Hi all, I just wanted to put a quick note out for anyone who wants to use LinuxPTP on a Raspberry Pi 3B+ and can't get it to work.
I found an old message from this list by Naoki Itokawa about making LinuxPTP work on a Pi 3, but this doesn't work on a 3B+ as it uses a new Ethernet driver, lan78xx. Naoki's post is in the archive here: https://sourceforge.net/p/linuxptp/mailman/message/35565972/ I have confirmed that the same technique used by Naoki works with the new driver (drivers/net/usb/lan78xx.c), so add ".get_ts_info = ethtool_op_get_ts_info," to the end of the lan78xx_ethtool_ops structure making it look like this: static const struct ethtool_ops lan78xx_ethtool_ops = { .get_link = lan78xx_get_link, .nway_reset = phy_ethtool_nway_reset, .get_drvinfo = lan78xx_get_drvinfo, .get_msglevel = lan78xx_get_msglevel, .set_msglevel = lan78xx_set_msglevel, .get_eeprom_len = lan78xx_ethtool_get_eeprom_len, .get_eeprom = lan78xx_ethtool_get_eeprom, .set_eeprom = lan78xx_ethtool_set_eeprom, .get_ethtool_stats = lan78xx_get_stats, .get_sset_count = lan78xx_get_sset_count, .get_strings = lan78xx_get_strings, .get_wol = lan78xx_get_wol, .set_wol = lan78xx_set_wol, .get_eee = lan78xx_get_eee, .set_eee = lan78xx_set_eee, .get_pauseparam = lan78xx_get_pause, .set_pauseparam = lan78xx_set_pause, .get_link_ksettings = lan78xx_get_link_ksettings, .set_link_ksettings = lan78xx_set_link_ksettings, .get_regs_len = lan78xx_get_regs_len, .get_regs = lan78xx_get_regs, .get_ts_info = ethtool_op_get_ts_info, }; And recompiling will allow LinuxPTP to start in software mode. Obviously don't expect blinding performance with the Raspberry Pi 3B+ - realistically synchronizing to within micro seconds is the best achievable. Thanks to all, Gethyn Longworth, MEng CEng MIET The data contained in, or attached to, this e-mail, may contain confidential information. If you have received it in error you should notify the sender immediately by reply e-mail, delete the message from your system and contact +44 (0) 3301235850 (Security Operations Centre) if you need assistance. Please do not copy it for any purpose, or disclose its contents to any other person. An e-mail response to this address may be subject to interception or monitoring for operational reasons or for lawful business practices. (c) 2019 Rolls-Royce plc Registered office: 62 Buckingham Gate, London SW1E 6AT Company number: 1003142. Registered in England.
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