Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 1 | /* |
| 2 | * phy-core.c -- Generic Phy framework. |
| 3 | * |
| 4 | * Copyright (C) 2013 Texas Instruments Incorporated - http://www.ti.com |
| 5 | * |
| 6 | * Author: Kishon Vijay Abraham I <kishon@ti.com> |
| 7 | * |
| 8 | * This program is free software; you can redistribute it and/or modify it |
| 9 | * under the terms of the GNU General Public License as published by the |
| 10 | * Free Software Foundation; either version 2 of the License, or (at your |
| 11 | * option) any later version. |
| 12 | */ |
| 13 | |
| 14 | #include <linux/kernel.h> |
| 15 | #include <linux/export.h> |
| 16 | #include <linux/module.h> |
| 17 | #include <linux/err.h> |
| 18 | #include <linux/device.h> |
| 19 | #include <linux/slab.h> |
| 20 | #include <linux/of.h> |
| 21 | #include <linux/phy/phy.h> |
| 22 | #include <linux/idr.h> |
| 23 | #include <linux/pm_runtime.h> |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 24 | #include <linux/regulator/consumer.h> |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 25 | |
| 26 | static struct class *phy_class; |
| 27 | static DEFINE_MUTEX(phy_provider_mutex); |
| 28 | static LIST_HEAD(phy_provider_list); |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame^] | 29 | static LIST_HEAD(phys); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 30 | static DEFINE_IDA(phy_ida); |
| 31 | |
| 32 | static void devm_phy_release(struct device *dev, void *res) |
| 33 | { |
| 34 | struct phy *phy = *(struct phy **)res; |
| 35 | |
| 36 | phy_put(phy); |
| 37 | } |
| 38 | |
| 39 | static void devm_phy_provider_release(struct device *dev, void *res) |
| 40 | { |
| 41 | struct phy_provider *phy_provider = *(struct phy_provider **)res; |
| 42 | |
| 43 | of_phy_provider_unregister(phy_provider); |
| 44 | } |
| 45 | |
| 46 | static void devm_phy_consume(struct device *dev, void *res) |
| 47 | { |
| 48 | struct phy *phy = *(struct phy **)res; |
| 49 | |
| 50 | phy_destroy(phy); |
| 51 | } |
| 52 | |
| 53 | static int devm_phy_match(struct device *dev, void *res, void *match_data) |
| 54 | { |
| 55 | return res == match_data; |
| 56 | } |
| 57 | |
| 58 | static struct phy *phy_lookup(struct device *device, const char *port) |
| 59 | { |
| 60 | unsigned int count; |
| 61 | struct phy *phy; |
| 62 | struct device *dev; |
| 63 | struct phy_consumer *consumers; |
| 64 | struct class_dev_iter iter; |
| 65 | |
| 66 | class_dev_iter_init(&iter, phy_class, NULL, NULL); |
| 67 | while ((dev = class_dev_iter_next(&iter))) { |
| 68 | phy = to_phy(dev); |
Sergei Shtylyov | 743bb38 | 2014-04-19 08:51:43 +0530 | [diff] [blame] | 69 | |
| 70 | if (!phy->init_data) |
| 71 | continue; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 72 | count = phy->init_data->num_consumers; |
| 73 | consumers = phy->init_data->consumers; |
| 74 | while (count--) { |
| 75 | if (!strcmp(consumers->dev_name, dev_name(device)) && |
| 76 | !strcmp(consumers->port, port)) { |
| 77 | class_dev_iter_exit(&iter); |
| 78 | return phy; |
| 79 | } |
| 80 | consumers++; |
| 81 | } |
| 82 | } |
| 83 | |
| 84 | class_dev_iter_exit(&iter); |
| 85 | return ERR_PTR(-ENODEV); |
| 86 | } |
| 87 | |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame^] | 88 | /** |
| 89 | * phy_create_lookup() - allocate and register PHY/device association |
| 90 | * @phy: the phy of the association |
| 91 | * @con_id: connection ID string on device |
| 92 | * @dev_id: the device of the association |
| 93 | * |
| 94 | * Creates and registers phy_lookup entry. |
| 95 | */ |
| 96 | int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id) |
| 97 | { |
| 98 | struct phy_lookup *pl; |
| 99 | |
| 100 | if (!phy || !dev_id || !con_id) |
| 101 | return -EINVAL; |
| 102 | |
| 103 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); |
| 104 | if (!pl) |
| 105 | return -ENOMEM; |
| 106 | |
| 107 | pl->dev_id = dev_id; |
| 108 | pl->con_id = con_id; |
| 109 | pl->phy = phy; |
| 110 | |
| 111 | mutex_lock(&phy_provider_mutex); |
| 112 | list_add_tail(&pl->node, &phys); |
| 113 | mutex_unlock(&phy_provider_mutex); |
| 114 | |
| 115 | return 0; |
| 116 | } |
| 117 | EXPORT_SYMBOL_GPL(phy_create_lookup); |
| 118 | |
| 119 | /** |
| 120 | * phy_remove_lookup() - find and remove PHY/device association |
| 121 | * @phy: the phy of the association |
| 122 | * @con_id: connection ID string on device |
| 123 | * @dev_id: the device of the association |
| 124 | * |
| 125 | * Finds and unregisters phy_lookup entry that was created with |
| 126 | * phy_create_lookup(). |
| 127 | */ |
| 128 | void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id) |
