net/dsa/legacy.c

   1 /*
   2  * net/dsa/legacy.c - Hardware switch handling
   3  * Copyright (c) 2008-2009 Marvell Semiconductor
   4  * Copyright (c) 2013 Florian Fainelli <florian@openwrt.org>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  */
  11
  12 #include <linux/device.h>
  13 #include <linux/list.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/slab.h>
  16 #include <linux/module.h>
  17 #include <linux/of.h>
  18 #include <linux/of_mdio.h>
  19 #include <linux/of_platform.h>
  20 #include <linux/of_net.h>
  21 #include <linux/netdevice.h>
  22 #include <linux/sysfs.h>
  23 #include <linux/phy_fixed.h>
  24 #include <linux/etherdevice.h>
  25
  26 #include "dsa_priv.h"
  27
  28 /* switch driver registration ***********************************************/
  29 static DEFINE_MUTEX(dsa_switch_drivers_mutex);
  30 static LIST_HEAD(dsa_switch_drivers);
  31
  32 void register_switch_driver(struct dsa_switch_driver *drv)
  33 {
  34         mutex_lock(&dsa_switch_drivers_mutex);
  35         list_add_tail(&drv->list, &dsa_switch_drivers);
  36         mutex_unlock(&dsa_switch_drivers_mutex);
  37 }
  38 EXPORT_SYMBOL_GPL(register_switch_driver);
  39
  40 void unregister_switch_driver(struct dsa_switch_driver *drv)
  41 {
  42         mutex_lock(&dsa_switch_drivers_mutex);
  43         list_del_init(&drv->list);
  44         mutex_unlock(&dsa_switch_drivers_mutex);
  45 }
  46 EXPORT_SYMBOL_GPL(unregister_switch_driver);
  47
  48 static const struct dsa_switch_ops *
  49 dsa_switch_probe(struct device *parent, struct device *host_dev, int sw_addr,
  50                  const char **_name, void **priv)
  51 {
  52         const struct dsa_switch_ops *ret;
  53         struct list_head *list;
  54         const char *name;
  55
  56         ret = NULL;
  57         name = NULL;
  58
  59         mutex_lock(&dsa_switch_drivers_mutex);
  60         list_for_each(list, &dsa_switch_drivers) {
  61                 const struct dsa_switch_ops *ops;
  62                 struct dsa_switch_driver *drv;
  63
  64                 drv = list_entry(list, struct dsa_switch_driver, list);
  65                 ops = drv->ops;
  66
  67                 name = ops->probe(parent, host_dev, sw_addr, priv);
  68                 if (name != NULL) {
  69                         ret = ops;
  70                         break;
  71                 }
  72         }
  73         mutex_unlock(&dsa_switch_drivers_mutex);
  74
  75         *_name = name;
  76
  77         return ret;
  78 }
  79
  80 /* basic switch operations **************************************************/
  81 static int dsa_cpu_dsa_setups(struct dsa_switch *ds)
  82 {
  83         int ret, port;
  84
  85         for (port = 0; port < ds->num_ports; port++) {
  86                 if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
  87                         continue;
  88
  89                 ret = dsa_port_link_register_of(&ds->ports[port]);
  90                 if (ret)
  91                         return ret;
  92         }
  93         return 0;
  94 }
  95
  96 static int dsa_switch_setup_one(struct dsa_switch *ds,
  97                                 struct net_device *master)
  98 {
  99         const struct dsa_switch_ops *ops = ds->ops;
 100         struct dsa_switch_tree *dst = ds->dst;
 101         struct dsa_chip_data *cd = ds->cd;
 102         bool valid_name_found = false;
 103         int index = ds->index;
 104         struct dsa_port *dp;
 105         int i, ret;
 106
 107         /*
 108          * Validate supplied switch configuration.
