drivers/platform/x86/silead_dmi.c

   1 /*
   2  * Silead touchscreen driver DMI based configuration code
   3  *
   4  * Copyright (c) 2017 Red Hat Inc.
   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  * Red Hat authors:
  12  * Hans de Goede <[email protected]>
  13  */
  14
  15 #include <linux/acpi.h>
  16 #include <linux/device.h>
  17 #include <linux/dmi.h>
  18 #include <linux/i2c.h>
  19 #include <linux/notifier.h>
  20 #include <linux/property.h>
  21 #include <linux/string.h>
  22
  23 struct silead_ts_dmi_data {
  24         const char *acpi_name;
  25         const struct property_entry *properties;
  26 };
  27
  28 static const struct property_entry cube_iwork8_air_props[] = {
  29         PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
  30         PROPERTY_ENTRY_U32("touchscreen-size-y", 900),
  31         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  32         PROPERTY_ENTRY_STRING("firmware-name", "gsl3670-cube-iwork8-air.fw"),
  33         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  34         { }
  35 };
  36
  37 static const struct silead_ts_dmi_data cube_iwork8_air_data = {
  38         .acpi_name      = "MSSL1680:00",
  39         .properties     = cube_iwork8_air_props,
  40 };
  41
  42 static const struct property_entry jumper_ezpad_mini3_props[] = {
  43         PROPERTY_ENTRY_U32("touchscreen-size-x", 1700),
  44         PROPERTY_ENTRY_U32("touchscreen-size-y", 1150),
  45         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  46         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-jumper-ezpad-mini3.fw"),
  47         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  48         { }
  49 };
  50
  51 static const struct silead_ts_dmi_data jumper_ezpad_mini3_data = {
  52         .acpi_name      = "MSSL1680:00",
  53         .properties     = jumper_ezpad_mini3_props,
  54 };
  55
  56 static const struct property_entry dexp_ursus_7w_props[] = {
  57         PROPERTY_ENTRY_U32("touchscreen-size-x", 890),
  58         PROPERTY_ENTRY_U32("touchscreen-size-y", 630),
  59         PROPERTY_ENTRY_STRING("firmware-name", "gsl1686-dexp-ursus-7w.fw"),
  60         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  61         PROPERTY_ENTRY_BOOL("silead,home-button"),
  62         { }
  63 };
  64
  65 static const struct silead_ts_dmi_data dexp_ursus_7w_data = {
  66         .acpi_name      = "MSSL1680:00",
  67         .properties     = dexp_ursus_7w_props,
  68 };
  69
  70 static const struct property_entry surftab_twin_10_1_st10432_8_props[] = {
  71         PROPERTY_ENTRY_U32("touchscreen-size-x", 1900),
  72         PROPERTY_ENTRY_U32("touchscreen-size-y", 1280),
  73         PROPERTY_ENTRY_U32("touchscreen-inverted-y", 1),
  74         PROPERTY_ENTRY_STRING("firmware-name",
  75                               "gsl3670-surftab-twin-10-1-st10432-8.fw"),
  76         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  77         { }
  78 };
  79
  80 static const struct silead_ts_dmi_data surftab_twin_10_1_st10432_8_data = {
  81         .acpi_name      = "MSSL1680:00",
  82         .properties     = surftab_twin_10_1_st10432_8_props,
  83 };
  84
  85 static const struct property_entry surftab_wintron70_st70416_6_props[] = {
  86         PROPERTY_ENTRY_U32("touchscreen-size-x", 884),
  87         PROPERTY_ENTRY_U32("touchscreen-size-y", 632),
  88         PROPERTY_ENTRY_STRING("firmware-name",
  89                               "gsl1686-surftab-wintron70-st70416-6.fw"),
  90         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  91         PROPERTY_ENTRY_BOOL("silead,home-button"),
  92         { }
  93 };
  94
  95 static const struct silead_ts_dmi_data surftab_wintron70_st70416_6_data = {
  96         .acpi_name      = "MSSL1680:00",
  97         .properties     = surftab_wintron70_st70416_6_props,
  98 };
  99
 100 static const struct property_entry gp_electronic_t701_props[] = {
 101         PROPERTY_ENTRY_U32("touchscreen-size-x", 960),
 102         PROPERTY_ENTRY_U32("touchscreen-size-y", 640),
 103         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 104         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 105         PROPERTY_ENTRY_STRING("firmware-name",
 106                               "gsl1680-gp-electronic-t701.fw"),
 107         { }
 108 };
 109
 110 static const struct silead_ts_dmi_data gp_electronic_t701_data = {
 111         .acpi_name      = "MSSL1680:00",
 112         .properties     = gp_electronic_t701_props,
 113 };
 114
 115 static const struct property_entry pipo_w2s_props[] = {
