[PATCH v2 04/22] ARM: dt: tegra30: iommu: Add "nvidia,swgroup"

[Stephen Warren]

On 07/05/2013 04:44 AM, Hiroshi Doyu wrote:
> This is a bitmap that indicates which HardWare Accelerators(HWA) are
> supported on Tegra30 SoC.

> diff --git a/arch/arm/boot/dts/tegra30.dtsi b/arch/arm/boot/dts/tegra30.dtsi

> +		nvidia,swgroup = TEGRA30_SWGROUP_ALL;

That property isn't in the binding document. We can't add properties
that aren't documented.

Macros should not include structural syntax; the < > around the cell
value is part of the macro the way you've written it, but shouldn't be.
It'd be simpler to just write:

	nvidia,swgroup = <0x00000000 0x000779ff>;

We should only extend the binding in a backwards-compatible fashion, so
we can't require that DTs contain this value. At least, there should be
a default value defined for when the property doesn't exist.