[PATCH v2 1/2] gpio: dt-bindings: add parsing of loongson gpio offset

[Yinbo Zhu <zhuyinbo@xxxxxxxxxxx>]

Add parsing GPIO configure, input, output, interrupt register offset
address and GPIO control mode support.

Signed-off-by: Yinbo Zhu <zhuyinbo@xxxxxxxxxxx>
---
 .../bindings/gpio/loongson,ls-gpio.yaml       | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml b/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml
index fb86e8ce6349..cad67f8bfe6e 100644
--- a/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml
+++ b/Documentation/devicetree/bindings/gpio/loongson,ls-gpio.yaml
@@ -29,6 +29,33 @@ properties:
 
   gpio-ranges: true
 
+  loongson,gpio-conf-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      This option indicate this GPIO configuration register offset address.
+
+  loongson,gpio-out-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      This option indicate this GPIO output register offset address.
+
+  loongson,gpio-in-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      This option indicate this GPIO input register offset address.
+
+  loongson,gpio-ctrl-mode:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      This option indicate this GPIO control mode, where '0' represents
+      bit control mode and '1' represents byte control mode.
+
+  loongson,gpio-inten-offset:
+    $ref: /schemas/types.yaml#/definitions/uint32
+    description:
+      This option indicate this GPIO interrupt enable register offset
+      address.
+
   interrupts:
     minItems: 1
     maxItems: 64
@@ -39,6 +66,11 @@ required:
   - ngpios
   - "#gpio-cells"
   - gpio-controller
+  - loongson,gpio-conf-offset
+  - loongson,gpio-in-offset
+  - loongson,gpio-out-offset
+  - loongson,gpio-ctrl-mode
+  - loongson,gpio-inten-offset
   - gpio-ranges
   - interrupts
 
@@ -54,6 +86,11 @@ examples:
       ngpios = <64>;
       #gpio-cells = <2>;
       gpio-controller;
+      loongson,gpio-conf-offset = <0>;
+      loongson,gpio-in-offset = <0x20>;
+      loongson,gpio-out-offset = <0x10>;
+      loongson,gpio-ctrl-mode = <0>;
+      loongson,gpio-inten-offset = <0x30>;
       gpio-ranges = <&pctrl 0 0 15>,
                     <&pctrl 16 16 15>,
                     <&pctrl 32 32 10>,
-- 
2.20.1