[PATCH v4 1/4] dt-bindings: mfd: Add bindings for Ampere Altra SMPro drivers

[Quan Nguyen]

Adds device tree bindings for SMPro driver found on the Mt.Jade hardware
reference platform with Ampere's Altra Processor family.

The SMpro co-processor on Ampere Altra processor family is to monitor
and report various data included hwmon-related info, RAS errors, and
other miscellaneous information. This parent SMPro MFD driver creates
a single simple register map to be shared by all sub-devices and leave
all the specific to be handled by the child drivers.

Signed-off-by: Quan Nguyen <quan at os.amperecomputing.com>
---
Changes in v4:
  + Revised the commit message to clarify how the specific info will
    be handled commented by Rob.

Changes in v3:
  + Supported list of compatible string [Rob]
  + Introduced reg property in DT to specify reg offset [Rob]
  + Updated description and other minor changes in yaml file [Rob]

Changes in v2:
  + Changed "ampere,ac01-smpro" to "ampere,smpro" [Quan]

 .../bindings/hwmon/ampere,ac01-hwmon.yaml     |  28 +++++
 .../devicetree/bindings/mfd/ampere,smpro.yaml | 105 ++++++++++++++++++
 2 files changed, 133 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/hwmon/ampere,ac01-hwmon.yaml
 create mode 100644 Documentation/devicetree/bindings/mfd/ampere,smpro.yaml

diff --git a/Documentation/devicetree/bindings/hwmon/ampere,ac01-hwmon.yaml b/Documentation/devicetree/bindings/hwmon/ampere,ac01-hwmon.yaml
new file mode 100644
index 000000000000..fbf7ec754160
--- /dev/null
+++ b/Documentation/devicetree/bindings/hwmon/ampere,ac01-hwmon.yaml
@@ -0,0 +1,28 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/hwmon/ampere,ac01-hwmon.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Hardware monitoring driver for the Ampere Altra SMPro
+
+maintainers:
+  - Quan Nguyen <quan at os.amperecomputing.com>
+
+description: |
+  This module is part of the Ampere Altra SMPro multi-function device. For more
+  details see ../mfd/ampere,smpro.yaml.
+
+properties:
+  compatible:
+    enum:
+      - ampere,ac01-hwmon
+
+  reg:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+
+additionalProperties: false
diff --git a/Documentation/devicetree/bindings/mfd/ampere,smpro.yaml b/Documentation/devicetree/bindings/mfd/ampere,smpro.yaml
new file mode 100644
index 000000000000..5613c420869e
--- /dev/null
+++ b/Documentation/devicetree/bindings/mfd/ampere,smpro.yaml
@@ -0,0 +1,105 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/mfd/ampere,smpro.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Ampere Altra SMPro firmware driver
+
+maintainers:
+  - Quan Nguyen <quan at os.amperecomputing.com>
+
+description: |
+  Ampere Altra SMPro firmware may contain different blocks like hardware
+  monitoring, error monitoring and other miscellaneous features.
+
+properties:
+  compatible:
+    enum:
+      - ampere,smpro
+
+  reg:
+    description:
+      I2C device address.
+    maxItems: 1
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+patternProperties:
+  "^hwmon(@[0-9a-f]+)?$":
+    $ref: ../hwmon/ampere,ac01-hwmon.yaml
+
+  "^misc(@[0-9a-f]+)?$":
+    type: object
+    description: |
+      This module is part of the Ampere Altra SMPro multi-function device
+      to support miscellaneous features
+    properties:
+      compatible:
+        enum:
+          - ampere,ac01-misc
+      reg:
+        maxItems: 1
+
+    required:
+      - compatible
+      - reg
+
+  "^errmon(@[0-9a-f]+)?$":
+    type: object
+    description: |
+      This module is part of the Ampere Altra SMPro multi-function device
+      that supports error monitoring feature.
+
+    properties:
+      compatible:
+        enum:
+          - ampere,ac01-errmon
+      reg:
+        maxItems: 1
+
+    required:
+      - compatible
+      - reg
+
+required:
+  - "#address-cells"
+  - "#size-cells"
+  - compatible
+  - reg
+
+additionalProperties: false
+
+examples:
+  - |
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        smpro at 4f {
+            compatible = "ampere,smpro";
+            reg = <0x4f>;
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            hwmon at 10 {
+                compatible = "ampere,ac01-hwmon";
+                reg = <0x10>;
+            };
+
+            misc at b0 {
+                compatible = "ampere,ac01-misc";
+                reg = <0xb0>;
+            };
+
+            errmon at 80 {
+                compatible = "ampere,ac01-errmon";
+                reg = <0x80>;
+            };
+
+        };
+    };
-- 
2.28.0