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authorMark Brown <broonie@opensource.wolfsonmicro.com>2011-04-27 21:16:32 +0400
committerMark Brown <broonie@opensource.wolfsonmicro.com>2011-04-28 01:33:11 +0400
commit848dd8beef44df18f2eb61e00981b0692adb801b (patch)
treec860d13902c98fab86390e7b29027c063ffc3af5 /sound/soc/soc-utils.c
parent8842c72afe9f954d9462da577a25d4a32bfe0a2b (diff)
downloadlinux-848dd8beef44df18f2eb61e00981b0692adb801b.tar.xz
ASoC: Add more natural support for no-DMA DAIs
Since we can now support multiple platforms allow machines to not specify a platform in a DAI link. Since the rest of the code requires that we have a struct device for all objects we do this by substituting in a dummy device that we register automatically. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com> Acked-by: Jassi Brar <jassisinghbrar@gmail.com> Acked-by: Liam Girdwood <lrg@ti.com>
Diffstat (limited to 'sound/soc/soc-utils.c')
-rw-r--r--sound/soc/soc-utils.c55
1 files changed, 55 insertions, 0 deletions
diff --git a/sound/soc/soc-utils.c b/sound/soc/soc-utils.c
index 3f45e6a439bf..286579140882 100644
--- a/sound/soc/soc-utils.c
+++ b/sound/soc/soc-utils.c
@@ -13,6 +13,7 @@
* option) any later version.
*/
+#include <linux/platform_device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
@@ -55,3 +56,57 @@ int snd_soc_params_to_bclk(struct snd_pcm_hw_params *params)
return ret;
}
EXPORT_SYMBOL_GPL(snd_soc_params_to_bclk);
+
+static struct snd_soc_platform_driver dummy_platform;
+
+static __devinit int snd_soc_dummy_probe(struct platform_device *pdev)
+{
+ return snd_soc_register_platform(&pdev->dev, &dummy_platform);
+}
+
+static __devexit int snd_soc_dummy_remove(struct platform_device *pdev)
+{
+ snd_soc_unregister_platform(&pdev->dev);
+
+ return 0;
+}
+
+static struct platform_driver soc_dummy_driver = {
+ .driver = {
+ .name = "snd-soc-dummy",
+ .owner = THIS_MODULE,
+ },
+ .probe = snd_soc_dummy_probe,
+ .remove = __devexit_p(snd_soc_dummy_remove),
+};
+
+static struct platform_device *soc_dummy_dev;
+
+static int __init snd_soc_util_init(void)
+{
+ int ret;
+
+ soc_dummy_dev = platform_device_alloc("snd-soc-dummy", -1);
+ if (!soc_dummy_dev)
+ return -ENOMEM;
+
+ ret = platform_device_add(soc_dummy_dev);
+ if (ret != 0) {
+ platform_device_put(soc_dummy_dev);
+ return ret;
+ }
+
+ ret = platform_driver_register(&soc_dummy_driver);
+ if (ret != 0)
+ platform_device_unregister(soc_dummy_dev);
+
+ return ret;
+}
+module_init(snd_soc_util_init);
+
+static void __exit snd_soc_util_exit(void)
+{
+ platform_device_unregister(soc_dummy_dev);
+ platform_driver_unregister(&soc_dummy_driver);
+}
+module_exit(snd_soc_util_exit);