Hi
On Fri, Nov 20, 2015 at 11:09 AM, Raphael Poggi <poggi.raph@xxxxxxxxx> wrote:
> From: Raphael Poggi <poggi.raph@xxxxxxxxx>
>
> Add possibility to choose the channel side using the device tree,
> and also modify it using alsa ctrl.
>
> Signed-off-by: Raphael Poggi <poggi.raph@xxxxxxxxx>
> ---
> sound/soc/codecs/pcm1792a.c | 46 +++++++++++++++++++++++++++++++++++++++++++++
> 1 file changed, 46 insertions(+)
>
> diff --git a/sound/soc/codecs/pcm1792a.c b/sound/soc/codecs/pcm1792a.c
> index febaa48..005b679 100644
> --- a/sound/soc/codecs/pcm1792a.c
> +++ b/sound/soc/codecs/pcm1792a.c
> @@ -65,6 +65,12 @@ static const struct reg_default pcm1792a_reg_defaults[] = {
> { PCM1792A_DEVICE_ID, 0x00 },
> };
>
> +enum __pcm1792_side {
> + STEREO,
> + MONORAL_LEFT,
> + MONORAL_RIGHT
> +};
> +
> static bool pcm1792a_accessible_reg(struct device *dev, unsigned int reg)
> {
> return reg >= 0x10 && reg <= 0x17;
> @@ -83,6 +89,7 @@ struct pcm1792a_private {
> struct regmap *regmap;
> unsigned int format;
> unsigned int rate;
> + unsigned int side;
> };
>
> static int pcm1792a_set_dai_fmt(struct snd_soc_dai *codec_dai,
> @@ -153,6 +160,13 @@ static int pcm1792a_hw_params(struct snd_pcm_substream *substream,
> ret = regmap_update_bits(priv->regmap, PCM1792A_FMT_CONTROL,
> PCM1792A_FMT_MASK | PCM1792A_ATLD_ENABLE, val);
>
> + if (priv->side == MONORAL_LEFT)
> + val = PCM1792A_CHANNEL_MONO_LEFT;
> + else if (priv->side == MONORAL_RIGHT)
> + val = PCM1792A_CHANNEL_MONO_RIGHT;
> +
> + regmap_update_bits(priv->regmap, PCM1792A_CHANNEL, PCM1792A_CHANNEL_MONO_MASK, val);
> +
> return ret;
> }
>
> @@ -222,10 +236,31 @@ static struct snd_soc_codec_driver soc_codec_dev_pcm1792a = {
> .num_dapm_routes = ARRAY_SIZE(pcm1792a_dapm_routes),
> };
>
> +static int pcm1792a_of_init(struct spi_device *spi)
> +{
> + int ret = 0;
> + struct pcm1792a_private *pcm1792a = dev_get_drvdata(&spi->dev);
> + const char *name;
> + struct device_node *np = spi->dev.of_node;
> +
> + name = of_get_property(np, "ti,side", NULL);
> + if (name) {
> + if (!strcmp(name, "left"))
> + pcm1792a->side = MONORAL_LEFT;
> + else
> + pcm1792a->side = MONORAL_RIGHT;
> + }
> + else
> + pcm1792a->side = STEREO;
> +
> + return ret;
> +}
> +
> static int pcm1792a_spi_probe(struct spi_device *spi)
> {
> struct pcm1792a_private *pcm1792a;
> int ret;
> + struct device_node *np = spi->dev.of_node;
>
> pcm1792a = devm_kzalloc(&spi->dev, sizeof(struct pcm1792a_private),
> GFP_KERNEL);
> @@ -241,6 +276,17 @@ static int pcm1792a_spi_probe(struct spi_device *spi)
> return ret;
> }
>
> + if (np) {
> + ret = pcm1792a_of_init(spi);
> + if (ret)
> + return ret;
> + }
> +
> + if (pcm1792a->side == MONORAL_LEFT)
> + regmap_update_bits(pcm1792a->regmap, PCM1792A_CHANNEL, PCM1792A_CHANNEL_MONO_MASK, PCM1792A_CHANNEL_MONO_LEFT);
> + else if (pcm1792a->side == MONORAL_RIGHT)
> + regmap_update_bits(pcm1792a->regmap, PCM1792A_CHANNEL, PCM1792A_CHANNEL_MONO_MASK, PCM1792A_CHANNEL_MONO_RIGHT);
> +
Why this is a part of dts and not a part of mixer control?
Michael
> return snd_soc_register_codec(&spi->dev,
> &soc_codec_dev_pcm1792a, &pcm1792a_dai, 1);
> }
> --
> 2.1.0
>
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