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 | b7bc15b | 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 | b7bc15b | 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 | b7bc15b | 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 | b7bc15b | 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 | |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 144 | for_each_child_of_node(phy_provider->children, child) |
Kishon Vijay Abraham I | 2a4c370 | 2014-07-14 15:55:01 +0530 | [diff] [blame] | 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 | |
Manu Gautam | 8866df2 | 2018-03-20 11:31:47 +0530 | [diff] [blame] | 156 | if (!phy) |
| 157 | return 0; |
| 158 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 159 | if (!pm_runtime_enabled(&phy->dev)) |
| 160 | return -ENOTSUPP; |
| 161 | |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 162 | ret = pm_runtime_get(&phy->dev); |
| 163 | if (ret < 0 && ret != -EINPROGRESS) |
| 164 | pm_runtime_put_noidle(&phy->dev); |
| 165 | |
| 166 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 167 | } |
| 168 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get); |
| 169 | |
| 170 | int phy_pm_runtime_get_sync(struct phy *phy) |
| 171 | { |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 172 | int ret; |
| 173 | |
Manu Gautam | 8866df2 | 2018-03-20 11:31:47 +0530 | [diff] [blame] | 174 | if (!phy) |
| 175 | return 0; |
| 176 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 177 | if (!pm_runtime_enabled(&phy->dev)) |
| 178 | return -ENOTSUPP; |
| 179 | |
Felipe Balbi | cedb7f8 | 2013-12-20 15:00:48 -0600 | [diff] [blame] | 180 | ret = pm_runtime_get_sync(&phy->dev); |
| 181 | if (ret < 0) |
| 182 | pm_runtime_put_sync(&phy->dev); |
| 183 | |
| 184 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 185 | } |
| 186 | EXPORT_SYMBOL_GPL(phy_pm_runtime_get_sync); |
| 187 | |
| 188 | int phy_pm_runtime_put(struct phy *phy) |
| 189 | { |
Manu Gautam | 8866df2 | 2018-03-20 11:31:47 +0530 | [diff] [blame] | 190 | if (!phy) |
| 191 | return 0; |
| 192 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 193 | if (!pm_runtime_enabled(&phy->dev)) |
| 194 | return -ENOTSUPP; |
| 195 | |
| 196 | return pm_runtime_put(&phy->dev); |
| 197 | } |
| 198 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put); |
| 199 | |
| 200 | int phy_pm_runtime_put_sync(struct phy *phy) |
| 201 | { |
Manu Gautam | 8866df2 | 2018-03-20 11:31:47 +0530 | [diff] [blame] | 202 | if (!phy) |
| 203 | return 0; |
| 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 | |
| 208 | return pm_runtime_put_sync(&phy->dev); |
| 209 | } |
| 210 | EXPORT_SYMBOL_GPL(phy_pm_runtime_put_sync); |
| 211 | |
| 212 | void phy_pm_runtime_allow(struct phy *phy) |
| 213 | { |
Manu Gautam | 8866df2 | 2018-03-20 11:31:47 +0530 | [diff] [blame] | 214 | if (!phy) |
| 215 | return; |
| 216 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 217 | if (!pm_runtime_enabled(&phy->dev)) |
| 218 | return; |
| 219 | |
| 220 | pm_runtime_allow(&phy->dev); |
| 221 | } |
| 222 | EXPORT_SYMBOL_GPL(phy_pm_runtime_allow); |
| 223 | |
| 224 | void phy_pm_runtime_forbid(struct phy *phy) |
| 225 | { |
Manu Gautam | 8866df2 | 2018-03-20 11:31:47 +0530 | [diff] [blame] | 226 | if (!phy) |
| 227 | return; |
| 228 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 229 | if (!pm_runtime_enabled(&phy->dev)) |
| 230 | return; |
| 231 | |
| 232 | pm_runtime_forbid(&phy->dev); |
| 233 | } |
| 234 | EXPORT_SYMBOL_GPL(phy_pm_runtime_forbid); |
| 235 | |
| 236 | int phy_init(struct phy *phy) |
| 237 | { |
| 238 | int ret; |
| 239 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 240 | if (!phy) |
| 241 | return 0; |
| 242 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 243 | ret = phy_pm_runtime_get_sync(phy); |
| 244 | if (ret < 0 && ret != -ENOTSUPP) |
| 245 | return ret; |
Axel Lin | 736b67a3 | 2015-03-06 15:55:10 +0800 | [diff] [blame] | 246 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 247 | |
| 248 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 249 | if (phy->init_count == 0 && phy->ops->init) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 250 | ret = phy->ops->init(phy); |
| 251 | if (ret < 0) { |
| 252 | dev_err(&phy->dev, "phy init failed --> %d\n", ret); |
| 253 | goto out; |
| 254 | } |
| 255 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 256 | ++phy->init_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 257 | |
| 258 | out: |
| 259 | mutex_unlock(&phy->mutex); |
| 260 | phy_pm_runtime_put(phy); |
| 261 | return ret; |
| 262 | } |
| 263 | EXPORT_SYMBOL_GPL(phy_init); |
| 264 | |
| 265 | int phy_exit(struct phy *phy) |
| 266 | { |
| 267 | int ret; |
| 268 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 269 | if (!phy) |
| 270 | return 0; |
| 271 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 272 | ret = phy_pm_runtime_get_sync(phy); |
| 273 | if (ret < 0 && ret != -ENOTSUPP) |
| 274 | return ret; |
Axel Lin | 736b67a3 | 2015-03-06 15:55:10 +0800 | [diff] [blame] | 275 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 276 | |
| 277 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 278 | if (phy->init_count == 1 && phy->ops->exit) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 279 | ret = phy->ops->exit(phy); |
