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Message-ID: <20231206133816.GA1914715-robh@kernel.org>
Date: Wed, 6 Dec 2023 07:38:16 -0600
From: Rob Herring <robh@...nel.org>
To: Daniel Golle <daniel@...rotopia.org>
Cc: "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>, 
	Chunfeng Yun <chunfeng.yun@...iatek.com>, Vinod Koul <vkoul@...nel.org>, 
	Kishon Vijay Abraham I <kishon@...nel.org>, Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>, 
	Sean Wang <sean.wang@...iatek.com>, Mark Lee <Mark-MC.Lee@...iatek.com>, 
	Lorenzo Bianconi <lorenzo@...nel.org>, Matthias Brugger <matthias.bgg@...il.com>, 
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>, Andrew Lunn <andrew@...n.ch>, 
	Heiner Kallweit <hkallweit1@...il.com>, Russell King <linux@...linux.org.uk>, 
	Alexander Couzens <lynxis@...0.eu>, Qingfang Deng <dqfext@...il.com>, 
	SkyLake Huang <SkyLake.Huang@...iatek.com>, Philipp Zabel <p.zabel@...gutronix.de>, 
	netdev@...r.kernel.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org, 
	linux-mediatek@...ts.infradead.org, linux-phy@...ts.infradead.org
Subject: Re: [RFC PATCH v2 7/8] dt-bindings: net: mediatek,net: fix and
 complete mt7988-eth binding

On Wed, Dec 06, 2023 at 01:45:02AM +0000, Daniel Golle wrote:
> Complete support for MT7988 which comes with 3 MACs, SRAM for DMA
> descriptors and uses a dedicated PCS for the SerDes units.
> 
> Fixes: c94a9aabec36 ("dt-bindings: net: mediatek,net: add mt7988-eth binding")
> Signed-off-by: Daniel Golle <daniel@...rotopia.org>
> ---
>  .../devicetree/bindings/net/mediatek,net.yaml | 148 +++++++++++++++++-
>  1 file changed, 146 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/net/mediatek,net.yaml b/Documentation/devicetree/bindings/net/mediatek,net.yaml
> index 030d106bc7d3f..ca0667c51c1c2 100644
> --- a/Documentation/devicetree/bindings/net/mediatek,net.yaml
> +++ b/Documentation/devicetree/bindings/net/mediatek,net.yaml
> @@ -28,7 +28,10 @@ properties:
>        - ralink,rt5350-eth
>  
>    reg:
> -    maxItems: 1
> +    minItems: 1
> +    items:
> +      - description: Base of registers used to program the ethernet controller
> +      - description: SRAM region used for DMA descriptors

Is this a dedicated SRAM for this purpose, or a common one partitioned 
up. mmio-sram and a phandle is how to do the latter.

>  
>    clocks: true
>    clock-names: true
> @@ -115,6 +118,9 @@ allOf:
>                - mediatek,mt7623-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 1
> +
>          interrupts:
>            maxItems: 3
>  
> @@ -149,6 +155,9 @@ allOf:
>                - mediatek,mt7621-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 1
> +
>          interrupts:
>            maxItems: 1
>  
> @@ -174,6 +183,9 @@ allOf:
>              const: mediatek,mt7622-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 1
> +
>          interrupts:
>            maxItems: 3
>  
> @@ -215,6 +227,9 @@ allOf:
>              const: mediatek,mt7629-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 1
> +
>          interrupts:
>            maxItems: 3
>  
> @@ -257,6 +272,9 @@ allOf:
>              const: mediatek,mt7981-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 1
> +
>          interrupts:
>            minItems: 4
>  
> @@ -295,6 +313,9 @@ allOf:
>              const: mediatek,mt7986-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 1
> +
>          interrupts:
>            minItems: 4
>  
> @@ -333,8 +354,13 @@ allOf:
>              const: mediatek,mt7988-eth
>      then:
>        properties:
> +        reg:
> +          maxItems: 2

Don't need maxItems here. That's already the max.

> +          minItems: 2
> +
>          interrupts:
>            minItems: 4
> +          maxItems: 4
>  
>          clocks:
>            minItems: 24
> @@ -368,7 +394,7 @@ allOf:
>              - const: top_netsys_warp_sel
>  
>  patternProperties:
> -  "^mac@[0-1]$":
> +  "^mac@[0-2]$":
>      type: object
>      unevaluatedProperties: false
>      allOf:
> @@ -382,6 +408,9 @@ patternProperties:
>        reg:
>          maxItems: 1
>  
> +      phys:
> +        maxItems: 1
> +
>      required:
>        - reg
>        - compatible
> @@ -559,3 +588,118 @@ examples:
>          };
>        };
>      };
> +
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    #include <dt-bindings/clock/mediatek,mt7988-clk.h>


Why is fixing the binding needing a new example? Is this example really 
different enough to justify a whole other example?

