--- zzzz-none-000/linux-4.4.271/drivers/hwtracing/coresight/of_coresight.c	2021-06-03 06:22:09.000000000 +0000
+++ hawkeye-5590-750/linux-4.4.271/drivers/hwtracing/coresight/of_coresight.c	2023-04-19 10:22:28.000000000 +0000
@@ -1,4 +1,4 @@
-/* Copyright (c) 2012, The Linux Foundation. All rights reserved.
+/* Copyright (c) 2012, 2016 The Linux Foundation. All rights reserved.
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 2 and
@@ -22,6 +22,7 @@
 #include <linux/platform_device.h>
 #include <linux/amba/bus.h>
 #include <linux/coresight.h>
+#include <linux/coresight-cti.h>
 #include <linux/cpumask.h>
 #include <asm/smp_plat.h>
 
@@ -58,16 +59,22 @@
 {
 	struct device_node *ep = NULL;
 	int in = 0, out = 0;
+	struct of_endpoint endpoint;
 
 	do {
 		ep = of_graph_get_next_endpoint(node, ep);
 		if (!ep)
 			break;
 
+		if (of_graph_parse_endpoint(ep, &endpoint))
+			continue;
+
 		if (of_property_read_bool(ep, "slave-mode"))
-			in++;
+			in = (endpoint.port + 1 > in) ?
+				endpoint.port + 1 : in;
 		else
-			out++;
+			out = (endpoint.port + 1) > out ?
+				endpoint.port + 1 : out;
 
 	} while (ep);
 
@@ -118,8 +125,9 @@
 	if (!pdata)
 		return ERR_PTR(-ENOMEM);
 
-	/* Use device name as sysfs handle */
-	pdata->name = dev_name(dev);
+	ret = of_property_read_string(node, "coresight-name", &pdata->name);
+	if (ret)
+		return ERR_PTR(ret);
 
 	/* Get the number of input and output port for this component */
 	of_coresight_get_ports(node, &pdata->nr_inport, &pdata->nr_outport);
@@ -169,15 +177,19 @@
 			if (!rdev)
 				continue;
 
-			pdata->child_names[i] = dev_name(rdev);
+			ret = of_property_read_string(rparent, "coresight-name",
+						      &pdata->child_names[i]);
+			if (ret)
+				pdata->child_names[i] = dev_name(rdev);
+
 			pdata->child_ports[i] = rendpoint.id;
 
 			i++;
 		} while (ep);
 	}
 
-	/* Affinity defaults to CPU0 */
-	pdata->cpu = 0;
+	/* Affinity defaults to -1 (invalid) */
+	pdata->cpu = -1;
 	dn = of_parse_phandle(node, "cpu", 0);
 	for (cpu = 0; dn && cpu < nr_cpu_ids; cpu++) {
 		if (dn == of_get_cpu_node(cpu, NULL)) {
@@ -189,3 +201,45 @@
 	return pdata;
 }
 EXPORT_SYMBOL_GPL(of_get_coresight_platform_data);
+
+struct coresight_cti_data *of_get_coresight_cti_data(
+				struct device *dev, struct device_node *node)
+{
+	int i, ret;
+	uint32_t ctis_len;
+	struct device_node *child_node;
+	struct coresight_cti_data *ctidata;
+
+	ctidata = devm_kzalloc(dev, sizeof(*ctidata), GFP_KERNEL);
+	if (!ctidata)
+		return ERR_PTR(-ENOMEM);
+
+	if (of_get_property(node, "coresight-ctis", &ctis_len))
+		ctidata->nr_ctis = ctis_len/sizeof(uint32_t);
+	else
+		return ERR_PTR(-EINVAL);
+
+	if (ctidata->nr_ctis) {
+		ctidata->names = devm_kzalloc(dev, ctidata->nr_ctis *
+					      sizeof(*ctidata->names),
+					      GFP_KERNEL);
+		if (!ctidata->names)
+			return ERR_PTR(-ENOMEM);
+
+		for (i = 0; i < ctidata->nr_ctis; i++) {
+			child_node = of_parse_phandle(node, "coresight-ctis",
+						      i);
+			if (!child_node)
+				return ERR_PTR(-EINVAL);
+
+			ret = of_property_read_string(child_node,
+						      "coresight-name",
+						      &ctidata->names[i]);
+			of_node_put(child_node);
+			if (ret)
+				return ERR_PTR(ret);
+		}
+	}
+	return ctidata;
+}
+EXPORT_SYMBOL(of_get_coresight_cti_data);