| 280 | if (ret < 0) { |
| 281 | dev_err(&phy->dev, "phy exit failed --> %d\n", ret); |
| 282 | goto out; |
| 283 | } |
| 284 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 285 | --phy->init_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 286 | |
| 287 | out: |
| 288 | mutex_unlock(&phy->mutex); |
| 289 | phy_pm_runtime_put(phy); |
| 290 | return ret; |
| 291 | } |
| 292 | EXPORT_SYMBOL_GPL(phy_exit); |
| 293 | |
| 294 | int phy_power_on(struct phy *phy) |
| 295 | { |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 296 | int ret = 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 297 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 298 | if (!phy) |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 299 | goto out; |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 300 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 301 | if (phy->pwr) { |
| 302 | ret = regulator_enable(phy->pwr); |
| 303 | if (ret) |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 304 | goto out; |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 305 | } |
| 306 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 307 | ret = phy_pm_runtime_get_sync(phy); |
| 308 | if (ret < 0 && ret != -ENOTSUPP) |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 309 | goto err_pm_sync; |
| 310 | |
Axel Lin | 736b67a3 | 2015-03-06 15:55:10 +0800 | [diff] [blame] | 311 | ret = 0; /* Override possible ret == -ENOTSUPP */ |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 312 | |
| 313 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 314 | if (phy->power_count == 0 && phy->ops->power_on) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 315 | ret = phy->ops->power_on(phy); |
| 316 | if (ret < 0) { |
| 317 | dev_err(&phy->dev, "phy poweron failed --> %d\n", ret); |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 318 | goto err_pwr_on; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 319 | } |
| 320 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 321 | ++phy->power_count; |
| 322 | mutex_unlock(&phy->mutex); |
| 323 | return 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 324 | |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 325 | err_pwr_on: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 326 | mutex_unlock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 327 | phy_pm_runtime_put_sync(phy); |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 328 | err_pm_sync: |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 329 | if (phy->pwr) |
| 330 | regulator_disable(phy->pwr); |
Shawn Lin | b82fcab | 2016-01-28 16:14:18 +0800 | [diff] [blame] | 331 | out: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 332 | return ret; |
| 333 | } |
| 334 | EXPORT_SYMBOL_GPL(phy_power_on); |
| 335 | |
| 336 | int phy_power_off(struct phy *phy) |
| 337 | { |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 338 | int ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 339 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 340 | if (!phy) |
| 341 | return 0; |
| 342 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 343 | mutex_lock(&phy->mutex); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 344 | if (phy->power_count == 1 && phy->ops->power_off) { |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 345 | ret = phy->ops->power_off(phy); |
| 346 | if (ret < 0) { |
| 347 | dev_err(&phy->dev, "phy poweroff failed --> %d\n", ret); |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 348 | mutex_unlock(&phy->mutex); |
| 349 | return ret; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 350 | } |
| 351 | } |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 352 | --phy->power_count; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 353 | mutex_unlock(&phy->mutex); |
| 354 | phy_pm_runtime_put(phy); |
| 355 | |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 356 | if (phy->pwr) |
| 357 | regulator_disable(phy->pwr); |
| 358 | |
Kishon Vijay Abraham I | 637d378 | 2013-12-20 10:36:49 +0530 | [diff] [blame] | 359 | return 0; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 360 | } |
| 361 | EXPORT_SYMBOL_GPL(phy_power_off); |
| 362 | |
Grygorii Strashko | 79a5a18 | 2018-11-19 19:24:20 -0600 | [diff] [blame] | 363 | int phy_set_mode_ext(struct phy *phy, enum phy_mode mode, int submode) |
David Lechner | 300eb01 | 2016-05-09 18:39:59 -0500 | [diff] [blame] | 364 | { |
| 365 | int ret; |
| 366 | |
| 367 | if (!phy || !phy->ops->set_mode) |
| 368 | return 0; |
| 369 | |
| 370 | mutex_lock(&phy->mutex); |
Grygorii Strashko | 79a5a18 | 2018-11-19 19:24:20 -0600 | [diff] [blame] | 371 | ret = phy->ops->set_mode(phy, mode, submode); |
Manu Gautam | 3b3cd24 | 2018-01-16 16:27:09 +0530 | [diff] [blame] | 372 | if (!ret) |
| 373 | phy->attrs.mode = mode; |
David Lechner | 300eb01 | 2016-05-09 18:39:59 -0500 | [diff] [blame] | 374 | mutex_unlock(&phy->mutex); |
| 375 | |
| 376 | return ret; |
| 377 | } |
Grygorii Strashko | 79a5a18 | 2018-11-19 19:24:20 -0600 | [diff] [blame] | 378 | EXPORT_SYMBOL_GPL(phy_set_mode_ext); |
David Lechner | 300eb01 | 2016-05-09 18:39:59 -0500 | [diff] [blame] | 379 | |
Randy Li | cac18ec | 2016-09-10 02:59:37 +0800 | [diff] [blame] | 380 | int phy_reset(struct phy *phy) |
| 381 | { |
| 382 | int ret; |
| 383 | |
