AM3356: Not able to find the kernel code for the PTP implementation.

Hi Any answer for this? 

HI Man Lung,

I took another look at this, and to summarize, you have already cloned the linuxptp from git.ti.com.

The kernel side ptp code should all be located in this directory

linux-5.10.41+gitAUTOINC+4c2eade9f7-g4c2eade9f7/drivers/ptp

As for the TI specific EMAC implementations, e.g. prueth or other emac, using PTP, that should be located here

linux-5.10.41+gitAUTOINC+4c2eade9f7-g4c2eade9f7/drivers/net/ethernet/ti

What specific code are you looking for?

Thanks,

--Gunter

Gunter:

I think we talked before for other topic. I am from SEL. should we talk thru email? or here? 

Where can I download 5.10.41? 

I have 5.4.106 refer to this https://software-dl.ti.com/processor-sdk-linux/esd/docs/07_03_00_005/devices/AM335X/linux/Release_Specific_Release_Notes.html#kernel

2.1.6.2. Kernel

Linux Kernel

Real Time (RT) Linux Kernel

This is the folder I was looking:
am335x-evm-linux-rt-sdk-src-07.03.00.005.tar\board-support\linux-rt-5.4.106+gitAUTOINC+519667b0d8-g519667b0d8\drivers\net\ethernet\ti

However, I did not see what I want to see. I could not able to see the driver using the timestamping registers. 

such as RX_SYNC_TIMESTAMP_OFFSET_P1, RX_PDELAY_REQ_TIMESTAMP_OFFSET_P1

I am working on the non linux based embedded system implementation for PTP. so I have to implement the driver similar to your linux driver. 

I want to see what did the ti do for each registers. 

I was expecting to see PRUETH driver, PRUPTP driver, CPTS driver etc....

4.3.2.1. Software Components

• PRUETH driver – Kernel driver abstracts PRU hardware/firmware
• PRUPTP driver – Kernel driver abstracts PRU-ICSS based PTP support
• CPTS driver - Kernel driver abstracts CPSW/CPTS based PTP support
• BC driver – Responsible for port state changes, IO Pad configuration
• HSR/PRP driver – Upstream HSR driver, with PRP support and additional bug fixes

http://software-dl.ti.com/processor-sdk-linux/esd/docs/05_02_00_10/linux/Industrial_Protocols_PTP.html

Thanks

Man Lung

Gunter:

I downloaded the kernel from here:

https://www.ti.com/tool/PROCESSOR-SDK-AM335X#downloads

This is only up to version 5.4. 

I saw some ptp implementation here. However, it seems this is not showing me the whole thing. Or this is only software PTP not hardware PTP ?

Please be advised. 

Thanks

Man Lung

HI Gunter. can please you advise if I need to have 5.10? and where could I download? 

Hello Man Lung,

TI will release an AM335x Linux Processor SDK using Linux kernel 5.10 later in 2022. At this point in time, AM335x Linux Processor SDK 7.3 is the latest SDK release (which uses Linux kernel 5.4). Linux PTP was working for the AM335x Linux kernel 4.19 release (SDK 6.3 at www.ti.com/.../06.03.00.106), but I have seen bugs reported when customers try to use AM335x Linux PTP on Linux kernel 5.4. Let me check with the developers to make sure Linux PTP will be validated as working for the Linux kernel 5.10 release.

Regards,

Nick

Hello Man Lung,

Partial update for you. PTP over PRU Ethernet has not yet been validated on the Linux kernel 5.10 release. I am working with the developers to get it tested now. Please ping the thread if I have not posted another update within a couple of business days.

Regards,

Nick

Nick:

Thanks. Please let me know when this is ready. 

Man Lung

Nick. do you have any update for this? Thanks

Hi Nick

Any update now? Thanks