From mboxrd@z Thu Jan 1 00:00:00 1970 From: Grant Likely Subject: Re: [PATCH TIP 02/14] x86: Add device tree support Date: Wed, 16 Feb 2011 14:31:26 -0700 Message-ID: <20110216213126.GC22837@angua.secretlab.ca> References: <1295843342-1122-1-git-send-email-bigeasy@linutronix.de> <1295843342-1122-3-git-send-email-bigeasy@linutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1295843342-1122-3-git-send-email-bigeasy-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org Errors-To: devicetree-discuss-bounces+gldd-devicetree-discuss=m.gmane.org-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org To: Sebastian Andrzej Siewior Cc: sodaville-hfZtesqFncYOwBW4kG4KsQ@public.gmane.org, devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org, x86-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-Id: devicetree@vger.kernel.org On Mon, Jan 24, 2011 at 09:58:50AM +0530, Sebastian Andrzej Siewior wrote: > 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? > > Cc: devicetree-discuss-uLR06cmDAlY/bJ5BZ2RsiQ@public.gmane.org > Signed-off-by: Sebastian Andrzej Siewior > Signed-off-by: Dirk Brandewie > --- [...] > diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig > index d5ed94d..5d21095 100644 > --- a/arch/x86/Kconfig > +++ b/arch/x86/Kconfig > @@ -297,6 +297,13 @@ config X86_BIGSMP > ---help--- > This option is needed for the systems that have more than 8 CPUs > > +config X86_OF > + bool "Support for device tree" > + select OF > + select OF_EARLY_FLATTREE > + ---help--- > + Device tree support on X86. > + On ARM and MIPS, this is called 'config USE_OF'. It would be nice to have some commonality. Maybe I should move the user-visible option to drivers/of/Kconfig. Or perhaps I should just make CONFIG_OF itself user visible. thoughts? g.