Re: [PATCH TIP 02/14] x86: Add device tree support
From: Grant Likely <hidden>
Date: 2011-02-16 21:31:33
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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 <redacted> Signed-off-by: Dirk Brandewie <redacted> ---
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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.