1 // SPDX-License-Identifier: GPL-2.0-only
3  * Generic OPP debugfs interface
5  * Copyright (C) 2015-2016 Viresh Kumar <viresh.kumar@linaro.org>
17 #include "opp.h"
23 	if (dev->parent)  in opp_set_dev_name()
24 		snprintf(name, NAME_MAX, "%s-%s", dev_name(dev->parent),  in opp_set_dev_name()
30 void opp_debug_remove_one(struct dev_pm_opp *opp)  in opp_debug_remove_one()  argument
32 	debugfs_remove_recursive(opp->dentry);  in opp_debug_remove_one()
38 	struct icc_path *path = fp->private_data;  in bw_name_read()
53 static void opp_debug_create_bw(struct dev_pm_opp *opp,  in opp_debug_create_bw()  argument
61 	for (i = 0; i < opp_table->path_count; i++) {  in opp_debug_create_bw()
62 		snprintf(name, sizeof(name), "icc-path-%.1d", i);  in opp_debug_create_bw()
64 		/* Create per-path directory */  in opp_debug_create_bw()
67 		debugfs_create_file("name", S_IRUGO, d, opp_table->paths[i],  in opp_debug_create_bw()
70 				   &opp->bandwidth[i].peak);  in opp_debug_create_bw()
72 				   &opp->bandwidth[i].avg);  in opp_debug_create_bw()
76 static void opp_debug_create_supplies(struct dev_pm_opp *opp,  in opp_debug_create_supplies()  argument
83 	for (i = 0; i < opp_table->regulator_count; i++) {  in opp_debug_create_supplies()
86 		snprintf(name, sizeof(name), "supply-%d", i);  in opp_debug_create_supplies()
88 		/* Create per-opp directory */  in opp_debug_create_supplies()
92 				     &opp->supplies[i].u_volt);  in opp_debug_create_supplies()
95 				     &opp->supplies[i].u_volt_min);  in opp_debug_create_supplies()
98 				     &opp->supplies[i].u_volt_max);  in opp_debug_create_supplies()
101 				     &opp->supplies[i].u_amp);  in opp_debug_create_supplies()
105 void opp_debug_create_one(struct dev_pm_opp *opp, struct opp_table *opp_table)  in opp_debug_create_one()  argument
107 	struct dentry *pdentry = opp_table->dentry;  in opp_debug_create_one()
110 	char name[25];	/* 20 chars for 64 bit value + 5 (opp:\0) */  in opp_debug_create_one()
113 	 * Get directory name for OPP.  in opp_debug_create_one()
115 	 * - Normally rate is unique to each OPP, use it to get unique opp-name.  in opp_debug_create_one()
116 	 * - For some devices rate isn't available, use index instead.  in opp_debug_create_one()
118 	if (likely(opp->rate))  in opp_debug_create_one()
119 		id = opp->rate;  in opp_debug_create_one()
123 	snprintf(name, sizeof(name), "opp:%lu", id);  in opp_debug_create_one()
125 	/* Create per-opp directory */  in opp_debug_create_one()
128 	debugfs_create_bool("available", S_IRUGO, d, &opp->available);  in opp_debug_create_one()
129 	debugfs_create_bool("dynamic", S_IRUGO, d, &opp->dynamic);  in opp_debug_create_one()
130 	debugfs_create_bool("turbo", S_IRUGO, d, &opp->turbo);  in opp_debug_create_one()
131 	debugfs_create_bool("suspend", S_IRUGO, d, &opp->suspend);  in opp_debug_create_one()
132 	debugfs_create_u32("performance_state", S_IRUGO, d, &opp->pstate);  in opp_debug_create_one()
133 	debugfs_create_ulong("rate_hz", S_IRUGO, d, &opp->rate);  in opp_debug_create_one()
135 			     &opp->clock_latency_ns);  in opp_debug_create_one()
137 	opp_debug_create_supplies(opp, opp_table, d);  in opp_debug_create_one()
138 	opp_debug_create_bw(opp, opp_table, d);  in opp_debug_create_one()
140 	opp->dentry = d;  in opp_debug_create_one()
146 	const struct device *dev = opp_dev->dev;  in opp_list_debug_create_dir()
149 	opp_set_dev_name(dev, opp_table->dentry_name);  in opp_list_debug_create_dir()
152 	d = debugfs_create_dir(opp_table->dentry_name, rootdir);  in opp_list_debug_create_dir()
154 	opp_dev->dentry = d;  in opp_list_debug_create_dir()
155 	opp_table->dentry = d;  in opp_list_debug_create_dir()
163 	opp_set_dev_name(opp_dev->dev, name);  in opp_list_debug_create_link()
166 	opp_dev->dentry = debugfs_create_symlink(name, rootdir,  in opp_list_debug_create_link()
167 						 opp_table->dentry_name);  in opp_list_debug_create_link()
171  * opp_debug_register - add a device opp node to the debugfs 'opp' directory
172  * @opp_dev: opp-dev pointer for device
173  * @opp_table: the device-opp being added
175  * Dynamically adds device specific directory in debugfs 'opp' directory. If the
176  * device-opp is shared with other devices, then links will be created for all
181 	if (opp_table->dentry)  in opp_debug_register()
194 	/* Look for next opp-dev */  in opp_migrate_dentry()
195 	list_for_each_entry(new_dev, &opp_table->dev_list, node)  in opp_migrate_dentry()
200 	dev = new_dev->dev;  in opp_migrate_dentry()
201 	debugfs_remove_recursive(new_dev->dentry);  in opp_migrate_dentry()
203 	opp_set_dev_name(dev, opp_table->dentry_name);  in opp_migrate_dentry()
205 	dentry = debugfs_rename(rootdir, opp_dev->dentry, rootdir,  in opp_migrate_dentry()
206 				opp_table->dentry_name);  in opp_migrate_dentry()
209 			__func__, dev_name(opp_dev->dev), dev_name(dev));  in opp_migrate_dentry()
213 	new_dev->dentry = dentry;  in opp_migrate_dentry()
214 	opp_table->dentry = dentry;  in opp_migrate_dentry()
218  * opp_debug_unregister - remove a device opp node from debugfs opp directory
219  * @opp_dev: opp-dev pointer for device
220  * @opp_table: the device-opp being removed
222  * Dynamically removes device specific directory from debugfs 'opp' directory.
227 	if (opp_dev->dentry == opp_table->dentry) {  in opp_debug_unregister()
229 		if (!list_is_singular(&opp_table->dev_list)) {  in opp_debug_unregister()
233 		opp_table->dentry = NULL;  in opp_debug_unregister()
236 	debugfs_remove_recursive(opp_dev->dentry);  in opp_debug_unregister()
239 	opp_dev->dentry = NULL;  in opp_debug_unregister()
244 	/* Create /sys/kernel/debug/opp directory */  in opp_debug_init()
245 	rootdir = debugfs_create_dir("opp", NULL);  in opp_debug_init()