diff mbox series

[2/2] dt-bindings: nvmem: cells: add MAC address cell

Message ID 20220125180114.12286-3-zajec5@gmail.com
State New
Headers show
Series None | expand

Commit Message

Rafał Miłecki Jan. 25, 2022, 6:01 p.m. UTC
From: Rafał Miłecki <rafal@milecki.pl>

This adds support for describing details of NVMEM cell containing MAC
address. Those are often device specific and could be nicely stored in
DT.

Initial documentation includes support for describing:
1. Cell data format (e.g. Broadcom's NVRAM uses ASCII to store MAC)
2. Reversed bytes flash (required for i.MX6/i.MX7 OCOTP support)
3. Source for multiple addresses (very common in home routers)

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
---
 .../bindings/nvmem/cells/mac-address.yaml     | 94 +++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml

Comments

Rob Herring (Arm) Jan. 26, 2022, 3:29 a.m. UTC | #1
On Tue, 25 Jan 2022 19:01:14 +0100, Rafał Miłecki wrote:
> From: Rafał Miłecki <rafal@milecki.pl>
> 
> This adds support for describing details of NVMEM cell containing MAC
> address. Those are often device specific and could be nicely stored in
> DT.
> 
> Initial documentation includes support for describing:
> 1. Cell data format (e.g. Broadcom's NVRAM uses ASCII to store MAC)
> 2. Reversed bytes flash (required for i.MX6/i.MX7 OCOTP support)
> 3. Source for multiple addresses (very common in home routers)
> 
> Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
> ---
>  .../bindings/nvmem/cells/mac-address.yaml     | 94 +++++++++++++++++++
>  1 file changed, 94 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml
> 

My bot found errors running 'make DT_CHECKER_FLAGS=-m dt_binding_check'
on your patch (DT_CHECKER_FLAGS is new in v5.13):

yamllint warnings/errors:

dtschema/dtc warnings/errors:
schemas/nvmem/cells/cell.yaml: ignoring, error parsing file
make[1]: *** Deleting file 'Documentation/devicetree/bindings/nvmem/cells/mac-address.example.dt.yaml'
schemas/nvmem/cells/cell.yaml: ignoring, error parsing file
Traceback (most recent call last):
  File "/usr/local/bin/dt-validate", line 170, in <module>
    sg.check_trees(filename, testtree)
  File "/usr/local/bin/dt-validate", line 119, in check_trees
    self.check_subtree(dt, subtree, False, "/", "/", filename)
  File "/usr/local/bin/dt-validate", line 110, in check_subtree
    self.check_subtree(tree, value, disabled, name, fullname + name, filename)
  File "/usr/local/bin/dt-validate", line 110, in check_subtree
    self.check_subtree(tree, value, disabled, name, fullname + name, filename)
  File "/usr/local/bin/dt-validate", line 110, in check_subtree
    self.check_subtree(tree, value, disabled, name, fullname + name, filename)
  [Previous line repeated 1 more time]
  File "/usr/local/bin/dt-validate", line 105, in check_subtree
    self.check_node(tree, subtree, disabled, nodename, fullname, filename)
  File "/usr/local/bin/dt-validate", line 49, in check_node
    errors = sorted(dtschema.DTValidator(schema).iter_errors(node), key=lambda e: e.linecol)
  File "/usr/local/lib/python3.8/dist-packages/dtschema/lib.py", line 771, in iter_errors
    for error in super().iter_errors(instance, _schema):
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/validators.py", line 229, in iter_errors
    for error in errors:
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/_validators.py", line 362, in allOf
    yield from validator.descend(instance, subschema, schema_path=index)
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/validators.py", line 245, in descend
    for error in self.evolve(schema=schema).iter_errors(instance):
  File "/usr/local/lib/python3.8/dist-packages/dtschema/lib.py", line 771, in iter_errors
    for error in super().iter_errors(instance, _schema):
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/validators.py", line 229, in iter_errors
    for error in errors:
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/_validators.py", line 298, in ref
    yield from validator.descend(instance, resolved)
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/validators.py", line 245, in descend
    for error in self.evolve(schema=schema).iter_errors(instance):
  File "/usr/local/lib/python3.8/dist-packages/dtschema/lib.py", line 771, in iter_errors
    for error in super().iter_errors(instance, _schema):
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/validators.py", line 219, in iter_errors
    scope = id_of(_schema)
  File "/usr/local/lib/python3.8/dist-packages/jsonschema/validators.py", line 96, in _id_of
    return schema.get("$id", "")
AttributeError: 'NoneType' object has no attribute 'get'
make[1]: *** [scripts/Makefile.lib:378: Documentation/devicetree/bindings/nvmem/cells/mac-address.example.dt.yaml] Error 1
make[1]: *** Waiting for unfinished jobs....
make: *** [Makefile:1398: dt_binding_check] Error 2

