linux-kernel - [PATCH RFC 03/15] coresight: remove multiple init calls from replicator driver

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Date:   Fri, 17 Jan 2020 15:39:58 +0100
From:   Mian Yousaf Kaukab <ykaukab@...e.de>
To:     linux-arm-kernel@...ts.infradead.org, mathieu.poirier@...aro.org
Cc:     linux-kernel@...r.kernel.org, paul.gortmaker@...driver.com,
        suzuki.poulose@....com, alexander.shishkin@...ux.intel.com,
        Mian Yousaf Kaukab <ykaukab@...e.de>
Subject: [PATCH RFC 03/15] coresight: remove multiple init calls from replicator driver

Dynamic-replicator uses module_amba_driver to register. Whereas
static-replicator uses builtin_platform_driver. Combine these init
calls into a single module_init/exit pair in preparation to make the
driver modular.

Signed-off-by: Mian Yousaf Kaukab <ykaukab@...e.de>
---
 drivers/hwtracing/coresight/coresight-replicator.c | 30 ++++++++++++++++++++--
 1 file changed, 28 insertions(+), 2 deletions(-)

diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index cc14c3696be0..137328a7f27e 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -340,7 +340,6 @@ static struct platform_driver static_replicator_driver = {
 		.suppress_bind_attrs = true,
 	},
 };
-builtin_platform_driver(static_replicator_driver);
 
 static int dynamic_replicator_probe(struct amba_device *adev,
 				    const struct amba_id *id)
@@ -370,7 +369,34 @@ static struct amba_driver dynamic_replicator_driver = {
 	.probe		= dynamic_replicator_probe,
 	.id_table	= dynamic_replicator_ids,
 };
-module_amba_driver(dynamic_replicator_driver);
+
+static int __init replicator_init(void)
+{
+	int ret;
+
+	ret = platform_driver_register(&static_replicator_driver);
+	if (ret) {
+		pr_info("Error registering platform driver\n");
+		return ret;
+	}
+
+	ret = amba_driver_register(&dynamic_replicator_driver);
+	if (ret) {
+		pr_info("Error registering amba driver\n");
+		platform_driver_unregister(&static_replicator_driver);
+	}
+
+	return ret;
+}
+
+static void __exit replicator_exit(void)
+{
+	platform_driver_unregister(&static_replicator_driver);
+	amba_driver_unregister(&dynamic_replicator_driver);
+}
+
+module_init(replicator_init);
+module_exit(replicator_exit);
 
 MODULE_LICENSE("GPL v2");
 MODULE_DESCRIPTION("CoreSight Replicator driver");
-- 
2.16.4