TDA4VH-Q1: changed main mcan port at boot

June Park1

Part Number: TDA4VH-Q1

hello.

The hw port of main mcan changes every time it boots.

./devices/platform/bus@100000/26a1000.can
./devices/platform/bus@100000/26a1000.can/net/can2
./devices/platform/bus@100000/26a1000.can/supplier:phy:phy-can-phy2.19
./devices/platform/bus@100000/supplier:platform:can-phy2
./devices/platform/bus@100000/2900000.pcie/pci0000:00/0000:00:00.0/rescan
./devices/platform/bus@100000/2900000.pcie/pci0000:00/0000:00:00.0/pci_bus/0000:01/rescan
./devices/platform/bus@100000/2900000.pcie/pci0000:00/pci_bus/0000:00/rescan
./devices/platform/bus@100000/supplier:platform:can-phy0
./devices/platform/bus@100000/bus@100000:bus@28380000/supplier:platform:can-phy1
./devices/platform/bus@100000/bus@100000:bus@28380000/40528000.can
./devices/platform/bus@100000/bus@100000:bus@28380000/40528000.can/supplier:phy:phy-can-phy0.17
./devices/platform/bus@100000/bus@100000:bus@28380000/40528000.can/net/can0
./devices/platform/bus@100000/bus@100000:bus@28380000/40568000.can
./devices/platform/bus@100000/bus@100000:bus@28380000/40568000.can/supplier:phy:phy-can-phy1.18
./devices/platform/bus@100000/bus@100000:bus@28380000/40568000.can/net/can1

./devices/platform/bus@100000/26a1000.can
./devices/platform/bus@100000/26a1000.can/net/can0
./devices/platform/bus@100000/26a1000.can/supplier:phy:phy-can-phy2.19
./devices/platform/bus@100000/supplier:platform:can-phy2
./devices/platform/bus@100000/2900000.pcie/pci0000:00/0000:00:00.0/rescan
./devices/platform/bus@100000/2900000.pcie/pci0000:00/0000:00:00.0/pci_bus/0000:01/rescan
./devices/platform/bus@100000/2900000.pcie/pci0000:00/pci_bus/0000:00/rescan
./devices/platform/bus@100000/supplier:platform:can-phy0
./devices/platform/bus@100000/bus@100000:bus@28380000/supplier:platform:can-phy1
./devices/platform/bus@100000/bus@100000:bus@28380000/40528000.can
./devices/platform/bus@100000/bus@100000:bus@28380000/40528000.can/supplier:phy:phy-can-phy0.17
./devices/platform/bus@100000/bus@100000:bus@28380000/40528000.can/net/can1
./devices/platform/bus@100000/bus@100000:bus@28380000/40568000.can
./devices/platform/bus@100000/bus@100000:bus@28380000/40568000.can/supplier:phy:phy-can-phy1.18
./devices/platform/bus@100000/bus@100000:bus@28380000/40568000.can/net/can2

Is there any way to fix the hw port?

over 3 years ago

0 Karan Saxena over 3 years ago

TI__Guru* 78165 points

Can you try using aliases in the device tree?

You can change the aliases in the device tree to hardcode this mapping.

Aliases are present in the below path:

linux-5.10.162+gitAUTOINC+76b3e88d56-g76b3e88d56/arch/arm64/boot/dts/ti/k3-j784s4-common-proc-board.dts

        aliases {                                                               
                serial2 = &main_uart8;                                          
                mmc0 = &main_sdhci0;                                            
                mmc1 = &main_sdhci1;                                            
                can0 = &main_mcan16;                                            
                can1 = &mcu_mcan0;                                              
                can2 = &mcu_mcan1;                                              
                can3 = &main_mcan3;                                             
                can4 = &main_mcan5;                                             
                ethernet1 = &main_cpsw_port1;                                   
        };

Regards

Karan

0 June Park1 over 3 years ago in reply to Karan Saxena

Prodigy 120 points

hello.

I will try it and share it with you.

Thank you karan.

0 June Park1 over 3 years ago in reply to Karan Saxena

Prodigy 120 points

hello.

I tried it. but it still changes.

I did modified k3-j784s4-evm.dts in PSDKLA 8.6

	aliases {
		serial2 = &main_uart8;
		mmc0 = &main_sdhci0;
		mmc1 = &main_sdhci1;
		i2c0 = &main_i2c0;
		can0 = &main_mcan16;
		can1 = &mcu_mcan0;
		can2 = &mcu_mcan1;
	};

0 Karan Saxena over 3 years ago in reply to June Park1

TI__Guru* 78165 points

Let me replicate this at my end and respond back.

Regards

Karan

0 Karan Saxena over 3 years ago in reply to Karan Saxena

TI__Guru* 78165 points

Can you please share your compiled DTB (Not the DTS) where you added the aliases.

Regards

Karan

+1 Karan Saxena over 3 years ago in reply to Karan Saxena

TI__Guru* 78165 points

Please refer to this FAQ I recently wrote to resolve the issue you are facing.

https://e2e.ti.com/support/processors-group/processors/f/processors-forum/1267036/faq-am69-how-can-i-assign-interface-id-to-can-modules

Regards

Karan

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TDA4VH-Q1: changed main mcan port at boot