netdev - Re: [PATCH net-next v2 7/7] net: stmmac: deprecate "snps,en-tx-lpi-clockgating" property

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Message-ID: <CA+V-a8sasAGkwCWGnbBEjeMRVM79xVVzTq15uJQ_7Q+YwB1QpA@mail.gmail.com>
Date: Thu, 13 Mar 2025 13:38:12 +0000
From: "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To: "Russell King (Oracle)" <rmk+kernel@...linux.org.uk>
Cc: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>, 
	Albert Ou <aou@...s.berkeley.edu>, Alexandre Ghiti <alex@...ti.fr>, 
	Alexandre Torgue <alexandre.torgue@...s.st.com>, Andrew Lunn <andrew+netdev@...n.ch>, 
	Conor Dooley <conor+dt@...nel.org>, Conor Dooley <conor@...nel.org>, 
	"David S. Miller" <davem@...emloft.net>, devicetree@...r.kernel.org, 
	Emil Renner Berthing <kernel@...il.dk>, Eric Dumazet <edumazet@...gle.com>, 
	Giuseppe Cavallaro <peppe.cavallaro@...com>, Jakub Kicinski <kuba@...nel.org>, 
	Jose Abreu <joabreu@...opsys.com>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, 
	linux-arm-kernel@...ts.infradead.org, linux-riscv@...ts.infradead.org, 
	linux-stm32@...md-mailman.stormreply.com, 
	Maxime Coquelin <mcoquelin.stm32@...il.com>, Minda Chen <minda.chen@...rfivetech.com>, 
	netdev@...r.kernel.org, Palmer Dabbelt <palmer@...belt.com>, 
	Paolo Abeni <pabeni@...hat.com>, Paul Walmsley <paul.walmsley@...ive.com>, 
	Rob Herring <robh@...nel.org>
Subject: Re: [PATCH net-next v2 7/7] net: stmmac: deprecate
 "snps,en-tx-lpi-clockgating" property

On Wed, Mar 12, 2025 at 9:58 AM Russell King (Oracle)
<rmk+kernel@...linux.org.uk> wrote:
>
> Whether the MII transmit clock can be stopped is primarily a property
> of the PHY (there is a capability bit that should be checked first.)
> Whether the MAC is capable of stopping the transmit clock is a separate
> issue, but this is already handled by the core DesignWare MAC code.
>
> Therefore, snps,en-tx-lpi-clockgating is technically incorrect, and
> this commit adds a warning should a DT be encountered with the property
> present.
>
> However, we keep backwards compatibility.
>
> Signed-off-by: Russell King (Oracle) <rmk+kernel@...linux.org.uk>
> ---
>  drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c | 5 ++++-
>  1 file changed, 4 insertions(+), 1 deletion(-)
>
Reviewed-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>

Cheers,
Prabhakar