arch/arm/mach-omap2/devices.c

   1 /*
   2  * linux/arch/arm/mach-omap2/devices.c
   3  *
   4  * OMAP2 platform device setup/initialization
   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 #include <linux/gpio.h>
  12 #include <linux/kernel.h>
  13 #include <linux/init.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/io.h>
  16 #include <linux/clk.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/of.h>
  20 #include <linux/pinctrl/machine.h>
  21 #include <linux/platform_data/omap4-keypad.h>
  22
  23 #include <asm/mach-types.h>
  24 #include <asm/mach/map.h>
  25
  26 #include "iomap.h"
  27 #include <plat/dma.h>
  28 #include <plat/omap_hwmod.h>
  29 #include <plat/omap_device.h>
  30 #include "omap4-keypad.h"
  31
  32 #include "soc.h"
  33 #include "common.h"
  34 #include "mux.h"
  35 #include "control.h"
  36 #include "devices.h"
  37
  38 #define L3_MODULES_MAX_LEN 12
  39 #define L3_MODULES 3
  40
  41 static int __init omap3_l3_init(void)
  42 {
  43         struct omap_hwmod *oh;
  44         struct platform_device *pdev;
  45         char oh_name[L3_MODULES_MAX_LEN];
  46
  47         /*
  48          * To avoid code running on other OMAPs in
  49          * multi-omap builds
  50          */
  51         if (!(cpu_is_omap34xx()))
  52                 return -ENODEV;
  53
  54         snprintf(oh_name, L3_MODULES_MAX_LEN, "l3_main");
  55
  56         oh = omap_hwmod_lookup(oh_name);
  57
  58         if (!oh)
  59                 pr_err("could not look up %s\n", oh_name);
  60
  61         pdev = omap_device_build("omap_l3_smx", 0, oh, NULL, 0,
  62                                                            NULL, 0, 0);
  63
  64         WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
  65
  66         return IS_ERR(pdev) ? PTR_ERR(pdev) : 0;
  67 }
  68 postcore_initcall(omap3_l3_init);
  69
  70 static int __init omap4_l3_init(void)
  71 {
  72         int i;
  73         struct omap_hwmod *oh[3];
  74         struct platform_device *pdev;
  75         char oh_name[L3_MODULES_MAX_LEN];
  76
  77         /* If dtb is there, the devices will be created dynamically */
  78         if (of_have_populated_dt())
  79                 return -ENODEV;
  80
  81         /*
  82          * To avoid code running on other OMAPs in
  83          * multi-omap builds
  84          */
  85         if (!cpu_is_omap44xx() && !soc_is_omap54xx())
  86                 return -ENODEV;
  87
  88         for (i = 0; i < L3_MODULES; i++) {
  89                 snprintf(oh_name, L3_MODULES_MAX_LEN, "l3_main_%d", i+1);
  90
  91                 oh[i] = omap_hwmod_lookup(oh_name);
  92                 if (!(oh[i]))
  93                         pr_err("could not look up %s\n", oh_name);
  94         }
  95
  96         pdev = omap_device_build_ss("omap_l3_noc", 0, oh, 3, NULL,
  97                                                      0, NULL, 0, 0);
  98
  99         WARN(IS_ERR(pdev), "could not build omap_device for %s\n", oh_name);
 100
 101         return IS_ERR(pdev) ? PTR_ERR(pdev) : 0;
 102 }
 103 postcore_initcall(omap4_l3_init);
 104
 105 #if defined(CONFIG_VIDEO_OMAP2) || defined(CONFIG_VIDEO_OMAP2_MODULE)
 106
 107 static struct resource omap2cam_resources[] = {
 108         {
 109                 .start          = OMAP24XX_CAMERA_BASE,
 110                 .end            = OMAP24XX_CAMERA_BASE + 0xfff,
 111                 .flags          = IORESOURCE_MEM,
 112         },
 113         {
 114                 .start          = 24 + OMAP_INTC_START,
 115                 .flags          = IORESOURCE_IRQ,
 116         }
 117 };
 118
 119 static struct platform_device omap2cam_device = {
 120         .name           = "omap24xxcam",
