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1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Provides code common for host and device side USB.
4 *
5 * If either host side (ie. CONFIG_USB=y) or device side USB stack
6 * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is
7 * compiled-in as well. Otherwise, if either of the two stacks is
8 * compiled as module, this file is compiled as module as well.
9 */
10
11#include <linux/kernel.h>
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/usb/ch9.h>
15#include <linux/usb/of.h>
16#include <linux/usb/otg.h>
17#include <linux/of_platform.h>
18#include <linux/debugfs.h>
19#include "common.h"
20
21static const char *const ep_type_names[] = {
22 [USB_ENDPOINT_XFER_CONTROL] = "ctrl",
23 [USB_ENDPOINT_XFER_ISOC] = "isoc",
24 [USB_ENDPOINT_XFER_BULK] = "bulk",
25 [USB_ENDPOINT_XFER_INT] = "intr",
26};
27
28/**
29 * usb_ep_type_string() - Returns human readable-name of the endpoint type.
30 * @ep_type: The endpoint type to return human-readable name for. If it's not
31 * any of the types: USB_ENDPOINT_XFER_{CONTROL, ISOC, BULK, INT},
32 * usually got by usb_endpoint_type(), the string 'unknown' will be returned.
33 */
34const char *usb_ep_type_string(int ep_type)
35{
36 if (ep_type < 0 || ep_type >= ARRAY_SIZE(ep_type_names))
37 return "unknown";
38
39 return ep_type_names[ep_type];
40}
41EXPORT_SYMBOL_GPL(usb_ep_type_string);
42
43const char *usb_otg_state_string(enum usb_otg_state state)
44{
45 static const char *const names[] = {
46 [OTG_STATE_A_IDLE] = "a_idle",
47 [OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise",
48 [OTG_STATE_A_WAIT_BCON] = "a_wait_bcon",
49 [OTG_STATE_A_HOST] = "a_host",
50 [OTG_STATE_A_SUSPEND] = "a_suspend",
51 [OTG_STATE_A_PERIPHERAL] = "a_peripheral",
52 [OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall",
53 [OTG_STATE_A_VBUS_ERR] = "a_vbus_err",
54 [OTG_STATE_B_IDLE] = "b_idle",
55 [OTG_STATE_B_SRP_INIT] = "b_srp_init",
56 [OTG_STATE_B_PERIPHERAL] = "b_peripheral",
57 [OTG_STATE_B_WAIT_ACON] = "b_wait_acon",
58 [OTG_STATE_B_HOST] = "b_host",
59 };
60
61 if (state < 0 || state >= ARRAY_SIZE(names))
62 return "UNDEFINED";
63
64 return names[state];
65}
66EXPORT_SYMBOL_GPL(usb_otg_state_string);
67
68static const char *const speed_names[] = {
69 [USB_SPEED_UNKNOWN] = "UNKNOWN",
70 [USB_SPEED_LOW] = "low-speed",
71 [USB_SPEED_FULL] = "full-speed",
72 [USB_SPEED_HIGH] = "high-speed",
73 [USB_SPEED_WIRELESS] = "wireless",
74 [USB_SPEED_SUPER] = "super-speed",
75 [USB_SPEED_SUPER_PLUS] = "super-speed-plus",
76};
77
78static const char *const ssp_rate[] = {
79 [USB_SSP_GEN_UNKNOWN] = "UNKNOWN",
80 [USB_SSP_GEN_2x1] = "super-speed-plus-gen2x1",
81 [USB_SSP_GEN_1x2] = "super-speed-plus-gen1x2",
82 [USB_SSP_GEN_2x2] = "super-speed-plus-gen2x2",
83};
84
85/**
86 * usb_speed_string() - Returns human readable-name of the speed.
87 * @speed: The speed to return human-readable name for. If it's not
88 * any of the speeds defined in usb_device_speed enum, string for
89 * USB_SPEED_UNKNOWN will be returned.
