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dmaengine: dw-axi-dmac: Support of_dma_controller_register()

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Add support for of_dma_controller_register() so that DMA clients
can pass in device handshake number to the AxiDMA driver.

DMA clients shall code the device handshake number in the Device tree.
When DMA activities are needed, DMA clients shall invoke OF helper
function to pass in the device handshake number to the AxiDMA.

Without register to the of_dma_controller_register(), data transfer
between memory to device and device to memory operations would failed.

Signed-off-by: Sia Jee Heng <jee.heng.sia@intel.com>
Tested-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Link: https://lore.kernel.org/r/20210125013255.25799-9-jee.heng.sia@intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
This commit is contained in:
Sia Jee Heng
2021-01-25 09:32:46 +08:00
committed by Vinod Koul
parent 1deb96c0fa
commit b428c6fa41
2 changed files with 27 additions and 0 deletions
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drivers/dma/dw-axi-dmac/dw-axi-dmac.h
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@@ -37,6 +37,7 @@ struct axi_dma_chan {
struct axi_dma_chip *chip;
void __iomem *chan_regs;
u8 id;
u8 hw_handshake_num;
atomic_t descs_allocated;
struct dma_pool *desc_pool;