OpenE2K
/
linux
6
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

ASoC: adav80x: Split SPI and I2C code into different modules 

There are a few known (minor) problems with having the support code for both I2C
and SPI in the same module:
    * We need to be extra careful to make sure to not build the driver into the
      kernel if one of the subsystems is build as a module (Currently only I2C
      can be build as a module).
    * The module init path error handling is rather ugly. E.g. what should be
      done if either the SPI or the I2C driver fails to register. Most drivers
      that implement SPI and I2C in the same module currently fallback to
      undefined behavior in that case. Splitting the the driver into two
      modules, one for each bus, allows the registration of the other bus drive
      to continue without problems if one of them fails.

This patch splits the ADAV80X driver into 3 modules. One core module that
implements the device logic, but is independent of the bus method used. And one
module for SPI and I2C each that registers the drivers and sets up the regmap
struct for the bus.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Lars-Peter Clausen 2014-02-17 13:16:56 +01:00 committed by Mark Brown
parent f96a5d3f1c
commit 0c2d696456
7 changed files with 133 additions and 112 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
sound/soc/blackfin/Kconfig
View File

@ -47,7 +47,8 @@ config SND_SOC_BFIN_EVAL_ADAV80X
tristate "Support for the EVAL-ADAV80X boards on Blackfin eval boards"
depends on SND_BF5XX_I2S && (SPI_MASTER || I2C)
select SND_BF5XX_SOC_I2S
select SND_SOC_ADAV80X
select SND_SOC_ADAV801 if SPI_MASTER
select SND_SOC_ADAV803 if I2C
help
Say Y if you want to add support for the Analog Devices EVAL-ADAV801 or
EVAL-ADAV803 board connected to one of the Blackfin evaluation boards

11
sound/soc/codecs/Kconfig
View File

@ -20,7 +20,8 @@ config SND_SOC_ALL_CODECS
select SND_SOC_AD1980 if SND_SOC_AC97_BUS
select SND_SOC_AD73311
select SND_SOC_ADAU1373 if I2C
select SND_SOC_ADAV80X if SND_SOC_I2C_AND_SPI
select SND_SOC_ADAV801 if SPI_MASTER
select SND_SOC_ADAV803 if I2C
select SND_SOC_ADAU1701 if I2C
select SND_SOC_ADS117X
select SND_SOC_AK4104 if SPI_MASTER
@ -198,6 +199,14 @@ config SND_SOC_ADAU1373
config SND_SOC_ADAV80X
tristate
config SND_SOC_ADAV801
tristate
select SND_SOC_ADAV80X
config SND_SOC_ADAV803
tristate
select SND_SOC_ADAV80X
config SND_SOC_ADS117X
tristate

4
sound/soc/codecs/Makefile
View File

@ -8,6 +8,8 @@ snd-soc-ad73311-objs := ad73311.o
snd-soc-adau1701-objs := adau1701.o
snd-soc-adau1373-objs := adau1373.o
snd-soc-adav80x-objs := adav80x.o
snd-soc-adav801-objs := adav801.o
snd-soc-adav803-objs := adav803.o
snd-soc-ads117x-objs := ads117x.o
snd-soc-ak4104-objs := ak4104.o
snd-soc-ak4535-objs := ak4535.o
@ -139,6 +141,8 @@ obj-$(CONFIG_SND_SOC_AD73311) += snd-soc-ad73311.o
obj-$(CONFIG_SND_SOC_ADAU1373) += snd-soc-adau1373.o
obj-$(CONFIG_SND_SOC_ADAU1701) += snd-soc-adau1701.o
obj-$(CONFIG_SND_SOC_ADAV80X) += snd-soc-adav80x.o
obj-$(CONFIG_SND_SOC_ADAV801) += snd-soc-adav801.o
obj-$(CONFIG_SND_SOC_ADAV803) += snd-soc-adav803.o
obj-$(CONFIG_SND_SOC_ADS117X) += snd-soc-ads117x.o
obj-$(CONFIG_SND_SOC_AK4104) += snd-soc-ak4104.o
obj-$(CONFIG_SND_SOC_AK4535) += snd-soc-ak4535.o

53
sound/soc/codecs/adav801.c Normal file
View File

@ -0,0 +1,53 @@
/*
* ADAV801 audio driver
*
* Copyright 2014 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include "adav80x.h"
static const struct spi_device_id adav80x_spi_id[] = {
{ "adav801", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, adav80x_spi_id);
static int adav80x_spi_probe(struct spi_device *spi)
{
struct regmap_config config;
config = adav80x_regmap_config;
config.read_flag_mask = 0x01;
return adav80x_bus_probe(&spi->dev, devm_regmap_init_spi(spi, &config));
}
static int adav80x_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
return 0;
}
static struct spi_driver adav80x_spi_driver = {
.driver = {
.name = "adav801",
.owner = THIS_MODULE,
},
.probe = adav80x_spi_probe,
.remove = adav80x_spi_remove,
.id_table = adav80x_spi_id,
};
module_spi_driver(adav80x_spi_driver);
MODULE_DESCRIPTION("ASoC ADAV801 driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_AUTHOR("Yi Li <yi.li@analog.com>>");
MODULE_LICENSE("GPL");

