This adds two different helpers i.e coresight_init_driver()/remove_driver()
enabling coresight devices to register or remove AMBA and platform drivers.
This changes replicator and funnel devices to use above new helpers.
Cc: Suzuki K Poulose <suzuki.poulose@xxxxxxx>
Cc: Mike Leach <mike.leach@xxxxxxxxxx>
Cc: James Clark <james.clark@xxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: linux-arm-kernel@xxxxxxxxxxxxxxxxxxx
Cc: linux-kernel@xxxxxxxxxxxxxxx
Cc: coresight@xxxxxxxxxxxxxxxx
Reviewed-by: James Clark <james.clark@xxxxxxx>
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
drivers/hwtracing/coresight/coresight-core.c | 29 +++++++++++++++++++
.../hwtracing/coresight/coresight-funnel.c | 19 ++----------
.../coresight/coresight-replicator.c | 20 ++-----------
include/linux/coresight.h | 7 +++++
4 files changed, 41 insertions(+), 34 deletions(-)
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
index b83613e34289..9fc6f6b863e0 100644
--- a/drivers/hwtracing/coresight/coresight-core.c
+++ b/drivers/hwtracing/coresight/coresight-core.c
@@ -1398,6 +1398,35 @@ static void __exit coresight_exit(void)
module_init(coresight_init);
module_exit(coresight_exit);
+int coresight_init_driver(const char *drv, struct amba_driver *amba_drv,
+ struct platform_driver *pdev_drv)
+{
+ int ret;
+
+ ret = amba_driver_register(amba_drv);
+ if (ret) {
+ pr_err("%s: error registering AMBA driver\n", drv);
+ return ret;
+ }
+
+ ret = platform_driver_register(pdev_drv);
+ if (!ret)
+ return 0;
+
+ pr_err("%s: error registering platform driver\n", drv);
+ amba_driver_unregister(amba_drv);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(coresight_init_driver);
+
+void coresight_remove_driver(struct amba_driver *amba_drv,
+ struct platform_driver *pdev_drv)
+{
+ amba_driver_unregister(amba_drv);
+ platform_driver_unregister(pdev_drv);
+}
+EXPORT_SYMBOL_GPL(coresight_remove_driver);
+
MODULE_LICENSE("GPL v2");
MODULE_AUTHOR("Pratik Patel <pratikp@xxxxxxxxxxxxxx>");
MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@xxxxxxxxxx>");
diff --git a/drivers/hwtracing/coresight/coresight-funnel.c b/drivers/hwtracing/coresight/coresight-funnel.c
index ef1a0abfee4e..ff3ea0670a5b 100644
--- a/drivers/hwtracing/coresight/coresight-funnel.c
+++ b/drivers/hwtracing/coresight/coresight-funnel.c
@@ -410,27 +410,12 @@ static struct amba_driver dynamic_funnel_driver = {
static int __init funnel_init(void)
{
- int ret;
-
- ret = platform_driver_register(&static_funnel_driver);
- if (ret) {
- pr_info("Error registering platform driver\n");
- return ret;
- }
-
- ret = amba_driver_register(&dynamic_funnel_driver);
- if (ret) {
- pr_info("Error registering amba driver\n");
- platform_driver_unregister(&static_funnel_driver);
- }
-
- return ret;
+ return coresight_init_driver("funnel", &dynamic_funnel_driver, &static_funnel_driver);
}
static void __exit funnel_exit(void)
{
- platform_driver_unregister(&static_funnel_driver);
- amba_driver_unregister(&dynamic_funnel_driver);
+ coresight_remove_driver(&dynamic_funnel_driver, &static_funnel_driver);
}
module_init(funnel_init);
diff --git a/drivers/hwtracing/coresight/coresight-replicator.c b/drivers/hwtracing/coresight/coresight-replicator.c
index 73452d9dc13b..ddb530a8436f 100644
--- a/drivers/hwtracing/coresight/coresight-replicator.c
+++ b/drivers/hwtracing/coresight/coresight-replicator.c
@@ -416,27 +416,13 @@ static struct 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;
+ return coresight_init_driver("replicator", &dynamic_replicator_driver,
+ &static_replicator_driver);
}
static void __exit replicator_exit(void)
{
- platform_driver_unregister(&static_replicator_driver);
- amba_driver_unregister(&dynamic_replicator_driver);
+ coresight_remove_driver(&dynamic_replicator_driver, &static_replicator_driver);
}
module_init(replicator_init);
diff --git a/include/linux/coresight.h b/include/linux/coresight.h
index 5f288d475490..653f1712eb77 100644
--- a/include/linux/coresight.h
+++ b/include/linux/coresight.h
@@ -12,6 +12,8 @@
#include <linux/io.h>
#include <linux/perf_event.h>
#include <linux/sched.h>
+#include <linux/amba/bus.h>
+#include <linux/platform_device.h>
/* Peripheral id registers (0xFD0-0xFEC) */
#define CORESIGHT_PERIPHIDR4 0xfd0
@@ -658,4 +660,9 @@ coresight_find_output_type(struct coresight_platform_data *pdata,
enum coresight_dev_type type,
union coresight_dev_subtype subtype);
+int coresight_init_driver(const char *drv, struct amba_driver *amba_drv,
+ struct platform_driver *pdev_drv);
+
+void coresight_remove_driver(struct amba_driver *amba_drv,
+ struct platform_driver *pdev_drv);
#endif /* _LINUX_COREISGHT_H */
--
2.25.1