 121         .id             = -1,
 122         .num_resources  = ARRAY_SIZE(omap2cam_resources),
 123         .resource       = omap2cam_resources,
 124 };
 125 #endif
 126
 127 #if defined(CONFIG_IOMMU_API)
 128
 129 #include <plat/iommu.h>
 130
 131 static struct resource omap3isp_resources[] = {
 132         {
 133                 .start          = OMAP3430_ISP_BASE,
 134                 .end            = OMAP3430_ISP_END,
 135                 .flags          = IORESOURCE_MEM,
 136         },
 137         {
 138                 .start          = OMAP3430_ISP_CCP2_BASE,
 139                 .end            = OMAP3430_ISP_CCP2_END,
 140                 .flags          = IORESOURCE_MEM,
 141         },
 142         {
 143                 .start          = OMAP3430_ISP_CCDC_BASE,
 144                 .end            = OMAP3430_ISP_CCDC_END,
 145                 .flags          = IORESOURCE_MEM,
 146         },
 147         {
 148                 .start          = OMAP3430_ISP_HIST_BASE,
 149                 .end            = OMAP3430_ISP_HIST_END,
 150                 .flags          = IORESOURCE_MEM,
 151         },
 152         {
 153                 .start          = OMAP3430_ISP_H3A_BASE,
 154                 .end            = OMAP3430_ISP_H3A_END,
 155                 .flags          = IORESOURCE_MEM,
 156         },
 157         {
 158                 .start          = OMAP3430_ISP_PREV_BASE,
 159                 .end            = OMAP3430_ISP_PREV_END,
 160                 .flags          = IORESOURCE_MEM,
 161         },
 162         {
 163                 .start          = OMAP3430_ISP_RESZ_BASE,
 164                 .end            = OMAP3430_ISP_RESZ_END,
 165                 .flags          = IORESOURCE_MEM,
 166         },
 167         {
 168                 .start          = OMAP3430_ISP_SBL_BASE,
 169                 .end            = OMAP3430_ISP_SBL_END,
 170                 .flags          = IORESOURCE_MEM,
 171         },
 172         {
 173                 .start          = OMAP3430_ISP_CSI2A_REGS1_BASE,
 174                 .end            = OMAP3430_ISP_CSI2A_REGS1_END,
 175                 .flags          = IORESOURCE_MEM,
 176         },
 177         {
 178                 .start          = OMAP3430_ISP_CSIPHY2_BASE,
 179                 .end            = OMAP3430_ISP_CSIPHY2_END,
 180                 .flags          = IORESOURCE_MEM,
 181         },
 182         {
 183                 .start          = OMAP3630_ISP_CSI2A_REGS2_BASE,
 184                 .end            = OMAP3630_ISP_CSI2A_REGS2_END,
 185                 .flags          = IORESOURCE_MEM,
 186         },
 187         {
 188                 .start          = OMAP3630_ISP_CSI2C_REGS1_BASE,
 189                 .end            = OMAP3630_ISP_CSI2C_REGS1_END,
 190                 .flags          = IORESOURCE_MEM,
 191         },
 192         {
 193                 .start          = OMAP3630_ISP_CSIPHY1_BASE,
 194                 .end            = OMAP3630_ISP_CSIPHY1_END,
 195                 .flags          = IORESOURCE_MEM,
 196         },
 197         {
 198                 .start          = OMAP3630_ISP_CSI2C_REGS2_BASE,
 199                 .end            = OMAP3630_ISP_CSI2C_REGS2_END,
 200                 .flags          = IORESOURCE_MEM,
 201         },
 202         {
 203                 .start          = 24 + OMAP_INTC_START,
 204                 .flags          = IORESOURCE_IRQ,
 205         }
 206 };
 207
 208 static struct platform_device omap3isp_device = {
 209         .name           = "omap3isp",
 210         .id             = -1,
 211         .num_resources  = ARRAY_SIZE(omap3isp_resources),
 212         .resource       = omap3isp_resources,
 213 };
 214
