From mboxrd@z Thu Jan 1 00:00:00 1970 From: Rob Herring Subject: Re: [PATCH V5 RESEND 1/3] docs: iommu: Documentation for iommu in hi6220 SoC Date: Fri, 20 Nov 2015 08:21:48 -0600 Message-ID: <20151120142148.GA2448@rob-hp-laptop> References: <1447986309-47548-1-git-send-email-puck.chen@hisilicon.com> <1447986309-47548-2-git-send-email-puck.chen@hisilicon.com> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: Content-Disposition: inline In-Reply-To: <1447986309-47548-2-git-send-email-puck.chen-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org Errors-To: iommu-bounces-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org To: Chen Feng Cc: mark.rutland-5wv7dgnIgG8@public.gmane.org, devicetree-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, guodong.xu-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, pawel.moll-5wv7dgnIgG8@public.gmane.org, ijc+devicetree-KcIKpvwj1kUDXYZnReoRVg@public.gmane.org, w.f-hv44wF8Li93QT0dZR+AlfA@public.gmane.org, linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, xuwei5-C8/M+/jPZTeaMJb+Lgu22Q@public.gmane.org, iommu-cunTk1MwBs9QetFLy7KEm3xJsTq8ys+cHZ5vskTnxNA@public.gmane.org, haojian.zhuang-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org, puck.chen-Dw/NWeUnuQfQT0dZR+AlfA@public.gmane.org, arnd-QSEj5FYQhm4dnm+yROfE0A@public.gmane.org List-Id: devicetree@vger.kernel.org On Fri, Nov 20, 2015 at 10:25:07AM +0800, Chen Feng wrote: > Documentation for hi6220 iommu driver. > > Signed-off-by: Chen Feng Acked-by: Rob Herring > --- > .../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