This adds two different helpers i.e coresight_init_driver()/remove_driver()
enabling coresight devices to register or remove AMBA and platform drivers.
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
Signed-off-by: Anshuman Khandual <anshuman.khandual@xxxxxxx>
---
Changes in V3:
- New patch in the series
drivers/hwtracing/coresight/coresight-core.c | 29 ++++++++++++++++++++
include/linux/coresight.h | 7 +++++
2 files changed, 36 insertions(+)
diff --git a/drivers/hwtracing/coresight/coresight-core.c b/drivers/hwtracing/coresight/coresight-core.c
index 9fabe00a40d6..ede9b0723f95 100644
--- a/drivers/hwtracing/coresight/coresight-core.c
+++ b/drivers/hwtracing/coresight/coresight-core.c
@@ -1833,6 +1833,35 @@ 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/include/linux/coresight.h b/include/linux/coresight.h
index a269fffaf991..be7fe3793763 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
@@ -597,6 +599,11 @@ void coresight_relaxed_write64(struct coresight_device *csdev,
u64 val, u32 offset);
void coresight_write64(struct coresight_device *csdev, u64 val, u32 offset);
+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);
#else
static inline struct coresight_device *
coresight_register(struct coresight_desc *desc) { return NULL; }
--
2.25.1
