[03/14] dt-bindings: reset: Add reset controller for i.MX8QM and i.MX8QXP

Commit Message

Frank Li Jan. 31, 2025, 9:33 p.m. UTC

Add binding doc for reset controller of i.MX8QM and i.MX8QXP, which use
System Controller Firmware(SCU) reset some peripherals, such as CSI.

Signed-off-by: Frank Li <[e-mail]>
---
 .../devicetree/bindings/reset/fsl,imx-scu.yaml     | 35 ++++++++++++++++++++++
 1 file changed, 35 insertions(+)

Comments

Rob Herring Feb. 3, 2025, 10:06 p.m. UTC | #1

On Fri, Jan 31, 2025 at 04:33:48PM -0500, Frank Li wrote:
> Add binding doc for reset controller of i.MX8QM and i.MX8QXP, which use
> System Controller Firmware(SCU) reset some peripherals, such as CSI.
> 
> Signed-off-by: Frank Li <[e-mail]>
> ---
>  .../devicetree/bindings/reset/fsl,imx-scu.yaml     | 35 ++++++++++++++++++++++
>  1 file changed, 35 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/reset/fsl,imx-scu.yaml b/Documentation/devicetree/bindings/reset/fsl,imx-scu.yaml
> new file mode 100644
> index 0000000000000..6046df8723262
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/reset/fsl,imx-scu.yaml
> @@ -0,0 +1,35 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/reset/fsl,imx-scu.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Freescale i.MX8 SCU Reset
> +
> +maintainers:
> +  - Frank Li <[e-mail]>
> +
> +description:
> +  i.MX8QM and i.MX8QXP System Controller Firmware(SCU) provide reset for
> +  some peripheral.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - fsl,imx-scu-reset
> +
> +  '#reset-cells':
> +    const: 1
> +
> +required:
> +  - compatible
> +  - '#reset-cells'
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    reset-controller {
> +        compatible = "fsl,imx-scu-reset";
> +        #reset-cells = <1>;

This should just be a property in the parent SCU node. You don't need a 
node for every provider.

We need a binding for the SCU as a whole.

Rob

Patch

diff --git a/Documentation/devicetree/bindings/reset/fsl,imx-scu.yaml b/Documentation/devicetree/bindings/reset/fsl,imx-scu.yaml
new file mode 100644
index 0000000000000..6046df8723262
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/fsl,imx-scu.yaml
@@ -0,0 +1,35 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/reset/fsl,imx-scu.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Freescale i.MX8 SCU Reset
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+description:
+  i.MX8QM and i.MX8QXP System Controller Firmware(SCU) provide reset for
+  some peripheral.
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx-scu-reset
+
+  '#reset-cells':
+    const: 1
+
+required:
+  - compatible
+  - '#reset-cells'
+
+additionalProperties: false
+
+examples:
+  - |
+    reset-controller {
+        compatible = "fsl,imx-scu-reset";
+        #reset-cells = <1>;
+    };