linux-kernel - [PATCH 1/9] dt-bindings: mstar: Add binding details for mstar,smpctrl

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Message-Id: <20201130131047.2648960-2-daniel@0x0f.com>
Date:   Mon, 30 Nov 2020 22:10:39 +0900
From:   Daniel Palmer <daniel@...f.com>
To:     devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Cc:     linux-kernel@...r.kernel.org, arnd@...db.de, robh@...nel.org,
        w@....eu, daniel@...f.com
Subject: [PATCH 1/9] dt-bindings: mstar: Add binding details for mstar,smpctrl

This adds a YAML description of the smpctrl node needed by the
platform code for the MStar/SigmaStar Armv7 SoCs to boot secondary cpus.

Signed-off-by: Daniel Palmer <daniel@...f.com>
---
 .../bindings/arm/mstar/mstar,smpctrl.yaml     | 38 +++++++++++++++++++
 1 file changed, 38 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/mstar/mstar,smpctrl.yaml

diff --git a/Documentation/devicetree/bindings/arm/mstar/mstar,smpctrl.yaml b/Documentation/devicetree/bindings/arm/mstar/mstar,smpctrl.yaml
new file mode 100644
index 000000000000..a102287b5c88
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/mstar/mstar,smpctrl.yaml
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2020 thingy.jp.
+%YAML 1.2
+---
+$id: "http://devicetree.org/schemas/arm/mstar/mstar,smpctrl.yaml#"
+$schema: "http://devicetree.org/meta-schemas/core.yaml#"
+
+title: MStar/SigmaStar Armv7 SoC SMP control registers
+
+maintainers:
+  - Daniel Palmer <daniel@...ngy.jp>
+
+description: |
+  MStar/SigmaStar's Armv7 SoCs that have more than one processor
+  have a region of registers that allow setting the boot address
+  and a magic number that allows secondary processors to leave
+  the loop they are parked in by the boot ROM.
+
+properties:
+  compatible:
+    items:
+      - const: mstar,smpctrl
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    smpctrl@...000 {
+        compatible = "mstar,smpctrl";
+        reg = <0x204000 0x200>;
+    };
-- 
2.29.2