 116         PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
 117         PROPERTY_ENTRY_U32("touchscreen-size-y", 880),
 118         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 119         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 120         PROPERTY_ENTRY_STRING("firmware-name",
 121                               "gsl1680-pipo-w2s.fw"),
 122         { }
 123 };
 124
 125 static const struct silead_ts_dmi_data pipo_w2s_data = {
 126         .acpi_name      = "MSSL1680:00",
 127         .properties     = pipo_w2s_props,
 128 };
 129
 130 static const struct property_entry pov_mobii_wintab_p800w_props[] = {
 131         PROPERTY_ENTRY_U32("touchscreen-size-x", 1800),
 132         PROPERTY_ENTRY_U32("touchscreen-size-y", 1150),
 133         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 134         PROPERTY_ENTRY_STRING("firmware-name",
 135                               "gsl3692-pov-mobii-wintab-p800w.fw"),
 136         PROPERTY_ENTRY_BOOL("silead,home-button"),
 137         { }
 138 };
 139
 140 static const struct silead_ts_dmi_data pov_mobii_wintab_p800w_data = {
 141         .acpi_name      = "MSSL1680:00",
 142         .properties     = pov_mobii_wintab_p800w_props,
 143 };
 144
 145 static const struct property_entry itworks_tw891_props[] = {
 146         PROPERTY_ENTRY_U32("touchscreen-size-x", 1600),
 147         PROPERTY_ENTRY_U32("touchscreen-size-y", 890),
 148         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 149         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 150         PROPERTY_ENTRY_STRING("firmware-name", "gsl3670-itworks-tw891.fw"),
 151         { }
 152 };
 153
 154 static const struct silead_ts_dmi_data itworks_tw891_data = {
 155         .acpi_name      = "MSSL1680:00",
 156         .properties     = itworks_tw891_props,
 157 };
 158
 159 static const struct property_entry chuwi_hi8_pro_props[] = {
 160         PROPERTY_ENTRY_U32("touchscreen-size-x", 1728),
 161         PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
 162         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 163         PROPERTY_ENTRY_STRING("firmware-name", "gsl3680-chuwi-hi8-pro.fw"),
 164         PROPERTY_ENTRY_BOOL("silead,home-button"),
 165         { }
 166 };
 167
 168 static const struct silead_ts_dmi_data chuwi_hi8_pro_data = {
 169         .acpi_name      = "MSSL1680:00",
 170         .properties     = chuwi_hi8_pro_props,
 171 };
 172
 173 static const struct property_entry digma_citi_e200_props[] = {
 174         PROPERTY_ENTRY_U32("touchscreen-size-x", 1980),
 175         PROPERTY_ENTRY_U32("touchscreen-size-y", 1500),
 176         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 177         PROPERTY_ENTRY_STRING("firmware-name",
 178                               "gsl1686-digma_citi_e200.fw"),
 179         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 180         PROPERTY_ENTRY_BOOL("silead,home-button"),
 181         { }
 182 };
 183
 184 static const struct silead_ts_dmi_data digma_citi_e200_data = {
 185         .acpi_name      = "MSSL1680:00",
 186         .properties     = digma_citi_e200_props,
 187 };
 188
 189 static const struct property_entry onda_obook_20_plus_props[] = {
 190         PROPERTY_ENTRY_U32("touchscreen-size-x", 1728),
 191         PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
 192         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 193         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 194         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 195         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-onda-obook-20-plus.fw"),
 196         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 197         PROPERTY_ENTRY_BOOL("silead,home-button"),
 198         { }
 199 };
 200
 201 static const struct silead_ts_dmi_data onda_obook_20_plus_data = {
 202         .acpi_name      = "MSSL1680:00",
 203         .properties     = onda_obook_20_plus_props,
 204 };
 205
 206 static const struct property_entry chuwi_hi8_props[] = {
 207         PROPERTY_ENTRY_U32("touchscreen-size-x", 1665),
 208         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
 209         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 210         PROPERTY_ENTRY_BOOL("silead,home-button"),
 211         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi8.fw"),
 212         { }
 213 };
 214
 215 static const struct silead_ts_dmi_data chuwi_hi8_data = {
 216         .acpi_name      = "MSSL0001:00",
 217         .properties     = chuwi_hi8_props,