 109          */
 110         for (i = 0; i < ds->num_ports; i++) {
 111                 char *name;
 112
 113                 dp = &ds->ports[i];
 114
 115                 name = cd->port_names[i];
 116                 if (name == NULL)
 117                         continue;
 118                 dp->name = name;
 119
 120                 if (!strcmp(name, "cpu")) {
 121                         if (dst->cpu_dp) {
 122                                 netdev_err(master,
 123                                            "multiple cpu ports?!\n");
 124                                 return -EINVAL;
 125                         }
 126                         dst->cpu_dp = &ds->ports[i];
 127                         dst->cpu_dp->master = master;
 128                         dp->type = DSA_PORT_TYPE_CPU;
 129                 } else if (!strcmp(name, "dsa")) {
 130                         dp->type = DSA_PORT_TYPE_DSA;
 131                 } else {
 132                         dp->type = DSA_PORT_TYPE_USER;
 133                 }
 134                 valid_name_found = true;
 135         }
 136
 137         if (!valid_name_found && i == ds->num_ports)
 138                 return -EINVAL;
 139
 140         /* Make the built-in MII bus mask match the number of ports,
 141          * switch drivers can override this later
 142          */
 143         ds->phys_mii_mask |= dsa_user_ports(ds);
 144
 145         /*
 146          * If the CPU connects to this switch, set the switch tree
 147          * tagging protocol to the preferred tagging format of this
 148          * switch.
 149          */
 150         if (dst->cpu_dp->ds == ds) {
 151                 const struct dsa_device_ops *tag_ops;
 152                 enum dsa_tag_protocol tag_protocol;
 153
 154                 tag_protocol = ops->get_tag_protocol(ds, dst->cpu_dp->index);
 155                 tag_ops = dsa_tag_driver_get(tag_protocol);
 156                 if (IS_ERR(tag_ops))
 157                         return PTR_ERR(tag_ops);
 158
 159                 dst->cpu_dp->tag_ops = tag_ops;
 160
 161                 /* Few copies for faster access in master receive hot path */
 162                 dst->cpu_dp->rcv = dst->cpu_dp->tag_ops->rcv;
 163                 dst->cpu_dp->dst = dst;
 164         }
 165
 166         dsa_tag_driver_put(dst->cpu_dp->tag_ops);
 167
 168         memcpy(ds->rtable, cd->rtable, sizeof(ds->rtable));
 169
 170         /*
 171          * Do basic register setup.
 172          */
 173         ret = ops->setup(ds);
 174         if (ret < 0)
 175                 return ret;
 176
 177         ret = dsa_switch_register_notifier(ds);
 178         if (ret)
 179                 return ret;
 180
 181         if (!ds->slave_mii_bus && ops->phy_read) {
 182                 ds->slave_mii_bus = devm_mdiobus_alloc(ds->dev);
 183                 if (!ds->slave_mii_bus)
 184                         return -ENOMEM;
 185                 dsa_slave_mii_bus_init(ds);
 186
 187                 ret = mdiobus_register(ds->slave_mii_bus);
 188                 if (ret < 0)
 189                         return ret;
 190         }
 191
 192         /*
 193          * Create network devices for physical switch ports.
 194          */
 195         for (i = 0; i < ds->num_ports; i++) {
 196                 ds->ports[i].dn = cd->port_dn[i];
 197                 ds->ports[i].cpu_dp = dst->cpu_dp;
 198
 199                 if (!dsa_is_user_port(ds, i))
 200                         continue;
 201
 202                 ret = dsa_slave_create(&ds->ports[i]);
 203                 if (ret < 0)
 204                         netdev_err(master, "[%d]: can't create dsa slave device for port %d(%s): %d\n",
 205                                    index, i, cd->port_names[i], ret);
 206         }
 207
 208         /* Perform configuration of the CPU and DSA ports */
 209         ret = dsa_cpu_dsa_setups(ds);
 210         if (ret < 0)
 211                 netdev_err(master, "[%d] : can't configure CPU and DSA ports\n",
 212                            index);
 213
 214         return 0;
 215 }
 216
 217 static struct dsa_switch *
 218 dsa_switch_setup(struct dsa_switch_tree *dst, struct net_device *master,
 219                  int index, struct device *parent, struct device *host_dev)
 220 {
 221         struct dsa_chip_data *cd = dst->pd->chip + index;
 222         const struct dsa_switch_ops *ops;
 223         struct dsa_switch *ds;
 224         int ret;
 225         const char *name;
 226         void *priv;
 227
 228         /*
 229          * Probe for switch model.
 230          */
 231         ops = dsa_switch_probe(parent, host_dev, cd->sw_addr, &name, &priv);
 232         if (!ops) {
 233                 netdev_err(master, "[%d]: could not detect attached switch\n",
 234                            index);
 235                 return ERR_PTR(-EINVAL);
 236         }
 237         netdev_info(master, "[%d]: detected a %s switch\n",
 238                     index, name);
 239
 240
 241         /*
 242          * Allocate and initialise switch state.
