xref: /linux/Documentation/devicetree/bindings/iommu/rockchip,iommu.yaml (revision a4eb44a6435d6d8f9e642407a4a06f65eb90ca04) 
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    enum:
23      - rockchip,iommu
24      - rockchip,rk3568-iommu
25
26  reg:
27    items:
28      - description: configuration registers for MMU instance 0
29      - description: configuration registers for MMU instance 1
30    minItems: 1
31
32  interrupts:
33    items:
34      - description: interruption for MMU instance 0
35      - description: interruption for MMU instance 1
36    minItems: 1
37
38  clocks:
39    items:
40      - description: Core clock
41      - description: Interface clock
42
43  clock-names:
44    items:
45      - const: aclk
46      - const: iface
47
48  "#iommu-cells":
49    const: 0
50
51  power-domains:
52    maxItems: 1
53
54  rockchip,disable-mmu-reset:
55    $ref: /schemas/types.yaml#/definitions/flag
56    description: |
57      Do not use the mmu reset operation.
58      Some mmu instances may produce unexpected results
59      when the reset operation is used.
60
61required:
62  - compatible
63  - reg
64  - interrupts
65  - clocks
66  - clock-names
67  - "#iommu-cells"
68
69additionalProperties: false
70
71examples:
72  - |
73    #include <dt-bindings/clock/rk3399-cru.h>
74    #include <dt-bindings/interrupt-controller/arm-gic.h>
75
76    vopl_mmu: iommu@ff940300 {
77      compatible = "rockchip,iommu";
78      reg = <0xff940300 0x100>;
79      interrupts = <GIC_SPI 16 IRQ_TYPE_LEVEL_HIGH>;
80      clocks = <&cru ACLK_VOP1>, <&cru HCLK_VOP1>;
81      clock-names = "aclk", "iface";
82      #iommu-cells = <0>;
83    };
84