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From: Tanmay Shah <tanmay.shah@amd.com>
To: <andersson@kernel.org>, <mathieu.poirier@linaro.org>, <robh@kernel.org>,
	<krzysztof.kozlowski+dt@linaro.org>, <conor+dt@kernel.org>,
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CC: <linux-remoteproc@vger.kernel.org>, <devicetree@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>,
	Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Subject: [PATCH v14 2/4] dt-bindings: remoteproc: add Tightly Coupled Memory (TCM) bindings
Date: Mon, 8 Apr 2024 13:53:12 -0700
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From: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>

Introduce bindings for TCM memory address space on AMD-xilinx Zynq
UltraScale+ platform. It will help in defining TCM in device-tree
and make it's access platform agnostic and data-driven.

Tightly-coupled memories(TCMs) are low-latency memory that provides
predictable instruction execution and predictable data load/store
timing. Each Cortex-R5F processor contains two 64-bit wide 64 KB memory
banks on the ATCM and BTCM ports, for a total of 128 KB of memory.

The TCM resources(reg, reg-names and power-domain) are documented for
each TCM in the R5 node. The reg and reg-names are made as required
properties as we don't want to hardcode TCM addresses for future
platforms and for zu+ legacy implementation will ensure that the
old dts w/o reg/reg-names works and stable ABI is maintained.

It also extends the examples for TCM split and lockstep modes.

Signed-off-by: Radhey Shyam Pandey <radhey.shyam.pandey@amd.com>
Signed-off-by: Tanmay Shah <tanmay.shah@amd.com>

---

Changes in v14:
  - Remove previous RB tag
  - Add xlnx,tcm-mode property
  - Add Versal platform support
  - Add Versal-NET platform support

 .../remoteproc/xlnx,zynqmp-r5fss.yaml         | 279 ++++++++++++++++--
 1 file changed, 257 insertions(+), 22 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml b/Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml
index 78aac69f1060..6f13da11f593 100644
--- a/Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml
+++ b/Documentation/devicetree/bindings/remoteproc/xlnx,zynqmp-r5fss.yaml
@@ -18,11 +18,26 @@ description: |
 
 properties:
   compatible:
-    const: xlnx,zynqmp-r5fss
+    enum:
+      - xlnx,zynqmp-r5fss
+      - xlnx,versal-r5fss
+      - xlnx,versal-net-r52fss
+
+  "#address-cells":
+    const: 2
+
+  "#size-cells":
+    const: 2
+
+  ranges:
+    description: |
+      Standard ranges definition providing address translations for
+      local R5F TCM address spaces to bus addresses.
 
   xlnx,cluster-mode:
     $ref: /schemas/types.yaml#/definitions/uint32
     enum: [0, 1, 2]
+    default: 1
     description: |
       The RPU MPCore can operate in split mode (Dual-processor performance), Safety
       lock-step mode(Both RPU cores execute the same code in lock-step,
@@ -36,8 +51,16 @@ properties:
       1: lockstep mode (default)
       2: single cpu mode
 
+  xlnx,tcm-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    enum: [0, 1]
+    description: |
+      Configure RPU TCM
+      0: split mode
+      1: lockstep mode
+
 patternProperties:
-  "^r5f-[a-f0-9]+$":
+  "^r(.*)@[0-9a-f]+$":
     type: object
     description: |
       The RPU is located in the Low Power Domain of the Processor Subsystem.
@@ -52,10 +75,22 @@ patternProperties:
 
     properties:
       compatible:
-        const: xlnx,zynqmp-r5f
+        enum:
+          - xlnx,zynqmp-r5f
+          - xlnx,versal-r5f
+          - xlnx,versal-net-r52f
+
+      reg:
+        minItems: 1
+        maxItems: 4
+
+      reg-names:
+        minItems: 1
+        maxItems: 4
 
       power-domains:
-        maxItems: 1
+        minItems: 2
+        maxItems: 5
 
       mboxes:
         minItems: 1
@@ -101,35 +136,235 @@ patternProperties:
 
     required:
       - compatible
+      - reg
+      - reg-names
       - power-domains
 
