STM32_DMA_SNDTR
ndtr = stm32_dma_read(dmadev, STM32_DMA_SNDTR(chan->id));
u32 ndtr = stm32_dma_read(dmadev, STM32_DMA_SNDTR(chan->id));
stm32_dma_write(dmadev, STM32_DMA_SNDTR(chan->id), reg->dma_sndtr);
chan->chan_reg.dma_sndtr = stm32_dma_read(dmadev, STM32_DMA_SNDTR(chan->id));
stm32_dma_write(dmadev, STM32_DMA_SNDTR(chan->id), sg_req->chan_reg.dma_sndtr);
stm32_dma_write(dmadev, STM32_DMA_SNDTR(id), chan_reg.dma_sndtr);