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Message-ID: <20240327152839.GN403975@kernel.org>
Date: Wed, 27 Mar 2024 15:28:39 +0000
From: Simon Horman <horms@...nel.org>
To: Pawel Dembicki <paweldembicki@...il.com>
Cc: netdev@...r.kernel.org, Andrew Lunn <andrew@...n.ch>,
Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Stefan Eichenberger <eichest@...il.com>,
Dimitri Fedrau <dima.fedrau@...il.com>,
linux-kernel@...r.kernel.org
Subject: Re: [PATCH net-next 2/2] net: phy: marvell: implement cable-test for
88E308X/88E609X family
On Tue, Mar 26, 2024 at 03:12:36PM +0100, Pawel Dembicki wrote:
> This commit implements VCT in 88E308X/88E609X Family.
>
> It require two workarounds with some magic configuration.
> Regular use require only one register configuration. But Open Circuit
> require second workaround.
> It cause implementation two phases for fault length measuring.
>
> Fast Ethernet PHY have implemented very simple version of VCT. It's
> complitley different than vct5 or vct7.
>
> Signed-off-by: Pawel Dembicki <paweldembicki@...il.com>
> ---
> drivers/net/phy/marvell.c | 252 ++++++++++++++++++++++++++++++++++++++
> 1 file changed, 252 insertions(+)
>
> diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c
..
> +u32 m88e3082_vct_distrfln_2_cm(u8 distrfln)
nit: This function seems to only be used in this file.
If so it should be static.
> +{
> + if (distrfln < 24)
> + return 0;
> +
> + /* Original function for meters: y = 0.7861x - 18.862 */
> + return (7861 * distrfln - 188620) / 100;
> +}
..
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