Commit 0430b1d5 authored by Viresh Kumar's avatar Viresh Kumar
Browse files

opp: Expose bandwidth information via debugfs 



Expose the bandwidth information as well via debugfs.

Signed-off-by: default avatarViresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: default avatarGeorgi Djakov <georgi.djakov@linaro.org>
parent 8b17f17a

drivers/interconnect/core.c

+18 −0
Original line number Diff line number Diff line
@@ -514,6 +514,24 @@ void icc_set_tag(struct icc_path *path, u32 tag) 
}

EXPORT_SYMBOL_GPL(icc_set_tag);



/**

 * icc_get_name() - Get name of the icc path

 * @path: reference to the path returned by icc_get()

 *

 * This function is used by an interconnect consumer to get the name of the icc

 * path.

 *

 * Returns a valid pointer on success, or NULL otherwise.

 */

const char *icc_get_name(struct icc_path *path)

{

	if (!path)

		return NULL;



	return path->name;

}

EXPORT_SYMBOL_GPL(icc_get_name);



/**

 * icc_set_bw() - set bandwidth constraints on an interconnect path

 * @path: reference to the path returned by icc_get()

drivers/opp/debugfs.c

+42 −0
Original line number Diff line number Diff line
@@ -32,6 +32,47 @@ void opp_debug_remove_one(struct dev_pm_opp *opp) 
	debugfs_remove_recursive(opp->dentry);

}



static ssize_t bw_name_read(struct file *fp, char __user *userbuf,

			    size_t count, loff_t *ppos)

{

	struct icc_path *path = fp->private_data;

	char buf[64];

	int i;



	i = scnprintf(buf, sizeof(buf), "%.62s\n", icc_get_name(path));



	return simple_read_from_buffer(userbuf, count, ppos, buf, i);

}



static const struct file_operations bw_name_fops = {

	.open = simple_open,

	.read = bw_name_read,

	.llseek = default_llseek,

};



static void opp_debug_create_bw(struct dev_pm_opp *opp,

				struct opp_table *opp_table,

				struct dentry *pdentry)

{

	struct dentry *d;

	char name[11];

	int i;



	for (i = 0; i < opp_table->path_count; i++) {

		snprintf(name, sizeof(name), "icc-path-%.1d", i);



		/* Create per-path directory */

		d = debugfs_create_dir(name, pdentry);



		debugfs_create_file("name", S_IRUGO, d, opp_table->paths[i],

				    &bw_name_fops);

		debugfs_create_u32("peak_bw", S_IRUGO, d,

				   &opp->bandwidth[i].peak);

		debugfs_create_u32("avg_bw", S_IRUGO, d,

				   &opp->bandwidth[i].avg);

	}

}



static void opp_debug_create_supplies(struct dev_pm_opp *opp,

				      struct opp_table *opp_table,

				      struct dentry *pdentry)
@@ -94,6 +135,7 @@ void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table) 
			     &opp->clock_latency_ns);



	opp_debug_create_supplies(opp, opp_table, d);

	opp_debug_create_bw(opp, opp_table, d);



	opp->dentry = d;

}

include/linux/interconnect.h

+6 −0
Original line number Diff line number Diff line
@@ -32,6 +32,7 @@ struct icc_path *of_icc_get_by_index(struct device *dev, int idx); 
void icc_put(struct icc_path *path);

int icc_set_bw(struct icc_path *path, u32 avg_bw, u32 peak_bw);

void icc_set_tag(struct icc_path *path, u32 tag);

const char *icc_get_name(struct icc_path *path);



#else
@@ -65,6 +66,11 @@ static inline void icc_set_tag(struct icc_path *path, u32 tag) 
{

}



static inline const char *icc_get_name(struct icc_path *path)

{

	return NULL;

}



#endif /* CONFIG_INTERCONNECT */



#endif /* __LINUX_INTERCONNECT_H */