[PATCH v2 0/7][resend] ASoC: add OF-graph base simple-card

[PATCH v2 0/7][resend] ASoC: add OF-graph base simple-card

[Kuninori Morimoto]

Hi Mark, Rob

These are v2 of resend of OF-graph base simple-card patch-set.

I added 3 OF-graph helper functions for it.

1) -  3) : new OF-graph helper functions
4) -  7) : OF-graph base simple-card

Kuninori Morimoto (7):
  1) of_graph: add of_graph_get_remote_endpoint()
  2) of_graph: add of_graph_get_port_parent()
  3) of_graph: add of_graph_get_endpoint_count()
  4) ASoC: add snd_soc_get_dai_id()
  5) ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai()
  6) ASoC: add simple-graph-card document
  7) ASoC: add simple-graph-card support

 .../bindings/sound/simple-graph-card.txt           | 137 ++++++++++
 drivers/of/base.c                                  |  60 +++-
 include/linux/of_graph.h                           |  22 ++
 include/sound/simple_card_utils.h                  |  10 +
 include/sound/soc.h                                |   1 +
 sound/soc/generic/Kconfig                          |   7 +
 sound/soc/generic/Makefile                         |   2 +
 sound/soc/generic/simple-card-utils.c              |  36 +++
 sound/soc/generic/simple-graph-card.c              | 303 +++++++++++++++++++++
 sound/soc/soc-core.c                               |  23 ++
 10 files changed, 591 insertions(+), 10 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-card.txt
 create mode 100644 sound/soc/generic/simple-graph-card.c

-- 
1.9.1

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[PATCH v2 1/7] of_graph: add of_graph_get_remote_endpoint()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

It should use same method to get same result.
To getting remote-endpoint node,
let's use of_graph_get_remote_endpoint()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - no change

 drivers/of/base.c        | 18 ++++++++++++++++--
 include/linux/of_graph.h |  8 ++++++++
 2 files changed, 24 insertions(+), 2 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index a641b1f..19cbf1c 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2452,6 +2452,20 @@ struct device_node *of_graph_get_endpoint_by_regs(
 EXPORT_SYMBOL(of_graph_get_endpoint_by_regs);
 
 /**
+ * of_graph_get_remote_endpoint() - get remote endpoint node
+ * @node: pointer to a local endpoint device_node
+ *
+ * Return: Remote endpoint node associated with remote endpoint node linked
+ *	   to @node. Use of_node_put() on it when done.
+ */
+struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
+{
+	/* Get remote endpoint node. */
+	return of_parse_phandle(node, "remote-endpoint", 0);
+}
+EXPORT_SYMBOL(of_graph_get_remote_endpoint);
+
+/**
  * of_graph_get_remote_port_parent() - get remote port's parent node
  * @node: pointer to a local endpoint device_node
  *
@@ -2465,7 +2479,7 @@ struct device_node *of_graph_get_remote_port_parent(
 	unsigned int depth;
 
 	/* Get remote endpoint node. */
-	np = of_parse_phandle(node, "remote-endpoint", 0);
+	np = of_graph_get_remote_endpoint(node);
 
 	/* Walk 3 levels up only if there is 'ports' node. */
 	for (depth = 3; depth && np; depth--) {
@@ -2489,7 +2503,7 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node)
 	struct device_node *np;
 
 	/* Get remote endpoint node. */
-	np = of_parse_phandle(node, "remote-endpoint", 0);
+	np = of_graph_get_remote_endpoint(node);
 	if (!np)
 		return NULL;
 	return of_get_next_parent(np);
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index bb3a5a2..d9d6d9c 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -48,6 +48,8 @@ struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 					struct device_node *previous);
 struct device_node *of_graph_get_endpoint_by_regs(
 		const struct device_node *parent, int port_reg, int reg);
+struct device_node *of_graph_get_remote_endpoint(
+					const struct device_node *node);
 struct device_node *of_graph_get_remote_port_parent(
 					const struct device_node *node);
 struct device_node *of_graph_get_remote_port(const struct device_node *node);
@@ -78,6 +80,12 @@ static inline struct device_node *of_graph_get_endpoint_by_regs(
 	return NULL;
 }
 
+static inline struct device_node *of_graph_get_remote_endpoint(
+					const struct device_node *node)
+{
+	return NULL;
+}
+
 static inline struct device_node *of_graph_get_remote_port_parent(
 					const struct device_node *node)
 {
-- 
1.9.1

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[PATCH v2 2/7] of_graph: add of_graph_get_port_parent()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

Linux kernel already has of_graph_get_remote_port_parent(),
but, sometimes we want to get own port parent.
This patch adds of_graph_get_port_parent()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - no change

 drivers/of/base.c        | 30 ++++++++++++++++++++++--------
 include/linux/of_graph.h |  7 +++++++
 2 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 19cbf1c..6994888 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2466,6 +2466,27 @@ struct device_node *of_graph_get_remote_endpoint(const struct device_node *node)
 EXPORT_SYMBOL(of_graph_get_remote_endpoint);
 
 /**
+ * of_graph_get_port_parent() - get port's parent node
+ * @node: pointer to a local endpoint device_node
+ *
+ * Return: device node associated with endpoint node linked
+ *	   to @node. Use of_node_put() on it when done.
+ */
+struct device_node *of_graph_get_port_parent(struct device_node *node)
+{
+	unsigned int depth;
+
+	/* Walk 3 levels up only if there is 'ports' node. */
+	for (depth = 3; depth && node; depth--) {
+		node = of_get_next_parent(node);
+		if (depth == 2 && of_node_cmp(node->name, "ports"))
+			break;
+	}
+	return node;
+}
+EXPORT_SYMBOL(of_graph_get_port_parent);
+
+/**
  * of_graph_get_remote_port_parent() - get remote port's parent node
  * @node: pointer to a local endpoint device_node
  *
@@ -2476,18 +2497,11 @@ struct device_node *of_graph_get_remote_port_parent(
 			       const struct device_node *node)
 {
 	struct device_node *np;
-	unsigned int depth;
 
