Fixed can sequence

[qwerqq]

We have changed the scheme and no longer use this pin. I have another question. Now I use spi to transfer all the way to can, but now the device node of can will change every time I start, is there any way to fix the device node? Thank you!

[jimmychan]

Could you tell me which product are you using?

Which version of BSP are you using?

What you mean the "the device node of can will change every time I start"? Could you show me what is it?

[qwerqq]

I am using imx8mp and I am using version 5.4.70。

My demand is three can, there were two on the development board, now I use spi to can method, add a new can, I use the chip is 2515, the driver kernel source code contains 2515 driver, but spi to can chip out of the can node number is not fixed。

Here's an example:

SPI to CAN corresponding software node: can1;

Software node of CAN1: can0;

CAN2 Software node: can2.

But if I start here, it will become the following situation:

SPI to CAN corresponding software node: can2;

Software node of CAN1: can0;

Software node of CAN2: can1.

Therefore, I would like to ask if there is any way to make the node number from spi to can fixed as can2.

My dts configuration is as follows:

[jimmychan]

Do you mean the spi->can number will change every time you boot up?

[qwerqq]

Or do you have a way to convert spi to can? I can try it here.

[qwerqq]

yes。

[jimmychan]

FYI.

https://www.cnblogs.com/uvsjoh/archive/2011/08/08/2130887.html