| 384 | if (!phy || !phy->ops->reset) |
| 385 | return 0; |
| 386 | |
| 387 | mutex_lock(&phy->mutex); |
| 388 | ret = phy->ops->reset(phy); |
| 389 | mutex_unlock(&phy->mutex); |
| 390 | |
| 391 | return ret; |
| 392 | } |
| 393 | EXPORT_SYMBOL_GPL(phy_reset); |
| 394 | |
Andrzej Pietrasiewicz | 3691411 | 2017-10-09 14:00:50 +0200 | [diff] [blame] | 395 | int phy_calibrate(struct phy *phy) |
| 396 | { |
| 397 | int ret; |
| 398 | |
| 399 | if (!phy || !phy->ops->calibrate) |
| 400 | return 0; |
| 401 | |
| 402 | mutex_lock(&phy->mutex); |
| 403 | ret = phy->ops->calibrate(phy); |
| 404 | mutex_unlock(&phy->mutex); |
| 405 | |
| 406 | return ret; |
| 407 | } |
| 408 | EXPORT_SYMBOL_GPL(phy_calibrate); |
| 409 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 410 | /** |
Maxime Ripard | aeaac93 | 2018-12-07 14:55:29 +0100 | [diff] [blame] | 411 | * phy_configure() - Changes the phy parameters |
| 412 | * @phy: the phy returned by phy_get() |
| 413 | * @opts: New configuration to apply |
| 414 | * |
| 415 | * Used to change the PHY parameters. phy_init() must have been called |
| 416 | * on the phy. The configuration will be applied on the current phy |
| 417 | * mode, that can be changed using phy_set_mode(). |
| 418 | * |
| 419 | * Returns: 0 if successful, an negative error code otherwise |
| 420 | */ |
| 421 | int phy_configure(struct phy *phy, union phy_configure_opts *opts) |
| 422 | { |
| 423 | int ret; |
| 424 | |
| 425 | if (!phy) |
| 426 | return -EINVAL; |
| 427 | |
| 428 | if (!phy->ops->configure) |
| 429 | return -EOPNOTSUPP; |
| 430 | |
| 431 | mutex_lock(&phy->mutex); |
| 432 | ret = phy->ops->configure(phy, opts); |
| 433 | mutex_unlock(&phy->mutex); |
| 434 | |
| 435 | return ret; |
| 436 | } |
| 437 | EXPORT_SYMBOL_GPL(phy_configure); |
| 438 | |
| 439 | /** |
| 440 | * phy_validate() - Checks the phy parameters |
| 441 | * @phy: the phy returned by phy_get() |
| 442 | * @mode: phy_mode the configuration is applicable to. |
| 443 | * @submode: PHY submode the configuration is applicable to. |
| 444 | * @opts: Configuration to check |
| 445 | * |
| 446 | * Used to check that the current set of parameters can be handled by |
| 447 | * the phy. Implementations are free to tune the parameters passed as |
| 448 | * arguments if needed by some implementation detail or |
| 449 | * constraints. It will not change any actual configuration of the |
| 450 | * PHY, so calling it as many times as deemed fit will have no side |
| 451 | * effect. |
| 452 | * |
| 453 | * Returns: 0 if successful, an negative error code otherwise |
| 454 | */ |
| 455 | int phy_validate(struct phy *phy, enum phy_mode mode, int submode, |
| 456 | union phy_configure_opts *opts) |
| 457 | { |
| 458 | int ret; |
| 459 | |
| 460 | if (!phy) |
| 461 | return -EINVAL; |
| 462 | |
| 463 | if (!phy->ops->validate) |
| 464 | return -EOPNOTSUPP; |
| 465 | |
| 466 | mutex_lock(&phy->mutex); |
| 467 | ret = phy->ops->validate(phy, mode, submode, opts); |
| 468 | mutex_unlock(&phy->mutex); |
| 469 | |
| 470 | return ret; |
| 471 | } |
| 472 | EXPORT_SYMBOL_GPL(phy_validate); |
| 473 | |
| 474 | /** |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 475 | * _of_phy_get() - lookup and obtain a reference to a phy by phandle |
| 476 | * @np: device_node for which to get the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 477 | * @index: the index of the phy |
| 478 | * |
| 479 | * Returns the phy associated with the given phandle value, |
| 480 | * after getting a refcount to it or -ENODEV if there is no such phy or |
| 481 | * -EPROBE_DEFER if there is a phandle to the phy, but the device is |
| 482 | * not yet loaded. This function uses of_xlate call back function provided |
| 483 | * while registering the phy_provider to find the phy instance. |
| 484 | */ |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 485 | 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] | 486 | { |
| 487 | int ret; |
| 488 | struct phy_provider *phy_provider; |
| 489 | struct phy *phy = NULL; |
| 490 | struct of_phandle_args args; |
| 491 | |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 492 | ret = of_parse_phandle_with_args(np, "phys", "#phy-cells", |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 493 | index, &args); |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 494 | if (ret) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 495 | return ERR_PTR(-ENODEV); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 496 | |
Arnd Bergmann | b7563e2 | 2018-01-12 11:12:05 +0100 | [diff] [blame] | 497 | /* This phy type handled by the usb-phy subsystem for now */ |
| 498 | if (of_device_is_compatible(args.np, "usb-nop-xceiv")) |
| 499 | return ERR_PTR(-ENODEV); |
| 500 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 501 | mutex_lock(&phy_provider_mutex); |
| 502 | phy_provider = of_phy_provider_lookup(args.np); |
| 503 | if (IS_ERR(phy_provider) || !try_module_get(phy_provider->owner)) { |
| 504 | phy = ERR_PTR(-EPROBE_DEFER); |
Axel Lin | 33f434d | 2015-04-07 12:23:38 +0800 | [diff] [blame] | 505 | goto out_unlock; |
| 506 | } |
| 507 | |
| 508 | if (!of_device_is_available(args.np)) { |
| 509 | dev_warn(phy_provider->dev, "Requested PHY is disabled\n"); |
| 510 | phy = ERR_PTR(-ENODEV); |