 	/* Get remote endpoint node. */
 	np = of_graph_get_remote_endpoint(node);
 
-	/* Walk 3 levels up only if there is 'ports' node. */
-	for (depth = 3; depth && np; depth--) {
-		np = of_get_next_parent(np);
-		if (depth == 2 && of_node_cmp(np->name, "ports"))
-			break;
-	}
-	return np;
+	return of_graph_get_port_parent(np);
 }
 EXPORT_SYMBOL(of_graph_get_remote_port_parent);
 
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index d9d6d9c..80ced0c 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -50,6 +50,7 @@ struct device_node *of_graph_get_endpoint_by_regs(
 		const struct device_node *parent, int port_reg, int reg);
 struct device_node *of_graph_get_remote_endpoint(
 					const struct device_node *node);
+struct device_node *of_graph_get_port_parent(struct device_node *node);
 struct device_node *of_graph_get_remote_port_parent(
 					const struct device_node *node);
 struct device_node *of_graph_get_remote_port(const struct device_node *node);
@@ -86,6 +87,12 @@ static inline struct device_node *of_graph_get_remote_endpoint(
 	return NULL;
 }
 
+static inline struct device_node *of_graph_get_port_parent(
+	struct device_node *node)
+{
+	return NULL;
+}
+
 static inline struct device_node *of_graph_get_remote_port_parent(
 					const struct device_node *node)
 {
-- 
1.9.1

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[PATCH v2 3/7] of_graph: add of_graph_get_endpoint_count()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

OF graph want to count its endpoint number, same as
of_get_child_count(). This patch adds of_graph_get_endpoint_count()

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - fixup non CONFIG_OF define

 drivers/of/base.c        | 12 ++++++++++++
 include/linux/of_graph.h |  6 ++++++
 2 files changed, 18 insertions(+)

diff --git a/drivers/of/base.c b/drivers/of/base.c
index 6994888..e79abb1 100644
--- a/drivers/of/base.c
+++ b/drivers/of/base.c
@@ -2523,3 +2523,15 @@ struct device_node *of_graph_get_remote_port(const struct device_node *node)
 	return of_get_next_parent(np);
 }
 EXPORT_SYMBOL(of_graph_get_remote_port);
+
+int of_graph_get_endpoint_count(const struct device_node *np)
+{
+	struct device_node *endpoint;
+	int num = 0;
+
+	for_each_endpoint_of_node(np, endpoint)
+		num++;
+
+	return num;
+}
+EXPORT_SYMBOL(of_graph_get_endpoint_count);
diff --git a/include/linux/of_graph.h b/include/linux/of_graph.h
index 80ced0c..0296a19 100644
--- a/include/linux/of_graph.h
+++ b/include/linux/of_graph.h
@@ -43,6 +43,7 @@ struct of_endpoint {
 #ifdef CONFIG_OF
 int of_graph_parse_endpoint(const struct device_node *node,
 				struct of_endpoint *endpoint);
+int of_graph_get_endpoint_count(const struct device_node *np);
 struct device_node *of_graph_get_port_by_id(struct device_node *node, u32 id);
 struct device_node *of_graph_get_next_endpoint(const struct device_node *parent,
 					struct device_node *previous);
@@ -62,6 +63,11 @@ static inline int of_graph_parse_endpoint(const struct device_node *node,
 	return -ENOSYS;
 }
 
+static inline int of_graph_get_endpoint_count(const struct device_node *np)
+{
+	return 0;
+}
+
 static inline struct device_node *of_graph_get_port_by_id(
 					struct device_node *node, u32 id)
 {
-- 
1.9.1

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[PATCH v2 4/7] ASoC: add snd_soc_get_dai_id()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

ALSA SoC needs to know connected DAI ID for probing.
On OF-graph case, basically we can check DT port location.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - no change

 include/sound/soc.h  |  1 +
 sound/soc/soc-core.c | 23 +++++++++++++++++++++++
 2 files changed, 24 insertions(+)

diff --git a/include/sound/soc.h b/include/sound/soc.h
index cdfb55f..ab4639e 100644
--- a/include/sound/soc.h
+++ b/include/sound/soc.h
@@ -1664,6 +1664,7 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
 				     const char *prefix,
 				     struct device_node **bitclkmaster,
 				     struct device_node **framemaster);
+int snd_soc_get_dai_id(struct device_node *ep);
 int snd_soc_get_dai_name(struct of_phandle_args *args,
 			 const char **dai_name);
 int snd_soc_of_get_dai_name(struct device_node *of_node,
diff --git a/sound/soc/soc-core.c b/sound/soc/soc-core.c
index a110d39..67901a3 100644
--- a/sound/soc/soc-core.c
+++ b/sound/soc/soc-core.c
@@ -34,6 +34,7 @@
 #include <linux/ctype.h>
 #include <linux/slab.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <linux/dmi.h>
 #include <sound/core.h>
 #include <sound/jack.h>
@@ -4035,6 +4036,28 @@ unsigned int snd_soc_of_parse_daifmt(struct device_node *np,
 }
 EXPORT_SYMBOL_GPL(snd_soc_of_parse_daifmt);
 
+int snd_soc_get_dai_id(struct device_node *ep)
+{
+	struct device_node *node;
+	struct device_node *endpoint;
+	int i, id;
+
+	node = of_graph_get_port_parent(ep);
+
+	i = 0;
+	id = -1;
+	for_each_endpoint_of_node(node, endpoint) {
+		if (endpoint == ep)
+			id = i;
+		i++;
+	}
+	if (id < 0)
+		return -ENODEV;
+
+	return id;
+}
+EXPORT_SYMBOL_GPL(snd_soc_get_dai_id);
+
 int snd_soc_get_dai_name(struct of_phandle_args *args,
 				const char **dai_name)
 {
-- 
1.9.1

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[PATCH v2 5/7] ASoC: simple-card-utils: add asoc_simple_card_parse_graph_dai()

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

simple-card already has asoc_simple_card_parse_dai(),
but graph base parsing needs graph specific version of it.

