ASoC: dt-bindings: cs35l45: GPIOs configuration

This adds description of CS35L45 GPIOs configuration.

Signed-off-by: Vlad Karpovich <vkarpovi@opensource.cirrus.com>
Link: https://lore.kernel.org/r/20230315154722.3911463-2-vkarpovi@opensource.cirrus.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Documentation/devicetree/bindings/sound/cirrus,cs35l45.yaml

@@ -50,6 +50,74 @@ properties:
     maximum: 3
     default: 2
 
+patternProperties:
+  "^cirrus,gpio-ctrl[1-3]$":
+    description:
+      GPIO pins configuration.
+    type: object
+    additionalProperties: false
+    properties:
+      gpio-dir:
+        description:
+          GPIO pin direction. Valid only when 'gpio-ctrl' is 1
+            0 = Output
+            1 = Input
+        $ref: "/schemas/types.yaml#/definitions/uint32"
+        minimum: 0
+        maximum: 1
+        default: 1
+      gpio-lvl:
+        description:
+          GPIO level. Valid only when 'gpio-ctrl' is 1 and 'gpio-dir' is 0
+            0 = Low
+            1 = High
+        $ref: "/schemas/types.yaml#/definitions/uint32"
+        minimum: 0
+        maximum: 1
+        default: 0
+      gpio-op-cfg:
+        description:
+          GPIO level. Valid only when 'gpio-ctrl' is 1 and 'gpio-dir' is 0
+            0 = CMOS
+            1 = Open Drain
+        $ref: "/schemas/types.yaml#/definitions/uint32"
+        minimum: 0
+        maximum: 1
+        default: 0
+      gpio-pol:
+        description:
+          GPIO output polarity select. Valid only when 'gpio-ctrl' is 1
+          and 'gpio-dir' is 0
+            0 = Non-inverted, Active High
+            1 = Inverted, Active Low
+        $ref: "/schemas/types.yaml#/definitions/uint32"
+        minimum: 0
+        maximum: 1
+        default: 0
+      gpio-ctrl:
+        description:
+          Defines the function of the GPIO pin.
+          GPIO1
+            0 = High impedance input
+            1 = Pin acts as a GPIO, direction controlled by 'gpio-dir'
+            2 = Pin acts as MDSYNC, direction controlled by MDSYNC
+            3-7 = Reserved
+          GPIO2
+            0 = High impedance input
+            1 = Pin acts as a GPIO, direction controlled by 'gpio-dir'
+            2 = Pin acts as open drain INT
+            3 = Reserved
+            4 = Pin acts as push-pull output INT. Active low.
+            5 = Pin acts as push-pull output INT. Active high.
+            6,7 = Reserved
+          GPIO3
+            0 = High impedance input
+            1 = Pin acts as a GPIO, direction controlled by 'gpio-dir'
+            2-7 = Reserved
+        $ref: "/schemas/types.yaml#/definitions/uint32"
+        minimum: 0
+        maximum: 7
+        default: 0
 required:
   - compatible
   - reg
@@ -74,5 +142,15 @@ examples:
           reset-gpios = <&gpio 110 0>;
           cirrus,asp-sdout-hiz-ctrl = <(CS35L45_ASP_TX_HIZ_UNUSED |
                                         CS35L45_ASP_TX_HIZ_DISABLED)>;
+          cirrus,gpio-ctrl1 {
+             gpio-ctrl = <0x2>;
+          };
+          cirrus,gpio-ctrl2 {
+             gpio-ctrl = <0x2>;
+          };
+          cirrus,gpio-ctrl3 {
+             gpio-ctrl = <0x1>;
+             gpio-dir = <0x1>;
+          };
         };
     };