[v3,01/40] dt-bindings: input: gpio-keys: enforce node names to match all properties

Commit Message

Krzysztof Kozlowski June 16, 2022, 12:52 a.m. UTC

The gpio-keys DT schema matches all properties with a wide pattern and
applies specific schema to children.  This has drawback - all regular
properties are also matched and are silently ignored, even if they are
not described in schema.  Basically this allows any non-object property
to be present.

Enforce specific naming pattern for children (keys) to narrow the
pattern thus do not match other properties.  This will require all
children to be properly prefixed or suffixed (button, event, switch or
key).

Removal of "if:" within patternProperties causes drop of one indentation
level, but there are no other changes in the affected block.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>
---
 .../devicetree/bindings/input/gpio-keys.yaml  | 157 +++++++++---------
 1 file changed, 77 insertions(+), 80 deletions(-)

Comments

Krzysztof Kozlowski June 27, 2022, 8:17 a.m. UTC | #1

On 16/06/2022 02:52, Krzysztof Kozlowski wrote:
> The gpio-keys DT schema matches all properties with a wide pattern and
> applies specific schema to children.  This has drawback - all regular
> properties are also matched and are silently ignored, even if they are
> not described in schema.  Basically this allows any non-object property
> to be present.
> 
> Enforce specific naming pattern for children (keys) to narrow the
> pattern thus do not match other properties.  This will require all
> children to be properly prefixed or suffixed (button, event, switch or
> key).
> 
> Removal of "if:" within patternProperties causes drop of one indentation
> level, but there are no other changes in the affected block.
> 
> Signed-off-by: Krzysztof Kozlowski <[e-mail]>
> Reviewed-by: Rob Herring <[e-mail]>
> ---
>  .../devicetree/bindings/input/gpio-keys.yaml  | 157 +++++++++---------
>  1 file changed, 77 insertions(+), 80 deletions(-)
> 

Dmitry,

Any comments from your side? Are you planning to pick up the dt-bindings
here (patch 1-3)?

Best regards,
Krzysztof

Krzysztof Kozlowski July 5, 2022, 11:39 a.m. UTC | #2

On 27/06/2022 10:17, Krzysztof Kozlowski wrote:
> On 16/06/2022 02:52, Krzysztof Kozlowski wrote:
>> The gpio-keys DT schema matches all properties with a wide pattern and
>> applies specific schema to children.  This has drawback - all regular
>> properties are also matched and are silently ignored, even if they are
>> not described in schema.  Basically this allows any non-object property
>> to be present.
>>
>> Enforce specific naming pattern for children (keys) to narrow the
>> pattern thus do not match other properties.  This will require all
>> children to be properly prefixed or suffixed (button, event, switch or
>> key).
>>
>> Removal of "if:" within patternProperties causes drop of one indentation
>> level, but there are no other changes in the affected block.
>>
>> Signed-off-by: Krzysztof Kozlowski <[e-mail]>
>> Reviewed-by: Rob Herring <[e-mail]>
>> ---
>>  .../devicetree/bindings/input/gpio-keys.yaml  | 157 +++++++++---------
>>  1 file changed, 77 insertions(+), 80 deletions(-)
>>
> 
> Dmitry,
> 
> Any comments from your side? Are you planning to pick up the dt-bindings
> here (patch 1-3)?

Hmmm, I guess this should go via dt-bindings then...

Best regards,
Krzysztof

Patch

diff --git a/Documentation/devicetree/bindings/input/gpio-keys.yaml b/Documentation/devicetree/bindings/input/gpio-keys.yaml
index 645dfa1e0d07..27bb5c6ab8d9 100644
--- a/Documentation/devicetree/bindings/input/gpio-keys.yaml
+++ b/Documentation/devicetree/bindings/input/gpio-keys.yaml
@@ -16,86 +16,83 @@  properties:
       - gpio-keys-polled
 