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - no change

 include/sound/simple_card_utils.h     | 10 ++++++++++
 sound/soc/generic/simple-card-utils.c | 36 +++++++++++++++++++++++++++++++++++
 2 files changed, 46 insertions(+)

diff --git a/include/sound/simple_card_utils.h b/include/sound/simple_card_utils.h
index af58d23..efab584 100644
--- a/include/sound/simple_card_utils.h
+++ b/include/sound/simple_card_utils.h
@@ -60,6 +60,16 @@ int asoc_simple_card_parse_dai(struct device_node *node,
 				  const char *cells_name,
 				  int *is_single_links);
 
+#define asoc_simple_card_parse_graph_cpu(ep, dai_link)			\
+	asoc_simple_card_parse_graph_dai(ep, &dai_link->cpu_of_node,	\
+					 &dai_link->cpu_dai_name)
+#define asoc_simple_card_parse_graph_codec(ep, dai_link)		\
+	asoc_simple_card_parse_graph_dai(ep, &dai_link->codec_of_node,	\
+					 &dai_link->codec_dai_name)
+int asoc_simple_card_parse_graph_dai(struct device_node *ep,
+				     struct device_node **endpoint_np,
+				     const char **dai_name);
+
 int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
 			      struct asoc_simple_dai *simple_dai);
 
diff --git a/sound/soc/generic/simple-card-utils.c b/sound/soc/generic/simple-card-utils.c
index 4924575..eb03030 100644
--- a/sound/soc/generic/simple-card-utils.c
+++ b/sound/soc/generic/simple-card-utils.c
@@ -10,6 +10,7 @@
 #include <linux/clk.h>
 #include <linux/module.h>
 #include <linux/of.h>
+#include <linux/of_graph.h>
 #include <sound/simple_card_utils.h>
 
 int asoc_simple_card_parse_daifmt(struct device *dev,
@@ -164,6 +165,41 @@ int asoc_simple_card_parse_dai(struct device_node *node,
 }
 EXPORT_SYMBOL_GPL(asoc_simple_card_parse_dai);
 
+int asoc_simple_card_parse_graph_dai(struct device_node *ep,
+				     struct device_node **dai_of_node,
+				     const char **dai_name)
+{
+	struct device_node *node;
+	struct of_phandle_args args;
+	int ret;
+
+	if (!ep)
+		return 0;
+	if (!dai_name)
+		return 0;
+
+	/*
+	 * of_graph_get_port_parent() will call
+	 * of_node_put(). So, call of_node_get() here
+	 */
+	of_node_get(ep);
+	node = of_graph_get_port_parent(ep);
+
+	/* Get dai->name */
+	args.np		= node;
+	args.args[0]	= snd_soc_get_dai_id(ep);
+	args.args_count	= (of_graph_get_endpoint_count(node) > 1);
+
+	ret = snd_soc_get_dai_name(&args, dai_name);
+	if (ret < 0)
+		return ret;
+
+	*dai_of_node = node;
+
+	return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_parse_graph_dai);
+
 int asoc_simple_card_init_dai(struct snd_soc_dai *dai,
 			      struct asoc_simple_dai *simple_dai)
 {
-- 
1.9.1

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[PATCH v2 6/7] ASoC: add simple-graph-card document

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - no change

 .../bindings/sound/simple-graph-card.txt           | 137 +++++++++++++++++++++
 1 file changed, 137 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-card.txt

diff --git a/Documentation/devicetree/bindings/sound/simple-graph-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
new file mode 100644
index 0000000..5fa7b74
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
@@ -0,0 +1,137 @@
+Simple-Graph-Card:
+
+Simple-Graph-Card specifies audio DAI connections of SoC <-> codec.
+It is based on common bindings for device graphs.
+see ${LINUX}/Documentation/devicetree/bindings/graph.txt
+
+Basically, Simple-Graph-Card property is same as Simple-Card.
+see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
+
+Below are same as Simple-Card.
+
+- simple-audio-card,name
+- simple-audio-card,format
+- simple-audio-card,frame-master
+- simple-audio-card,bitclock-master
+- simple-audio-card,bitclock-inversion
+- simple-audio-card,frame-inversion
+- simple-audio-card,dai-tdm-slot-num
+- simple-audio-card,dai-tdm-slot-width
+- clocks / system-clock-frequency
+
+These should be implemented
+- simple-audio-card,widgets
+- simple-audio-card,routing
+- simple-audio-card,mclk-fs
+- simple-audio-card,hp-det-gpio
+- simple-audio-card,mic-det-gpio
+
+Required properties:
+
+- compatible				: "asoc-simple-graph-card";
+- dais					: list of CPU DAI port{s}
+
+Example: Single DAI case
+
+	sound_card: sound {
+		compatible = "asoc-simple-graph-card";
+
+		dais = <&cpu_port>;
+	};
+
+	codec {
+		...
+		port {
+			codec_endpoint: endpoint {
+				remote-endpoint = <&cpu_endpoint>;
+			};
+		};
+	};
+
+	cpu {
+		...
+		cpu_port: port@0 {
+			cpu_endpoint: endpoint {
+				remote-endpoint = <&codec_endpoint>;
+
+				simple-audio-card,format = "left_j";
+				simple-audio-card,bitclock-master = <&cpu_endpoint>;
+				simple-audio-card,frame-master = <&cpu_endpoint>;
+				...
+			};
+		};
+	};
+
+Example: Multi DAI case
+
+	sound_card: sound {
+		compatible = "asoc-simple-graph-card";
+
+		dais = <&cpu_port0
+			&cpu_port1
+			&cpu_port2>;
+	};
+
+	codec0 {
+		...
+		port {
+			codec0_endpoint: endpoint {
+				remote-endpoint = <&cpu_endpoint0>;
+			};
+		};
+	};
+
+	codec1 {
+		...
+		port {
+			codec1_endpoint: endpoint {
+				remote-endpoint = <&cpu_endpoint1>;
+			};
+		};
+	};
+
+	codec2 {
+		...
+		port {
+			codec2_endpoint: endpoint {
+				remote-endpoint = <&cpu_endpoint2>;
+			};
+		};
+	};
+
+	cpu {
+		...
+		ports {
+			cpu_port0: port@0 {
+				cpu_endpoint0: endpoint {
+					remote-endpoint = <&codec0_endpoint>;
+
+					simple-audio-card,format = "left_j";
+					simple-audio-card,bitclock-master = <&cpu_endpoint0>;
+					simple-audio-card,frame-master = <&cpu_endpoint0>;
+					...
+				};
+			};
+			cpu_port1: port@1 {
+				cpu_endpoint1: endpoint {
+					remote-endpoint = <&codec1_endpoint>;
+
+					simple-audio-card,format = "i2s";
+					simple-audio-card,bitclock-master = <&cpu_endpoint1>;
+					simple-audio-card,frame-master = <&cpu_endpoint1>;
+					...
+				};
+			};
+			cpu_port2: port@2 {
+				cpu_endpoint2: endpoint {
+					remote-endpoint = <&codec2_endpoint>;
+
+					simple-audio-card,format = "i2s";
+					simple-audio-card,bitclock-master = <&cpu_endpoint2>;
+					simple-audio-card,frame-master = <&cpu_endpoint2>;
+					...
+				};
+			};
+		};
+	};
+
-- 
1.9.1

