0, adc_tlv),
SOC_DOUBLE("DAC1 Invert Switch", CS42XX8_DACINV, 0, 1, 1, 0),
SOC_DOUBLE("DAC2 Invert Switch", CS42XX8_DACINV, 2, 3, 1, 0),
SOC_DOUBLE("DAC3 Invert Switch", CS42XX8_DACINV, 4, 5, 1, 0),
SOC_DOUBLE("DAC4 Invert Switch", CS42XX8_DACINV, 6, 7, 1, 0),
SOC_DOUBLE("ADC1 Invert Switch", CS42XX8_ADCINV, 0, 1, 1, 0),
SOC_DOUBLE("ADC2 Invert Switch", CS42XX8_ADCINV, 2, 3, 1, 0),
SOC_SINGLE("ADC High-Pass Filter Switch", CS42XX8_ADCCTL, 7, 1, 1),
SOC_SINGLE("DAC De-emphasis Switch", CS42XX8_ADCCTL, 5, 1, 0),
SOC_ENUM("ADC1 Single Ended Mode Switch", adc1_single_enum),
SOC_ENUM("ADC2 Single Ended Mode Switch", adc2_single_enum),
SOC_SINGLE("DAC Single Volume Control Switch", CS42XX8_TXCTL, 7, 1, 0),
SOC_ENUM("DAC Soft Ramp & Zero Cross Control Switch", dac_szc_enum),
SOC_SINGLE("DAC Auto Mute Switch", CS42XX8_TXCTL, 4, 1, 0),
SOC_SINGLE("Mute ADC Serial Port Switch", CS42XX8_TXCTL, 3, 1, 0),
SOC_SINGLE("ADC Single Volume Control Switch", CS42XX8_TXCTL, 2, 1, 0),
SOC_ENUM("ADC Soft Ramp & Zero Cross Control Switch", adc_szc_enum),
};
static const struct snd_kcontrol_new cs42xx8_adc3_snd_controls[] = {
SOC_DOUBLE_R_S_TLV("ADC3 Capture Volume", CS42XX8_VOLAIN5,
CS42XX8_VOLAIN6, 0, -0x80, 0x30, 7, 0, adc_tlv),
SOC_DOUBLE("ADC3 Invert Switch", CS42XX8_ADCINV, 4, 5, 1, 0),
SOC_ENUM("ADC3 Single Ended Mode Switch", adc3_single_enum),
};
static const struct snd_soc_dapm_widget cs42xx8_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC1", "Playback", CS42XX8_PWRCTL, 1, 1),
SND_SOC_DAPM_DAC("DAC2", "Playback", CS42XX8_PWRCTL, 2, 1),
SND_SOC_DAPM_DAC("DAC3", "Playback", CS42XX8_PWRCTL, 3, 1),
SND_SOC_DAPM_DAC("DAC4", "Playback", CS42XX8_PWRCTL, 4, 1),
SND_SOC_DAPM_OUTPUT("AOUT1L"),
SND_SOC_DAPM_OUTPUT("AOUT1R"),
SND_SOC_DAPM_OUTPUT("AOUT2L"),
SND_SOC_DAPM_OUTPUT("AOUT2R"),
SND_SOC_DAPM_OUTPUT("AOUT3L"),
SND_SOC_DAPM_OUTPUT("AOUT3R"),
SND_SOC_DAPM_OUTPUT("AOUT4L"),
SND_SOC_DAPM_OUTPUT("AOUT4R"),
SND_SOC_DAPM_ADC("ADC1", "Capture", CS42XX8_PWRCTL, 5, 1),
SND_SOC_DAPM_ADC("ADC2", "Capture", CS42XX8_PWRCTL, 6, 1),
SND_SOC_DAPM_INPUT("AIN1L"),
SND_SOC_DAPM_INPUT("AIN1R"),
SND_SOC_DAPM_INPUT("AIN2L"),
SND_SOC_DAPM_INPUT("AIN2R"),
SND_SOC_DAPM_SUPPLY("PWR", CS42XX8_PWRCTL, 0, 1, NULL, 0),
};
static const struct snd_soc_dapm_widget cs42xx8_adc3_dapm_widgets[] = {
SND_SOC_DAPM_ADC("ADC3", "Capture", CS42XX8_PWRCTL, 7, 1),
SND_SOC_DAPM_INPUT("AIN3L"),
SND_SOC_DAPM_INPUT("AIN3R"),
};
static const struct snd_soc_dapm_route cs42xx8_dapm_routes[] = {
/* Playback */
{ "AOUT1L", NULL, "DAC1" },
{ "AOUT1R", NULL, "DAC1" },
{ "DAC1", NULL, "PWR" },
{ "AOUT2L", NULL, "DAC2" },
{ "AOUT2R", NULL, "DAC2" },
{ "DAC2", NULL, "PWR" },
{ "AOUT3L", NULL, "DAC3" },