| 129 | { |
| 130 | struct phy_lookup *pl; |
| 131 | |
| 132 | if (!phy || !dev_id || !con_id) |
| 133 | return; |
| 134 | |
| 135 | mutex_lock(&phy_provider_mutex); |
| 136 | list_for_each_entry(pl, &phys, node) |
| 137 | if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) && |
| 138 | !strcmp(pl->con_id, con_id)) { |
| 139 | list_del(&pl->node); |
| 140 | kfree(pl); |
| 141 | break; |
| 142 | } |
| 143 | mutex_unlock(&phy_provider_mutex); |
| 144 | } |
| 145 | EXPORT_SYMBOL_GPL(phy_remove_lookup); |
| 146 | |
| 147 | static struct phy *phy_find(struct device *dev, const char *con_id) |
| 148 | { |
| 149 | const char *dev_id = dev_name(dev); |
| 150 | struct phy_lookup *p, *pl = NULL; |
| 151 | struct phy *phy; |
| 152 | |
| 153 | mutex_lock(&phy_provider_mutex); |
| 154 | list_for_each_entry(p, &phys, node) |
| 155 | if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) { |
| 156 | pl = p; |
| 157 | break; |
| 158 | } |
| 159 | mutex_unlock(&phy_provider_mutex); |
| 160 | |
| 161 | phy = pl ? pl->phy : ERR_PTR(-ENODEV); |
| 162 | |
| 163 | /* fall-back to the old lookup method for now */ |
| 164 | if (IS_ERR(phy)) |
| 165 | phy = phy_lookup(dev, con_id); |
| 166 | return phy; |
| 167 | } |
| 168 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 169 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) |
| 170 | { |
| 171 | struct phy_provider *phy_provider; |
Kishon Vijay Abraham I | 2a4c370 | 2014-07-14 15:55:01 +0530 | [diff] [blame] | 172 | struct device_node *child; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 173 | |
| 174 | list_for_each_entry(phy_provider, &phy_provider_list, list) { |
| 175 | if (phy_provider->dev->of_node == node) |
| 176 | return phy_provider; |
Kishon Vijay Abraham I | 2a4c370 | 2014-07-14 15:55:01 +0530 | [diff] [blame] | 177 | |
| 178 | for_each_child_of_node(phy_provider->dev->of_node, child) |
| 179 | if (child == node) |
| 180 | return phy_provider; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 181 | } |
| 182 | |
| 183 | return ERR_PTR(-EPROBE_DEFER); |
| 184 | } |
| 185 | |
| 186 | int phy_pm_runtime_get(struct phy *phy) |
| 187 | { |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 188 | int ret; |
| 189 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 190 | if (!pm_runtime_enabled(&phy->dev)) |
| 191 | return -ENOTSUPP; |
| 192 | |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 193 | ret = pm_runtime_get(&phy->dev); |
| 194 | if (ret < 0 && ret != -EINPROGRESS) |
| 195 | pm_runtime_put_noidle(&phy->dev); |
| 196 | |
| 197 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 198 | } |
| 199 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); |
| 200 | |
| 201 | int phy_pm_runtime_get_sync(struct phy *phy) |
| 202 | { |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 203 | int ret; |
| 204 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 205 | if (!pm_runtime_enabled(&phy->dev)) |
| 206 | return -ENOTSUPP; |
| 207 | |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 208 | ret = pm_runtime_get_sync(&phy->dev); |
| 209 | if (ret < 0) |
| 210 | pm_runtime_put_sync(&phy->dev); |
| 211 | |
| 212 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 213 | } |
| 214 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); |
| 215 | |
| 216 | int phy_pm_runtime_put(struct phy *phy) |
| 217 | { |
| 218 | if (!pm_runtime_enabled(&phy->dev)) |
| 219 | return -ENOTSUPP; |
| 220 | |
| 221 | return pm_runtime_put(&phy->dev); |
| 222 | } |
| 223 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); |
| 224 | |
| 225 | int phy_pm_runtime_put_sync(struct phy *phy) |
| 226 | { |
| 227 | if (!pm_runtime_enabled(&phy->dev)) |
| 228 | return -ENOTSUPP; |
| 229 | |
| 230 | return pm_runtime_put_sync(&phy->dev); |
| 231 | } |
| 232 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); |
| 233 | |
| 234 | void phy_pm_runtime_allow(struct phy *phy) |
| 235 | { |
| 236 | if (!pm_runtime_enabled(&phy->dev)) |
| 237 | return; |
| 238 | |
| 239 | pm_runtime_allow(&phy->dev); |
| 240 | } |
| 241 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); |
| 242 | |
| 243 | void phy_pm_runtime_forbid(struct phy *phy) |
| 244 | { |
| 245 | if (!pm_runtime_enabled(&phy->dev)) |
| 246 | return; |
| 247 | |
| 248 | pm_runtime_forbid(&phy->dev); |
| 249 | } |
| 250 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); |
| 251 | |
| 252 | int phy_init(struct phy *phy) |
| 253 | { |
| 254 | int ret; |
| 255 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 256 | if (!phy) |
| 257 | return 0; |
| 258 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 259 | ret = phy_pm_runtime_get_sync(phy); |
