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 | { |
Thierry Reding | 2f1bce4 | 2015-02-25 16:16:29 +0100 | [diff] [blame] | 55 | struct phy **phy = res; |
| 56 | |
| 57 | return *phy == match_data; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 58 | } |
| 59 | |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame] | 60 | /** |
| 61 | * phy_create_lookup() - allocate and register PHY/device association |
| 62 | * @phy: the phy of the association |
| 63 | * @con_id: connection ID string on device |
| 64 | * @dev_id: the device of the association |
| 65 | * |
| 66 | * Creates and registers phy_lookup entry. |
| 67 | */ |
| 68 | int phy_create_lookup(struct phy *phy, const char *con_id, const char *dev_id) |
| 69 | { |
| 70 | struct phy_lookup *pl; |
| 71 | |
| 72 | if (!phy || !dev_id || !con_id) |
| 73 | return -EINVAL; |
| 74 | |
| 75 | pl = kzalloc(sizeof(*pl), GFP_KERNEL); |
| 76 | if (!pl) |
| 77 | return -ENOMEM; |
| 78 | |
| 79 | pl->dev_id = dev_id; |
| 80 | pl->con_id = con_id; |
| 81 | pl->phy = phy; |
| 82 | |
| 83 | mutex_lock(&phy_provider_mutex); |
| 84 | list_add_tail(&pl->node, &phys); |
| 85 | mutex_unlock(&phy_provider_mutex); |
| 86 | |
| 87 | return 0; |
| 88 | } |
| 89 | EXPORT_SYMBOL_GPL(phy_create_lookup); |
| 90 | |
| 91 | /** |
| 92 | * phy_remove_lookup() - find and remove PHY/device association |
| 93 | * @phy: the phy of the association |
| 94 | * @con_id: connection ID string on device |
| 95 | * @dev_id: the device of the association |
| 96 | * |
| 97 | * Finds and unregisters phy_lookup entry that was created with |
| 98 | * phy_create_lookup(). |
| 99 | */ |
| 100 | void phy_remove_lookup(struct phy *phy, const char *con_id, const char *dev_id) |
| 101 | { |
| 102 | struct phy_lookup *pl; |
| 103 | |
| 104 | if (!phy || !dev_id || !con_id) |
| 105 | return; |
| 106 | |
| 107 | mutex_lock(&phy_provider_mutex); |
| 108 | list_for_each_entry(pl, &phys, node) |
| 109 | if (pl->phy == phy && !strcmp(pl->dev_id, dev_id) && |
| 110 | !strcmp(pl->con_id, con_id)) { |
| 111 | list_del(&pl->node); |
| 112 | kfree(pl); |
| 113 | break; |
| 114 | } |
| 115 | mutex_unlock(&phy_provider_mutex); |
| 116 | } |
| 117 | EXPORT_SYMBOL_GPL(phy_remove_lookup); |
| 118 | |
| 119 | static struct phy *phy_find(struct device *dev, const char *con_id) |
| 120 | { |
| 121 | const char *dev_id = dev_name(dev); |
| 122 | struct phy_lookup *p, *pl = NULL; |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame] | 123 | |
| 124 | mutex_lock(&phy_provider_mutex); |
| 125 | list_for_each_entry(p, &phys, node) |
| 126 | if (!strcmp(p->dev_id, dev_id) && !strcmp(p->con_id, con_id)) { |
| 127 | pl = p; |
| 128 | break; |
| 129 | } |
| 130 | mutex_unlock(&phy_provider_mutex); |
| 131 | |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 132 | return pl ? pl->phy : ERR_PTR(-ENODEV); |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame] | 133 | } |
| 134 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 135 | static struct phy_provider *of_phy_provider_lookup(struct device_node *node) |
| 136 | { |
| 137 | struct phy_provider *phy_provider; |
Kishon Vijay Abraham I | 2a4c370 | 2014-07-14 15:55:01 +0530 | [diff] [blame] | 138 | struct device_node *child; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 139 | |
| 140 | list_for_each_entry(phy_provider, &phy_provider_list, list) { |
| 141 | if (phy_provider->dev->of_node == node) |
| 142 | return phy_provider; |
Kishon Vijay Abraham I | 2a4c370 | 2014-07-14 15:55:01 +0530 | [diff] [blame] | 143 | |
| 144 | for_each_child_of_node(phy_provider->dev->of_node, child) |
| 145 | if (child == node) |
| 146 | return phy_provider; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 147 | } |
| 148 | |
| 149 | return ERR_PTR(-EPROBE_DEFER); |
| 150 | } |
| 151 | |
| 152 | int phy_pm_runtime_get(struct phy *phy) |
| 153 | { |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 154 | int ret; |
| 155 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 156 | if (!pm_runtime_enabled(&phy->dev)) |
| 157 | return -ENOTSUPP; |
| 158 | |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 159 | ret = pm_runtime_get(&phy->dev); |
| 160 | if (ret < 0 && ret != -EINPROGRESS) |
| 161 | pm_runtime_put_noidle(&phy->dev); |
| 162 | |
| 163 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 164 | } |
| 165 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); |
| 166 | |
| 167 | int phy_pm_runtime_get_sync(struct phy *phy) |
