Message unit node:
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For SRIO controllers that implement the message unit as part of the controller
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this node is required. For devices with RMAN this node should NOT exist. The
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node is composed of three types of sub-nodes ("fsl-srio-msg-unit",
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"fsl-srio-dbell-unit" and "fsl-srio-port-write-unit").
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See srio.txt for more details about generic SRIO controller details.
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- compatible
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Usage: required
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Value type: <string>
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Definition: Must include "fsl,srio-rmu-vX.Y", "fsl,srio-rmu".
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The version X.Y should match the general SRIO controller's IP Block
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revision register's Major(X) and Minor (Y) value.
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- reg
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Usage: required
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Value type: <prop-encoded-array>
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Definition: A standard property. Specifies the physical address and
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length of the SRIO configuration registers for message units
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and doorbell units.
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- fsl,liodn
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Usage: optional-but-recommended (for devices with PAMU)
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Value type: <prop-encoded-array>
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Definition: The logical I/O device number for the PAMU (IOMMU) to be
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correctly configured for SRIO accesses. The property should
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not exist on devices that do not support PAMU.
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The LIODN value is associated with all RMU transactions
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(msg-unit, doorbell, port-write).
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Sub-Nodes for RMU: The RMU node is composed of multiple sub-nodes that
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correspond to the actual sub-controllers in the RMU. The manual for a given
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SoC will detail which and how many of these sub-controllers are implemented.
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Message Unit:
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- compatible
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Usage: required
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Value type: <string>
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Definition: Must include "fsl,srio-msg-unit-vX.Y", "fsl,srio-msg-unit".
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The version X.Y should match the general SRIO controller's IP Block
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revision register's Major(X) and Minor (Y) value.
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- reg
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Usage: required
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Value type: <prop-encoded-array>
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Definition: A standard property. Specifies the physical address and
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length of the SRIO configuration registers for message units
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and doorbell units.
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- interrupts
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Usage: required
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Value type: <prop_encoded-array>
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Definition: Specifies the interrupts generated by this device. The
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value of the interrupts property consists of one interrupt
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specifier. The format of the specifier is defined by the
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binding document describing the node's interrupt parent.
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A pair of IRQs are specified in this property. The first
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element is associated with the transmit (TX) interrupt and the
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second element is associated with the receive (RX) interrupt.
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Doorbell Unit:
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- compatible
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Usage: required
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Value type: <string>
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Definition: Must include:
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"fsl,srio-dbell-unit-vX.Y", "fsl,srio-dbell-unit"
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The version X.Y should match the general SRIO controller's IP Block
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revision register's Major(X) and Minor (Y) value.
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- reg
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Usage: required
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Value type: <prop-encoded-array>
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Definition: A standard property. Specifies the physical address and
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length of the SRIO configuration registers for message units
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and doorbell units.
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- interrupts
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Usage: required
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Value type: <prop_encoded-array>
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Definition: Specifies the interrupts generated by this device. The
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value of the interrupts property consists of one interrupt
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specifier. The format of the specifier is defined by the
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binding document describing the node's interrupt parent.
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A pair of IRQs are specified in this property. The first
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element is associated with the transmit (TX) interrupt and the
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second element is associated with the receive (RX) interrupt.
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Port-Write Unit:
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- compatible
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Usage: required
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Value type: <string>
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Definition: Must include:
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"fsl,srio-port-write-unit-vX.Y", "fsl,srio-port-write-unit"
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The version X.Y should match the general SRIO controller's IP Block
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revision register's Major(X) and Minor (Y) value.
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- reg
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Usage: required
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Value type: <prop-encoded-array>
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Definition: A standard property. Specifies the physical address and
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length of the SRIO configuration registers for message units
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and doorbell units.
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- interrupts
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Usage: required
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Value type: <prop_encoded-array>
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Definition: Specifies the interrupts generated by this device. The
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value of the interrupts property consists of one interrupt
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specifier. The format of the specifier is defined by the
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binding document describing the node's interrupt parent.
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A single IRQ that handles port-write conditions is
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specified by this property. (Typically shared with error).
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Note: All other standard properties (see the Devicetree Specification)
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are allowed but are optional.
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Example:
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rmu: rmu@d3000 {
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compatible = "fsl,srio-rmu";
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reg = <0xd3000 0x400>;
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ranges = <0x0 0xd3000 0x400>;
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fsl,liodn = <0xc8>;
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message-unit@0 {
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compatible = "fsl,srio-msg-unit";
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reg = <0x0 0x100>;
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interrupts = <
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60 2 0 0 /* msg1_tx_irq */
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61 2 0 0>;/* msg1_rx_irq */
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};
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message-unit@100 {
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compatible = "fsl,srio-msg-unit";
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reg = <0x100 0x100>;
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interrupts = <
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62 2 0 0 /* msg2_tx_irq */
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63 2 0 0>;/* msg2_rx_irq */
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};
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doorbell-unit@400 {
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compatible = "fsl,srio-dbell-unit";
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reg = <0x400 0x80>;
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interrupts = <
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56 2 0 0 /* bell_outb_irq */
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57 2 0 0>;/* bell_inb_irq */
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};
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port-write-unit@4e0 {
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compatible = "fsl,srio-port-write-unit";
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reg = <0x4e0 0x20>;
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interrupts = <16 2 1 11>;
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};
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};
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