 215 static struct omap_iommu_arch_data omap3_isp_iommu = {
 216         .name = "isp",
 217 };
 218
 219 int omap3_init_camera(struct isp_platform_data *pdata)
 220 {
 221         omap3isp_device.dev.platform_data = pdata;
 222         omap3isp_device.dev.archdata.iommu = &omap3_isp_iommu;
 223
 224         return platform_device_register(&omap3isp_device);
 225 }
 226
 227 #else /* !CONFIG_IOMMU_API */
 228
 229 int omap3_init_camera(struct isp_platform_data *pdata)
 230 {
 231         return 0;
 232 }
 233
 234 #endif
 235
 236 static inline void omap_init_camera(void)
 237 {
 238 #if defined(CONFIG_VIDEO_OMAP2) || defined(CONFIG_VIDEO_OMAP2_MODULE)
 239         if (cpu_is_omap24xx())
 240                 platform_device_register(&omap2cam_device);
 241 #endif
 242 }
 243
 244 int __init omap4_keyboard_init(struct omap4_keypad_platform_data
 245                         *sdp4430_keypad_data, struct omap_board_data *bdata)
 246 {
 247         struct platform_device *pdev;
 248         struct omap_hwmod *oh;
 249         struct omap4_keypad_platform_data *keypad_data;
 250         unsigned int id = -1;
 251         char *oh_name = "kbd";
 252         char *name = "omap4-keypad";
 253
 254         oh = omap_hwmod_lookup(oh_name);
 255         if (!oh) {
 256                 pr_err("Could not look up %s\n", oh_name);
 257                 return -ENODEV;
 258         }
 259
 260         keypad_data = sdp4430_keypad_data;
 261
 262         pdev = omap_device_build(name, id, oh, keypad_data,
 263                         sizeof(struct omap4_keypad_platform_data), NULL, 0, 0);
 264
 265         if (IS_ERR(pdev)) {
 266                 WARN(1, "Can't build omap_device for %s:%s.\n",
 267                                                 name, oh->name);
 268                 return PTR_ERR(pdev);
 269         }
 270         oh->mux = omap_hwmod_mux_init(bdata->pads, bdata->pads_cnt);
 271
 272         return 0;
 273 }
 274
 275 #if defined(CONFIG_OMAP_MBOX_FWK) || defined(CONFIG_OMAP_MBOX_FWK_MODULE)
 276 static inline void __init omap_init_mbox(void)
 277 {
 278         struct omap_hwmod *oh;
 279         struct platform_device *pdev;
 280
 281         oh = omap_hwmod_lookup("mailbox");
 282         if (!oh) {
 283                 pr_err("%s: unable to find hwmod\n", __func__);
 284                 return;
 285         }
 286
 287         pdev = omap_device_build("omap-mailbox", -1, oh, NULL, 0, NULL, 0, 0);
 288         WARN(IS_ERR(pdev), "%s: could not build device, err %ld\n",
 289                                                 __func__, PTR_ERR(pdev));
 290 }
 291 #else
 292 static inline void omap_init_mbox(void) { }
 293 #endif /* CONFIG_OMAP_MBOX_FWK */
 294
 295 static inline void omap_init_sti(void) {}
 296
 297 #if defined(CONFIG_SND_SOC) || defined(CONFIG_SND_SOC_MODULE)
 298
 299 static struct platform_device omap_pcm = {
 300         .name   = "omap-pcm-audio",
 301         .id     = -1,
 302 };
 303
 304 static void omap_init_audio(void)
 305 {
 306         platform_device_register(&omap_pcm);
 307 }
 308
 309 #else
 310 static inline void omap_init_audio(void) {}
 311 #endif
 312
 313 #if defined(CONFIG_SND_OMAP_SOC_MCPDM) || \
 314                 defined(CONFIG_SND_OMAP_SOC_MCPDM_MODULE)
 315
 316 static void __init omap_init_mcpdm(void)
 317 {
 318         struct omap_hwmod *oh;
 319         struct platform_device *pdev;
 320
 321         oh = omap_hwmod_lookup("mcpdm");
 322         if (!oh) {
 323                 printk(KERN_ERR "Could not look up mcpdm hw_mod\n");
 324                 return;
 325         }
 326
 327         pdev = omap_device_build("omap-mcpdm", -1, oh, NULL, 0, NULL, 0, 0);
 328         WARN(IS_ERR(pdev), "Can't build omap_device for omap-mcpdm.\n");
