drivers: sensor: fix PM Implementation for LM75 temperature sensor

fixes the driver always returning -EIO  if PM_DEVICE_RUNTIME is enabled.

Signed-off-by: Jonas Woerner <[email protected]>

drivers/sensor/lm75/lm75.c

@@ -67,6 +67,13 @@ static int lm75_sample_fetch(const struct device *dev,
 	enum pm_device_state pm_state;
 	int ret;
 
+#ifdef CONFIG_PM_DEVICE_RUNTIME
+	ret = pm_device_runtime_get(dev);
+	if (ret < 0) {
+		LOG_ERR("pm_device_runtime_get failed with error %i", ret);
+		return ret;
+	}
+#endif
 	(void)pm_device_state_get(dev, &pm_state);
 	if (pm_state != PM_DEVICE_STATE_ACTIVE) {
 		ret = -EIO;
@@ -82,7 +89,13 @@ static int lm75_sample_fetch(const struct device *dev,
 		ret = -ENOTSUP;
 		break;
 	}
+#ifdef CONFIG_PM_DEVICE_RUNTIME
+	int ret2 = pm_device_runtime_put(dev);
 
+	if (ret2 < 0) {
+		LOG_ERR("pm_device_runtime_put failed with error %i", ret2);
+	}
+#endif
 	return ret;
 }