For many audio cards there need to add some off-CODEC widgets, and this
is hard to be supported by dts only, because maybe some widgets need one
or more call backs, such as wevent.
Signed-off-by: Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
---
.../devicetree/bindings/sound/simple-card.txt | 1 +
include/sound/simple_card.h | 14 ++++
sound/soc/generic/Makefile | 3 +-
sound/soc/generic/simple-card-widgets.c | 79 ++++++++++++++++++++++
4 files changed, 96 insertions(+), 1 deletion(-)
create mode 100644 sound/soc/generic/simple-card-widgets.c
diff --git a/Documentation/devicetree/bindings/sound/simple-card.txt b/Documentation/devicetree/bindings/sound/simple-card.txt
index e9e20ec..e626302 100644
--- a/Documentation/devicetree/bindings/sound/simple-card.txt
+++ b/Documentation/devicetree/bindings/sound/simple-card.txt
@@ -15,6 +15,7 @@ Optional properties:
Each entry is a pair of strings, the first being the
connection's sink, the second being the connection's
source.
+- simple-sudio-card,widgets : The name of the audio card off-CODEC widgets.
Required subnodes:
diff --git a/include/sound/simple_card.h b/include/sound/simple_card.h
index 6c74527..75574f8 100644
--- a/include/sound/simple_card.h
+++ b/include/sound/simple_card.h
@@ -12,8 +12,16 @@
#ifndef __SIMPLE_CARD_H
#define __SIMPLE_CARD_H
+#include <linux/of.h>
#include <sound/soc.h>
+struct asoc_simple_card_widgets {
+ const char *name;
+ struct list_head list;
+ const struct snd_soc_dapm_widget *widgets;
+ unsigned int widgets_cnt;
+};
+
struct asoc_simple_dai {
const char *name;
unsigned int fmt;
@@ -35,4 +43,10 @@ struct asoc_simple_card_info {
struct snd_soc_card snd_card;
};
+struct asoc_simple_card_widgets *
+asoc_simple_card_get_widgets(struct device_node *);
+int asoc_simple_card_widgets_register(struct asoc_simple_card_widgets *);
+void
+asoc_simple_card_widgets_unregister(struct asoc_simple_card_widgets *);
+
#endif /* __SIMPLE_CARD_H */
diff --git a/sound/soc/generic/Makefile b/sound/soc/generic/Makefile
index 9c3b246..dbacd12 100644
--- a/sound/soc/generic/Makefile
+++ b/sound/soc/generic/Makefile
@@ -1,3 +1,4 @@
-snd-soc-simple-card-objs := simple-card.o
+snd-soc-simple-card-objs := simple-card-widgets.o
+snd-soc-simple-card-objs += simple-card.o
obj-$(CONFIG_SND_SIMPLE_CARD) += snd-soc-simple-card.o
diff --git a/sound/soc/generic/simple-card-widgets.c b/sound/soc/generic/simple-card-widgets.c
new file mode 100644
index 0000000..6eb0c8c
--- /dev/null
+++ b/sound/soc/generic/simple-card-widgets.c
@@ -0,0 +1,79 @@
+/*
+ * ASoC simple sound card widgets support
+ *
+ * Copyright 2013 Freescale Semiconductor, Inc.
+ * Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>
+ *
+ * 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/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <sound/simple_card.h>
+
+static DEFINE_MUTEX(simple_widgets_mutex);
+static LIST_HEAD(simple_widgets_list);
+
+void
+asoc_simple_card_widgets_unregister(struct asoc_simple_card_widgets *comp)
+{
+ mutex_lock(&simple_widgets_mutex);
+ list_del(&comp->list);
+ mutex_unlock(&simple_widgets_mutex);
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_widgets_unregister);
+
+int
+asoc_simple_card_widgets_register(struct asoc_simple_card_widgets *comp)
+{
+ if (!comp) {
+ pr_err("Simple Card: Failed to register widgets\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&simple_widgets_mutex);
+ list_add(&comp->list, &simple_widgets_list);
+ mutex_unlock(&simple_widgets_mutex);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_widgets_register);
+
+struct asoc_simple_card_widgets *
+asoc_simple_card_get_widgets(struct device_node *np)
+{
+ struct asoc_simple_card_widgets *comp;
+ const char *string;
+ int ret;
+
+ if (!np)
+ return ERR_PTR(-EINVAL);
+
+ if (!of_property_read_bool(np, "simple-audio-card,widgets"))
+ return NULL;
+
+ ret = of_property_read_string(np, "simple-audio-card,widgets",
+ &string);
+ if (ret < 0)
+ return ERR_PTR(ret);
+
+ mutex_lock(&simple_widgets_mutex);
+ list_for_each_entry(comp, &simple_widgets_list, list) {
+ if (!strcmp(string, comp->name)) {
+ mutex_unlock(&simple_widgets_mutex);
+ return comp;
+ }
+
+ }
+ mutex_unlock(&simple_widgets_mutex);
+
+ return ERR_PTR(-EPROBE_DEFER);
+}
+EXPORT_SYMBOL_GPL(asoc_simple_card_get_widgets);
+
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:asoc-simple-card-widgets");
+MODULE_DESCRIPTION("ASoC Simple Sound Card Widgets");
+MODULE_AUTHOR("Xiubo Li <Li.Xiubo@xxxxxxxxxxxxx>");
--
1.8.4
--
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