 329 }
 330 #else
 331 static inline void omap_init_mcpdm(void) {}
 332 #endif
 333
 334 #if defined(CONFIG_SND_OMAP_SOC_DMIC) || \
 335                 defined(CONFIG_SND_OMAP_SOC_DMIC_MODULE)
 336
 337 static void __init omap_init_dmic(void)
 338 {
 339         struct omap_hwmod *oh;
 340         struct platform_device *pdev;
 341
 342         oh = omap_hwmod_lookup("dmic");
 343         if (!oh) {
 344                 pr_err("Could not look up dmic hw_mod\n");
 345                 return;
 346         }
 347
 348         pdev = omap_device_build("omap-dmic", -1, oh, NULL, 0, NULL, 0, 0);
 349         WARN(IS_ERR(pdev), "Can't build omap_device for omap-dmic.\n");
 350 }
 351 #else
 352 static inline void omap_init_dmic(void) {}
 353 #endif
 354
 355 #if defined(CONFIG_SND_OMAP_SOC_OMAP_HDMI) || \
 356                 defined(CONFIG_SND_OMAP_SOC_OMAP_HDMI_MODULE)
 357
 358 static struct platform_device omap_hdmi_audio = {
 359         .name   = "omap-hdmi-audio",
 360         .id     = -1,
 361 };
 362
 363 static void __init omap_init_hdmi_audio(void)
 364 {
 365         struct omap_hwmod *oh;
 366         struct platform_device *pdev;
 367
 368         oh = omap_hwmod_lookup("dss_hdmi");
 369         if (!oh) {
 370                 printk(KERN_ERR "Could not look up dss_hdmi hw_mod\n");
 371                 return;
 372         }
 373
 374         pdev = omap_device_build("omap-hdmi-audio-dai",
 375                 -1, oh, NULL, 0, NULL, 0, 0);
 376         WARN(IS_ERR(pdev),
 377              "Can't build omap_device for omap-hdmi-audio-dai.\n");
 378
 379         platform_device_register(&omap_hdmi_audio);
 380 }
 381 #else
 382 static inline void omap_init_hdmi_audio(void) {}
 383 #endif
 384
 385 #if defined(CONFIG_SPI_OMAP24XX) || defined(CONFIG_SPI_OMAP24XX_MODULE)
 386
 387 #include <linux/platform_data/spi-omap2-mcspi.h>
 388
 389 static int __init omap_mcspi_init(struct omap_hwmod *oh, void *unused)
 390 {
 391         struct platform_device *pdev;
 392         char *name = "omap2_mcspi";
 393         struct omap2_mcspi_platform_config *pdata;
 394         static int spi_num;
 395         struct omap2_mcspi_dev_attr *mcspi_attrib = oh->dev_attr;
 396
 397         pdata = kzalloc(sizeof(*pdata), GFP_KERNEL);
 398         if (!pdata) {
 399                 pr_err("Memory allocation for McSPI device failed\n");
 400                 return -ENOMEM;
 401         }
 402
 403         pdata->num_cs = mcspi_attrib->num_chipselect;
 404         switch (oh->class->rev) {
 405         case OMAP2_MCSPI_REV:
 406         case OMAP3_MCSPI_REV:
 407                         pdata->regs_offset = 0;
 408                         break;
 409         case OMAP4_MCSPI_REV:
 410                         pdata->regs_offset = OMAP4_MCSPI_REG_OFFSET;
 411                         break;
 412         default:
 413                         pr_err("Invalid McSPI Revision value\n");
 414                         kfree(pdata);
 415                         return -EINVAL;
 416         }
 417
 418         spi_num++;
 419         pdev = omap_device_build(name, spi_num, oh, pdata,
 420                                 sizeof(*pdata), NULL, 0, 0);
 421         WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s\n",
 422                                 name, oh->name);
 423         kfree(pdata);
 424         return 0;
 425 }
 426
 427 static void omap_init_mcspi(void)
 428 {
 429         omap_hwmod_for_each_by_class("mcspi", omap_mcspi_init, NULL);
 430 }
 431
 432 #else
 433 static inline void omap_init_mcspi(void) {}
 434 #endif
 435
 436 /**
 437  * omap_init_rng - bind the RNG hwmod to the RNG omap_device
 438  *
 439  * Bind the RNG hwmod to the RNG omap_device.  No return value.
