linux-kernel - [PATCH V4 1/7] dt-bindings: soc: add i.MX93 SRC

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Date:   Thu,  9 Jun 2022 20:50:54 +0800
From:   "Peng Fan (OSS)" <peng.fan@....nxp.com>
To:     robh+dt@...nel.org, krzysztof.kozlowski+dt@...aro.org,
        sboyd@...nel.org, mturquette@...libre.com, shawnguo@...nel.org,
        s.hauer@...gutronix.de
Cc:     aisheng.dong@....com, l.stach@...gutronix.de,
        kernel@...gutronix.de, festevam@...il.com, linux-imx@....com,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, Peng Fan <peng.fan@....com>
Subject: [PATCH V4 1/7] 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.

Signed-off-by: Peng Fan <peng.fan@....com>
---
 .../bindings/power/fsl,imx93-src.yaml         | 96 +++++++++++++++++++
 include/dt-bindings/power/fsl,imx93-power.h   | 11 +++
 2 files changed, 107 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/power/fsl,imx93-src.yaml
 create mode 100644 include/dt-bindings/power/fsl,imx93-power.h

diff --git a/Documentation/devicetree/bindings/power/fsl,imx93-src.yaml b/Documentation/devicetree/bindings/power/fsl,imx93-src.yaml
new file mode 100644
index 000000000000..880500a841f7
--- /dev/null
+++ b/Documentation/devicetree/bindings/power/fsl,imx93-src.yaml
@@ -0,0 +1,96 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/power/fsl,imx93-src.yaml#
+$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
+
+  slices:
+    type: object
+    description: list of power domains provided by this controller.
+
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+    patternProperties:
+      "power-domain@[0-9]$":
+        $ref: /schemas/power/power-domain.yaml#
+
+        type: object
+        properties:
+          '#power-domain-cells':
+            const: 0
+
+          reg:
+            description: |
+              Power domain index. Valid values are defined in
+              include/dt-bindings/power/imx93-power.h for fsl,imx93-src
+            maxItems: 1
+
+          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:
+          - '#power-domain-cells'
+          - reg
+
+required:
+  - compatible
+  - reg
+  - slices
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/imx93-clock.h>
+    #include <dt-bindings/power/fsl,imx93-power.h>
+
+    system-controller@...60000 {
+        compatible = "fsl,imx93-src", "syscon";
+        reg = <0x44460000 0x10000>;
+
+        slices {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                mediamix: power-domain@0 {
+                        reg = <IMX93_POWER_DOMAIN_MEDIAMIX>;
+                        #power-domain-cells = <0>;
+                        clocks = <&clk IMX93_CLK_MEDIA_AXI>,
+                                 <&clk IMX93_CLK_MEDIA_APB>;
+                };
+        };
+    };
diff --git a/include/dt-bindings/power/fsl,imx93-power.h b/include/dt-bindings/power/fsl,imx93-power.h
new file mode 100644
index 000000000000..27fb7df80f93
--- /dev/null
+++ b/include/dt-bindings/power/fsl,imx93-power.h
@@ -0,0 +1,11 @@
+/* SPDX-License-Identifier: (GPL-2.0 OR MIT) */
+/*
+ *  Copyright 2022 NXP
+ */
+
+#ifndef __DT_BINDINGS_IMX93_POWER_H__
+#define __DT_BINDINGS_IMX93_POWER_H__
+
+#define IMX93_POWER_DOMAIN_MEDIAMIX		0
+
+#endif
-- 
2.25.1