dt-bindings: soc: ti: pruss: Update bindings for K3 J721E SoCs

The K3 J721E SoCs have a revised version of the ICSSG IP present on
AM65x. One of the chief differences is the presence of an additional
PRU core per slice called a Tx_PRU, while retaining almost all of the
sub-modules from AM65x. Update the PRUSS bindings for these newer ICSSG
instances.

Signed-off-by: Suman Anna <s-anna@ti.com>
Reviewed-by: Roger Quadros <rogerq@ti.com>

Documentation/devicetree/bindings/soc/ti/ti,pruss.txt

@@ -50,6 +50,7 @@ Required Properties:
                        "ti,am5728-pruss-soc-bus" for AM57xx family of SoCs
                        "ti,k2g-pruss-soc-bus" for 66AK2G family of SoCs
                        "ti,am654-icssg-soc-bus" for K3 AM65x family of SoCs
+                       "ti,j721e-icssg-soc-bus" for K3 J721E family of SoCs
 - reg            : address and size of the PRUSS CFG sub-module register
                    dictating the interconnect configuration
 - #address-cells : should be 1
@@ -62,8 +63,8 @@ SoC-specific Required properties:
 The following are mandatory properties for all OMAP-architecture based SoCs:
 - ti,hwmods      : name of the hwmod associated with the PRUSS instance
 
-The following properties are _required_ only for Keystone 2 66AK2G SoCs and
-K3 AM65x SoCs only:
+The following properties are _required_ only for Keystone 2 66AK2G SoCs,
+K3 AM65x SoCs and K3 J721E SoCs only:
 - power-domains  : Should contain a phandle to a PM domain provider node and an
                    args specifier containing the PRUSS SCI device id value. This
                    property is as per the binding,
@@ -85,6 +86,7 @@ Required Properties:
                        "ti,am5728-pruss" for AM57xx family of SoCs
                        "ti,k2g-pruss" for 66AK2G family of SoCs
                        "ti,am654-icssg" for K3 AM65x family of SoCs
+                       "ti,j721e-icssg" for K3 J721E family of SoCs
 - reg            : base address and size of the entire PRU-ICSS space
 - interrupts     : all the interrupts generated towards the main host
                    processor in the SoC. The format depends on the
@@ -103,7 +105,7 @@ Required Properties:
                    same address view as the parent, so should be mentioned without
                    any value for the property
 
-Optional Properties: (Applies only to "ti,am654-icssg")
+Optional Properties: (Applies only to "ti,am654-icssg" and "ti,j721e-icssg")
 --------------------
 - ti,psil-base	    : PSIL thread start number
 - ti,psil-config<n> :   PSIL configuration for each thread number
@@ -174,7 +176,7 @@ Required Properties:
 
 PRUSS INTC Node
 ================
-Each PRUSS has a single interrupt controller instance that is common to both
+Each PRUSS has a single interrupt controller instance that is common to all
 the PRU cores. This should be represented as an interrupt-controller node. The
 bindings for this shall be defined in the file,
     Documentation/devicetree/bindings/interrupt-controller/ti,pruss-intc.txt
@@ -184,8 +186,9 @@ PRU Node
 =========
 Each PRUSS has dual PRU cores, each represented as a remoteproc device through
 a PRU child node each. Each node can optionally be rendered inactive by using
-the standard DT string property, "status". The bindings for this shall be
-defined in the file,
+the standard DT string property, "status". The ICSSG IP present on K3 SoCs have
+additional auxiliary PRU cores with slightly different IP integration. The
+bindings for this shall be defined in the file,
     Documentation/devicetree/bindings/remoteproc/ti,pru-rproc.txt