 218 };
 219
 220 static const struct property_entry chuwi_vi8_props[] = {
 221         PROPERTY_ENTRY_U32("touchscreen-size-x", 1724),
 222         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
 223         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 224         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-chuwi-vi8.fw"),
 225         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 226         PROPERTY_ENTRY_BOOL("silead,home-button"),
 227         { }
 228 };
 229
 230 static const struct silead_ts_dmi_data chuwi_vi8_data = {
 231         .acpi_name      = "MSSL1680:00",
 232         .properties     = chuwi_vi8_props,
 233 };
 234
 235 static const struct property_entry trekstor_primebook_c13_props[] = {
 236         PROPERTY_ENTRY_U32("touchscreen-size-x", 2624),
 237         PROPERTY_ENTRY_U32("touchscreen-size-y", 1920),
 238         PROPERTY_ENTRY_STRING("firmware-name",
 239                               "gsl1680-trekstor-primebook-c13.fw"),
 240         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 241         PROPERTY_ENTRY_BOOL("silead,home-button"),
 242         { }
 243 };
 244
 245 static const struct silead_ts_dmi_data trekstor_primebook_c13_data = {
 246         .acpi_name      = "MSSL1680:00",
 247         .properties     = trekstor_primebook_c13_props,
 248 };
 249
 250 static const struct property_entry teclast_x98plus2_props[] = {
 251         PROPERTY_ENTRY_U32("touchscreen-size-x", 2048),
 252         PROPERTY_ENTRY_U32("touchscreen-size-y", 1280),
 253         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 254         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 255         PROPERTY_ENTRY_STRING("firmware-name",
 256                               "gsl1686-teclast_x98plus2.fw"),
 257         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 258         { }
 259 };
 260
 261 static const struct silead_ts_dmi_data teclast_x98plus2_data = {
 262         .acpi_name      = "MSSL1680:00",
 263         .properties     = teclast_x98plus2_props,
 264 };
 265
 266 static const struct property_entry teclast_x3_plus_props[] = {
 267         PROPERTY_ENTRY_U32("touchscreen-size-x", 1980),
 268         PROPERTY_ENTRY_U32("touchscreen-size-y", 1500),
 269         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-teclast-x3-plus.fw"),
 270         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 271         PROPERTY_ENTRY_BOOL("silead,home-button"),
 272         { }
 273 };
 274
 275 static const struct silead_ts_dmi_data teclast_x3_plus_data = {
 276         .acpi_name      = "MSSL1680:00",
 277         .properties     = teclast_x3_plus_props,
 278 };
 279
 280 static const struct dmi_system_id silead_ts_dmi_table[] = {
 281         {
 282                 /* CUBE iwork8 Air */
 283                 .driver_data = (void *)&cube_iwork8_air_data,
 284                 .matches = {
 285                         DMI_MATCH(DMI_SYS_VENDOR, "cube"),
 286                         DMI_MATCH(DMI_PRODUCT_NAME, "i1-TF"),
 287                         DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
 288                 },
 289         },
 290         {
 291                 /* Jumper EZpad mini3 */
 292                 .driver_data = (void *)&jumper_ezpad_mini3_data,
 293                 .matches = {
 294                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 295                         /* jumperx.T87.KFBNEEA02 with the version-nr dropped */
 296                         DMI_MATCH(DMI_BIOS_VERSION, "jumperx.T87.KFBNEEA"),
 297                 },
 298         },
 299         {
 300                 /* DEXP Ursus 7W */
 301                 .driver_data = (void *)&dexp_ursus_7w_data,
 302                 .matches = {
 303                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 304                         DMI_MATCH(DMI_PRODUCT_NAME, "7W"),
 305                 },
 306         },
 307         {
 308                 /* TrekStor SurfTab twin 10.1 ST10432-8 */
 309                 .driver_data = (void *)&surftab_twin_10_1_st10432_8_data,
 310                 .matches = {
 311                         DMI_MATCH(DMI_SYS_VENDOR, "TrekStor"),
 312                         DMI_MATCH(DMI_PRODUCT_NAME, "SurfTab twin 10.1"),
 313                 },
 314         },
 315         {
 316                 /* Trekstor Surftab Wintron 7.0 ST70416-6 */
 317                 .driver_data = (void *)&surftab_wintron70_st70416_6_data,
 318                 .matches = {