| 511 | goto out_put_module; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 512 | } |
| 513 | |
| 514 | phy = phy_provider->of_xlate(phy_provider->dev, &args); |
Axel Lin | 33f434d | 2015-04-07 12:23:38 +0800 | [diff] [blame] | 515 | |
| 516 | out_put_module: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 517 | module_put(phy_provider->owner); |
| 518 | |
Axel Lin | 33f434d | 2015-04-07 12:23:38 +0800 | [diff] [blame] | 519 | out_unlock: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 520 | mutex_unlock(&phy_provider_mutex); |
| 521 | of_node_put(args.np); |
| 522 | |
| 523 | return phy; |
| 524 | } |
| 525 | |
| 526 | /** |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 527 | * of_phy_get() - lookup and obtain a reference to a phy using a device_node. |
| 528 | * @np: device_node for which to get the phy |
| 529 | * @con_id: name of the phy from device's point of view |
| 530 | * |
| 531 | * Returns the phy driver, after getting a refcount to it; or |
| 532 | * -ENODEV if there is no such phy. The caller is responsible for |
| 533 | * calling phy_put() to release that count. |
| 534 | */ |
| 535 | struct phy *of_phy_get(struct device_node *np, const char *con_id) |
| 536 | { |
| 537 | struct phy *phy = NULL; |
| 538 | int index = 0; |
| 539 | |
| 540 | if (con_id) |
| 541 | index = of_property_match_string(np, "phy-names", con_id); |
| 542 | |
| 543 | phy = _of_phy_get(np, index); |
| 544 | if (IS_ERR(phy)) |
| 545 | return phy; |
| 546 | |
| 547 | if (!try_module_get(phy->ops->owner)) |
| 548 | return ERR_PTR(-EPROBE_DEFER); |
| 549 | |
| 550 | get_device(&phy->dev); |
| 551 | |
| 552 | return phy; |
| 553 | } |
| 554 | EXPORT_SYMBOL_GPL(of_phy_get); |
| 555 | |
| 556 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 557 | * phy_put() - release the PHY |
| 558 | * @phy: the phy returned by phy_get() |
| 559 | * |
| 560 | * Releases a refcount the caller received from phy_get(). |
| 561 | */ |
| 562 | void phy_put(struct phy *phy) |
| 563 | { |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 564 | if (!phy || IS_ERR(phy)) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 565 | return; |
| 566 | |
| 567 | module_put(phy->ops->owner); |
| 568 | put_device(&phy->dev); |
| 569 | } |
| 570 | EXPORT_SYMBOL_GPL(phy_put); |
| 571 | |
| 572 | /** |
| 573 | * devm_phy_put() - release the PHY |
| 574 | * @dev: device that wants to release this phy |
| 575 | * @phy: the phy returned by devm_phy_get() |
| 576 | * |
| 577 | * destroys the devres associated with this phy and invokes phy_put |
| 578 | * to release the phy. |
| 579 | */ |
| 580 | void devm_phy_put(struct device *dev, struct phy *phy) |
| 581 | { |
| 582 | int r; |
| 583 | |
Andrew Lunn | 04c2fac | 2014-02-04 18:33:11 +0100 | [diff] [blame] | 584 | if (!phy) |
| 585 | return; |
| 586 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 587 | r = devres_destroy(dev, devm_phy_release, devm_phy_match, phy); |
| 588 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); |
| 589 | } |
| 590 | EXPORT_SYMBOL_GPL(devm_phy_put); |
| 591 | |
| 592 | /** |
| 593 | * of_phy_simple_xlate() - returns the phy instance from phy provider |
| 594 | * @dev: the PHY provider device |
| 595 | * @args: of_phandle_args (not used here) |
| 596 | * |
| 597 | * Intended to be used by phy provider for the common case where #phy-cells is |
| 598 | * 0. For other cases where #phy-cells is greater than '0', the phy provider |
| 599 | * should provide a custom of_xlate function that reads the *args* and returns |
| 600 | * the appropriate phy. |
| 601 | */ |
| 602 | struct phy *of_phy_simple_xlate(struct device *dev, struct of_phandle_args |
| 603 | *args) |
| 604 | { |
| 605 | struct phy *phy; |
| 606 | struct class_dev_iter iter; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 607 | |
| 608 | class_dev_iter_init(&iter, phy_class, NULL, NULL); |
| 609 | while ((dev = class_dev_iter_next(&iter))) { |
| 610 | phy = to_phy(dev); |
Kishon Vijay Abraham I | 491e049 | 2014-10-31 14:04:20 +0530 | [diff] [blame] | 611 | if (args->np != phy->dev.of_node) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 612 | continue; |
| 613 | |
| 614 | class_dev_iter_exit(&iter); |
| 615 | return phy; |
| 616 | } |
| 617 | |
| 618 | class_dev_iter_exit(&iter); |
| 619 | return ERR_PTR(-ENODEV); |
| 620 | } |
| 621 | EXPORT_SYMBOL_GPL(of_phy_simple_xlate); |
| 622 | |
| 623 | /** |
| 624 | * phy_get() - lookup and obtain a reference to a phy. |
| 625 | * @dev: device that requests this phy |
| 626 | * @string: the phy name as given in the dt data or the name of the controller |
| 627 | * port for non-dt case |
| 628 | * |
| 629 | * Returns the phy driver, after getting a refcount to it; or |
| 630 | * -ENODEV if there is no such phy. The caller is responsible for |
| 631 | * calling phy_put() to release that count. |
| 632 | */ |
| 633 | struct phy *phy_get(struct device *dev, const char *string) |
| 634 | { |
| 635 | int index = 0; |
Kishon Vijay Abraham I | d18c960 | 2013-12-19 20:01:44 +0530 | [diff] [blame] | 636 | struct phy *phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 637 | |
| 638 | if (string == NULL) { |
| 639 | dev_WARN(dev, "missing string\n"); |
| 640 | return ERR_PTR(-EINVAL); |
| 641 | } |
| 642 | |
| 643 | if (dev->of_node) { |
