[PATCH 03/17] dt-bindings: remoteproc: mediatek: Add APU rproc compatible

[Flora Fu]

Add new binding document for the APU remote processor.
The initial version is used for MT8192 SOC.

Signed-off-by: Pi-Cheng Chen <pi-cheng.chen at mediatek.com>
Signed-off-by: Flora Fu <flora.fu at mediatek.com>

---
 .../bindings/remoteproc/mediatek,apu-rv.yaml  | 106 ++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml

diff --git a/Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml b/Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml
new file mode 100644
index 000000000000..c390b85040eb
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/mediatek,apu-rv.yaml
@@ -0,0 +1,106 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2021 (C) MediaTek Inc.
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/remoteproc/mediatek,apu-rv.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek APU remote processor controller bindings
+
+description: |
+  APU integrated subsystem having MD32RV33 (MD32) that runs tinysys.
+  The tinysys runs on a microprocessor in APU.
+  Its firmware is loaded and booted from Kernel side.
+  Kernel and tinysys uses IPI to send and receive messages.
+
+maintainers:
+  - Flora Fu <flora.fu at mediatek.com>
+  - Pi-Cheng Chen <pi-cheng.chen at mediatek.com>
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - mediatek,mt8192-apusys-rv
+      - const: simple-mfd
+
+  reg:
+    minItems: 1
+
+  reg-names:
+    minItems: 1
+
+  power-domains:
+    maxItems: 1
+
+  iommus:
+    maxItems: 1
+
+  interrupts:
+    description: List of interrupts.
+
+  interrupt-names:
+    description: Name list of interrupts.
+
+  mboxes:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - power-domains
+  - interrupts
+  - mboxes
+
+additionalProperties:
+  type: object
+  description:
+    Represent subnodes that will register as rpmsg devices.
+  properties:
+    compatible:
+      enum:
+        - mediatek,apu-ctrl-rpmsg
+        - mediatek,apupwr-tx-rpmsg
+        - mediatek,apupwr-rx-rpmsg
+        - mediatek,apu-mdw-rpmsg
+    mediatek,rpmsg-name:
+      $ref: /schemas/types.yaml#/definitions/string-array
+      description:
+        Contains the name for the rpmsg device. Used to match
+        the subnode to rpmsg device announced by APU.
+  required:
+    - compatible
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8192-clk.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/memory/mt8192-larb-port.h>
+
+    apusys_rv at 19001000 {
+      compatible = "mediatek,mt8192-apusys-rv", "simple-mfd";
+      reg = <0x19001000 0x1000>;
+      reg-names = "md32_sysctrl";
+      power-domains = <&apuspm 0>;
+      iommus = <&iommu_apu IOMMU_PORT_APU_DATA>;
+      interrupts = <GIC_SPI 393 IRQ_TYPE_LEVEL_HIGH 0>;
+      interrupt-names = "apu_wdt";
+      mboxes = <&apu_mailbox 0>;
+      apu_ctrl {
+        compatible = "mediatek,apu-ctrl-rpmsg";
+        mediatek,rpmsg-name = "apu-ctrl-rpmsg";
+      };
+      apu_pwr_tx {
+        compatible = "mediatek,apupwr-tx-rpmsg";
+        mediatek,rpmsg-name = "apupwr-tx-rpmsg";
+      };
+      apu_pwr_rx {
+        compatible = "mediatek,apupwr-rx-rpmsg";
+        mediatek,rpmsg-name = "apupwr-rx-rpmsg";
+      };
+      apu_mdw_rpmsg {
+        compatible = "mediatek,apu-mdw-rpmsg";
+        mediatek,rpmsg-name = "apu-mdw-rpmsg";
+      };
+    };
-- 
2.18.0