From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chen Feng Subject: [PATCH V5 RESEND 1/3] docs: iommu: Documentation for iommu in hi6220 SoC Date: Fri, 20 Nov 2015 10:25:07 +0800 Message-ID: <1447986309-47548-2-git-send-email-puck.chen@hisilicon.com> References: <1447986309-47548-1-git-send-email-puck.chen@hisilicon.com> Mime-Version: 1.0 Content-Type: text/plain Return-path: In-Reply-To: <1447986309-47548-1-git-send-email-puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org> Sender: devicetree-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org To: joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org, puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, robh+dt-DgEjT+Ai2ygdnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, mark.rutland-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org Cc: puck.chen-Dw/NWeUnuQfQT0dZR+AlfA@public.gmane.org, w.f-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, xuwei5-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, guodong.xu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, arnd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, haojian.zhuang-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org List-Id: devicetree@vger.kernel.org Documentation for hi6220 iommu driver. Signed-off-by: Chen Feng --- .../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 = ; + 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 devicetree" in the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org More majordomo info at http://vger.kernel.org/majordomo-info.html