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linux/sound/soc/codecs/ad193x.c
Liam Girdwood f0fba2ad1b ASoC: multi-component - ASoC Multi-Component Support 
This patch extends the ASoC API to allow sound cards to have more than one
CODEC and more than one platform DMA controller. This is achieved by dividing
some current ASoC structures that contain both driver data and device data into
structures that only either contain device data or driver data. i.e.

 struct snd_soc_codec    --->  struct snd_soc_codec (device data)
                          +->  struct snd_soc_codec_driver (driver data)

 struct snd_soc_platform --->  struct snd_soc_platform (device data)
                          +->  struct snd_soc_platform_driver (driver data)

 struct snd_soc_dai      --->  struct snd_soc_dai (device data)
                          +->  struct snd_soc_dai_driver (driver data)

 struct snd_soc_device   --->  deleted

This now allows ASoC to be more tightly aligned with the Linux driver model and
also means that every ASoC codec, platform and (platform) DAI is a kernel
device. ASoC component private data is now stored as device private data.

The ASoC sound card struct snd_soc_card has also been updated to store lists
of it's components rather than a pointer to a codec and platform. The PCM
runtime struct soc_pcm_runtime now has pointers to all its components.

This patch adds DAPM support for ASoC multi-component and removes struct
snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec
or runtime PCM level basis rather than using snd_soc_socdev.

Other notable multi-component changes:-

 * Stream operations now de-reference less structures.
 * close_delayed work() now runs on a DAI basis rather than looping all DAIs
   in a card.
 * PM suspend()/resume() operations can now handle N CODECs and Platforms
   per sound card.
 * Added soc_bind_dai_link() to bind the component devices to the sound card.
 * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove
   DAI link components.
 * sysfs entries can now be registered per component per card.
 * snd_soc_new_pcms() functionailty rolled into dai_link_probe().
 * snd_soc_register_codec() now does all the codec list and mutex init.

This patch changes the probe() and remove() of the CODEC drivers as follows:-

 o Make CODEC driver a platform driver
 o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core.
 o Removed all static codec pointers (drivers now support > 1 codec dev)
 o snd_soc_register_pcms() now done by core.
 o snd_soc_register_dai() folded into snd_soc_register_codec().

CS4270 portions:
Acked-by: Timur Tabi <timur@freescale.com>

Some TLV320aic23 and Cirrus platform fixes.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>

TI CODEC and OMAP fixes
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>

Samsung platform and misc fixes :-
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>

MPC8610 and PPC fixes.
Signed-off-by: Timur Tabi <timur@freescale.com>

i.MX fixes and some core fixes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

J4740 platform fixes:-
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

CC: Tony Lindgren <tony@atomide.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Kevin Hilman <khilman@deeprootsystems.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC: Kuninori Morimoto <morimoto.kuninori@renesas.com>
CC: Daniel Gloeckner <dg@emlix.com>
CC: Manuel Lauss <mano@roarinelk.homelinux.net>
CC: Mike Frysinger <vapier.adi@gmail.com>
CC: Arnaud Patard <apatard@mandriva.com>
CC: Wan ZongShun <mcuos.com@gmail.com>

Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12 14:00:00 +01:00

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/*
* AD193X Audio Codec driver supporting AD1936/7/8/9
*
* Copyright 2010 Analog Devices Inc.
*
* Licensed under the GPL-2 or later.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include <sound/soc-dapm.h>
#include "ad193x.h"
/* codec private data */
struct ad193x_priv {
u8 reg_cache[AD193X_NUM_REGS];
enum snd_soc_control_type bus_type;
void *control_data;
int sysclk;
};
/* ad193x register cache & default register settings */
static const u8 ad193x_reg[AD193X_NUM_REGS] = {
0, 0, 0, 0, 0, 0, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0, 0, 0,
};
/*
* AD193X volume/mute/de-emphasis etc. controls
*/
static const char *ad193x_deemp[] = {"None", "48kHz", "44.1kHz", "32kHz"};
static const struct soc_enum ad193x_deemp_enum =
SOC_ENUM_SINGLE(AD193X_DAC_CTRL2, 1, 4, ad193x_deemp);
static const struct snd_kcontrol_new ad193x_snd_controls[] = {
/* DAC volume control */
SOC_DOUBLE_R("DAC1 Volume", AD193X_DAC_L1_VOL,
AD193X_DAC_R1_VOL, 0, 0xFF, 1),
SOC_DOUBLE_R("DAC2 Volume", AD193X_DAC_L2_VOL,
AD193X_DAC_R2_VOL, 0, 0xFF, 1),
SOC_DOUBLE_R("DAC3 Volume", AD193X_DAC_L3_VOL,
AD193X_DAC_R3_VOL, 0, 0xFF, 1),
SOC_DOUBLE_R("DAC4 Volume", AD193X_DAC_L4_VOL,
AD193X_DAC_R4_VOL, 0, 0xFF, 1),
/* ADC switch control */
SOC_DOUBLE("ADC1 Switch", AD193X_ADC_CTRL0, AD193X_ADCL1_MUTE,
AD193X_ADCR1_MUTE, 1, 1),
SOC_DOUBLE("ADC2 Switch", AD193X_ADC_CTRL0, AD193X_ADCL2_MUTE,
AD193X_ADCR2_MUTE, 1, 1),
/* DAC switch control */
SOC_DOUBLE("DAC1 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL1_MUTE,
AD193X_DACR1_MUTE, 1, 1),
SOC_DOUBLE("DAC2 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL2_MUTE,
AD193X_DACR2_MUTE, 1, 1),
SOC_DOUBLE("DAC3 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL3_MUTE,
AD193X_DACR3_MUTE, 1, 1),
SOC_DOUBLE("DAC4 Switch", AD193X_DAC_CHNL_MUTE, AD193X_DACL4_MUTE,
AD193X_DACR4_MUTE, 1, 1),
/* ADC high-pass filter */
SOC_SINGLE("ADC High Pass Filter Switch", AD193X_ADC_CTRL0,
AD193X_ADC_HIGHPASS_FILTER, 1, 0),
/* DAC de-emphasis */
SOC_ENUM("Playback Deemphasis", ad193x_deemp_enum),
};
static const struct snd_soc_dapm_widget ad193x_dapm_widgets[] = {
SND_SOC_DAPM_DAC("DAC", "Playback", AD193X_DAC_CTRL0, 0, 1),
SND_SOC_DAPM_ADC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_SUPPLY("PLL_PWR", AD193X_PLL_CLK_CTRL0, 0, 1, NULL, 0),
SND_SOC_DAPM_SUPPLY("ADC_PWR", AD193X_ADC_CTRL0, 0, 1, NULL, 0),
SND_SOC_DAPM_OUTPUT("DAC1OUT"),
SND_SOC_DAPM_OUTPUT("DAC2OUT"),
SND_SOC_DAPM_OUTPUT("DAC3OUT"),
SND_SOC_DAPM_OUTPUT("DAC4OUT"),
SND_SOC_DAPM_INPUT("ADC1IN"),
SND_SOC_DAPM_INPUT("ADC2IN"),
};
static const struct snd_soc_dapm_route audio_paths[] = {
{ "DAC", NULL, "PLL_PWR" },
{ "ADC", NULL, "PLL_PWR" },
{ "DAC", NULL, "ADC_PWR" },
{ "ADC", NULL, "ADC_PWR" },
{ "DAC1OUT", "DAC1 Switch", "DAC" },
{ "DAC2OUT", "DAC2 Switch", "DAC" },
{ "DAC3OUT", "DAC3 Switch", "DAC" },
{ "DAC4OUT", "DAC4 Switch", "DAC" },
{ "ADC", "ADC1 Switch", "ADC1IN" },
{ "ADC", "ADC2 Switch", "ADC2IN" },
};
/*
* DAI ops entries
*/
static int ad193x_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
int reg;
reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