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Re: [PATCH v2 6/7] ASoC: add simple-graph-card document

[Rob Herring]

On Mon, Feb 13, 2017 at 04:22:54AM +0000, Kuninori Morimoto wrote:
> 
> From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
> 
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
> ---
> v1 -> v2
> 
>  - no change
> 
>  .../bindings/sound/simple-graph-card.txt           | 137 +++++++++++++++++++++

Drop the "simple". Just graph-card is enough.

>  1 file changed, 137 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/sound/simple-graph-card.txt
> 
> diff --git a/Documentation/devicetree/bindings/sound/simple-graph-card.txt b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> new file mode 100644
> index 0000000..5fa7b74
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/sound/simple-graph-card.txt
> @@ -0,0 +1,137 @@
> +Simple-Graph-Card:
> +
> +Simple-Graph-Card specifies audio DAI connections of SoC <-> codec.
> +It is based on common bindings for device graphs.
> +see ${LINUX}/Documentation/devicetree/bindings/graph.txt
> +
> +Basically, Simple-Graph-Card property is same as Simple-Card.
> +see ${LINUX}/Documentation/devicetree/bindings/sound/simple-card.txt
> +
> +Below are same as Simple-Card.
> +
> +- simple-audio-card,name
> +- simple-audio-card,format
> +- simple-audio-card,frame-master
> +- simple-audio-card,bitclock-master
> +- simple-audio-card,bitclock-inversion
> +- simple-audio-card,frame-inversion
> +- simple-audio-card,dai-tdm-slot-num
> +- simple-audio-card,dai-tdm-slot-width
> +- clocks / system-clock-frequency
> +
> +These should be implemented

What do you mean by implemented? These are new? For anything new, I 
think you should drop "simple-audio-card,".

> +- simple-audio-card,widgets
> +- simple-audio-card,routing
> +- simple-audio-card,mclk-fs
> +- simple-audio-card,hp-det-gpio
> +- simple-audio-card,mic-det-gpio

-gpios

> +
> +Required properties:
> +
> +- compatible				: "asoc-simple-graph-card";
> +- dais					: list of CPU DAI port{s}
> +
> +Example: Single DAI case
> +
> +	sound_card: sound {
> +		compatible = "asoc-simple-graph-card";
> +
> +		dais = <&cpu_port>;
> +	};
> +
> +	codec {
> +		...
> +		port {
> +			codec_endpoint: endpoint {
> +				remote-endpoint = <&cpu_endpoint>;
> +			};
> +		};
> +	};
> +
> +	cpu {

cpu is already a standard node name, so you need something different. 
This would be the I2S/SSI controller typically, right? Perhaps 
"dai-controller" for a standard name. 

> +		...
> +		cpu_port: port@0 {
> +			cpu_endpoint: endpoint {
> +				remote-endpoint = <&codec_endpoint>;
> +
> +				simple-audio-card,format = "left_j";
> +				simple-audio-card,bitclock-master = <&cpu_endpoint>;
> +				simple-audio-card,frame-master = <&cpu_endpoint>;

It looks silly to have a phandle to yourself. Perhaps these should be 
boolean. Define new properties if you need to.


> +				...
> +			};
> +		};
> +	};
> +
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Re: [PATCH v2 6/7] ASoC: add simple-graph-card document

[Kuninori Morimoto]

Hi Rob

Thank you for your feedback

> On Mon, Feb 13, 2017 at 04:22:54AM +0000, Kuninori Morimoto wrote:
> > 
> > From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> > 
> > Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> > ---
> > v1 -> v2
> > 
> >  - no change
> > 
> >  .../bindings/sound/simple-graph-card.txt           | 137 +++++++++++++++++++++
> 
> Drop the "simple". Just graph-card is enough.

1 question about this.
If I used "graph-card" for it, it sounds like "generic" driver,
but this is not generic driver.
But using "graph-card" is OK ? no confusion ?

