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Subject[PATCH 1/3] ASoC: pcm179x: Split into core and SPI parts
Date
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@kernel.org>
Signed-off-by: Jacob Siverskog <jacob@teenage.engineering>
---
sound/soc/codecs/Kconfig | 11 ++++--
sound/soc/codecs/Makefile | 2 ++
sound/soc/codecs/pcm179x-spi.c | 81 ++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/pcm179x.c | 60 ++++---------------------------
sound/soc/codecs/pcm179x.h | 12 +++++++
5 files changed, 110 insertions(+), 56 deletions(-)
create mode 100644 sound/soc/codecs/pcm179x-spi.c

diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index 50693c8..eaf13cb 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 family (SPI)"
depends on SPI_MASTER
+ select SND_SOC_PCM179X
+ help
+ Enable support for Texas Instruments PCM179x CODEC family.
+ 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..73641f5
--- /dev/null
+++ b/sound/soc/codecs/pcm179x-spi.c
@@ -0,0 +1,81 @@
+/*
+ * PCM179X ASoC SPI driver
+ *
+ * Copyright (c) Amarula Solutions B.V. 2013
+ *
+ * Michael Trimarchi <michael@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 pcm179x_private *pcm179x;
+ int ret;
+
+ pcm179x = devm_kzalloc(&spi->dev, sizeof(struct pcm179x_private),
+ GFP_KERNEL);
+ if (!pcm179x)
+ return -ENOMEM;
+
+ spi_set_drvdata(spi, pcm179x);
+
+ pcm179x->dev = &spi->dev;
+
+ pcm179x->regmap = devm_regmap_init_spi(spi, &pcm179x_regmap_config);
+ if (IS_ERR(pcm179x->regmap)) {
+ ret = PTR_ERR(pcm179x->regmap);
+ dev_err(&spi->dev, "Failed to register regmap: %d\n", ret);
+ return ret;
+ }
+
+ return pcm179x_common_init(pcm179x);
+}
+
+static int pcm179x_spi_remove(struct spi_device *spi)
+{
+ return pcm179x_common_exit(spi_get_drvdata(spi));
+}
+
+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@amarulasolutions.com>");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/pcm179x.c b/sound/soc/codecs/pcm179x.c
index a56c7b7..08bc6e0 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"

@@ -70,12 +68,6 @@ static bool pcm179x_writeable_reg(struct device *dev, unsigned register reg)
return accessible && reg != 0x16 && reg != 0x17;
}

-struct pcm179x_private {
- struct regmap *regmap;
- unsigned int format;
- unsigned int rate;
-};
-
static int pcm179x_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int format)
{
@@ -194,13 +186,7 @@ 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 +195,7 @@ 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,
@@ -219,53 +206,18 @@ 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 pcm179x_private *priv)
{
- struct pcm179x_private *pcm179x;
- int ret;
-
- pcm179x = devm_kzalloc(&spi->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;
- }
-
- return snd_soc_register_codec(&spi->dev,
+ return snd_soc_register_codec(priv->dev,
&soc_codec_dev_pcm179x, &pcm179x_dai, 1);
}

-static int pcm179x_spi_remove(struct spi_device *spi)
+int pcm179x_common_exit(struct pcm179x_private *priv)
{
- snd_soc_unregister_codec(&spi->dev);
+ snd_soc_unregister_codec(priv->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);
-
MODULE_DESCRIPTION("ASoC PCM179X driver");
MODULE_AUTHOR("Michael Trimarchi <michael@amarulasolutions.com>");
MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/pcm179x.h b/sound/soc/codecs/pcm179x.h
index c6fdc06..d1536e0 100644
--- a/sound/soc/codecs/pcm179x.h
+++ b/sound/soc/codecs/pcm179x.h
@@ -17,6 +17,13 @@
#ifndef __PCM179X_H__
#define __PCM179X_H__

+struct pcm179x_private {
+ struct device *dev;
+ struct regmap *regmap;
+ unsigned int format;
+ unsigned int rate;
+};
+
#define PCM1792A_RATES (SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_8000_48000 | \
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
SNDRV_PCM_RATE_192000)
@@ -24,4 +31,9 @@
#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 pcm179x_private *priv);
+int pcm179x_common_exit(struct pcm179x_private *priv);
+
#endif
--
2.7.0

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