| 168 | { |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 169 | int ret; |
| 170 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 171 | if (!pm_runtime_enabled(&phy->dev)) |
| 172 | return -ENOTSUPP; |
| 173 | |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 174 | ret = pm_runtime_get_sync(&phy->dev); |
| 175 | if (ret < 0) |
| 176 | pm_runtime_put_sync(&phy->dev); |
| 177 | |
| 178 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 179 | } |
| 180 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); |
| 181 | |
| 182 | int phy_pm_runtime_put(struct phy *phy) |
| 183 | { |
| 184 | if (!pm_runtime_enabled(&phy->dev)) |
| 185 | return -ENOTSUPP; |
| 186 | |
| 187 | return pm_runtime_put(&phy->dev); |
| 188 | } |
| 189 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); |
| 190 | |
| 191 | int phy_pm_runtime_put_sync(struct phy *phy) |
| 192 | { |
| 193 | if (!pm_runtime_enabled(&phy->dev)) |
| 194 | return -ENOTSUPP; |
| 195 | |
| 196 | return pm_runtime_put_sync(&phy->dev); |
| 197 | } |
| 198 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); |
| 199 | |
| 200 | void phy_pm_runtime_allow(struct phy *phy) |
| 201 | { |
| 202 | if (!pm_runtime_enabled(&phy->dev)) |
| 203 | return; |
| 204 | |
| 205 | pm_runtime_allow(&phy->dev); |
| 206 | } |
| 207 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); |
| 208 | |
| 209 | void phy_pm_runtime_forbid(struct phy *phy) |
| 210 | { |
| 211 | if (!pm_runtime_enabled(&phy->dev)) |
| 212 | return; |
| 213 | |
| 214 | pm_runtime_forbid(&phy->dev); |
| 215 | } |
| 216 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); |
| 217 | |
| 218 | int phy_init(struct phy *phy) |
| 219 | { |
| 220 | int ret; |
| 221 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 222 | if (!phy) |
| 223 | return 0; |
| 224 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 225 | ret = phy_pm_runtime_get_sync(phy); |
| 226 | if (ret < 0 && ret != -ENOTSUPP) |
| 227 | return ret; |
Axel Lin | 736b67a | 2015-03-06 15:55:10 +0800 | [diff] [blame] | 228 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 229 | |
| 230 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 231 | if (phy->init_count == 0 && phy->ops->init) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 232 | ret = phy->ops->init(phy); |
| 233 | if (ret < 0) { |
| 234 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); |
| 235 | goto out; |
| 236 | } |
| 237 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 238 | ++phy->init_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 239 | |
| 240 | out: |
| 241 | mutex_unlock(&phy->mutex); |
| 242 | phy_pm_runtime_put(phy); |
| 243 | return ret; |
| 244 | } |
| 245 | EXPORT_SYMBOL_GPL(phy_init); |
| 246 | |
| 247 | int phy_exit(struct phy *phy) |
| 248 | { |
| 249 | int ret; |
| 250 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 251 | if (!phy) |
| 252 | return 0; |
| 253 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 254 | ret = phy_pm_runtime_get_sync(phy); |
| 255 | if (ret < 0 && ret != -ENOTSUPP) |
| 256 | return ret; |
Axel Lin | 736b67a | 2015-03-06 15:55:10 +0800 | [diff] [blame] | 257 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 258 | |
| 259 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 260 | if (phy->init_count == 1 && phy->ops->exit) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 261 | ret = phy->ops->exit(phy); |
| 262 | if (ret < 0) { |
| 263 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); |
| 264 | goto out; |
| 265 | } |
| 266 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 267 | --phy->init_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 268 | |
| 269 | out: |
| 270 | mutex_unlock(&phy->mutex); |
| 271 | phy_pm_runtime_put(phy); |
| 272 | return ret; |
| 273 | } |
| 274 | EXPORT_SYMBOL_GPL(phy_exit); |
| 275 | |
| 276 | int phy_power_on(struct phy *phy) |
| 277 | { |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 278 | int ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 279 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 280 | if (!phy) |
| 281 | return 0; |
| 282 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 283 | if (phy->pwr) { |
| 284 | ret = regulator_enable(phy->pwr); |
| 285 | if (ret) |
| 286 | return ret; |
| 287 | } |
| 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; |
Axel Lin | 736b67a | 2015-03-06 15:55:10 +0800 | [diff] [blame] | 292 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 293 | |