-    unevaluatedProperties: false
-
 required:
   - compatible
+  - "#address-cells"
+  - "#size-cells"
+  - ranges
+
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - xlnx,versal-net-r52fss
+    then:
+      properties:
+        xlnx,tcm-mode: false
+
+      patternProperties:
+        "^r52f@[0-9a-f]+$":
+          type: object
+
+          properties:
+            reg:
+              minItems: 1
+              items:
+                - description: ATCM internal memory
+                - description: BTCM internal memory
+                - description: CTCM internal memory
+
+            reg-names:
+              minItems: 1
+              items:
+                - const: atcm0
+                - const: btcm0
+                - const: ctcm0
+
+            power-domains:
+              minItems: 2
+              items:
+                - description: RPU core power domain
+                - description: ATCM power domain
+                - description: BTCM power domain
+                - description: CTCM power domain
+
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - xlnx,zynqmp-r5fss
+              - xlnx,versal-r5fss
+    then:
+      if:
+        properties:
+          xlnx,cluster-mode:
+            enum: [1, 2]
+      then:
+        properties:
+          xlnx,tcm-mode:
+            enum: [1]
+
+        patternProperties:
+          "^r5f@[0-9a-f]+$":
+            type: object
+
+            properties:
+              reg:
+                minItems: 1
+                items:
+                  - description: ATCM internal memory
+                  - description: BTCM internal memory
+                  - description: extra ATCM memory in lockstep mode
+                  - description: extra BTCM memory in lockstep mode
+
+              reg-names:
+                minItems: 1
+                items:
+                  - const: atcm0
+                  - const: btcm0
+                  - const: atcm1
+                  - const: btcm1
+
+              power-domains:
+                minItems: 2
+                items:
+                  - description: RPU core power domain
+                  - description: ATCM power domain
+                  - description: BTCM power domain
+                  - description: second ATCM power domain
+                  - description: second BTCM power domain
+
+        required:
+          - xlnx,tcm-mode
+
+      else:
+        properties:
+          xlnx,tcm-mode:
+            enum: [0]
+
+        patternProperties:
+          "^r5f@[0-9a-f]+$":
+            type: object
+
+            properties:
+              reg:
+                minItems: 1
+                items:
+                  - description: ATCM internal memory
+                  - description: BTCM internal memory
+
+              reg-names:
+                minItems: 1
+                items:
+                  - const: atcm0
+                  - const: btcm0
+
+              power-domains:
+                minItems: 2
+                items:
+                  - description: RPU core power domain
+                  - description: ATCM power domain
+                  - description: BTCM power domain
+
+        required:
+          - xlnx,tcm-mode
 
