From: Chen Feng <puck.chen@hisilicon.com>
To: <joro@8bytes.org>, <iommu@lists.linux-foundation.org>,
<linux-kernel@vger.kernel.org>, <robh+dt@kernel.org>,
<pawel.moll@arm.com>, <mark.rutland@arm.com>,
<ijc+devicetree@hellion.org.uk>, <galak@codeaurora.org>,
<puck.chen@hisilicon.com>, <yudongbin@hisilicon.com>,
<saberlily.xia@hisilicon.com>, <suzhuangluan@hisilicon.com>,
<kong.kongxinwei@hisilicon.com>, <xuyiping@hisilicon.com>,
<z.liuxinliang@hisilicon.com>, <puck.chen@aliyun.com>,
<weidong2@hisilicon.com>, <w.f@huawei.com>
Cc: <qijiwen@hisilicon.com>, <peter.panshilin@hisilicon.com>,
<dan.zhao@hisilicon.com>, <linuxarm@huawei.com>
Subject: [PATCH V3 RESEND 1/3] bindings for hisilicon hi6220 iommu driver
Date: Tue, 27 Oct 2015 15:16:19 +0800 [thread overview]
Message-ID: <1445930181-71565-1-git-send-email-puck.chen@hisilicon.com> (raw)
docs: iommu: Documentation for iommu in hi6220 SoC.
Signed-off-by: Chen Feng <puck.chen@hisilicon.com>
Signed-off-by: Yu Dongbin <yudongbin@hisilicon.com>
---
.../bindings/iommu/hisi,hi6220-iommu.txt | 56 ++++++++++++++++++++++
1 file changed, 56 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..756e64f
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/hisi,hi6220-iommu.txt
@@ -0,0 +1,56 @@
+Hi6220 SoC SMMU Device Driver devicetree document
+=======================================================================
+The Architecture of SMMU on Hi6220 SoC:
+
+ +------------------------------------------------------------------+
+ | |
+ | +---------+ +--------+ +-------------+ +-------+ |
+ | | ADE | | ISP | | V/J codec | | G3D | |
+ | +----|----+ +---|----+ +------|------+ +---|---| |
+ | | | | | |
+ | ---------v-----------v--------------v--------------v----- |
+ | Media Bus |
+ | --------------------------------|---------------|-------- |
+ | | | |
+ | +---v---------------v--------+ |
+ | | SMMU | |
+ | +----------|---------|-------+ |
+ | | | |
+ +--------------------------------------------|---------|-----------+
+ | |
+ +------------v---------v-----------+
+ | DDRC |
+ +----------------------------------+
+
+Note:
+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
next reply other threads:[~2015-10-27 7:17 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-10-27 7:16 Chen Feng [this message]
2015-10-27 7:16 ` [PATCH V3 RESEND 2/3] Add iommu driver for hi6220 SoC platform Chen Feng
2015-10-27 7:16 ` [PATCH V3 RESEND 3/3] Add iommu node " Chen Feng
2015-10-27 17:39 ` kbuild test robot
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