{ "AOUT3R", NULL, "DAC3" },
{ "DAC3", NULL, "PWR" },
{ "AOUT4L", NULL, "DAC4" },
{ "AOUT4R", NULL, "DAC4" },
{ "DAC4", NULL, "PWR" },
/* Capture */
{ "ADC1", NULL, "AIN1L" },
{ "ADC1", NULL, "AIN1R" },
{ "ADC1", NULL, "PWR" },
{ "ADC2", NULL, "AIN2L" },
{ "ADC2", NULL, "AIN2R" },
{ "ADC2", NULL, "PWR" },
};
static const struct snd_soc_dapm_route cs42xx8_adc3_dapm_routes[] = {
/* Capture */
{ "ADC3", NULL, "AIN3L" },
{ "ADC3", NULL, "AIN3R" },
{ "ADC3", NULL, "PWR" },
};
struct cs42xx8_ratios {
unsigned int ratio;
unsigned char speed;
unsigned char mclk;
};
static const struct cs42xx8_ratios cs42xx8_ratios[] = {
{ 64, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_256(4) },
{ 96, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_384(4) },
{ 128, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_512(4) },
{ 192, CS42XX8_FM_QUAD, CS42XX8_FUNCMOD_MFREQ_768(4) },
{ 256, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_256(1) },
{ 384, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_384(1) },
{ 512, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_512(1) },
{ 768, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_768(1) },
{ 1024, CS42XX8_FM_SINGLE, CS42XX8_FUNCMOD_MFREQ_1024(1) }
};
static int cs42xx8_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 cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
cs42xx8->sysclk = freq;
return 0;
}
static int cs42xx8_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
u32 val;
/* Set DAI format */
switch (format & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_LEFT_J:
val = CS42XX8_INTF_DAC_DIF_LEFTJ | CS42XX8_INTF_ADC_DIF_LEFTJ;
break;
case SND_SOC_DAIFMT_I2S:
val = CS42XX8_INTF_DAC_DIF_I2S | CS42XX8_INTF_ADC_DIF_I2S;
break;
case SND_SOC_DAIFMT_RIGHT_J:
val = CS42XX8_INTF_DAC_DIF_RIGHTJ | CS42XX8_INTF_ADC_DIF_RIGHTJ;
break;
case SND_SOC_DAIFMT_DSP_A:
val = CS42XX8_INTF_DAC_DIF_TDM | CS42XX8_INTF_ADC_DIF_TDM;
break;
default:
dev_err(codec->dev, "unsupported dai format\n");
return -EINVAL;
}
regmap_update_bits(cs42xx8->regmap, CS42XX8_INTF,
CS42XX8_INTF_DAC_DIF_MASK |
CS42XX8_INTF_ADC_DIF_MASK, val);
/* Set master/slave audio interface */
switch (format & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
cs42xx8->slave_mode = true;
break;
case SND_SOC_DAIFMT_CBM_CFM:
cs42xx8->slave_mode = false;
break;
default:
dev_err(codec->dev, "unsupported master/slave mode\n");
return -EINVAL;
}
return 0;
}
static int cs42xx8_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;
struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
u32 ratio = cs42xx8->sysclk / params_rate(params);
u32 i, fm, val, mask;
if (tx)
cs42xx8->tx_channels = params_channels(params);
