Using DMA in imx6ul SPI client driver

uuwen — Thu, 13 Jun 2019 10:36:57 GMT

According to this link, it seems that DMA support can be enabled by setting "dma-names" in dts. Also referring to this thread and checking it, the DMA related driver code is also integrated in spi-imx.c.

I am writing a driver for a SPI SRAM device and am using the 23k256 driver (/drivers/mtd/devices/mchp23k256.c) as reference. It seems to me that the IMX SPI controller driver is already handling the DMA mappings and requests, and there is no extra configuration needed other than calling standard SPI API as illustrated in the 23k256 driver?

Re: Using DMA in imx6ul SPI client driver

igorpadykov — Fri, 14 Jun 2019 23:18:28 GMT

Hi Chin

you are right, there is no extra configuration needed other than calling standard SPI APIs.

Best regards
igor
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i.MX ProcessorsのトピックUsing DMA in imx6ul SPI client driver

Using DMA in imx6ul SPI client driver

Re: Using DMA in imx6ul SPI client driver