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SubjectQuestion about DMA

I have 2 questions regarding set_dma_addr(unsigned int channel,
unsigned int addr) helper.

1/ Why does the function take only one address ? I would expect it
to take both a source and a destination address for the dma controller
to transfer data.

2/ The type of address parameter is an unsigned int. Why isn't it a dma_addr_t
type ?

Thanks !

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