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iio: adc: stm32-dfsdm: enable hw consumer 

Optionally enable IIO hw consumer, when provided (e.g. for DFSDM_IIO type).
This is precursor patch to introduce buffer modes.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Fabrice Gasnier 2019-03-21 17:47:26 +01:00 committed by Jonathan Cameron
parent 7464850873
commit 9491f75fe2
1 changed files with 13 additions and 1 deletions
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14
drivers/iio/adc/stm32-dfsdm-adc.c
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@ -630,9 +630,15 @@ static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
/* Reset adc buffer index */ /* Reset adc buffer index */
adc->bufi = 0; adc->bufi = 0;
if (adc->hwc) {
ret = iio_hw_consumer_enable(adc->hwc);
if (ret < 0)
return ret;
}
ret = stm32_dfsdm_start_dfsdm(adc->dfsdm); ret = stm32_dfsdm_start_dfsdm(adc->dfsdm);
if (ret < 0) if (ret < 0)
return ret; goto err_stop_hwc;
ret = stm32_dfsdm_adc_dma_start(indio_dev); ret = stm32_dfsdm_adc_dma_start(indio_dev);
if (ret) { if (ret) {
@ -652,6 +658,9 @@ err_stop_dma:
stm32_dfsdm_adc_dma_stop(indio_dev); stm32_dfsdm_adc_dma_stop(indio_dev);
stop_dfsdm: stop_dfsdm:
stm32_dfsdm_stop_dfsdm(adc->dfsdm); stm32_dfsdm_stop_dfsdm(adc->dfsdm);
err_stop_hwc:
if (adc->hwc)
iio_hw_consumer_disable(adc->hwc);
return ret; return ret;
} }
@ -667,6 +676,9 @@ static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)
stm32_dfsdm_stop_dfsdm(adc->dfsdm); stm32_dfsdm_stop_dfsdm(adc->dfsdm);
if (adc->hwc)
iio_hw_consumer_disable(adc->hwc);
return 0; return 0;
} }