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Commit 046ead61 authored by Florian Fainelli's avatar Florian Fainelli
Browse files

ARM: dts: NSP: Enable SFP on bcm958625hr 



Enable the SFP connected to port 5 of the switch and wire up all GPIOs
to the SFP cage. Because of a hardware limitation of the i2c controller
on the iProc SoCs which prevents large i2c (> 63 bytes) transactions to
work, we use the i2c-gpio interface instead, which does not have that
limitation. This allows us to read the SFP module EEPROM, which would
not be possible otherwise since it exceeds that size during a single
read transfer.

Signed-off-by: default avatarFlorian Fainelli <f.fainelli@gmail.com>
Reviewed-by: default avatarRay Jui <ray.jui@broadcom.com>
parent b0465fdf

arch/arm/boot/dts/bcm958625hr.dts

+26 −0
Original line number Original line Diff line number Diff line
@@ -58,6 +58,24 @@ 
		open-source;

		open-source;

		priority = <200>;

		priority = <200>;

	};

	};



	/* Hardware I2C block cannot do more than 63 bytes per transfer,

	 * which would prevent reading from a SFP's EEPROM (256 byte).

	 */

	i2c1: i2c {

		compatible = "i2c-gpio";

		sda-gpios = <&gpioa 5 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

		scl-gpios = <&gpioa 4 (GPIO_ACTIVE_HIGH | GPIO_OPEN_DRAIN)>;

	};



	sfp: sfp {

		compatible = "sff,sfp";

		i2c-bus = <&i2c1>;

		mod-def0-gpios = <&gpioa 28 GPIO_ACTIVE_LOW>;

		los-gpios = <&gpioa 24 GPIO_ACTIVE_HIGH>;

		tx-fault-gpios = <&gpioa 30 GPIO_ACTIVE_HIGH>;

		tx-disable-gpios = <&gpioa 26 GPIO_ACTIVE_HIGH>;

	};

};

};





&amac0 {

&amac0 {
@@ -210,6 +228,14 @@ 
			reg = <4>;

			reg = <4>;

		};

		};





		port@5 {

			label = "sfp";

			phy-mode = "sgmii";

			reg = <5>;

			sfp = <&sfp>;

			managed = "in-band-status";

		};



		port@8 {

		port@8 {

			ethernet = <&amac2>;

			ethernet = <&amac2>;

			label = "cpu";

			label = "cpu";