dt-bindings: pinctrl: qcom: Add SDM670 LPASS LPI pinctrl

Add the pin controller for the audio Low-Power Island (LPI) on SDM670.

Signed-off-by: Richard Acayan <mailingradian@gmail.com>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@oss.qualcomm.com>
Signed-off-by: Linus Walleij <linusw@kernel.org>

diff --git a/Documentation/devicetree/bindings/pinctrl/qcom,sdm670-lpass-lpi-pinctrl.yaml b/Documentation/devicetree/bindings/pinctrl/qcom,sdm670-lpass-lpi-pinctrl.yaml
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+++ b/Documentation/devicetree/bindings/pinctrl/qcom,sdm670-lpass-lpi-pinctrl.yaml
@@ -0,0 +1,81 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/qcom,sdm670-lpass-lpi-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SDM670 SoC LPASS LPI TLMM
+
+maintainers:
+  - Richard Acayan <mailingradian@gmail.com>
+
+description:
+  Top Level Mode Multiplexer pin controller in the Low Power Audio SubSystem
+  (LPASS) Low Power Island (LPI) of Qualcomm SDM670 SoC.
+
+properties:
+  compatible:
+    const: qcom,sdm670-lpass-lpi-pinctrl
+
+  reg:
+    items:
+      - description: LPASS LPI TLMM Control and Status registers
+
+patternProperties:
+  "-state$":
+    oneOf:
+      - $ref: "#/$defs/qcom-sdm670-lpass-state"
+      - patternProperties:
+          "-pins$":
+            $ref: "#/$defs/qcom-sdm670-lpass-state"
+        additionalProperties: false
+
+$defs:
+  qcom-sdm670-lpass-state:
+    type: object
+    description:
+      Pinctrl node's client devices use subnodes for desired pin configuration.
+      Client device subnodes use below standard properties.
+    $ref: qcom,lpass-lpi-common.yaml#/$defs/qcom-tlmm-state
+    unevaluatedProperties: false
+
+    properties:
+      pins:
+        description:
+          List of gpio pins affected by the properties specified in this
+          subnode.
+        items:
+          pattern: "^gpio([0-9]|1[0-9]|2[0-9]|3[0-1])$"
+
+      function:
+        enum: [ gpio, comp_rx, dmic1_clk, dmic1_data, dmic2_clk, dmic2_data,
+                i2s1_clk, i2s_data, i2s_ws, lpi_cdc_rst, mclk0, pdm_rx,
+                pdm_sync, pdm_tx, slimbus_clk ]
+        description:
+          Specify the alternative function to be configured for the specified
+          pins.
+
+allOf:
+  - $ref: qcom,lpass-lpi-common.yaml#
+
+required:
+  - compatible
+  - reg
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    lpi_tlmm: pinctrl@62b40000 {
+        compatible = "qcom,sdm670-lpass-lpi-pinctrl";
+        reg = <0x62b40000 0x20000>;
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&lpi_tlmm 0 0 32>;
+
+        cdc_comp_default: cdc-comp-default-state {
+            pins = "gpio22", "gpio24";
+            function = "comp_rx";
+            drive-strength = <4>;
+        };
+    };