linux-kernel - [PATCH V7 1/6] dt-bindings: soc: add i.MX93 SRC

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Date:   Mon, 22 Aug 2022 16:31:01 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        shawnguo@...nel.org, s.hauer@...gutronix.de
Cc:     kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        aisheng.dong@....com, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Peng Fan <peng.fan@....com>, Rob Herring <robh@...nel.org>
Subject: [PATCH V7 1/6] dt-bindings: soc: add i.MX93 SRC

From: Peng Fan <peng.fan@....com>

Add bindings for i.MX93 System Reset Controller(SRC). SRC supports
resets and power gating for mixes.

Reviewed-by: Rob Herring <robh@...nel.org>
Signed-off-by: Peng Fan <peng.fan@....com>
---
 .../bindings/soc/imx/fsl,imx93-src.yaml       | 96 +++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/imx/fsl,imx93-src.yaml

diff --git a/Documentation/devicetree/bindings/soc/imx/fsl,imx93-src.yaml b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-src.yaml
new file mode 100644
index 000000000000..c1cc69b51981
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/imx/fsl,imx93-src.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/imx/fsl,imx93-src.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX93 System Reset Controller
+
+maintainers:
+  - Peng Fan <peng.fan@....com>
+
+description: |
+  The System Reset Controller (SRC) is responsible for the generation of
+  all the system reset signals and boot argument latching.
+
+  Its main functions are as follows,
+  - Deals with all global system reset sources from other modules,
+    and generates global system reset.
+  - Responsible for power gating of MIXs (Slices) and their memory
+    low power control.
+
+properties:
+  compatible:
+    items:
+      - const: fsl,imx93-src
+      - const: syscon
+
+  reg:
+    maxItems: 1
+
+  ranges: true
+
+  '#address-cells':
+    const: 1
+
+  '#size-cells':
+    const: 1
+
+patternProperties:
+  "power-domain@[0-9a-f]+$":
+
+    type: object
+    properties:
+      compatible:
+        items:
+          - const: fsl,imx93-src-slice
+
+      '#power-domain-cells':
+        const: 0
+
+      reg:
+        items:
+          - description: mix slice register region
+          - description: mem slice register region
+
+      clocks:
+        description: |
+          A number of phandles to clocks that need to be enabled
+          during domain power-up sequencing to ensure reset
+          propagation into devices located inside this power domain.
+        minItems: 1
+        maxItems: 5
+
+    required:
+      - compatible
+      - '#power-domain-cells'
+      - reg
+
+required:
+  - compatible
+  - reg
+  - ranges
+  - '#address-cells'
+  - '#size-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx93-clock.h>
+
+    system-controller@...60000 {
+        compatible = "fsl,imx93-src", "syscon";
+        reg = <0x44460000 0x10000>;
+        #address-cells = <1>;
+        #size-cells = <1>;
+        ranges;
+
+        mediamix: power-domain@0 {
+            compatible = "fsl,imx93-src-slice";
+            reg = <0x44462400 0x400>, <0x44465800 0x400>;
+            #power-domain-cells = <0>;
+            clocks = <&clk IMX93_CLK_MEDIA_AXI>,
+                     <&clk IMX93_CLK_MEDIA_APB>;
+        };
+    };
-- 
2.37.1