 440  */
 441 static void omap_init_rng(void)
 442 {
 443         struct omap_hwmod *oh;
 444         struct platform_device *pdev;
 445
 446         oh = omap_hwmod_lookup("rng");
 447         if (!oh)
 448                 return;
 449
 450         pdev = omap_device_build("omap_rng", -1, oh, NULL, 0, NULL, 0, 0);
 451         WARN(IS_ERR(pdev), "Can't build omap_device for omap_rng\n");
 452 }
 453
 454 #if defined(CONFIG_CRYPTO_DEV_OMAP_SHAM) || defined(CONFIG_CRYPTO_DEV_OMAP_SHAM_MODULE)
 455
 456 #ifdef CONFIG_ARCH_OMAP2
 457 static struct resource omap2_sham_resources[] = {
 458         {
 459                 .start  = OMAP24XX_SEC_SHA1MD5_BASE,
 460                 .end    = OMAP24XX_SEC_SHA1MD5_BASE + 0x64,
 461                 .flags  = IORESOURCE_MEM,
 462         },
 463         {
 464                 .start  = 51 + OMAP_INTC_START,
 465                 .flags  = IORESOURCE_IRQ,
 466         }
 467 };
 468 static int omap2_sham_resources_sz = ARRAY_SIZE(omap2_sham_resources);
 469 #else
 470 #define omap2_sham_resources            NULL
 471 #define omap2_sham_resources_sz         0
 472 #endif
 473
 474 #ifdef CONFIG_ARCH_OMAP3
 475 static struct resource omap3_sham_resources[] = {
 476         {
 477                 .start  = OMAP34XX_SEC_SHA1MD5_BASE,
 478                 .end    = OMAP34XX_SEC_SHA1MD5_BASE + 0x64,
 479                 .flags  = IORESOURCE_MEM,
 480         },
 481         {
 482                 .start  = 49 + OMAP_INTC_START,
 483                 .flags  = IORESOURCE_IRQ,
 484         },
 485         {
 486                 .start  = OMAP34XX_DMA_SHA1MD5_RX,
 487                 .flags  = IORESOURCE_DMA,
 488         }
 489 };
 490 static int omap3_sham_resources_sz = ARRAY_SIZE(omap3_sham_resources);
 491 #else
 492 #define omap3_sham_resources            NULL
 493 #define omap3_sham_resources_sz         0
 494 #endif
 495
 496 static struct platform_device sham_device = {
 497         .name           = "omap-sham",
 498         .id             = -1,
 499 };
 500
 501 static void omap_init_sham(void)
 502 {
 503         if (cpu_is_omap24xx()) {
 504                 sham_device.resource = omap2_sham_resources;
 505                 sham_device.num_resources = omap2_sham_resources_sz;
 506         } else if (cpu_is_omap34xx()) {
 507                 sham_device.resource = omap3_sham_resources;
 508                 sham_device.num_resources = omap3_sham_resources_sz;
 509         } else {
 510                 pr_err("%s: platform not supported\n", __func__);
 511                 return;
 512         }
 513         platform_device_register(&sham_device);
 514 }
 515 #else
 516 static inline void omap_init_sham(void) { }
 517 #endif
 518
 519 #if defined(CONFIG_CRYPTO_DEV_OMAP_AES) || defined(CONFIG_CRYPTO_DEV_OMAP_AES_MODULE)
 520
 521 #ifdef CONFIG_ARCH_OMAP2
 522 static struct resource omap2_aes_resources[] = {
 523         {
 524                 .start  = OMAP24XX_SEC_AES_BASE,
 525                 .end    = OMAP24XX_SEC_AES_BASE + 0x4C,
 526                 .flags  = IORESOURCE_MEM,
 527         },
 528         {
 529                 .start  = OMAP24XX_DMA_AES_TX,
 530                 .flags  = IORESOURCE_DMA,
 531         },
 532         {
 533                 .start  = OMAP24XX_DMA_AES_RX,
 534                 .flags  = IORESOURCE_DMA,
 535         }
 536 };
 537 static int omap2_aes_resources_sz = ARRAY_SIZE(omap2_aes_resources);
 538 #else
 539 #define omap2_aes_resources             NULL
 540 #define omap2_aes_resources_sz          0
 541 #endif
 542
 543 #ifdef CONFIG_ARCH_OMAP3
 544 static struct resource omap3_aes_resources[] = {
 545         {
 546                 .start  = OMAP34XX_SEC_AES_BASE,
 547                 .end    = OMAP34XX_SEC_AES_BASE + 0x4C,
 548                 .flags  = IORESOURCE_MEM,
 549         },
 550         {
 551                 .start  = OMAP34XX_DMA_AES2_TX,
 552                 .flags  = IORESOURCE_DMA,
 553         },
 554         {
 555                 .start  = OMAP34XX_DMA_AES2_RX,
 556                 .flags  = IORESOURCE_DMA,
