Hi Bin, On Sat, 8 Feb 2020 at 08:54, Bin Meng <bmeng...@gmail.com> wrote: > > Hi Simon, > > On Sat, Feb 8, 2020 at 11:51 PM Simon Glass <s...@chromium.org> wrote: > > > > Hi Bin, > > > > On Sat, 8 Feb 2020 at 08:15, Bin Meng <bmeng...@gmail.com> wrote: > > > > > > Hi Simon, > > > > > > On Mon, Jan 27, 2020 at 1:08 PM Simon Glass <s...@chromium.org> wrote: > > > > > > > > Add a means to avoid configuring a device when needed. Add an > > > > explanation > > > > of why this is useful to the binding file. > > > > > > > > > > Does disabling CONFIG_PCI_PNP not help? > > > > That is for all devices. Here we just want the UART to stay where it > > is so that we can debug serial drivers, FSP-S, etc. If the UART moves > > then any output after that hangs the machine until we reinit the > > serial driver. > > OK, I think this is for debugging purpose, right? As you must have get > Coral boot for some time, and this is only for retaining the console > debug output?
Sort-of, but I've actually left it enabled. The problem is that if you get an error or any debug output very early after relocation in U-Boot, it hangs. I feel it is quite confusing for people to add a bit of debugging and have it crash. Admittedly there is a very small window where this happens (roughly between arch_fsp_init_r() returning and initr_serial() being called. But i found it pretty annoying. What do you think? Also I'd like to change it to suppress console output when it is not allowed (and print a warning later), but haven't tried that yet. > > Reviewed-by: Bin Meng <bmeng...@gmail.com> > > Regards, > Bin
