1 Message unit node:
2
3 For SRIO controllers that implement the message unit as part of the controller
4 this node is required. For devices with RMAN this node should NOT exist. The
5 node is composed of three types of sub-nodes ("fsl-srio-msg-unit",
6 "fsl-srio-dbell-unit" and "fsl-srio-port-write-unit").
7
8 See srio.txt for more details about generic SRIO controller details.
9
10 - compatible
11 Usage: required
12 Value type: <string>
13 Definition: Must include "fsl,srio-rmu-vX.Y", "fsl,srio-rmu".
14
15 The version X.Y should match the general SRIO controller's IP Block
16 revision register's Major(X) and Minor (Y) value.
17
18 - reg
19 Usage: required
20 Value type: <prop-encoded-array>
21 Definition: A standard property. Specifies the physical address and
22 length of the SRIO configuration registers for message units
23 and doorbell units.
24
25 - fsl,liodn
26 Usage: optional-but-recommended (for devices with PAMU)
27 Value type: <prop-encoded-array>
28 Definition: The logical I/O device number for the PAMU (IOMMU) to be
29 correctly configured for SRIO accesses. The property should
30 not exist on devices that do not support PAMU.
31
32 The LIODN value is associated with all RMU transactions
33 (msg-unit, doorbell, port-write).
34
35 Sub-Nodes for RMU: The RMU node is composed of multiple sub-nodes that
36 correspond to the actual sub-controllers in the RMU. The manual for a given
37 SoC will detail which and how many of these sub-controllers are implemented.
38
39 Message Unit:
40
41 - compatible
42 Usage: required
43 Value type: <string>
44 Definition: Must include "fsl,srio-msg-unit-vX.Y", "fsl,srio-msg-unit".
45
46 The version X.Y should match the general SRIO controller's IP Block
47 revision register's Major(X) and Minor (Y) value.
48
49 - reg
50 Usage: required
51 Value type: <prop-encoded-array>
52 Definition: A standard property. Specifies the physical address and
53 length of the SRIO configuration registers for message units
54 and doorbell units.
55
56 - interrupts
57 Usage: required
58 Value type: <prop_encoded-array>
59 Definition: Specifies the interrupts generated by this device. The
60 value of the interrupts property consists of one interrupt
61 specifier. The format of the specifier is defined by the
62 binding document describing the node's interrupt parent.
63
64 A pair of IRQs are specified in this property. The first
65 element is associated with the transmit (TX) interrupt and the
66 second element is associated with the receive (RX) interrupt.
67
68 Doorbell Unit:
69
70 - compatible
71 Usage: required
72 Value type: <string>
73 Definition: Must include:
74 "fsl,srio-dbell-unit-vX.Y", "fsl,srio-dbell-unit"
75
76 The version X.Y should match the general SRIO controller's IP Block
77 revision register's Major(X) and Minor (Y) value.
78
79 - reg
80 Usage: required
81 Value type: <prop-encoded-array>
82 Definition: A standard property. Specifies the physical address and
83 length of the SRIO configuration registers for message units
84 and doorbell units.
85
86 - interrupts
87 Usage: required
88 Value type: <prop_encoded-array>
89 Definition: Specifies the interrupts generated by this device. The
90 value of the interrupts property consists of one interrupt
91 specifier. The format of the specifier is defined by the
92 binding document describing the node's interrupt parent.
93
94 A pair of IRQs are specified in this property. The first
95 element is associated with the transmit (TX) interrupt and the
96 second element is associated with the receive (RX) interrupt.
97
98 Port-Write Unit:
99
100 - compatible
101 Usage: required
102 Value type: <string>
103 Definition: Must include:
104 "fsl,srio-port-write-unit-vX.Y", "fsl,srio-port-write-unit"
105
106 The version X.Y should match the general SRIO controller's IP Block
107 revision register's Major(X) and Minor (Y) value.
108
109 - reg
110 Usage: required
111 Value type: <prop-encoded-array>
112 Definition: A standard property. Specifies the physical address and
113 length of the SRIO configuration registers for message units
114 and doorbell units.
115
116 - interrupts
117 Usage: required
118 Value type: <prop_encoded-array>
119 Definition: Specifies the interrupts generated by this device. The
120 value of the interrupts property consists of one interrupt
121 specifier. The format of the specifier is defined by the
122 binding document describing the node's interrupt parent.
123
124 A single IRQ that handles port-write conditions is
125 specified by this property. (Typically shared with error).
126
127 Note: All other standard properties (see the Devicetree Specification)
128 are allowed but are optional.
129
130 Example:
131 rmu: rmu@d3000 {
132 compatible = "fsl,srio-rmu";
133 reg = <0xd3000 0x400>;
134 ranges = <0x0 0xd3000 0x400>;
135 fsl,liodn = <0xc8>;
136
137 message-unit@0 {
138 compatible = "fsl,srio-msg-unit";
139 reg = <0x0 0x100>;
140 interrupts = <
141 60 2 0 0 /* msg1_tx_irq */
142 61 2 0 0>;/* msg1_rx_irq */
143 };
144 message-unit@100 {
145 compatible = "fsl,srio-msg-unit";
146 reg = <0x100 0x100>;
147 interrupts = <
148 62 2 0 0 /* msg2_tx_irq */
149 63 2 0 0>;/* msg2_rx_irq */
150 };
151 doorbell-unit@400 {
152 compatible = "fsl,srio-dbell-unit";
153 reg = <0x400 0x80>;
154 interrupts = <
155 56 2 0 0 /* bell_outb_irq */
156 57 2 0 0>;/* bell_inb_irq */
157 };
158 port-write-unit@4e0 {
159 compatible = "fsl,srio-port-write-unit";
160 reg = <0x4e0 0x20>;
161 interrupts = <16 2 1 11>;
162 };
163 };
Linux® is a registered trademark of Linus Torvalds in the United States and other countries.
TOMOYO® is a registered trademark of NTT DATA CORPORATION.