90 */
91const char *usb_speed_string(enum usb_device_speed speed)
92{
93 if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
94 speed = USB_SPEED_UNKNOWN;
95 return speed_names[speed];
96}
97EXPORT_SYMBOL_GPL(usb_speed_string);
98
99/**
100 * usb_get_maximum_speed - Get maximum requested speed for a given USB
101 * controller.
102 * @dev: Pointer to the given USB controller device
103 *
104 * The function gets the maximum speed string from property "maximum-speed",
105 * and returns the corresponding enum usb_device_speed.
106 */
107enum usb_device_speed usb_get_maximum_speed(struct device *dev)
108{
109 const char *maximum_speed;
110 int ret;
111
112 ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);
113 if (ret < 0)
114 return USB_SPEED_UNKNOWN;
115
116 ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
117 if (ret > 0)
118 return USB_SPEED_SUPER_PLUS;
119
120 ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
121 return (ret < 0) ? USB_SPEED_UNKNOWN : ret;
122}
123EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
124
125/**
126 * usb_get_maximum_ssp_rate - Get the signaling rate generation and lane count
127 * of a SuperSpeed Plus capable device.
128 * @dev: Pointer to the given USB controller device
129 *
130 * If the string from "maximum-speed" property is super-speed-plus-genXxY where
131 * 'X' is the generation number and 'Y' is the number of lanes, then this
132 * function returns the corresponding enum usb_ssp_rate.
133 */
134enum usb_ssp_rate usb_get_maximum_ssp_rate(struct device *dev)
135{
136 const char *maximum_speed;
137 int ret;
138
139 ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);
140 if (ret < 0)
141 return USB_SSP_GEN_UNKNOWN;
142
143 ret = match_string(ssp_rate, ARRAY_SIZE(ssp_rate), maximum_speed);
144 return (ret < 0) ? USB_SSP_GEN_UNKNOWN : ret;
145}
146EXPORT_SYMBOL_GPL(usb_get_maximum_ssp_rate);
147
148/**
149 * usb_state_string - Returns human readable name for the state.
150 * @state: The state to return a human-readable name for. If it's not
151 * any of the states devices in usb_device_state_string enum,
152 * the string UNKNOWN will be returned.
153 */
154const char *usb_state_string(enum usb_device_state state)
155{
156 static const char *const names[] = {
157 [USB_STATE_NOTATTACHED] = "not attached",
158 [USB_STATE_ATTACHED] = "attached",
159 [USB_STATE_POWERED] = "powered",
160 [USB_STATE_RECONNECTING] = "reconnecting",
161 [USB_STATE_UNAUTHENTICATED] = "unauthenticated",
162 [USB_STATE_DEFAULT] = "default",
163 [USB_STATE_ADDRESS] = "addressed",
164 [USB_STATE_CONFIGURED] = "configured",
165 [USB_STATE_SUSPENDED] = "suspended",
166 };
167
168 if (state < 0 || state >= ARRAY_SIZE(names))
169 return "UNKNOWN";
170
171 return names[state];
172}
173EXPORT_SYMBOL_GPL(usb_state_string);
174
175static const char *const usb_dr_modes[] = {
176 [USB_DR_MODE_UNKNOWN] = "",
177 [USB_DR_MODE_HOST] = "host",
178 [USB_DR_MODE_PERIPHERAL] = "peripheral",
179 [USB_DR_MODE_OTG] = "otg",
180};
181
182static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
183{
184 int ret;
185
186 ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str);
187 return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret;
188}
189
190enum usb_dr_mode usb_get_dr_mode(struct device *dev)
191{
192 const char *dr_mode;
193 int err;
194
195 err = device_property_read_string(dev, "dr_mode", &dr_mode);
196 if (err < 0)
197 return USB_DR_MODE_UNKNOWN;
198
199 return usb_get_dr_mode_from_string(dr_mode);
200}
201EXPORT_SYMBOL_GPL(usb_get_dr_mode);
202
203/**
204 * usb_decode_interval - Decode bInterval into the time expressed in 1us unit
205 * @epd: The descriptor of the endpoint
206 * @speed: The speed that the endpoint works as
207 *
208 * Function returns the interval expressed in 1us unit for servicing
209 * endpoint for data transfers.
