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coresight: make boot_enable support individual remote etm enablement 

Currently boot_enable supports enabling all remote ETM devices or none.
Make it granular to support individual remote ETM device enablement
thereby providing more control and flexibility.

Change-Id: Ie8526591f617456fcfa03178a24510a9cbd73cba
Signed-off-by: Xiaogang Cui <xiaogang@codeaurora.org>
This commit is contained in:
Xiaogang Cui 2015-05-07 15:03:17 +08:00
parent 5c92255fcd
commit 118d936456
2 changed files with 3 additions and 14 deletions
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9
drivers/coresight/Kconfig
View File

@ -241,15 +241,6 @@ config CORESIGHT_REMOTE_ETM
tracing on remote processor via sysfs by configuring the required
CoreSight components.
config CORESIGHT_REMOTE_ETM_DEFAULT_ENABLE
bool "Turn on remote processor ETM tracing by default"
help
Turns on CoreSight remote processor ETM tracing by default. Otherwise,
tracing is disabled by default but can be enabled via sysfs.
If unsure, say 'N' here to avoid potential power and performance
penalty.
endif
config CORESIGHT_QPDI

8
drivers/coresight/coresight-remote-etm.c
View File

@ -25,11 +25,7 @@
#include <linux/coresight.h>
#include "coresight-qmi.h"
#ifdef CONFIG_CORESIGHT_REMOTE_ETM_DEFAULT_ENABLE
static int boot_enable = 1;
#else
static int boot_enable;
#endif
module_param_named(
boot_enable, boot_enable, int, S_IRUGO
);
@ -310,7 +306,9 @@ static int remote_etm_probe(struct platform_device *pdev)
}
dev_info(dev, "Remote ETM initialized\n");
if (boot_enable)
if (drvdata->inst_id >= sizeof(int)*BITS_PER_BYTE)
dev_err(dev, "inst_id greater than boot_enable bit mask\n");
else if (boot_enable & BIT(drvdata->inst_id))
coresight_enable(drvdata->csdev);
return 0;