From: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
If CPU/Platform side driver probes successfully, and if it is supporting
both previous normal sound card style and graph style DT, it can call
asoc_simple_card_try_to_probe_graph_card().
It checks graph style DT, and do nothing if it was non graph style DT,
or register new simple-graph-card driver if graph style DT.
Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>
---
include/sound/simple_card_utils.h | 2 ++
sound/soc/generic/simple-card-utils.c | 42 +++++++++++++++++++++++++++++++++++
2 files changed, 44 insertions(+)
diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index c223f79..276e8e4 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -79,4 +79,6 @@ void asoc_simple_card_canonicalize_cpu(struct snd_soc_dai_link *dai_link,
int asoc_simple_card_clean_reference(struct snd_soc_card *card);
+void asoc_simple_card_try_to_probe_graph_card(struct device *dev);
+
#endif /* __SIMPLE_CARD_CORE_H */
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 527944d..fdf7d5e 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -8,6 +8,7 @@
* published by the Free Software Foundation.
*/
#include <linux/clk.h>
+#include <linux/dma-mapping.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_graph.h>
@@ -292,6 +293,47 @@ int asoc_simple_card_clean_reference(struct snd_soc_card *card)
}
EXPORT_SYMBOL_GPL(asoc_simple_card_clean_reference);
+void asoc_simple_card_try_to_probe_graph_card(struct device *dev)
+{
+ struct platform_device_info pdevinfo;
+ struct device_node *node;
+ const char *compatible;
+ int ret;
+
+ node = of_graph_get_top_port(dev);
+ if (!node)
+ /*
+ * It doesn't have graph base sound DT.
+ * Do nothing here, It assumes that system has
+ * normal sound card.
+ */
+ return;
+
+ ret = of_property_read_string(node, "compatible", &compatible);
+ if (ret < 0)
+ goto probe_err;
+
+ /*
+ * FIXME
+ *
+ * It should use of_platform_xxx() instead of
+ * platform_device_register_full() ? but there is no solution.
+ * see also
+ * linux/sound/soc/generic/simple-graph-card.c :: asoc_simple_card_probe
+ */
+
+ memset(&pdevinfo, 0, sizeof(pdevinfo));
+ pdevinfo.parent = dev;
+ pdevinfo.id = PLATFORM_DEVID_AUTO;
+ pdevinfo.name = compatible;
+ pdevinfo.dma_mask = DMA_BIT_MASK(32);
+ platform_device_register_full(&pdevinfo);
+
+probe_err:
+ of_node_put(node);
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_try_to_probe_graph_card);
+
/* Module information */
MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@xxxxxxxxxxx>");
MODULE_DESCRIPTION("ALSA SoC Simple Card Utils");
--
1.9.1
--
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