linux-kernel - [PATCH 1/4] dt-bindings: reset: add generic bit reset controller

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Message-ID: <20250213020900.745551-2-inochiama@gmail.com>
Date: Thu, 13 Feb 2025 10:08:54 +0800
From: Inochi Amaoto <inochiama@...il.com>
To: Philipp Zabel <p.zabel@...gutronix.de>,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chen Wang <unicorn_wang@...look.com>,
	Inochi Amaoto <inochiama@...il.com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>,
	Guo Ren <guoren@...nel.org>,
	Uwe Kleine-König <u.kleine-koenig@...libre.com>
Cc: devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	sophgo@...ts.linux.dev,
	linux-riscv@...ts.infradead.org,
	Yixun Lan <dlan@...too.org>,
	Longbin Li <looong.bin@...il.com>
Subject: [PATCH 1/4] dt-bindings: reset: add generic bit reset controller

Some SoCs from Aspeed, Allwinner, Sophgo and Synopsys have
a simple reset controller by toggling bit. It is a hard time
for each device to add its own compatible to the driver.
Since this device share a common design, it is possible to
add a common device to reduce these unnecessary change.

Add common binding for these kind generic reset controller.

Signed-off-by: Inochi Amaoto <inochiama@...il.com>
---
 .../bindings/reset/reset-simple.yaml          | 42 +++++++++++++++++++
 1 file changed, 42 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/reset/reset-simple.yaml

diff --git a/Documentation/devicetree/bindings/reset/reset-simple.yaml b/Documentation/devicetree/bindings/reset/reset-simple.yaml
new file mode 100644
index 000000000000..77584e23e8e8
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/reset-simple.yaml
@@ -0,0 +1,42 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/reset-simple.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Generic BIT Reset Controller
+
+maintainers:
+  - Inochi Amaoto <inochiama@...il.com>
+
+description:
+  Some reset controller devices uses a simple method to perform
+  assert/deassert by toggling bit. Some SoCs from Aspeed, Allwinner,
+  Sophgo and Synopsys have this kind of reset controller instances.
+
+properties:
+  compatible:
+    enum:
+      - reset-simple-high
+      - reset-simple-low
+
+  reg:
+    maxItems: 1
+
+  "#reset-cells":
+    const: 1
+
+required:
+  - compatible
+  - reg
+  - "#reset-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    reset-controller@...0000 {
+        compatible = "reset-simple-high";
+        reg = <0x1000000 0x1000>;
+        #reset-cells = <1>;
+    };
-- 
2.48.1