for (i = 0; i < ARRAY_SIZE(cs42xx8_ratios); i++) {
if (cs42xx8_ratios[i].ratio == ratio)
break;
}
if (i == ARRAY_SIZE(cs42xx8_ratios)) {
dev_err(codec->dev, "unsupported sysclk ratio\n");
return -EINVAL;
}
mask = CS42XX8_FUNCMOD_MFREQ_MASK;
val = cs42xx8_ratios[i].mclk;
fm = cs42xx8->slave_mode ? CS42XX8_FM_AUTO : cs42xx8_ratios[i].speed;
regmap_update_bits(cs42xx8->regmap, CS42XX8_FUNCMOD,
CS42XX8_FUNCMOD_xC_FM_MASK(tx) | mask,
CS42XX8_FUNCMOD_xC_FM(tx, fm) | val);
return 0;
}
static int cs42xx8_digital_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
u8 dac_unmute = cs42xx8->tx_channels ?
~((0x1 << cs42xx8->tx_channels) - 1) : 0;
regmap_write(cs42xx8->regmap, CS42XX8_DACMUTE,
mute ? CS42XX8_DACMUTE_ALL : dac_unmute);
return 0;
}
static const struct snd_soc_dai_ops cs42xx8_dai_ops = {
.set_fmt = cs42xx8_set_dai_fmt,
.set_sysclk = cs42xx8_set_dai_sysclk,
.hw_params = cs42xx8_hw_params,
.digital_mute = cs42xx8_digital_mute,
};
static struct snd_soc_dai_driver cs42xx8_dai = {
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = CS42XX8_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.rates = SNDRV_PCM_RATE_8000_192000,
.formats = CS42XX8_FORMATS,
},
.ops = &cs42xx8_dai_ops,
};
static const struct reg_default cs42xx8_reg[] = {
{ 0x02, 0x00 }, /* Power Control */
{ 0x03, 0xF0 }, /* Functional Mode */
{ 0x04, 0x46 }, /* Interface Formats */
{ 0x05, 0x00 }, /* ADC Control & DAC De-Emphasis */
{ 0x06, 0x10 }, /* Transition Control */
{ 0x07, 0x00 }, /* DAC Channel Mute */
{ 0x08, 0x00 }, /* Volume Control AOUT1 */
{ 0x09, 0x00 }, /* Volume Control AOUT2 */
{ 0x0a, 0x00 }, /* Volume Control AOUT3 */
{ 0x0b, 0x00 }, /* Volume Control AOUT4 */
{ 0x0c, 0x00 }, /* Volume Control AOUT5 */
{ 0x0d, 0x00 }, /* Volume Control AOUT6 */
{ 0x0e, 0x00 }, /* Volume Control AOUT7 */
{ 0x0f, 0x00 }, /* Volume Control AOUT8 */
{ 0x10, 0x00 }, /* DAC Channel Invert */
{ 0x11, 0x00 }, /* Volume Control AIN1 */
{ 0x12, 0x00 }, /* Volume Control AIN2 */
{ 0x13, 0x00 }, /* Volume Control AIN3 */
{ 0x14, 0x00 }, /* Volume Control AIN4 */
{ 0x15, 0x00 }, /* Volume Control AIN5 */
{ 0x16, 0x00 }, /* Volume Control AIN6 */
{ 0x17, 0x00 }, /* ADC Channel Invert */
{ 0x18, 0x00 }, /* Status Control */
{ 0x1a, 0x00 }, /* Status Mask */
{ 0x1b, 0x00 }, /* MUTEC Pin Control */
};
static bool cs42xx8_volatile_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS42XX8_STATUS:
return true;
default:
return false;
}
}
static bool cs42xx8_writeable_register(struct device *dev, unsigned int reg)
{
switch (reg) {
case CS42XX8_CHIPID:
case CS42XX8_STATUS:
return false;
default:
return true;
}
}
const struct regmap_config cs42xx8_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = CS42XX8_LASTREG,