 additionalProperties: false
 
 examples:
   - |
-    remoteproc {
-        compatible = "xlnx,zynqmp-r5fss";
-        xlnx,cluster-mode = <1>;
-
-        r5f-0 {
-            compatible = "xlnx,zynqmp-r5f";
-            power-domains = <&zynqmp_firmware 0x7>;
-            memory-region = <&rproc_0_fw_image>, <&rpu0vdev0buffer>, <&rpu0vdev0vring0>, <&rpu0vdev0vring1>;
-            mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>;
-            mbox-names = "tx", "rx";
+    #include <dt-bindings/power/xlnx-zynqmp-power.h>
+
+    // Split mode configuration
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        remoteproc@ffe00000 {
+            compatible = "xlnx,zynqmp-r5fss";
+            xlnx,cluster-mode = <0>;
+            xlnx,tcm-mode = <0>;
+
+            #address-cells = <2>;
+            #size-cells = <2>;
+            ranges = <0x0 0x0 0x0 0xffe00000 0x0 0x10000>,
+                     <0x0 0x20000 0x0 0xffe20000 0x0 0x10000>,
+                     <0x1 0x0 0x0 0xffe90000 0x0 0x10000>,
+                     <0x1 0x20000 0x0 0xffeb0000 0x0 0x10000>;
+
+            r5f@0 {
+                compatible = "xlnx,zynqmp-r5f";
+                reg = <0x0 0x0 0x0 0x10000>, <0x0 0x20000 0x0 0x10000>;
+                reg-names = "atcm0", "btcm0";
+                power-domains = <&zynqmp_firmware PD_RPU_0>,
+                                <&zynqmp_firmware PD_R5_0_ATCM>,
+                                <&zynqmp_firmware PD_R5_0_BTCM>;
+                memory-region = <&rproc_0_fw_image>, <&rpu0vdev0buffer>,
+                                <&rpu0vdev0vring0>, <&rpu0vdev0vring1>;
+                mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>;
+                mbox-names = "tx", "rx";
+            };
+
+            r5f@1 {
+                compatible = "xlnx,zynqmp-r5f";
+                reg = <0x1 0x0 0x0 0x10000>, <0x1 0x20000 0x0 0x10000>;
+                reg-names = "atcm0", "btcm0";
+                power-domains = <&zynqmp_firmware PD_RPU_1>,
+                                <&zynqmp_firmware PD_R5_1_ATCM>,
+                                <&zynqmp_firmware PD_R5_1_BTCM>;
+                memory-region = <&rproc_1_fw_image>, <&rpu1vdev0buffer>,
+                                <&rpu1vdev0vring0>, <&rpu1vdev0vring1>;
+                mboxes = <&ipi_mailbox_rpu1 0>, <&ipi_mailbox_rpu1 1>;
+                mbox-names = "tx", "rx";
+            };
         };
+    };
+
+  - |
+    //Lockstep configuration
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        remoteproc@ffe00000 {
+            compatible = "xlnx,zynqmp-r5fss";
+            xlnx,cluster-mode = <1>;
+            xlnx,tcm-mode = <1>;
+
+            #address-cells = <2>;
+            #size-cells = <2>;
+            ranges = <0x0 0x0 0x0 0xffe00000 0x0 0x10000>,
+                     <0x0 0x20000 0x0 0xffe20000 0x0 0x10000>,
+                     <0x0 0x10000 0x0 0xffe10000 0x0 0x10000>,
+                     <0x0 0x30000 0x0 0xffe30000 0x0 0x10000>;
+
+            r5f@0 {
+                compatible = "xlnx,zynqmp-r5f";
+                reg = <0x0 0x0 0x0 0x10000>,
+                      <0x0 0x20000 0x0 0x10000>,
+                      <0x0 0x10000 0x0 0x10000>,
+                      <0x0 0x30000 0x0 0x10000>;
+                reg-names = "atcm0", "btcm0", "atcm1", "btcm1";
+                power-domains = <&zynqmp_firmware PD_RPU_0>,
+                                <&zynqmp_firmware PD_R5_0_ATCM>,
+                                <&zynqmp_firmware PD_R5_0_BTCM>,
+                                <&zynqmp_firmware PD_R5_1_ATCM>,
+                                <&zynqmp_firmware PD_R5_1_BTCM>;
+                memory-region = <&rproc_0_fw_image>, <&rpu0vdev0buffer>,
+                                <&rpu0vdev0vring0>, <&rpu0vdev0vring1>;
+                mboxes = <&ipi_mailbox_rpu0 0>, <&ipi_mailbox_rpu0 1>;
+                mbox-names = "tx", "rx";
+            };
 
-        r5f-1 {
-            compatible = "xlnx,zynqmp-r5f";
-            power-domains = <&zynqmp_firmware 0x8>;
-            memory-region = <&rproc_1_fw_image>, <&rpu1vdev0buffer>, <&rpu1vdev0vring0>, <&rpu1vdev0vring1>;
-            mboxes = <&ipi_mailbox_rpu1 0>, <&ipi_mailbox_rpu1 1>;
-            mbox-names = "tx", "rx";
+            r5f@1 {
+                compatible = "xlnx,zynqmp-r5f";
+                reg = <0x1 0x0 0x0 0x10000>, <0x1 0x20000 0x0 0x10000>;
+                reg-names = "atcm0", "btcm0";
+                power-domains = <&zynqmp_firmware PD_RPU_1>,
+                                <&zynqmp_firmware PD_R5_1_ATCM>,
+                                <&zynqmp_firmware PD_R5_1_BTCM>;
+                memory-region = <&rproc_1_fw_image>, <&rpu1vdev0buffer>,
+                                <&rpu1vdev0vring0>, <&rpu1vdev0vring1>;
+                mboxes = <&ipi_mailbox_rpu1 0>, <&ipi_mailbox_rpu1 1>;
+                mbox-names = "tx", "rx";
+            };
         };
     };
 ...
-- 
2.25.1