On Tue, Apr 24, 2018 at 12:30 PM, Bartosz Golaszewski <b...@bgdev.pl> wrote: > From: Bartosz Golaszewski <bgolaszew...@baylibre.com> > > Device tree based systems often use OF_DECLARE() macros for devices > that need to be initialized early in the boot process such as clocks, > timers etc. However platform devices are more desirable.
Yes, platform devices would be more desirable, but ... > > This series aims at introducing support for early platform drivers for > OF-based systems. ... the whole early_platform_device infrastructure is not really a platform_device. Rather it kind of looks like one and I guess gets converted over during boot. This is not the first attempt to add DT support to early platform devices[1]. I think the same objections still apply. It has been pretty much only an SH thing (which as an arch, I'm told is pretty much unmaintained and broken). > The idea is to have a special compatible fallback string: "earlydev" > that similarily to "syscon" would be added to device nodes that need > early probing. We then need to call of_early_platform_populate() early > in the boot process to actually probe the registered devices. Others have sufficiently explained why this won't fly for DT, so I don't have more to add. Rob [1] http://lists.infradead.org/pipermail/linux-arm-kernel/2011-June/054529.html
