netdev - Re: [PATCH v1 2/4] dt-bindings: net: dsa: qca,ar9331 switch documentation

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Date:   Wed, 16 Oct 2019 14:21:52 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Oleksij Rempel <o.rempel@...gutronix.de>
Cc:     Chris Snook <chris.snook@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        James Hogan <jhogan@...nel.org>,
        Jay Cliburn <jcliburn@...il.com>,
        Mark Rutland <mark.rutland@....com>,
        Paul Burton <paul.burton@...s.com>,
        Ralf Baechle <ralf@...ux-mips.org>,
        Rob Herring <robh+dt@...nel.org>,
        Russell King <linux@...linux.org.uk>,
        Vivien Didelot <vivien.didelot@...il.com>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        "David S. Miller" <davem@...emloft.net>, netdev@...r.kernel.org,
        linux-kernel@...r.kernel.org, devicetree@...r.kernel.org,
        linux-mips@...r.kernel.org
Subject: Re: [PATCH v1 2/4] dt-bindings: net: dsa: qca,ar9331 switch
 documentation

On Mon, Oct 14, 2019 at 08:15:47AM +0200, Oleksij Rempel wrote:
> Atheros AR9331 has built-in 5 port switch. The switch can be configured
> to use all 5 or 4 ports. One of built-in PHYs can be used by first built-in
> ethernet controller or to be used directly by the switch over second ethernet
> controller.
> 
> Signed-off-by: Oleksij Rempel <o.rempel@...gutronix.de>
> ---
>  .../devicetree/bindings/net/dsa/ar9331.txt    | 155 ++++++++++++++++++
>  1 file changed, 155 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/dsa/ar9331.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/ar9331.txt b/Documentation/devicetree/bindings/net/dsa/ar9331.txt
> new file mode 100644
> index 000000000000..b0f95fd19584
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/dsa/ar9331.txt
> @@ -0,0 +1,155 @@
> +Atheros AR9331 built-in switch
> +=============================
> +
> +It is a switch built-in to Atheros AR9331 WiSoC and addressable over internal
> +MDIO bus. All PHYs are build-in as well. 
> +
> +Required properties:
> +
> + - compatible: should be: "qca,ar9331-switch" 
> + - reg: Address on the MII bus for the switch.
> + - resets : Must contain an entry for each entry in reset-names.
> + - reset-names : Must include the following entries: "switch"
> + - interrupt-parent: Phandle to the parent interrupt controller
> + - interrupts: IRQ line for the switch
> + - interrupt-controller: Indicates the switch is itself an interrupt
> +   controller. This is used for the PHY interrupts.
> + - #interrupt-cells: must be 1
> + - mdio: Container of PHY and devices on the switches MDIO bus.
> +
> +See Documentation/devicetree/bindings/net/dsa/dsa.txt for a list of additional
> +required and optional properties.
> +Examples:
> +
> +eth0: ethernet@...00000 {
> +	compatible = "qca,ar9330-eth";
> +	reg = <0x19000000 0x200>;
> +	interrupts = <4>;
> +
> +	resets = <&rst 9>, <&rst 22>;
> +	reset-names = "mac", "mdio";
> +	clocks = <&pll ATH79_CLK_AHB>, <&pll ATH79_CLK_AHB>;
> +	clock-names = "eth", "mdio";
> +
> +	phy-mode = "mii";
> +	phy-handle = <&phy_port4>;

This does not seem like a valid example. If phy_port4 is listed here,
i would expect switch_port 5 to be totally missing?

> +};
> +
> +eth1: ethernet@...00000 {
> +	compatible = "qca,ar9330-eth";
> +	reg = <0x1a000000 0x200>;
> +	interrupts = <5>;
> +	resets = <&rst 13>, <&rst 23>;
> +	reset-names = "mac", "mdio";
> +	clocks = <&pll ATH79_CLK_AHB>, <&pll ATH79_CLK_AHB>;
> +	clock-names = "eth", "mdio";
> +
> +	phy-mode = "gmii";
> +	phy-handle = <&switch_port0>;
> +
> +	fixed-link {
> +		speed = <1000>;
> +		full-duplex;
> +	};

You also cannot have both a fixed-link and a phy-handle.

> +
> +	mdio {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		switch10: switch@10 {
> +			#address-cells = <1>;
> +			#size-cells = <0>;
> +
> +			compatible = "qca,ar9331-switch";
> +			reg = <16>;

Maybe don't mix up hex and decimal? switch16: switch@16.

      Andrew