| 644 | index = of_property_match_string(dev->of_node, "phy-names", |
| 645 | string); |
Kamil Debski | 0b3f3b2 | 2014-03-06 12:16:46 +0100 | [diff] [blame] | 646 | phy = _of_phy_get(dev->of_node, index); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 647 | } else { |
Heikki Krogerus | b7bc15b | 2014-11-19 17:28:18 +0200 | [diff] [blame] | 648 | phy = phy_find(dev, string); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 649 | } |
Hans de Goede | f40037f | 2014-02-17 14:29:22 +0530 | [diff] [blame] | 650 | if (IS_ERR(phy)) |
| 651 | return phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 652 | |
| 653 | if (!try_module_get(phy->ops->owner)) |
| 654 | return ERR_PTR(-EPROBE_DEFER); |
| 655 | |
| 656 | get_device(&phy->dev); |
| 657 | |
| 658 | return phy; |
| 659 | } |
| 660 | EXPORT_SYMBOL_GPL(phy_get); |
| 661 | |
| 662 | /** |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 663 | * phy_optional_get() - lookup and obtain a reference to an optional phy. |
| 664 | * @dev: device that requests this phy |
| 665 | * @string: the phy name as given in the dt data or the name of the controller |
| 666 | * port for non-dt case |
| 667 | * |
| 668 | * Returns the phy driver, after getting a refcount to it; or |
| 669 | * NULL if there is no such phy. The caller is responsible for |
| 670 | * calling phy_put() to release that count. |
| 671 | */ |
| 672 | struct phy *phy_optional_get(struct device *dev, const char *string) |
| 673 | { |
| 674 | struct phy *phy = phy_get(dev, string); |
| 675 | |
Axel Lin | f83be4c | 2015-04-08 07:30:15 +0800 | [diff] [blame] | 676 | if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV)) |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 677 | phy = NULL; |
| 678 | |
| 679 | return phy; |
| 680 | } |
| 681 | EXPORT_SYMBOL_GPL(phy_optional_get); |
| 682 | |
| 683 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 684 | * devm_phy_get() - lookup and obtain a reference to a phy. |
| 685 | * @dev: device that requests this phy |
| 686 | * @string: the phy name as given in the dt data or phy device name |
| 687 | * for non-dt case |
| 688 | * |
| 689 | * Gets the phy using phy_get(), and associates a device with it using |
| 690 | * devres. On driver detach, release function is invoked on the devres data, |
| 691 | * then, devres data is freed. |
| 692 | */ |
| 693 | struct phy *devm_phy_get(struct device *dev, const char *string) |
| 694 | { |
| 695 | struct phy **ptr, *phy; |
| 696 | |
| 697 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 698 | if (!ptr) |
| 699 | return ERR_PTR(-ENOMEM); |
| 700 | |
| 701 | phy = phy_get(dev, string); |
| 702 | if (!IS_ERR(phy)) { |
| 703 | *ptr = phy; |
| 704 | devres_add(dev, ptr); |
| 705 | } else { |
| 706 | devres_free(ptr); |
| 707 | } |
| 708 | |
| 709 | return phy; |
| 710 | } |
| 711 | EXPORT_SYMBOL_GPL(devm_phy_get); |
| 712 | |
| 713 | /** |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 714 | * devm_phy_optional_get() - lookup and obtain a reference to an optional phy. |
| 715 | * @dev: device that requests this phy |
| 716 | * @string: the phy name as given in the dt data or phy device name |
| 717 | * for non-dt case |
| 718 | * |
| 719 | * Gets the phy using phy_get(), and associates a device with it using |
| 720 | * devres. On driver detach, release function is invoked on the devres |
| 721 | * data, then, devres data is freed. This differs to devm_phy_get() in |
| 722 | * that if the phy does not exist, it is not considered an error and |
| 723 | * -ENODEV will not be returned. Instead the NULL phy is returned, |
| 724 | * which can be passed to all other phy consumer calls. |
| 725 | */ |
| 726 | struct phy *devm_phy_optional_get(struct device *dev, const char *string) |
| 727 | { |
| 728 | struct phy *phy = devm_phy_get(dev, string); |
| 729 | |
Axel Lin | f83be4c | 2015-04-08 07:30:15 +0800 | [diff] [blame] | 730 | if (IS_ERR(phy) && (PTR_ERR(phy) == -ENODEV)) |
Andrew Lunn | 788a4d5 | 2014-02-04 18:33:12 +0100 | [diff] [blame] | 731 | phy = NULL; |
| 732 | |
| 733 | return phy; |
| 734 | } |
| 735 | EXPORT_SYMBOL_GPL(devm_phy_optional_get); |
| 736 | |
| 737 | /** |
Kamil Debski | b5d682f | 2014-03-06 12:16:47 +0100 | [diff] [blame] | 738 | * devm_of_phy_get() - lookup and obtain a reference to a phy. |
| 739 | * @dev: device that requests this phy |
| 740 | * @np: node containing the phy |
| 741 | * @con_id: name of the phy from device's point of view |
| 742 | * |
| 743 | * Gets the phy using of_phy_get(), and associates a device with it using |
| 744 | * devres. On driver detach, release function is invoked on the devres data, |
| 745 | * then, devres data is freed. |
| 746 | */ |
| 747 | struct phy *devm_of_phy_get(struct device *dev, struct device_node *np, |
| 748 | const char *con_id) |
| 749 | { |
| 750 | struct phy **ptr, *phy; |
| 751 | |
| 752 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 753 | if (!ptr) |
| 754 | return ERR_PTR(-ENOMEM); |
| 755 | |
| 756 | phy = of_phy_get(np, con_id); |
| 757 | if (!IS_ERR(phy)) { |
| 758 | *ptr = phy; |
| 759 | devres_add(dev, ptr); |
| 760 | } else { |
| 761 | devres_free(ptr); |
| 762 | } |
| 763 | |
| 764 | return phy; |
| 765 | } |
| 766 | EXPORT_SYMBOL_GPL(devm_of_phy_get); |
| 767 | |
| 768 | /** |
