ARM: dts: dra7: Add PRU-ICSS interconnect target-module nodes

The AM57xx family of SoCs contains two identical PRU-ICSS instances
that have a very unique SYSC register. The IPs do not have any
PRCM reset lines unlike those on AM33xx/AM437x SoCs. Add the PRUSS
interconnect target-module nodes with all the required properties.

Each of the PRUSS devices themselves shall be added as child nodes
to the corresponding interconnect node in the future. The PRU-ICSS
instances are only available on AM57xx family of SoCs and are not
supported on DRA7xx family of SoCs in general, so the target module
nodes are added in a separate dtsi file. This new dtsi file is
included in all the AM57xx SoC dtsi files, so the nodes are
automatically inherited and enabled on all AM57xx boards.
Signed-off-by: Suman Anna <s-anna@ti.com>
Signed-off-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/boot/dts/am57-pruss.dtsi

+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (C) 2020 Texas Instruments Incorporated - http://www.ti.com/
+ *
+ * Common PRUSS data for TI AM57xx platforms
+ */
+
+&ocp {
+	pruss1_tm: target-module@4b226000 {
+		compatible = "ti,sysc-pruss", "ti,sysc";
+		reg = <0x4b226000 0x4>,
+		      <0x4b226004 0x4>;
+		reg-names = "rev", "sysc";
+		ti,sysc-mask = <(SYSC_PRUSS_STANDBY_INIT |
+				 SYSC_PRUSS_SUB_MWAIT)>;
+		ti,sysc-midle = <SYSC_IDLE_FORCE>,
+				<SYSC_IDLE_NO>,
+				<SYSC_IDLE_SMART>;
+		ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+				<SYSC_IDLE_NO>,
+				<SYSC_IDLE_SMART>;
+		/* Domains (P, C): coreaon_pwrdm, l4per2_clkdm */
+		clocks = <&l4per2_clkctrl DRA7_L4PER2_PRUSS1_CLKCTRL 0>;
+		clock-names = "fck";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x00000000 0x4b200000 0x80000>;
+	};
+
+	pruss2_tm: target-module@4b2a6000 {
+		compatible = "ti,sysc-pruss", "ti,sysc";
+		reg = <0x4b2a6000 0x4>,
+		      <0x4b2a6004 0x4>;
+		reg-names = "rev", "sysc";
+		ti,sysc-mask = <(SYSC_PRUSS_STANDBY_INIT |
+				 SYSC_PRUSS_SUB_MWAIT)>;
+		ti,sysc-midle = <SYSC_IDLE_FORCE>,
+				<SYSC_IDLE_NO>,
+				<SYSC_IDLE_SMART>;
+		ti,sysc-sidle = <SYSC_IDLE_FORCE>,
+				<SYSC_IDLE_NO>,
+				<SYSC_IDLE_SMART>;
+		/* Domains (P, C): coreaon_pwrdm, l4per2_clkdm */
+		clocks = <&l4per2_clkctrl DRA7_L4PER2_PRUSS2_CLKCTRL 0>;
+		clock-names = "fck";
+		#address-cells = <1>;
+		#size-cells = <1>;
+		ranges = <0x00000000 0x4b280000 0x80000>;
+	};
+};

arch/arm/boot/dts/am5718.dtsi

@@ -4,6 +4,7 @@
  */
 
 #include "dra72x.dtsi"
+#include "am57-pruss.dtsi"
 
 / {
 	compatible = "ti,am5718", "ti,dra7";

arch/arm/boot/dts/am5728.dtsi

@@ -4,6 +4,7 @@
  */
 
 #include "dra74x.dtsi"
+#include "am57-pruss.dtsi"
 
 / {
 	compatible = "ti,am5728", "ti,dra7";

arch/arm/boot/dts/am5748.dtsi

@@ -4,6 +4,7 @@
  */
 
 #include "dra76x.dtsi"
+#include "am57-pruss.dtsi"
 
 / {
 	compatible = "ti,am5748", "ti,dra762", "ti,dra7";

arch/arm/boot/dts/dra7.dtsi

@@ -143,7 +143,7 @@ mpu {
 	 * the moment, just use a fake OCP bus entry to represent the whole bus
 	 * hierarchy.
 	 */
-	ocp {
+	ocp: ocp {
 		compatible = "ti,dra7-l3-noc", "simple-bus";
 		#address-cells = <1>;
 		#size-cells = <1>;