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Message-ID: <CAJhJPsWOOiPnkr-Mk0BXOgCBSMyFx+x7STbO910cxc1RoC8_dw@mail.gmail.com>
Date: Mon, 28 Aug 2023 12:38:37 +0800
From: Keguang Zhang <keguang.zhang@...il.com>
To: Serge Semin <fancer.lancer@...il.com>
Cc: netdev@...r.kernel.org, devicetree@...r.kernel.org,
linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org,
Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>, Conor Dooley <conor+dt@...nel.org>,
"David S . Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Giuseppe Cavallaro <peppe.cavallaro@...com>,
Alexandre Torgue <alexandre.torgue@...s.st.com>, Jose Abreu <joabreu@...opsys.com>,
Serge Semin <Sergey.Semin@...kalelectronics.ru>,
Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v3 2/4] dt-bindings: net: Add Loongson-1 Ethernet Controller
On Sun, Aug 27, 2023 at 5:04 AM Serge Semin <fancer.lancer@...il.com> wrote:
>
> On Thu, Aug 24, 2023 at 08:50:10PM +0800, Keguang Zhang wrote:
> > Add devicetree binding document for Loongson-1 Ethernet controller.
> >
> > Signed-off-by: Keguang Zhang <keguang.zhang@...il.com>
> > Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
> > ---
> > V2 -> V3: Split the DT-schema file into loongson,ls1b-gmac.yaml
> > and loongson,ls1c-emac.yaml (suggested by Serge Semin)
> > Change the compatibles to loongson,ls1b-gmac and loongson,ls1c-emac
> > Rename loongson,dwmac-syscon to loongson,ls1-syscon
> > Amend the title
> > Add description
> > Add Reviewed-by tag from Krzysztof Kozlowski(Sorry! I'm not sure)
> > V1 -> V2: Fix "clock-names" and "interrupt-names" property
> > Rename the syscon property to "loongson,dwmac-syscon"
> > Drop "phy-handle" and "phy-mode" requirement
> > Revert adding loongson,ls1b-dwmac/loongson,ls1c-dwmac
> > to snps,dwmac.yaml
> >
> > .../bindings/net/loongson,ls1b-gmac.yaml | 115 ++++++++++++++++++
> > .../bindings/net/loongson,ls1c-emac.yaml | 114 +++++++++++++++++
> > 2 files changed, 229 insertions(+)
> > create mode 100644 Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
> > create mode 100644 Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
> >
> > diff --git a/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
> > new file mode 100644
> > index 000000000000..f661d5b86649
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/loongson,ls1b-gmac.yaml
> > @@ -0,0 +1,115 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/loongson,ls1b-gmac.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Loongson-1B Gigabit Ethernet MAC Controller
> > +
> > +maintainers:
> > + - Keguang Zhang <keguang.zhang@...il.com>
> > +
>
> > +description:
>
> Use "|" to keep the text formatting.
> description: |
>
> > + Loongson-1B Gigabit Ethernet MAC Controller is based on
> > + Synopsys DesignWare MAC (version 3.50a).
> > +
>
> > + Main features
> > + - Dual 10/100/1000Mbps GMAC controllers
> > + - Full-duplex operation (IEEE 802.3x flow control automatic transmission)
> > + - Half-duplex operation (CSMA/CD Protocol and back-pressure support)
> > + - RX Checksum Offload
> > + - TX Checksum insertion
> > + - MII interface
> > + - RGMII interface
>
> If only all the DW *MAC-based devices have such info in the
> bindings the life would have been much easier...
>
> > +
> > +select:
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - loongson,ls1b-gmac
> > + required:
> > + - compatible
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - enum:
> > + - loongson,ls1b-gmac
> > + - const: snps,dwmac-3.50a
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + clocks:
> > + maxItems: 1
> > +
>
> > + clock-names:
> > + items:
> > + - const: stmmaceth
>
> since there is a single clock then just:
> clock-names:
> const: stmmaceth
>
> > +
> > + interrupts:
> > + maxItems: 1
> > +
>
> > + interrupt-names:
> > + items:
> > + - const: macirq
>
> ditto. just
> interrupt-names:
> const: macirq
>
> > +
> > + loongson,ls1-syscon:
> > + $ref: /schemas/types.yaml#/definitions/phandle
> > + description:
> > + Phandle to the syscon containing some extra configurations
> > + including PHY interface mode.
> > +
>
> > + phy-mode:
> > + items:
> > + - enum:
> > + - mii
> > + - rgmii-id
>
> it's a single string then just:
> phy-mode:
> enum: ...
