linux-kernel - [PATCH v1 4/5] driver/hwtracing/coresight: Use of_cpu_phandle_to

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Message-ID: <20250422084340.457-5-alireza.sanaee@huawei.com>
Date: Tue, 22 Apr 2025 09:43:39 +0100
From: Alireza Sanaee <alireza.sanaee@...wei.com>
To: <devicetree-spec@...r.kernel.org>
CC: <robh@...nel.org>, <mark.rutland@....com>,
	<linux-arm-kernel@...ts.infradead.org>, <linux-kernel@...r.kernel.org>,
	<jonathan.cameron@...wei.com>, <shameerali.kolothum.thodi@...wei.com>,
	<linuxarm@...wei.com>
Subject: [PATCH v1 4/5] driver/hwtracing/coresight: Use of_cpu_phandle_to_id for grabbing CPU id.

Use the newly created API to grab CPU id.

Signed-off-by: Alireza Sanaee <alireza.sanaee@...wei.com>
---
 .../hwtracing/coresight/coresight-cti-platform.c  | 15 +++------------
 drivers/hwtracing/coresight/coresight-platform.c  | 14 ++------------
 2 files changed, 5 insertions(+), 24 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-cti-platform.c b/drivers/hwtracing/coresight/coresight-cti-platform.c
index d0ae10bf6128..6a6e84245112 100644
--- a/drivers/hwtracing/coresight/coresight-cti-platform.c
+++ b/drivers/hwtracing/coresight/coresight-cti-platform.c
@@ -41,21 +41,12 @@
  */
 static int of_cti_get_cpu_at_node(const struct device_node *node)
 {
+	struct device_node *dn = NULL;
 	int cpu;
-	struct device_node *dn;
 
-	if (node == NULL)
-		return -1;
-
-	dn = of_parse_phandle(node, "cpu", 0);
-	/* CTI affinity defaults to no cpu */
-	if (!dn)
-		return -1;
-	cpu = of_cpu_node_to_id(dn);
+	cpu = of_cpu_phandle_to_id(node, dn,"cpu");
 	of_node_put(dn);
-
-	/* No Affinity  if no cpu nodes are found */
-	return (cpu < 0) ? -1 : cpu;
+	return cpu;
 }
 
 #else
diff --git a/drivers/hwtracing/coresight/coresight-platform.c b/drivers/hwtracing/coresight/coresight-platform.c
index 8192ba3279f0..cb953f25da82 100644
--- a/drivers/hwtracing/coresight/coresight-platform.c
+++ b/drivers/hwtracing/coresight/coresight-platform.c
@@ -167,19 +167,9 @@ of_coresight_get_output_ports_node(const struct device_node *node)
 
 static int of_coresight_get_cpu(struct device *dev)
 {
-	int cpu;
-	struct device_node *dn;
-
-	if (!dev->of_node)
-		return -ENODEV;
-
-	dn = of_parse_phandle(dev->of_node, "cpu", 0);
-	if (!dn)
-		return -ENODEV;
-
-	cpu = of_cpu_node_to_id(dn);
+	struct device_node *dn = NULL;
+	int cpu = of_cpu_phandle_to_id(dev->of_node, dn, "cpu");
 	of_node_put(dn);
-
 	return cpu;
 }
 
-- 
2.43.0