| 260 | if (ret < 0 && ret != -ENOTSUPP) |
| 261 | return ret; |
| 262 | |
| 263 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 264 | if (phy->init_count == 0 && phy->ops->init) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 265 | ret = phy->ops->init(phy); |
| 266 | if (ret < 0) { |
| 267 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); |
| 268 | goto out; |
| 269 | } |
Hans de Goede | 767a1b5 | 2014-02-17 14:29:23 +0530 | [diff] [blame] | 270 | } else { |
| 271 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 272 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 273 | ++phy->init_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 274 | |
| 275 | out: |
| 276 | mutex_unlock(&phy->mutex); |
| 277 | phy_pm_runtime_put(phy); |
| 278 | return ret; |
| 279 | } |
| 280 | EXPORT_SYMBOL_GPL(phy_init); |
| 281 | |
| 282 | int phy_exit(struct phy *phy) |
| 283 | { |
| 284 | int ret; |
| 285 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 286 | if (!phy) |
| 287 | return 0; |
| 288 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 289 | ret = phy_pm_runtime_get_sync(phy); |
| 290 | if (ret < 0 && ret != -ENOTSUPP) |
| 291 | return ret; |
| 292 | |
| 293 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 294 | if (phy->init_count == 1 && phy->ops->exit) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 295 | ret = phy->ops->exit(phy); |
| 296 | if (ret < 0) { |
| 297 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); |
| 298 | goto out; |
| 299 | } |
| 300 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 301 | --phy->init_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 302 | |
| 303 | out: |
| 304 | mutex_unlock(&phy->mutex); |
| 305 | phy_pm_runtime_put(phy); |
| 306 | return ret; |
| 307 | } |
| 308 | EXPORT_SYMBOL_GPL(phy_exit); |
| 309 | |
| 310 | int phy_power_on(struct phy *phy) |
| 311 | { |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 312 | int ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 313 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 314 | if (!phy) |
| 315 | return 0; |
| 316 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 317 | if (phy->pwr) { |
| 318 | ret = regulator_enable(phy->pwr); |
| 319 | if (ret) |
| 320 | return ret; |
| 321 | } |
| 322 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 323 | ret = phy_pm_runtime_get_sync(phy); |
| 324 | if (ret < 0 && ret != -ENOTSUPP) |
| 325 | return ret; |
| 326 | |
| 327 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 328 | if (phy->power_count == 0 && phy->ops->power_on) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 329 | ret = phy->ops->power_on(phy); |
| 330 | if (ret < 0) { |
| 331 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); |
| 332 | goto out; |
| 333 | } |
Hans de Goede | 767a1b5 | 2014-02-17 14:29:23 +0530 | [diff] [blame] | 334 | } else { |
| 335 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 336 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 337 | ++phy->power_count; |
| 338 | mutex_unlock(&phy->mutex); |
| 339 | return 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 340 | |
| 341 | out: |
| 342 | mutex_unlock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 343 | phy_pm_runtime_put_sync(phy); |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 344 | if (phy->pwr) |
| 345 | regulator_disable(phy->pwr); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 346 | |
| 347 | return ret; |
| 348 | } |
| 349 | EXPORT_SYMBOL_GPL(phy_power_on); |
| 350 | |
| 351 | int phy_power_off(struct phy *phy) |
| 352 | { |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 353 | int ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 354 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 355 | if (!phy) |
| 356 | return 0; |
| 357 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 358 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 359 | if (phy->power_count == 1 && phy->ops->power_off) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 360 | ret = phy->ops->power_off(phy); |
| 361 | if (ret < 0) { |
| 362 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 363 | mutex_unlock(&phy->mutex); |
| 364 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 365 | } |
| 366 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 367 | --phy->power_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 368 | mutex_unlock(&phy->mutex); |
| 369 | phy_pm_runtime_put(phy); |
| 370 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 371 | if (phy->pwr) |
| 372 | regulator_disable(phy->pwr); |
