Hy
I use a sfp gpon onu brand fs.
I can access by ssh into the module sfp.
But i need to plug fiber with signal.
I would like to access without beeing obliged to plug fiber.
I began by modifying the DTS :
sfp1: sfp-1 {
compatible = "sff,sfp";
i2c-bus = <&i2c_sfp1>;
los-gpios = <&pio 46 GPIO_ACTIVE_HIGH>;
mod-def0-gpios = <&pio 49 GPIO_ACTIVE_LOW>;
tx-disable-gpios = <&pio 20 GPIO_ACTIVE_HIGH>;
tx-fault-gpios = <&pio 7 GPIO_ACTIVE_HIGH>;
maximum-power-milliwatt = <3000>;
};
los-gpios = <&pio 46 GPIO_ACTIVE_HIGH> ====> <&pio 46 GPIO_ACTIVE_LOW>
It works.
But when i plug the fiber, i lost the connexion ssh.
Is it possible to bypass or block the los gpios to low?
Or any ideas
frank-w
October 13, 2023, 2:58pm
2
you could add an dt overlay which you can load when config is needed without fiber connected and leave it when not
1 Like
ericwoud
October 13, 2023, 3:32pm
3
Choose a gpio pin on the gpio header and set/clear it with a jumper …
1 Like
Hy.
Thank you to answer me
I think the problem will stay.
if i keep the original number gpio, when i insert a fiber with signal, the state of the gpio change.
Hy,
i tried to select a pin from the gpio header for each
And change the pin in the DTS.
but no jumper on the header.
For example : los-gpios = <&pio 8 GPIO_ACTIVE_LOW> .
Sometine, the sfp lan works but not the sfp wan.
Another time, it’s the sfp wan it works and not the sfp lan.
I will try with all free pins
frank-w
October 14, 2023, 6:05am
6
Yes that is the purpose of the los gpio,it indicates loss of signal…if there is a los signal the interface goes down.
So los needs to be off to get interface itself working.
i change the pin for the gpio los :
sfp1: sfp-1 {
compatible = "sff,sfp";
i2c-bus = <&i2c_sfp1>;
- los-gpios = <&pio 46 GPIO_ACTIVE_HIGH>;
+ los-gpios = <&pio 8 GPIO_ACTIVE_HIGH>;
mod-def0-gpios = <&pio 49 GPIO_ACTIVE_LOW>;
tx-disable-gpios = <&pio 20 GPIO_ACTIVE_HIGH>;
tx-fault-gpios = <&pio 7 GPIO_ACTIVE_HIGH>;
@@ -126,7 +126,7 @@
sfp2: sfp-2 {
compatible = "sff,sfp";
i2c-bus = <&i2c_sfp2>;
- los-gpios = <&pio 31 GPIO_ACTIVE_HIGH>;
+ los-gpios = <&pio 63 GPIO_ACTIVE_HIGH>;
mod-def0-gpios = <&pio 47 GPIO_ACTIVE_LOW>;
tx-disable-gpios = <&pio 15 GPIO_ACTIVE_HIGH>;
tx-fault-gpios = <&pio 48 GPIO_ACTIVE_HIGH>;
It seems to work.
I continue to test and see in the long term
frank-w
October 15, 2023, 3:47pm
8
have you tried simply disable the los-gpios (commenting out via //)? or adding a quirk for ignoring the los gpio…but then of course the tx is always enabled which is not the best way…but mapping los-gpio to another gpio not associated with the sfp results in same wrong behaviour
1 Like
Hy.
I tried to comment the los gpios line, but it wasn’t good
I change to use gpio pin free i won’t use and it works.
I will see in long term if everything go on working.
Thank you again