Arun Ramamurthy | 6be109b | 2015-04-22 16:04:11 -0700 | [diff] [blame] | 769 | * devm_of_phy_get_by_index() - lookup and obtain a reference to a phy by index. |
| 770 | * @dev: device that requests this phy |
| 771 | * @np: node containing the phy |
| 772 | * @index: index of the phy |
| 773 | * |
Chunfeng Yun | 70874462 | 2015-12-04 10:06:29 +0800 | [diff] [blame] | 774 | * Gets the phy using _of_phy_get(), then gets a refcount to it, |
| 775 | * and associates a device with it using devres. On driver detach, |
| 776 | * release function is invoked on the devres data, |
Arun Ramamurthy | 6be109b | 2015-04-22 16:04:11 -0700 | [diff] [blame] | 777 | * then, devres data is freed. |
| 778 | * |
| 779 | */ |
| 780 | struct phy *devm_of_phy_get_by_index(struct device *dev, struct device_node *np, |
| 781 | int index) |
| 782 | { |
| 783 | struct phy **ptr, *phy; |
| 784 | |
| 785 | ptr = devres_alloc(devm_phy_release, sizeof(*ptr), GFP_KERNEL); |
| 786 | if (!ptr) |
| 787 | return ERR_PTR(-ENOMEM); |
| 788 | |
| 789 | phy = _of_phy_get(np, index); |
Chunfeng Yun | 70874462 | 2015-12-04 10:06:29 +0800 | [diff] [blame] | 790 | if (IS_ERR(phy)) { |
Arun Ramamurthy | 6be109b | 2015-04-22 16:04:11 -0700 | [diff] [blame] | 791 | devres_free(ptr); |
Chunfeng Yun | 70874462 | 2015-12-04 10:06:29 +0800 | [diff] [blame] | 792 | return phy; |
Arun Ramamurthy | 6be109b | 2015-04-22 16:04:11 -0700 | [diff] [blame] | 793 | } |
| 794 | |
Chunfeng Yun | 70874462 | 2015-12-04 10:06:29 +0800 | [diff] [blame] | 795 | if (!try_module_get(phy->ops->owner)) { |
| 796 | devres_free(ptr); |
| 797 | return ERR_PTR(-EPROBE_DEFER); |
| 798 | } |
| 799 | |
| 800 | get_device(&phy->dev); |
| 801 | |
| 802 | *ptr = phy; |
| 803 | devres_add(dev, ptr); |
| 804 | |
Arun Ramamurthy | 6be109b | 2015-04-22 16:04:11 -0700 | [diff] [blame] | 805 | return phy; |
| 806 | } |
| 807 | EXPORT_SYMBOL_GPL(devm_of_phy_get_by_index); |
| 808 | |
| 809 | /** |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 810 | * phy_create() - create a new phy |
| 811 | * @dev: device that is creating the new phy |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 812 | * @node: device node of the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 813 | * @ops: function pointers for performing phy operations |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 814 | * |
| 815 | * Called to create a phy using phy framework. |
| 816 | */ |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 817 | struct phy *phy_create(struct device *dev, struct device_node *node, |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 818 | const struct phy_ops *ops) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 819 | { |
| 820 | int ret; |
| 821 | int id; |
| 822 | struct phy *phy; |
| 823 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 824 | if (WARN_ON(!dev)) |
| 825 | return ERR_PTR(-EINVAL); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 826 | |
| 827 | phy = kzalloc(sizeof(*phy), GFP_KERNEL); |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 828 | if (!phy) |
| 829 | return ERR_PTR(-ENOMEM); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 830 | |
| 831 | id = ida_simple_get(&phy_ida, 0, 0, GFP_KERNEL); |
| 832 | if (id < 0) { |
| 833 | dev_err(dev, "unable to get id\n"); |
| 834 | ret = id; |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 835 | goto free_phy; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 836 | } |
| 837 | |
| 838 | device_initialize(&phy->dev); |
| 839 | mutex_init(&phy->mutex); |
| 840 | |
| 841 | phy->dev.class = phy_class; |
| 842 | phy->dev.parent = dev; |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 843 | phy->dev.of_node = node ?: dev->of_node; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 844 | phy->id = id; |
| 845 | phy->ops = ops; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 846 | |
| 847 | ret = dev_set_name(&phy->dev, "phy-%s.%d", dev_name(dev), id); |
| 848 | if (ret) |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 849 | goto put_dev; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 850 | |
Dmitry Torokhov | 87006dd | 2015-04-22 16:14:37 -0700 | [diff] [blame] | 851 | /* phy-supply */ |
| 852 | phy->pwr = regulator_get_optional(&phy->dev, "phy"); |
| 853 | if (IS_ERR(phy->pwr)) { |
| 854 | ret = PTR_ERR(phy->pwr); |
| 855 | if (ret == -EPROBE_DEFER) |
| 856 | goto put_dev; |
| 857 | |
| 858 | phy->pwr = NULL; |
| 859 | } |
| 860 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 861 | ret = device_add(&phy->dev); |
| 862 | if (ret) |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 863 | goto put_dev; |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 864 | |
| 865 | if (pm_runtime_enabled(dev)) { |
| 866 | pm_runtime_enable(&phy->dev); |
| 867 | pm_runtime_no_callbacks(&phy->dev); |
| 868 | } |
| 869 | |
| 870 | return phy; |
| 871 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 872 | put_dev: |
Roger Quadros | e73b49f | 2014-07-10 11:55:02 +0530 | [diff] [blame] | 873 | put_device(&phy->dev); /* calls phy_release() which frees resources */ |
| 874 | return ERR_PTR(ret); |
| 875 | |
Dan Carpenter | 52797d2 | 2013-12-06 17:51:19 +0530 | [diff] [blame] | 876 | free_phy: |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 877 | kfree(phy); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 878 | return ERR_PTR(ret); |
