Hello Sascha, On 30.08.22 09:32, Sascha Hauer wrote: > Hi Ahmad, > > On Thu, Aug 18, 2022 at 07:19:45AM +0200, Ahmad Fatoum wrote: >> The i.MX8MM exists in a Lite variant with no VPUs as well as Solo and >> Dual variants with one or two cores respectively instead of the default >> four. For i.MX6, we had a manual fixup taking care of deleting the >> excess CPUs, but for e.g. the i.MX8MP, we have fuses for the M7, VPUs, CAN, >> CAN-FD, ISPs, NPU, ... etc. Describing all that in the DT is overly verbose >> as we need to take care not to rely on specific device node names that >> should be disabled. There has been an upstream attempt to get a binding >> for U-Boot to act on: >> >> https://lore.kernel.org/all/20220324042024.26813-1-peng.fan@xxxxxxxxxxx/ >> >> This was refused by the DT maintainer, because any solution to this >> problem should also be flexible enough to cover the case of partitioning >> devices between the secure and normal world. >> >> There's a patch series upstream to describe a domain-controller binding >> that allows a hypervisor to partition devices into domains. With the >> naming generalized, this fits nicely the use case of gating devices >> behind specific features: >> >> https://lore.kernel.org/all/3ca7cd75-4b62-2380-adb0-646bbeb647a2@xxxxxxxxxxxxxx/ >> >> This series does that. See the first two commit messages for details. >> We use a barebox, prefix as the naming isn't set in stone, but the intention >> is to drop the prefix and potentially rename once an upstream binding is >> approved. > > I am fine with this series. Is this still the way you want to have it > merged or do you have an update? No updates, please apply series, except for last two RFC commits. I'll revise the naming once there is an upstream binding, but we can do with the barebox, prefixed binding until then. Cheers, Ahmad > > Sascha > -- Pengutronix e.K. | | Steuerwalder Str. 21 | http://www.pengutronix.de/ | 31137 Hildesheim, Germany | Phone: +49-5121-206917-0 | Amtsgericht Hildesheim, HRA 2686 | Fax: +49-5121-206917-5555 |
