[PATCH v10 7/7] qcom-tgu: Add reset node to initialize

@@ -42,3 +42,10 @@ KernelVersion	6.19
 Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
 Description:
 		(RW) Set/Get the counter value with specific step for TGU.
+
+What:		/sys/bus/amba/devices/<tgu-name>/reset_tgu
+Date:		January 2026
+KernelVersion	6.19
+Contact:	Jinlong Mao <jinlong.mao@oss.qualcomm.com>, Songwei Chai <songwei.chai@oss.qualcomm.com>
+Description:
+		(Write) Write 1 to reset the dataset for TGU.

@@ -424,8 +424,82 @@ static ssize_t enable_tgu_store(struct device *dev,
 }
 static DEVICE_ATTR_RW(enable_tgu);
 
+/* reset_tgu_store - Reset Trace and Gating Unit (TGU) configuration. */
+static ssize_t reset_tgu_store(struct device *dev,
+			       struct device_attribute *attr, const char *buf,
+			       size_t size)
+{
+	struct tgu_drvdata *drvdata = dev_get_drvdata(dev);
+	unsigned long value;
+	int i, j, ret;
+
+	if (kstrtoul(buf, 0, &value) || value == 0)
+		return -EINVAL;
+
+	if (!drvdata->enable) {
+		ret = pm_runtime_get_sync(drvdata->dev);
+		if (ret < 0) {
+			pm_runtime_put(drvdata->dev);
+			return ret;
+		}
+	}
+
+	guard(spinlock)(&drvdata->lock);
+	TGU_UNLOCK(drvdata->base);
+
+	writel(0, drvdata->base + TGU_CONTROL);
+
+	TGU_LOCK(drvdata->base);
+
+	if (drvdata->value_table->priority)
+		memset(drvdata->value_table->priority, 0,
+			    MAX_PRIORITY * drvdata->max_step *
+				drvdata->max_reg * sizeof(unsigned int));
+
+	if (drvdata->value_table->condition_decode)
+		memset(drvdata->value_table->condition_decode, 0,
+			    drvdata->max_condition_decode * drvdata->max_step *
+				sizeof(unsigned int));
+
+		/* Initialize all condition registers to NOT(value=0x1000000) */
+	for (i = 0; i < drvdata->max_step; i++) {
+		for (j = 0; j < drvdata->max_condition_decode; j++) {
+			drvdata->value_table
+			->condition_decode[calculate_array_location(
+			drvdata, i, TGU_CONDITION_DECODE, j)] =
+			0x1000000;
+		}
+	}
+
+	if (drvdata->value_table->condition_select)
+		memset(drvdata->value_table->condition_select, 0,
+				drvdata->max_condition_select * drvdata->max_step *
+				sizeof(unsigned int));
+
+	if (drvdata->value_table->timer)
+		memset(drvdata->value_table->timer, 0,
+			    (drvdata->max_step) *
+				(drvdata->max_timer) *
+				sizeof(unsigned int));
+
+	if (drvdata->value_table->counter)
+		memset(drvdata->value_table->counter, 0,
+			    (drvdata->max_step) *
+				(drvdata->max_counter) *
+				sizeof(unsigned int));
+
+	dev_dbg(dev, "Qualcomm-TGU reset complete\n");
+
+	drvdata->enable = false;
+	pm_runtime_put(drvdata->dev);
+
+	return size;
+}
+static DEVICE_ATTR_WO(reset_tgu);
+
 static struct attribute *tgu_common_attrs[] = {
 	&dev_attr_enable_tgu.attr,
+	&dev_attr_reset_tgu.attr,
 	NULL,
 };