.reg_defaults = cs42xx8_reg,
.num_reg_defaults = ARRAY_SIZE(cs42xx8_reg),
.volatile_reg = cs42xx8_volatile_register,
.writeable_reg = cs42xx8_writeable_register,
.cache_type = REGCACHE_RBTREE,
};
EXPORT_SYMBOL_GPL(cs42xx8_regmap_config);
static int cs42xx8_codec_probe(struct snd_soc_codec *codec)
{
struct cs42xx8_priv *cs42xx8 = snd_soc_codec_get_drvdata(codec);
struct snd_soc_dapm_context *dapm = snd_soc_codec_get_dapm(codec);
switch (cs42xx8->drvdata->num_adcs) {
case 3:
snd_soc_add_codec_controls(codec, cs42xx8_adc3_snd_controls,
ARRAY_SIZE(cs42xx8_adc3_snd_controls));
snd_soc_dapm_new_controls(dapm, cs42xx8_adc3_dapm_widgets,
ARRAY_SIZE(cs42xx8_adc3_dapm_widgets));
snd_soc_dapm_add_routes(dapm, cs42xx8_adc3_dapm_routes,
ARRAY_SIZE(cs42xx8_adc3_dapm_routes));
break;
default:
break;
}
/* Mute all DAC channels */
regmap_write(cs42xx8->regmap, CS42XX8_DACMUTE, CS42XX8_DACMUTE_ALL);
return 0;
}
static const struct snd_soc_codec_driver cs42xx8_driver = {
.probe = cs42xx8_codec_probe,
.idle_bias_off = true,
.component_driver = {
.controls = cs42xx8_snd_controls,
.num_controls = ARRAY_SIZE(cs42xx8_snd_controls),
.dapm_widgets = cs42xx8_dapm_widgets,
.num_dapm_widgets = ARRAY_SIZE(cs42xx8_dapm_widgets),
.dapm_routes = cs42xx8_dapm_routes,
.num_dapm_routes = ARRAY_SIZE(cs42xx8_dapm_routes),
},
};
const struct cs42xx8_driver_data cs42448_data = {
.name = "cs42448",
.num_adcs = 3,
};
EXPORT_SYMBOL_GPL(cs42448_data);
const struct cs42xx8_driver_data cs42888_data = {
.name = "cs42888",
.num_adcs = 2,
};
EXPORT_SYMBOL_GPL(cs42888_data);
const struct of_device_id cs42xx8_of_match[] = {
{ .compatible = "cirrus,cs42448", .data = &cs42448_data, },
{ .compatible = "cirrus,cs42888", .data = &cs42888_data, },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, cs42xx8_of_match);
EXPORT_SYMBOL_GPL(cs42xx8_of_match);
int cs42xx8_probe(struct device *dev, struct regmap *regmap)
{
const struct of_device_id *of_id;
struct cs42xx8_priv *cs42xx8;
int ret, val, i;
if (IS_ERR(regmap)) {
ret = PTR_ERR(regmap);
dev_err(dev, "failed to allocate regmap: %d\n", ret);
return ret;
}
cs42xx8 = devm_kzalloc(dev, sizeof(*cs42xx8), GFP_KERNEL);
if (cs42xx8 == NULL)
return -ENOMEM;
cs42xx8->regmap = regmap;
dev_set_drvdata(dev, cs42xx8);
of_id = of_match_device(cs42xx8_of_match, dev);
if (of_id)
cs42xx8->drvdata = of_id->data;
if (!cs42xx8->drvdata) {
dev_err(dev, "failed to find driver data\n");
return -EINVAL;
}
cs42xx8->clk = devm_clk_get(dev, "mclk");
if (IS_ERR(cs42xx8->clk)) {
dev_err(dev, "failed to get the clock: %ld\n",
PTR_ERR(cs42xx8->clk));
return -EINVAL;
}
cs42xx8->sysclk = clk_get_rate(cs42xx8->clk);
