[PATCH v3 09/20] coresight: allow etb to be built as a module
From: Tingwei Zhang <hidden>
Date: 2020-07-17 05:49:00
Subsystem:
arm/coresight framework and drivers, hardware tracing facilities, the rest · Maintainers:
Suzuki K Poulose, Alexander Shishkin, Linus Torvalds
From: Kim Phillips <redacted> Allow to build coresight-etb10 as a module, for ease of development. - Kconfig becomes a tristate, to allow =m - add an etb_remove function, for module unload - add a MODULE_DEVICE_TABLE for autoloading on boot Cc: Mathieu Poirier <mathieu.poirier@linaro.org> Cc: Leo Yan <redacted> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Randy Dunlap <redacted> Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Kim Phillips <redacted> Signed-off-by: Tingwei Zhang <redacted> --- drivers/hwtracing/coresight/Kconfig | 5 ++++- drivers/hwtracing/coresight/coresight-etb10.c | 20 ++++++++++++++++++- 2 files changed, 23 insertions(+), 2 deletions(-)
diff --git a/drivers/hwtracing/coresight/Kconfig b/drivers/hwtracing/coresight/Kconfig
index d6e107bbd30b..996d84a1edb8 100644
--- a/drivers/hwtracing/coresight/Kconfig
+++ b/drivers/hwtracing/coresight/Kconfig@@ -57,13 +57,16 @@ config CORESIGHT_SINK_TPIU the on-board coresight memory can handle. config CORESIGHT_SINK_ETBV10 - bool "Coresight ETBv1.0 driver" + tristate "Coresight ETBv1.0 driver" depends on CORESIGHT_LINKS_AND_SINKS help This enables support for the Embedded Trace Buffer version 1.0 driver that complies with the generic implementation of the component without special enhancement or added features. + To compile this driver as a module, choose M here: the + module will be called coresight-etb10. + config CORESIGHT_SOURCE_ETM3X tristate "CoreSight Embedded Trace Macrocell 3.x driver" depends on !ARM64
diff --git a/drivers/hwtracing/coresight/coresight-etb10.c b/drivers/hwtracing/coresight/coresight-etb10.c
index 04ee9cda988d..b40756497c9a 100644
--- a/drivers/hwtracing/coresight/coresight-etb10.c
+++ b/drivers/hwtracing/coresight/coresight-etb10.c@@ -801,6 +801,16 @@ static int etb_probe(struct amba_device *adev, const struct amba_id *id) return ret; } +static int __exit etb_remove(struct amba_device *adev) +{ + struct etb_drvdata *drvdata = dev_get_drvdata(&adev->dev); + + misc_deregister(&drvdata->miscdev); + coresight_unregister(drvdata->csdev); + + return 0; +} + #ifdef CONFIG_PM static int etb_runtime_suspend(struct device *dev) {
@@ -835,6 +845,8 @@ static const struct amba_id etb_ids[] = { { 0, 0}, }; +MODULE_DEVICE_TABLE(amba, etb_ids); + static struct amba_driver etb_driver = { .drv = { .name = "coresight-etb10",
@@ -844,6 +856,12 @@ static struct amba_driver etb_driver = { }, .probe = etb_probe, + .remove = etb_remove, .id_table = etb_ids, }; -builtin_amba_driver(etb_driver); +module_amba_driver(etb_driver); + +MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>"); +MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>"); +MODULE_DESCRIPTION("Arm CoreSight Embedded Trace Buffer driver"); +MODULE_LICENSE("GPL v2");
--
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