 319                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 320                         DMI_MATCH(DMI_PRODUCT_NAME, "ST70416-6"),
 321                         /* Exact match, different versions need different fw */
 322                         DMI_MATCH(DMI_BIOS_VERSION, "TREK.G.WI71C.JGBMRBA04"),
 323                 },
 324         },
 325         {
 326                 /* Trekstor Surftab Wintron 7.0 ST70416-6, newer BIOS */
 327                 .driver_data = (void *)&surftab_wintron70_st70416_6_data,
 328                 .matches = {
 329                         DMI_MATCH(DMI_SYS_VENDOR, "TrekStor"),
 330                         DMI_MATCH(DMI_PRODUCT_NAME,
 331                                              "SurfTab wintron 7.0 ST70416-6"),
 332                         /* Exact match, different versions need different fw */
 333                         DMI_MATCH(DMI_BIOS_VERSION, "TREK.G.WI71C.JGBMRBA05"),
 334                 },
 335         },
 336         {
 337                 /* Ployer Momo7w (same hardware as the Trekstor ST70416-6) */
 338                 .driver_data = (void *)&surftab_wintron70_st70416_6_data,
 339                 .matches = {
 340                         DMI_MATCH(DMI_SYS_VENDOR, "Shenzhen PLOYER"),
 341                         DMI_MATCH(DMI_PRODUCT_NAME, "MOMO7W"),
 342                         /* Exact match, different versions need different fw */
 343                         DMI_MATCH(DMI_BIOS_VERSION, "MOMO.G.WI71C.MABMRBA02"),
 344                 },
 345         },
 346         {
 347                 /* GP-electronic T701 */
 348                 .driver_data = (void *)&gp_electronic_t701_data,
 349                 .matches = {
 350                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 351                         DMI_MATCH(DMI_PRODUCT_NAME, "T701"),
 352                         DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"),
 353                 },
 354         },
 355         {
 356                 /* Pipo W2S */
 357                 .driver_data = (void *)&pipo_w2s_data,
 358                 .matches = {
 359                         DMI_MATCH(DMI_SYS_VENDOR, "PIPO"),
 360                         DMI_MATCH(DMI_PRODUCT_NAME, "W2S"),
 361                 },
 362         },
 363         {
 364                 /* Point of View mobii wintab p800w */
 365                 .driver_data = (void *)&pov_mobii_wintab_p800w_data,
 366                 .matches = {
 367                         DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
 368                         DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
 369                         DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
 370                         /* Above matches are too generic, add bios-date match */
 371                         DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
 372                 },
 373         },
 374         {
 375                 /* I.T.Works TW891 */
 376                 .driver_data = (void *)&itworks_tw891_data,
 377                 .matches = {
 378                         DMI_MATCH(DMI_SYS_VENDOR, "To be filled by O.E.M."),
 379                         DMI_MATCH(DMI_PRODUCT_NAME, "TW891"),
 380                 },
 381         },
 382         {
 383                 /* Chuwi Hi8 Pro */
 384                 .driver_data = (void *)&chuwi_hi8_pro_data,
 385                 .matches = {
 386                         DMI_MATCH(DMI_SYS_VENDOR, "Hampoo"),
 387                         DMI_MATCH(DMI_PRODUCT_NAME, "X1D3_C806N"),
 388                 },
 389         },
 390         {
 391                 /* Digma Citi E200 */
 392                 .driver_data = (void *)&digma_citi_e200_data,
 393                 .matches = {
 394                         DMI_MATCH(DMI_SYS_VENDOR, "Digma"),
 395                         DMI_MATCH(DMI_PRODUCT_NAME, "CITI E200"),
 396                         DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
 397                 },
 398         },
 399         {
 400                 /* Onda oBook 20 Plus */
 401                 .driver_data = (void *)&onda_obook_20_plus_data,
 402                 .matches = {
 403                         DMI_MATCH(DMI_SYS_VENDOR, "ONDA"),
 404                         DMI_MATCH(DMI_PRODUCT_NAME, "OBOOK 20 PLUS"),
 405                 },
 406         },
 407         {
 408                 /* Chuwi Hi8 */
 409                 .driver_data = (void *)&chuwi_hi8_data,
 410                 .matches = {
 411                         DMI_MATCH(DMI_SYS_VENDOR, "ilife"),
 412                         DMI_MATCH(DMI_PRODUCT_NAME, "S806"),
