2131362_en-US

lx2160a kernel 5.10.35 about spi mode

Hi:

I found that the default DSPI_TCF_MODE transmission is very slow. I want to speed up the SPI transmission, but I found that it seems that the DSPI_DMA_MODE transmission is not supported. When I change the mode to DSPI_EOQ_MODE, it will cause the kernel to crash. I would like to know what steps I should take to effectively speed up the transmission of data through SPI.

My changes are as follows:

in spi-fsl-dspi.c

static const struct fsl_dspi_devtype_data ls2085a_data = {

.trans_mode = DSPI_EOQ_MODE,

.max_clock_factor = 8,

};

Re: lx2160a kernel 5.10.35 about spi mode

Please refer to Linux Kernel source code provide by NXP.

https://github.com/nxp-qoriq/linux/blob/lf-5.10.y/drivers/spi/spi-fsl-dspi.c

Only the following two modes are supported.

enum dspi_trans_mode {

DSPI_XSPI_MODE,

DSPI_DMA_MODE,

};

Please use DSPI_XSPI_MODE mode for lx2160a platform.

[LX2160A] = {

.trans_mode = DSPI_XSPI_MODE,

.max_clock_factor = 8,

.fifo_size = 4,