> +
> +    soc {
> +      #address-cells = <2>;
> +      #size-cells = <2>;
> +
> +      ethernet@...00000 {
> +        compatible = "mediatek,mt7988-eth";
> +        reg = <0 0x15100000 0 0x80000>, <0 0x15400000 0 0x380000>;
> +        interrupts = <GIC_SPI 196 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 197 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 198 IRQ_TYPE_LEVEL_HIGH>,
> +                     <GIC_SPI 199 IRQ_TYPE_LEVEL_HIGH>;
> +
> +        clocks = <&ethsys CLK_ETHDMA_XGP1_EN>,
> +                 <&ethsys CLK_ETHDMA_XGP2_EN>,
> +                 <&ethsys CLK_ETHDMA_XGP3_EN>,
> +                 <&ethsys CLK_ETHDMA_FE_EN>,
> +                 <&ethsys CLK_ETHDMA_GP2_EN>,
> +                 <&ethsys CLK_ETHDMA_GP1_EN>,
> +                 <&ethsys CLK_ETHDMA_GP3_EN>,
> +                 <&ethsys CLK_ETHDMA_ESW_EN>,
> +                 <&ethsys CLK_ETHDMA_CRYPT0_EN>,
> +                 <&ethwarp CLK_ETHWARP_WOCPU2_EN>,
> +                 <&ethwarp CLK_ETHWARP_WOCPU1_EN>,
> +                 <&ethwarp CLK_ETHWARP_WOCPU0_EN>,
> +                 <&topckgen CLK_TOP_ETH_GMII_SEL>,
> +                 <&topckgen CLK_TOP_ETH_REFCK_50M_SEL>,
> +                 <&topckgen CLK_TOP_ETH_SYS_200M_SEL>,
> +                 <&topckgen CLK_TOP_ETH_SYS_SEL>,
> +                 <&topckgen CLK_TOP_ETH_XGMII_SEL>,
> +                 <&topckgen CLK_TOP_ETH_MII_SEL>,
> +                 <&topckgen CLK_TOP_NETSYS_SEL>,
> +                 <&topckgen CLK_TOP_NETSYS_500M_SEL>,
> +                 <&topckgen CLK_TOP_NETSYS_PAO_2X_SEL>,
> +                 <&topckgen CLK_TOP_NETSYS_SYNC_250M_SEL>,
> +                 <&topckgen CLK_TOP_NETSYS_PPEFB_250M_SEL>,
> +                 <&topckgen CLK_TOP_NETSYS_WARP_SEL>;
> +
> +        clock-names = "xgp1", "xgp2", "xgp3", "fe", "gp2", "gp1",
> +                      "gp3", "esw", "crypto",
> +                      "ethwarp_wocpu2", "ethwarp_wocpu1",
> +                      "ethwarp_wocpu0", "top_eth_gmii_sel",
> +                      "top_eth_refck_50m_sel", "top_eth_sys_200m_sel",
> +                      "top_eth_sys_sel", "top_eth_xgmii_sel",
> +                      "top_eth_mii_sel", "top_netsys_sel",
> +                      "top_netsys_500m_sel", "top_netsys_pao_2x_sel",
> +                      "top_netsys_sync_250m_sel",
> +                      "top_netsys_ppefb_250m_sel",
> +                      "top_netsys_warp_sel";
> +        assigned-clocks = <&topckgen CLK_TOP_NETSYS_2X_SEL>,
> +                          <&topckgen CLK_TOP_NETSYS_GSW_SEL>,
> +                          <&topckgen CLK_TOP_USXGMII_SBUS_0_SEL>,
> +                          <&topckgen CLK_TOP_USXGMII_SBUS_1_SEL>,
> +                          <&topckgen CLK_TOP_SGM_0_SEL>,
> +                          <&topckgen CLK_TOP_SGM_1_SEL>;
> +        assigned-clock-parents = <&apmixedsys CLK_APMIXED_NET2PLL>,
> +                                 <&topckgen CLK_TOP_NET1PLL_D4>,
> +                                 <&topckgen CLK_TOP_NET1PLL_D8_D4>,
> +                                 <&topckgen CLK_TOP_NET1PLL_D8_D4>,
> +                                 <&apmixedsys CLK_APMIXED_SGMPLL>,
> +                                 <&apmixedsys CLK_APMIXED_SGMPLL>;
> +        mediatek,ethsys = <&ethsys>;
> +        mediatek,infracfg = <&topmisc>;
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        mac@0 {
> +          compatible = "mediatek,eth-mac";
> +          reg = <0>;
> +          phy-mode = "internal"; /* CPU port of built-in 1GE switch */
> +
> +          fixed-link {
> +            speed = <10000>;
> +            full-duplex;
> +            pause;
> +          };
> +        };
> +
> +        mac@1 {
> +          compatible = "mediatek,eth-mac";
> +          reg = <1>;
> +          phy-handle = <&int_2p5g_phy>;
> +        };
> +
> +        mac@2 {
> +          compatible = "mediatek,eth-mac";
> +          reg = <2>;
> +          pcs-handle = <&usxgmiisys0>;
> +          phy-handle = <&phy0>;
> +        };
> +
> +        mdio_bus: mdio-bus {
> +          #address-cells = <1>;
> +          #size-cells = <0>;
> +
> +          /* external PHY */
> +          phy0: ethernet-phy@0 {
> +            reg = <0>;
> +            compatible = "ethernet-phy-ieee802.3-c45";
> +          };
> +
> +          /* internal 2.5G PHY */
> +          int_2p5g_phy: ethernet-phy@15 {
> +            reg = <15>;
> +            compatible = "ethernet-phy-ieee802.3-c45";
> +            phy-mode = "internal";
> +          };
> +        };
> +      };
> +    };
> -- 
> 2.43.0

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