 243          */
 244         ds = dsa_switch_alloc(parent, DSA_MAX_PORTS);
 245         if (!ds)
 246                 return ERR_PTR(-ENOMEM);
 247
 248         ds->dst = dst;
 249         ds->index = index;
 250         ds->cd = cd;
 251         ds->ops = ops;
 252         ds->priv = priv;
 253
 254         ret = dsa_switch_setup_one(ds, master);
 255         if (ret)
 256                 return ERR_PTR(ret);
 257
 258         return ds;
 259 }
 260
 261 static void dsa_switch_destroy(struct dsa_switch *ds)
 262 {
 263         int port;
 264
 265         /* Destroy network devices for physical switch ports. */
 266         for (port = 0; port < ds->num_ports; port++) {
 267                 if (!dsa_is_user_port(ds, port))
 268                         continue;
 269
 270                 if (!ds->ports[port].slave)
 271                         continue;
 272
 273                 dsa_slave_destroy(ds->ports[port].slave);
 274         }
 275
 276         /* Disable configuration of the CPU and DSA ports */
 277         for (port = 0; port < ds->num_ports; port++) {
 278                 if (!(dsa_is_cpu_port(ds, port) || dsa_is_dsa_port(ds, port)))
 279                         continue;
 280                 dsa_port_link_unregister_of(&ds->ports[port]);
 281         }
 282
 283         if (ds->slave_mii_bus && ds->ops->phy_read)
 284                 mdiobus_unregister(ds->slave_mii_bus);
 285
 286         dsa_switch_unregister_notifier(ds);
 287 }
 288
 289 /* platform driver init and cleanup *****************************************/
 290 static int dev_is_class(struct device *dev, void *class)
 291 {
 292         if (dev->class != NULL && !strcmp(dev->class->name, class))
 293                 return 1;
 294
 295         return 0;
 296 }
 297
 298 static struct device *dev_find_class(struct device *parent, char *class)
 299 {
 300         if (dev_is_class(parent, class)) {
 301                 get_device(parent);
 302                 return parent;
 303         }
 304
 305         return device_find_child(parent, class, dev_is_class);
 306 }
 307
 308 struct mii_bus *dsa_host_dev_to_mii_bus(struct device *dev)
 309 {
 310         struct device *d;
 311
 312         d = dev_find_class(dev, "mdio_bus");
 313         if (d != NULL) {
 314                 struct mii_bus *bus;
 315
 316                 bus = to_mii_bus(d);
 317                 put_device(d);
 318
 319                 return bus;
 320         }
 321
 322         return NULL;
 323 }
 324 EXPORT_SYMBOL_GPL(dsa_host_dev_to_mii_bus);
 325
 326 #ifdef CONFIG_OF
 327 static int dsa_of_setup_routing_table(struct dsa_platform_data *pd,
 328                                         struct dsa_chip_data *cd,
 329                                         int chip_index, int port_index,
 330                                         struct device_node *link)
 331 {
 332         const __be32 *reg;
 333         int link_sw_addr;
 334         struct device_node *parent_sw;
 335         int len;
 336
 337         parent_sw = of_get_parent(link);
 338         if (!parent_sw)
 339                 return -EINVAL;
 340
 341         reg = of_get_property(parent_sw, "reg", &len);
 342         if (!reg || (len != sizeof(*reg) * 2))
 343                 return -EINVAL;
 344
 345         /*
 346          * Get the destination switch number from the second field of its 'reg'
 347          * property, i.e. for "reg = <0x19 1>" sw_addr is '1'.
