164 lines · plain
1Message unit node:2 3For SRIO controllers that implement the message unit as part of the controller4this node is required. For devices with RMAN this node should NOT exist. The5node is composed of three types of sub-nodes ("fsl-srio-msg-unit",6"fsl-srio-dbell-unit" and "fsl-srio-port-write-unit").7 8See srio.txt for more details about generic SRIO controller details.9 10 - compatible11 Usage: required12 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 Block16 revision register's Major(X) and Minor (Y) value.17 18 - reg19 Usage: required20 Value type: <prop-encoded-array>21 Definition: A standard property. Specifies the physical address and22 length of the SRIO configuration registers for message units23 and doorbell units.24 25 - fsl,liodn26 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 be29 correctly configured for SRIO accesses. The property should30 not exist on devices that do not support PAMU.31 32 The LIODN value is associated with all RMU transactions33 (msg-unit, doorbell, port-write).34 35Sub-Nodes for RMU: The RMU node is composed of multiple sub-nodes that36correspond to the actual sub-controllers in the RMU. The manual for a given37SoC will detail which and how many of these sub-controllers are implemented.38 39Message Unit:40 41 - compatible42 Usage: required43 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 Block47 revision register's Major(X) and Minor (Y) value.48 49 - reg50 Usage: required51 Value type: <prop-encoded-array>52 Definition: A standard property. Specifies the physical address and53 length of the SRIO configuration registers for message units54 and doorbell units.55 56 - interrupts57 Usage: required58 Value type: <prop_encoded-array>59 Definition: Specifies the interrupts generated by this device. The60 value of the interrupts property consists of one interrupt61 specifier. The format of the specifier is defined by the62 binding document describing the node's interrupt parent.63 64 A pair of IRQs are specified in this property. The first65 element is associated with the transmit (TX) interrupt and the66 second element is associated with the receive (RX) interrupt.67 68Doorbell Unit:69 70 - compatible71 Usage: required72 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 Block77 revision register's Major(X) and Minor (Y) value.78 79 - reg80 Usage: required81 Value type: <prop-encoded-array>82 Definition: A standard property. Specifies the physical address and83 length of the SRIO configuration registers for message units84 and doorbell units.85 86 - interrupts87 Usage: required88 Value type: <prop_encoded-array>89 Definition: Specifies the interrupts generated by this device. The90 value of the interrupts property consists of one interrupt91 specifier. The format of the specifier is defined by the92 binding document describing the node's interrupt parent.93 94 A pair of IRQs are specified in this property. The first95 element is associated with the transmit (TX) interrupt and the96 second element is associated with the receive (RX) interrupt.97 98Port-Write Unit:99 100 - compatible101 Usage: required102 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 Block107 revision register's Major(X) and Minor (Y) value.108 109 - reg110 Usage: required111 Value type: <prop-encoded-array>112 Definition: A standard property. Specifies the physical address and113 length of the SRIO configuration registers for message units114 and doorbell units.115 116 - interrupts117 Usage: required118 Value type: <prop_encoded-array>119 Definition: Specifies the interrupts generated by this device. The120 value of the interrupts property consists of one interrupt121 specifier. The format of the specifier is defined by the122 binding document describing the node's interrupt parent.123 124 A single IRQ that handles port-write conditions is125 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 130Example: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 };164