Hi Peter, Greg On Wednesday 12 August 2015 09:21 PM, Noam Camus wrote: >> From: Peter Hurley [mailto:[email protected]] >> Sent: Wednesday, August 12, 2015 4:17 PM >> I think Greg's question about the simulator still applies: why upstream this? >> The simulator is not even identified so how is someone supposed to know this >> workaround applies? >> The fact there are no in-tree DT users of this workaround argues against its >> acceptance. > I am using UART peripheral for Synopsys simulator same as one used by > arch/arc/plat-sim
The osci virtual platform uses nSIM with SystemC based peripheral models. The issue is in that model and not in nsim per-se. > I know this platform do not use CONFIG_SERIAL_8250_DW due to some problem I > suspect it is relate to the loop test. Indeed. If you look at git log of osci platform, there was a commit which switched DT from dw uart driver to stock 8250. Unfortunately the changelog doesn't describe in detail what the root cause was. 2013-05-16 6eda477b3c54 ARC: [nsimosci] Change .dts to use generic 8250 UART > Maybe Vineet Gupta or Alexey Brodkin from Synopsys which are CC here can > comment. > > So It just happen for me to be a pioneer with this. > > More than that "no-loopback-test" is an option already exist for core 8250, > and since DW is only an extension for this driver it should also benefit from > this option. It seems Noam has made some changes to model today and we might need this patch after all. Noam ? > If all this is yet not enough, should I re-send this "patch set" again > without this specific patch? > > Regards, > Noam Camus > -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
