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 SPI 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 --- sound/soc/blackfin/Kconfig | 3 +- sound/soc/codecs/Kconfig | 11 ++++- sound/soc/codecs/Makefile | 4 ++ sound/soc/codecs/adav801.c | 53 ++++++++++++++++++++ sound/soc/codecs/adav803.c | 50 +++++++++++++++++++ sound/soc/codecs/adav80x.c | 117 +++------------------------------------------ sound/soc/codecs/adav80x.h | 7 +++ 7 files changed, 133 insertions(+), 112 deletions(-) create mode 100644 sound/soc/codecs/adav801.c create mode 100644 sound/soc/codecs/adav803.c
diff --git a/sound/soc/blackfin/Kconfig b/sound/soc/blackfin/Kconfig index 89f7748..6347d59 100644 --- a/sound/soc/blackfin/Kconfig +++ b/sound/soc/blackfin/Kconfig @@ -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 && SND_SOC_I2C_AND_SPI 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 diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig index a9b75c5..6d01f91 100644 --- a/sound/soc/codecs/Kconfig +++ b/sound/soc/codecs/Kconfig @@ -23,7 +23,8 @@ 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 @@ -213,6 +214,14 @@ 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
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile index 6be463b..c33cf8a 100644 --- a/sound/soc/codecs/Makefile +++ b/sound/soc/codecs/Makefile @@ -10,6 +10,8 @@ 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 @@ -146,6 +148,8 @@ 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 diff --git a/sound/soc/codecs/adav801.c b/sound/soc/codecs/adav801.c new file mode 100644 index 0000000..790fce3 --- /dev/null +++ b/sound/soc/codecs/adav801.c @@ -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"); diff --git a/sound/soc/codecs/adav803.c b/sound/soc/codecs/adav803.c new file mode 100644 index 0000000..66d9fce --- /dev/null +++ b/sound/soc/codecs/adav803.c @@ -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"); diff --git a/sound/soc/codecs/adav80x.c b/sound/soc/codecs/adav80x.c index a4bd051..09d5609 100644 --- a/sound/soc/codecs/adav80x.c +++ b/sound/soc/codecs/adav80x.c @@ -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"); diff --git a/sound/soc/codecs/adav80x.h b/sound/soc/codecs/adav80x.h index adb0fc7..8a1d7c0 100644 --- a/sound/soc/codecs/adav80x.h +++ b/sound/soc/codecs/adav80x.h @@ -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,