| 294 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 295 | if (phy->power_count == 0 && phy->ops->power_on) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 296 | ret = phy->ops->power_on(phy); |
| 297 | if (ret < 0) { |
| 298 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); |
| 299 | goto out; |
| 300 | } |
| 301 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 302 | ++phy->power_count; |
| 303 | mutex_unlock(&phy->mutex); |
| 304 | return 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 305 | |
| 306 | out: |
| 307 | mutex_unlock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 308 | phy_pm_runtime_put_sync(phy); |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 309 | if (phy->pwr) |
| 310 | regulator_disable(phy->pwr); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 311 | |
| 312 | return ret; |
| 313 | } |
| 314 | EXPORT_SYMBOL_GPL(phy_power_on); |
| 315 | |
| 316 | int phy_power_off(struct phy *phy) |
| 317 | { |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 318 | int ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 319 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 320 | if (!phy) |
| 321 | return 0; |
| 322 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 323 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 324 | if (phy->power_count == 1 && phy->ops->power_off) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 325 | ret = phy->ops->power_off(phy); |
| 326 | if (ret < 0) { |
| 327 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 328 | mutex_unlock(&phy->mutex); |
| 329 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 330 | } |
| 331 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 332 | --phy->power_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 333 | mutex_unlock(&phy->mutex); |
| 334 | phy_pm_runtime_put(phy); |
| 335 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 336 | if (phy->pwr) |
| 337 | regulator_disable(phy->pwr); |
| 338 | |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 339 | return 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 340 | } |
| 341 | EXPORT_SYMBOL_GPL(phy_power_off); |
| 342 | |
| 343 | /** |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 344 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
| 345 | * @np: device_node for which to get the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 346 | * @index: the index of the phy |
| 347 | * |
| 348 | * Returns the phy associated with the given phandle value, |
| 349 | * after getting a refcount to it or -ENODEV if there is no such phy or |
| 350 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is |
| 351 | * not yet loaded. This function uses of_xlate call back function provided |
| 352 | * while registering the phy_provider to find the phy instance. |
| 353 | */ |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 354 | 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] | 355 | { |
| 356 | int ret; |
| 357 | struct phy_provider *phy_provider; |
| 358 | struct phy *phy = NULL; |
| 359 | struct of_phandle_args args; |
| 360 | |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 361 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 362 | index, &args); |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 363 | if (ret) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 364 | return ERR_PTR(-ENODEV); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 365 | |
| 366 | mutex_lock(&phy_provider_mutex); |
| 367 | phy_provider = of_phy_provider_lookup(args.np); |
| 368 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { |
| 369 | phy = ERR_PTR(-EPROBE_DEFER); |
Axel Lin | 33f434d | 2015-04-07 12:23:38 +0800 | [diff] [blame^] | 370 | goto out_unlock; |
| 371 | } |
| 372 | |
| 373 | if (!of_device_is_available(args.np)) { |
| 374 | dev_warn(phy_provider->dev, "Requested PHY is disabled\n"); |
| 375 | phy = ERR_PTR(-ENODEV); |
| 376 | goto out_put_module; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 377 | } |
| 378 | |
| 379 | phy = phy_provider->of_xlate(phy_provider->dev, &args); |
Axel Lin | 33f434d | 2015-04-07 12:23:38 +0800 | [diff] [blame^] | 380 | |
| 381 | out_put_module: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 382 | module_put(phy_provider->owner); |
| 383 | |
Axel Lin | 33f434d | 2015-04-07 12:23:38 +0800 | [diff] [blame^] | 384 | out_unlock: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 385 | mutex_unlock(&phy_provider_mutex); |