reg = (mute > 0) ? reg | AD193X_DAC_MASTER_MUTE : reg &
(~AD193X_DAC_MASTER_MUTE);
snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
return 0;
}
static int ad193x_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
unsigned int rx_mask, int slots, int width)
{
struct snd_soc_codec *codec = dai->codec;
int dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
int adc_reg = snd_soc_read(codec, AD193X_ADC_CTRL2);
dac_reg &= ~AD193X_DAC_CHAN_MASK;
adc_reg &= ~AD193X_ADC_CHAN_MASK;
switch (slots) {
case 2:
dac_reg |= AD193X_DAC_2_CHANNELS << AD193X_DAC_CHAN_SHFT;
adc_reg |= AD193X_ADC_2_CHANNELS << AD193X_ADC_CHAN_SHFT;
break;
case 4:
dac_reg |= AD193X_DAC_4_CHANNELS << AD193X_DAC_CHAN_SHFT;
adc_reg |= AD193X_ADC_4_CHANNELS << AD193X_ADC_CHAN_SHFT;
break;
case 8:
dac_reg |= AD193X_DAC_8_CHANNELS << AD193X_DAC_CHAN_SHFT;
adc_reg |= AD193X_ADC_8_CHANNELS << AD193X_ADC_CHAN_SHFT;
break;
case 16:
dac_reg |= AD193X_DAC_16_CHANNELS << AD193X_DAC_CHAN_SHFT;
adc_reg |= AD193X_ADC_16_CHANNELS << AD193X_ADC_CHAN_SHFT;
break;
default:
return -EINVAL;
}
snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg);
return 0;
}
static int ad193x_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
int adc_reg1, adc_reg2, dac_reg;
adc_reg1 = snd_soc_read(codec, AD193X_ADC_CTRL1);
adc_reg2 = snd_soc_read(codec, AD193X_ADC_CTRL2);
dac_reg = snd_soc_read(codec, AD193X_DAC_CTRL1);
/* At present, the driver only support AUX ADC mode(SND_SOC_DAIFMT_I2S
* with TDM) and ADC&DAC TDM mode(SND_SOC_DAIFMT_DSP_A)
*/
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
adc_reg1 |= AD193X_ADC_SERFMT_TDM;
break;
case SND_SOC_DAIFMT_DSP_A:
adc_reg1 &= ~AD193X_ADC_SERFMT_MASK;
adc_reg1 |= AD193X_ADC_SERFMT_AUX;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF: /* normal bit clock + frame */
adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
adc_reg2 &= ~AD193X_ADC_BCLK_INV;
dac_reg &= ~AD193X_DAC_LEFT_HIGH;
dac_reg &= ~AD193X_DAC_BCLK_INV;
break;
case SND_SOC_DAIFMT_NB_IF: /* normal bclk + invert frm */
adc_reg2 |= AD193X_ADC_LEFT_HIGH;
adc_reg2 &= ~AD193X_ADC_BCLK_INV;
dac_reg |= AD193X_DAC_LEFT_HIGH;
dac_reg &= ~AD193X_DAC_BCLK_INV;
break;
case SND_SOC_DAIFMT_IB_NF: /* invert bclk + normal frm */
adc_reg2 &= ~AD193X_ADC_LEFT_HIGH;
adc_reg2 |= AD193X_ADC_BCLK_INV;
dac_reg &= ~AD193X_DAC_LEFT_HIGH;
dac_reg |= AD193X_DAC_BCLK_INV;
break;
case SND_SOC_DAIFMT_IB_IF: /* invert bclk + frm */
adc_reg2 |= AD193X_ADC_LEFT_HIGH;
adc_reg2 |= AD193X_ADC_BCLK_INV;
dac_reg |= AD193X_DAC_LEFT_HIGH;
dac_reg |= AD193X_DAC_BCLK_INV;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM: /* codec clk & frm master */
adc_reg2 |= AD193X_ADC_LCR_MASTER;
adc_reg2 |= AD193X_ADC_BCLK_MASTER;
dac_reg |= AD193X_DAC_LCR_MASTER;
dac_reg |= AD193X_DAC_BCLK_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFM: /* codec clk slave & frm master */
adc_reg2 |= AD193X_ADC_LCR_MASTER;
adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
dac_reg |= AD193X_DAC_LCR_MASTER;
dac_reg &= ~AD193X_DAC_BCLK_MASTER;
break;
case SND_SOC_DAIFMT_CBM_CFS: /* codec clk master & frame slave */
adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
adc_reg2 |= AD193X_ADC_BCLK_MASTER;
dac_reg &= ~AD193X_DAC_LCR_MASTER;
