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Message-ID: <aGFR4PJv0pdKdD94@makrotopia.org>
Date: Sun, 29 Jun 2025 15:46:56 +0100
From: Daniel Golle <daniel@...rotopia.org>
To: Frank Wunderlich <linux@...web.de>
Cc: MyungJoo Ham <myungjoo.ham@...sung.com>,
	Kyungmin Park <kyungmin.park@...sung.com>,
	Chanwoo Choi <cw00.choi@...sung.com>,
	Georgi Djakov <djakov@...nel.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>, Andrew Lunn <andrew@...n.ch>,
	Vladimir Oltean <olteanv@...il.com>,
	"David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Frank Wunderlich <frank-w@...lic-files.de>,
	Johnson Wang <johnson.wang@...iatek.com>,
	Arınç ÜNAL <arinc.unal@...nc9.com>,
	Landen Chao <Landen.Chao@...iatek.com>,
	DENG Qingfang <dqfext@...il.com>,
	Sean Wang <sean.wang@...iatek.com>,
	Lorenzo Bianconi <lorenzo@...nel.org>, Felix Fietkau <nbd@....name>,
	linux-pm@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org,
	linux-mediatek@...ts.infradead.org
Subject: Re: [PATCH v7 07/14] arm64: dts: mediatek: mt7988: add basic
 ethernet-nodes

On Sat, Jun 28, 2025 at 06:54:42PM +0200, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@...lic-files.de>
> 
> Add basic ethernet related nodes.
> 
> Mac1+2 needs pcs (sgmii+usxgmii) to work correctly which will be linked
> later when driver is merged.
> 
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> Signed-off-by: Frank Wunderlich <frank-w@...lic-files.de>
> ---
> v6:
> - fix whitespace-errors for pdma irqs (spaces vs. tabs)
> - move sram from eth reg to own sram node (needs CONFIG_SRAM)
> 
> v5:
> - add reserved irqs and change names to fe0..fe3
> - change rx-ringX to pdmaX to be closer to documentation
> 
> v4:
> - comment for fixed-link on gmac0
> - update 2g5 phy node
>   - unit-name dec instead of hex to match reg property
>   - move compatible before reg
>   - drop phy-mode
> - add interrupts for RSS
> - add interrupt-names and drop reserved irqs for ethernet
> - some reordering
> - eth-reg and clock whitespace-fix based on angelos review
> ---
>  arch/arm64/boot/dts/mediatek/mt7988a.dtsi | 137 +++++++++++++++++++++-
>  1 file changed, 134 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
> index 560ec86dbec0..cf765a6b1fa8 100644
> --- a/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
> +++ b/arch/arm64/boot/dts/mediatek/mt7988a.dtsi
> @@ -680,7 +680,28 @@ xphyu3port0: usb-phy@...13000 {
>  			};
>  		};
>  
> -		clock-controller@...40000 {
> +		xfi_tphy0: phy@...20000 {
> +			compatible = "mediatek,mt7988-xfi-tphy";
> +			reg = <0 0x11f20000 0 0x10000>;
> +			clocks = <&xfi_pll CLK_XFIPLL_PLL_EN>,
> +				 <&topckgen CLK_TOP_XFI_PHY_0_XTAL_SEL>;
> +			clock-names = "xfipll", "topxtal";
> +			resets = <&watchdog 14>;
> +			mediatek,usxgmii-performance-errata;
> +			#phy-cells = <0>;
> +		};
> +
> +		xfi_tphy1: phy@...30000 {
> +			compatible = "mediatek,mt7988-xfi-tphy";
> +			reg = <0 0x11f30000 0 0x10000>;
> +			clocks = <&xfi_pll CLK_XFIPLL_PLL_EN>,
> +				 <&topckgen CLK_TOP_XFI_PHY_1_XTAL_SEL>;
> +			clock-names = "xfipll", "topxtal";
> +			resets = <&watchdog 15>;
> +			#phy-cells = <0>;
> +		};
> +
> +		xfi_pll: clock-controller@...40000 {
>  			compatible = "mediatek,mt7988-xfi-pll";
>  			reg = <0 0x11f40000 0 0x1000>;
>  			resets = <&watchdog 16>;
> @@ -714,19 +735,129 @@ phy_calibration_p3: calib@97c {
>  			};
>  		};
>  
> -		clock-controller@...00000 {
> +		ethsys: clock-controller@...00000 {
>  			compatible = "mediatek,mt7988-ethsys", "syscon";
>  			reg = <0 0x15000000 0 0x1000>;
>  			#clock-cells = <1>;
>  			#reset-cells = <1>;
>  		};
>  
> -		clock-controller@...31000 {
> +		ethwarp: clock-controller@...31000 {
>  			compatible = "mediatek,mt7988-ethwarp";
>  			reg = <0 0x15031000 0 0x1000>;
>  			#clock-cells = <1>;
>  			#reset-cells = <1>;
>  		};
> +
> +		eth: ethernet@...00000 {
> +			compatible = "mediatek,mt7988-eth";
> +			reg = <0 0x15100000 0 0x80000>;

I think this should be

reg = <0 0x15100000 0 0x40000>;

as the range from 15140000 ~ 1517ffff is used as SRAM on MT7981/MT7986 and
doesn't seem to be used at all on MT7988.

root@...nWrt:~# devmem 0x15140000 32
0xDEADBEEF
...
root@...nWrt:~# devmem 0x1517fffc 32
0xDEADBEEF
(with 0xDEADBEEF all that range)

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