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authorNikita Yushchenko <nikita.yoush@cogentembedded.com>2016-09-26 12:56:51 +0300
committerMark Brown <broonie@kernel.org>2016-09-26 09:04:14 -0700
commit899a247cf6d5bbb9eb799261791441d7d5ea2099 (patch)
tree90641000368d883f44b6a43aa4d59f43275845db /sound
parentb0133d9c4d7600fa43499c12897136fb4f38fd57 (diff)
downloadblackbird-op-linux-899a247cf6d5bbb9eb799261791441d7d5ea2099.tar.gz
blackbird-op-linux-899a247cf6d5bbb9eb799261791441d7d5ea2099.zip
ASoC: simple-card: add support for aux devices
Add device tree property to define auxiliary devices to be added to simle-audio-card. Together with proper audio routing definition, this allows to use simple-card in setups where separate amplifier chip is connected to codec's output. Signed-off-by: Nikita Yushchenko <nikita.yoush@cogentembedded.com> Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'sound')
-rw-r--r--sound/soc/generic/simple-card.c34
1 files changed, 34 insertions, 0 deletions
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);
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