for (i = 0; i < ARRAY_SIZE(cs42xx8->supplies); i++)
cs42xx8->supplies[i].supply = cs42xx8_supply_names[i];
ret = devm_regulator_bulk_get(dev,
ARRAY_SIZE(cs42xx8->supplies), cs42xx8->supplies);
if (ret) {
dev_err(dev, "failed to request supplies: %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
if (ret) {
dev_err(dev, "failed to enable supplies: %d\n", ret);
return ret;
}
/* Make sure hardware reset done */
msleep(5);
/* Validate the chip ID */
ret = regmap_read(cs42xx8->regmap, CS42XX8_CHIPID, &val);
if (ret < 0) {
dev_err(dev, "failed to get device ID, ret = %d", ret);
goto err_enable;
}
/* The top four bits of the chip ID should be 0000 */
if (((val & CS42XX8_CHIPID_CHIP_ID_MASK) >> 4) != 0x00) {
dev_err(dev, "unmatched chip ID: %d\n",
(val & CS42XX8_CHIPID_CHIP_ID_MASK) >> 4);
ret = -EINVAL;
goto err_enable;
}
dev_info(dev, "found device, revision %X\n",
val & CS42XX8_CHIPID_REV_ID_MASK);
cs42xx8_dai.name = cs42xx8->drvdata->name;
/* Each adc supports stereo input */
cs42xx8_dai.capture.channels_max = cs42xx8->drvdata->num_adcs * 2;
ret = snd_soc_register_codec(dev, &cs42xx8_driver, &cs42xx8_dai, 1);
if (ret) {
dev_err(dev, "failed to register codec:%d\n", ret);
goto err_enable;
}
regcache_cache_only(cs42xx8->regmap, true);
err_enable:
regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
return ret;
}
EXPORT_SYMBOL_GPL(cs42xx8_probe);
#ifdef CONFIG_PM
static int cs42xx8_runtime_resume(struct device *dev)
{
struct cs42xx8_priv *cs42xx8 = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(cs42xx8->clk);
if (ret) {
dev_err(dev, "failed to enable mclk: %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
if (ret) {
dev_err(dev, "failed to enable supplies: %d\n", ret);
goto err_clk;
}
/* Make sure hardware reset done */
msleep(5);
regcache_cache_only(cs42xx8->regmap, false);
ret = regcache_sync(cs42xx8->regmap);
if (ret) {
dev_err(dev, "failed to sync regmap: %d\n", ret);
goto err_bulk;
}
return 0;
err_bulk:
regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
err_clk:
clk_disable_unprepare(cs42xx8->clk);
return ret;
}
static int cs42xx8_runtime_suspend(struct device *dev)
{
struct cs42xx8_priv *cs42xx8 = dev_get_drvdata(dev);
regcache_cache_only(cs42xx8->regmap, true);
regulator_bulk_disable(ARRAY_SIZE(cs42xx8->supplies),
cs42xx8->supplies);
clk_disable_unprepare(cs42xx8->clk);
return 0;
}
#endif
const struct dev_pm_ops cs42xx8_pm = {
SET_RUNTIME_PM_OPS(cs42xx8_runtime_suspend, cs42xx8_runtime_resume, NULL)
};
EXPORT_SYMBOL_GPL(cs42xx8_pm);
MODULE_DESCRIPTION("Cirrus Logic CS42448/CS42888 ALSA SoC Codec Driver");
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_LICENSE("GPL");
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