[PATCH TIP 02/14] x86: Add device tree support

[Grant Likely]

On Mon, Jan 24, 2011 at 10:04:27AM +0530, Sebastian Andrzej Siewior wrote:
> * Sebastian Andrzej Siewior | 2011-01-24 09:58:50 [+0530]:
> 
> >This patch adds minimal support for device tree support on x86. It will
> >be passed to the kernel via setup_data which requires atleast boot
> >protocol 2.09.
> >Memory size, restricted memory regions, boot arguments are gathered the
> >traditional way so things like cmd_line are just here to let the code
> >compile.
> >The current plan is use the device tree as an extension and to gather
> >informations from it which can not be enumerated and have to be
> >hardcoded otherwise. This includes things like
> >- which devices are on this I2C/ SPI bus?
> >- how are the interrupts wired to IO APIC?
> >- where could my hpet be?
> >
> 
> Andres, this patch moves some of the OF defines you added for OLPC from
> irq.c to prom.c which requires CONFIG_X86_OF to be enabled. A later

Why not simply make prom.c depend on CONFIG_OF?  There is no need to
have an x86 specific config value for enabling devicetree code.

> patch changes irq_create_of_mapping() from returning intspec[0] to
> actually doing something. Could you please check how of OLPC gets broken
> and what we could do about it? :)
> 
> Sebastian
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