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Commit df85b0eb authored by Satyajit Desai's avatar Satyajit Desai Committed by Gerrit - the friendly Code Review server
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coresight: add node to reset all coresight devices 



Add new reset_source_sink node to be able to disable all
active coresight devices.

Change-Id: Id35f625f11e16ff4770992bd81f0964ea9b755e6
Signed-off-by: default avatarSatyajit Desai <sadesai@codeaurora.org>
Signed-off-by: default avatarRama Aparna Mallavarapu <aparnam@codeaurora.org>
parent cc9e502e

drivers/hwtracing/coresight/coresight.c

+35 −1
Original line number Diff line number Diff line
@@ -991,8 +991,42 @@ int coresight_timeout(void __iomem *addr, u32 offset, int position, int value) 
	return -EAGAIN;

}



static ssize_t reset_source_sink_store(struct bus_type *bus,

				       const char *buf, size_t size)

{

	int ret = 0;

	unsigned long val;

	struct coresight_path *cspath = NULL;

	struct coresight_path *cspath_next = NULL;

	struct coresight_device *csdev;



	ret = kstrtoul(buf, 10, &val);

	if (ret)

		return ret;



	mutex_lock(&coresight_mutex);



	list_for_each_entry_safe(cspath, cspath_next, &cs_active_paths, link) {

		csdev = coresight_get_source(cspath->path);

		if (!csdev)

			continue;

		coresight_disable(csdev);

	}



	mutex_unlock(&coresight_mutex);

	return size;

}

static BUS_ATTR_WO(reset_source_sink);



static struct attribute *coresight_reset_source_sink_attrs[] = {

	&bus_attr_reset_source_sink.attr,

	NULL,

};

ATTRIBUTE_GROUPS(coresight_reset_source_sink);



struct bus_type coresight_bustype = {

	.name		= "coresight",

	.bus_groups	= coresight_reset_source_sink_groups,

};



static int __init coresight_init(void)