From 9afaf9a5b80e6f4fd29a9d04476f2f1a0a8fd995 Mon Sep 17 00:00:00 2001 From: Olivier Moysan Date: Sat, 21 Nov 2020 17:14:56 +0100 Subject: ASoC: stm32: dfsdm: add stm32_adfsdm_dummy_cb() callback MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 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 Signed-off-by: Nuno Sá Acked-by: Mark Brown Link: https://lore.kernel.org/r/20201121161457.957-2-nuno.sa@analog.com Signed-off-by: Jonathan Cameron --- sound/soc/stm/stm32_adfsdm.c | 12 +++++++++++- 1 file changed, 11 insertions(+), 1 deletion(-) (limited to 'sound/soc') 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); -- cgit v1.2.3