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iio: adc: stm32-dfsdm: Factor out core of reading INFO_RAW

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This allows the claim on direct mode to be release in one place
rather than a lot of error paths, simplifying code.

Reviewed-by: Olivier Moysan <olivier.moysan@foss.st.com>
Link: https://patch.msgid.link/20250217141630.897334-8-jic23@kernel.org
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Jonathan Cameron
2025-02-17 14:16:07 +00:00
parent d531b9f789
commit 728341b0ca
1 changed files with 36 additions and 23 deletions
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59
drivers/iio/adc/stm32-dfsdm-adc.c
View File

@@ -1306,6 +1306,38 @@ static int stm32_dfsdm_write_raw(struct iio_dev *indio_dev,
return -EINVAL;
}
static int __stm32_dfsdm_read_info_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan,
int *val)
{
struct stm32_dfsdm_adc *adc = iio_priv(indio_dev);
int ret = 0;
if (adc->hwc)
ret = iio_hw_consumer_enable(adc->hwc);
if (adc->backend)
ret = iio_backend_enable(adc->backend[chan->scan_index]);
if (ret < 0) {
dev_err(&indio_dev->dev,
"%s: IIO enable failed (channel %d)\n",
__func__, chan->channel);
return ret;
}
ret = stm32_dfsdm_single_conv(indio_dev, chan, val);
if (adc->hwc)
iio_hw_consumer_disable(adc->hwc);
if (adc->backend)
iio_backend_disable(adc->backend[chan->scan_index]);
if (ret < 0) {
dev_err(&indio_dev->dev,
"%s: Conversion failed (channel %d)\n",
__func__, chan->channel);
return ret;
}
return 0;
}
static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev,
struct iio_chan_spec const *chan, int *val,
int *val2, long mask)
@@ -1326,30 +1358,11 @@ static int stm32_dfsdm_read_raw(struct iio_dev *indio_dev,
ret = iio_device_claim_direct_mode(indio_dev);
if (ret)
return ret;
if (adc->hwc)
ret = iio_hw_consumer_enable(adc->hwc);
if (adc->backend)
ret = iio_backend_enable(adc->backend[idx]);
if (ret < 0) {
dev_err(&indio_dev->dev,
"%s: IIO enable failed (channel %d)\n",
__func__, chan->channel);
iio_device_release_direct_mode(indio_dev);
return ret;
}
ret = stm32_dfsdm_single_conv(indio_dev, chan, val);
if (adc->hwc)
iio_hw_consumer_disable(adc->hwc);
if (adc->backend)
iio_backend_disable(adc->backend[idx]);
if (ret < 0) {
dev_err(&indio_dev->dev,
"%s: Conversion failed (channel %d)\n",
__func__, chan->channel);
iio_device_release_direct_mode(indio_dev);
return ret;
}
ret = __stm32_dfsdm_read_info_raw(indio_dev, chan, val);
iio_device_release_direct_mode(indio_dev);
if (ret)
return ret;
return IIO_VAL_INT;
case IIO_CHAN_INFO_OVERSAMPLING_RATIO: