Re: [PATCH v2 17/21] dt-bindings: ipmi: Convert ASPEED KCS binding to schema

[Zev Weiss <zweiss@equinix.com>]

On Fri, Mar 19, 2021 at 01:27:48AM CDT, Andrew Jeffery wrote:
>Given the deprecated binding, improve the ability to detect issues in
>the platform devicetrees. Further, a subsequent patch will introduce a
>new interrupts property for specifying SerIRQ behaviour, so convert
>before we do any further additions.
>
>Signed-off-by: Andrew Jeffery <andrew@aj.id.au>
>---
> .../bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml | 92 +++++++++++++++++++
> .../bindings/ipmi/aspeed-kcs-bmc.txt          | 33 -------
> 2 files changed, 92 insertions(+), 33 deletions(-)
> create mode 100644 Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
> delete mode 100644 Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt
>
>diff --git a/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
>new file mode 100644
>index 000000000000..697ca575454f
>--- /dev/null
>+++ b/Documentation/devicetree/bindings/ipmi/aspeed,ast2400-kcs-bmc.yaml
>@@ -0,0 +1,92 @@
>+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>+%YAML 1.2
>+---
>+$id: http://devicetree.org/schemas/ipmi/aspeed,ast2400-kcs-bmc.yaml
>+$schema: http://devicetree.org/meta-schemas/core.yaml
>+
>+title: ASPEED BMC KCS Devices
>+
>+maintainers:
>+  - Andrew Jeffery <andrew@aj.id.au>
>+
>+description: |
>+  The Aspeed BMC SoCs typically use the Keyboard-Controller-Style (KCS)
>+  interfaces on the LPC bus for in-band IPMI communication with their host.
>+
>+properties:
>+  compatible:
>+    oneOf:
>+      - description: Channel ID derived from reg
>+        items:
>+          enum:
>+            - aspeed,ast2400-kcs-bmc-v2
>+            - aspeed,ast2500-kcs-bmc-v2
>+            - aspeed,ast2600-kcs-bmc

Should this have a "-v2" suffix?

>+
>+      - description: Old-style with explicit channel ID, no reg
>+        deprecated: true
>+        items:
>+          enum:
>+            - aspeed,ast2400-kcs-bmc
>+            - aspeed,ast2500-kcs-bmc
>+
>+  interrupts:
>+    maxItems: 1
>+
>+  reg:
>+    # maxItems: 3
>+    items:
>+      - description: IDR register
>+      - description: ODR register
>+      - description: STR register
>+
>+  aspeed,lpc-io-reg:
>+    $ref: '/schemas/types.yaml#/definitions/uint32-array'
>+    minItems: 1
>+    maxItems: 2
>+    description: |
>+      The host CPU LPC IO data and status addresses for the device. For most
>+      channels the status address is derived from the data address, but the
>+      status address may be optionally provided.
>+
>+  kcs_chan:
>+    deprecated: true
>+    $ref: '/schemas/types.yaml#/definitions/uint32'
>+    description: The LPC channel number in the controller
>+
>+  kcs_addr:
>+    deprecated: true
>+    $ref: '/schemas/types.yaml#/definitions/uint32'
>+    description: The host CPU IO map address
>+
>+required:
>+  - compatible
>+  - interrupts
>+
>+additionalProperties: false
>+
>+allOf:
>+  - if:
>+      properties:
>+        compatible:
>+          contains:
>+            enum:
>+              - aspeed,ast2400-kcs-bmc
>+              - aspeed,ast2500-kcs-bmc
>+    then:
>+      required:
>+        - kcs_chan
>+        - kcs_addr
>+    else:
>+      required:
>+        - reg
>+        - aspeed,lpc-io-reg
>+
>+examples:
>+  - |
>+    kcs3: kcs@24 {
>+        compatible = "aspeed,ast2600-kcs-bmc";

And likewise here.

>+        reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
>+        aspeed,lpc-io-reg = <0xca2>;
>+        interrupts = <8>;
>+    };
>diff --git a/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt b/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt
>deleted file mode 100644
>index 193e71ca96b0..000000000000
>--- a/Documentation/devicetree/bindings/ipmi/aspeed-kcs-bmc.txt
>+++ /dev/null
>@@ -1,33 +0,0 @@
>-# Aspeed KCS (Keyboard Controller Style) IPMI interface
>-
>-The Aspeed SOCs (AST2400 and AST2500) are commonly used as BMCs
>-(Baseboard Management Controllers) and the KCS interface can be
>-used to perform in-band IPMI communication with their host.
>-
>-## v1
>-Required properties:
>-- compatible : should be one of
>-    "aspeed,ast2400-kcs-bmc"
>-    "aspeed,ast2500-kcs-bmc"
>-- interrupts : interrupt generated by the controller
>-- kcs_chan : The LPC channel number in the controller
>-- kcs_addr : The host CPU IO map address
>-
>-## v2
>-Required properties:
>-- compatible : should be one of
>-    "aspeed,ast2400-kcs-bmc-v2"
>-    "aspeed,ast2500-kcs-bmc-v2"
>-- reg : The address and size of the IDR, ODR and STR registers
>-- interrupts : interrupt generated by the controller
>-- aspeed,lpc-io-reg : The host CPU LPC IO address for the device
>-
>-Example:
>-
>-    kcs3: kcs@24 {
>-        compatible = "aspeed,ast2500-kcs-bmc-v2";
>-        reg = <0x24 0x1>, <0x30 0x1>, <0x3c 0x1>;
>-        aspeed,lpc-reg = <0xca2>;
>-        interrupts = <8>;
>-        status = "okay";
>-    };
>-- 
>2.27.0
>
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