Re: [PATCH v2] net: stmmac: correct MAC propagation delay

[Johannes Zink]

Hi Richard,

On 7/26/23 20:00, Richard Cochran wrote:
> On Mon, Jul 24, 2023 at 12:01:31PM +0200, Johannes Zink wrote:
>
> > diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
> > index bf619295d079..d1fe4b46f162 100644
> > --- a/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
> > +++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_ptp.h
> > @@ -26,6 +26,12 @@
> >   #define	PTP_ACR		0x40	/* Auxiliary Control Reg */
> >   #define	PTP_ATNR	0x48	/* Auxiliary Timestamp - Nanoseconds Reg */
> >   #define	PTP_ATSR	0x4c	/* Auxiliary Timestamp - Seconds Reg */
> > +#define	PTP_TS_INGR_CORR_NS	0x58	/* Ingress timestamp correction nanoseconds */
> > +#define	PTP_TS_EGR_CORR_NS	0x5C	/* Egress timestamp correction nanoseconds*/
> > +#define	PTP_TS_INGR_CORR_SNS	0x60	/* Ingress timestamp correction subnanoseconds */
> > +#define	PTP_TS_EGR_CORR_SNS	0x64	/* Egress timestamp correction subnanoseconds */
>
> These two...
>
> > +#define	PTP_TS_INGR_LAT	0x68	/* MAC internal Ingress Latency */
> > +#define	PTP_TS_EGR_LAT	0x6c	/* MAC internal Egress Latency */
>
> do not exist on earlier versions of the IP core.
>
> I wonder what values are there?

good catch, I think adding the register definition won't hurt, but if you feel 
more comfortable about it I can add them only for IP core version 5.

Johannes


> Thanks,
> Richard

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