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>
This commit is contained in:
Mark Brown
2011-04-27 18:16:32 +01:00
parent 8842c72afe
commit 848dd8beef
2 changed files with 66 additions and 5 deletions

View File

@ -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);