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On new Spreadtrum platforms, when the CPU enters idle, it will close the DMA controllers' clock to save power if the DMA controller is not busy. Moreover the DMA controller's busy signal depends on the DMA enable flag and the request pending flag. When DMA controller starts to transfer data, which means we already set the DMA enable flag, but now we should also set the request pending flag, in case the DMA clock will be closed accidentally if the CPU can not detect the DMA controller's busy signal. Signed-off-by: Zhenfang Wang <zhenfang.wang@unisoc.com> Signed-off-by: Baolin Wang <baolin.wang7@gmail.com> Link: https://lore.kernel.org/r/02adbe4364ec436ec2c5bc8fd2386bab98edd884.1584019223.git.baolin.wang7@gmail.com Signed-off-by: Vinod Koul <vkoul@kernel.org>
1310 lines
35 KiB
1310 lines
35 KiB