Re: [PATCH] arm64: dts: imx8qm: add smmu node

[Robin Murphy]

On 2021-08-07 11:45, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@xxxxxxx>
>
> i.MX8QM has an iommu unit: SMMU-V2(mmu-500), add it.

Given CONFIG_ARM_SMMU_DISABLE_BYPASS_BY_DEFAULT, you may want to add 
this in a disabled state until you've filled in all the "iommus" 
properties for the client devices. Otherwise, be prepared to hear from 
people reporting issues bisected to this patch ;)

Robin.

> Signed-off-by: Peng Fan <peng.fan@xxxxxxx>
> ---
>   arch/arm64/boot/dts/freescale/imx8qm.dtsi | 16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
>
> diff --git a/arch/arm64/boot/dts/freescale/imx8qm.dtsi b/arch/arm64/boot/dts/freescale/imx8qm.dtsi
> index aebbe2b84aa1..b8ffd5be6a3e 100644
> --- a/arch/arm64/boot/dts/freescale/imx8qm.dtsi
> +++ b/arch/arm64/boot/dts/freescale/imx8qm.dtsi
> @@ -165,6 +165,22 @@ iomuxc: pinctrl {
>   
>   	};
>   
> +	smmu: iommu@51400000 {
> +		compatible = "arm,mmu-500";
> +		reg = <0 0x51400000 0 0x40000>;
> +		#iommu-cells = <2>;
> +		#global-interrupts = <1>;
> +		interrupts = <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>, <0 32 4>, <0 32 4>, <0 32 4>,
> +			     <0 32 4>;
> +	};
> +
>   	/* sorted in register address */
>   	#include "imx8-ss-img.dtsi"
>   	#include "imx8-ss-dma.dtsi"