dts: nordic: Add DPPIC and IPCT nodes to nRF54H20 EngA

And add the corresponding bindings.

Move alse the already existing bindings for nrf-dppic, nrf-ppi,
and nrf-ipc so they are located together with the new ones and
in more appropriate folders (DPPIC and PPI peripherals are not
related to ARM, and IPC is for sending and receiving events,
not messages, so ipm/ does not seem to be the best fit for it).

Signed-off-by: Andrzej Głąbek <andrzej.glabek@nordicsemi.no>

dts/bindings/ipc/nordic,nrf-ipct-common.yaml

@@ -0,0 +1,45 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic IPCT (Interprocessor Communication Transceiver)
+
+include: base.yaml
+
+properties:
+  reg:
+    required: true
+
+  channels:
+    type: int
+    required: true
+    description: Number of channels implemented by the IPCT instance.
+
+  source-channel-links:
+    type: array
+    description: |
+      Mapping of IPCT channels that are mapped between two IPCT instances on
+      separate domains, in which a channel on this IPCT node is considered
+      the source. This array is then comprised of a 3-integer-wide "unit"
+      that defines one connection of the mapping. The format of this unit
+      is <source_channel sink_domain_id sink_channel>. Units are sequential
+      in the array, therefore requiring the length of this property to be
+      a factor of 3.
+
+      For example, if channel 2 is to be mapped to Radio Core (ID: 3) IPCT
+      channel 4, then the array "unit" would be <2 NRF_DOMAIN_ID_RADIOCORE 4>
+      or <2 3 4>.
+
+  sink-channel-links:
+    type: array
+    description: |
+      Mapping of IPCT channels that are mapped between two IPCT instances on
+      separate domains, in which a channel on this IPCT node is considered
+      the sink. This array is then comprised of a 3-integer-wide "unit"
+      that defines one connection of the mapping. The format of this unit
+      is <sink_channel source_domain_id source_channel>. Units are sequential
+      in the array, therefore requiring the length of this property to be
+      a factor of 3.
+
+      For example, if channel 2 is to be mapped to Radio Core (ID: 3) IPCT
+      channel 4, then the array "unit" would be <2 NRF_DOMAIN_ID_RADIOCORE 4>
+      or <2 3 4>.

dts/bindings/ipc/nordic,nrf-ipct-global.yaml

@@ -0,0 +1,17 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic Global IPCT (Interprocessor Communication Transceiver)
+
+compatible: "nordic,nrf-ipct-global"
+
+include: ["nordic,nrf-ipct-common.yaml", "nordic,split-channels.yaml"]
+
+properties:
+  global-domain-id:
+    required: true
+    type: int
+    description: |
+      Global IPCT instances reside on specific buses within the Global Domain,
+      such as fast and slow, which have different IDs that do not match the
+      standard Global Domain ID presented in their address.

dts/bindings/ipc/nordic,nrf-ipct-local.yaml

@@ -0,0 +1,12 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic Local IPCT (Interprocessor Communication Transceiver)
+
+compatible: "nordic,nrf-ipct-local"
+
+include: "nordic,nrf-ipct-common.yaml"
+
+properties:
+  interrupts:
+    required: true

dts/bindings/misc/nordic,nrf-dppic-global.yaml

@@ -0,0 +1,18 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+  Nordic Global DPPIC
+  (Distributed Programmable Peripheral Interconnect Controller)
+
+  Updated DPPIC binding set for Nordic products that have global DPPIC instances
+  with inter-bridge functionality. These instances also have split-ownership
+  of its channels and channel groups.
+
+compatible: "nordic,nrf-dppic-global"
+
+include:
+  - "nordic,nrf-dppic.yaml"
+  - "nordic,nrf-dppic-links.yaml"
+  - "nordic,split-channels.yaml"
+  - "nordic,split-channel-groups.yaml"

dts/bindings/misc/nordic,nrf-dppic-links.yaml

@@ -0,0 +1,17 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic DPPIC Channel Linking
+
+properties:
+  source-channels:
+    type: array
+    description: |
+      Channels that are linked to channels of DPPIC instances on separate
+      bridges as publishing sources.
+
+  sink-channels:
+    type: array
+    description: |
+      Channels that are linked to channels of DPPIC instances on separate
+      bridges as subscribing sinks.

dts/bindings/misc/nordic,nrf-dppic-local.yaml

@@ -0,0 +1,13 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
+
+description: |
+  Nordic Local DPPIC
+  (Distributed Programmable Peripheral Interconnect Controller)
+
+  Updated DPPIC binding set for Nordic products that have local DPPIC instances
+  with inter-bridge functionality.
+
+compatible: "nordic,nrf-dppic-local"
+
+include: ["nordic,nrf-dppic.yaml", "nordic,nrf-dppic-links.yaml"]

dts/bindings/misc/nordic,split-channel-groups.yaml

@@ -0,0 +1,20 @@
+# Copyright (c) 2024 Nordic Semiconductor ASA
+# SPDX-License-Identifier: Apache-2.0
+
+description: Nordic Split Channel Groups
+
+properties:
+  owned-channel-groups:
+    type: array
+    description: |
+      List of channel groups of a split-ownership peripheral that are to be
+      owned for use by the compiled domain.
+
+  nonsecure-channel-groups:
+    type: array
+    description: |
+      List of channel groups in a split-ownership, split-security peripheral
+      that are to be configured as nonsecure. In Trustzone systems, this
+      property is only evaluated for secure peripherals, as nonsecure channels
+      are implicitly specified through the owned-channels property. This
+      property is ignored in non-Trustzone systems.