dmaengine: mmp_pdma: Add SpacemiT K1 PDMA support with 64-bit addressing

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Add support for SpacemiT K1 PDMA controller which features 64-bit
addressing capabilities.

The SpacemiT K1 PDMA extends the descriptor format with additional
32-bit words for high address bits, enabling access to memory beyond
4GB boundaries. The new spacemit_k1_pdma_ops provides necessary 64-bit
address handling functions and k1 specific controller configurations.

Key changes:
- Add ARCH_SPACEMIT dependency to Kconfig
- Define new high 32-bit address registers (DDADRH, DSADRH, DTADRH)
- Add DCSR_LPAEEN bit for Long Physical Address Extension Enable
- Implement 64-bit operations for SpacemiT K1 PDMA

Signed-off-by: Guodong Xu <guodong@riscstar.com>
Link: https://lore.kernel.org/r/20250822-working_dma_0701_v2-v5-5-f5c0eda734cc@riscstar.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

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Guodong Xu 2025-08-22 11:06:31 +08:00 • committed by Vinod Koul

parent 35e40bf761

commit 5cfe585d86

2 changed files with 82 additions and 1 deletions

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drivers/dma/Kconfig

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81

drivers/dma/mmp_pdma.c

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