Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
Received-SPF: Pass (protection.outlook.com: domain of xilinx.com designates
 149.199.60.83 as permitted sender) receiver=protection.outlook.com;
 client-ip=149.199.60.83; helo=xsj-pvapsmtpgw01;
From:   Ben Levinsky <ben.levinsky@xilinx.com>
To:     punit1.agrawal@toshiba.co.jp, stefanos@xilinx.com,
        michals@xilinx.com, michael.auchter@ni.com
Cc:     devicetree@vger.kernel.org, mathieu.poirier@linaro.org,
        emooring@xilinx.com, linux-remoteproc@vger.kernel.org,
        linux-kernel@vger.kernel.org, jliang@xilinx.com,
        robh+dt@kernel.org, linux-arm-kernel@lists.infradead.org,
        Jason Wu <j.wu@xilinx.com>,
        Michal Simek <michal.simek@xilinx.com>
Subject: [PATCH v14 4/5] dt-bindings: remoteproc: Add documentation for ZynqMP R5 rproc bindings
Date:   Thu, 17 Sep 2020 12:43:40 -0700
Message-Id: <20200917194341.16272-5-ben.levinsky@xilinx.com>
In-Reply-To: <20200917194341.16272-1-ben.levinsky@xilinx.com>
References: <20200917194341.16272-1-ben.levinsky@xilinx.com>
MIME-Version: 1.0
Content-Type: text/plain
X-MS-Exchange-CrossTenant-OriginalArrivalTime: 17 Sep 2020 19:43:45.2660
 (UTC)
X-MS-Exchange-CrossTenant-Network-Message-Id: d3fc49d3-78a4-489e-5d21-08d85b41fd40
X-MS-Exchange-CrossTenant-Id: 657af505-d5df-48d0-8300-c31994686c5c
X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=657af505-d5df-48d0-8300-c31994686c5c;Ip=[149.199.60.83];Helo=[xsj-pvapsmtpgw01]
X-MS-Exchange-CrossTenant-AuthSource: SN1NAM02FT010.eop-nam02.prod.protection.outlook.com
X-MS-Exchange-CrossTenant-AuthAs: Anonymous
X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem
X-MS-Exchange-Transport-CrossTenantHeadersStamped: CY4PR02MB2631
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Add binding for ZynqMP R5 OpenAMP.

Represent the RPU domain resources in one device node. Each RPU
processor is a subnode of the top RPU domain node.

Signed-off-by: Jason Wu <j.wu@xilinx.com>
Signed-off-by: Wendy Liang <jliang@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>

Signed-off-by: Ben Levinsky <ben.levinsky@xilinx.com>
---
v3:
- update zynqmp_r5 yaml parsing to not raise warnings for extra
  information in children of R5 node. The warning "node has a unit
  name, but no reg or ranges property" will still be raised though 
  as this particular node is needed to describe the
  '#address-cells' and '#size-cells' information.
v4::
- remove warning '/example-0/rpu@ff9a0000/r5@0: 
  node has a unit name, but no reg or ranges property'
  by adding reg to r5 node.
v5:
- update device tree sample and yaml parsing to not raise any warnings
- description for memory-region in yaml parsing
- compatible string in yaml parsing for TCM
v6:
- remove coupling TCM nodes with remoteproc 
- remove mailbox as it is optional not needed
v7:
- change lockstep-mode to xlnx,cluster-mode
v9:
- show example IPC nodes and tcm bank nodes
v11:
- add property meta-memory-regions to illustrate link
  between r5 and TCM banks
- update so no warnings from 'make dt_binding_check'
v14:
- concerns were raised about the new property meta-memory-regions.
  There is no clear direction so for the moment I kept it in the series
- place IPC nodes in RAM in the reserved memory section
---
 .../xilinx,zynqmp-r5-remoteproc.yaml          | 119 ++++++++++++++++++
 1 file changed, 119 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml

diff --git a/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml b/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml
new file mode 100644
index 000000000000..cd2406b4dc24
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml
@@ -0,0 +1,119 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/remoteproc/xilinx,zynqmp-r5-remoteproc.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: Xilinx R5 remote processor controller bindings
+
+description:
+  This document defines the binding for the remoteproc component that loads and
+  boots firmwares on the Xilinx Zynqmp and Versal family chipset.
+
+  Note that the Linux has global addressing view of the R5-related memory (TCM)
+  so the absolute address ranges are provided in TCM reg's.
+maintainers:
+  - Ed Mooring <ed.mooring@xilinx.com>
+  - Ben Levinsky <ben.levinsky@xilinx.com>
+
+properties:
+  compatible:
+    const: "xlnx,zynqmp-r5-remoteproc-1.0"
+
+  lockstep-mode:
+    description:
+      R5 core configuration (split is 0 or lock-step and 1)
+    maxItems: 1
+
+  interrupts:
+    description:
+      Interrupt mapping for remoteproc IPI. It is required if the
+      user uses the remoteproc driver with the RPMsg kernel driver.
+    maxItems: 6
+
+  memory-region:
+    description:
+      collection of memory carveouts used for elf-loading and inter-processor
+      communication.
+    maxItems: 4
+    minItems: 4
+  meta-memory-regions:
+    description:
+      collection of memories that are not present in the top level memory
+      nodes' mapping. For example, R5s' TCM banks. These banks are needed
+      for R5 firmware meta data such as the R5 firmware's heap and stack
+  pnode-id:
+    maxItems: 1
+  mboxes:
+    maxItems: 2
+  mbox-names:
+    maxItems: 2
+
+examples:
+  - |
+     reserved-memory {
+          #address-cells = <1>;
+          #size-cells = <1>;
+          ranges;
+          elf_load: rproc@3ed000000 {
+               no-map;
+               reg = <0x3ed00000 0x40000>;
+          };
+
+          rpu0vdev0vring0: rpu0vdev0vring0@3ed40000 {
+               no-map;
+               reg = <0x3ed40000 0x4000>;
+          };
+          rpu0vdev0vring1: rpu0vdev0vring1@3ed44000 {
+               no-map;
+               reg = <0x3ed44000 0x4000>;
+          };
+          rpu0vdev0buffer: rpu0vdev0buffer@3ed48000 {
+               no-map;
+               reg = <0x3ed48000 0x100000>;
+          };
+
+     };
+
+     /*
+      * Below nodes are required if using TCM to load R5 firmware
+      * if not, then either do not provide nodes are label as disabled in
+      * status property
+      */
+     tcm0a: tcm_0a@ffe00000 {
+         reg = <0xffe00000 0x10000>;
+         pnode-id = <0xf>;
+         no-map;
+         status = "okay";
+         phandle = <0x40>;
+         compatible = "xlnx,tcm";
+     };
+     tcm0b: tcm_1a@ffe20000 {
+         reg = <0xffe20000 0x10000>;
+         pnode-id = <0x10>;
+         no-map;
+         status = "okay";
+         compatible = "xlnx,tcm";
+         phandle = <0x41>;
+     };
+
+     rpu {
+          compatible = "xlnx,zynqmp-r5-remoteproc-1.0";
+          #address-cells = <1>;
+          #size-cells = <1>;
+          ranges;
+          lockstep-mode = <1>;
+          r5_0 {
+               ranges;
+               #address-cells = <1>;
+               #size-cells = <1>;
+               memory-region = <&elf_load>,
+                               <&rpu0vdev0vring0>,
+                               <&rpu0vdev0vring1>,
+                               <&rpu0vdev0buffer>;
+               meta-memory-regions = <&tcm_0a>, <&tcm_0b>;
+               pnode-id = <0x7>;
+          };
+     };
+
+...
-- 
2.17.1