[PATCH] ARM: dts: add initial dts file for ORIGEN4QUAD

[Tomasz Figa]

Hi Kyungmin, Kyuho,

On Monday 26 of November 2012 20:52:12 Kyungmin Park wrote:
> Hi,
> 
> On 11/26/12, chlrbgh0 at gmail.com <chlrbgh0 at gmail.com> wrote:
> > From: Kyuho Choi <kh.choi at insignal.co.kr>
> > 
> > This patch adds initial dts file for ORIGEN4QUAD board.
> > ORIGEN4QUAD board based on Samsung EXYNOS4412 SoC.
> > More properties will be added later.
> > 
> > Signed-off-by: Kyuho Choi <kh.choi at insignal.co.kr>
> > ---
> > 
> >  arch/arm/boot/dts/exynos4412-origen4quad.dts |   45
> > 
> > ++++++++++++++++++++++++++
> > 
> >  1 files changed, 45 insertions(+), 0 deletions(-)
> >  create mode 100644 arch/arm/boot/dts/exynos4412-origen4quad.dts
> > 
> > diff --git a/arch/arm/boot/dts/exynos4412-origen4quad.dts
> > b/arch/arm/boot/dts/exynos4412-origen4quad.dts
> > new file mode 100644
> > index 0000000..390a2ab
> > --- /dev/null
> > +++ b/arch/arm/boot/dts/exynos4412-origen4quad.dts
> > @@ -0,0 +1,45 @@
> > +/*
> > + * Samsung's Exynos4412 based Origen4Quad board device tree source
> > + *
> > + * Copyright (c) 2012-2013 Isnignal Co., Ltd.
> > + *		http://www.insignal.co.kr
> > + *
> > + * Device tree source file for Insignal's Origen4Quad board which is
> > based on
> > + * Samsung's Exynos4412 SoC.
> > + *
> > + * This program is free software; you can redistribute it and/or
> > modify + * it under the terms of the GNU General Public License
> > version 2 as + * published by the Free Software Foundation.
> > +*/
> > +
> > +/dts-v1/;
> > +/include/ "exynos4412.dtsi"
> > +
> > +/ {
> > +	model = "Insignal Origen4Quad board based on Exynos4412";
> > +	compatible = "insignal,origen4quad", "samsung,exynos4412";
> > +
> > +	memory {
> > +		reg = <0x40000000 0x40000000>;
> > +	};
> 
> does it test to boot with this dts file?
> does it support 1GiB memory section?

It will most likely fail to boot with u-boot versions that do not support 
replacing memory configuration in device tree and without 
CONFIG_ARM_ATAG_DTB_COMPAT enabled.

In other words, the memory setup from dts is used only if both of the 
following are true:
 - CONFIG_ARM_ATAG_DTB_COMPAT is disabled
 - u-boot does not modify memory setup in device tree passed to the kernel

Best regards,
-- 
Tomasz Figa
Samsung Poland R&D Center
SW Solution Development, Linux Platform