For testing STM32, STM32F7, STM32H7 call up_dma_rxcallback on IDLE #183
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stm32:Enable IDEL INT only if DMA in use
stm32f7:Enable IDEL INT only if DMA in use
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Summary
When the RX line returns to idle, run up_dma_rxcallback. This replaces the need to call serial_dma_poll off a timer.
Impact
Testing