[PATCH v2 7/7] ASoC: add simple-graph-card support

[Kuninori Morimoto]

From: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>

OF-graph base DT binding are used on V4L2, and ALSA SoC is using
different style of DT today. Now ALSA SoC supports simple-card driver
for generic/simple sound card.
In the future, V4L2 / ALSA will support HDMI, and then, DT bindings
between V4L2 / ALSA should be merged.
This patch adds OF-graph base DT binding with simple-card style

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
---
v1 -> v2

 - no change

 sound/soc/generic/Kconfig             |   7 +
 sound/soc/generic/Makefile            |   2 +
 sound/soc/generic/simple-graph-card.c | 303 ++++++++++++++++++++++++++++++++++
 3 files changed, 312 insertions(+)
 create mode 100644 sound/soc/generic/simple-graph-card.c

diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
index d023959..efefabd 100644
--- a/sound/soc/generic/Kconfig
+++ b/sound/soc/generic/Kconfig
@@ -14,3 +14,10 @@ config SND_SIMPLE_SCU_CARD
 	help
 	  This option enables generic simple SCU sound card support.
 	  It supports DPCM of multi CPU single Codec system.
+
+config SND_SIMPLE_GRAPH_CARD
+	tristate "ASoC Simple Graph sound card support"
+	depends on OF
+	select SND_SIMPLE_CARD_UTILS
+	help
+	  This option enables generic simple Graph sound card support
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
index ee750f3..94eb6f1 100644
--- a/sound/soc/generic/Makefile
+++ b/sound/soc/generic/Makefile
@@ -1,7 +1,9 @@
 snd-soc-simple-card-utils-objs	:= simple-card-utils.o
 snd-soc-simple-card-objs	:= simple-card.o
 snd-soc-simple-scu-card-objs	:= simple-scu-card.o
+snd-soc-simple-graph-card-objs	:= simple-graph-card.o
 
 obj-$(CONFIG_SND_SIMPLE_CARD_UTILS)	+= snd-soc-simple-card-utils.o
 obj-$(CONFIG_SND_SIMPLE_CARD)		+= snd-soc-simple-card.o
 obj-$(CONFIG_SND_SIMPLE_SCU_CARD)	+= snd-soc-simple-scu-card.o
+obj-$(CONFIG_SND_SIMPLE_GRAPH_CARD)	+= snd-soc-simple-graph-card.o
diff --git a/sound/soc/generic/simple-graph-card.c b/sound/soc/generic/simple-graph-card.c
new file mode 100644
index 0000000..700717b
--- /dev/null
+++ b/sound/soc/generic/simple-graph-card.c
@@ -0,0 +1,303 @@
+/*
+ * ASoC simple graph sound card support
+ *
+ * Copyright (C) 2016 Renesas Solutions Corp.
+ * Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>
+ *
+ * based on ${LINUX}/sound/soc/generic/simple-card.c
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/clk.h>
+#include <linux/device.h>
+#include <linux/gpio.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_device.h>
+#include <linux/of_gpio.h>
+#include <linux/of_graph.h>
+#include <linux/platform_device.h>
+#include <linux/string.h>
+#include <sound/jack.h>
+#include <sound/simple_card_utils.h>
+
+struct simple_card_data {
+	struct snd_soc_card snd_card;
+	struct simple_dai_props {
+		struct asoc_simple_dai cpu_dai;
+		struct asoc_simple_dai codec_dai;
+	} *dai_props;
+	struct snd_soc_dai_link *dai_link;
+};
+
+#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
+#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
+#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
+
+#define PREFIX	"simple-audio-card,"
+
+static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
+	struct simple_dai_props *dai_props =
+		simple_priv_to_props(priv, rtd->num);
+	int ret;
+
+	ret = clk_prepare_enable(dai_props->cpu_dai.clk);
+	if (ret)
+		return ret;
+
+	ret = clk_prepare_enable(dai_props->codec_dai.clk);
+	if (ret)
+		clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+	return ret;
+}
+
+static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
+	struct simple_dai_props *dai_props =
+		simple_priv_to_props(priv, rtd->num);
+
+	clk_disable_unprepare(dai_props->cpu_dai.clk);
+
+	clk_disable_unprepare(dai_props->codec_dai.clk);
+}
+
+static struct snd_soc_ops asoc_simple_card_ops = {
+	.startup = asoc_simple_card_startup,
+	.shutdown = asoc_simple_card_shutdown,
+};
+
+static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct simple_card_data *priv =	snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_dai *codec = rtd->codec_dai;
+	struct snd_soc_dai *cpu = rtd->cpu_dai;
+	struct simple_dai_props *dai_props =
+		simple_priv_to_props(priv, rtd->num);
+	int ret;
+
+	ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
+	if (ret < 0)
+		return ret;
+
+	ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int asoc_simple_card_dai_link_of(struct device_node *cpu_port,
+					struct simple_card_data *priv,
+					int idx)
+{
+	struct device *dev = simple_priv_to_dev(priv);
+	struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
+	struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
+	struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
+	struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