| 373 | |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 374 | return 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 375 | } |
| 376 | EXPORT_SYMBOL_GPL(phy_power_off); |
| 377 | |
| 378 | /** |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 379 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
| 380 | * @np: device_node for which to get the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 381 | * @index: the index of the phy |
| 382 | * |
| 383 | * Returns the phy associated with the given phandle value, |
| 384 | * after getting a refcount to it or -ENODEV if there is no such phy or |
| 385 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is |
| 386 | * not yet loaded. This function uses of_xlate call back function provided |
| 387 | * while registering the phy_provider to find the phy instance. |
| 388 | */ |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 389 | static struct phy *_of_phy_get(struct device_node *np, int index) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 390 | { |
| 391 | int ret; |
| 392 | struct phy_provider *phy_provider; |
| 393 | struct phy *phy = NULL; |
| 394 | struct of_phandle_args args; |
| 395 | |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 396 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 397 | index, &args); |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 398 | if (ret) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 399 | return ERR_PTR(-ENODEV); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 400 | |
| 401 | mutex_lock(&phy_provider_mutex); |
| 402 | phy_provider = of_phy_provider_lookup(args.np); |
| 403 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { |
| 404 | phy = ERR_PTR(-EPROBE_DEFER); |
| 405 | goto err0; |
| 406 | } |
| 407 | |
| 408 | phy = phy_provider->of_xlate(phy_provider->dev, &args); |
| 409 | module_put(phy_provider->owner); |
| 410 | |
| 411 | err0: |
| 412 | mutex_unlock(&phy_provider_mutex); |
| 413 | of_node_put(args.np); |
| 414 | |
| 415 | return phy; |
| 416 | } |
| 417 | |
| 418 | /** |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 419 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. |
| 420 | * @np: device_node for which to get the phy |
| 421 | * @con_id: name of the phy from device's point of view |
| 422 | * |
| 423 | * Returns the phy driver, after getting a refcount to it; or |
| 424 | * -ENODEV if there is no such phy. The caller is responsible for |
| 425 | * calling phy_put() to release that count. |
| 426 | */ |
| 427 | struct phy *of_phy_get(struct device_node *np, const char *con_id) |
| 428 | { |
| 429 | struct phy *phy = NULL; |
| 430 | int index = 0; |
| 431 | |
| 432 | if (con_id) |
| 433 | index = of_property_match_string(np, "phy-names", con_id); |
| 434 | |
| 435 | phy = _of_phy_get(np, index); |
| 436 | if (IS_ERR(phy)) |
| 437 | return phy; |
| 438 | |
| 439 | if (!try_module_get(phy->ops->owner)) |
| 440 | return ERR_PTR(-EPROBE_DEFER); |
| 441 | |
| 442 | get_device(&phy->dev); |
| 443 | |
| 444 | return phy; |
| 445 | } |
| 446 | EXPORT_SYMBOL_GPL(of_phy_get); |
| 447 | |
| 448 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 449 | * phy_put() - release the PHY |
| 450 | * @phy: the phy returned by phy_get() |
| 451 | * |
| 452 | * Releases a refcount the caller received from phy_get(). |
| 453 | */ |
| 454 | void phy_put(struct phy *phy) |
| 455 | { |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 456 | if (!phy || IS_ERR(phy)) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 457 | return; |
| 458 | |
| 459 | module_put(phy->ops->owner); |
| 460 | put_device(&phy->dev); |
| 461 | } |
| 462 | EXPORT_SYMBOL_GPL(phy_put); |
| 463 | |
| 464 | /** |
| 465 | * devm_phy_put() - release the PHY |
| 466 | * @dev: device that wants to release this phy |
| 467 | * @phy: the phy returned by devm_phy_get() |
| 468 | * |
| 469 | * destroys the devres associated with this phy and invokes phy_put |
| 470 | * to release the phy. |
| 471 | */ |
| 472 | void devm_phy_put(struct device *dev, struct phy *phy) |
| 473 | { |
| 474 | int r; |
| 475 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 476 | if (!phy) |
| 477 | return; |
| 478 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 479 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
| 480 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); |
| 481 | } |
| 482 | EXPORT_SYMBOL_GPL(devm_phy_put); |
| 483 | |
| 484 | /** |
| 485 | * of_phy_simple_xlate() - returns the phy instance from phy provider |
| 486 | * @dev: the PHY provider device |
| 487 | * @args: of_phandle_args (not used here) |
| 488 | * |
