From: Chunyan Zhang <zhang.lyra@gmail.com>
To: Joerg Roedel <joro@8bytes.org>, Rob Herring <robh+dt@kernel.org>
Cc: Robin Murphy <robin.murphy@arm.com>,
Randy Dunlap <rdunlap@infradead.org>,
iommu@lists.linux-foundation.org, devicetree@vger.kernel.org,
Baolin Wang <baolin.wang7@gmail.com>,
linux-kernel@vger.kernel.org, Orson Zhai <orsonzhai@gmail.com>,
Chunyan Zhang <zhang.lyra@gmail.com>,
Sheng Xu <sheng.xu@unisoc.com>,
Kevin Tang <kevin.tang@unisoc.com>,
Chunyan Zhang <chunyan.zhang@unisoc.com>
Subject: [PATCH v5 1/2] dt-bindings: iommu: add bindings for sprd IOMMU
Date: Fri, 5 Mar 2021 17:32:15 +0800 [thread overview]
Message-ID: <20210305093216.201897-2-zhang.lyra@gmail.com> (raw)
In-Reply-To: <20210305093216.201897-1-zhang.lyra@gmail.com>
From: Chunyan Zhang <chunyan.zhang@unisoc.com>
This IOMMU module can be used by Unisoc's multimedia devices, such as
display, Image codec(jpeg) and a few signal processors, including
VSP(video), GSP(graphic), ISP(image), and CPP(camera pixel processor), etc.
Signed-off-by: Chunyan Zhang <chunyan.zhang@unisoc.com>
---
.../devicetree/bindings/iommu/sprd,iommu.yaml | 57 +++++++++++++++++++
1 file changed, 57 insertions(+)
create mode 100644 Documentation/devicetree/bindings/iommu/sprd,iommu.yaml
diff --git a/Documentation/devicetree/bindings/iommu/sprd,iommu.yaml b/Documentation/devicetree/bindings/iommu/sprd,iommu.yaml
new file mode 100644
index 000000000000..7003e12f55f9
--- /dev/null
+++ b/Documentation/devicetree/bindings/iommu/sprd,iommu.yaml
@@ -0,0 +1,57 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright 2020 Unisoc Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/iommu/sprd,iommu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc IOMMU and Multi-media MMU
+
+maintainers:
+ - Chunyan Zhang <zhang.lyra@gmail.com>
+
+properties:
+ compatible:
+ enum:
+ - sprd,iommu-v1
+
+ "#iommu-cells":
+ const: 0
+ description:
+ Unisoc IOMMUs are all single-master IOMMU devices, therefore no
+ additional information needs to associate with its master device.
+ Please refer to the generic bindings document for more details,
+ Documentation/devicetree/bindings/iommu/iommu.txt
+
+ reg:
+ maxItems: 1
+
+ clocks:
+ description:
+ Reference to a gate clock phandle, since access to some of IOMMUs are
+ controlled by gate clock, but this is not required.
+
+required:
+ - compatible
+ - reg
+ - "#iommu-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ iommu_disp: iommu@63000800 {
+ compatible = "sprd,iommu-v1";
+ reg = <0x63000800 0x80>;
+ #iommu-cells = <0>;
+ };
+
+ - |
+ iommu_jpg: iommu@62300300 {
+ compatible = "sprd,iommu-v1";
+ reg = <0x62300300 0x80>;
+ #iommu-cells = <0>;
+ clocks = <&mm_gate 1>;
+ };
+
+...
--
2.25.1
next prev parent reply other threads:[~2021-03-05 9:34 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-05 9:32 [PATCH v5 0/2] Add Unisoc IOMMU basic driver Chunyan Zhang
2021-03-05 9:32 ` Chunyan Zhang [this message]
2021-03-05 9:32 ` [PATCH v5 2/2] iommu: add " Chunyan Zhang
2021-03-18 9:51 ` [PATCH v5 0/2] Add " Joerg Roedel
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