 348          */
 349         link_sw_addr = be32_to_cpup(reg + 1);
 350
 351         if (link_sw_addr >= pd->nr_chips)
 352                 return -EINVAL;
 353
 354         cd->rtable[link_sw_addr] = port_index;
 355
 356         return 0;
 357 }
 358
 359 static int dsa_of_probe_links(struct dsa_platform_data *pd,
 360                               struct dsa_chip_data *cd,
 361                               int chip_index, int port_index,
 362                               struct device_node *port,
 363                               const char *port_name)
 364 {
 365         struct device_node *link;
 366         int link_index;
 367         int ret;
 368
 369         for (link_index = 0;; link_index++) {
 370                 link = of_parse_phandle(port, "link", link_index);
 371                 if (!link)
 372                         break;
 373
 374                 if (!strcmp(port_name, "dsa") && pd->nr_chips > 1) {
 375                         ret = dsa_of_setup_routing_table(pd, cd, chip_index,
 376                                                          port_index, link);
 377                         if (ret)
 378                                 return ret;
 379                 }
 380         }
 381         return 0;
 382 }
 383
 384 static void dsa_of_free_platform_data(struct dsa_platform_data *pd)
 385 {
 386         int i;
 387         int port_index;
 388
 389         for (i = 0; i < pd->nr_chips; i++) {
 390                 port_index = 0;
 391                 while (port_index < DSA_MAX_PORTS) {
 392                         kfree(pd->chip[i].port_names[port_index]);
 393                         port_index++;
 394                 }
 395
 396                 /* Drop our reference to the MDIO bus device */
 397                 put_device(pd->chip[i].host_dev);
 398         }
 399         kfree(pd->chip);
 400 }
 401
 402 static int dsa_of_probe(struct device *dev)
 403 {
 404         struct device_node *np = dev->of_node;
 405         struct device_node *child, *mdio, *ethernet, *port;
 406         struct mii_bus *mdio_bus, *mdio_bus_switch;
 407         struct net_device *ethernet_dev;
 408         struct dsa_platform_data *pd;
 409         struct dsa_chip_data *cd;
 410         const char *port_name;
 411         int chip_index, port_index;
 412         const unsigned int *sw_addr, *port_reg;
 413         u32 eeprom_len;
 414         int ret;
 415
 416         mdio = of_parse_phandle(np, "dsa,mii-bus", 0);
 417         if (!mdio)
 418                 return -EINVAL;
 419
 420         mdio_bus = of_mdio_find_bus(mdio);
 421         if (!mdio_bus)
 422                 return -EPROBE_DEFER;
 423
 424         ethernet = of_parse_phandle(np, "dsa,ethernet", 0);
 425         if (!ethernet) {
 426                 ret = -EINVAL;
 427                 goto out_put_mdio;
 428         }
 429
 430         ethernet_dev = of_find_net_device_by_node(ethernet);
 431         if (!ethernet_dev) {
 432                 ret = -EPROBE_DEFER;
 433                 goto out_put_mdio;
 434         }
 435
 436         pd = kzalloc(sizeof(*pd), GFP_KERNEL);
 437         if (!pd) {
 438                 ret = -ENOMEM;
 439                 goto out_put_ethernet;
 440         }
 441
 442         dev->platform_data = pd;
 443         pd->of_netdev = ethernet_dev;
 444         pd->nr_chips = of_get_available_child_count(np);
 445         if (pd->nr_chips > DSA_MAX_SWITCHES)
 446                 pd->nr_chips = DSA_MAX_SWITCHES;
 447
 448         pd->chip = kcalloc(pd->nr_chips, sizeof(struct dsa_chip_data),
 449                            GFP_KERNEL);
 450         if (!pd->chip) {
 451                 ret = -ENOMEM;
 452                 goto out_free;
 453         }
 454
 455         chip_index = -1;
 456         for_each_available_child_of_node(np, child) {
 457                 int i;
 458
 459                 chip_index++;
 460                 cd = &pd->chip[chip_index];
 461
 462                 cd->of_node = child;
 463
 464                 /* Initialize the routing table */
 465                 for (i = 0; i < DSA_MAX_SWITCHES; ++i)
 466                         cd->rtable[i] = DSA_RTABLE_NONE;
 467
 468                 /* When assigning the host device, increment its refcount */
 469                 cd->host_dev = get_device(&mdio_bus->dev);
 470
 471                 sw_addr = of_get_property(child, "reg", NULL);
 472                 if (!sw_addr)
 473                         continue;
 474
 475                 cd->sw_addr = be32_to_cpup(sw_addr);
 476                 if (cd->sw_addr >= PHY_MAX_ADDR)
 477                         continue;
 478
 479                 if (!of_property_read_u32(child, "eeprom-length", &eeprom_len))
 480                         cd->eeprom_len = eeprom_len;
 481
 482                 mdio = of_parse_phandle(child, "mii-bus", 0);
 483                 if (mdio) {
 484                         mdio_bus_switch = of_mdio_find_bus(mdio);
 485                         if (!mdio_bus_switch) {
 486                                 ret = -EPROBE_DEFER;
 487                                 goto out_free_chip;
 488                         }
 489
 490                         /* Drop the mdio_bus device ref, replacing the host
 491                          * device with the mdio_bus_switch device, keeping
 492                          * the refcount from of_mdio_find_bus() above.
