FDCAN can not start, no clock found

[Huibean]

after follow the wiki, the can0(m_can2) can not start up on stm32mp157d-dk1

root@stm32mp1:~# dmesg | grep can
[ 0.384348] can: controller area network core
[ 0.384666] can: raw protocol
[ 0.384678] can: broadcast manager protocol
[ 0.384695] can: netlink gateway - max_hops=1
[ 0.663370] m_can_platform 4400f000.can: no clock found

 

root@stm32mp1:~# cat /sys/kernel/debug/clk/clk_summary | grep fdcan
fdcan_k 0 0 0 74250000 0 0 50000 N
fdcan 0 0 0 104438965 0 0 50000 N

[Erwan SZYMANSKI]

Hello @Huibean,
What gives you the following command :
Board $> cat /sys/kernel/debug/clk/clk-summary  ? 

Moreover, can you show us how did you configure your device tree for can node ?(cf: https://wiki.stmicroelectronics.cn/stm32mpu/wiki/FDCAN_device_tree_configuration)

Kind regards,
Erwan.

[Huibean]

I have the clk_summary output like blew, full opuput need to get it tomorrow, the device tree are posted in the file

 

root@stm32mp1:~# cat /sys/kernel/debug/clk/clk_summary | grep fdcan
fdcan_k 0 0 0 74250000 0 0 50000 N
fdcan 0 0 0 104438965 0 0 50000 N

 

by decode the dtb I can get content like below

 

can@4400f000 {
compatible = "bosch,m_can";
reg = <0x4400f000 0x400 0x44011000 0x2800>;
reg-names = "m_can\0message_ram";
interrupts = <0x00 0x14 0x04 0x00 0x16 0x04>;
interrupt-names = "int0\0int1";
clocks = <0x0b 0x00 0x0b 0x9d>;
clock-names = "hclk\0cclk";
bosch,mram-cfg = <0x1400 0x00 0x00 0x20 0x00 0x00 0x02 0x02>;
feature-domains = <0x24 0x3e>;
status = "okay";
pinctrl-names = "default\0sleep";
pinctrl-0 = <0x5f>;
pinctrl-1 = <0x60>;
phandle = <0xd7>;
};

updated:

full clk_summary in file

 

[Erwan SZYMANSKI]

Hello,
This topic has been answered on this link : https://community.st.com/t5/stm32-mpus-products/no-clock-found-for-fdcan-stm32mp157d-dk1/m-p/612096

Kind regards,
Erwan.