210 */
211unsigned int usb_decode_interval(const struct usb_endpoint_descriptor *epd,
212 enum usb_device_speed speed)
213{
214 unsigned int interval = 0;
215
216 switch (usb_endpoint_type(epd)) {
217 case USB_ENDPOINT_XFER_CONTROL:
218 /* uframes per NAK */
219 if (speed == USB_SPEED_HIGH)
220 interval = epd->bInterval;
221 break;
222 case USB_ENDPOINT_XFER_ISOC:
223 interval = 1 << (epd->bInterval - 1);
224 break;
225 case USB_ENDPOINT_XFER_BULK:
226 /* uframes per NAK */
227 if (speed == USB_SPEED_HIGH && usb_endpoint_dir_out(epd))
228 interval = epd->bInterval;
229 break;
230 case USB_ENDPOINT_XFER_INT:
231 if (speed >= USB_SPEED_HIGH)
232 interval = 1 << (epd->bInterval - 1);
233 else
234 interval = epd->bInterval;
235 break;
236 }
237
238 interval *= (speed >= USB_SPEED_HIGH) ? 125 : 1000;
239
240 return interval;
241}
242EXPORT_SYMBOL_GPL(usb_decode_interval);
243
244#ifdef CONFIG_OF
245/**
246 * of_usb_get_dr_mode_by_phy - Get dual role mode for the controller device
247 * which is associated with the given phy device_node
248 * @np: Pointer to the given phy device_node
249 * @arg0: phandle args[0] for phy's with #phy-cells >= 1, or -1 for
250 * phys which do not have phy-cells
251 *
252 * In dts a usb controller associates with phy devices. The function gets
253 * the string from property 'dr_mode' of the controller associated with the
254 * given phy device node, and returns the correspondig enum usb_dr_mode.
255 */
256enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0)
257{
258 struct device_node *controller = NULL;
259 struct of_phandle_args args;
260 const char *dr_mode;
261 int index;
262 int err;
263
264 do {
265 controller = of_find_node_with_property(controller, "phys");
266 if (!of_device_is_available(controller))
267 continue;
268 index = 0;
269 do {
270 if (arg0 == -1) {
271 args.np = of_parse_phandle(controller, "phys",
272 index);
273 args.args_count = 0;
274 } else {
275 err = of_parse_phandle_with_args(controller,
276 "phys", "#phy-cells",
277 index, &args);
278 if (err)
279 break;
280 }
281
282 of_node_put(args.np);
283 if (args.np == np && (args.args_count == 0 ||
284 args.args[0] == arg0))
285 goto finish;
286 index++;
287 } while (args.np);
288 } while (controller);
289
290finish:
291 err = of_property_read_string(controller, "dr_mode", &dr_mode);
292 of_node_put(controller);
293
294 if (err < 0)
295 return USB_DR_MODE_UNKNOWN;
296
297 return usb_get_dr_mode_from_string(dr_mode);
298}
299EXPORT_SYMBOL_GPL(of_usb_get_dr_mode_by_phy);
300
301/**
302 * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported
303 * for given targeted hosts (non-PC hosts)
304 * @np: Pointer to the given device_node
305 *
306 * The function gets if the targeted hosts support TPL or not
307 */
308bool of_usb_host_tpl_support(struct device_node *np)
309{
310 return of_property_read_bool(np, "tpl-support");
311}
312EXPORT_SYMBOL_GPL(of_usb_host_tpl_support);
313
314/**
315 * of_usb_update_otg_caps - to update usb otg capabilities according to
316 * the passed properties in DT.