50
sound/soc/codecs/adav803.c Normal file
View File

@ -0,0 +1,50 @@
/*
* ADAV803 audio driver
*
* Copyright 2014 Analog Devices Inc.
*
* Licensed under the GPL-2.
*/
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/regmap.h>
#include <sound/soc.h>
#include "adav80x.h"
static const struct i2c_device_id adav803_id[] = {
{ "adav803", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adav803_id);
static int adav803_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
return adav80x_bus_probe(&client->dev,
devm_regmap_init_i2c(client, &adav80x_regmap_config));
}
static int adav803_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static struct i2c_driver adav803_driver = {
.driver = {
.name = "adav803",
.owner = THIS_MODULE,
},
.probe = adav803_probe,
.remove = adav803_remove,
.id_table = adav803_id,
};
module_i2c_driver(adav803_driver);
MODULE_DESCRIPTION("ASoC ADAV803 driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
MODULE_AUTHOR("Yi Li <yi.li@analog.com>>");
MODULE_LICENSE("GPL");

117
sound/soc/codecs/adav80x.c
View File

@ -8,17 +8,15 @@
* Licensed under the GPL-2 or later.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/i2c.h>
#include <linux/spi/spi.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/tlv.h>
#include <sound/soc.h>
#include <sound/tlv.h>
#include "adav80x.h"
@ -864,10 +862,9 @@ static struct snd_soc_codec_driver adav80x_codec_driver = {
.num_dapm_routes = ARRAY_SIZE(adav80x_dapm_routes),
};
static int adav80x_bus_probe(struct device *dev, struct regmap *regmap)
int adav80x_bus_probe(struct device *dev, struct regmap *regmap)
{
struct adav80x *adav80x;
int ret;
if (IS_ERR(regmap))
return PTR_ERR(regmap);
@ -882,9 +879,9 @@ static int adav80x_bus_probe(struct device *dev, struct regmap *regmap)
return snd_soc_register_codec(dev, &adav80x_codec_driver,
adav80x_dais, ARRAY_SIZE(adav80x_dais));
}
EXPORT_SYMBOL_GPL(adav80x_bus_probe);
#if defined(CONFIG_SPI_MASTER)
static const struct regmap_config adav80x_spi_regmap_config = {
const struct regmap_config adav80x_regmap_config = {
.val_bits = 8,
.pad_bits = 1,
.reg_bits = 7,
@ -896,107 +893,7 @@ static const struct regmap_config adav80x_spi_regmap_config = {
.reg_defaults = adav80x_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(adav80x_reg_defaults),
};
static const struct spi_device_id adav80x_spi_id[] = {
{ "adav801", 0 },
{ }
};
MODULE_DEVICE_TABLE(spi, adav80x_spi_id);
static int adav80x_spi_probe(struct spi_device *spi)
{
return adav80x_bus_probe(&spi->dev,
devm_regmap_init_spi(spi, &adav80x_spi_regmap_config));
}
static int adav80x_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(dev);
return 0;
}
static struct spi_driver adav80x_spi_driver = {
.driver = {
.name = "adav801",
.owner = THIS_MODULE,
},
.probe = adav80x_spi_probe,
.remove = adav80x_spi_remove,
.id_table = adav80x_spi_id,
};
#endif
#if IS_ENABLED(CONFIG_I2C)
static const struct regmap_config adav80x_i2c_regmap_config = {
.val_bits = 8,
.pad_bits = 1,
.reg_bits = 7,
.max_register = ADAV80X_PLL_OUTE,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = adav80x_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(adav80x_reg_defaults),
};
static const struct i2c_device_id adav80x_i2c_id[] = {
{ "adav803", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, adav80x_i2c_id);
static int adav80x_i2c_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
return adav80x_bus_probe(&client->dev,
devm_regmap_init_i2c(client, &adav80x_i2c_regmap_config));
}
static int adav80x_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(dev);
return 0;
}
static struct i2c_driver adav80x_i2c_driver = {
.driver = {
.name = "adav803",
.owner = THIS_MODULE,
},
.probe = adav80x_i2c_probe,
.remove = adav80x_i2c_remove,
.id_table = adav80x_i2c_id,
};
#endif
static int __init adav80x_init(void)
{
int ret = 0;
#if IS_ENABLED(CONFIG_I2C)
ret = i2c_add_driver(&adav80x_i2c_driver);
if (ret)
return ret;
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&adav80x_spi_driver);
#endif
return ret;
}
module_init(adav80x_init);
static void __exit adav80x_exit(void)
{
#if IS_ENABLED(CONFIG_I2C)
i2c_del_driver(&adav80x_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&adav80x_spi_driver);
#endif
}
module_exit(adav80x_exit);
EXPORT_SYMBOL_GPL(adav80x_regmap_config);
MODULE_DESCRIPTION("ASoC ADAV80x driver");
MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");

7
sound/soc/codecs/adav80x.h
View File

@ -9,6 +9,13 @@
#ifndef _ADAV80X_H
#define _ADAV80X_H
#include <linux/regmap.h>
struct device;
extern const struct regmap_config adav80x_regmap_config;
int adav80x_bus_probe(struct device *dev, struct regmap *regmap);
enum adav80x_pll_src {
ADAV80X_PLL_SRC_XIN,
ADAV80X_PLL_SRC_XTAL,