| 879 | } |
| 880 | EXPORT_SYMBOL_GPL(phy_create); |
| 881 | |
| 882 | /** |
| 883 | * devm_phy_create() - create a new phy |
| 884 | * @dev: device that is creating the new phy |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 885 | * @node: device node of the phy |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 886 | * @ops: function pointers for performing phy operations |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 887 | * |
| 888 | * Creates a new PHY device adding it to the PHY class. |
| 889 | * While at that, it also associates the device with the phy using devres. |
| 890 | * On driver detach, release function is invoked on the devres data, |
| 891 | * then, devres data is freed. |
| 892 | */ |
Kishon Vijay Abraham I | f0ed817 | 2014-07-14 15:55:02 +0530 | [diff] [blame] | 893 | struct phy *devm_phy_create(struct device *dev, struct device_node *node, |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 894 | const struct phy_ops *ops) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 895 | { |
| 896 | struct phy **ptr, *phy; |
| 897 | |
| 898 | ptr = devres_alloc(devm_phy_consume, sizeof(*ptr), GFP_KERNEL); |
| 899 | if (!ptr) |
| 900 | return ERR_PTR(-ENOMEM); |
| 901 | |
Heikki Krogerus | dbc9863 | 2014-11-19 17:28:21 +0200 | [diff] [blame] | 902 | phy = phy_create(dev, node, ops); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 903 | if (!IS_ERR(phy)) { |
| 904 | *ptr = phy; |
| 905 | devres_add(dev, ptr); |
| 906 | } else { |
| 907 | devres_free(ptr); |
| 908 | } |
| 909 | |
| 910 | return phy; |
| 911 | } |
| 912 | EXPORT_SYMBOL_GPL(devm_phy_create); |
| 913 | |
| 914 | /** |
| 915 | * phy_destroy() - destroy the phy |
| 916 | * @phy: the phy to be destroyed |
| 917 | * |
| 918 | * Called to destroy the phy. |
| 919 | */ |
| 920 | void phy_destroy(struct phy *phy) |
| 921 | { |
| 922 | pm_runtime_disable(&phy->dev); |
| 923 | device_unregister(&phy->dev); |
| 924 | } |
| 925 | EXPORT_SYMBOL_GPL(phy_destroy); |
| 926 | |
| 927 | /** |
| 928 | * devm_phy_destroy() - destroy the PHY |
| 929 | * @dev: device that wants to release this phy |
| 930 | * @phy: the phy returned by devm_phy_get() |
| 931 | * |
| 932 | * destroys the devres associated with this phy and invokes phy_destroy |
| 933 | * to destroy the phy. |
| 934 | */ |
| 935 | void devm_phy_destroy(struct device *dev, struct phy *phy) |
| 936 | { |
| 937 | int r; |
| 938 | |
| 939 | r = devres_destroy(dev, devm_phy_consume, devm_phy_match, phy); |
| 940 | dev_WARN_ONCE(dev, r, "couldn't find PHY resource\n"); |
| 941 | } |
| 942 | EXPORT_SYMBOL_GPL(devm_phy_destroy); |
| 943 | |
| 944 | /** |
| 945 | * __of_phy_provider_register() - create/register phy provider with the framework |
| 946 | * @dev: struct device of the phy provider |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 947 | * @children: device node containing children (if different from dev->of_node) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 948 | * @owner: the module owner containing of_xlate |
| 949 | * @of_xlate: function pointer to obtain phy instance from phy provider |
| 950 | * |
| 951 | * Creates struct phy_provider from dev and of_xlate function pointer. |
| 952 | * This is used in the case of dt boot for finding the phy instance from |
| 953 | * phy provider. |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 954 | * |
| 955 | * If the PHY provider doesn't nest children directly but uses a separate |
| 956 | * child node to contain the individual children, the @children parameter |
| 957 | * can be used to override the default. If NULL, the default (dev->of_node) |
| 958 | * will be used. If non-NULL, the device node must be a child (or further |
| 959 | * descendant) of dev->of_node. Otherwise an ERR_PTR()-encoded -EINVAL |
| 960 | * error code is returned. |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 961 | */ |
| 962 | struct phy_provider *__of_phy_provider_register(struct device *dev, |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 963 | struct device_node *children, struct module *owner, |
| 964 | struct phy * (*of_xlate)(struct device *dev, |
| 965 | struct of_phandle_args *args)) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 966 | { |
| 967 | struct phy_provider *phy_provider; |
| 968 | |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 969 | /* |
| 970 | * If specified, the device node containing the children must itself |
| 971 | * be the provider's device node or a child (or further descendant) |
| 972 | * thereof. |
| 973 | */ |
| 974 | if (children) { |
| 975 | struct device_node *parent = of_node_get(children), *next; |
| 976 | |
| 977 | while (parent) { |
| 978 | if (parent == dev->of_node) |
| 979 | break; |
| 980 | |
| 981 | next = of_get_parent(parent); |
| 982 | of_node_put(parent); |
| 983 | parent = next; |
| 984 | } |
| 985 | |
| 986 | if (!parent) |
| 987 | return ERR_PTR(-EINVAL); |
| 988 | |
| 989 | of_node_put(parent); |
| 990 | } else { |
| 991 | children = dev->of_node; |
| 992 | } |
| 993 | |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 994 | phy_provider = kzalloc(sizeof(*phy_provider), GFP_KERNEL); |
| 995 | if (!phy_provider) |
| 996 | return ERR_PTR(-ENOMEM); |
| 997 | |
