From: Peng Fan <peng.fan@nxp.com>

i.MX95 Pinctrl is managed by System Control Management Interface(SCMI)
firmware using OEM extensions. No functions, no groups are provided by
the firmware. To reuse generic properties, add the binding to enable
pinmux, slew-rate, bias-pull-up and etc, under a subnode of '-pins'.

Signed-off-by: Peng Fan <peng.fan@nxp.com>
---
 .../devicetree/bindings/firmware/arm,scmi.yaml     |  9 ++++--
 .../bindings/firmware/nxp,imx95-scmi-pinctrl.yaml  | 37 ++++++++++++++++++++++
 2 files changed, 43 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
index 7de2c29606e5..bd4dfd7a85cd 100644
--- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
+++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
@@ -262,9 +262,12 @@ properties:
     patternProperties:
       '-pins$':
         type: object
-        allOf:
-          - $ref: /schemas/pinctrl/pincfg-node.yaml#
-          - $ref: /schemas/pinctrl/pinmux-node.yaml#
+        anyOf:
+          - $ref: /schemas/firmware/nxp,imx95-scmi-pinctrl.yaml
+          - allOf:
+              - $ref: /schemas/pinctrl/pincfg-node.yaml#
+              - $ref: /schemas/pinctrl/pinmux-node.yaml#
+
         unevaluatedProperties: false
 
         description:
diff --git a/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml
new file mode 100644
index 000000000000..1a694881f193
--- /dev/null
+++ b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml
@@ -0,0 +1,37 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+# Copyright 2024 NXP
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/firmware/nxp,imx95-scmi-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: i.MX System Control and Management Interface (SCMI) Pinctrl Protocol
+
+maintainers:
+  - Peng Fan <peng.fan@nxp.com>
+
+patternProperties:
+  'grp[0-9a-f]$':
+    type: object
+    unevaluatedProperties: false
+
+    properties:
+      pinmux:
+        description: |
+          An integer array for representing pinmux configurations of
+          a device. Each integer has the format, pinid[31:21], mux[20:16],
+          daisy_value[15:12], daisy_valid[11:11], daisy_id[10:0].
+        $ref: /schemas/types.yaml#/definitions/uint32-array
+
+      drive-strength:
+        enum: [ 0, 1, 3, 7, 15, 31, 63 ]
+
+      slew-rate:
+        enum: [2, 3]
+
+      input-schmitt-enable: true
+      drive-open-drain: true
+      bias-pull-up: true
+      bias-pull-down: true
+
+additionalProperties: true

-- 
2.37.1

On Sun, May 05, 2024 at 11:47:17AM +0800, Peng Fan (OSS) wrote:
> From: Peng Fan <peng.fan@nxp.com>
> 
> i.MX95 Pinctrl is managed by System Control Management Interface(SCMI)
> firmware using OEM extensions. No functions, no groups are provided by
> the firmware. To reuse generic properties, add the binding to enable
> pinmux, slew-rate, bias-pull-up and etc, under a subnode of '-pins'.
> 
> Signed-off-by: Peng Fan <peng.fan@nxp.com>
> ---
>  .../devicetree/bindings/firmware/arm,scmi.yaml     |  9 ++++--
>  .../bindings/firmware/nxp,imx95-scmi-pinctrl.yaml  | 37 ++++++++++++++++++++++
>  2 files changed, 43 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
> index 7de2c29606e5..bd4dfd7a85cd 100644
> --- a/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
> +++ b/Documentation/devicetree/bindings/firmware/arm,scmi.yaml
> @@ -262,9 +262,12 @@ properties:
>      patternProperties:
>        '-pins$':
>          type: object
> -        allOf:
> -          - $ref: /schemas/pinctrl/pincfg-node.yaml#
> -          - $ref: /schemas/pinctrl/pinmux-node.yaml#
> +        anyOf:
> +          - $ref: /schemas/firmware/nxp,imx95-scmi-pinctrl.yaml
> +          - allOf:
> +              - $ref: /schemas/pinctrl/pincfg-node.yaml#
> +              - $ref: /schemas/pinctrl/pinmux-node.yaml#
> +
>          unevaluatedProperties: false
>  
>          description:
> diff --git a/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml
> new file mode 100644
> index 000000000000..1a694881f193
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/firmware/nxp,imx95-scmi-pinctrl.yaml
> @@ -0,0 +1,37 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2024 NXP
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/firmware/nxp,imx95-scmi-pinctrl.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: i.MX System Control and Management Interface (SCMI) Pinctrl Protocol
> +
> +maintainers:
> +  - Peng Fan <peng.fan@nxp.com>
> +
> +patternProperties:
> +  'grp[0-9a-f]$':
> +    type: object
> +    unevaluatedProperties: false
> +
> +    properties:
> +      pinmux:
> +        description: |
> +          An integer array for representing pinmux configurations of
> +          a device. Each integer has the format, pinid[31:21], mux[20:16],
> +          daisy_value[15:12], daisy_valid[11:11], daisy_id[10:0].

I would format this with one field per line. Otherwise,

Reviewed-by: Rob Herring <robh@kernel.org>

> +        $ref: /schemas/types.yaml#/definitions/uint32-array
> +
> +      drive-strength:
> +        enum: [ 0, 1, 3, 7, 15, 31, 63 ]
> +
> +      slew-rate:
> +        enum: [2, 3]
> +
> +      input-schmitt-enable: true
> +      drive-open-drain: true
> +      bias-pull-up: true
> +      bias-pull-down: true
> +
> +additionalProperties: true
> 
> -- 
> 2.37.1
>