| 489 | * Intended to be used by phy provider for the common case where #phy-cells is |
| 490 | * 0. For other cases where #phy-cells is greater than '0', the phy provider |
| 491 | * should provide a custom of_xlate function that reads the *args* and returns |
| 492 | * the appropriate phy. |
| 493 | */ |
| 494 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args |
| 495 | *args) |
| 496 | { |
| 497 | struct phy *phy; |
| 498 | struct class_dev_iter iter; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 499 | |
| 500 | class_dev_iter_init(&iter, phy_class, NULL, NULL); |
| 501 | while ((dev = class_dev_iter_next(&iter))) { |
| 502 | phy = to_phy(dev); |
Kishon Vijay Abraham I | 491e049 | 2014-10-31 14:04:20 +0530 | [diff] [blame] | 503 | if (args->np != phy->dev.of_node) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 504 | continue; |
| 505 | |
| 506 | class_dev_iter_exit(&iter); |
| 507 | return phy; |
| 508 | } |
| 509 | |
| 510 | class_dev_iter_exit(&iter); |
| 511 | return ERR_PTR(-ENODEV); |
| 512 | } |
| 513 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); |
| 514 | |
| 515 | /** |
| 516 | * phy_get() - lookup and obtain a reference to a phy. |
| 517 | * @dev: device that requests this phy |
| 518 | * @string: the phy name as given in the dt data or the name of the controller |
| 519 | * port for non-dt case |
| 520 | * |
| 521 | * Returns the phy driver, after getting a refcount to it; or |
| 522 | * -ENODEV if there is no such phy. The caller is responsible for |
| 523 | * calling phy_put() to release that count. |
| 524 | */ |
| 525 | struct phy *phy_get(struct device *dev, const char *string) |
| 526 | { |
| 527 | int index = 0; |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 528 | struct phy *phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 529 | |
| 530 | if (string == NULL) { |
| 531 | dev_WARN(dev, "missing string\n"); |
| 532 | return ERR_PTR(-EINVAL); |
| 533 | } |
| 534 | |
| 535 | if (dev->of_node) { |
| 536 | index = of_property_match_string(dev->of_node, "phy-names", |
| 537 | string); |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 538 | phy = _of_phy_get(dev->of_node, index); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 539 | } else { |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame^] | 540 | phy = phy_find(dev, string); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 541 | } |
Hans de Goede | f40037f | 2014-02-17 14:29:22 +0530 | [diff] [blame] | 542 | if (IS_ERR(phy)) |
| 543 | return phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 544 | |
| 545 | if (!try_module_get(phy->ops->owner)) |
| 546 | return ERR_PTR(-EPROBE_DEFER); |
| 547 | |
| 548 | get_device(&phy->dev); |
| 549 | |
| 550 | return phy; |
| 551 | } |
| 552 | EXPORT_SYMBOL_GPL(phy_get); |
| 553 | |
| 554 | /** |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 555 | * phy_optional_get() - lookup and obtain a reference to an optional phy. |
| 556 | * @dev: device that requests this phy |
| 557 | * @string: the phy name as given in the dt data or the name of the controller |
| 558 | * port for non-dt case |
| 559 | * |
| 560 | * Returns the phy driver, after getting a refcount to it; or |
| 561 | * NULL if there is no such phy. The caller is responsible for |
| 562 | * calling phy_put() to release that count. |
| 563 | */ |
| 564 | struct phy *phy_optional_get(struct device *dev, const char *string) |
| 565 | { |
| 566 | struct phy *phy = phy_get(dev, string); |
| 567 | |
| 568 | if (PTR_ERR(phy) == -ENODEV) |
| 569 | phy = NULL; |
| 570 | |
| 571 | return phy; |
| 572 | } |
| 573 | EXPORT_SYMBOL_GPL(phy_optional_get); |
| 574 | |
| 575 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 576 | * devm_phy_get() - lookup and obtain a reference to a phy. |
| 577 | * @dev: device that requests this phy |
| 578 | * @string: the phy name as given in the dt data or phy device name |
| 579 | * for non-dt case |
| 580 | * |
| 581 | * Gets the phy using phy_get(), and associates a device with it using |
| 582 | * devres. On driver detach, release function is invoked on the devres data, |
| 583 | * then, devres data is freed. |
| 584 | */ |
| 585 | struct phy *devm_phy_get(struct device *dev, const char *string) |
| 586 | { |
| 587 | struct phy **ptr, *phy; |
| 588 | |
| 589 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 590 | if (!ptr) |
| 591 | return ERR_PTR(-ENOMEM); |
| 592 | |
| 593 | phy = phy_get(dev, string); |
| 594 | if (!IS_ERR(phy)) { |
| 595 | *ptr = phy; |
| 596 | devres_add(dev, ptr); |
| 597 | } else { |
| 598 | devres_free(ptr); |
| 599 | } |
| 600 | |
| 601 | return phy; |
