linux-kernel - [PATCH v4 1/9] dt-bindings: mfd: Add TI-Nspire misc registers

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Date:   Tue, 1 Nov 2022 16:57:56 -0500
From:   Andrew Davis <afd@...com>
To:     Lee Jones <lee@...nel.org>, Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Arnd Bergmann <arnd@...db.de>,
        Linus Walleij <linus.walleij@...aro.org>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Daniel Tang <dt.tangr@...il.com>,
        Fabian Vogt <fabian@...ter-vogt.de>
CC:     <devicetree@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>, Andrew Davis <afd@...com>
Subject: [PATCH v4 1/9] dt-bindings: mfd: Add TI-Nspire misc registers

The TI Nspire devices contain a set of registers with a seemingly
miscellaneous set of functionality. This area is known simply as the
"misc" region.

Signed-off-by: Andrew Davis <afd@...com>
---
 .../bindings/mfd/ti,nspire-misc.yaml          | 55 +++++++++++++++++++
 1 file changed, 55 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml

diff --git a/Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml b/Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml
new file mode 100644
index 0000000000000..d409eae7537bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ti,nspire-misc.yaml
@@ -0,0 +1,55 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (C) 2022 Texas Instruments Incorporated - https://www.ti.com/
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ti,nspire-misc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: TI Nspire MISC hardware block
+
+maintainers:
+  - Andrew Davis <afd@...com>
+
+description: |
+  System controller node represents a register region containing a set
+  of miscellaneous registers. The registers are not cohesive enough to
+  represent as any specific type of device. The typical use-case is
+  for some other node's driver, or platform-specific code, to acquire
+  a reference to the syscon node (e.g. by phandle, node path, or
+  search using a specific compatible value), interrogate the node (or
+  associated OS driver) to determine the location of the registers,
+  and access the registers directly.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - ti,nspire-misc
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  reboot:
+    $ref: "../power/reset/syscon-reboot.yaml"
+
+required:
+  - compatible
+  - reg
+  - reboot
+
+additionalProperties: false
+
+examples:
+  - |
+    misc: misc@...a0000 {
+      compatible = "ti,nspire-misc", "syscon", "simple-mfd";
+      reg = <0x900a0000 0x1000>;
+
+      reboot {
+        compatible = "syscon-reboot";
+        offset = <0x08>;
+        value = <0x02>;
+      };
+    };
-- 
2.37.3