From: Raphael Poggi <[email protected]> Add possibility to choose the channel side using the device tree, and also modify it using alsa ctrl.
Signed-off-by: Raphael Poggi <[email protected]> --- 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); + return snd_soc_register_codec(&spi->dev, &soc_codec_dev_pcm1792a, &pcm1792a_dai, 1); } -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
