iio: adc: stm32-adc: Add check on overrun interrupt

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Enable overrun interrupt on STM32 ADC. In case data register hasn't been
read (by CPU or DMA), overrun condition is detected when there's new
conversion data available. Stop grabbing data and log an error message.
Use a threaded irq to avoid printing the error message from hard irq
context.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Fabrice Gasnier 2019-12-02 10:02:19 +01:00 • committed by Jonathan Cameron

parent 4cf01d6d4e

commit cc06e67d8f

3 changed files with 69 additions and 9 deletions

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14

drivers/iio/adc/stm32-adc-core.c

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9

drivers/iio/adc/stm32-adc-core.h

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55

drivers/iio/adc/stm32-adc.c

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