| 602 | } |
| 603 | EXPORT_SYMBOL_GPL(devm_phy_get); |
| 604 | |
| 605 | /** |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 606 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. |
| 607 | * @dev: device that requests this phy |
| 608 | * @string: the phy name as given in the dt data or phy device name |
| 609 | * for non-dt case |
| 610 | * |
| 611 | * Gets the phy using phy_get(), and associates a device with it using |
| 612 | * devres. On driver detach, release function is invoked on the devres |
| 613 | * data, then, devres data is freed. This differs to devm_phy_get() in |
| 614 | * that if the phy does not exist, it is not considered an error and |
| 615 | * -ENODEV will not be returned. Instead the NULL phy is returned, |
| 616 | * which can be passed to all other phy consumer calls. |
| 617 | */ |
| 618 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) |
| 619 | { |
| 620 | struct phy *phy = devm_phy_get(dev, string); |
| 621 | |
| 622 | if (PTR_ERR(phy) == -ENODEV) |
| 623 | phy = NULL; |
| 624 | |
| 625 | return phy; |
| 626 | } |
| 627 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); |
| 628 | |
| 629 | /** |
Kamil Debski | b5d682f | 2014-03-06 12:16:47 +0100 | [diff] [blame] | 630 | * devm_of_phy_get() - lookup and obtain a reference to a phy. |
| 631 | * @dev: device that requests this phy |
| 632 | * @np: node containing the phy |
| 633 | * @con_id: name of the phy from device's point of view |
| 634 | * |
| 635 | * Gets the phy using of_phy_get(), and associates a device with it using |
| 636 | * devres. On driver detach, release function is invoked on the devres data, |
| 637 | * then, devres data is freed. |
| 638 | */ |
| 639 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, |
| 640 | const char *con_id) |
| 641 | { |
| 642 | struct phy **ptr, *phy; |
| 643 | |
| 644 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 645 | if (!ptr) |
| 646 | return ERR_PTR(-ENOMEM); |
| 647 | |
| 648 | phy = of_phy_get(np, con_id); |
| 649 | if (!IS_ERR(phy)) { |
| 650 | *ptr = phy; |
| 651 | devres_add(dev, ptr); |
| 652 | } else { |
| 653 | devres_free(ptr); |
| 654 | } |
| 655 | |
| 656 | return phy; |
| 657 | } |
| 658 | EXPORT_SYMBOL_GPL(devm_of_phy_get); |
| 659 | |
| 660 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 661 | * phy_create() - create a new phy |
| 662 | * @dev: device that is creating the new phy |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 663 | * @node: device node of the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 664 | * @ops: function pointers for performing phy operations |
| 665 | * @init_data: contains the list of PHY consumers or NULL |
| 666 | * |
| 667 | * Called to create a phy using phy framework. |
| 668 | */ |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 669 | struct phy *phy_create(struct device *dev, struct device_node *node, |
| 670 | const struct phy_ops *ops, |
| 671 | struct phy_init_data *init_data) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 672 | { |
| 673 | int ret; |
| 674 | int id; |
| 675 | struct phy *phy; |
| 676 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 677 | if (WARN_ON(!dev)) |
| 678 | return ERR_PTR(-EINVAL); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 679 | |
| 680 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 681 | if (!phy) |
| 682 | return ERR_PTR(-ENOMEM); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 683 | |
| 684 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); |
| 685 | if (id < 0) { |
| 686 | dev_err(dev, "unable to get id\n"); |
| 687 | ret = id; |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 688 | goto free_phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 689 | } |
| 690 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 691 | /* phy-supply */ |
| 692 | phy->pwr = regulator_get_optional(dev, "phy"); |
| 693 | if (IS_ERR(phy->pwr)) { |
| 694 | if (PTR_ERR(phy->pwr) == -EPROBE_DEFER) { |
| 695 | ret = -EPROBE_DEFER; |
| 696 | goto free_ida; |
| 697 | } |
| 698 | phy->pwr = NULL; |
| 699 | } |
| 700 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 701 | device_initialize(&phy->dev); |
| 702 | mutex_init(&phy->mutex); |
| 703 | |
| 704 | phy->dev.class = phy_class; |
| 705 | phy->dev.parent = dev; |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 706 | phy->dev.of_node = node ?: dev->of_node; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 707 | phy->id = id; |
| 708 | phy->ops = ops; |
| 709 | phy->init_data = init_data; |
| 710 | |
| 711 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); |
