diff options
author | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-08-18 15:29:37 (GMT) |
---|---|---|
committer | Mark Brown <broonie@opensource.wolfsonmicro.com> | 2010-08-18 15:53:22 (GMT) |
commit | abfa4eae0bd2723859931631771ac275f97cada4 (patch) | |
tree | e6bb08ccc9e15b18bead4dae83fe139eb409be1a /sound/soc/atmel/atmel_ssc_dai.c | |
parent | dad965f07be946726c6153cf578d089ea991f41e (diff) | |
download | linux-abfa4eae0bd2723859931631771ac275f97cada4.tar.xz |
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>
Diffstat (limited to 'sound/soc/atmel/atmel_ssc_dai.c')
-rw-r--r-- | sound/soc/atmel/atmel_ssc_dai.c | 57 |
1 files changed, 54 insertions, 3 deletions
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 struct snd_soc_dai_driver atmel_ssc_dai[NUM_SSC_DEVICES] = { 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 @@ static struct platform_driver asoc_ssc_driver = { .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); |