ASoC: Add simplfied device registration for Atmel SSC devices
Since the SSC is already being registered as a device under arch and
the DMA and SSC hardware are pretty much the same provide a simplified
device registration function for the Atmel SSC which will add the
ASoC-specific devices within the ASoC code, parenting the SSC device
off the actual SSC device. Also use it in the sam9g20-ek driver.
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Acked-by: Liam Girdwood <lrg@slimlogic.co.uk>
diff --git a/sound/soc/atmel/atmel_ssc_dai.c b/sound/soc/atmel/atmel_ssc_dai.c
index eabf66a..5d230ce 100644
--- a/sound/soc/atmel/atmel_ssc_dai.c
+++ b/sound/soc/atmel/atmel_ssc_dai.c
@@ -789,13 +789,14 @@
static __devinit int asoc_ssc_probe(struct platform_device *pdev)
{
- return snd_soc_register_dais(&pdev->dev, atmel_ssc_dai,
- ARRAY_SIZE(atmel_ssc_dai));
+ BUG_ON(pdev->id < 0);
+ BUG_ON(pdev->id >= ARRAY_SIZE(atmel_ssc_dai));
+ return snd_soc_register_dai(&pdev->dev, &atmel_ssc_dai[pdev->id]);
}
static int __devexit asoc_ssc_remove(struct platform_device *pdev)
{
- snd_soc_unregister_dais(&pdev->dev, ARRAY_SIZE(atmel_ssc_dai));
+ snd_soc_unregister_dai(&pdev->dev);
return 0;
}
@@ -809,6 +810,56 @@
.remove = __devexit_p(asoc_ssc_remove),
};
+/**
+ * atmel_ssc_set_audio - Allocate the specified SSC for audio use.
+ */
+int atmel_ssc_set_audio(int ssc_id)
+{
+ struct ssc_device *ssc;
+ static struct platform_device *dma_pdev;
+ struct platform_device *ssc_pdev;
+ int ret;
+
+ if (ssc_id < 0 || ssc_id >= ARRAY_SIZE(atmel_ssc_dai))
+ return -EINVAL;
+
+ /* Allocate a dummy device for DMA if we don't have one already */
+ if (!dma_pdev) {
+ dma_pdev = platform_device_alloc("atmel-pcm-audio", -1);
+ if (!dma_pdev)
+ return -ENOMEM;
+
+ ret = platform_device_add(dma_pdev);
+ if (ret < 0) {
+ platform_device_put(dma_pdev);
+ dma_pdev = NULL;
+ return ret;
+ }
+ }
+
+ ssc_pdev = platform_device_alloc("atmel-ssc-dai", ssc_id);
+ if (!ssc_pdev) {
+ ssc_free(ssc);
+ return -ENOMEM;
+ }
+
+ /* If we can grab the SSC briefly to parent the DAI device off it */
+ ssc = ssc_request(ssc_id);
+ if (IS_ERR(ssc))
+ pr_warn("Unable to parent ASoC SSC DAI on SSC: %ld\n",
+ PTR_ERR(ssc));
+ else
+ ssc_pdev->dev.parent = &(ssc->pdev->dev);
+ ssc_free(ssc);
+
+ ret = platform_device_add(ssc_pdev);
+ if (ret < 0)
+ platform_device_put(ssc_pdev);
+
+ return ret;
+}
+EXPORT_SYMBOL_GPL(atmel_ssc_set_audio);
+
static int __init snd_atmel_ssc_init(void)
{
return platform_driver_register(&asoc_ssc_driver);