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: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Ray Jui <ray.jui@broadcom.com>

diff --git a/arch/arm/boot/dts/bcm958625hr.dts b/arch/arm/boot/dts/bcm958625hr.dts
index ea3fc194f8f37ea4bea411922372eac32e82852e..a53a2f629d74198a5c3f4e5d27f0ba5954c0950a 100644 (file)
--- a/arch/arm/boot/dts/bcm958625hr.dts
+++ b/arch/arm/boot/dts/bcm958625hr.dts
@@ -58,6 +58,24 @@
                open-source;
                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 {
@@ -210,6 +228,14 @@
                        reg = <4>;
                };
 
+               port@5 {
+                       label = "sfp";
+                       phy-mode = "sgmii";
+                       reg = <5>;
+                       sfp = <&sfp>;
+                       managed = "in-band-status";
+               };
+
                port@8 {
                        ethernet = <&amac2>;
                        label = "cpu";