dac_reg |= AD193X_DAC_BCLK_MASTER;
break;
case SND_SOC_DAIFMT_CBS_CFS: /* codec clk & frm slave */
adc_reg2 &= ~AD193X_ADC_LCR_MASTER;
adc_reg2 &= ~AD193X_ADC_BCLK_MASTER;
dac_reg &= ~AD193X_DAC_LCR_MASTER;
dac_reg &= ~AD193X_DAC_BCLK_MASTER;
break;
default:
return -EINVAL;
}
snd_soc_write(codec, AD193X_ADC_CTRL1, adc_reg1);
snd_soc_write(codec, AD193X_ADC_CTRL2, adc_reg2);
snd_soc_write(codec, AD193X_DAC_CTRL1, dac_reg);
return 0;
}
static int ad193x_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 ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
switch (freq) {
case 12288000:
case 18432000:
case 24576000:
case 36864000:
ad193x->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int ad193x_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
int word_len = 0, reg = 0, master_rate = 0;
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
/* bit size */
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
word_len = 3;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
word_len = 1;
break;
case SNDRV_PCM_FORMAT_S24_LE:
case SNDRV_PCM_FORMAT_S32_LE:
word_len = 0;
break;
}
switch (ad193x->sysclk) {
case 12288000:
master_rate = AD193X_PLL_INPUT_256;
break;
case 18432000:
master_rate = AD193X_PLL_INPUT_384;
break;
case 24576000:
master_rate = AD193X_PLL_INPUT_512;
break;
case 36864000:
master_rate = AD193X_PLL_INPUT_768;
break;
}
reg = snd_soc_read(codec, AD193X_PLL_CLK_CTRL0);
reg = (reg & AD193X_PLL_INPUT_MASK) | master_rate;
snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, reg);
reg = snd_soc_read(codec, AD193X_DAC_CTRL2);
reg = (reg & (~AD193X_DAC_WORD_LEN_MASK)) | word_len;
snd_soc_write(codec, AD193X_DAC_CTRL2, reg);
reg = snd_soc_read(codec, AD193X_ADC_CTRL1);
reg = (reg & (~AD193X_ADC_WORD_LEN_MASK)) | word_len;
snd_soc_write(codec, AD193X_ADC_CTRL1, reg);
return 0;
}
static struct snd_soc_dai_ops ad193x_dai_ops = {
.hw_params = ad193x_hw_params,
.digital_mute = ad193x_mute,
.set_tdm_slot = ad193x_set_tdm_slot,
.set_sysclk = ad193x_set_dai_sysclk,
.set_fmt = ad193x_set_dai_fmt,
};
/* codec DAI instance */
static struct snd_soc_dai_driver ad193x_dai = {
.name = "ad193x-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 8,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 4,
.rates = SNDRV_PCM_RATE_48000,
.formats = SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S16_LE |
SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_LE,
},
.ops = &ad193x_dai_ops,
};
static int ad193x_probe(struct snd_soc_codec *codec)
{
struct ad193x_priv *ad193x = snd_soc_codec_get_drvdata(codec);
int ret;
codec->control_data = ad193x->control_data;
if (ad193x->bus_type == SND_SOC_I2C)
ret = snd_soc_codec_set_cache_io(codec, 8, 8, ad193x->bus_type);
else
ret = snd_soc_codec_set_cache_io(codec, 16, 8, ad193x->bus_type);
if (ret < 0) {
dev_err(codec->dev, "failed to set cache I/O: %d\n",
ret);
kfree(ad193x);
return ret;
}
/* default setting for ad193x */
/* unmute dac channels */
snd_soc_write(codec, AD193X_DAC_CHNL_MUTE, 0x0);
/* de-emphasis: 48kHz, powedown dac */
snd_soc_write(codec, AD193X_DAC_CTRL2, 0x1A);
/* powerdown dac, dac in tdm mode */
snd_soc_write(codec, AD193X_DAC_CTRL0, 0x41);
/* high-pass filter enable */
snd_soc_write(codec, AD193X_ADC_CTRL0, 0x3);
