Hi could you share the reference implmentation/ configuration for imx8m ECSPI with DMA support.

Venkat21 — Fri, 29 Jan 2021 16:25:48 GMT

Looking for a reference implementation/ configuration support for imx8m ECSPI with DMA support. Also need to access SPI DMA tx rx data from user space.

Re: Hi could you share the reference implmentation/ configuration for imx8m ECSPI with DMA support.

weidong_sun — Mon, 01 Feb 2021 02:55:06 GMT

Hi,

SPI driver (spi-imx.c) already uses sdma transmission, you don't need to consider using sdma in user space.

see drivers/spi/spi-imx.c, please!

......

#define DRIVER_NAME "spi_imx"

static bool use_dma = true;
module_param(use_dma, bool, 0644);
MODULE_PARM_DESC(use_dma, "Enable usage of DMA when available (default)");

......

Have a nice day!

B.R,

Weidong

topic Re: Hi could you share the reference implmentation/ configuration for imx8m ECSPI with DMA support. in i.MX Processors

Hi could you share the reference implmentation/ configuration for imx8m ECSPI with DMA support.

Re: Hi could you share the reference implmentation/ configuration for imx8m ECSPI with DMA support.