 493                          */
 494                         put_device(cd->host_dev);
 495                         cd->host_dev = &mdio_bus_switch->dev;
 496                 }
 497
 498                 for_each_available_child_of_node(child, port) {
 499                         port_reg = of_get_property(port, "reg", NULL);
 500                         if (!port_reg)
 501                                 continue;
 502
 503                         port_index = be32_to_cpup(port_reg);
 504                         if (port_index >= DSA_MAX_PORTS)
 505                                 break;
 506
 507                         port_name = of_get_property(port, "label", NULL);
 508                         if (!port_name)
 509                                 continue;
 510
 511                         cd->port_dn[port_index] = port;
 512
 513                         cd->port_names[port_index] = kstrdup(port_name,
 514                                         GFP_KERNEL);
 515                         if (!cd->port_names[port_index]) {
 516                                 ret = -ENOMEM;
 517                                 goto out_free_chip;
 518                         }
 519
 520                         ret = dsa_of_probe_links(pd, cd, chip_index,
 521                                                  port_index, port, port_name);
 522                         if (ret)
 523                                 goto out_free_chip;
 524
 525                 }
 526         }
 527
 528         /* The individual chips hold their own refcount on the mdio bus,
 529          * so drop ours */
 530         put_device(&mdio_bus->dev);
 531
 532         return 0;
 533
 534 out_free_chip:
 535         dsa_of_free_platform_data(pd);
 536 out_free:
 537         kfree(pd);
 538         dev->platform_data = NULL;
 539 out_put_ethernet:
 540         put_device(&ethernet_dev->dev);
 541 out_put_mdio:
 542         put_device(&mdio_bus->dev);
 543         return ret;
 544 }
 545
 546 static void dsa_of_remove(struct device *dev)
 547 {
 548         struct dsa_platform_data *pd = dev->platform_data;
 549
 550         if (!dev->of_node)
 551                 return;
 552
 553         dsa_of_free_platform_data(pd);
 554         put_device(&pd->of_netdev->dev);
 555         kfree(pd);
 556 }
 557 #else
 558 static inline int dsa_of_probe(struct device *dev)
 559 {
 560         return 0;
 561 }
 562
 563 static inline void dsa_of_remove(struct device *dev)
 564 {
 565 }
 566 #endif
 567
 568 static int dsa_setup_dst(struct dsa_switch_tree *dst, struct net_device *dev,
 569                          struct device *parent, struct dsa_platform_data *pd)
 570 {
 571         int i;
 572         unsigned configured = 0;
 573
 574         dst->pd = pd;
 575
 576         for (i = 0; i < pd->nr_chips; i++) {
 577                 struct dsa_switch *ds;
 578
 579                 ds = dsa_switch_setup(dst, dev, i, parent, pd->chip[i].host_dev);
 580                 if (IS_ERR(ds)) {
 581                         netdev_err(dev, "[%d]: couldn't create dsa switch instance (error %ld)\n",
 582                                    i, PTR_ERR(ds));
 583                         continue;
 584                 }
 585
 586                 dst->ds[i] = ds;
 587
 588                 ++configured;
 589         }
 590
 591         /*
 592          * If no switch was found, exit cleanly
 593          */
 594         if (!configured)
 595                 return -EPROBE_DEFER;
 596
 597         return dsa_master_setup(dst->cpu_dp->master, dst->cpu_dp);
 598 }
 599
 600 static int dsa_probe(struct platform_device *pdev)
 601 {
 602         struct dsa_platform_data *pd = pdev->dev.platform_data;
 603         struct net_device *dev;
 604         struct dsa_switch_tree *dst;
 605         int ret;
 606
 607         if (pdev->dev.of_node) {
