Re: [RFC PATCH net-next 7/9] net: dsa: microchip: ksz9477: add hardware time stamping support

Christian Eggers
2020-11-01T09:36:24Z

Hi Vladimir,

On Friday, 30 October 2020, 19:24:47 CET, Vladimir Oltean wrote:
> On Thu, Oct 22, 2020 at 12:17:48PM +0200, Christian Eggers wrote:
> > I tried to study the effect of setting the ocmode bit on the KSZ either to
> > master or to slave. The main visible change is, that some PTP message
> > types
> > are be filtered out on RX:
> > - in "master" mode, "Sync" messages from other nodes will not be received
> > (but everything else like "Announce" seem to work)
> > - in "slave" mode, "Delay_Req" messages from other nodes will not be
> > received
> Could you dump the contents of your REG_PTP_MSG_CONF2 register?
runtime register value is 0x1004 (matches default value from the data sheet).
The Linux driver doesn't touch this register. Below is a dump of all PTP
related (global) registers.

regards
Christian

KSZ9563 (Ethernet switch)

Global

IEEE 1588 PTP
CLKCTRL 0002 SWFA enabled CLKSADJ NOP PTPSD subtract
CLKREAD NOP CLKWRITE NOP CLKCADJ disabled
EN enabled RESET normal
RTCCP 0002 PHASE 16ns
RTCNS 17D72FF0 NANOSECONDS 399978480
RTCS 00000023 SECONDS 35
RTCSUBNS 00000000 RATEDIR subtract TEMPADJ permanent
SUBNS 0
RTCTMPADJ 00000000 CYCLES 0
MSGCFG1 007D MODEEN enabled IEEE802.3 enabled UDPv4 enabled
UDPv6 enabled TCMODE P2P OCMODE slave
MSGCFG2 1004 UNICASTEN both ALTMASTER disabled PRIOTX event only
CHKSYNFU disabled CHKDLY disabled CHKPDLY disabled
DROP disabled CHKDOM disabled IPv4CHKSUM calc
DOMVER 0200 VERSION 2 DOMAIN 0
UNITIDX 00000000 GPIO_IDX GPIO_1 TS_IDX Unit 0 TRIG_IDX Unit 0