317 * @np: Pointer to the given device_node
318 * @otg_caps: Pointer to the target usb_otg_caps to be set
319 *
320 * The function updates the otg capabilities
321 */
322int of_usb_update_otg_caps(struct device_node *np,
323 struct usb_otg_caps *otg_caps)
324{
325 u32 otg_rev;
326
327 if (!otg_caps)
328 return -EINVAL;
329
330 if (!of_property_read_u32(np, "otg-rev", &otg_rev)) {
331 switch (otg_rev) {
332 case 0x0100:
333 case 0x0120:
334 case 0x0130:
335 case 0x0200:
336 /* Choose the lesser one if it's already been set */
337 if (otg_caps->otg_rev)
338 otg_caps->otg_rev = min_t(u16, otg_rev,
339 otg_caps->otg_rev);
340 else
341 otg_caps->otg_rev = otg_rev;
342 break;
343 default:
344 pr_err("%pOF: unsupported otg-rev: 0x%x\n",
345 np, otg_rev);
346 return -EINVAL;
347 }
348 } else {
349 /*
350 * otg-rev is mandatory for otg properties, if not passed
351 * we set it to be 0 and assume it's a legacy otg device.
352 * Non-dt platform can set it afterwards.
353 */
354 otg_caps->otg_rev = 0;
355 }
356
357 if (of_property_read_bool(np, "hnp-disable"))
358 otg_caps->hnp_support = false;
359 if (of_property_read_bool(np, "srp-disable"))
360 otg_caps->srp_support = false;
361 if (of_property_read_bool(np, "adp-disable") ||
362 (otg_caps->otg_rev < 0x0200))
363 otg_caps->adp_support = false;
364
365 return 0;
366}
367EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
368
369/**
370 * usb_of_get_companion_dev - Find the companion device
371 * @dev: the device pointer to find a companion
372 *
373 * Find the companion device from platform bus.
374 *
375 * Takes a reference to the returned struct device which needs to be dropped
376 * after use.
377 *
378 * Return: On success, a pointer to the companion device, %NULL on failure.
379 */
380struct device *usb_of_get_companion_dev(struct device *dev)
381{
382 struct device_node *node;
383 struct platform_device *pdev = NULL;
384
385 node = of_parse_phandle(dev->of_node, "companion", 0);
386 if (node)
387 pdev = of_find_device_by_node(node);
388
389 of_node_put(node);
390
391 return pdev ? &pdev->dev : NULL;
392}
393EXPORT_SYMBOL_GPL(usb_of_get_companion_dev);
394#endif
395
396struct dentry *usb_debug_root;
397EXPORT_SYMBOL_GPL(usb_debug_root);
398
399static int __init usb_common_init(void)
400{
401 usb_debug_root = debugfs_create_dir("usb", NULL);
402 ledtrig_usb_init();
403 return 0;
404}
405
406static void __exit usb_common_exit(void)
407{
408 ledtrig_usb_exit();
409 debugfs_remove_recursive(usb_debug_root);
410}
411
412subsys_initcall(usb_common_init);
413module_exit(usb_common_exit);
414
415MODULE_LICENSE("GPL");
1/*
2 * Provides code common for host and device side USB.
3 *
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License as
6 * published by the Free Software Foundation, version 2.
7 *
8 * If either host side (ie. CONFIG_USB=y) or device side USB stack
9 * (ie. CONFIG_USB_GADGET=y) is compiled in the kernel, this module is
10 * compiled-in as well. Otherwise, if either of the two stacks is
11 * compiled as module, this file is compiled as module as well.
