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coresight: stm: Allow to build coresight-stm as a module

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- Kconfig becomes a tristate, to allow =m
- add a stm_remove function, for module unload
- add a MODULE_DEVICE_TABLE for autoloading on boot

Cc: Mathieu Poirier <mathieu.poirier@linaro.org>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Suzuki K Poulose <Suzuki.Poulose@arm.com>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Cc: Russell King <linux@armlinux.org.uk>
Tested-by: Mike Leach <mike.leach@linaro.org>
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: Kim Phillips <kim.phillips@arm.com>
Signed-off-by: Tingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200928163513.70169-8-mathieu.poirier@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Tingwei Zhang 2020-09-28 10:34:55 -06:00 committed by Greg Kroah-Hartman
parent 32b0707a41
commit 8b0cf82677
2 changed files with 23 additions and 2 deletions
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5
drivers/hwtracing/coresight/Kconfig
View File

@ -86,7 +86,7 @@ config CORESIGHT_SOURCE_ETM4X
data tracing may also be available.
config CORESIGHT_STM
bool "CoreSight System Trace Macrocell driver"
tristate "CoreSight System Trace Macrocell driver"
depends on (ARM && !(CPU_32v3 || CPU_32v4 || CPU_32v4T)) || ARM64
select CORESIGHT_LINKS_AND_SINKS
select STM
@ -96,6 +96,9 @@ config CORESIGHT_STM
logging useful software events or data coming from various entities
in the system, possibly running different OSs
To compile this driver as a module, choose M here: the
module will be called coresight-stm.
config CORESIGHT_CPU_DEBUG
tristate "CoreSight CPU Debug driver"
depends on ARM || ARM64

20
drivers/hwtracing/coresight/coresight-stm.c
View File

@ -951,6 +951,17 @@ static int stm_probe(struct amba_device *adev, const struct amba_id *id)
return ret;
}
static int __exit stm_remove(struct amba_device *adev)
{
struct stm_drvdata *drvdata = dev_get_drvdata(&adev->dev);
coresight_unregister(drvdata->csdev);
stm_unregister_device(&drvdata->stm);
return 0;
}
#ifdef CONFIG_PM
static int stm_runtime_suspend(struct device *dev)
{
@ -983,6 +994,8 @@ static const struct amba_id stm_ids[] = {
{ 0, 0},
};
MODULE_DEVICE_TABLE(amba, stm_ids);
static struct amba_driver stm_driver = {
.drv = {
.name = "coresight-stm",
@ -991,7 +1004,12 @@ static struct amba_driver stm_driver = {
.suppress_bind_attrs = true,
},
.probe = stm_probe,
.remove = stm_remove,
.id_table = stm_ids,
};
builtin_amba_driver(stm_driver);
module_amba_driver(stm_driver);
MODULE_AUTHOR("Pratik Patel <pratikp@codeaurora.org>");
MODULE_DESCRIPTION("Arm CoreSight System Trace Macrocell driver");
MODULE_LICENSE("GPL v2");