Commit 8b0cf826 authored by Tingwei Zhang's avatar Tingwei Zhang Committed by Greg Kroah-Hartman
Browse files

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



- 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: default avatarMike Leach <mike.leach@linaro.org>
Reviewed-by: default avatarSuzuki K Poulose <suzuki.poulose@arm.com>
Signed-off-by: default avatarKim Phillips <kim.phillips@arm.com>
Signed-off-by: default avatarTingwei Zhang <tingwei@codeaurora.org>
Signed-off-by: default avatarMathieu Poirier <mathieu.poirier@linaro.org>
Link: https://lore.kernel.org/r/20200928163513.70169-8-mathieu.poirier@linaro.org


Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 32b0707a

drivers/hwtracing/coresight/Kconfig

+4 −1
Original line number Diff line number Diff line
@@ -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

drivers/hwtracing/coresight/coresight-stm.c

+19 −1
Original line number Diff line number Diff line
@@ -951,6 +951,17 @@ stm_unregister: 
	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");

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