[v2,3/4] dt-bindings: irqchip: imx mu work as msi controller

Commit Message

Frank Li July 15, 2022, 7:22 p.m. UTC

imx mu support generate irq by write a register.
provide msi controller support so other driver
can use it by standard msi interface.

Signed-off-by: Frank Li <[e-mail]>
---
 .../interrupt-controller/fsl,mu-msi.yaml      | 88 +++++++++++++++++++
 1 file changed, 88 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.yaml

Comments

Rob Herring July 15, 2022, 11:06 p.m. UTC | #1

On Fri, 15 Jul 2022 14:22:18 -0500, Frank Li wrote:
> imx mu support generate irq by write a register.
> provide msi controller support so other driver
> can use it by standard msi interface.
> 
> Signed-off-by: Frank Li <[e-mail]>
> ---
>  .../interrupt-controller/fsl,mu-msi.yaml      | 88 +++++++++++++++++++
>  1 file changed, 88 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.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:
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.example.dtb: interrupt-controller@5d270000: '#interrupt-cells' is a dependency of 'interrupt-controller'
	From schema: /builds/robherring/linux-dt-review/Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.yaml
/builds/robherring/linux-dt-review/Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.example.dtb: interrupt-controller@5d270000: '#interrupt-cells' is a dependency of 'interrupt-controller'
	From schema: /usr/local/lib/python3.10/dist-packages/dtschema/schemas/interrupt-controller.yaml

doc reference errors (make refcheckdocs):

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

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.

Patch

diff --git a/Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.yaml b/Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.yaml
new file mode 100644
index 0000000000000..732ce770ac3bd
--- /dev/null
+++ b/Documentation/devicetree/bindings/interrupt-controller/fsl,mu-msi.yaml
@@ -0,0 +1,88 @@ 
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/interrupt-controller/fsl,mu-msi.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: NXP i.MX Messaging Unit (MU) work as msi controller
+
+maintainers:
+  - Frank Li <[e-mail]>
+
+description: |
+  The Messaging Unit module enables two processors within the SoC to
+  communicate and coordinate by passing messages (e.g. data, status
+  and control) through the MU interface. The MU also provides the ability
+  for one processor to signal the other processor using interrupts.
+
+  Because the MU manages the messaging between processors, the MU uses
+  different clocks (from each side of the different peripheral buses).
+  Therefore, the MU must synchronize the accesses from one side to the
+  other. The MU accomplishes synchronization using two sets of matching
+  registers (Processor A-facing, Processor B-facing).
+
+  MU can work as msi interrupt controller to do doorbell
+
+allOf:
+  - $ref: /schemas/interrupt-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - fsl,imx6sx-mu-msi
+      - fsl,imx7ulp-mu-msi
+      - fsl,imx8ulp-mu-msi
+      - fsl,imx8ulp-mu-msi-s4
+
+  reg:
+    minItems: 2
+
+  reg-names:
+    items:
+      - const: a
+      - const: b
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    maxItems: 1
+
+  power-domains:
+    maxItems: 2
+
+  power-domain-names:
+    items:
+      - const: a
+      - const: b
+
+  interrupt-controller: true
+
+  msi-controller: true
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - msi-controller
+  - interrupt-controller
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/firmware/imx/rsrc.h>
+
+    lsio_mu12: interrupt-controller@5d270000 {
+        compatible = "fsl,imx6sx-mu-msi";
+        msi-controller;
+        interrupt-controller;
+        reg = <0x5d270000 0x10000>,     /* A side */
+              <0x5d300000 0x10000>;     /* B side */
+        reg-names = "a", "b";
+        interrupts = <GIC_SPI 191 IRQ_TYPE_LEVEL_HIGH>;
+        power-domains = <&pd IMX_SC_R_MU_12A>,
+                        <&pd IMX_SC_R_MU_12B>;
+        power-domain-names = "a", "b";
+    };