xref: /linux/Documentation/devicetree/bindings/interrupt-controller/ti,sci-inta.yaml (revision 34f7c6e7d4396090692a09789db231e12cb4762b) 
1# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
2%YAML 1.2
3---
4$id: http://devicetree.org/schemas/interrupt-controller/ti,sci-inta.yaml#
5$schema: http://devicetree.org/meta-schemas/core.yaml#
6
7title: Texas Instruments K3 Interrupt Aggregator
8
9maintainers:
10  - Lokesh Vutla <lokeshvutla@ti.com>
11
12allOf:
13  - $ref: /schemas/arm/keystone/ti,k3-sci-common.yaml#
14
15description: |
16  The Interrupt Aggregator (INTA) provides a centralized machine
17  which handles the termination of system events to that they can
18  be coherently processed by the host(s) in the system. A maximum
19  of 64 events can be mapped to a single interrupt.
20
21                                Interrupt Aggregator
22                       +-----------------------------------------+
23                       |      Intmap            VINT             |
24                       | +--------------+  +------------+        |
25              m ------>| | vint  | bit  |  | 0 |.....|63| vint0  |
26                 .     | +--------------+  +------------+        |      +------+
27                 .     |         .               .               |      | HOST |
28  Globalevents  ------>|         .               .               |----->| IRQ  |
29                 .     |         .               .               |      | CTRL |
30                 .     |         .               .               |      +------+
31              n ------>| +--------------+  +------------+        |
32                       | | vint  | bit  |  | 0 |.....|63| vintx  |
33                       | +--------------+  +------------+        |
34                       |                                         |
35                       |      Unmap                              |
36                       | +--------------+                        |
37  Unmapped events ---->| |   umapidx    |-------------------------> Globalevents
38                       | +--------------+                        |
39                       |                                         |
40                       +-----------------------------------------+
41
42  Configuration of these Intmap registers that maps global events to vint is
43  done by a system controller (like the Device Memory and Security Controller
44  on AM654 SoC). Driver should request the system controller to get the range
45  of global events and vints assigned to the requesting host. Management
46  of these requested resources should be handled by driver and requests
47  system controller to map specific global event to vint, bit pair.
48
49  Communication between the host processor running an OS and the system
50  controller happens through a protocol called TI System Control Interface
51  (TISCI protocol).
52
53properties:
54  compatible:
55    const: ti,sci-inta
56
57  reg:
58    maxItems: 1
59
60  interrupt-controller: true
61
62  msi-controller: true
63
64  ti,interrupt-ranges:
65    $ref: /schemas/types.yaml#/definitions/uint32-matrix
66    description: |
67      Interrupt ranges that converts the INTA output hw irq numbers
68      to parents's input interrupt numbers.
69    items:
70      items:
71        - description: |
72            "output_irq" specifies the base for inta output irq
73        - description: |
74            "parent's input irq" specifies the base for parent irq
75        - description: |
76            "limit" specifies the limit for translation
77
78  ti,unmapped-event-sources:
79    $ref: /schemas/types.yaml#/definitions/phandle-array
80    items:
81      maxItems: 1
82    description:
83      Array of phandles to DMA controllers where the unmapped events originate.
84
85required:
86  - compatible
87  - reg
88  - interrupt-controller
89  - msi-controller
90  - ti,sci
91  - ti,sci-dev-id
92  - ti,interrupt-ranges
93
94unevaluatedProperties: false
95
96examples:
97  - |
98    bus {
99        #address-cells = <2>;
100        #size-cells = <2>;
101
102        main_udmass_inta: msi-controller@33d00000 {
103            compatible = "ti,sci-inta";
104            reg = <0x0 0x33d00000 0x0 0x100000>;
105            interrupt-controller;
106            msi-controller;
107            interrupt-parent = <&main_navss_intr>;
108            ti,sci = <&dmsc>;
109            ti,sci-dev-id = <179>;
110            ti,interrupt-ranges = <0 0 256>;
111        };
112    };
113