| 386 | of_node_put(args.np); |
| 387 | |
| 388 | return phy; |
| 389 | } |
| 390 | |
| 391 | /** |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 392 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. |
| 393 | * @np: device_node for which to get the phy |
| 394 | * @con_id: name of the phy from device's point of view |
| 395 | * |
| 396 | * Returns the phy driver, after getting a refcount to it; or |
| 397 | * -ENODEV if there is no such phy. The caller is responsible for |
| 398 | * calling phy_put() to release that count. |
| 399 | */ |
| 400 | struct phy *of_phy_get(struct device_node *np, const char *con_id) |
| 401 | { |
| 402 | struct phy *phy = NULL; |
| 403 | int index = 0; |
| 404 | |
| 405 | if (con_id) |
| 406 | index = of_property_match_string(np, "phy-names", con_id); |
| 407 | |
| 408 | phy = _of_phy_get(np, index); |
| 409 | if (IS_ERR(phy)) |
| 410 | return phy; |
| 411 | |
| 412 | if (!try_module_get(phy->ops->owner)) |
| 413 | return ERR_PTR(-EPROBE_DEFER); |
| 414 | |
| 415 | get_device(&phy->dev); |
| 416 | |
| 417 | return phy; |
| 418 | } |
| 419 | EXPORT_SYMBOL_GPL(of_phy_get); |
| 420 | |
| 421 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 422 | * phy_put() - release the PHY |
| 423 | * @phy: the phy returned by phy_get() |
| 424 | * |
| 425 | * Releases a refcount the caller received from phy_get(). |
| 426 | */ |
| 427 | void phy_put(struct phy *phy) |
| 428 | { |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 429 | if (!phy || IS_ERR(phy)) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 430 | return; |
| 431 | |
| 432 | module_put(phy->ops->owner); |
| 433 | put_device(&phy->dev); |
| 434 | } |
| 435 | EXPORT_SYMBOL_GPL(phy_put); |
| 436 | |
| 437 | /** |
| 438 | * devm_phy_put() - release the PHY |
| 439 | * @dev: device that wants to release this phy |
| 440 | * @phy: the phy returned by devm_phy_get() |
| 441 | * |
| 442 | * destroys the devres associated with this phy and invokes phy_put |
| 443 | * to release the phy. |
| 444 | */ |
| 445 | void devm_phy_put(struct device *dev, struct phy *phy) |
| 446 | { |
| 447 | int r; |
| 448 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 449 | if (!phy) |
| 450 | return; |
| 451 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 452 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
| 453 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); |
| 454 | } |
| 455 | EXPORT_SYMBOL_GPL(devm_phy_put); |
| 456 | |
| 457 | /** |
| 458 | * of_phy_simple_xlate() - returns the phy instance from phy provider |
| 459 | * @dev: the PHY provider device |
| 460 | * @args: of_phandle_args (not used here) |
| 461 | * |
| 462 | * Intended to be used by phy provider for the common case where #phy-cells is |
| 463 | * 0. For other cases where #phy-cells is greater than '0', the phy provider |
| 464 | * should provide a custom of_xlate function that reads the *args* and returns |
| 465 | * the appropriate phy. |
| 466 | */ |
| 467 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args |
| 468 | *args) |
| 469 | { |
| 470 | struct phy *phy; |
| 471 | struct class_dev_iter iter; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 472 | |
| 473 | class_dev_iter_init(&iter, phy_class, NULL, NULL); |
| 474 | while ((dev = class_dev_iter_next(&iter))) { |
| 475 | phy = to_phy(dev); |
Kishon Vijay Abraham I | 491e049 | 2014-10-31 14:04:20 +0530 | [diff] [blame] | 476 | if (args->np != phy->dev.of_node) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 477 | continue; |
| 478 | |
| 479 | class_dev_iter_exit(&iter); |
| 480 | return phy; |
| 481 | } |
| 482 | |
| 483 | class_dev_iter_exit(&iter); |
| 484 | return ERR_PTR(-ENODEV); |
| 485 | } |
| 486 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); |
| 487 | |
| 488 | /** |
| 489 | * phy_get() - lookup and obtain a reference to a phy. |
| 490 | * @dev: device that requests this phy |
| 491 | * @string: the phy name as given in the dt data or the name of the controller |
| 492 | * port for non-dt case |
| 493 | * |
| 494 | * Returns the phy driver, after getting a refcount to it; or |
| 495 | * -ENODEV if there is no such phy. The caller is responsible for |
| 496 | * calling phy_put() to release that count. |
| 497 | */ |
| 498 | struct phy *phy_get(struct device *dev, const char *string) |
| 499 | { |
