[alsa-devel] [PATCH v4 1/3] ASoC: pcm179x: Split into core and SPI parts
Jacob Siverskog
jacob at teenage.engineering
Fri Jan 22 13:39:53 CET 2016
The pcm179x family supports both SPI and I2C for configuration. This
patch splits the driver into core and SPI parts, in preparation for
I2C support.
Reviewed-by: Johan Hovold <johan at kernel.org>
Signed-off-by: Jacob Siverskog <jacob at teenage.engineering>
---
sound/soc/codecs/Kconfig | 11 +++++--
sound/soc/codecs/Makefile | 2 ++
sound/soc/codecs/pcm179x-spi.c | 72 ++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/pcm179x.c | 52 +++++++-----------------------
sound/soc/codecs/pcm179x.h | 5 +++
5 files changed, 99 insertions(+), 43 deletions(-)
create mode 100644 sound/soc/codecs/pcm179x-spi.c
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 50693c8..ae720f1 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -87,7 +87,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_ML26124 if I2C
select SND_SOC_NAU8825 if I2C
select SND_SOC_PCM1681 if I2C
- select SND_SOC_PCM179X if SPI_MASTER
+ select SND_SOC_PCM179X_SPI if SPI_MASTER
select SND_SOC_PCM3008
select SND_SOC_PCM3168A_I2C if I2C
select SND_SOC_PCM3168A_SPI if SPI_MASTER
@@ -527,8 +527,15 @@ config SND_SOC_PCM1681
depends on I2C
config SND_SOC_PCM179X
- tristate "Texas Instruments PCM179X CODEC"
+ tristate
+
+config SND_SOC_PCM179X_SPI
+ tristate "Texas Instruments PCM179X CODEC (SPI)"
depends on SPI_MASTER
+ select SND_SOC_PCM179X
+ help
+ Enable support for Texas Instruments PCM179x CODEC.
+ Select this if your PCM179x is connected via an SPI bus.
config SND_SOC_PCM3008
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index d44f7d3..56e94d8 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -81,6 +81,7 @@ snd-soc-ml26124-objs := ml26124.o
snd-soc-nau8825-objs := nau8825.o
snd-soc-pcm1681-objs := pcm1681.o
snd-soc-pcm179x-codec-objs := pcm179x.o
+snd-soc-pcm179x-spi-objs := pcm179x-spi.o
snd-soc-pcm3008-objs := pcm3008.o
snd-soc-pcm3168a-objs := pcm3168a.o
snd-soc-pcm3168a-i2c-objs := pcm3168a-i2c.o
@@ -285,6 +286,7 @@ obj-$(CONFIG_SND_SOC_ML26124) += snd-soc-ml26124.o
obj-$(CONFIG_SND_SOC_NAU8825) += snd-soc-nau8825.o
obj-$(CONFIG_SND_SOC_PCM1681) += snd-soc-pcm1681.o
obj-$(CONFIG_SND_SOC_PCM179X) += snd-soc-pcm179x-codec.o
+obj-$(CONFIG_SND_SOC_PCM179X_SPI) += snd-soc-pcm179x-spi.o
obj-$(CONFIG_SND_SOC_PCM3008) += snd-soc-pcm3008.o
obj-$(CONFIG_SND_SOC_PCM3168A) += snd-soc-pcm3168a.o
obj-$(CONFIG_SND_SOC_PCM3168A_I2C) += snd-soc-pcm3168a-i2c.o
diff --git a/sound/soc/codecs/pcm179x-spi.c b/sound/soc/codecs/pcm179x-spi.c
new file mode 100644
index 0000000..da924d4
--- /dev/null
+++ b/sound/soc/codecs/pcm179x-spi.c
@@ -0,0 +1,72 @@
+/*
+ * PCM179X ASoC SPI driver
+ *
+ * Copyright (c) Amarula Solutions B.V. 2013
+ *
+ * Michael Trimarchi <michael at amarulasolutions.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation; either version 2
+ * of the License, or (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+
+#include "pcm179x.h"
+
+static int pcm179x_spi_probe(struct spi_device *spi)
+{
+ struct regmap *regmap;
+ int ret;
+
+ regmap = devm_regmap_init_spi(spi, &pcm179x_regmap_config);
+ if (IS_ERR(regmap)) {
+ ret = PTR_ERR(regmap);
+ dev_err(&spi->dev, "Failed to allocate regmap: %d\n", ret);
+ return ret;
+ }
+
+ return pcm179x_common_init(&spi->dev, regmap);
+}
+
+static int pcm179x_spi_remove(struct spi_device *spi)
+{
+ return pcm179x_common_exit(&spi->dev);
+}
+
+static const struct of_device_id pcm179x_of_match[] = {
+ { .compatible = "ti,pcm1792a", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, pcm179x_of_match);
+
+static const struct spi_device_id pcm179x_spi_ids[] = {
+ { "pcm179x", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids);
+
