<![CDATA[/dev/mem not exist and fast-gpio not work]]>I upgraded firmware, fast-gpio gives segmentation fault.
Also power-down not work because use fast-gpio.
Please fix firmware and release patch.

Thanks

]]>http://community.onion.io/topic/1651/dev-mem-not-exist-and-fast-gpio-not-workRSS for NodeSat, 14 Mar 2026 19:01:17 GMTFri, 10 Feb 2017 18:09:13 GMT60<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 18:09:13 GMT]]>I upgraded firmware, fast-gpio gives segmentation fault.
Also power-down not work because use fast-gpio.
Please fix firmware and release patch.

Thanks

]]>http://community.onion.io/post/10909http://community.onion.io/post/10909Fri, 10 Feb 2017 18:09:13 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 18:13:09 GMT]]>@Giovanni-Gentile said in /dev/mem not exist and fast-gpio not work:

I upgraded firmware, fast-gpio gives segmentation fault.

This is a well known issue already reported in a number of threads

Also power-down not work because use fast-gpio.

No, that is unrelated. There is no actual powerdown capability, however a previous manifestation of a design bug used to sort of accomplish a halt to meaningful software execution, that from a user perspective looked a bit like an off state.

]]>http://community.onion.io/post/10910http://community.onion.io/post/10910Fri, 10 Feb 2017 18:13:09 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 21:19:45 GMT]]>You would think powering down would be useful with a small portable device like an Omega.

]]>http://community.onion.io/post/10929http://community.onion.io/post/10929Fri, 10 Feb 2017 21:19:45 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 21:35:49 GMT]]>@Costas-Costas It's not an Omega-specific thing, it's a more general thing stemming from the SoC being a consumer-level router-SoC -- I have several different kinds of routers and they all behave this same way, with all of them rebooting, instead of shutting down. These SoCs rarely have any power-management features, other than turning internal peripherals on or off, and thus you'd have to build a more complicated power-delivery system that provides external power-down features and you'd need to then provide a way for the SoC to also communicate with this power-delivery system -- rarely worth the effort and added complexity, all things considered.

]]>http://community.onion.io/post/10930http://community.onion.io/post/10930Fri, 10 Feb 2017 21:35:49 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 21:39:23 GMT]]>@Chris-Stratton said in /dev/mem not exist and fast-gpio not work:

No, that is unrelated. There is no actual powerdown capability, however a previous manifestation of a design bug used to sort of accomplish a halt to meaningful software execution, that from a user perspective looked a bit like an off state.

I assume it hasn't been done, because the SoC wouldn't actually be off. It'd still be running, it'd just be stuck in a never-ending for-loop and it would be terribly misleading and an ugly solution. But then again, I ain't a kernel-dev and I am just making an educated guess on their motives.

]]>http://community.onion.io/post/10931http://community.onion.io/post/10931Fri, 10 Feb 2017 21:39:23 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 21:40:31 GMT]]>@WereCatf sorry I thought the Omega was a portable computer from the details on the Kickstarter campaign.

Most routers don't have SD cards attached, although some do have USB data ports.

Onion should at least write a routine to make it as safe as possible to "pull the plug" with SD cards and USB's in situ.

]]>http://community.onion.io/post/10932http://community.onion.io/post/10932Fri, 10 Feb 2017 21:40:31 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 21:43:59 GMT]]>@Costas-Costas said in /dev/mem not exist and fast-gpio not work:

Most routers don't have SD cards attached, although some do have USB data ports.

The fact that there is no SD-card slot doesn't mean the SoC wouldn't support SD-cards, though. I haven't even heard of a single router-SoC from the last decade or so that didn't support such. It's just a matter of the router-manufacturers deeming that there's little demand for including an SD-card slot, when most consumers are more likely to want to plug in USB-devices.

]]>http://community.onion.io/post/10933http://community.onion.io/post/10933Fri, 10 Feb 2017 21:43:59 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 22:23:03 GMT]]>@WereCatf I think you are missing the point, again.

If router manufacturers had added SD card's they would have a "power down" routine, ergo Onion to provide the same.

]]>http://community.onion.io/post/10935http://community.onion.io/post/10935Fri, 10 Feb 2017 22:23:03 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 22:43:52 GMT]]>Power down isn't going to happen.

sync();
unmount_everything()
printk("it's safe to turn off now"); 
set_leds(ALL_OFF);
while(1);

Might, and would presumably be useful for those using delicate filesystems.

This is after all what resetting the Omega 2+ in ignorance of the flash address mode bug used to effectively do.

]]>http://community.onion.io/post/10939http://community.onion.io/post/10939Fri, 10 Feb 2017 22:43:52 GMT<![CDATA[Reply to /dev/mem not exist and fast-gpio not work on Fri, 10 Feb 2017 22:50:57 GMT]]>@Chris-Stratton so Onion just need to tidy that up and compile as power-down, right?

]]>http://community.onion.io/post/10940http://community.onion.io/post/10940Fri, 10 Feb 2017 22:50:57 GMT