From: Andrew Lunn <andrew@lunn.ch>
To: Wei Fang <wei.fang@nxp.com>
Cc: "robh@kernel.org" <robh@kernel.org>,
"krzk+dt@kernel.org" <krzk+dt@kernel.org>,
"conor+dt@kernel.org" <conor+dt@kernel.org>,
"richardcochran@gmail.com" <richardcochran@gmail.com>,
Claudiu Manoil <claudiu.manoil@nxp.com>,
Vladimir Oltean <vladimir.oltean@nxp.com>,
Clark Wang <xiaoning.wang@nxp.com>,
"andrew+netdev@lunn.ch" <andrew+netdev@lunn.ch>,
"davem@davemloft.net" <davem@davemloft.net>,
"edumazet@google.com" <edumazet@google.com>,
"kuba@kernel.org" <kuba@kernel.org>,
"pabeni@redhat.com" <pabeni@redhat.com>,
"vadim.fedorenko@linux.dev" <vadim.fedorenko@linux.dev>,
Frank Li <frank.li@nxp.com>,
"shawnguo@kernel.org" <shawnguo@kernel.org>,
"s.hauer@pengutronix.de" <s.hauer@pengutronix.de>,
"festevam@gmail.com" <festevam@gmail.com>,
"F.S. Peng" <fushi.peng@nxp.com>,
"devicetree@vger.kernel.org" <devicetree@vger.kernel.org>,
"netdev@vger.kernel.org" <netdev@vger.kernel.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
"imx@lists.linux.dev" <imx@lists.linux.dev>,
"kernel@pengutronix.de" <kernel@pengutronix.de>
Subject: Re: [PATCH v5 net-next 08/15] ptp: netc: add debugfs support to loop back pulse signal
Date: Tue, 26 Aug 2025 04:22:03 +0200 [thread overview]
Message-ID: <bb07efd0-d429-4fe0-bb55-b50b77e1cf88@lunn.ch> (raw)
In-Reply-To: <AM9PR04MB85057F4330081C86176805E78839A@AM9PR04MB8505.eurprd04.prod.outlook.com>
On Tue, Aug 26, 2025 at 01:50:06AM +0000, Wei Fang wrote:
> > On Mon, Aug 25, 2025 at 12:15:25PM +0800, Wei Fang wrote:
> > > The NETC Timer supports to loop back the output pulse signal of Fiper-n
> > > into Trigger-n input, so that we can leverage this feature to validate
> > > some other features without external hardware support.
> >
> > This seems like it should be a common feature which more PTP clocks
> > will support? Did you search around and see if there are other devices
> > with this?
>
> Actually, the NETC v4 Timer is the same IP used in the QorIQ platforms,
> but it is a different version, and the ptp_qoriq driver is not compatible
> with NETC v4 Timer, I have stated in the patch ("ptp: netc: add NETC V4
> Timer PTP driver support").
That does not answer my question. Does Marvell have this loopback
concept? Intel? Freescale? Microchip? Is there anything which prevents
other vendors implementing it?
Andrew
next prev parent reply other threads:[~2025-08-26 2:22 UTC|newest]
Thread overview: 25+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-08-25 4:15 [PATCH v5 net-next 00/15] Add NETC Timer PTP driver and add PTP support for i.MX95 Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 01/15] dt-bindings: ptp: add NETC Timer PTP clock Wei Fang
2025-08-25 15:05 ` Frank Li
2025-08-25 4:15 ` [PATCH v5 net-next 02/15] dt-bindings: net: move ptp-timer property to ethernet-controller.yaml Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 03/15] ptp: add helpers to get the phc_index by of_node or dev Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 04/15] ptp: netc: add NETC V4 Timer PTP driver support Wei Fang
2025-08-25 15:06 ` Frank Li
2025-08-25 4:15 ` [PATCH v5 net-next 05/15] ptp: netc: add PTP_CLK_REQ_PPS support Wei Fang
2025-08-25 15:09 ` Frank Li
2025-08-25 4:15 ` [PATCH v5 net-next 06/15] ptp: netc: add periodic pulse output support Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 07/15] ptp: netc: add external trigger stamp support Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 08/15] ptp: netc: add debugfs support to loop back pulse signal Wei Fang
2025-08-25 12:36 ` Andrew Lunn
2025-08-26 1:50 ` Wei Fang
2025-08-26 2:22 ` Andrew Lunn [this message]
2025-08-26 5:40 ` Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 09/15] MAINTAINERS: add NETC Timer PTP clock driver section Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 10/15] net: enetc: save the parsed information of PTP packet to skb->cb Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 11/15] net: enetc: extract enetc_update_ptp_sync_msg() to handle PTP Sync packets Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 12/15] net: enetc: remove unnecessary CONFIG_FSL_ENETC_PTP_CLOCK check Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 13/15] net: enetc: add PTP synchronization support for ENETC v4 Wei Fang
2025-08-25 15:17 ` Frank Li
2025-08-26 2:11 ` Wei Fang
2025-08-25 4:15 ` [PATCH v5 net-next 14/15] net: enetc: don't update sync packet checksum if checksum offload is used Wei Fang
2025-08-25 4:15 ` [PATCH v5 15/15] arm64: dts: imx95: add standard PCI device compatible string to NETC Timer Wei Fang
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