@@ -966,6 +966,9 @@ static inline bool snd_soc_volsw_is_stereo(struct soc_mixer_control *mc)
int snd_soc_util_init(void);
void snd_soc_util_exit(void);
+int snd_soc_of_parse_card_name(struct snd_soc_card *card,
+ const char *propname);
+
#include <sound/soc-dai.h>
#ifdef CONFIG_DEBUG_FS
@@ -32,6 +32,7 @@
#include <linux/platform_device.h>
#include <linux/ctype.h>
#include <linux/slab.h>
+#include <linux/of.h>
#include <sound/ac97_codec.h>
#include <sound/core.h>
#include <sound/jack.h>
@@ -3367,6 +3368,30 @@ found:
}
EXPORT_SYMBOL_GPL(snd_soc_unregister_codec);
+/* Retrieve a card's name from device tree */
+int snd_soc_of_parse_card_name(struct snd_soc_card *card,
+ const char *propname)
+{
+ struct device_node *np = card->dev->of_node;
+ int ret;
+
+ ret = of_property_read_string_index(np, propname, 0, &card->name);
+ /*
+ * EINVAL means the property does not exist. This is fine providing
+ * card->name was previously set, which is checked later in
+ * snd_soc_register_card.
+ */
+ if (ret < 0 && ret != -EINVAL) {
+ dev_err(card->dev,
+ "Property '%s' could not be read: %d\n",
+ propname, ret);
+ return ret;
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(snd_soc_of_parse_card_name);
+
static int __init snd_soc_init(void)
{
#ifdef CONFIG_DEBUG_FS
Implement snd_soc_of_parse_card_name(), a utility function that sets a card's name from device tree. The machine driver specifies the DT property to use, since this is binding-specific. Signed-off-by: Stephen Warren <swarren@nvidia.com> --- This series is based on my previously posted patch "ASoC: Allow DAI links to be specified using device tree nodes" v4. Patches 1 & 2 at most rely on that for context. Patch 3 relies on it for functionality. v2: New patch implementing new functionality v3: Name this embedded-audio-complex instead of soc-audio-complex. Change property name from user-visible-name to model. Remove compatible property from binding. v4: Convert this to a utility function that cards can call if desired. Modify snd_soc_register_card() not to call this automatically. Allow cards to specify the name of the device tree property that stores that card's name. Don't specify the property as a generic binding; remove embedded-audio-complex.txt include/sound/soc.h | 3 +++ sound/soc/soc-core.c | 25 +++++++++++++++++++++++++ 2 files changed, 28 insertions(+), 0 deletions(-)