From: Shalom Toledo <shalomt@mellanox.com>
To: Richard Cochran <richardcochran@gmail.com>,
Ido Schimmel <idosch@idosch.org>
Cc: "netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"davem@davemloft.net" <davem@davemloft.net>,
Jiri Pirko <jiri@mellanox.com>, Petr Machata <petrm@mellanox.com>,
mlxsw <mlxsw@mellanox.com>, Ido Schimmel <idosch@mellanox.com>
Subject: Re: [PATCH net-next 4/9] mlxsw: reg: Add Management UTC Register
Date: Wed, 5 Jun 2019 11:30:06 +0000 [thread overview]
Message-ID: <05498adb-364e-18c9-f1d1-bb32462e4036@mellanox.com> (raw)
In-Reply-To: <20190604141724.rwzthxdrcnvjboen@localhost>
On 04/06/2019 17:17, Richard Cochran wrote:
> On Mon, Jun 03, 2019 at 03:12:39PM +0300, Ido Schimmel wrote:
>> From: Shalom Toledo <shalomt@mellanox.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?
Exactly. The hardware doesn't have the ability to convert the FRC to UTC, so
we, as a driver, need to do it and align the hardware with this value.
>
>> +/* MTUTC - Management UTC Register
>> + * -------------------------------
>> + * Configures the HW UTC counter.
>> + */
>> +#define MLXSW_REG_MTUTC_ID 0x9055
>> +#define MLXSW_REG_MTUTC_LEN 0x1C
>
> Thanks,
> Richard
>
next prev parent reply other threads:[~2019-06-05 11:30 UTC|newest]
Thread overview: 37+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-03 12:12 [PATCH net-next 0/9] mlxsw: Add support for physical hardware clock Ido Schimmel
2019-06-03 12:12 ` [PATCH net-next 1/9] mlxsw: cmd: Free running clock PCI BAR and offsets via query firmware Ido Schimmel
2019-06-03 12:12 ` [PATCH net-next 2/9] mlxsw: core: Add a new interface for reading the hardware free running clock Ido Schimmel
2019-06-03 12:12 ` [PATCH net-next 3/9] mlxsw: pci: Query free running clock PCI BAR and offsets Ido Schimmel
2019-06-03 12:12 ` [PATCH net-next 4/9] mlxsw: reg: Add Management UTC Register Ido Schimmel
2019-06-04 14:17 ` Richard Cochran
2019-06-05 11:30 ` Shalom Toledo [this message]
2019-06-05 17:23 ` Richard Cochran
2019-06-05 18:55 ` Shalom Toledo
2019-06-06 2:37 ` Richard Cochran
2019-06-06 9:11 ` Shalom Toledo
2019-06-06 10:12 ` Petr Machata
2019-06-03 12:12 ` [PATCH net-next 5/9] mlxsw: reg: Add Management Pulse Per Second Register Ido Schimmel
2019-06-03 12:12 ` [PATCH net-next 6/9] ptp: ptp_clock: Publish scaled_ppm_to_ppb Ido Schimmel
2019-06-04 14:21 ` Richard Cochran
2019-06-05 11:46 ` Shalom Toledo
2019-06-03 12:12 ` [PATCH net-next 7/9] mlxsw: spectrum_ptp: Add implementation for physical hardware clock operations Ido Schimmel
2019-06-04 14:28 ` Richard Cochran
2019-06-05 6:30 ` Jiri Pirko
2019-06-05 17:24 ` Richard Cochran
2019-06-05 11:44 ` Shalom Toledo
2019-06-05 17:40 ` Richard Cochran
2019-06-05 19:28 ` Shalom Toledo
2019-06-06 2:43 ` Richard Cochran
2019-06-06 8:50 ` Shalom Toledo
2019-06-06 8:57 ` Shalom Toledo
2019-06-04 17:03 ` Richard Cochran
2019-06-05 9:00 ` Petr Machata
2019-06-05 17:31 ` Richard Cochran
2019-06-06 10:21 ` Petr Machata
2019-06-03 12:12 ` [PATCH net-next 8/9] mlxsw: spectrum: PTP physical hardware clock initialization Ido Schimmel
2019-06-03 12:12 ` [PATCH net-next 9/9] selftests: ptp: Add Physical Hardware Clock test Ido Schimmel
2019-06-04 17:05 ` Richard Cochran
2019-06-07 11:15 ` Vladimir Oltean
2019-06-08 10:44 ` Vladimir Oltean
2019-06-11 13:54 ` Shalom Toledo
2019-06-03 17:35 ` [PATCH net-next 0/9] mlxsw: Add support for physical hardware clock David Miller
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