diff options
| -rw-r--r-- | Documentation/devicetree/bindings/sound/simple-card.txt | 37 | ||||
| -rw-r--r-- | sound/soc/generic/simple-card.c | 34 |
2 files changed, 71 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt index cf3979eb3578..5ecdde6d9f63 100644 --- a/Documentation/devicetree/bindings/sound/simple-card.txt +++ b/Documentation/devicetree/bindings/sound/simple-card.txt @@ -22,6 +22,8 @@ Optional properties: headphones are attached. - simple-audio-card,mic-det-gpio : Reference to GPIO that signals when a microphone is attached. +- simple-audio-card,aux-devs : List of phandles pointing to auxiliary devices, such + as amplifiers, to be added to the sound card. Optional subnodes: @@ -162,3 +164,38 @@ sound { }; }; }; + +Example 3 - route audio from IMX6 SSI2 through TLV320DAC3100 codec +through TPA6130A2 amplifier to headphones: + +&i2c0 { + codec: tlv320dac3100@18 { + compatible = "ti,tlv320dac3100"; + ... + } + + amp: tpa6130a2@60 { + compatible = "ti,tpa6130a2"; + ... + } +} + +sound { + compatible = "simple-audio-card"; + ... + simple-audio-card,widgets = + "Headphone", "Headphone Jack"; + simple-audio-card,routing = + "Headphone Jack", "HPLEFT", + "Headphone Jack", "HPRIGHT", + "LEFTIN", "HPL", + "RIGHTIN", "HPR"; + simple-audio-card,aux-devs = <&>; + simple-audio-card,cpu { + sound-dai = <&ssi2>; + }; + simple-audio-card,codec { + sound-dai = <&codec>; + clocks = ... + }; +}; diff --git a/sound/soc/generic/simple-card.c b/sound/soc/generic/simple-card.c index fe0bc5c469e2..f608f8d23f3d 100644 --- a/sound/soc/generic/simple-card.c +++ b/sound/soc/generic/simple-card.c @@ -318,6 +318,36 @@ dai_link_of_err: return ret; } +static int asoc_simple_card_parse_aux_devs(struct device_node *node, + struct simple_card_data *priv) +{ + struct device *dev = simple_priv_to_dev(priv); + struct device_node *aux_node; + int i, n, len; + + if (!of_find_property(node, PREFIX "aux-devs", &len)) + return 0; /* Ok to have no aux-devs */ + + n = len / sizeof(__be32); + if (n <= 0) + return -EINVAL; + + priv->snd_card.aux_dev = devm_kzalloc(dev, + n * sizeof(*priv->snd_card.aux_dev), GFP_KERNEL); + if (!priv->snd_card.aux_dev) + return -ENOMEM; + + for (i = 0; i < n; i++) { + aux_node = of_parse_phandle(node, PREFIX "aux-devs", i); + if (!aux_node) + return -EINVAL; + priv->snd_card.aux_dev[i].codec_of_node = aux_node; + } + + priv->snd_card.num_aux_devs = n; + return 0; +} + static int asoc_simple_card_parse_of(struct device_node *node, struct simple_card_data *priv) { @@ -372,6 +402,10 @@ static int asoc_simple_card_parse_of(struct device_node *node, } ret = asoc_simple_card_parse_card_name(&priv->snd_card, PREFIX); + if (ret < 0) + goto card_parse_end; + + ret = asoc_simple_card_parse_aux_devs(node, priv); card_parse_end: of_node_put(dai_link); |