13.05.2017 20:09, Sven Roederer:
On Montag, 8. Mai 2017 08:23:50 CEST Mathias Kresin wrote:
07.05.2017 23:24, Sven Roederer:
On Sonntag, 7. Mai 2017 12:25:39 CEST you wrote:
Just an opinion: being able to disable/enable PoE for each port is really
useful when you want to remotely reboot a device plugged into your PoE
switch/router. Most PoE-capable devices expose this option with the
stock
firmware.
Does your approach with the gpio-export node allow to change the state of
the GPIO at runtime? (i.e. probably from userspace)
Baptiste,
right, that's the point I'm also looking for. To have da clean way of
controlling the state of the PoE-voltage (24V passive PoE) for the ports.
As it's passive PoE there might be a big risk that having the power
enabled
all the time might cause some problems.
When defining in dts I don't see them in uci or even in /sys/class/gpio.
So via "board.d/03_gpio_switches" seems the best way to bring them to
userspace for user-interaction.
If you use the gpio-export node in the device tree source file, the gpio
pin should appear at /sys/class/gpio/. Most likely you have done
something wrong. Could it be that you used exactly the same gpio pin
number as you have it in your 03_gpio_export file? You need to decrement
the gpio pin number by the gpio base as it is done for all gpios in the dts.
Correct me if I'm wrong, but as far I can see (and confirmed by testing
it) the exported gpio in UCI doesn't have any benefit for your restart
usecase. If I change the gpio value via uci and restart
/etc/init.d/system the gpio value is still the same. Means, the value is
only set during the actual export (on boot).
Mathias
Mathias,
for the "gpio in dts" I used this branch
https://github.com/SvenRoederer/lede-project-source/commits/ERX-SFP_gpio-in-dts --> see
the last 2 commits. Code
only changed for ERX for this test.
Did I miss something?
Yes you did. The gpio-export,output value is wrong. It has to be either
0 or 1, similar to the values set for the gpio_switch config in
/e/c/system.
To make it as easy as possible for people to help, please paste your
patch next time into the e-mail body of your reply.
You are correct, that this uci-config only gets applied on boot. but changing
uci and calling "reload-config" will do the "magic".
Oh indeed, reload_config does the job. I wasn't aware of this little helper.
As I already wrote the last time, I'll leave it up to you to add what
you are the opinion is the best for the use case. I just wanted to
ensure that is wasn't added because of lack of knowledge about the
alternatives.
Mathias
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