+	struct device_node *cpu_ep    = of_get_next_child(cpu_port, NULL);
+	struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
+	struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
+	int ret;
+
+	if (rcpu_ep != cpu_ep) {
+		dev_err(dev, "remote-endpoint missmatch (%s/%s/%s)\n",
+			cpu_ep->name, codec_ep->name, rcpu_ep->name);
+		return -EINVAL;
+	}
+
+	ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
+					    PREFIX, &dai_link->dai_fmt);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	/*
+	 * we need to consider "mclk-fs" around here
+	 * see simple-card
+	 */
+
+	ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = snd_soc_of_parse_tdm_slot(cpu_ep,
+					&cpu_dai->tx_slot_mask,
+					&cpu_dai->rx_slot_mask,
+					&cpu_dai->slots,
+					&cpu_dai->slot_width);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = snd_soc_of_parse_tdm_slot(codec_ep,
+					&codec_dai->tx_slot_mask,
+					&codec_dai->rx_slot_mask,
+					&codec_dai->slots,
+					&codec_dai->slot_width);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_canonicalize_dailink(dai_link);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	ret = asoc_simple_card_set_dailink_name(dev, dai_link,
+						"%s-%s",
+						dai_link->cpu_dai_name,
+						dai_link->codec_dai_name);
+	if (ret < 0)
+		goto dai_link_of_err;
+
+	dai_link->ops = &asoc_simple_card_ops;
+	dai_link->init = asoc_simple_card_dai_init;
+
+	dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
+	dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
+	dev_dbg(dev, "\tcpu : %s / %d\n",
+		dai_link->cpu_dai_name,
+		dai_props->cpu_dai.sysclk);
+	dev_dbg(dev, "\tcodec : %s / %d\n",
+		dai_link->codec_dai_name,
+		dai_props->codec_dai.sysclk);
+
+	asoc_simple_card_canonicalize_cpu(dai_link,
+					  priv->snd_card.num_links == 1);
+
+dai_link_of_err:
+	of_node_put(codec_ep);
+
+	return ret;
+}
+
+static int asoc_simple_card_parse_of(struct device *dev,
+				     struct simple_card_data *priv)
+{
+	struct device_node *node = dev->of_node;
+	struct snd_soc_card *card = &priv->snd_card;
+	struct device_node *np;
+	int idx = 0;
+	int ret;
+
+	/*
+	 * we need to consider "widgets", "routing", "mclk-fs" around here
+	 * see simple-card
+	 */
+
+	while ((np = of_parse_phandle(node, "dais", idx))) {
+		ret = asoc_simple_card_dai_link_of(np, priv, idx++);
+		if (ret < 0)
+			return ret;
+	}
+
+	return asoc_simple_card_parse_card_name(card, PREFIX);
+}
+
+static int asoc_simple_get_dais_count(struct device *dev)
+{
+	struct device_node *node = dev->of_node;
+	int count = 0;
+
+	if (of_get_property(node, "dais", NULL)) {
+		while (of_parse_phandle(node, "dais", count))
+			count++;
+	} else {
+		count = 1;
+	}
+
+	return count;
+}
+
+static int asoc_simple_card_probe(struct platform_device *pdev)
+{
+	struct simple_card_data *priv;
+	struct snd_soc_dai_link *dai_link;
+	struct simple_dai_props *dai_props;
+	struct device *dev = &pdev->dev;
+	int num, ret;
+
+	/* Allocate the private data and the DAI link array */
+	priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+	if (!priv)
+		return -ENOMEM;
+
+	num = asoc_simple_get_dais_count(dev);
+
+	dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
+	dai_link  = devm_kzalloc(dev, sizeof(*dai_link)  * num, GFP_KERNEL);
+	if (!dai_props || !dai_link)
+		return -ENOMEM;
+
+	priv->dai_props			= dai_props;
+	priv->dai_link			= dai_link;
+
+	/* Init snd_soc_card */
+	priv->snd_card.owner		= THIS_MODULE;
+	priv->snd_card.dev		= dev;
+	priv->snd_card.dai_link		= dai_link;
+	priv->snd_card.num_links	= num;
+
+	ret = asoc_simple_card_parse_of(dev, priv);
+	if (ret < 0) {
+		if (ret != -EPROBE_DEFER)
+			dev_err(dev, "parse error %d\n", ret);
+		goto err;
+	}
+
+	snd_soc_card_set_drvdata(&priv->snd_card, priv);
+
+	ret = devm_snd_soc_register_card(dev, &priv->snd_card);
+	if (ret >= 0)
+		return ret;
+err:
+	asoc_simple_card_clean_reference(&priv->snd_card);
+
+	return ret;
+}
+
+static int asoc_simple_card_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
+
+	return asoc_simple_card_clean_reference(&priv->snd_card);
+}
+
+static const struct of_device_id asoc_simple_of_match[] = {
+	{ .compatible = "asoc-simple-graph-card", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
+
+static struct platform_driver asoc_simple_card = {
+	.driver = {
+		.name = "asoc-simple-graph-card",
+		.of_match_table = asoc_simple_of_match,
+	},
+	.probe = asoc_simple_card_probe,
+	.remove = asoc_simple_card_remove,
+};
+module_platform_driver(asoc_simple_card);
+
+MODULE_ALIAS("platform:asoc-simple-graph-card");
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("ASoC Simple Graph Sound Card");
+MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx-zM6kxYcvzFBBDgjK7y7TUQ@public.gmane.org>");
-- 
1.9.1

