STM32_DMAMUX_MAX_DMA_REQUESTS
STM32_DMAMUX_MAX_DMA_REQUESTS);
STM32_DMAMUX_MAX_DMA_REQUESTS;
if (dma_req > STM32_DMAMUX_MAX_DMA_REQUESTS) {
DECLARE_BITMAP(dma_inuse, STM32_DMAMUX_MAX_DMA_REQUESTS); /* Used DMA channel */
u32 ccr[STM32_DMAMUX_MAX_DMA_REQUESTS]; /* Used to backup CCR register