From: Olivier Moysan <olivier.moysan@xxxxxx>
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@xxxxxx>
Signed-off-by: Nuno Sá <nuno.sa@xxxxxxxxxx>
---
sound/soc/stm/stm32_adfsdm.c | 12 +++++++++++-
1 file changed, 11 insertions(+), 1 deletion(-)
diff --git a/sound/soc/stm/stm32_adfsdm.c b/sound/soc/stm/stm32_adfsdm.c
index ec27c13af04f..fb9df3caba12 100644
--- a/sound/soc/stm/stm32_adfsdm.c
+++ b/sound/soc/stm/stm32_adfsdm.c
@@ -295,6 +295,16 @@ 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,
@@ -337,7 +347,7 @@ 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);
--
2.17.1