doc reference errors (make refcheckdocs):

See https://patchwork.ozlabs.org/patch/1584227

This check can fail if there are any dependencies. The base for a patch
series is generally the most recent rc1.

If you already ran 'make dt_binding_check' and didn't see the above
error(s), then make sure 'yamllint' is installed and dt-schema is up to
date:

pip3 install dtschema --upgrade

Please check and re-submit.
diff mbox series

Patch

diff --git a/Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml b/Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml
new file mode 100644
index 000000000000..f8d19e87cdf0
--- /dev/null
+++ b/Documentation/devicetree/bindings/nvmem/cells/mac-address.yaml
@@ -0,0 +1,94 @@ 
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/nvmem/cells/mac-address.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NVMEM cell containing a MAC address
+
+maintainers:
+  - Rafał Miłecki <rafal@milecki.pl>
+
+properties:
+  compatible:
+    const: mac-address
+
+  format:
+    description: |
+      Some NVMEM cells contain MAC in a non-binary format.
+
+      ASCII should be specified if MAC is string formatted like:
+      - "01:23:45:67:89:AB" (30 31 3a 32 33 3a 34 35 3a 36 37 3a 38 39 3a 41 42)
+      - "01-23-45-67-89-AB"
+      - "0123456789AB"
+    enum:
+      - ascii
+
+  reversed-bytes:
+    type: boolean
+    description: |
+      MAC is stored in reversed bytes order. Example:
+      Stored value: AB 89 67 45 23 01
+      Actual MAC: 01 23 45 67 89 AB
+
+  base-address:
+    type: boolean
+    description: |
+      Marks NVMEM cell as provider of multiple addresses that are relative to
+      the one actually stored physically. Respective addresses can be requested
+      by specifying cell index of NVMEM cell.
+
+allOf:
+  - $ref: cell.yaml#
+  - if:
+      required:
+        - base-address
+    then:
+      properties:
+        "#nvmem-cell-cells":
+          const: 1
+      required:
+        - "#nvmem-cell-cells"
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    partitions {
+        compatible = "fixed-partitions";
+        #address-cells = <1>;
+        #size-cells = <1>;
+
+        partition@f00000 {
+            compatible = "nvmem-cells";
+            label = "calibration";
+            reg = <0xf00000 0x100000>;
+            ranges = <0 0xf00000 0x100000>;
+            #address-cells = <1>;
+            #size-cells = <1>;
+
+            mac@100 {
+                compatible = "mac-address";
+                reg = <0x100 0x6>;
+            };
+
+            mac@200 {
+                compatible = "mac-address";
+                reg = <0x200 0x6>;
+                reversed-bytes;
+            };
+
+            mac@300 {
+                compatible = "mac-address";
+                reg = <0x300 0x11>;
+                format = "ascii";
+            };
+
+            mac@400 {
+                compatible = "mac-address";
+                reg = <0x400 0x6>;
+                base-address;
+                #nvmem-cell-cells = <1>;
+            };
+        };
+    };