drivers: sensor: add Innovative Sensor Technology TSic xx6 driver

Add driver for TSic 206/306/316/506F/516/716 temperature sensor.
The driver uses PWM capture driver to read a single wire with
Manchester-like encoding.

Signed-off-by: Jeppe Odgaard <jeppe.odgaard@prevas.dk>

dts/bindings/sensor/ist,tsic-xx6.yaml

@@ -0,0 +1,40 @@
+# Copyright (c) 2024, Vitrolife A/S
+# SPDX-License-Identifier: Apache-2.0
+
+description: |
+  TSic xx6 temperature sensor.
+  https://www.ist-ag.com/sites/default/files/downloads/ATTSic_E.pdf
+
+  Example:
+    tsic_716: tsic_716 {
+      status = "okay";
+      compatible = "ist,tsic-xx6";
+      pwms = <&pwm2 1 PWM_USEC(5) PWM_POLARITY_NORMAL>;
+      data-bits = <14>;
+      lower-temperature-limit = <(-10)>;
+      higher-temperature-limit = <60>;
+    };
+
+compatible: "ist,tsic-xx6"
+
+properties:
+  pwms:
+    required: true
+    type: phandle-array
+    description: Reference to a PWM instance with PWM capture support.
+
+  lower-temperature-limit:
+    required: true
+    type: int
+    description: Lowest temperature supported by the device in celcius degrees.
+
+  higher-temperature-limit:
+    required: true
+    type: int
+    description: Highest temperature supported by the device in celcius degrees.
+
+  data-bits:
+    required: true
+    type: int
+    description: Data bits per reading.
+    enum: [11, 14]

dts/bindings/vendor-prefixes.txt

@@ -321,6 +321,7 @@ isee	ISEE 2007 S.L.
 isentek	Isentek Inc.
 isil	Intersil
 issi	Integrated Silicon Solutions Inc.
+ist	Innovative Sensor Technology IST AG
 ite	ITE Tech. Inc.
 itead	ITEAD Intelligent Systems Co.Ltd
 ivo	InfoVision Optoelectronics Kunshan Co. Ltd.