 557         }
 558 };
 559 static int omap3_aes_resources_sz = ARRAY_SIZE(omap3_aes_resources);
 560 #else
 561 #define omap3_aes_resources             NULL
 562 #define omap3_aes_resources_sz          0
 563 #endif
 564
 565 static struct platform_device aes_device = {
 566         .name           = "omap-aes",
 567         .id             = -1,
 568 };
 569
 570 static void omap_init_aes(void)
 571 {
 572         if (cpu_is_omap24xx()) {
 573                 aes_device.resource = omap2_aes_resources;
 574                 aes_device.num_resources = omap2_aes_resources_sz;
 575         } else if (cpu_is_omap34xx()) {
 576                 aes_device.resource = omap3_aes_resources;
 577                 aes_device.num_resources = omap3_aes_resources_sz;
 578         } else {
 579                 pr_err("%s: platform not supported\n", __func__);
 580                 return;
 581         }
 582         platform_device_register(&aes_device);
 583 }
 584
 585 #else
 586 static inline void omap_init_aes(void) { }
 587 #endif
 588
 589 /*-------------------------------------------------------------------------*/
 590
 591 #if defined(CONFIG_VIDEO_OMAP2_VOUT) || \
 592         defined(CONFIG_VIDEO_OMAP2_VOUT_MODULE)
 593 #if defined(CONFIG_FB_OMAP2) || defined(CONFIG_FB_OMAP2_MODULE)
 594 static struct resource omap_vout_resource[3 - CONFIG_FB_OMAP2_NUM_FBS] = {
 595 };
 596 #else
 597 static struct resource omap_vout_resource[2] = {
 598 };
 599 #endif
 600
 601 static struct platform_device omap_vout_device = {
 602         .name           = "omap_vout",
 603         .num_resources  = ARRAY_SIZE(omap_vout_resource),
 604         .resource       = &omap_vout_resource[0],
 605         .id             = -1,
 606 };
 607 static void omap_init_vout(void)
 608 {
 609         if (platform_device_register(&omap_vout_device) < 0)
 610                 printk(KERN_ERR "Unable to register OMAP-VOUT device\n");
 611 }
 612 #else
 613 static inline void omap_init_vout(void) {}
 614 #endif
 615
 616 /*-------------------------------------------------------------------------*/
 617
 618 static int __init omap2_init_devices(void)
 619 {
 620         /* Enable dummy states for those platforms without pinctrl support */
 621         if (!of_have_populated_dt())
 622                 pinctrl_provide_dummies();
 623
 624         /*
 625          * please keep these calls, and their implementations above,
 626          * in alphabetical order so they're easier to sort through.
 627          */
 628         omap_init_audio();
 629         omap_init_camera();
 630         omap_init_hdmi_audio();
 631         omap_init_mbox();
 632         /* If dtb is there, the devices will be created dynamically */
 633         if (!of_have_populated_dt()) {
 634                 omap_init_dmic();
 635                 omap_init_mcpdm();
 636                 omap_init_mcspi();
 637         }
 638         omap_init_sti();
 639         omap_init_rng();
 640         omap_init_sham();
 641         omap_init_aes();
 642         omap_init_vout();
 643
 644         return 0;
 645 }
 646 arch_initcall(omap2_init_devices);
 647
 648 #if defined(CONFIG_OMAP_WATCHDOG) || defined(CONFIG_OMAP_WATCHDOG_MODULE)
 649 static int __init omap_init_wdt(void)
 650 {
 651         int id = -1;
 652         struct platform_device *pdev;
 653         struct omap_hwmod *oh;
 654         char *oh_name = "wd_timer2";
 655         char *dev_name = "omap_wdt";
 656
 657         if (!cpu_class_is_omap2() || of_have_populated_dt())
 658                 return 0;
 659
 660         oh = omap_hwmod_lookup(oh_name);
 661         if (!oh) {
 662                 pr_err("Could not look up wd_timer%d hwmod\n", id);
 663                 return -EINVAL;
 664         }
 665
 666         pdev = omap_device_build(dev_name, id, oh, NULL, 0, NULL, 0, 0);
 667         WARN(IS_ERR(pdev), "Can't build omap_device for %s:%s.\n",
 668                                 dev_name, oh->name);
 669         return 0;
 670 }
 671 subsys_initcall(omap_init_wdt);
 672 #endif