dt-bindings: pinctrl: qcom: Add SM4250 pinctrl

Add device tree binding Documentation details for Qualcomm SM4250 LPASS
LPI(Low power Island) pinctrl device.

Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/20240612-sm4250-lpi-v4-1-a0342e47e21b@linaro.org
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

Documentation/devicetree/bindings/pinctrl/qcom,sm4250-lpass-lpi-pinctrl.yaml

@@ -0,0 +1,118 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pinctrl/qcom,sm4250-lpass-lpi-pinctrl.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Qualcomm SM4250 SoC LPASS LPI TLMM
+
+maintainers:
+  - Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
+
+description:
+  Top Level Mode Multiplexer pin controller in the Low Power Audio SubSystem
+  (LPASS) Low Power Island (LPI) of Qualcomm SM4250 SoC.
+
+properties:
+  compatible:
+    const: qcom,sm4250-lpass-lpi-pinctrl
+
+  reg:
+    items:
+      - description: LPASS LPI TLMM Control and Status registers
+      - description: LPASS LPI MCC registers
+
+  clocks:
+    items:
+      - description: LPASS Audio voting clock
+
+  clock-names:
+    items:
+      - const: audio
+
+patternProperties:
+  "-state$":
+    oneOf:
+      - $ref: "#/$defs/qcom-sm4250-lpass-state"
+      - patternProperties:
+          "-pins$":
+            $ref: "#/$defs/qcom-sm4250-lpass-state"
+        additionalProperties: false
+
+$defs:
+  qcom-sm4250-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[0-6])$"
+
+      function:
+        enum: [ gpio, dmic01_clk, dmic01_data, dmic23_clk, dmic23_data,
+                dmic4_clk, dmic4_data, ext_mclk0_a, ext_mclk0_b, ext_mclk1_a,
+                ext_mclk1_b, ext_mclk1_c, i2s1_clk, i2s1_data, i2s1_ws,
+                i2s2_clk, i2s2_data, i2s2_ws, i2s3_clk, i2s3_data, i2s3_ws,
+                qua_mi2s_data, qua_mi2s_sclk, qua_mi2s_ws, slim_clk, slim_data,
+                swr_rx_clk, swr_rx_data, swr_tx_clk, swr_tx_data, swr_wsa_clk,
+                swr_wsa_data ]
+        description:
+          Specify the alternative function to be configured for the specified
+          pins.
+
+allOf:
+  - $ref: qcom,lpass-lpi-common.yaml#
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/sound/qcom,q6afe.h>
+    lpi_tlmm: pinctrl@a7c0000 {
+        compatible = "qcom,sm4250-lpass-lpi-pinctrl";
+        reg = <0xa7c0000 0x20000>,
+              <0xa950000 0x10000>;
+        clocks = <&q6afecc LPASS_HW_DCODEC_VOTE LPASS_CLK_ATTRIBUTE_COUPLE_NO>;
+        clock-names = "audio";
+        gpio-controller;
+        #gpio-cells = <2>;
+        gpio-ranges = <&lpi_tlmm 0 0 19>;
+
+        i2s2-active-state {
+            clk-pins {
+                pins = "gpio10";
+                function = "i2s2_clk";
+                drive-strength = <2>;
+                slew-rate = <1>;
+                bias-disable;
+            };
+
+            data-pins {
+                pins = "gpio12";
+                function = "i2s2_data";
+                drive-strength = <2>;
+                slew-rate = <1>;
+            };
+        };
+
+        i2s2-sleep-clk-state {
+            pins = "gpio10";
+            function = "i2s2_clk";
+            drive-strength = <2>;
+            bias-pull-down;
+        };
+    };