 patternProperties:
-  ".*":
-    if:
-      type: object
-    then:
-      $ref: input.yaml#
-
-      properties:
-        gpios:
-          maxItems: 1
-
-        interrupts:
-          maxItems: 1
-
-        label:
-          description: Descriptive name of the key.
-
-        linux,code:
-          description: Key / Axis code to emit.
-
-        linux,input-type:
-          default: 1  # EV_KEY
-
-        linux,input-value:
-          description: |
-            If linux,input-type is EV_ABS or EV_REL then this
-            value is sent for events this button generates when pressed.
-            EV_ABS/EV_REL axis will generate an event with a value of 0
-            when all buttons with linux,input-type == type and
-            linux,code == axis are released. This value is interpreted
-            as a signed 32 bit value, e.g. to make a button generate a
-            value of -1 use:
-
-            linux,input-value = <0xffffffff>; /* -1 */
-
-          $ref: /schemas/types.yaml#/definitions/uint32
-
-        debounce-interval:
-          description:
-            Debouncing interval time in milliseconds. If not specified defaults to 5.
-          $ref: /schemas/types.yaml#/definitions/uint32
-
-          default: 5
-
-        wakeup-source:
-          description: Button can wake-up the system.
-
-        wakeup-event-action:
-          description: |
-            Specifies whether the key should wake the system when asserted, when
-            deasserted, or both. This property is only valid for keys that wake up the
-            system (e.g., when the "wakeup-source" property is also provided).
-
-            Supported values are defined in linux-event-codes.h:
-
-              EV_ACT_ANY        - both asserted and deasserted
-              EV_ACT_ASSERTED   - asserted
-              EV_ACT_DEASSERTED - deasserted
-          $ref: /schemas/types.yaml#/definitions/uint32
-          enum: [0, 1, 2]
-
-        linux,can-disable:
-          description:
-            Indicates that button is connected to dedicated (not shared) interrupt
-            which can be disabled to suppress events from the button.
-          type: boolean
-
-      required:
-        - linux,code
-
-      anyOf:
-        - required:
-            - interrupts
-        - required:
-            - gpios
-
-      dependencies:
-        wakeup-event-action: [ wakeup-source ]
-        linux,input-value: [ gpios ]
-
-      unevaluatedProperties: false
+  "^(button|event|key|switch|(button|event|key|switch)-[a-z0-9-]+|[a-z0-9-]+-(button|event|key|switch))$":
+    $ref: input.yaml#
+
+    properties:
+      gpios:
+        maxItems: 1
+
+      interrupts:
+        maxItems: 1
+
+      label:
+        description: Descriptive name of the key.
+
+      linux,code:
+        description: Key / Axis code to emit.
+
+      linux,input-type:
+        default: 1  # EV_KEY
+
+      linux,input-value:
+        description: |
+          If linux,input-type is EV_ABS or EV_REL then this
+          value is sent for events this button generates when pressed.
+          EV_ABS/EV_REL axis will generate an event with a value of 0
+          when all buttons with linux,input-type == type and
+          linux,code == axis are released. This value is interpreted
+          as a signed 32 bit value, e.g. to make a button generate a
+          value of -1 use:
+
+          linux,input-value = <0xffffffff>; /* -1 */
+
+        $ref: /schemas/types.yaml#/definitions/uint32
+
+      debounce-interval:
+        description:
+          Debouncing interval time in milliseconds. If not specified defaults to 5.
+        $ref: /schemas/types.yaml#/definitions/uint32
+
+        default: 5
+
+      wakeup-source:
+        description: Button can wake-up the system.
+
+      wakeup-event-action:
+        description: |
+          Specifies whether the key should wake the system when asserted, when
+          deasserted, or both. This property is only valid for keys that wake up the
+          system (e.g., when the "wakeup-source" property is also provided).
+
+          Supported values are defined in linux-event-codes.h:
+
+            EV_ACT_ANY        - both asserted and deasserted
+            EV_ACT_ASSERTED   - asserted
+            EV_ACT_DEASSERTED - deasserted
+        $ref: /schemas/types.yaml#/definitions/uint32
+        enum: [0, 1, 2]
+
+      linux,can-disable:
+        description:
+          Indicates that button is connected to dedicated (not shared) interrupt
+          which can be disabled to suppress events from the button.
+        type: boolean
+
+    required:
+      - linux,code
+
+    anyOf:
+      - required:
+          - interrupts
+      - required:
+          - gpios
+
+    dependencies:
+      wakeup-event-action: [ wakeup-source ]
+      linux,input-value: [ gpios ]
+
+    unevaluatedProperties: false
 
 if:
   properties: