On Wed, 26 Jun 2019 00:48:09 +0900, Arnd Bergmann wrote: > > On Tue, Jun 25, 2019 at 4:28 PM Rich Felker <dalias@xxxxxxxx> wrote: > > On Tue, Jun 25, 2019 at 02:50:01PM +0200, Arnd Bergmann wrote: > > > don't build, or are incomplete and not worked on for a long > > > time, compared to the bits that are known to work and that someone > > > is still using or at least playing with. > > > I guess a lot of the SoCs that have no board support other than > > > the Hitachi/Renesas reference platform can go away too, as any products > > > based on those boards have long stopped updating their kernels. > > > > My intent here was always, after getting device tree theoretically > > working for some reasonable subset of socs/boards, drop the rest and > > add them back as dts files (possibly plus some small drivers) only if > > there's demand/complaint about regression. > > Do you still think that this is a likely scenario for the future though? > > If nobody's actively working on the DT support for the old chips and > this is unlikely to change soon, removing the known-broken bits earlier > should at least make it easier to keep maintaining the working bits > afterwards. > > FWIW, I went through the SH2, SH2A and SH3 based boards that > are supported in the kernel and found almost all of them to > be just reference platforms, with no actual product ever merged. > IIRC the idea back then was that users would supply their > own board files as an add-on patch, but I would consider all the > ones that did to be obsolete now. > > HP Jornada 6xx is the main machine that was once supported, but > given that according to the defconfig file it only comes with 4MB > of RAM, it is unlikely to still boot any 5.x kernel, let alone user > space (wikipedia claims there were models with 16MB of RAM, > but that is still not a lot these days). > > "Magicpanel" was another product that is supported in theory, but > the google search showed the 2007 patch for the required > flash storage driver that was never merged. > > Maybe everything but J2 and SH4(a) can just get retired? > > Arnd I also have some boards, so it's possible to rewrite more. I can not rewrite the target I do not have, so I think that there is nothing but to retire. There are too many unique parts of SH and it will be difficult to maintain in the future. -- Yosinori Sato
