From: Suman Anna <s-anna@xxxxxx>
Update the PRUSS DT bindings to add the properties required to support the
optional virtio rpmsg stack using the virtio-ring based communication
transport between MPU and a PRU core.
Signed-off-by: Suman Anna <s-anna@xxxxxx>
---
.../devicetree/bindings/soc/ti/ti,pruss.txt | 39 ++++++++++++++++++++++
1 file changed, 39 insertions(+)
diff --git a/Documentation/devicetree/bindings/soc/ti/ti,pruss.txt b/Documentation/devicetree/bindings/soc/ti/ti,pruss.txt
index 24fedad..3e5f32f 100644
--- a/Documentation/devicetree/bindings/soc/ti/ti,pruss.txt
+++ b/Documentation/devicetree/bindings/soc/ti/ti,pruss.txt
@@ -175,6 +175,32 @@ Required Properties:
- firmware-name : should contain the name of the default firmware image file
located on the firmware search path
+Optional Properties:
+--------------------
+The virtio based communication between the MPU and a PRU core _requires_
+either the 'mboxes' property, or the set of 'interrupt-parent', 'interrupts'
+and 'interrupt-names' properties to be defined. The latter option is the
+preferred choice. The 'mboxes' property is not applicable for 66AK2G and
+DA850/OMAP-L138 SoCs.
+
+- mboxes : OMAP Mailbox specifier denoting the sub-mailbox, if using
+ a mailbox for IPC signalling between host and a PRU core.
+ The specifier format is as per the bindings,
+ Documentation/devicetree/bindings/mailbox/omap-mailbox.txt
+ This property should match with the sub-mailbox node used
+ in the corresponding firmware image.
+- interrupt-parent : phandle to the PRUSS INTC node. Should be defined if
+ interrupts property is to be used.
+- interrupts : array of interrupt specifiers if using PRU system events
+ for IPC signalling between host and a PRU core. This
+ property should match with the PRU system event used in
+ the corresponding firmware image.
+- interrupt-names : should use one of the following names for each interrupt,
+ the name should match the corresponding PRU system event
+ number,
+ "vring" - for PRU to HOST virtqueue signalling
+ "kick" - for HOST to PRU virtqueue signalling
+
MDIO Child Node
================
@@ -243,6 +269,9 @@ Example:
<0x4a322400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am335x-pru0-fw";
+ interrupt-parent = <&pruss_intc>;
+ interrupts = <16>, <17>;
+ interrupt-names = "vring", "kick";
};
pru1: pru@4a338000 {
@@ -252,6 +281,10 @@ Example:
<0x4a324400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am335x-pru1-fw";
+ interrupt-parent = <&pruss_intc>;
+ interrupts = <18>, <19>;
+ interrupt-names = "vring", "kick";
+ /* mboxes = <&mailbox &mbox_pru1>; */
};
pruss_mdio: mdio@4a332400 {
@@ -329,6 +362,9 @@ Example:
<0x54422400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am437x-pru1_0-fw";
+ interrupt-parent = <&pruss1_intc>;
+ interrupts = <16>, <17>;
+ interrupt-names = "vring", "kick";
};
pru1_1: pru@54438000 {
@@ -338,6 +374,9 @@ Example:
<0x54424400 0x100>;
reg-names = "iram", "control", "debug";
firmware-name = "am437x-pru1_1-fw";
+ interrupt-parent = <&pruss1_intc>;
+ interrupts = <18>, <19>;
+ interrupt-names = "vring", "kick";
};
pruss1_mdio: mdio@54432400 {
--
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