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Re: [PATCH v2 7/7] ASoC: add simple-graph-card support

[Rob Herring]

On Sun, Feb 12, 2017 at 10:23 PM, Kuninori Morimoto <kuninori.morimoto.gx@renesas.com> wrote:
>
> From: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
>
> OF-graph base DT binding are used on V4L2, and ALSA SoC is using
> different style of DT today. Now ALSA SoC supports simple-card driver
> for generic/simple sound card.
> In the future, V4L2 / ALSA will support HDMI, and then, DT bindings
> between V4L2 / ALSA should be merged.
> This patch adds OF-graph base DT binding with simple-card style
>
> Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> ---
> v1 -> v2
>
>  - no change
>
>  sound/soc/generic/Kconfig             |   7 +
>  sound/soc/generic/Makefile            |   2 +
>  sound/soc/generic/simple-graph-card.c | 303 ++++++++++++++++++++++++++++++++++
>  3 files changed, 312 insertions(+)
>  create mode 100644 sound/soc/generic/simple-graph-card.c
>
> diff --git a/sound/soc/generic/Kconfig b/sound/soc/generic/Kconfig
> index d023959..efefabd 100644
> --- a/sound/soc/generic/Kconfig
> +++ b/sound/soc/generic/Kconfig
> @@ -14,3 +14,10 @@ config SND_SIMPLE_SCU_CARD
>         help
>           This option enables generic simple SCU sound card support.
>           It supports DPCM of multi CPU single Codec system.
> +
> +config SND_SIMPLE_GRAPH_CARD
> +       tristate "ASoC Simple Graph sound card support"
> +       depends on OF
> +       select SND_SIMPLE_CARD_UTILS
> +       help
> +         This option enables generic simple Graph sound card support
> diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
> index ee750f3..94eb6f1 100644
> --- a/sound/soc/generic/Makefile
> +++ b/sound/soc/generic/Makefile
> @@ -1,7 +1,9 @@
>  snd-soc-simple-card-utils-objs := simple-card-utils.o
>  snd-soc-simple-card-objs       := simple-card.o
>  snd-soc-simple-scu-card-objs   := simple-scu-card.o
> +snd-soc-simple-graph-card-objs := simple-graph-card.o
>
>  obj-$(CONFIG_SND_SIMPLE_CARD_UTILS)    += snd-soc-simple-card-utils.o
>  obj-$(CONFIG_SND_SIMPLE_CARD)          += snd-soc-simple-card.o
>  obj-$(CONFIG_SND_SIMPLE_SCU_CARD)      += snd-soc-simple-scu-card.o
> +obj-$(CONFIG_SND_SIMPLE_GRAPH_CARD)    += snd-soc-simple-graph-card.o
> diff --git a/sound/soc/generic/simple-graph-card.c b/sound/soc/generic/simple-graph-card.c
> new file mode 100644
> index 0000000..700717b
> --- /dev/null
> +++ b/sound/soc/generic/simple-graph-card.c
> @@ -0,0 +1,303 @@
> +/*
> + * ASoC simple graph sound card support
> + *
> + * Copyright (C) 2016 Renesas Solutions Corp.
> + * Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
> + *
> + * based on ${LINUX}/sound/soc/generic/simple-card.c
> + *
> + * This program is free software; you can redistribute it and/or modify
> + * it under the terms of the GNU General Public License version 2 as
> + * published by the Free Software Foundation.
> + */
> +#include <linux/clk.h>
> +#include <linux/device.h>
> +#include <linux/gpio.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_device.h>
> +#include <linux/of_gpio.h>
> +#include <linux/of_graph.h>
> +#include <linux/platform_device.h>
> +#include <linux/string.h>
> +#include <sound/jack.h>
> +#include <sound/simple_card_utils.h>
> +
> +struct simple_card_data {
> +       struct snd_soc_card snd_card;
> +       struct simple_dai_props {
> +               struct asoc_simple_dai cpu_dai;
> +               struct asoc_simple_dai codec_dai;
> +       } *dai_props;
> +       struct snd_soc_dai_link *dai_link;
> +};
> +
> +#define simple_priv_to_dev(priv) ((priv)->snd_card.dev)
> +#define simple_priv_to_link(priv, i) ((priv)->snd_card.dai_link + (i))
> +#define simple_priv_to_props(priv, i) ((priv)->dai_props + (i))
> +
> +#define PREFIX "simple-audio-card,"
> +
> +static int asoc_simple_card_startup(struct snd_pcm_substream *substream)
> +{
> +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +       struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
> +       struct simple_dai_props *dai_props =
> +               simple_priv_to_props(priv, rtd->num);
> +       int ret;
> +
> +       ret = clk_prepare_enable(dai_props->cpu_dai.clk);
> +       if (ret)
> +               return ret;
> +
> +       ret = clk_prepare_enable(dai_props->codec_dai.clk);
> +       if (ret)
> +               clk_disable_unprepare(dai_props->cpu_dai.clk);
> +
> +       return ret;
> +}
> +
> +static void asoc_simple_card_shutdown(struct snd_pcm_substream *substream)
> +{
> +       struct snd_soc_pcm_runtime *rtd = substream->private_data;
> +       struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
> +       struct simple_dai_props *dai_props =
> +               simple_priv_to_props(priv, rtd->num);
> +
> +       clk_disable_unprepare(dai_props->cpu_dai.clk);
> +
> +       clk_disable_unprepare(dai_props->codec_dai.clk);
> +}
> +
> +static struct snd_soc_ops asoc_simple_card_ops = {
> +       .startup = asoc_simple_card_startup,
> +       .shutdown = asoc_simple_card_shutdown,
> +};
> +
> +static int asoc_simple_card_dai_init(struct snd_soc_pcm_runtime *rtd)
> +{
> +       struct simple_card_data *priv = snd_soc_card_get_drvdata(rtd->card);
> +       struct snd_soc_dai *codec = rtd->codec_dai;
> +       struct snd_soc_dai *cpu = rtd->cpu_dai;
> +       struct simple_dai_props *dai_props =
> +               simple_priv_to_props(priv, rtd->num);
> +       int ret;
> +
> +       ret = asoc_simple_card_init_dai(codec, &dai_props->codec_dai);
> +       if (ret < 0)
> +               return ret;
> +
> +       ret = asoc_simple_card_init_dai(cpu, &dai_props->cpu_dai);
> +       if (ret < 0)
> +               return ret;
> +
> +       return 0;
> +}
> +
> +static int asoc_simple_card_dai_link_of(struct device_node *cpu_port,

I think the sound card node should point to dai's rather than ports.

> +                                       struct simple_card_data *priv,
> +                                       int idx)
> +{
> +       struct device *dev = simple_priv_to_dev(priv);
> +       struct snd_soc_dai_link *dai_link = simple_priv_to_link(priv, idx);
> +       struct simple_dai_props *dai_props = simple_priv_to_props(priv, idx);
> +       struct asoc_simple_dai *cpu_dai = &dai_props->cpu_dai;
> +       struct asoc_simple_dai *codec_dai = &dai_props->codec_dai;
> +       struct device_node *cpu_ep    = of_get_next_child(cpu_port, NULL);
> +       struct device_node *codec_ep = of_graph_get_remote_endpoint(cpu_ep);
> +       struct device_node *rcpu_ep = of_graph_get_remote_endpoint(codec_ep);
> +       int ret;
> +
> +       if (rcpu_ep != cpu_ep) {

You don't need this check. The kernel's job is not DT validation.

