On Wednesday, July 09, 2014 at 05:37:58 AM, Simon Glass wrote: > Driver model currently only operates after relocation is complete. In this > state U-Boot typically has a small amount of memory available. In adding > support for driver model prior to relocation we must try to use as little > memory as possible. > > In addition, on some machines the memory has not be inited and/or the CPU > is not running at full speed or the data cache is off. These can reduce > execution performance, so the less initialisation that is done before > relocation the better. > > An immediately-obvious improvement is to only initialise drivers which are > actually going to be used before relocation. On many boards the only such > driver is a serial UART, so this provides a very large potential benefit. > > Allow drivers to mark themselves as 'pre-reloc' which means that they will > be initialised prior to relocation. This can be done either with a driver > flag or with a 'dm,pre-reloc' device tree property.
I think we should start marking those DT props something like 'u-boot,dm-pre- reloc' instead . The same way as Linux marks it's own linux-specific DT props. [...] Best regards, Marek Vasut _______________________________________________ U-Boot mailing list U-Boot@lists.denx.de http://lists.denx.de/mailman/listinfo/u-boot
