netdev - Re: [PATCH net-next 4/9] mlxsw: reg: Add Management UTC Register

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Message-ID: <20190604141724.rwzthxdrcnvjboen@localhost>
Date:   Tue, 4 Jun 2019 07:17:24 -0700
From:   Richard Cochran <richardcochran@...il.com>
To:     Ido Schimmel <idosch@...sch.org>
Cc:     netdev@...r.kernel.org, davem@...emloft.net, jiri@...lanox.com,
        shalomt@...lanox.com, petrm@...lanox.com, mlxsw@...lanox.com,
        Ido Schimmel <idosch@...lanox.com>
Subject: Re: [PATCH net-next 4/9] mlxsw: reg: Add Management UTC Register

On Mon, Jun 03, 2019 at 03:12:39PM +0300, Ido Schimmel wrote:
> From: Shalom Toledo <shalomt@...lanox.com>
> 
> The MTUTC register configures the HW UTC counter.

Why is this called the "UTC" counter?

The PTP time scale is TAI.  Is this counter intended to reflect the
Linux CLOCK_REALTIME system time?

> +/* MTUTC - Management UTC Register
> + * -------------------------------
> + * Configures the HW UTC counter.
> + */
> +#define MLXSW_REG_MTUTC_ID 0x9055
> +#define MLXSW_REG_MTUTC_LEN 0x1C

Thanks,
Richard