Re: [PATCH net-next 08/12] dt-bindings: net: toshiba,tc965x-dwmac: add TC956x Ethernet bridge

[Andrew Lunn]

> Are there other consumers of these TC956x gpios which would result in a
> board designer (and hence dts author) to ever reference this
> gpio-controller in a different way?

This Ethernet device could driver an SFP cage. Such cages typically
have a number of pins connect to GPIOs, so you can tell when there is
a module in the cage, enable the transmit laser, know if light is
entering the module from the link peer, etc.

    sfp2: sfp {
      compatible = "sff,sfp";
      i2c-bus = <&sfp_i2c>;
      los-gpios = <&cps_gpio1 28 GPIO_ACTIVE_HIGH>;
      mod-def0-gpios = <&cps_gpio1 27 GPIO_ACTIVE_LOW>;
      pinctrl-names = "default";
      pinctrl-0 = <&cps_sfpp0_pins>;
      tx-disable-gpios = <&cps_gpio1 29 GPIO_ACTIVE_HIGH>;
      tx-fault-gpios = <&cps_gpio1 26 GPIO_ACTIVE_HIGH>;
    };

	Andrew