| 500 | int index = 0; |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 501 | struct phy *phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 502 | |
| 503 | if (string == NULL) { |
| 504 | dev_WARN(dev, "missing string\n"); |
| 505 | return ERR_PTR(-EINVAL); |
| 506 | } |
| 507 | |
| 508 | if (dev->of_node) { |
| 509 | index = of_property_match_string(dev->of_node, "phy-names", |
| 510 | string); |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 511 | phy = _of_phy_get(dev->of_node, index); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 512 | } else { |
Heikki Krogerus | b7bc15b9 | 2014-11-19 17:28:18 +0200 | [diff] [blame] | 513 | phy = phy_find(dev, string); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 514 | } |
Hans de Goede | f40037f | 2014-02-17 14:29:22 +0530 | [diff] [blame] | 515 | if (IS_ERR(phy)) |
| 516 | return phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 517 | |
| 518 | if (!try_module_get(phy->ops->owner)) |
| 519 | return ERR_PTR(-EPROBE_DEFER); |
| 520 | |
| 521 | get_device(&phy->dev); |
| 522 | |
| 523 | return phy; |
| 524 | } |
| 525 | EXPORT_SYMBOL_GPL(phy_get); |
| 526 | |
| 527 | /** |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 528 | * phy_optional_get() - lookup and obtain a reference to an optional phy. |
| 529 | * @dev: device that requests this phy |
| 530 | * @string: the phy name as given in the dt data or the name of the controller |
| 531 | * port for non-dt case |
| 532 | * |
| 533 | * Returns the phy driver, after getting a refcount to it; or |
| 534 | * NULL if there is no such phy. The caller is responsible for |
| 535 | * calling phy_put() to release that count. |
| 536 | */ |
| 537 | struct phy *phy_optional_get(struct device *dev, const char *string) |
| 538 | { |
| 539 | struct phy *phy = phy_get(dev, string); |
| 540 | |
| 541 | if (PTR_ERR(phy) == -ENODEV) |
| 542 | phy = NULL; |
| 543 | |
| 544 | return phy; |
| 545 | } |
| 546 | EXPORT_SYMBOL_GPL(phy_optional_get); |
| 547 | |
| 548 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 549 | * devm_phy_get() - lookup and obtain a reference to a phy. |
| 550 | * @dev: device that requests this phy |
| 551 | * @string: the phy name as given in the dt data or phy device name |
| 552 | * for non-dt case |
| 553 | * |
| 554 | * Gets the phy using phy_get(), and associates a device with it using |
| 555 | * devres. On driver detach, release function is invoked on the devres data, |
| 556 | * then, devres data is freed. |
| 557 | */ |
| 558 | struct phy *devm_phy_get(struct device *dev, const char *string) |
| 559 | { |
| 560 | struct phy **ptr, *phy; |
| 561 | |
| 562 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 563 | if (!ptr) |
| 564 | return ERR_PTR(-ENOMEM); |
| 565 | |
| 566 | phy = phy_get(dev, string); |
| 567 | if (!IS_ERR(phy)) { |
| 568 | *ptr = phy; |
| 569 | devres_add(dev, ptr); |
| 570 | } else { |
| 571 | devres_free(ptr); |
| 572 | } |
| 573 | |
| 574 | return phy; |
| 575 | } |
| 576 | EXPORT_SYMBOL_GPL(devm_phy_get); |
| 577 | |
| 578 | /** |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 579 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. |
| 580 | * @dev: device that requests this phy |
| 581 | * @string: the phy name as given in the dt data or phy device name |
| 582 | * for non-dt case |
| 583 | * |
| 584 | * Gets the phy using phy_get(), and associates a device with it using |
| 585 | * devres. On driver detach, release function is invoked on the devres |
| 586 | * data, then, devres data is freed. This differs to devm_phy_get() in |
| 587 | * that if the phy does not exist, it is not considered an error and |
| 588 | * -ENODEV will not be returned. Instead the NULL phy is returned, |
| 589 | * which can be passed to all other phy consumer calls. |
| 590 | */ |
| 591 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) |
| 592 | { |
| 593 | struct phy *phy = devm_phy_get(dev, string); |
| 594 | |
| 595 | if (PTR_ERR(phy) == -ENODEV) |
| 596 | phy = NULL; |
| 597 | |
| 598 | return phy; |
| 599 | } |
| 600 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); |
| 601 | |
| 602 | /** |
Kamil Debski | b5d682f | 2014-03-06 12:16:47 +0100 | [diff] [blame] | 603 | * devm_of_phy_get() - lookup and obtain a reference to a phy. |
| 604 | * @dev: device that requests this phy |
| 605 | * @np: node containing the phy |
| 606 | * @con_id: name of the phy from device's point of view |
| 607 | * |
