spi: use dmaengine_get_dma_device() instead of chan->device->dev

Replace direct dma_chan::device::dev access with the proper
dmaengine_get_dma_device() for consumer API

chan->device->dev is not always the device used for DMA mapping. Some DMA
engines support per-channel IOMMU mappings, so different channels may use
different DMA devices. dmaengine_get_dma_device() returns the correct
device for each channel.

This also prepares for making the DMA engine provider data structures
private. DMA consumers should not access DMA engine internals directly.

Assisted-by: LLM
Signed-off-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260930140257.490019-2-Frank.Li@oss.nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>

0 files changed, 0 insertions, 0 deletions