en Copyright 2015 Java http://172.16.0.5:8080/history/linux-6.15/drivers/dma/sf-pdma/Makefile#6973886a dmaengine: sf-pdma: add platform DMA support for HiFive Unleashed A00Add PDMA driver, sf-pdma, to enable DMA engine on HiFive UnleashedRev A00 board. - Implement dmaengine APIs, support MEM_TO_MEM async copy. - Tested by DMA Test client - Supports 4 channels DMA, each channel has 1 done and 1 err interrupt connected to platform-level interrupt controller (PLIC). - Depends on DMA_ENGINE and DMA_VIRTUAL_CHANNELSThe datasheet is here: https://static.dev.sifive.com/FU540-C000-v1.0.pdfFollow the DMAengine controller doc,"./Documentation/driver-api/dmaengine/provider.rst" to implement DMAengine. And use the dma test client in doc,"./Documentation/driver-api/dmaengine/dmatest.rst", to test.Each DMA channel has separate HW regs and support done and error ISRs.4 channels share 1 done and 1 err ISRs. There's no expander/arbitratorin DMA HW. ------ ------ | |--< done 23 >--|ch 0| | |--< err 24 >--| | (dma0chan0) | | ------ | | ------ | |--< done 25 >--|ch 1| | |--< err 26 >--| | (dma0chan1) |PLIC| ------ | | ------ | |--< done 27 >--|ch 2| | |--< err 28 >--| | (dma0chan2) | | ------ | | ------ | |--< done 29 >--|ch 3| | |--< err 30 >--| | (dma0chan3) ------ ------Signed-off-by: Green Wan <green.wan@sifive.com>Link: https://lore.kernel.org/r/20191107084955.7580-4-green.wan@sifive.comSigned-off-by: Vinod Koul <vkoul@kernel.org> List of files: /linux-6.15/drivers/dma/sf-pdma/Makefile Thu, 07 Nov 2019 08:49:21 +0000 Green Wan <green.wan@sifive.com>