| 712 | if (ret) |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 713 | goto put_dev; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 714 | |
| 715 | ret = device_add(&phy->dev); |
| 716 | if (ret) |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 717 | goto put_dev; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 718 | |
| 719 | if (pm_runtime_enabled(dev)) { |
| 720 | pm_runtime_enable(&phy->dev); |
| 721 | pm_runtime_no_callbacks(&phy->dev); |
| 722 | } |
| 723 | |
| 724 | return phy; |
| 725 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 726 | put_dev: |
Roger Quadros | e73b49f | 2014-07-10 11:55:02 +0530 | [diff] [blame] | 727 | put_device(&phy->dev); /* calls phy_release() which frees resources */ |
| 728 | return ERR_PTR(ret); |
| 729 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 730 | free_ida: |
| 731 | ida_simple_remove(&phy_ida, phy->id); |
| 732 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 733 | free_phy: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 734 | kfree(phy); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 735 | return ERR_PTR(ret); |
| 736 | } |
| 737 | EXPORT_SYMBOL_GPL(phy_create); |
| 738 | |
| 739 | /** |
| 740 | * devm_phy_create() - create a new phy |
| 741 | * @dev: device that is creating the new phy |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 742 | * @node: device node of the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 743 | * @ops: function pointers for performing phy operations |
| 744 | * @init_data: contains the list of PHY consumers or NULL |
| 745 | * |
| 746 | * Creates a new PHY device adding it to the PHY class. |
| 747 | * While at that, it also associates the device with the phy using devres. |
| 748 | * On driver detach, release function is invoked on the devres data, |
| 749 | * then, devres data is freed. |
| 750 | */ |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 751 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
| 752 | const struct phy_ops *ops, |
| 753 | struct phy_init_data *init_data) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 754 | { |
| 755 | struct phy **ptr, *phy; |
| 756 | |
| 757 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); |
| 758 | if (!ptr) |
| 759 | return ERR_PTR(-ENOMEM); |
| 760 | |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 761 | phy = phy_create(dev, node, ops, init_data); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 762 | if (!IS_ERR(phy)) { |
| 763 | *ptr = phy; |
| 764 | devres_add(dev, ptr); |
| 765 | } else { |
| 766 | devres_free(ptr); |
| 767 | } |
| 768 | |
| 769 | return phy; |
| 770 | } |
| 771 | EXPORT_SYMBOL_GPL(devm_phy_create); |
| 772 | |
| 773 | /** |
| 774 | * phy_destroy() - destroy the phy |
| 775 | * @phy: the phy to be destroyed |
| 776 | * |
| 777 | * Called to destroy the phy. |
| 778 | */ |
| 779 | void phy_destroy(struct phy *phy) |
| 780 | { |
| 781 | pm_runtime_disable(&phy->dev); |
| 782 | device_unregister(&phy->dev); |
| 783 | } |
| 784 | EXPORT_SYMBOL_GPL(phy_destroy); |
| 785 | |
| 786 | /** |
| 787 | * devm_phy_destroy() - destroy the PHY |
| 788 | * @dev: device that wants to release this phy |
| 789 | * @phy: the phy returned by devm_phy_get() |
| 790 | * |
| 791 | * destroys the devres associated with this phy and invokes phy_destroy |
| 792 | * to destroy the phy. |
| 793 | */ |
| 794 | void devm_phy_destroy(struct device *dev, struct phy *phy) |
| 795 | { |
| 796 | int r; |
| 797 | |
| 798 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); |
| 799 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); |
| 800 | } |
| 801 | EXPORT_SYMBOL_GPL(devm_phy_destroy); |
| 802 | |
| 803 | /** |
| 804 | * __of_phy_provider_register() - create/register phy provider with the framework |
| 805 | * @dev: struct device of the phy provider |
| 806 | * @owner: the module owner containing of_xlate |
| 807 | * @of_xlate: function pointer to obtain phy instance from phy provider |
| 808 | * |
| 809 | * Creates struct phy_provider from dev and of_xlate function pointer. |
| 810 | * This is used in the case of dt boot for finding the phy instance from |
| 811 | * phy provider. |
| 812 | */ |
| 813 | struct phy_provider *__of_phy_provider_register(struct device *dev, |
| 814 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, |
| 815 | struct of_phandle_args *args)) |
| 816 | { |
| 817 | struct phy_provider *phy_provider; |
| 818 | |
| 819 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); |
| 820 | if (!phy_provider) |
| 821 | return ERR_PTR(-ENOMEM); |
| 822 | |
| 823 | phy_provider->dev = dev; |
| 824 | phy_provider->owner = owner; |
