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ARM: dts: NSP: Enable SFP on bcm958625hr

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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>
This commit is contained in:
Florian Fainelli 2018-08-31 12:20:37 -07:00
parent b0465fdfdd
commit 046ead61dc
1 changed files with 26 additions and 0 deletions
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26
arch/arm/boot/dts/bcm958625hr.dts
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@ -58,6 +58,24 @@ gpio-restart {
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 @@ port@4 {
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";