12 */
13
14#include <linux/kernel.h>
15#include <linux/module.h>
16#include <linux/of.h>
17#include <linux/usb/ch9.h>
18#include <linux/usb/of.h>
19#include <linux/usb/otg.h>
20#include <linux/of_platform.h>
21
22const char *usb_otg_state_string(enum usb_otg_state state)
23{
24 static const char *const names[] = {
25 [OTG_STATE_A_IDLE] = "a_idle",
26 [OTG_STATE_A_WAIT_VRISE] = "a_wait_vrise",
27 [OTG_STATE_A_WAIT_BCON] = "a_wait_bcon",
28 [OTG_STATE_A_HOST] = "a_host",
29 [OTG_STATE_A_SUSPEND] = "a_suspend",
30 [OTG_STATE_A_PERIPHERAL] = "a_peripheral",
31 [OTG_STATE_A_WAIT_VFALL] = "a_wait_vfall",
32 [OTG_STATE_A_VBUS_ERR] = "a_vbus_err",
33 [OTG_STATE_B_IDLE] = "b_idle",
34 [OTG_STATE_B_SRP_INIT] = "b_srp_init",
35 [OTG_STATE_B_PERIPHERAL] = "b_peripheral",
36 [OTG_STATE_B_WAIT_ACON] = "b_wait_acon",
37 [OTG_STATE_B_HOST] = "b_host",
38 };
39
40 if (state < 0 || state >= ARRAY_SIZE(names))
41 return "UNDEFINED";
42
43 return names[state];
44}
45EXPORT_SYMBOL_GPL(usb_otg_state_string);
46
47static const char *const speed_names[] = {
48 [USB_SPEED_UNKNOWN] = "UNKNOWN",
49 [USB_SPEED_LOW] = "low-speed",
50 [USB_SPEED_FULL] = "full-speed",
51 [USB_SPEED_HIGH] = "high-speed",
52 [USB_SPEED_WIRELESS] = "wireless",
53 [USB_SPEED_SUPER] = "super-speed",
54 [USB_SPEED_SUPER_PLUS] = "super-speed-plus",
55};
56
57const char *usb_speed_string(enum usb_device_speed speed)
58{
59 if (speed < 0 || speed >= ARRAY_SIZE(speed_names))
60 speed = USB_SPEED_UNKNOWN;
61 return speed_names[speed];
62}
63EXPORT_SYMBOL_GPL(usb_speed_string);
64
65enum usb_device_speed usb_get_maximum_speed(struct device *dev)
66{
67 const char *maximum_speed;
68 int ret;
69
70 ret = device_property_read_string(dev, "maximum-speed", &maximum_speed);
71 if (ret < 0)
72 return USB_SPEED_UNKNOWN;
73
74 ret = match_string(speed_names, ARRAY_SIZE(speed_names), maximum_speed);
75
76 return (ret < 0) ? USB_SPEED_UNKNOWN : ret;
77}
78EXPORT_SYMBOL_GPL(usb_get_maximum_speed);
79
80const char *usb_state_string(enum usb_device_state state)
81{
82 static const char *const names[] = {
83 [USB_STATE_NOTATTACHED] = "not attached",
84 [USB_STATE_ATTACHED] = "attached",
85 [USB_STATE_POWERED] = "powered",
86 [USB_STATE_RECONNECTING] = "reconnecting",
87 [USB_STATE_UNAUTHENTICATED] = "unauthenticated",
88 [USB_STATE_DEFAULT] = "default",
89 [USB_STATE_ADDRESS] = "addressed",
90 [USB_STATE_CONFIGURED] = "configured",
91 [USB_STATE_SUSPENDED] = "suspended",
92 };
93
94 if (state < 0 || state >= ARRAY_SIZE(names))
95 return "UNKNOWN";
96
97 return names[state];
98}
99EXPORT_SYMBOL_GPL(usb_state_string);
100
101static const char *const usb_dr_modes[] = {
102 [USB_DR_MODE_UNKNOWN] = "",
103 [USB_DR_MODE_HOST] = "host",
104 [USB_DR_MODE_PERIPHERAL] = "peripheral",
105 [USB_DR_MODE_OTG] = "otg",
106};
107
108static enum usb_dr_mode usb_get_dr_mode_from_string(const char *str)
109{
110 int ret;
111
112 ret = match_string(usb_dr_modes, ARRAY_SIZE(usb_dr_modes), str);
113 return (ret < 0) ? USB_DR_MODE_UNKNOWN : ret;
114}
115
116enum usb_dr_mode usb_get_dr_mode(struct device *dev)
117{
118 const char *dr_mode;
119 int err;
120
121 err = device_property_read_string(dev, "dr_mode", &dr_mode);
122 if (err < 0)
123 return USB_DR_MODE_UNKNOWN;
124
125 return usb_get_dr_mode_from_string(dr_mode);
126}
127EXPORT_SYMBOL_GPL(usb_get_dr_mode);
128
129#ifdef CONFIG_OF
130/**
131 * of_usb_get_dr_mode_by_phy - Get dual role mode for the controller device
132 * which is associated with the given phy device_node
133 * @np: Pointer to the given phy device_node
134 * @arg0: phandle args[0] for phy's with #phy-cells >= 1, or -1 for
135 * phys which do not have phy-cells
136 *
137 * In dts a usb controller associates with phy devices. The function gets
138 * the string from property 'dr_mode' of the controller associated with the
139 * given phy device node, and returns the correspondig enum usb_dr_mode.
