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Date: Tue, 19 Jan 2016 11:50:35 +0100
From: Michael Trimarchi <michael@...rulasolutions.com>
To: Jacob Siverskog <jacob@...nage.engineering>
Cc: Liam Girdwood <lgirdwood@...il.com>,
Mark Brown <broonie@...nel.org>,
Jaroslav Kysela <perex@...ex.cz>,
Takashi Iwai <tiwai@...e.com>, Johan Hovold <johan@...nel.org>,
"alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 2/3] ASoC: pcm179x: Add I2C interface driver
Hi Jacob
On Tue, Jan 19, 2016 at 11:29 AM, Jacob Siverskog
<jacob@...nage.engineering> wrote:
> The PCM179x family supports both SPI and I2C. This patch adds support
> for the I2C interface.
>
> Reviewed-by: Johan Hovold <johan@...nel.org>
> Signed-off-by: Jacob Siverskog <jacob@...nage.engineering>
> ---
> .../devicetree/bindings/sound/pcm179x.txt | 11 ++-
> sound/soc/codecs/Kconfig | 9 +++
> sound/soc/codecs/Makefile | 2 +
> sound/soc/codecs/pcm179x-i2c.c | 82 ++++++++++++++++++++++
> 4 files changed, 103 insertions(+), 1 deletion(-)
> create mode 100644 sound/soc/codecs/pcm179x-i2c.c
>
> diff --git a/Documentation/devicetree/bindings/sound/pcm179x.txt b/Documentation/devicetree/bindings/sound/pcm179x.txt
> index 4ae70d3..436c2b2 100644
> --- a/Documentation/devicetree/bindings/sound/pcm179x.txt
> +++ b/Documentation/devicetree/bindings/sound/pcm179x.txt
> @@ -1,6 +1,6 @@
> Texas Instruments pcm179x DT bindings
>
> -This driver supports the SPI bus.
> +This driver supports both the I2C and SPI bus.
>
> Required properties:
>
> @@ -9,6 +9,11 @@ Required properties:
> For required properties on SPI, please consult
> Documentation/devicetree/bindings/spi/spi-bus.txt
>
> +Required properties on I2C:
> +
> + - reg: the I2C address
> +
> +
> Examples:
>
> codec_spi: 1792a@0 {
> @@ -16,3 +21,7 @@ Examples:
> spi-max-frequency = <600000>;
> };
>
> + codec_i2c: 1792a@4c {
> + compatible = "ti,pcm1792a";
> + reg = <0x4c>;
> + };
> diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
> index eaf13cb..45269cc 100644
> --- a/sound/soc/codecs/Kconfig
> +++ b/sound/soc/codecs/Kconfig
> @@ -87,6 +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_I2C if I2C
> select SND_SOC_PCM179X_SPI if SPI_MASTER
> select SND_SOC_PCM3008
> select SND_SOC_PCM3168A_I2C if I2C
> @@ -529,6 +530,14 @@ config SND_SOC_PCM1681
> config SND_SOC_PCM179X
> tristate
>
> +config SND_SOC_PCM179X_I2C
> + tristate "Texas Instruments PCM179X CODEC family (I2C)"
> + depends on I2C
> + select SND_SOC_PCM179X
> + help
> + Enable support for Texas Instruments PCM179x CODEC family.
> + Select this if your PCM179x is connected via an I2C bus.
> +
> config SND_SOC_PCM179X_SPI
> tristate "Texas Instruments PCM179X CODEC family (SPI)"
> depends on SPI_MASTER
> diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
> index 56e94d8..9acd777 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-i2c-objs := pcm179x-i2c.o
> snd-soc-pcm179x-spi-objs := pcm179x-spi.o
> snd-soc-pcm3008-objs := pcm3008.o
> snd-soc-pcm3168a-objs := pcm3168a.o
> @@ -286,6 +287,7 @@ 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-$(CONFIG_SND_SOC_PCM179X_I2C) += snd-soc-pcm179x-i2c.o
> obj-$(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
> diff --git a/sound/soc/codecs/pcm179x-i2c.c b/sound/soc/codecs/pcm179x-i2c.c
> new file mode 100644
> index 0000000..5a5d61a
> --- /dev/null
> +++ b/sound/soc/codecs/pcm179x-i2c.c
> @@ -0,0 +1,82 @@
> +/*
> + * PCM179X ASoC I2C driver
> + *
> + * Copyright (c) Teenage Engineering AB 2016
> + *
> + * Jacob Siverskog <jacob@...nage.engineering>
> + *
> + * 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/i2c.h>
> +#include <linux/regmap.h>
> +
> +#include "pcm179x.h"
> +
> +static int pcm179x_i2c_probe(struct i2c_client *client,
> + const struct i2c_device_id *id)
> +{
> + struct pcm179x_private *pcm179x;
> + int ret;
> +
> + pcm179x = devm_kzalloc(&client->dev, sizeof(struct pcm179x_private),
> + GFP_KERNEL);
> + if (!pcm179x)
> + return -ENOMEM;
> +
> + i2c_set_clientdata(client, pcm179x);
> +
> + pcm179x->dev = &client->dev;
> +
> + pcm179x->regmap = devm_regmap_init_i2c(client, &pcm179x_regmap_config);
> + if (IS_ERR(pcm179x->regmap)) {
> + ret = PTR_ERR(pcm179x->regmap);
> + dev_err(&client->dev, "Failed to register regmap: %d\n", ret);
> + return ret;
> + }
> +
sound/soc/codecs/adau1781-spi.c
I like more how was done here for private data and codec data. What do
you think?
Michael
> + return pcm179x_common_init(pcm179x);
> +}
> +
> +static int pcm179x_i2c_remove(struct i2c_client *client)
> +{
> + return pcm179x_common_exit(i2c_get_clientdata(client));
> +}
> +
> +static const struct of_device_id pcm179x_of_match[] = {
> + { .compatible = "ti,pcm1792a", },
> + { }
> +};
> +MODULE_DEVICE_TABLE(of, pcm179x_of_match);
> +
> +static const struct i2c_device_id pcm179x_i2c_ids[] = {
> + { "pcm179x", 0 },
> + { }
> +};
> +MODULE_DEVICE_TABLE(i2c, pcm179x_i2c_ids);
> +
> +static struct i2c_driver pcm179x_i2c_driver = {
> + .driver = {
> + .name = "pcm179x",
> + .of_match_table = of_match_ptr(pcm179x_of_match),
> + },
> + .id_table = pcm179x_i2c_ids,
> + .probe = pcm179x_i2c_probe,
> + .remove = pcm179x_i2c_remove,
> +};
> +
> +module_i2c_driver(pcm179x_i2c_driver);
> +
> +MODULE_DESCRIPTION("ASoC PCM179X I2C driver");
> +MODULE_AUTHOR("Jacob Siverskog <jacob@...nage.engineering>");
> +MODULE_LICENSE("GPL");
> --
> 2.7.0
>
--
| Michael Nazzareno Trimarchi Amarula Solutions BV |
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