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

[Richard Cochran]

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?

Thanks,
Richard