> +               dev_err(dev, "remote-endpoint missmatch (%s/%s/%s)\n",
> +                       cpu_ep->name, codec_ep->name, rcpu_ep->name);
> +               return -EINVAL;
> +       }
> +
> +       ret = asoc_simple_card_parse_daifmt(dev, cpu_ep, codec_ep,
> +                                           PREFIX, &dai_link->dai_fmt);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       /*
> +        * we need to consider "mclk-fs" around here
> +        * see simple-card
> +        */
> +
> +       ret = asoc_simple_card_parse_graph_cpu(cpu_ep, dai_link);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = asoc_simple_card_parse_graph_codec(codec_ep, dai_link);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = snd_soc_of_parse_tdm_slot(cpu_ep,
> +                                       &cpu_dai->tx_slot_mask,
> +                                       &cpu_dai->rx_slot_mask,
> +                                       &cpu_dai->slots,
> +                                       &cpu_dai->slot_width);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = snd_soc_of_parse_tdm_slot(codec_ep,
> +                                       &codec_dai->tx_slot_mask,
> +                                       &codec_dai->rx_slot_mask,
> +                                       &codec_dai->slots,
> +                                       &codec_dai->slot_width);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = asoc_simple_card_parse_clk_cpu(dev, cpu_ep, dai_link, cpu_dai);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = asoc_simple_card_parse_clk_codec(dev, codec_ep, dai_link, codec_dai);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = asoc_simple_card_canonicalize_dailink(dai_link);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       ret = asoc_simple_card_set_dailink_name(dev, dai_link,
> +                                               "%s-%s",
> +                                               dai_link->cpu_dai_name,
> +                                               dai_link->codec_dai_name);
> +       if (ret < 0)
> +               goto dai_link_of_err;
> +
> +       dai_link->ops = &asoc_simple_card_ops;
> +       dai_link->init = asoc_simple_card_dai_init;
> +
> +       dev_dbg(dev, "\tname : %s\n", dai_link->stream_name);
> +       dev_dbg(dev, "\tformat : %04x\n", dai_link->dai_fmt);
> +       dev_dbg(dev, "\tcpu : %s / %d\n",
> +               dai_link->cpu_dai_name,
> +               dai_props->cpu_dai.sysclk);
> +       dev_dbg(dev, "\tcodec : %s / %d\n",
> +               dai_link->codec_dai_name,
> +               dai_props->codec_dai.sysclk);
> +
> +       asoc_simple_card_canonicalize_cpu(dai_link,
> +                                         priv->snd_card.num_links == 1);
> +
> +dai_link_of_err:
> +       of_node_put(codec_ep);
> +
> +       return ret;
> +}
> +
> +static int asoc_simple_card_parse_of(struct device *dev,
> +                                    struct simple_card_data *priv)
> +{
> +       struct device_node *node = dev->of_node;
> +       struct snd_soc_card *card = &priv->snd_card;
> +       struct device_node *np;
> +       int idx = 0;
> +       int ret;
> +
> +       /*
> +        * we need to consider "widgets", "routing", "mclk-fs" around here
> +        * see simple-card
> +        */
> +
> +       while ((np = of_parse_phandle(node, "dais", idx))) {
> +               ret = asoc_simple_card_dai_link_of(np, priv, idx++);
> +               if (ret < 0)
> +                       return ret;
> +       }
> +
> +       return asoc_simple_card_parse_card_name(card, PREFIX);
> +}
> +
> +static int asoc_simple_get_dais_count(struct device *dev)
> +{
> +       struct device_node *node = dev->of_node;
> +       int count = 0;
> +
> +       if (of_get_property(node, "dais", NULL)) {
> +               while (of_parse_phandle(node, "dais", count))
> +                       count++;
> +       } else {
> +               count = 1;
> +       }
> +
> +       return count;
> +}
> +
> +static int asoc_simple_card_probe(struct platform_device *pdev)
> +{
> +       struct simple_card_data *priv;
> +       struct snd_soc_dai_link *dai_link;
> +       struct simple_dai_props *dai_props;
> +       struct device *dev = &pdev->dev;
> +       int num, ret;
> +
> +       /* Allocate the private data and the DAI link array */
> +       priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
> +       if (!priv)
> +               return -ENOMEM;
> +
> +       num = asoc_simple_get_dais_count(dev);
> +
> +       dai_props = devm_kzalloc(dev, sizeof(*dai_props) * num, GFP_KERNEL);
> +       dai_link  = devm_kzalloc(dev, sizeof(*dai_link)  * num, GFP_KERNEL);
> +       if (!dai_props || !dai_link)
> +               return -ENOMEM;
> +
> +       priv->dai_props                 = dai_props;
> +       priv->dai_link                  = dai_link;
> +
> +       /* Init snd_soc_card */
> +       priv->snd_card.owner            = THIS_MODULE;
> +       priv->snd_card.dev              = dev;
> +       priv->snd_card.dai_link         = dai_link;
> +       priv->snd_card.num_links        = num;
> +
> +       ret = asoc_simple_card_parse_of(dev, priv);
> +       if (ret < 0) {
> +               if (ret != -EPROBE_DEFER)
> +                       dev_err(dev, "parse error %d\n", ret);
> +               goto err;
> +       }
> +
> +       snd_soc_card_set_drvdata(&priv->snd_card, priv);
> +
> +       ret = devm_snd_soc_register_card(dev, &priv->snd_card);
> +       if (ret >= 0)
> +               return ret;
> +err:
> +       asoc_simple_card_clean_reference(&priv->snd_card);
> +
> +       return ret;
> +}
> +
> +static int asoc_simple_card_remove(struct platform_device *pdev)
> +{
> +       struct snd_soc_card *card = platform_get_drvdata(pdev);
> +       struct simple_card_data *priv = snd_soc_card_get_drvdata(card);
> +
> +       return asoc_simple_card_clean_reference(&priv->snd_card);
> +}
> +
> +static const struct of_device_id asoc_simple_of_match[] = {
> +       { .compatible = "asoc-simple-graph-card", },
> +       {},
> +};
> +MODULE_DEVICE_TABLE(of, asoc_simple_of_match);
> +
> +static struct platform_driver asoc_simple_card = {
> +       .driver = {
> +               .name = "asoc-simple-graph-card",
> +               .of_match_table = asoc_simple_of_match,
> +       },
> +       .probe = asoc_simple_card_probe,
> +       .remove = asoc_simple_card_remove,
> +};
> +module_platform_driver(asoc_simple_card);
> +
> +MODULE_ALIAS("platform:asoc-simple-graph-card");
> +MODULE_LICENSE("GPL v2");
> +MODULE_DESCRIPTION("ASoC Simple Graph Sound Card");
> +MODULE_AUTHOR("Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>");
> --
> 1.9.1
>