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Date:   Mon, 20 Nov 2023 09:37:23 -0800
From:   Jakub Kicinski <kuba@kernel.org>
To:     Vladimir Oltean <vladimir.oltean@nxp.com>
Cc:     =?UTF-8?B?S8O2cnk=?= Maincent <kory.maincent@bootlin.com>,
        Florian Fainelli <florian.fainelli@broadcom.com>,
        Broadcom internal kernel review list 
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        Claudiu Beznea <claudiu.beznea@tuxon.dev>,
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        Horatiu Vultur <horatiu.vultur@microchip.com>,
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        Maxime Chevallier <maxime.chevallier@bootlin.com>
Subject: Re: [PATCH net-next v7 15/16] net: ethtool: ts: Let the active time
 stamping layer be selectable
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        <20231114-feature_ptp_netnext-v7-15-472e77951e40@bootlin.com>
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On Mon, 20 Nov 2023 16:23:16 +0200 Vladimir Oltean wrote:
> In previous email discussions, I was proposing to Jakub and you "what if
> we didn't let user space select a specific layer like PHY_TIMESTAMPING
> or MAC_TIMESTAMPING at all, but just select a specific phc_index as the
> provider of hardware timestamps"?

What about my use case of having a NIC which can stamp at a low rate
at the PHY (for PTP) and high rate at the DMA block (for congestion
control)? Both stamp points have the same PHC index.