| 608 | * Gets the phy using of_phy_get(), and associates a device with it using |
| 609 | * devres. On driver detach, release function is invoked on the devres data, |
| 610 | * then, devres data is freed. |
| 611 | */ |
| 612 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, |
| 613 | const char *con_id) |
| 614 | { |
| 615 | struct phy **ptr, *phy; |
| 616 | |
| 617 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 618 | if (!ptr) |
| 619 | return ERR_PTR(-ENOMEM); |
| 620 | |
| 621 | phy = of_phy_get(np, con_id); |
| 622 | if (!IS_ERR(phy)) { |
| 623 | *ptr = phy; |
| 624 | devres_add(dev, ptr); |
| 625 | } else { |
| 626 | devres_free(ptr); |
| 627 | } |
| 628 | |
| 629 | return phy; |
| 630 | } |
| 631 | EXPORT_SYMBOL_GPL(devm_of_phy_get); |
| 632 | |
| 633 | /** |
Arun Ramamurthy | 6be109b | 2015-04-22 16:04:11 -0700 | [diff] [blame] | 634 | * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. |
| 635 | * @dev: device that requests this phy |
| 636 | * @np: node containing the phy |
| 637 | * @index: index of the phy |
| 638 | * |
| 639 | * Gets the phy using _of_phy_get(), and associates a device with it using |
| 640 | * devres. On driver detach, release function is invoked on the devres data, |
| 641 | * then, devres data is freed. |
| 642 | * |
| 643 | */ |
| 644 | struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, |
| 645 | int index) |
| 646 | { |
| 647 | struct phy **ptr, *phy; |
| 648 | |
| 649 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 650 | if (!ptr) |
| 651 | return ERR_PTR(-ENOMEM); |
| 652 | |
| 653 | phy = _of_phy_get(np, index); |
| 654 | if (!IS_ERR(phy)) { |
| 655 | *ptr = phy; |
| 656 | devres_add(dev, ptr); |
| 657 | } else { |
| 658 | devres_free(ptr); |
| 659 | } |
| 660 | |
| 661 | return phy; |
| 662 | } |
| 663 | EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); |
| 664 | |
| 665 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 666 | * phy_create() - create a new phy |
| 667 | * @dev: device that is creating the new phy |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 668 | * @node: device node of the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 669 | * @ops: function pointers for performing phy operations |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 670 | * |
| 671 | * Called to create a phy using phy framework. |
| 672 | */ |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 673 | struct phy *phy_create(struct device *dev, struct device_node *node, |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 674 | const struct phy_ops *ops) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 675 | { |
| 676 | int ret; |
| 677 | int id; |
| 678 | struct phy *phy; |
| 679 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 680 | if (WARN_ON(!dev)) |
| 681 | return ERR_PTR(-EINVAL); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 682 | |
| 683 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 684 | if (!phy) |
| 685 | return ERR_PTR(-ENOMEM); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 686 | |
| 687 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); |
| 688 | if (id < 0) { |
| 689 | dev_err(dev, "unable to get id\n"); |
| 690 | ret = id; |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 691 | goto free_phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 692 | } |
| 693 | |
| 694 | device_initialize(&phy->dev); |
| 695 | mutex_init(&phy->mutex); |
| 696 | |
| 697 | phy->dev.class = phy_class; |
| 698 | phy->dev.parent = dev; |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 699 | phy->dev.of_node = node ?: dev->of_node; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 700 | phy->id = id; |
| 701 | phy->ops = ops; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 702 | |
| 703 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); |
| 704 | if (ret) |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 705 | goto put_dev; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 706 | |
Dmitry Torokhov | 87006dd | 2015-04-22 16:14:37 -0700 | [diff] [blame] | 707 | /* phy-supply */ |
| 708 | phy->pwr = regulator_get_optional(&phy->dev, "phy"); |
| 709 | if (IS_ERR(phy->pwr)) { |
| 710 | ret = PTR_ERR(phy->pwr); |
| 711 | if (ret == -EPROBE_DEFER) |
| 712 | goto put_dev; |
| 713 | |
| 714 | phy->pwr = NULL; |
| 715 | } |
| 716 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 717 | ret = device_add(&phy->dev); |
