1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
2 %YAML 1.2
3 ---
4 $id: http://devicetree.org/schemas/interrupt-controller/ti,pruss-intc.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
6
7 title: TI PRU-ICSS Local Interrupt Controller
8
9 maintainers:
10 - Suman Anna <s-anna@ti.com>
11
12 description: |
13 Each PRU-ICSS has a single interrupt controller instance that is common
14 to all the PRU cores. Most interrupt controllers can route 64 input events
15 which are then mapped to 10 possible output interrupts through two levels
16 of mapping. The input events can be triggered by either the PRUs and/or
17 various other PRUSS internal and external peripherals. The first 2 output
18 interrupts (0, 1) are fed exclusively to the internal PRU cores, with the
19 remaining 8 (2 through 9) connected to external interrupt controllers
20 including the MPU and/or other PRUSS instances, DSPs or devices.
21
22 The property "ti,irqs-reserved" is used for denoting the connection
23 differences on the output interrupts 2 through 9. If this property is not
24 defined, it implies that all the PRUSS INTC output interrupts 2 through 9
25 (host_intr0 through host_intr7) are connected exclusively to the Arm interrupt
26 controller.
27
28 The K3 family of SoCs can handle 160 input events that can be mapped to 20
29 different possible output interrupts. The additional output interrupts (10
30 through 19) are connected to new sub-modules within the ICSSG instances.
31
32 This interrupt-controller node should be defined as a child node of the
33 corresponding PRUSS node. The node should be named "interrupt-controller".
34
35 properties:
36 $nodename:
37 pattern: "^interrupt-controller@[0-9a-f]+$"
38
39 compatible:
40 enum:
41 - ti,pruss-intc
42 - ti,icssg-intc
43 description: |
44 Use "ti,pruss-intc" for OMAP-L13x/AM18x/DA850 SoCs,
45 AM335x family of SoCs,
46 AM437x family of SoCs,
47 AM57xx family of SoCs
48 66AK2G family of SoCs
49 Use "ti,icssg-intc" for K3 AM65x, J721E and AM64x family of SoCs
50
51 reg:
52 maxItems: 1
53
54 interrupts:
55 minItems: 1
56 maxItems: 8
57 description: |
58 All the interrupts generated towards the main host processor in the SoC.
59 A shared interrupt can be skipped if the desired destination and usage is
60 by a different processor/device.
61
62 interrupt-names:
63 minItems: 1
64 maxItems: 8
65 items:
66 pattern: host_intr[0-7]
67 description: |
68 Should use one of the above names for each valid host event interrupt
69 connected to Arm interrupt controller, the name should match the
70 corresponding host event interrupt number.
71
72 interrupt-controller: true
73
74 "#interrupt-cells":
75 const: 3
76 description: |
77 Client users shall use the PRU System event number (the interrupt source
78 that the client is interested in) [cell 1], PRU channel [cell 2] and PRU
79 host_event (target) [cell 3] as the value of the interrupts property in
80 their node. The system events can be mapped to some output host
81 interrupts through 2 levels of many-to-one mapping i.e. events to channel
82 mapping and channels to host interrupts so through this property entire
83 mapping is provided.
84
85 ti,irqs-reserved:
86 $ref: /schemas/types.yaml#/definitions/uint8
87 description: |
88 Bitmask of host interrupts between 0 and 7 (corresponding to PRUSS INTC
89 output interrupts 2 through 9) that are not connected to the Arm interrupt
90 controller or are shared and used by other devices or processors in the
91 SoC. Define this property when any of 8 interrupts should not be handled
92 by Arm interrupt controller.
93 Eg: - AM437x and 66AK2G SoCs do not have "host_intr5" interrupt
94 connected to MPU
95 - AM65x and J721E SoCs have "host_intr5", "host_intr6" and
96 "host_intr7" interrupts connected to MPU, and other ICSSG
97 instances.
98 - AM64x SoCs have all the 8 host interrupts connected to various
99 other SoC entities
100
101 required:
102 - compatible
103 - reg
104 - interrupts
105 - interrupt-names
106 - interrupt-controller
107 - "#interrupt-cells"
108
109 additionalProperties: false
110
111 examples:
112 - |
113 /* AM33xx PRU-ICSS */
114 pruss: pruss@0 {
115 compatible = "ti,am3356-pruss";
116 reg = <0x0 0x80000>;
117 #address-cells = <1>;
118 #size-cells = <1>;
119 ranges;
120
121 pruss_intc: interrupt-controller@20000 {
122 compatible = "ti,pruss-intc";
123 reg = <0x20000 0x2000>;
124 interrupts = <20 21 22 23 24 25 26 27>;
125 interrupt-names = "host_intr0", "host_intr1",
126 "host_intr2", "host_intr3",
127 "host_intr4", "host_intr5",
128 "host_intr6", "host_intr7";
129 interrupt-controller;
130 #interrupt-cells = <3>;
131 };
132 };
133
134 - |
135
136 /* AM4376 PRU-ICSS */
137 #include <dt-bindings/interrupt-controller/arm-gic.h>
138 pruss@0 {
139 compatible = "ti,am4376-pruss1";
140 reg = <0x0 0x40000>;
141 #address-cells = <1>;
142 #size-cells = <1>;
143 ranges;
144
145 interrupt-controller@20000 {
146 compatible = "ti,pruss-intc";
147 reg = <0x20000 0x2000>;
148 interrupt-controller;
149 #interrupt-cells = <3>;
150 interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>,
151 <GIC_SPI 21 IRQ_TYPE_LEVEL_HIGH>,
152 <GIC_SPI 22 IRQ_TYPE_LEVEL_HIGH>,
153 <GIC_SPI 23 IRQ_TYPE_LEVEL_HIGH>,
154 <GIC_SPI 24 IRQ_TYPE_LEVEL_HIGH>,
155 <GIC_SPI 26 IRQ_TYPE_LEVEL_HIGH>,
156 <GIC_SPI 27 IRQ_TYPE_LEVEL_HIGH>;
157 interrupt-names = "host_intr0", "host_intr1",
158 "host_intr2", "host_intr3",
159 "host_intr4",
160 "host_intr6", "host_intr7";
161 ti,irqs-reserved = /bits/ 8 <0x20>; /* BIT(5) */
162 };
163 };
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