 413                 },
 414         },
 415         {
 416                 /* Chuwi Vi8 (CWI506) */
 417                 .driver_data = (void *)&chuwi_vi8_data,
 418                 .matches = {
 419                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 420                         DMI_MATCH(DMI_PRODUCT_NAME, "i86"),
 421                         DMI_MATCH(DMI_BIOS_VERSION, "CHUWI.D86JLBNR"),
 422                 },
 423         },
 424         {
 425                 /* Trekstor Primebook C13 */
 426                 .driver_data = (void *)&trekstor_primebook_c13_data,
 427                 .matches = {
 428                         DMI_MATCH(DMI_SYS_VENDOR, "TREKSTOR"),
 429                         DMI_MATCH(DMI_PRODUCT_NAME, "Primebook C13"),
 430                 },
 431         },
 432         {
 433                 /* Teclast X98 Plus II */
 434                 .driver_data = (void *)&teclast_x98plus2_data,
 435                 .matches = {
 436                         DMI_MATCH(DMI_SYS_VENDOR, "TECLAST"),
 437                         DMI_MATCH(DMI_PRODUCT_NAME, "X98 Plus II"),
 438                 },
 439         },
 440         {
 441                 /* Teclast X3 Plus */
 442                 .driver_data = (void *)&teclast_x3_plus_data,
 443                 .matches = {
 444                         DMI_MATCH(DMI_SYS_VENDOR, "TECLAST"),
 445                         DMI_MATCH(DMI_PRODUCT_NAME, "X3 Plus"),
 446                         DMI_MATCH(DMI_BOARD_NAME, "X3 Plus"),
 447                 },
 448         },
 449         {
 450                 /* I.T.Works TW701 */
 451                 .driver_data = (void *)&surftab_wintron70_st70416_6_data,
 452                 .matches = {
 453                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 454                         DMI_MATCH(DMI_PRODUCT_NAME, "i71c"),
 455                         DMI_MATCH(DMI_BIOS_VERSION, "itWORKS.G.WI71C.JGBMRB"),
 456                 },
 457         },
 458         {
 459                 /* Yours Y8W81, same case and touchscreen as Chuwi Vi8 */
 460                 .driver_data = (void *)&chuwi_vi8_data,
 461                 .matches = {
 462                         DMI_MATCH(DMI_SYS_VENDOR, "YOURS"),
 463                         DMI_MATCH(DMI_PRODUCT_NAME, "Y8W81"),
 464                 },
 465         },
 466         { },
 467 };
 468
 469 static const struct silead_ts_dmi_data *silead_ts_data;
 470
 471 static void silead_ts_dmi_add_props(struct i2c_client *client)
 472 {
 473         struct device *dev = &client->dev;
 474         int error;
 475
 476         if (has_acpi_companion(dev) &&
 477             !strncmp(silead_ts_data->acpi_name, client->name, I2C_NAME_SIZE)) {
 478                 error = device_add_properties(dev, silead_ts_data->properties);
 479                 if (error)
 480                         dev_err(dev, "failed to add properties: %d\n", error);
 481         }
 482 }
 483
 484 static int silead_ts_dmi_notifier_call(struct notifier_block *nb,
 485                                        unsigned long action, void *data)
 486 {
 487         struct device *dev = data;
 488         struct i2c_client *client;
 489
 490         switch (action) {
 491         case BUS_NOTIFY_ADD_DEVICE:
 492                 client = i2c_verify_client(dev);
 493                 if (client)
 494                         silead_ts_dmi_add_props(client);
 495                 break;
 496
 497         default:
 498                 break;
 499         }
 500
 501         return 0;
 502 }
 503
 504 static struct notifier_block silead_ts_dmi_notifier = {
 505         .notifier_call = silead_ts_dmi_notifier_call,
 506 };
 507
 508 static int __init silead_ts_dmi_init(void)
 509 {
 510         const struct dmi_system_id *dmi_id;
 511         int error;
 512
 513         dmi_id = dmi_first_match(silead_ts_dmi_table);
 514         if (!dmi_id)
 515                 return 0; /* Not an error */
 516
 517         silead_ts_data = dmi_id->driver_data;
 518
 519         error = bus_register_notifier(&i2c_bus_type, &silead_ts_dmi_notifier);
 520         if (error)
 521                 pr_err("%s: failed to register i2c bus notifier: %d\n",
 522                         __func__, error);
 523
 524         return error;
 525 }
 526
 527 /*
 528  * We are registering out notifier after i2c core is initialized and i2c bus
 529  * itself is ready (which happens at postcore initcall level), but before
 530  * ACPI starts enumerating devices (at subsys initcall level).
 531  */
 532 arch_initcall(silead_ts_dmi_init);