diff options
| author | Olivier Moysan <olivier.moysan@st.com> | 2020-11-21 19:14:56 +0300 |
|---|---|---|
| committer | Jonathan Cameron <Jonathan.Cameron@huawei.com> | 2020-12-03 22:32:40 +0300 |
| commit | 9afaf9a5b80e6f4fd29a9d04476f2f1a0a8fd995 (patch) | |
| tree | 83e28df607f2d199596d88fd85ba8638051376e2 /sound/soc/stm/stm32_adfsdm.c | |
| parent | 29e96f5a6e8178277a05c80e58ad056c5e68b934 (diff) | |
| download | linux-9afaf9a5b80e6f4fd29a9d04476f2f1a0a8fd995.tar.xz | |
ASoC: stm32: dfsdm: add stm32_adfsdm_dummy_cb() callback
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>
Diffstat (limited to 'sound/soc/stm/stm32_adfsdm.c')
| -rw-r--r-- | sound/soc/stm/stm32_adfsdm.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sound/soc/stm/stm32_adfsdm.c b/sound/soc/stm/stm32_adfsdm.c index c4031988f981..47fae8dd20b4 100644 --- a/sound/soc/stm/stm32_adfsdm.c +++ b/sound/soc/stm/stm32_adfsdm.c @@ -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); |