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Date: Fri, 20 Nov 2015 10:25:07 +0800 From: Chen Feng <puck.chen@...ilicon.com> To: <joro@...tes.org>, <puck.chen@...ilicon.com>, <iommu@...ts.linux-foundation.org>, <linux-kernel@...r.kernel.org>, <robh+dt@...nel.org>, <pawel.moll@....com>, <mark.rutland@....com>, <ijc+devicetree@...lion.org.uk>, <devicetree@...r.kernel.org> CC: <puck.chen@...yun.com>, <w.f@...wei.com>, <xuwei5@...ilicon.com>, <guodong.xu@...aro.org>, <arnd@...aro.org>, <haojian.zhuang@...aro.org> Subject: [PATCH V5 RESEND 1/3] docs: iommu: Documentation for iommu in hi6220 SoC Documentation for hi6220 iommu driver. Signed-off-by: Chen Feng <puck.chen@...ilicon.com> --- .../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@...10000 { + 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 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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