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ASoC: stm32: dfsdm: add stm32_adfsdm_dummy_cb() callback

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Adapt STM32 DFSDM driver to a change in iio_channel_get_all_cb() API.
The callback pointer becomes a requested parameter of this API,
so add a dummy callback to be given as parameter of this function.
However, the stm32_dfsdm_get_buff_cb() API is still used instead,
to optimize DMA transfers.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Nuno Sá <nuno.sa@analog.com>
Acked-by: Mark Brown <broonie@kernel.org>
Link: https://lore.kernel.org/r/20201121161457.957-2-nuno.sa@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Olivier Moysan 2020-11-21 17:14:56 +01:00 committed by Jonathan Cameron
parent 29e96f5a6e
commit 9afaf9a5b8
1 changed files with 11 additions and 1 deletions
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12
sound/soc/stm/stm32_adfsdm.c
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@ -293,6 +293,16 @@ static int stm32_adfsdm_pcm_new(struct snd_soc_component *component,
return 0;
}
static int stm32_adfsdm_dummy_cb(const void *data, void *private)
{
/*
* This dummmy callback is requested by iio_channel_get_all_cb() API,
* but the stm32_dfsdm_get_buff_cb() API is used instead, to optimize
* DMA transfers.
*/
return 0;
}
static struct snd_soc_component_driver stm32_adfsdm_soc_platform = {
.open = stm32_adfsdm_pcm_open,
.close = stm32_adfsdm_pcm_close,
@ -335,7 +345,7 @@ static int stm32_adfsdm_probe(struct platform_device *pdev)
if (IS_ERR(priv->iio_ch))
return PTR_ERR(priv->iio_ch);
priv->iio_cb = iio_channel_get_all_cb(&pdev->dev, NULL, NULL);
priv->iio_cb = iio_channel_get_all_cb(&pdev->dev, &stm32_adfsdm_dummy_cb, NULL);
if (IS_ERR(priv->iio_cb))
return PTR_ERR(priv->iio_cb);