/* sata delay=1, adc aux mode */
snd_soc_write(codec, AD193X_ADC_CTRL1, 0x43);
/* pll input: mclki/xi */
snd_soc_write(codec, AD193X_PLL_CLK_CTRL0, 0x99); /* mclk=24.576Mhz: 0x9D; mclk=12.288Mhz: 0x99 */
snd_soc_write(codec, AD193X_PLL_CLK_CTRL1, 0x04);
snd_soc_add_controls(codec, ad193x_snd_controls,
ARRAY_SIZE(ad193x_snd_controls));
snd_soc_dapm_new_controls(codec, ad193x_dapm_widgets,
ARRAY_SIZE(ad193x_dapm_widgets));
snd_soc_dapm_add_routes(codec, audio_paths, ARRAY_SIZE(audio_paths));
return ret;
}
static struct snd_soc_codec_driver soc_codec_dev_ad193x = {
.probe = ad193x_probe,
.reg_cache_default = ad193x_reg,
.reg_cache_size = AD193X_NUM_REGS,
.reg_word_size = sizeof(u16),
};
#if defined(CONFIG_SPI_MASTER)
static int __devinit ad193x_spi_probe(struct spi_device *spi)
{
struct ad193x_priv *ad193x;
int ret;
ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
if (ad193x == NULL)
return -ENOMEM;
spi_set_drvdata(spi, ad193x);
ad193x->control_data = spi;
ad193x->bus_type = SND_SOC_SPI;
ret = snd_soc_register_codec(&spi->dev,
&soc_codec_dev_ad193x, &ad193x_dai, 1);
if (ret < 0)
kfree(ad193x);
return ret;
}
static int __devexit ad193x_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
kfree(spi_get_drvdata(spi));
return 0;
}
static struct spi_driver ad193x_spi_driver = {
.driver = {
.name = "ad193x-codec",
.owner = THIS_MODULE,
},
.probe = ad193x_spi_probe,
.remove = __devexit_p(ad193x_spi_remove),
};
#endif
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static const struct i2c_device_id ad193x_id[] = {
{ "ad1936", 0 },
{ "ad1937", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, ad193x_id);
static int __devinit ad193x_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct ad193x_priv *ad193x;
int ret;
ad193x = kzalloc(sizeof(struct ad193x_priv), GFP_KERNEL);
if (ad193x == NULL)
return -ENOMEM;
i2c_set_clientdata(client, ad193x);
ad193x->control_data = client;
ad193x->bus_type = SND_SOC_I2C;
ret = snd_soc_register_codec(&client->dev,
&soc_codec_dev_ad193x, &ad193x_dai, 1);
if (ret < 0)
kfree(ad193x);
return ret;
}
static int __devexit ad193x_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
kfree(i2c_get_clientdata(client));
return 0;
}
static struct i2c_driver ad193x_i2c_driver = {
.driver = {
.name = "ad193x-codec",
},
.probe = ad193x_i2c_probe,
.remove = __devexit_p(ad193x_i2c_remove),
.id_table = ad193x_id,
};
#endif
static int __init ad193x_modinit(void)
{
int ret;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&ad193x_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register AD193X I2C driver: %d\n",
ret);
}
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&ad193x_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register AD193X SPI driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(ad193x_modinit);
static void __exit ad193x_modexit(void)
{
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&ad193x_spi_driver);
#endif
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&ad193x_i2c_driver);
#endif
}
module_exit(ad193x_modexit);
MODULE_DESCRIPTION("ASoC ad193x driver");
MODULE_AUTHOR("Barry Song <21cnbao@gmail.com>");
MODULE_LICENSE("GPL");
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