| 825 | phy_provider->of_xlate = of_xlate; |
| 826 | |
| 827 | mutex_lock(&phy_provider_mutex); |
| 828 | list_add_tail(&phy_provider->list, &phy_provider_list); |
| 829 | mutex_unlock(&phy_provider_mutex); |
| 830 | |
| 831 | return phy_provider; |
| 832 | } |
| 833 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); |
| 834 | |
| 835 | /** |
| 836 | * __devm_of_phy_provider_register() - create/register phy provider with the |
| 837 | * framework |
| 838 | * @dev: struct device of the phy provider |
| 839 | * @owner: the module owner containing of_xlate |
| 840 | * @of_xlate: function pointer to obtain phy instance from phy provider |
| 841 | * |
| 842 | * Creates struct phy_provider from dev and of_xlate function pointer. |
| 843 | * This is used in the case of dt boot for finding the phy instance from |
| 844 | * phy provider. While at that, it also associates the device with the |
| 845 | * phy provider using devres. On driver detach, release function is invoked |
| 846 | * on the devres data, then, devres data is freed. |
| 847 | */ |
| 848 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, |
| 849 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, |
| 850 | struct of_phandle_args *args)) |
| 851 | { |
| 852 | struct phy_provider **ptr, *phy_provider; |
| 853 | |
| 854 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); |
| 855 | if (!ptr) |
| 856 | return ERR_PTR(-ENOMEM); |
| 857 | |
| 858 | phy_provider = __of_phy_provider_register(dev, owner, of_xlate); |
| 859 | if (!IS_ERR(phy_provider)) { |
| 860 | *ptr = phy_provider; |
| 861 | devres_add(dev, ptr); |
| 862 | } else { |
| 863 | devres_free(ptr); |
| 864 | } |
| 865 | |
| 866 | return phy_provider; |
| 867 | } |
| 868 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); |
| 869 | |
| 870 | /** |
| 871 | * of_phy_provider_unregister() - unregister phy provider from the framework |
| 872 | * @phy_provider: phy provider returned by of_phy_provider_register() |
| 873 | * |
| 874 | * Removes the phy_provider created using of_phy_provider_register(). |
| 875 | */ |
| 876 | void of_phy_provider_unregister(struct phy_provider *phy_provider) |
| 877 | { |
| 878 | if (IS_ERR(phy_provider)) |
| 879 | return; |
| 880 | |
| 881 | mutex_lock(&phy_provider_mutex); |
| 882 | list_del(&phy_provider->list); |
| 883 | kfree(phy_provider); |
| 884 | mutex_unlock(&phy_provider_mutex); |
| 885 | } |
| 886 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); |
| 887 | |
| 888 | /** |
| 889 | * devm_of_phy_provider_unregister() - remove phy provider from the framework |
| 890 | * @dev: struct device of the phy provider |
| 891 | * |
| 892 | * destroys the devres associated with this phy provider and invokes |
| 893 | * of_phy_provider_unregister to unregister the phy provider. |
| 894 | */ |
| 895 | void devm_of_phy_provider_unregister(struct device *dev, |
| 896 | struct phy_provider *phy_provider) { |
| 897 | int r; |
| 898 | |
| 899 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, |
| 900 | phy_provider); |
| 901 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); |
| 902 | } |
| 903 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); |
| 904 | |
| 905 | /** |
| 906 | * phy_release() - release the phy |
| 907 | * @dev: the dev member within phy |
| 908 | * |
| 909 | * When the last reference to the device is removed, it is called |
| 910 | * from the embedded kobject as release method. |
| 911 | */ |
| 912 | static void phy_release(struct device *dev) |
| 913 | { |
| 914 | struct phy *phy; |
| 915 | |
| 916 | phy = to_phy(dev); |
| 917 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 918 | regulator_put(phy->pwr); |
Roger Quadros | e73b49f | 2014-07-10 11:55:02 +0530 | [diff] [blame] | 919 | ida_simple_remove(&phy_ida, phy->id); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 920 | kfree(phy); |
| 921 | } |
| 922 | |
| 923 | static int __init phy_core_init(void) |
| 924 | { |
| 925 | phy_class = class_create(THIS_MODULE, "phy"); |
| 926 | if (IS_ERR(phy_class)) { |
| 927 | pr_err("failed to create phy class --> %ld\n", |
| 928 | PTR_ERR(phy_class)); |
| 929 | return PTR_ERR(phy_class); |
| 930 | } |
| 931 | |
| 932 | phy_class->dev_release = phy_release; |
| 933 | |
| 934 | return 0; |
| 935 | } |
| 936 | module_init(phy_core_init); |
| 937 | |
| 938 | static void __exit phy_core_exit(void) |
| 939 | { |
| 940 | class_destroy(phy_class); |
| 941 | } |
| 942 | module_exit(phy_core_exit); |
| 943 | |
| 944 | MODULE_DESCRIPTION("Generic PHY Framework"); |
| 945 | MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); |
| 946 | MODULE_LICENSE("GPL v2"); |