 608                 ret = dsa_of_probe(&pdev->dev);
 609                 if (ret)
 610                         return ret;
 611
 612                 pd = pdev->dev.platform_data;
 613         }
 614
 615         if (pd == NULL || (pd->netdev == NULL && pd->of_netdev == NULL))
 616                 return -EINVAL;
 617
 618         if (pd->of_netdev) {
 619                 dev = pd->of_netdev;
 620                 dev_hold(dev);
 621         } else {
 622                 dev = dsa_dev_to_net_device(pd->netdev);
 623         }
 624         if (dev == NULL) {
 625                 ret = -EPROBE_DEFER;
 626                 goto out;
 627         }
 628
 629         if (dev->dsa_ptr != NULL) {
 630                 dev_put(dev);
 631                 ret = -EEXIST;
 632                 goto out;
 633         }
 634
 635         dst = devm_kzalloc(&pdev->dev, sizeof(*dst), GFP_KERNEL);
 636         if (dst == NULL) {
 637                 dev_put(dev);
 638                 ret = -ENOMEM;
 639                 goto out;
 640         }
 641
 642         platform_set_drvdata(pdev, dst);
 643
 644         ret = dsa_setup_dst(dst, dev, &pdev->dev, pd);
 645         if (ret) {
 646                 dev_put(dev);
 647                 goto out;
 648         }
 649
 650         return 0;
 651
 652 out:
 653         dsa_of_remove(&pdev->dev);
 654
 655         return ret;
 656 }
 657
 658 static void dsa_remove_dst(struct dsa_switch_tree *dst)
 659 {
 660         int i;
 661
 662         dsa_master_teardown(dst->cpu_dp->master);
 663
 664         for (i = 0; i < dst->pd->nr_chips; i++) {
 665                 struct dsa_switch *ds = dst->ds[i];
 666
 667                 if (ds)
 668                         dsa_switch_destroy(ds);
 669         }
 670
 671         dev_put(dst->cpu_dp->master);
 672 }
 673
 674 static int dsa_remove(struct platform_device *pdev)
 675 {
 676         struct dsa_switch_tree *dst = platform_get_drvdata(pdev);
 677
 678         dsa_remove_dst(dst);
 679         dsa_of_remove(&pdev->dev);
 680
 681         return 0;
 682 }
 683
 684 static void dsa_shutdown(struct platform_device *pdev)
 685 {
 686 }
 687
 688 #ifdef CONFIG_PM_SLEEP
 689 static int dsa_suspend(struct device *d)
 690 {
 691         struct dsa_switch_tree *dst = dev_get_drvdata(d);
 692         int i, ret = 0;
 693
 694         for (i = 0; i < dst->pd->nr_chips; i++) {
 695                 struct dsa_switch *ds = dst->ds[i];
 696
 697                 if (ds != NULL)
 698                         ret = dsa_switch_suspend(ds);
 699         }
 700
 701         return ret;
 702 }
 703
 704 static int dsa_resume(struct device *d)
 705 {
 706         struct dsa_switch_tree *dst = dev_get_drvdata(d);
 707         int i, ret = 0;
 708
 709         for (i = 0; i < dst->pd->nr_chips; i++) {
 710                 struct dsa_switch *ds = dst->ds[i];
 711
 712                 if (ds != NULL)
 713                         ret = dsa_switch_resume(ds);
 714         }
 715
 716         return ret;
 717 }
 718 #endif
 719
 720 static SIMPLE_DEV_PM_OPS(dsa_pm_ops, dsa_suspend, dsa_resume);
 721
 722 static const struct of_device_id dsa_of_match_table[] = {
 723         { .compatible = "marvell,dsa", },
 724         {}
 725 };
 726 MODULE_DEVICE_TABLE(of, dsa_of_match_table);
 727
 728 static struct platform_driver dsa_driver = {
 729         .probe          = dsa_probe,
 730         .remove         = dsa_remove,
 731         .shutdown       = dsa_shutdown,
 732         .driver = {
 733                 .name   = "dsa",
 734                 .of_match_table = dsa_of_match_table,
 735                 .pm     = &dsa_pm_ops,
 736         },
 737 };
 738
 739 int dsa_legacy_register(void)
 740 {
 741         return platform_driver_register(&dsa_driver);
 742 }
 743
 744 void dsa_legacy_unregister(void)
 745 {
 746         platform_driver_unregister(&dsa_driver);
 747 }