140 */
141enum usb_dr_mode of_usb_get_dr_mode_by_phy(struct device_node *np, int arg0)
142{
143 struct device_node *controller = NULL;
144 struct of_phandle_args args;
145 const char *dr_mode;
146 int index;
147 int err;
148
149 do {
150 controller = of_find_node_with_property(controller, "phys");
151 index = 0;
152 do {
153 if (arg0 == -1) {
154 args.np = of_parse_phandle(controller, "phys",
155 index);
156 args.args_count = 0;
157 } else {
158 err = of_parse_phandle_with_args(controller,
159 "phys", "#phy-cells",
160 index, &args);
161 if (err)
162 break;
163 }
164
165 of_node_put(args.np);
166 if (args.np == np && (args.args_count == 0 ||
167 args.args[0] == arg0))
168 goto finish;
169 index++;
170 } while (args.np);
171 } while (controller);
172
173finish:
174 err = of_property_read_string(controller, "dr_mode", &dr_mode);
175 of_node_put(controller);
176
177 if (err < 0)
178 return USB_DR_MODE_UNKNOWN;
179
180 return usb_get_dr_mode_from_string(dr_mode);
181}
182EXPORT_SYMBOL_GPL(of_usb_get_dr_mode_by_phy);
183
184/**
185 * of_usb_host_tpl_support - to get if Targeted Peripheral List is supported
186 * for given targeted hosts (non-PC hosts)
187 * @np: Pointer to the given device_node
188 *
189 * The function gets if the targeted hosts support TPL or not
190 */
191bool of_usb_host_tpl_support(struct device_node *np)
192{
193 if (of_find_property(np, "tpl-support", NULL))
194 return true;
195
196 return false;
197}
198EXPORT_SYMBOL_GPL(of_usb_host_tpl_support);
199
200/**
201 * of_usb_update_otg_caps - to update usb otg capabilities according to
202 * the passed properties in DT.
203 * @np: Pointer to the given device_node
204 * @otg_caps: Pointer to the target usb_otg_caps to be set
205 *
206 * The function updates the otg capabilities
207 */
208int of_usb_update_otg_caps(struct device_node *np,
209 struct usb_otg_caps *otg_caps)
210{
211 u32 otg_rev;
212
213 if (!otg_caps)
214 return -EINVAL;
215
216 if (!of_property_read_u32(np, "otg-rev", &otg_rev)) {
217 switch (otg_rev) {
218 case 0x0100:
219 case 0x0120:
220 case 0x0130:
221 case 0x0200:
222 /* Choose the lesser one if it's already been set */
223 if (otg_caps->otg_rev)
224 otg_caps->otg_rev = min_t(u16, otg_rev,
225 otg_caps->otg_rev);
226 else
227 otg_caps->otg_rev = otg_rev;
228 break;
229 default:
230 pr_err("%s: unsupported otg-rev: 0x%x\n",
231 np->full_name, otg_rev);
232 return -EINVAL;
233 }
234 } else {
235 /*
236 * otg-rev is mandatory for otg properties, if not passed
237 * we set it to be 0 and assume it's a legacy otg device.
238 * Non-dt platform can set it afterwards.
239 */
240 otg_caps->otg_rev = 0;
241 }
242
243 if (of_find_property(np, "hnp-disable", NULL))
244 otg_caps->hnp_support = false;
245 if (of_find_property(np, "srp-disable", NULL))
246 otg_caps->srp_support = false;
247 if (of_find_property(np, "adp-disable", NULL) ||
248 (otg_caps->otg_rev < 0x0200))
249 otg_caps->adp_support = false;
250
251 return 0;
252}
253EXPORT_SYMBOL_GPL(of_usb_update_otg_caps);
254
255#endif
256
257MODULE_LICENSE("GPL");