Macro drone_stm32_map_periph_dma::periph_dma2

macro_rules! periph_dma2 {
    periph::map! {
            #[doc = $dma_macro_doc]
            pub macro $dma_macro;

            #[doc = $dma_ty_doc]
            pub struct $dma_ty;

            impl DmaMap for $dma_ty {}

            drone_stm32_map_pieces::reg;
            crate;

            RCC {
                BUSENR {
                    $busenr Shared;
                    DMAEN { $dmaen }
                }
                #[cfg(any(
                    feature = "stm32l4x1",
                    feature = "stm32l4x2",
                    feature = "stm32l4x3",
                    feature = "stm32l4x5",
                    feature = "stm32l4x6",
                    feature = "stm32l4r5",
                    feature = "stm32l4r7",
                    feature = "stm32l4r9",
                    feature = "stm32l4s5",
                    feature = "stm32l4s7",
                    feature = "stm32l4s9"
                ))]
                BUSRSTR {
                    $busrstr Shared;
                    DMARST { $dmarst }
                }
                #[cfg(any(
                    feature = "stm32l4x1",
                    feature = "stm32l4x2",
                    feature = "stm32l4x3",
                    feature = "stm32l4x5",
                    feature = "stm32l4x6",
                    feature = "stm32l4r5",
                    feature = "stm32l4r7",
                    feature = "stm32l4r9",
                    feature = "stm32l4s5",
                    feature = "stm32l4s7",
                    feature = "stm32l4s9"
                ))]
                BUSSMENR {
                    $bussmenr Shared;
                    DMASMEN { $dmasmen }
                }
            }
        } => { ... };
}

Extracts DMA2 head register tokens.