hwtracing: coresight: Use of_reserved_mem_region_to_resource() for "memory-region"

Use the newly added of_reserved_mem_region_to_resource() function to
handle "memory-region" properties.

Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20250703183534.2075569-1-robh@kernel.org

diff --git a/drivers/hwtracing/coresight/coresight-tmc-core.c b/drivers/hwtracing/coresight/coresight-tmc-core.c
index 88afb16bb6bec395ba535155228d176250f38625..be964656be9335f1b74277ba4e012ab8d6ed1785 100644 (file)
--- a/drivers/hwtracing/coresight/coresight-tmc-core.c
+++ b/drivers/hwtracing/coresight/coresight-tmc-core.c
@@ -24,6 +24,7 @@
 #include <linux/pm_runtime.h>
 #include <linux/of.h>
 #include <linux/of_address.h>
+#include <linux/of_reserved_mem.h>
 #include <linux/coresight.h>
 #include <linux/amba/bus.h>
 #include <linux/platform_device.h>
@@ -634,25 +635,14 @@ static int of_tmc_get_reserved_resource_by_name(struct device *dev,
                                                const char *name,
                                                struct resource *res)
 {
-       int index, rc = -ENODEV;
-       struct device_node *node;
+       int rc = -ENODEV;
 
-       if (!is_of_node(dev->fwnode))
-               return -ENODEV;
-
-       index = of_property_match_string(dev->of_node, "memory-region-names",
-                                        name);
-       if (index < 0)
-               return rc;
-
-       node = of_parse_phandle(dev->of_node, "memory-region", index);
-       if (!node)
+       rc = of_reserved_mem_region_to_resource_byname(dev->of_node, name, res);
+       if (rc < 0)
                return rc;
 
-       if (!of_address_to_resource(node, 0, res) &&
-           res->start != 0 && resource_size(res) != 0)
-               rc = 0;
-       of_node_put(node);
+       if (res->start == 0 || resource_size(res) == 0)
+               rc = -ENODEV;
 
        return rc;
 }