| 718 | if (ret) |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 719 | goto put_dev; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 720 | |
| 721 | if (pm_runtime_enabled(dev)) { |
| 722 | pm_runtime_enable(&phy->dev); |
| 723 | pm_runtime_no_callbacks(&phy->dev); |
| 724 | } |
| 725 | |
| 726 | return phy; |
| 727 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 728 | put_dev: |
Roger Quadros | e73b49f | 2014-07-10 11:55:02 +0530 | [diff] [blame] | 729 | put_device(&phy->dev); /* calls phy_release() which frees resources */ |
| 730 | return ERR_PTR(ret); |
| 731 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 732 | free_phy: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 733 | kfree(phy); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 734 | return ERR_PTR(ret); |
| 735 | } |
| 736 | EXPORT_SYMBOL_GPL(phy_create); |
| 737 | |
| 738 | /** |
| 739 | * devm_phy_create() - create a new phy |
| 740 | * @dev: device that is creating the new phy |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 741 | * @node: device node of the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 742 | * @ops: function pointers for performing phy operations |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 743 | * |
| 744 | * Creates a new PHY device adding it to the PHY class. |
| 745 | * While at that, it also associates the device with the phy using devres. |
| 746 | * On driver detach, release function is invoked on the devres data, |
| 747 | * then, devres data is freed. |
| 748 | */ |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 749 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 750 | const struct phy_ops *ops) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 751 | { |
| 752 | struct phy **ptr, *phy; |
| 753 | |
| 754 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); |
| 755 | if (!ptr) |
| 756 | return ERR_PTR(-ENOMEM); |
| 757 | |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 758 | phy = phy_create(dev, node, ops); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 759 | if (!IS_ERR(phy)) { |
| 760 | *ptr = phy; |
| 761 | devres_add(dev, ptr); |
| 762 | } else { |
| 763 | devres_free(ptr); |
| 764 | } |
| 765 | |
| 766 | return phy; |
| 767 | } |
| 768 | EXPORT_SYMBOL_GPL(devm_phy_create); |
| 769 | |
| 770 | /** |
| 771 | * phy_destroy() - destroy the phy |
| 772 | * @phy: the phy to be destroyed |
| 773 | * |
| 774 | * Called to destroy the phy. |
| 775 | */ |
| 776 | void phy_destroy(struct phy *phy) |
| 777 | { |
| 778 | pm_runtime_disable(&phy->dev); |
| 779 | device_unregister(&phy->dev); |
| 780 | } |
| 781 | EXPORT_SYMBOL_GPL(phy_destroy); |
| 782 | |
| 783 | /** |
| 784 | * devm_phy_destroy() - destroy the PHY |
| 785 | * @dev: device that wants to release this phy |
| 786 | * @phy: the phy returned by devm_phy_get() |
| 787 | * |
| 788 | * destroys the devres associated with this phy and invokes phy_destroy |
| 789 | * to destroy the phy. |
| 790 | */ |
| 791 | void devm_phy_destroy(struct device *dev, struct phy *phy) |
| 792 | { |
| 793 | int r; |
| 794 | |
| 795 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); |
| 796 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); |
| 797 | } |
| 798 | EXPORT_SYMBOL_GPL(devm_phy_destroy); |
| 799 | |
| 800 | /** |
| 801 | * __of_phy_provider_register() - create/register phy provider with the framework |
| 802 | * @dev: struct device of the phy provider |
| 803 | * @owner: the module owner containing of_xlate |
| 804 | * @of_xlate: function pointer to obtain phy instance from phy provider |
| 805 | * |
| 806 | * Creates struct phy_provider from dev and of_xlate function pointer. |
| 807 | * This is used in the case of dt boot for finding the phy instance from |
| 808 | * phy provider. |
| 809 | */ |
| 810 | struct phy_provider *__of_phy_provider_register(struct device *dev, |
| 811 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, |
| 812 | struct of_phandle_args *args)) |
| 813 | { |
| 814 | struct phy_provider *phy_provider; |
| 815 | |
| 816 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); |
| 817 | if (!phy_provider) |
| 818 | return ERR_PTR(-ENOMEM); |
| 819 | |
| 820 | phy_provider->dev = dev; |
| 821 | phy_provider->owner = owner; |
| 822 | phy_provider->of_xlate = of_xlate; |
| 823 | |
| 824 | mutex_lock(&phy_provider_mutex); |
| 825 | list_add_tail(&phy_provider->list, &phy_provider_list); |
| 826 | mutex_unlock(&phy_provider_mutex); |
