iio:adc:berlin2-adc: enable interrupts with mutex locked
Move the call to enable channel interrupts into its _read() function to have it protected by a mutex. This ensures that only one channel is sampled at a time. Signed-off-by: Hartmut Knaack <knaack.h@gmx.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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@ -111,6 +111,10 @@ static int berlin2_adc_read(struct iio_dev *indio_dev, int channel)
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mutex_lock(&priv->lock);
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/* Enable the interrupts */
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regmap_write(priv->regmap, BERLIN2_SM_ADC_STATUS,
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BERLIN2_SM_ADC_STATUS_INT_EN(channel));
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/* Configure the ADC */
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regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
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BERLIN2_SM_CTRL_ADC_RESET | BERLIN2_SM_CTRL_ADC_SEL_MASK
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@ -149,6 +153,10 @@ static int berlin2_adc_tsen_read(struct iio_dev *indio_dev)
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mutex_lock(&priv->lock);
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/* Enable interrupts */
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regmap_write(priv->regmap, BERLIN2_SM_TSEN_STATUS,
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BERLIN2_SM_TSEN_STATUS_INT_EN);
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/* Configure the ADC */
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regmap_update_bits(priv->regmap, BERLIN2_SM_CTRL,
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BERLIN2_SM_CTRL_TSEN_RESET | BERLIN2_SM_CTRL_ADC_ROTATE,
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@ -190,7 +198,6 @@ static int berlin2_adc_read_raw(struct iio_dev *indio_dev,
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struct iio_chan_spec const *chan, int *val, int *val2,
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long mask)
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{
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struct berlin2_adc_priv *priv = iio_priv(indio_dev);
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int temp;
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switch (mask) {
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@ -198,10 +205,6 @@ static int berlin2_adc_read_raw(struct iio_dev *indio_dev,
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if (chan->type != IIO_VOLTAGE)
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return -EINVAL;
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/* Enable the interrupts */
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regmap_write(priv->regmap, BERLIN2_SM_ADC_STATUS,
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BERLIN2_SM_ADC_STATUS_INT_EN(chan->channel));
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*val = berlin2_adc_read(indio_dev, chan->channel);
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if (*val < 0)
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return *val;
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@ -211,10 +214,6 @@ static int berlin2_adc_read_raw(struct iio_dev *indio_dev,
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if (chan->type != IIO_TEMP)
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return -EINVAL;
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/* Enable interrupts */
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regmap_write(priv->regmap, BERLIN2_SM_TSEN_STATUS,
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BERLIN2_SM_TSEN_STATUS_INT_EN);
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temp = berlin2_adc_tsen_read(indio_dev);
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if (temp < 0)
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return temp;
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