ASoC: add snd_soc_register_component()

Current ASoC has register function for platform/codec/dai/card,
but doesn't have for cpu.
It often produces confusion and fault on ASoC.

As result of ASoC community discussion,
we consider new struct snd_soc_component for CPU/CODEC,
and will switch over to use it.

This patch adds very basic struct snd_soc_component,
and register function for it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Acked-by: Liam Girdwood <liam.r.girdwood@linux.intel.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

1 files changed, 77 insertions, 0 deletions

diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index b7e84a7cd9ee..9e6118573fef 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -58,6 +58,7 @@ static DEFINE_MUTEX(client_mutex);
 static LIST_HEAD(dai_list);
 static LIST_HEAD(platform_list);
 static LIST_HEAD(codec_list);
+static LIST_HEAD(component_list);
 
 /*
  * This is a timeout to do a DAPM powerdown after a stream is closed().
@@ -4137,6 +4138,82 @@ found:
 }
 EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
 
+
+/**
+ * snd_soc_register_component - Register a component with the ASoC core
+ *
+ */
+int snd_soc_register_component(struct device *dev,
+                         const struct snd_soc_component_driver *cmpnt_drv,
+                         struct snd_soc_dai_driver *dai_drv,
+                         int num_dai)
+{
+        struct snd_soc_component *cmpnt;
+        int ret;
+
+        dev_dbg(dev, "component register %s\n", dev_name(dev));
+
+        cmpnt = devm_kzalloc(dev, sizeof(*cmpnt), GFP_KERNEL);
+        if (!cmpnt) {
+                dev_err(dev, "ASoC: Failed to allocate memory\n");
+                return -ENOMEM;
+        }
+
+        cmpnt->name = fmt_single_name(dev, &cmpnt->id);
+        if (!cmpnt->name) {
+                dev_err(dev, "ASoC: Failed to simplifying name\n");
+                return -ENOMEM;
+        }
+
+        cmpnt->dev      = dev;
+        cmpnt->driver   = cmpnt_drv;
+        cmpnt->num_dai  = num_dai;
+
+        ret = snd_soc_register_dais(dev, dai_drv, num_dai);
+        if (ret < 0) {
+                dev_err(dev, "ASoC: Failed to regster DAIs: %d\n", ret);
+                goto error_component_name;
+        }
+
+        mutex_lock(&client_mutex);
+        list_add(&cmpnt->list, &component_list);
+        mutex_unlock(&client_mutex);
+
+        dev_dbg(cmpnt->dev, "ASoC: Registered component '%s'\n", cmpnt->name);
+
+        return ret;
+
+error_component_name:
+        kfree(cmpnt->name);
+
+        return ret;
+}
+
+/**
+ * snd_soc_unregister_component - Unregister a component from the ASoC core
+ *
+ */
+void snd_soc_unregister_component(struct device *dev)
+{
+        struct snd_soc_component *cmpnt;
+
+        list_for_each_entry(cmpnt, &component_list, list) {
+                if (dev == cmpnt->dev)
+                        goto found;
+        }
+        return;
+
+found:
+        snd_soc_unregister_dais(dev, cmpnt->num_dai);
+
+        mutex_lock(&client_mutex);
+        list_del(&cmpnt->list);
+        mutex_unlock(&client_mutex);
+
+        dev_dbg(dev, "ASoC: Unregistered component '%s'\n", cmpnt->name);
+        kfree(cmpnt->name);
+}
+
 /* Retrieve a card's name from device tree */
 int snd_soc_of_parse_card_name(struct snd_soc_card *card,
                                const char *propname)