From 084d01a173f5f41afd326b1dfe73085972530ca7 Mon Sep 17 00:00:00 2001
From: Yao Zi <ziyao@disroot.org>
Date: Thu, 4 Sep 2025 01:34:36 +0000
Subject: [PATCH] dt-bindings: gpio: loongson: Document GPIO controller of
 LS2K0300 SoC

Loongson-2K0300 ships a GPIO controller whose input/output control logic
is similar to previous generation of SoCs. Additionally, it acts as an
interrupt-controller supporting both level and edge interrupts and has a
distinct reset signal.

Describe its compatible in devicetree. We enlarge the maximum value of
ngpios to 128, since the controller technically supports at most 128
pins, although only 106 are routed out of the package. Properties for
interrupt-controllers and resets are introduced and limited as LS2K0300
only.

Signed-off-by: Yao Zi <ziyao@disroot.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: Huacai Chen <chenhuacai@loongson.cn>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20250904013438.2405-2-ziyao@disroot.org
Signed-off-by: Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
---
 .../bindings/gpio/loongson,ls-gpio.yaml       | 28 ++++++++++++++++++-
 1 file changed, 27 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml b/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml
index b68159600e2bd..69852444df239 100644
--- a/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml
@@ -14,6 +14,7 @@ properties:
     oneOf:
       - enum:
           - loongson,ls2k-gpio
+          - loongson,ls2k0300-gpio
           - loongson,ls2k0500-gpio0
           - loongson,ls2k0500-gpio1
           - loongson,ls2k2000-gpio0
@@ -36,7 +37,7 @@ properties:
 
   ngpios:
     minimum: 1
-    maximum: 64
+    maximum: 128
 
   "#gpio-cells":
     const: 2
@@ -49,6 +50,14 @@ properties:
     minItems: 1
     maxItems: 64
 
+  "#interrupt-cells":
+    const: 2
+
+  interrupt-controller: true
+
+  resets:
+    maxItems: 1
+
 required:
   - compatible
   - reg
@@ -58,6 +67,23 @@ required:
   - gpio-ranges
   - interrupts
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: loongson,ls2k0300-gpio
+    then:
+      required:
+        - "#interrupt-cells"
+        - interrupt-controller
+        - resets
+    else:
+      properties:
+        "#interrupts-cells": false
+        interrupt-controller: false
+        resets: false
+
 additionalProperties: false
 
 examples:
-- 
2.47.3