Added device tree binding documentation for Nuvoton BMC NPCM BIOS Post
Code (BPC).

The NPCM BPC monitoring two configurable I/O addresses written by the
host on the bus.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
---
 .../soc/nuvoton/nuvoton,npcm-bpc.yaml         | 65 +++++++++++++++++++
 1 file changed, 65 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml

diff --git a/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml b/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml
new file mode 100644
index 000000000000..c04302a1d52b
--- /dev/null
+++ b/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml
@@ -0,0 +1,65 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/soc/nuvoton/nuvoton,npcm-bpc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton BMC NPCM BIOS Post Code (BPC) controller
+
+maintainers:
+  - Tomer Maimon <tmaimon77@gmail.com>
+
+description:
+  Nuvoton BMC NPCM BIOS Post Code (BPC) monitoring two configurable I/O
+  addresses written by the host on the bus, the capture data stored in
+  128-word FIFO.
+
+  NPCM BPC supports capture double words, when using capture
+  double word only I/O address 1 is monitored.
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - nuvoton,npcm845-bpc
+          - nuvoton,npcm750-bpc
+      - const: nuvoton,npcm-bpc
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  nuvoton,monitor-ports:
+    $ref: /schemas/types.yaml#/definitions/uint32-array
+    description:
+      Contain monitor I/O addresses on the bus, at least one monitor I/O
+      address required.
+
+  nuvoton,bpc-en-dwcapture:
+    description:
+      Set DWCAPTURE bit in BPCFEN register that enable double words capture
+      according to the first address setting.
+    type: boolean
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - nuvoton,monitor-ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+    bpc: bpc@f0007040 {
+        compatible = "nuvoton,npcm750-bpc", "nuvoton,npcm-bpc";
+        reg = <0xf0007040 0x20>;
+        interrupts = <GIC_SPI 9 IRQ_TYPE_LEVEL_HIGH>;
+        nuvoton,monitor-ports = <0x80>;
+    };
+...
-- 
2.34.1

On 13/12/2023 20:05, Tomer Maimon wrote:
> Added device tree binding documentation for Nuvoton BMC NPCM BIOS Post
> Code (BPC).
> 
> The NPCM BPC monitoring two configurable I/O addresses written by the
> host on the bus.
> 
> Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
> ---
>  .../soc/nuvoton/nuvoton,npcm-bpc.yaml         | 65 +++++++++++++++++++
>  1 file changed, 65 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml
> 
> diff --git a/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml b/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml
> new file mode 100644
> index 000000000000..c04302a1d52b
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/soc/nuvoton/nuvoton,npcm-bpc.yaml
> @@ -0,0 +1,65 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/soc/nuvoton/nuvoton,npcm-bpc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Nuvoton BMC NPCM BIOS Post Code (BPC) controller
> +
> +maintainers:
> +  - Tomer Maimon <tmaimon77@gmail.com>
> +
> +description:
> +  Nuvoton BMC NPCM BIOS Post Code (BPC) monitoring two configurable I/O
> +  addresses written by the host on the bus, the capture data stored in
> +  128-word FIFO.
> +
> +  NPCM BPC supports capture double words, when using capture
> +  double word only I/O address 1 is monitored.
> +
> +properties:
> +  compatible:
> +    items:
> +      - enum:
> +          - nuvoton,npcm845-bpc
> +          - nuvoton,npcm750-bpc
> +      - const: nuvoton,npcm-bpc

That's not what I suggested. I asked to make 845 compatible with 750.
This works, but I want to be sure you really, really understand the
consequences of this.

> +
> +  reg:
> +    maxItems: 1
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  nuvoton,monitor-ports:
> +    $ref: /schemas/types.yaml#/definitions/uint32-array

Missing constraints, like min/maxItems and maybe values.

> +    description:
> +      Contain monitor I/O addresses on the bus, at least one monitor I/O
> +      address required.
> +
> +  nuvoton,bpc-en-dwcapture:

nuvoton,double-word-capture?

> +    description:
> +      Set DWCAPTURE bit in BPCFEN register that enable double words capture
> +      according to the first address setting.
> +    type: boolean
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - nuvoton,monitor-ports

Best regards,
Krzysztof