diff options
| -rw-r--r-- | include/sound/simple_card_utils.h | 1 | ||||
| -rw-r--r-- | sound/soc/generic/simple-card-utils.c | 28 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h index 6b780346eaa7..03d07541d958 100644 --- a/include/sound/simple_card_utils.h +++ b/include/sound/simple_card_utils.h @@ -180,6 +180,7 @@ int asoc_simple_init_priv(struct asoc_simple_priv *priv, int asoc_simple_remove(struct platform_device *pdev); int asoc_graph_card_probe(struct snd_soc_card *card); +int asoc_graph_is_ports0(struct device_node *port); #ifdef DEBUG static inline void asoc_simple_debug_dai(struct asoc_simple_priv *priv, diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c index 10c63b73900c..fd893d20ccc7 100644 --- a/sound/soc/generic/simple-card-utils.c +++ b/sound/soc/generic/simple-card-utils.c @@ -759,6 +759,34 @@ int asoc_graph_card_probe(struct snd_soc_card *card) } EXPORT_SYMBOL_GPL(asoc_graph_card_probe); +int asoc_graph_is_ports0(struct device_node *np) +{ + struct device_node *port, *ports, *ports0, *top; + int ret; + + /* np is "endpoint" or "port" */ + if (of_node_name_eq(np, "endpoint")) { + port = of_get_parent(np); + } else { + port = np; + of_node_get(port); + } + + ports = of_get_parent(port); + top = of_get_parent(ports); + ports0 = of_get_child_by_name(top, "ports"); + + ret = ports0 == ports; + + of_node_put(port); + of_node_put(ports); + of_node_put(ports0); + of_node_put(top); + + return ret; +} +EXPORT_SYMBOL_GPL(asoc_graph_is_ports0); + /* Module information */ MODULE_AUTHOR("Kuninori Morimoto <[email protected]>"); MODULE_DESCRIPTION("ALSA SoC Simple Card Utils"); |