[PATCH v2 5/8] iio: adc: stm32-dfsdm: enable hw consumer

Fabrice Gasnier
2019-03-21T16:48:32Z

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>
---
drivers/iio/adc/stm32-dfsdm-adc.c | 14 +++++++++++++-
1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
index 66e2ea0..b491424 100644
--- a/drivers/iio/adc/stm32-dfsdm-adc.c
+++ b/drivers/iio/adc/stm32-dfsdm-adc.c
@@ -630,9 +630,15 @@ static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
/* Reset adc buffer index */
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);
if (ret < 0)
- return ret;
+ goto err_stop_hwc;

ret = stm32_dfsdm_adc_dma_start(indio_dev);
if (ret) {
@@ -652,6 +658,9 @@ static int stm32_dfsdm_postenable(struct iio_dev *indio_dev)
stm32_dfsdm_adc_dma_stop(indio_dev);
stop_dfsdm:
stm32_dfsdm_stop_dfsdm(adc->dfsdm);
+err_stop_hwc:
+ if (adc->hwc)
+ iio_hw_consumer_disable(adc->hwc);

return ret;
}
@@ -667,6 +676,9 @@ static int stm32_dfsdm_predisable(struct iio_dev *indio_dev)

stm32_dfsdm_stop_dfsdm(adc->dfsdm);

+ if (adc->hwc)
+ iio_hw_consumer_disable(adc->hwc);
+
return 0;
}

--
2.7.4