netdev - Re: [PATCH 1/3] net: dsa: Add DT bindings for Vitesse VSC73xx switches

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Message-ID: <680f6108-2e3e-5c6b-522e-2c2c5709dbb8@gmail.com>
Date:   Thu, 14 Jun 2018 09:09:27 -0700
From:   Florian Fainelli <f.fainelli@...il.com>
To:     Linus Walleij <linus.walleij@...aro.org>,
        Andrew Lunn <andrew@...n.ch>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>
Cc:     netdev@...r.kernel.org, openwrt-devel@...ts.openwrt.org,
        LEDE Development List <lede-dev@...ts.infradead.org>,
        Gabor Juhos <juhosg@...nwrt.org>, devicetree@...r.kernel.org
Subject: Re: [PATCH 1/3] net: dsa: Add DT bindings for Vitesse VSC73xx
 switches



On 06/14/2018 05:35 AM, Linus Walleij wrote:
> This adds the device tree bindings for the Vitesse VSC73xx
> switches. We also add the vendor name for Vitesse.
> 
> Cc: devicetree@...r.kernel.org
> Signed-off-by: Linus Walleij <linus.walleij@...aro.org>
> ---
>  .../bindings/net/dsa/vitesse,vsc73xx.txt      | 81 +++++++++++++++++++
>  .../devicetree/bindings/vendor-prefixes.txt   |  1 +
>  2 files changed, 82 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt
> 
> diff --git a/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt b/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt
> new file mode 100644
> index 000000000000..474cdba5fa37
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/net/dsa/vitesse,vsc73xx.txt
> @@ -0,0 +1,81 @@
> +Vitess VSC73xx Switches
> +=======================
> +
> +This defines device tree bindings for the Vitesse VSC73xx switch chips.
> +The Vitesse company has been acquired by Microsemi and Microsemi in turn
> +acquired by Microchip but retains this vendor branding.
> +
> +The currently supported switch chips are:
> +Vitesse VSC7385 SparX-G5 5+1-port Integrated Gigabit Ethernet Switch
> +Vitesse VSC7388 SparX-G8 8-port Integrated Gigabit Ethernet Switch
> +Vitesse VSC7395 SparX-G5e 5+1-port Integrated Gigabit Ethernet Switch
> +Vitesse VSC7398 SparX-G8e 8-port Integrated Gigabit Ethernet Switch
> +
> +The device tree node is an SPI device so it must reside inside a SPI bus
> +device tree node, see spi/spi-bus.txt
> +
> +Required properties:
> +
> +- compatible: must be exactly one of:
> +	"vitesse,vsc7385"
> +	"vitesse,vsc7388"
> +	"vitesse,vsc7395"
> +	"vitesse,vsc7398"
> +- gpio-controller: indicates that this switch is also a GPIO controller,
> +  see gpio/

Missing reference here?

> +- #gpio-cells: this must be set to <2> and indicates that we are a twocell
> +  GPIO controller.

Should you also reference the standard binding here to interpret what
those two cells mean?

Other than that:

Reviewed-by: Florian Fainelli <f.fainelli@...il.com>

> +
> +Optional properties:
> +
> +- reset-gpios: a handle to a GPIO line that can issue reset of the chip.
> +  It should be tagged as active low.
> +
> +Required subnodes:
> +
> +See net/dsa/dsa.txt for a list of additional required and optional properties
> +and subnodes of DSA switches.
> +
> +Examples:
> +
> +switch@0 {
> +	compatible = "vitesse,vsc7395";
> +	reg = <0>;
> +	/* Specified for 2.5 MHz or below */
> +	spi-max-frequency = <2500000>;
> +	gpio-controller;
> +	#gpio-cells = <2>;
> +
> +	ports {
> +		#address-cells = <1>;
> +		#size-cells = <0>;
> +
> +		port@0 {
> +			reg = <0>;
> +			label = "lan1";
> +		};
> +		port@1 {
> +			reg = <1>;
> +			label = "lan2";
> +		};
> +		port@2 {
> +			reg = <2>;
> +			label = "lan3";
> +		};
> +		port@3 {
> +			reg = <3>;
> +			label = "lan4";
> +		};
> +		vsc: port@6 {
> +			reg = <6>;
> +			label = "cpu";
> +			ethernet = <&gmac1>;
> +			phy-mode = "rgmii";
> +			fixed-link {
> +				speed = <1000>;
> +				full-duplex;
> +				pause;
> +			};
> +		};
> +	};
> +};
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.txt b/Documentation/devicetree/bindings/vendor-prefixes.txt
> index b5f978a4cac6..e8473894700c 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.txt
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.txt
> @@ -385,6 +385,7 @@ v3	V3 Semiconductor
>  variscite	Variscite Ltd.
>  via	VIA Technologies, Inc.
>  virtio	Virtual I/O Device Specification, developed by the OASIS consortium
> +vitesse	Vitesse Semiconductor Corporation
>  vivante	Vivante Corporation
>  vocore VoCore Studio
>  voipac	Voipac Technologies s.r.o.
> 

-- 
Florian