+static struct spi_driver pcm179x_spi_driver = {
+ .driver = {
+ .name = "pcm179x",
+ .of_match_table = of_match_ptr(pcm179x_of_match),
+ },
+ .id_table = pcm179x_spi_ids,
+ .probe = pcm179x_spi_probe,
+ .remove = pcm179x_spi_remove,
+};
+
+module_spi_driver(pcm179x_spi_driver);
+
+MODULE_DESCRIPTION("ASoC PCM179X SPI driver");
+MODULE_AUTHOR("Michael Trimarchi <michael at amarulasolutions.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/pcm179x.c b/sound/soc/codecs/pcm179x.c
index a56c7b7..8f20f70 100644
--- a/sound/soc/codecs/pcm179x.c
+++ b/sound/soc/codecs/pcm179x.c
@@ -20,7 +20,6 @@
#include <linux/slab.h>
#include <linux/kernel.h>
#include <linux/device.h>
-#include <linux/spi/spi.h>
#include <sound/core.h>
#include <sound/pcm.h>
@@ -29,7 +28,6 @@
#include <sound/soc.h>
#include <sound/tlv.h>
#include <linux/of.h>
-#include <linux/of_device.h>
#include "pcm179x.h"
@@ -194,13 +192,7 @@ static struct snd_soc_dai_driver pcm179x_dai = {
.ops = &pcm179x_dai_ops,
};
-static const struct of_device_id pcm179x_of_match[] = {
- { .compatible = "ti,pcm1792a", },
- { }
-};
-MODULE_DEVICE_TABLE(of, pcm179x_of_match);
-
-static const struct regmap_config pcm179x_regmap = {
+const struct regmap_config pcm179x_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 23,
@@ -209,6 +201,7 @@ static const struct regmap_config pcm179x_regmap = {
.writeable_reg = pcm179x_writeable_reg,
.readable_reg = pcm179x_accessible_reg,
};
+EXPORT_SYMBOL_GPL(pcm179x_regmap_config);
static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
.controls = pcm179x_controls,
@@ -219,52 +212,29 @@ static struct snd_soc_codec_driver soc_codec_dev_pcm179x = {
.num_dapm_routes = ARRAY_SIZE(pcm179x_dapm_routes),
};
-static int pcm179x_spi_probe(struct spi_device *spi)
+int pcm179x_common_init(struct device *dev, struct regmap *regmap)
{
struct pcm179x_private *pcm179x;
- int ret;
- pcm179x = devm_kzalloc(&spi->dev, sizeof(struct pcm179x_private),
+ pcm179x = devm_kzalloc(dev, sizeof(struct pcm179x_private),
GFP_KERNEL);
if (!pcm179x)
return -ENOMEM;
- spi_set_drvdata(spi, pcm179x);
-
- pcm179x->regmap = devm_regmap_init_spi(spi, &pcm179x_regmap);
- if (IS_ERR(pcm179x->regmap)) {
- ret = PTR_ERR(pcm179x->regmap);
- dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
- return ret;
- }
+ pcm179x->regmap = regmap;
+ dev_set_drvdata(dev, pcm179x);
- return snd_soc_register_codec(&spi->dev,
+ return snd_soc_register_codec(dev,
&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
}
+EXPORT_SYMBOL_GPL(pcm179x_common_init);
-static int pcm179x_spi_remove(struct spi_device *spi)
+int pcm179x_common_exit(struct device *dev)
{
- snd_soc_unregister_codec(&spi->dev);
+ snd_soc_unregister_codec(dev);
return 0;
}
-
-static const struct spi_device_id pcm179x_spi_ids[] = {
- { "pcm179x", 0 },
- { },
-};
-MODULE_DEVICE_TABLE(spi, pcm179x_spi_ids);
-
-static struct spi_driver pcm179x_codec_driver = {
- .driver = {
- .name = "pcm179x",
- .of_match_table = of_match_ptr(pcm179x_of_match),
- },
- .id_table = pcm179x_spi_ids,
- .probe = pcm179x_spi_probe,
- .remove = pcm179x_spi_remove,
-};
-
-module_spi_driver(pcm179x_codec_driver);
+EXPORT_SYMBOL_GPL(pcm179x_common_exit);
MODULE_DESCRIPTION("ASoC PCM179X driver");
MODULE_AUTHOR("Michael Trimarchi <michael at amarulasolutions.com>");
diff --git a/sound/soc/codecs/pcm179x.h b/sound/soc/codecs/pcm179x.h
index c6fdc06..c4eea4d 100644
--- a/sound/soc/codecs/pcm179x.h
+++ b/sound/soc/codecs/pcm179x.h
@@ -24,4 +24,9 @@
#define PCM1792A_FORMATS (SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S16_LE)
+extern const struct regmap_config pcm179x_regmap_config;
+
+int pcm179x_common_init(struct device *dev, struct regmap *regmap);
+int pcm179x_common_exit(struct device *dev);
+
#endif
--
2.7.0
More information about the Alsa-devel
mailing list