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? You are correct, that this uci-config only gets applied on boot. but changing uci and calling "reload-config" will do the "magic". Sven _______________________________________________ Lede-dev mailing list Lede-dev@lists.infradead.org http://lists.infradead.org/mailman/listinfo/lede-dev
