Hi,
On Wed, Jun 8, 2016 at 10:26 PM, Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx> wrote:
> An virtual iommu without reg or interrupts for display.
> Adding this according to iommu driver changes.
>
> Signed-off-by: Shunqian Zheng <zhengsq@xxxxxxxxxxxxxx>
> ---
> arch/arm/boot/dts/rk3288.dtsi | 6 ++++++
> 1 file changed, 6 insertions(+)
>
> diff --git a/arch/arm/boot/dts/rk3288.dtsi b/arch/arm/boot/dts/rk3288.dtsi
> index 7fa932f..4cd535f 100644
> --- a/arch/arm/boot/dts/rk3288.dtsi
> +++ b/arch/arm/boot/dts/rk3288.dtsi
> @@ -219,9 +219,15 @@
> clock-names = "timer", "pclk";
> };
>
> + display_mmu: virtual-iommu {
> + compatible = "rockchip,iommu";
> + #iommu-cells = <0>;
> + };
> +
Device tree should describe real hardware and so it isn't really a
good idea to add such virtual iommu, especially using a compatible
string of a real device.
Please see my comments to patch 3/7 for an alternative idea.
Best regards,
Tomasz
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