Quoting Paul Boddie (2022-01-09 23:40:08) > On Saturday, 8 January 2022 22:49:19 CET Jonas Smedegaard wrote: > > > > Even current generation PinePhone might be made to run a (very) > > lightweight telephony-focused stack, on its embedded 32bit 300MHz > > AR100 processor. > > > > I maintain the needed compiler for Debian in package gcc-or1k-elf, > > and getting Linux compiled seems doable for someone with the skills > > (i.e. not me): https://linux-sunxi.org/AR100#Mainline_Kernel_Support > > The AR100 processor in the Allwinner SoCs appears to be used as a kind > of microcontroller without memory management unit, at least from what > I can understand from that wiki page, so running vanilla Linux would > be out of the question. But there are other things it could presumably > be asked to do.
It was my understanding that the AR100 was unusable for running Linux - until I read that wiki page, which to me seems to explicitly mention running linux on it - in the very section header, ever: > Mainline Kernel Support I am not knowledgeable in this low-level stuff though, so I take your word for it. [...] > I suppose that if it were possible to power down the main cores and > just keep the auxiliary core operating (perhaps more feasible with the > AR100 given its apparent use with power management), the aim would be > to somehow wake up the main cores in a state where they can present > the user with an interface upon some kind of telephony event. That I know for a fact is not only theoretical speculation: It is possible to fully power down the main cores and keep only the AR100 running: The reason I maintain the gcc compiler for AR100 is for Crust, a free firmware that I have succesfully used to put my Allwinner A64-based Teres I laptop to deep sleep: https://github.com/crust-firmware/crust - or Debian package crust-firmware. That codebase has some quite informative commit messages in the git source, which I imagine that someone more skilled than me can benefit from digging through to understand much more on what has already been mapped out of the AR100 functionality. - Jonas -- * Jonas Smedegaard - idealist & Internet-arkitekt * Tlf.: +45 40843136 Website: http://dr.jones.dk/ [x] quote me freely [ ] ask before reusing [ ] keep private
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