[PATCH v3 07/11] dt-bindings: arm: apple: Add apple,pmgr binding

[Hector Martin]

The PMGR block in Apple Silicon SoCs is responsible for SoC power
management. There are two PMGRs in T8103, with different register
layouts but compatible registers. In order to support this as well
as future SoC generations with backwards-compatible registers, we
declare these blocks as syscons and bind to individual registers
in child nodes. Each register controls one SoC device.

The respective apple compatibles are defined in case device-specific
quirks are necessary in the future, but currently these nodes are
expected to be bound by the generic syscon driver.

Reviewed-by: Mark Kettenis <kettenis at openbsd.org>
Signed-off-by: Hector Martin <marcan at marcan.st>
---
 .../bindings/arm/apple/apple,pmgr.yaml        | 134 ++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml

diff --git a/Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml b/Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml
new file mode 100644
index 000000000000..b6b5d3a912b3
--- /dev/null
+++ b/Documentation/devicetree/bindings/arm/apple/apple,pmgr.yaml
@@ -0,0 +1,134 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/arm/apple/apple,pmgr.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple SoC Power Manager (PMGR)
+
+maintainers:
+  - Hector Martin <marcan at marcan.st>
+
+description: |
+  Apple SoCs include PMGR blocks responsible for power management,
+  which can control various clocks, resets, power states, and
+  performance features. This node represents the PMGR as a syscon,
+  with sub-nodes representing individual features.
+
+properties:
+  $nodename:
+    pattern: "^power-management@[0-9a-f]+$"
+
+  compatible:
+    items:
+      - enum:
+          - apple,t8103-pmgr
+          - apple,t6000-pmgr
+      - const: apple,pmgr
+      - const: syscon
+      - const: simple-mfd
+
+  reg:
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 1
+
+patternProperties:
+  "power-controller@[0-9a-f]+$":
+    description:
+      The individual power management domains within this controller
+    type: object
+    $ref: /power/apple,pmgr-pwrstate.yaml#
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    soc {
+        #address-cells = <2>;
+        #size-cells = <2>;
+
+        power-management at 23b700000 {
+            compatible = "apple,t8103-pmgr", "apple,pmgr", "syscon", "simple-mfd";
+            #address-cells = <1>;
+            #size-cells = <1>;
+            reg = <0x2 0x3b700000 0x0 0x14000>;
+
+            ps_sio: power-controller at 1c0 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x1c0 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "sio";
+                apple,always-on;
+            };
+
+            ps_uart_p: power-controller at 220 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x220 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "uart_p";
+                power-domains = <&ps_sio>;
+            };
+
+            ps_uart0: power-controller at 270 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x270 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "uart0";
+                power-domains = <&ps_uart_p>;
+            };
+        };
+
+        power-management at 23d280000 {
+            compatible = "apple,t8103-pmgr", "apple,pmgr", "syscon", "simple-mfd";
+            #address-cells = <1>;
+            #size-cells = <1>;
+            reg = <0x2 0x3d280000 0x0 0xc000>;
+
+            ps_aop_filter: power-controller at 4000 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x4000 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "aop_filter";
+            };
+
+            ps_aop_base: power-controller at 4010 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x4010 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "aop_base";
+                power-domains = <&ps_aop_filter>;
+            };
+
+            ps_aop_shim: power-controller at 4038 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x4038 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "aop_shim";
+                power-domains = <&ps_aop_base>;
+            };
+
+            ps_aop_uart0: power-controller at 4048 {
+                compatible = "apple,t8103-pmgr-pwrstate", "apple,pmgr-pwrstate";
+                reg = <0x4048 8>;
+                #power-domain-cells = <0>;
+                #reset-cells = <0>;
+                label = "aop_uart0";
+                power-domains = <&ps_aop_shim>;
+            };
+        };
+    };
-- 
2.33.0