Date: Fri, 20 Nov 2015 08:21:48 -0600
From: Rob Herring <robh@kernel.org>
To: Chen Feng <puck.chen@hisilicon.com>
Cc: joro@8bytes.org, iommu@lists.linux-foundation.org,
        linux-kernel@vger.kernel.org, pawel.moll@arm.com, mark.rutland@arm.com,
        ijc+devicetree@hellion.org.uk, devicetree@vger.kernel.org,
        puck.chen@aliyun.com, w.f@huawei.com, xuwei5@hisilicon.com,
        guodong.xu@linaro.org, arnd@linaro.org, haojian.zhuang@linaro.org
Subject: Re: [PATCH V5 RESEND 1/3] docs: iommu: Documentation for iommu in
 hi6220 SoC
Message-ID: <20151120142148.GA2448@rob-hp-laptop>
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 <1447986309-47548-2-git-send-email-puck.chen@hisilicon.com>
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On Fri, Nov 20, 2015 at 10:25:07AM +0800, Chen Feng wrote:
> Documentation for hi6220 iommu driver.
> 
> Signed-off-by: Chen Feng <puck.chen@hisilicon.com>

Acked-by: Rob Herring <robh@kernel.org>

> ---
>  .../bindings/iommu/hisi,hi6220-iommu.txt           | 32 ++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt
> 
> diff --git a/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt
> new file mode 100644
> index 0000000..44f9101
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt
> @@ -0,0 +1,32 @@
> +Hi6220 SoC SMMU Device Driver devicetree document
> +The media system shared the same smmu IP to access DDR memory. And all
> +media IP used the same page table.
> +
> +Below binding describes the system mmu for media system in hi6220 platform
> +
> +Required properties:
> +- compatible: should contain "hisilicon,hi6220-smmu".
> +- reg: A tuple of base address and size of System MMU registers.
> +- clocks: a list of phandle + clock-specifier pairs, one for each entry
> +  in clock-names.
> +- clock-names: should contain:
> +  * "smmu"
> +  * "media-sc"
> +  * "smmu-peri"
> +- interrupts: An interrupt specifier for interrupt signal of System MMU.
> +- #iommu-cells: The iommu-cells should be 0. Because no additional information
> +  needs to be encoded in the specifier.
> +
> +Examples:
> +	iommu@f4210000 {
> +		compatible = "hisilicon,hi6220-smmu";
> +		reg = <0x0 0xf4210000 0x0 0x1000>;
> +		interrupts = <GIC_SPI 113 IRQ_TYPE_LEVEL_HIGH>;
> +		clocks = <&sys_ctrl HI6220_MMU_CLK>,
> +		         <&media_ctrl HI6220_MED_MMU>,
> +		         <&sys_ctrl HI6220_MEDIA_PLL_SRC>;
> +		clock-names = "smmu",
> +			      "media-sc",
> +			      "smmu-peri";
> +		#iommu-cells = <0>;
> +	};
> -- 
> 1.9.1
> 
> --
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