| 998 | phy_provider->dev = dev; |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 999 | phy_provider->children = of_node_get(children); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 1000 | phy_provider->owner = owner; |
| 1001 | phy_provider->of_xlate = of_xlate; |
| 1002 | |
| 1003 | mutex_lock(&phy_provider_mutex); |
| 1004 | list_add_tail(&phy_provider->list, &phy_provider_list); |
| 1005 | mutex_unlock(&phy_provider_mutex); |
| 1006 | |
| 1007 | return phy_provider; |
| 1008 | } |
| 1009 | EXPORT_SYMBOL_GPL(__of_phy_provider_register); |
| 1010 | |
| 1011 | /** |
| 1012 | * __devm_of_phy_provider_register() - create/register phy provider with the |
| 1013 | * framework |
| 1014 | * @dev: struct device of the phy provider |
| 1015 | * @owner: the module owner containing of_xlate |
| 1016 | * @of_xlate: function pointer to obtain phy instance from phy provider |
| 1017 | * |
| 1018 | * Creates struct phy_provider from dev and of_xlate function pointer. |
| 1019 | * This is used in the case of dt boot for finding the phy instance from |
| 1020 | * phy provider. While at that, it also associates the device with the |
| 1021 | * phy provider using devres. On driver detach, release function is invoked |
| 1022 | * on the devres data, then, devres data is freed. |
| 1023 | */ |
| 1024 | struct phy_provider *__devm_of_phy_provider_register(struct device *dev, |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 1025 | struct device_node *children, struct module *owner, |
| 1026 | struct phy * (*of_xlate)(struct device *dev, |
| 1027 | struct of_phandle_args *args)) |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 1028 | { |
| 1029 | struct phy_provider **ptr, *phy_provider; |
| 1030 | |
| 1031 | ptr = devres_alloc(devm_phy_provider_release, sizeof(*ptr), GFP_KERNEL); |
| 1032 | if (!ptr) |
| 1033 | return ERR_PTR(-ENOMEM); |
| 1034 | |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 1035 | phy_provider = __of_phy_provider_register(dev, children, owner, |
| 1036 | of_xlate); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 1037 | if (!IS_ERR(phy_provider)) { |
| 1038 | *ptr = phy_provider; |
| 1039 | devres_add(dev, ptr); |
| 1040 | } else { |
| 1041 | devres_free(ptr); |
| 1042 | } |
| 1043 | |
| 1044 | return phy_provider; |
| 1045 | } |
| 1046 | EXPORT_SYMBOL_GPL(__devm_of_phy_provider_register); |
| 1047 | |
| 1048 | /** |
| 1049 | * of_phy_provider_unregister() - unregister phy provider from the framework |
| 1050 | * @phy_provider: phy provider returned by of_phy_provider_register() |
| 1051 | * |
| 1052 | * Removes the phy_provider created using of_phy_provider_register(). |
| 1053 | */ |
| 1054 | void of_phy_provider_unregister(struct phy_provider *phy_provider) |
| 1055 | { |
| 1056 | if (IS_ERR(phy_provider)) |
| 1057 | return; |
| 1058 | |
| 1059 | mutex_lock(&phy_provider_mutex); |
| 1060 | list_del(&phy_provider->list); |
Thierry Reding | 1140f7c | 2016-04-05 17:17:34 +0200 | [diff] [blame] | 1061 | of_node_put(phy_provider->children); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 1062 | kfree(phy_provider); |
| 1063 | mutex_unlock(&phy_provider_mutex); |
| 1064 | } |
| 1065 | EXPORT_SYMBOL_GPL(of_phy_provider_unregister); |
| 1066 | |
| 1067 | /** |
| 1068 | * devm_of_phy_provider_unregister() - remove phy provider from the framework |
| 1069 | * @dev: struct device of the phy provider |
| 1070 | * |
| 1071 | * destroys the devres associated with this phy provider and invokes |
| 1072 | * of_phy_provider_unregister to unregister the phy provider. |
| 1073 | */ |
| 1074 | void devm_of_phy_provider_unregister(struct device *dev, |
| 1075 | struct phy_provider *phy_provider) { |
| 1076 | int r; |
| 1077 | |
| 1078 | r = devres_destroy(dev, devm_phy_provider_release, devm_phy_match, |
| 1079 | phy_provider); |
| 1080 | dev_WARN_ONCE(dev, r, "couldn't find PHY provider device resource\n"); |
| 1081 | } |
| 1082 | EXPORT_SYMBOL_GPL(devm_of_phy_provider_unregister); |
| 1083 | |
| 1084 | /** |
| 1085 | * phy_release() - release the phy |
| 1086 | * @dev: the dev member within phy |
| 1087 | * |
| 1088 | * When the last reference to the device is removed, it is called |
| 1089 | * from the embedded kobject as release method. |
| 1090 | */ |
| 1091 | static void phy_release(struct device *dev) |
| 1092 | { |
| 1093 | struct phy *phy; |
| 1094 | |
| 1095 | phy = to_phy(dev); |
| 1096 | dev_vdbg(dev, "releasing '%s'\n", dev_name(dev)); |
Roger Quadros | 3be8812 | 2014-07-04 12:55:45 +0300 | [diff] [blame] | 1097 | regulator_put(phy->pwr); |
Roger Quadros | e73b49f | 2014-07-10 11:55:02 +0530 | [diff] [blame] | 1098 | ida_simple_remove(&phy_ida, phy->id); |
Kishon Vijay Abraham I | ff76496 | 2013-09-27 11:53:25 +0530 | [diff] [blame] | 1099 | kfree(phy); |
| 1100 | } |
| 1101 | |
| 1102 | static int __init phy_core_init(void) |
| 1103 | { |
| 1104 | phy_class = class_create(THIS_MODULE, "phy"); |
| 1105 | if (IS_ERR(phy_class)) { |
| 1106 | pr_err("failed to create phy class --> %ld\n", |
| 1107 | PTR_ERR(phy_class)); |
| 1108 | return PTR_ERR(phy_class); |
| 1109 | } |
| 1110 | |
| 1111 | phy_class->dev_release = phy_release; |
| 1112 | |
| 1113 | return 0; |
| 1114 | } |
Paul Gortmaker | cc013c2 | 2018-12-09 19:34:48 -0500 | [diff] [blame^] | 1115 | device_initcall(phy_core_init); |