i'm writing a driver which should transfer data from my custom ip to memory (via AXI Bus). but if i compile the sources i get the following error: implicit declaration of function 'request_dma'. this function is declared in asm/dma.h which refers to arch/arm/include/asm/dma.h. There is a #ifdef CONFIG_ISA_DMA_API that is not set by the kernel. I tried to set it with menuconfig but it was not possible.
Maybe someone has an advice?