netdev - Re: [PATCH v2 3/7] dt-bindings: net: Add DT bindings for DWMAC on NXP S32G/R SoCs

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Message-ID: <ZwvoOpgApLQWWY05@lsv051416.swis.nl-cdc01.nxp.com>
Date: Sun, 13 Oct 2024 17:33:14 +0200
From: Jan Petrous <jan.petrous@....nxp.com>
To: Krzysztof Kozlowski <krzk@...nel.org>
Cc: "David S. Miller" <davem@...emloft.net>,
	Eric Dumazet <edumazet@...gle.com>,
	Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Alexandre Torgue <alexandre.torgue@...s.st.com>,
	Jose Abreu <joabreu@...opsys.com>,
	Maxime Coquelin <mcoquelin.stm32@...il.com>,
	Vinod Koul <vkoul@...nel.org>, Andrew Lunn <andrew@...n.ch>,
	Heiner Kallweit <hkallweit1@...il.com>,
	Russell King <linux@...linux.org.uk>,
	Richard Cochran <richardcochran@...il.com>,
	Giuseppe Cavallaro <peppe.cavallaro@...com>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"devicetree@...r.kernel.org" <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-stm32@...md-mailman.stormreply.com" <linux-stm32@...md-mailman.stormreply.com>,
	"linux-arm-kernel@...ts.infradead.org" <linux-arm-kernel@...ts.infradead.org>,
	"linux-arm-msm@...r.kernel.org" <linux-arm-msm@...r.kernel.org>,
	dl-S32 <S32@....com>
Subject: Re: [PATCH v2 3/7] dt-bindings: net: Add DT bindings for DWMAC on
 NXP S32G/R SoCs

On Mon, Aug 19, 2024 at 08:21:03AM +0200, Krzysztof Kozlowski wrote:
> On 18/08/2024 23:50, Jan Petrous (OSS) wrote:
> > Add basic description for DWMAC ethernet IP on NXP S32G2xx, S32G3xx
> > and S32R45 automotive series SoCs.
> 
> Fix your email threading. b4 handle everything correctly, so start using it.
> 

Done. V3 will be sent by b4/msmtp.

> > 
> > Signed-off-by: Jan Petrous (OSS) <jan.petrous@....nxp.com>
> > ---
> >  .../bindings/net/nxp,s32cc-dwmac.yaml         | 127 ++++++++++++++++++
> >  .../devicetree/bindings/net/snps,dwmac.yaml   |   1 +
> >  2 files changed, 128 insertions(+)
> >  create mode 100644 Documentation/devicetree/bindings/net/nxp,s32cc-dwmac.yaml
> > 
> > diff --git a/Documentation/devicetree/bindings/net/nxp,s32cc-dwmac.yaml b/Documentation/devicetree/bindings/net/nxp,s32cc-dwmac.yaml
> > new file mode 100644
> > index 000000000000..443ad918a9a5
> > --- /dev/null
> > +++ b/Documentation/devicetree/bindings/net/nxp,s32cc-dwmac.yaml
> 
> Filename based on compatible, so what does "cc" stand for?

Ok, removed 'cc'.

> 
> > @@ -0,0 +1,127 @@
> > +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> > +# Copyright 2021-2024 NXP
> > +%YAML 1.2
> > +---
> > +$id: http://devicetree.org/schemas/net/nxp,s32cc-dwmac.yaml#
> > +$schema: http://devicetree.org/meta-schemas/core.yaml#
> > +
> > +title: NXP S32G2xx/S32G3xx/S32R45 GMAC ethernet controller
> > +
> > +maintainers:
> > +  - Jan Petrous (OSS) <jan.petrous@....nxp.com>
> > +
> > +description: |
> 
> Do not need '|' unless you need to preserve formatting.

Removed.

> 
> > +  This device is a platform glue layer for stmmac.
> 
> Drop description of driver and instead describe the hardware.

Changed in v3.

> 
> > +  Please see snps,dwmac.yaml for the other unchanged properties.
> > +
> > +properties:
> > +  compatible:
> > +    enum:
> > +      - nxp,s32g2-dwmac
> > +      - nxp,s32g3-dwmac
> > +      - nxp,s32r45-dwmac
> > +
> > +  reg:
> > +    items:
> > +      - description: Main GMAC registers
> > +      - description: GMAC PHY mode control register
> > +
> > +  interrupts:
> > +    description: Common GMAC interrupt
> 
> No, instead maxItems: 1
> 

Done.

> > +
> > +  interrupt-names:
> > +    const: macirq
> > +
> > +  clocks:
> > +    items:
> > +      - description: Main GMAC clock
> > +      - description: Transmit clock
> > +      - description: Receive clock
> > +      - description: PTP reference clock
> > +
> > +  clock-names:
> > +    items:
> > +      - const: stmmaceth
> > +      - const: tx
> > +      - const: rx
> > +      - const: ptp_ref
> > +
> > +required:
> > +  - compatible
> > +  - reg
> > +  - interrupts
> > +  - interrupt-names
> > +  - clocks
> > +  - clock-names
> > +  - phy-mode
> 
> Drop, snps,dwmac requires this.

Compressed to 'clocks' and 'clock-names'.

> 
> > +
> > +allOf:
> > +  - $ref: snps,dwmac.yaml#
> > +
> > +unevaluatedProperties: false
> > +
> > +examples:
> > +  - |
> > +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> > +    #include <dt-bindings/interrupt-controller/irq.h>
> > +    #include <dt-bindings/phy/phy.h>
> > +    bus {
> > +      #address-cells = <2>;
> > +      #size-cells = <2>;
> > +
> > +      ethernet@...3c000 {
> > +        compatible = "nxp,s32cc-dwmac";
> > +        reg = <0x0 0x4033c000 0x0 0x2000>, /* gmac IP */
> > +              <0x0 0x4007c004 0x0 0x4>;    /* GMAC_0_CTRL_STS */
> > +        interrupt-parent = <&gic>;
> > +        interrupts = <GIC_SPI 57 IRQ_TYPE_LEVEL_HIGH>;
> > +        interrupt-names = "macirq";
> > +        snps,mtl-rx-config = <&mtl_rx_setup>;
> > +        snps,mtl-tx-config = <&mtl_tx_setup>;
> > +        clocks = <&clks 24>, <&clks 17>, <&clks 16>, <&clks 15>;
> > +        clock-names = "stmmaceth", "tx", "rx", "ptp_ref";
> > +        phy-mode = "rgmii-id";
> > +        phy-handle = <&phy0>;
> > +
> > +        mtl_rx_setup: rx-queues-config {
> > +          snps,rx-queues-to-use = <5>;
> > +
> > +          queue0 {
> > +          };
> > +          queue1 {
> > +          };
> 
> 
> Why listing empty nodes?

Removed in v3.

> 
> Best regards,
> Krzysztof
> 

Thanks.
/Jan