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This commit introduces the PDMA (Peripheral DMA) driver for K230 SoC,
providing essential DMA capabilities for peripheral data transfers.
Key features implemented:
1. PDMA channel request/release management
2. Channel start/stop control
3. Interrupt callback registration
4. Data transfer between device ports and DDR memory
The driver includes:
- Core driver implementation (drv_pdma.c/h)
- Build system support (SConscript)
- Basic test cases (test_pdma.c)
Tested with:
- PDMA channel request/release
- DDR to UART TX FIFO transfers
- UART RX FIFO to DDR transfers
Signed-off-by: eatvector <[email protected]>
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