linux-kernel - Re: [PATCH net-next v6 1/6] dt-bindings: net: sun8i-emac: Add A523 GMAC200 compatible

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Message-ID: <20250915192326.GA3089483-robh@kernel.org>
Date: Mon, 15 Sep 2025 14:23:26 -0500
From: Rob Herring <robh@...nel.org>
To: Chen-Yu Tsai <wens@...nel.org>
Cc: Andrew Lunn <andrew+netdev@...n.ch>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Chen-Yu Tsai <wens@...e.org>,
	Jernej Skrabec <jernej@...nel.org>,
	Samuel Holland <samuel@...lland.org>, netdev@...r.kernel.org,
	devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
	linux-sunxi@...ts.linux.dev, linux-kernel@...r.kernel.org,
	Andre Przywara <andre.przywara@....com>
Subject: Re: [PATCH net-next v6 1/6] dt-bindings: net: sun8i-emac: Add A523
 GMAC200 compatible

On Sat, Sep 13, 2025 at 06:13:44PM +0800, Chen-Yu Tsai wrote:
> From: Chen-Yu Tsai <wens@...e.org>
> 
> The Allwinner A523 SoC family has a second Ethernet controller, called
> the GMAC200 in the BSP and T527 datasheet, and referred to as GMAC1 for
> numbering. This controller, according to BSP sources, is fully
> compatible with a slightly newer version of the Synopsys DWMAC core.
> The glue layer around the controller is the same as found around older
> DWMAC cores on Allwinner SoCs. The only slight difference is that since
> this is the second controller on the SoC, the register for the clock
> delay controls is at a different offset. Last, the integration includes
> a dedicated clock gate for the memory bus and the whole thing is put in
> a separately controllable power domain.
> 
> Add a compatible string entry for it, and work in the requirements for
> a second clock and a power domain.
> 
> Signed-off-by: Chen-Yu Tsai <wens@...e.org>
> ---
> Changes since v4:
> - Move clock-names list to main schema (Rob)
> Changes since v2:
> - Added "select" to avoid matching against all dwmac entries
> Changes since v1:
> - Switch to generic (tx|rx)-internal-delay-ps properties
> ---
>  .../net/allwinner,sun8i-a83t-emac.yaml        | 95 ++++++++++++++++++-
>  1 file changed, 93 insertions(+), 2 deletions(-)

Reviewed-by: Rob Herring (Arm) <robh@...nel.org>