| 827 | |
| 828 | return phy_provider; |
| 829 | } |
| 830 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); |
| 831 | |
| 832 | /** |
| 833 | * __devm_of_phy_provider_register() - create/register phy provider with the |
| 834 | * framework |
| 835 | * @dev: struct device of the phy provider |
| 836 | * @owner: the module owner containing of_xlate |
| 837 | * @of_xlate: function pointer to obtain phy instance from phy provider |
| 838 | * |
| 839 | * Creates struct phy_provider from dev and of_xlate function pointer. |
| 840 | * This is used in the case of dt boot for finding the phy instance from |
| 841 | * phy provider. While at that, it also associates the device with the |
| 842 | * phy provider using devres. On driver detach, release function is invoked |
| 843 | * on the devres data, then, devres data is freed. |
| 844 | */ |
| 845 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, |
| 846 | struct module *owner, struct phy * (*of_xlate)(struct device *dev, |
| 847 | struct of_phandle_args *args)) |
| 848 | { |
| 849 | struct phy_provider **ptr, *phy_provider; |
| 850 | |
| 851 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); |
| 852 | if (!ptr) |
| 853 | return ERR_PTR(-ENOMEM); |
| 854 | |
| 855 | phy_provider = __of_phy_provider_register(dev, owner, of_xlate); |
| 856 | if (!IS_ERR(phy_provider)) { |
| 857 | *ptr = phy_provider; |
| 858 | devres_add(dev, ptr); |
| 859 | } else { |
| 860 | devres_free(ptr); |
| 861 | } |
| 862 | |
| 863 | return phy_provider; |
| 864 | } |
| 865 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); |
| 866 | |
| 867 | /** |
| 868 | * of_phy_provider_unregister() - unregister phy provider from the framework |
| 869 | * @phy_provider: phy provider returned by of_phy_provider_register() |
| 870 | * |
| 871 | * Removes the phy_provider created using of_phy_provider_register(). |
| 872 | */ |
| 873 | void of_phy_provider_unregister(struct phy_provider *phy_provider) |
| 874 | { |
| 875 | if (IS_ERR(phy_provider)) |
| 876 | return; |
| 877 | |
| 878 | mutex_lock(&phy_provider_mutex); |
| 879 | list_del(&phy_provider->list); |
| 880 | kfree(phy_provider); |
| 881 | mutex_unlock(&phy_provider_mutex); |
| 882 | } |
| 883 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); |
| 884 | |
| 885 | /** |
| 886 | * devm_of_phy_provider_unregister() - remove phy provider from the framework |
| 887 | * @dev: struct device of the phy provider |
| 888 | * |
| 889 | * destroys the devres associated with this phy provider and invokes |
| 890 | * of_phy_provider_unregister to unregister the phy provider. |
| 891 | */ |
| 892 | void devm_of_phy_provider_unregister(struct device *dev, |
| 893 | struct phy_provider *phy_provider) { |
| 894 | int r; |
| 895 | |
| 896 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, |
| 897 | phy_provider); |
| 898 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); |
| 899 | } |
| 900 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); |
| 901 | |
| 902 | /** |
| 903 | * phy_release() - release the phy |
| 904 | * @dev: the dev member within phy |
| 905 | * |
| 906 | * When the last reference to the device is removed, it is called |
| 907 | * from the embedded kobject as release method. |
| 908 | */ |
| 909 | static void phy_release(struct device *dev) |
| 910 | { |
| 911 | struct phy *phy; |
| 912 | |
| 913 | phy = to_phy(dev); |
| 914 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 915 | regulator_put(phy->pwr); |
Roger Quadros | e73b49f | 2014-07-10 11:55:02 +0530 | [diff] [blame] | 916 | ida_simple_remove(&phy_ida, phy->id); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 917 | kfree(phy); |
| 918 | } |
| 919 | |
| 920 | static int __init phy_core_init(void) |
| 921 | { |
| 922 | phy_class = class_create(THIS_MODULE, "phy"); |
| 923 | if (IS_ERR(phy_class)) { |
| 924 | pr_err("failed to create phy class --> %ld\n", |
| 925 | PTR_ERR(phy_class)); |
| 926 | return PTR_ERR(phy_class); |
| 927 | } |
| 928 | |
| 929 | phy_class->dev_release = phy_release; |
| 930 | |
| 931 | return 0; |
| 932 | } |
| 933 | module_init(phy_core_init); |
| 934 | |
| 935 | static void __exit phy_core_exit(void) |
| 936 | { |
| 937 | class_destroy(phy_class); |
| 938 | } |
| 939 | module_exit(phy_core_exit); |
| 940 | |
| 941 | MODULE_DESCRIPTION("Generic PHY Framework"); |
| 942 | MODULE_AUTHOR("Kishon Vijay Abraham I <kishon@ti.com>"); |
| 943 | MODULE_LICENSE("GPL v2"); |