>
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - clock-names
> > + - interrupts
> > + - interrupt-names
> > + - loongson,ls1-syscon
> > +
> > +allOf:
> > + - $ref: snps,dwmac.yaml#
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/loongson,ls1x-clk.h>
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > +
> > + gmac0: ethernet@...10000 {
> > + compatible = "loongson,ls1b-gmac", "snps,dwmac-3.50a";
> > + reg = <0x1fe10000 0x10000>;
> > +
> > + clocks = <&clkc LS1X_CLKID_AHB>;
> > + clock-names = "stmmaceth";
> > +
> > + interrupt-parent = <&intc1>;
> > + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> > + interrupt-names = "macirq";
> > +
> > + loongson,ls1-syscon = <&syscon>;
> > +
> > + phy-handle = <&phy0>;
> > + phy-mode = "mii";
> > + snps,pbl = <1>;
> > +
> > + mdio {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + compatible = "snps,dwmac-mdio";
> > +
> > + phy0: ethernet-phy@0 {
> > + reg = <0x0>;
> > + };
> > + };
> > + };
> > diff --git a/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml b/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
> > new file mode 100644
> > index 000000000000..1ffad41941bf
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/loongson,ls1c-emac.yaml
> > @@ -0,0 +1,114 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/loongson,ls1c-emac.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: Loongson-1C Ethernet MAC Controller
> > +
> > +maintainers:
> > + - Keguang Zhang <keguang.zhang@...il.com>
> > +
>
> > +description:
>
> the same comment about the "|" modifier.
>
> > + Loongson-1C Ethernet MAC Controller is based on
> > + Synopsys DesignWare MAC (version 3.50a).
> > +
>
> > + Main features
> > + - 10/100Mbps
> > + - Full-duplex operation (IEEE 802.3x flow control automatic transmission)
> > + - Half-duplex operation (CSMA/CD Protocol and back-pressure support)
> > + - IEEE 802.1Q VLAN tag detection for reception frames
> > + - MII interface
> > + - RMII interface
>
> Based on the plat_stmmacenet_data data defined for the LS1C MAC it
> also support support Tx COE. Isn't it? What about Rx COE?
>
According to the value read from HW Feature Register(offset 0x1058),
both TXCOESEL an
RXTYP1COE/RXTYP2COE are zero.
Therefore, neither TX COE nor RX COE is supported by LS1C MAC.
Current plat_stmmacenet_data is Inaccurate.
> > +
> > +select:
> > + properties:
> > + compatible:
> > + contains:
> > + enum:
> > + - loongson,ls1c-emac
> > + required:
> > + - compatible
> > +
> > +properties:
> > + compatible:
> > + items:
> > + - enum:
> > + - loongson,ls1c-emac
> > + - const: snps,dwmac-3.50a
> > +
> > + reg:
> > + maxItems: 1
> > +
> > + clocks:
> > + maxItems: 1
> > +
>
> > + clock-names:
> > + items:
> > + - const: stmmaceth
>
> clock-names:
> const: stmmaceth
> ?
>
> > +
> > + interrupts:
> > + maxItems: 1
> > +
>
> > + interrupt-names:
> > + items:
> > + - const: macirq
>
> interrupt-names:
> const: macirq
> ?
>
> > +
> > + loongson,ls1-syscon:
> > + $ref: /schemas/types.yaml#/definitions/phandle
> > + description:
> > + Phandle to the syscon containing some extra configurations
> > + including PHY interface mode.
> > +
>
> > + phy-mode:
> > + items:
> > + - enum:
> > + - mii
> > + - rmii
>
> phy-mode:
> enum: ...
> ?
>
> -Serge(y)
>
> > +
> > +required:
> > + - compatible
> > + - reg
> > + - clocks
> > + - clock-names
> > + - interrupts
> > + - interrupt-names
> > + - loongson,ls1-syscon
> > +
> > +allOf:
> > + - $ref: snps,dwmac.yaml#
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > + - |
> > + #include <dt-bindings/clock/loongson,ls1x-clk.h>
> > + #include <dt-bindings/interrupt-controller/irq.h>
> > +
> > + emac: ethernet@...10000 {
> > + compatible = "loongson,ls1c-emac", "snps,dwmac-3.50a";
> > + reg = <0x1fe10000 0x10000>;
> > +
> > + clocks = <&clkc LS1X_CLKID_AHB>;
> > + clock-names = "stmmaceth";
> > +
> > + interrupt-parent = <&intc1>;
> > + interrupts = <2 IRQ_TYPE_LEVEL_HIGH>;
> > + interrupt-names = "macirq";
> > +
> > + loongson,ls1-syscon = <&syscon>;
> > +
> > + phy-handle = <&phy0>;
> > + phy-mode = "mii";
> > + snps,pbl = <1>;
> > +
> > + mdio {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > + compatible = "snps,dwmac-mdio";
> > +
> > + phy0: ethernet-phy@13 {
> > + reg = <0x13>;
> > + };
> > + };
> > + };
> > --
> > 2.39.2
> >
> >
--
Best regards,
Keguang Zhang
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