CAN network doesn't work for micocontroller on STM32MP157C-DK2

[ABous.1]

Hello,

I use STM32MP157C-DK2 with the last open st linux distribution (20-11-12).

I try to enbale CAN network on microcontroller but I can't send message.

I m sure of my code on microcontroller side because it's work fine with an other distribution.

I change dts and dtsi file to enable can pin mapping but without success .

What can I try ?

[Olivier GALLIEN]

Hi @ABous.1​ ,

There's a know limitation regarding M-CAN as listed here :

https://wiki.st.com/stm32mpu/wiki/STM32MP15_OpenSTLinux_release_note#Main_restrictions_list

Please check if it's not the root cause of your issue

Olivier

[ABous.1]

Hello,

Thanks for your answer.

I did the following tests :

-Without sleep mode pin and without the patch

-with sleep mode pin and with the patch

-with sleep mode pin and without the patch

But without success.

I noticed multiple reference to pin A 11 and A12 (my fdcan pins) in stm32mp15-pinctrl.dtsi.

I mean this pins are also use for i2c5.

Should I comment i2C5 or other peripheral ?

[ABous.1]

Hello,

I tried to comment all multiples references to pin A11 and A12 but without result.

Have you an dts file exemple with CAN that I could try on my board ?

PS : (I try to generate DTS with CubeMX but without any effect on my kernel)