dt-bindings: Add bindings for peci-npcm

Add device tree bindings for the peci-npcm controller driver.

Signed-off-by: Tomer Maimon <tmaimon77@gmail.com>
Signed-off-by: Tyrone Ting <warp5tw@gmail.com>
Co-developed-by: Iwona Winiarska <iwona.winiarska@intel.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Iwona Winiarska <iwona.winiarska@intel.com>
Link: https://lore.kernel.org/r/20230727202126.1477515-2-iwona.winiarska@intel.com

diff --git a/Documentation/devicetree/bindings/peci/nuvoton,npcm-peci.yaml b/Documentation/devicetree/bindings/peci/nuvoton,npcm-peci.yaml
new file mode 100644 (file)
index 0000000..087e02a
--- /dev/null
+++ b/Documentation/devicetree/bindings/peci/nuvoton,npcm-peci.yaml
@@ -0,0 +1,56 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/peci/nuvoton,npcm-peci.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Nuvoton PECI Bus
+
+maintainers:
+  - Tomer Maimon <tmaimon77@gmail.com>
+
+allOf:
+  - $ref: peci-controller.yaml#
+
+properties:
+  compatible:
+    enum:
+      - nuvoton,npcm750-peci
+      - nuvoton,npcm845-peci
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  clocks:
+    description:
+      Clock source for PECI controller. Should reference the APB clock.
+    maxItems: 1
+
+  cmd-timeout-ms:
+    minimum: 1
+    maximum: 1000
+    default: 1000
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/nuvoton,npcm7xx-clock.h>
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    peci-controller@f0100000 {
+      compatible = "nuvoton,npcm750-peci";
+      reg = <0xf0100000 0x200>;
+      interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
+      clocks = <&clk NPCM7XX_CLK_APB3>;
+      cmd-timeout-ms = <1000>;
+    };
+...