xref: /linux/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml (revision 75f74f85a42eb294b657f847c33e1bb7921dbec9) 
1# SPDX-License-Identifier: GPL-2.0-only
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/iommu/rockchip,iommu.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Rockchip IOMMU
8
9maintainers:
10  - Heiko Stuebner <heiko@sntech.de>
11
12description: |+
13  A Rockchip DRM iommu translates io virtual addresses to physical addresses for
14  its master device. Each slave device is bound to a single master device and
15  shares its clocks, power domain and irq.
16
17  For information on assigning IOMMU controller to its peripheral devices,
18  see generic IOMMU bindings.
19
20properties:
21  compatible:
22    oneOf:
23      - enum:
24          - rockchip,iommu
25          - rockchip,rk3568-iommu
26      - items:
27          - enum:
28              - rockchip,rk3588-iommu
29          - const: rockchip,rk3568-iommu
30
31  reg:
32    items:
33      - description: configuration registers for MMU instance 0
34      - description: configuration registers for MMU instance 1
35    minItems: 1
36
37  interrupts:
38    items:
39      - description: interruption for MMU instance 0
40      - description: interruption for MMU instance 1
41    minItems: 1
42
43  clocks:
44    items:
45      - description: Core clock
46      - description: Interface clock
47
48  clock-names:
49    items:
50      - const: aclk
51      - const: iface
52
53  "#iommu-cells":
54    const: 0
55
56  power-domains:
57    maxItems: 1
58
59  rockchip,disable-mmu-reset:
60    $ref: /schemas/types.yaml#/definitions/flag
61    description: |
62      Do not use the mmu reset operation.
63      Some mmu instances may produce unexpected results
64      when the reset operation is used.
65
66required:
67  - compatible
68  - reg
69  - interrupts
70  - clocks
71  - clock-names
72  - "#iommu-cells"
73
74additionalProperties: false
75
76examples:
77  - |
78    #include <dt-bindings/clock/rk3399-cru.h>
79    #include <dt-bindings/interrupt-controller/arm-gic.h>
80
81    vopl_mmu: iommu@ff940300 {
82      compatible = "rockchip,iommu";
83      reg = <0xff940300 0x100>;
84      interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
85      clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
86      clock-names = "aclk", "iface";
87      #iommu-cells = <0>;
88    };
89