drivers/platform/x86/touchscreen_dmi.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Touchscreen driver DMI based configuration code
   4  *
   5  * Copyright (c) 2017 Red Hat Inc.
   6  *
   7  * Red Hat authors:
   8  * Hans de Goede <[email protected]>
   9  */
  10
  11 #include <linux/acpi.h>
  12 #include <linux/device.h>
  13 #include <linux/dmi.h>
  14 #include <linux/i2c.h>
  15 #include <linux/notifier.h>
  16 #include <linux/property.h>
  17 #include <linux/string.h>
  18
  19 struct ts_dmi_data {
  20         const char *acpi_name;
  21         const struct property_entry *properties;
  22 };
  23
  24 /* NOTE: Please keep all entries sorted alphabetically */
  25
  26 static const struct property_entry chuwi_hi8_props[] = {
  27         PROPERTY_ENTRY_U32("touchscreen-size-x", 1665),
  28         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
  29         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  30         PROPERTY_ENTRY_BOOL("silead,home-button"),
  31         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi8.fw"),
  32         { }
  33 };
  34
  35 static const struct ts_dmi_data chuwi_hi8_data = {
  36         .acpi_name      = "MSSL0001:00",
  37         .properties     = chuwi_hi8_props,
  38 };
  39
  40 static const struct property_entry chuwi_hi8_air_props[] = {
  41         PROPERTY_ENTRY_U32("touchscreen-size-x", 1728),
  42         PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
  43         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  44         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-chuwi-hi8-air.fw"),
  45         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  46         { }
  47 };
  48
  49 static const struct ts_dmi_data chuwi_hi8_air_data = {
  50         .acpi_name      = "MSSL1680:00",
  51         .properties     = chuwi_hi8_air_props,
  52 };
  53
  54 static const struct property_entry chuwi_hi8_pro_props[] = {
  55         PROPERTY_ENTRY_U32("touchscreen-min-x", 6),
  56         PROPERTY_ENTRY_U32("touchscreen-min-y", 3),
  57         PROPERTY_ENTRY_U32("touchscreen-size-x", 1728),
  58         PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
  59         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  60         PROPERTY_ENTRY_STRING("firmware-name", "gsl3680-chuwi-hi8-pro.fw"),
  61         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  62         PROPERTY_ENTRY_BOOL("silead,home-button"),
  63         { }
  64 };
  65
  66 static const struct ts_dmi_data chuwi_hi8_pro_data = {
  67         .acpi_name      = "MSSL1680:00",
  68         .properties     = chuwi_hi8_pro_props,
  69 };
  70
  71 static const struct property_entry chuwi_hi10_air_props[] = {
  72         PROPERTY_ENTRY_U32("touchscreen-size-x", 1981),
  73         PROPERTY_ENTRY_U32("touchscreen-size-y", 1271),
  74         PROPERTY_ENTRY_U32("touchscreen-min-x", 99),
  75         PROPERTY_ENTRY_U32("touchscreen-min-y", 9),
  76         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  77         PROPERTY_ENTRY_U32("touchscreen-fuzz-x", 5),
  78         PROPERTY_ENTRY_U32("touchscreen-fuzz-y", 4),
  79         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-chuwi-hi10-air.fw"),
  80         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  81         PROPERTY_ENTRY_BOOL("silead,home-button"),
  82         { }
  83 };
  84
  85 static const struct ts_dmi_data chuwi_hi10_air_data = {
  86         .acpi_name      = "MSSL1680:00",
  87         .properties     = chuwi_hi10_air_props,
  88 };
  89
  90 static const struct property_entry chuwi_vi8_props[] = {
  91         PROPERTY_ENTRY_U32("touchscreen-min-x", 4),
  92         PROPERTY_ENTRY_U32("touchscreen-min-y", 6),
  93         PROPERTY_ENTRY_U32("touchscreen-size-x", 1724),
  94         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
  95         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
  96         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-chuwi-vi8.fw"),
  97         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
  98         PROPERTY_ENTRY_BOOL("silead,home-button"),
  99         { }
 100 };
 101
 102 static const struct ts_dmi_data chuwi_vi8_data = {
 103         .acpi_name      = "MSSL1680:00",
 104         .properties     = chuwi_vi8_props,
 105 };
 106
 107 static const struct property_entry chuwi_vi10_props[] = {
 108         PROPERTY_ENTRY_U32("touchscreen-min-x", 0),
 109         PROPERTY_ENTRY_U32("touchscreen-min-y", 4),
 110         PROPERTY_ENTRY_U32("touchscreen-size-x", 1858),
 111         PROPERTY_ENTRY_U32("touchscreen-size-y", 1280),
 112         PROPERTY_ENTRY_STRING("firmware-name", "gsl3680-chuwi-vi10.fw"),
 113         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 114         PROPERTY_ENTRY_BOOL("silead,home-button"),
 115         { }
 116 };
 117
 118 static const struct ts_dmi_data chuwi_vi10_data = {
 119         .acpi_name      = "MSSL0002:00",
 120         .properties     = chuwi_vi10_props,
 121 };
 122
 123 static const struct property_entry connect_tablet9_props[] = {
 124         PROPERTY_ENTRY_U32("touchscreen-min-x", 9),
 125         PROPERTY_ENTRY_U32("touchscreen-min-y", 10),
 126         PROPERTY_ENTRY_U32("touchscreen-size-x", 1664),
 127         PROPERTY_ENTRY_U32("touchscreen-size-y", 880),
 128         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 129         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 130         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-connect-tablet9.fw"),
 131         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 132         { }
 133 };
 134
 135 static const struct ts_dmi_data connect_tablet9_data = {
 136         .acpi_name      = "MSSL1680:00",
 137         .properties     = connect_tablet9_props,
 138 };
 139
 140 static const struct property_entry cube_iwork8_air_props[] = {
 141         PROPERTY_ENTRY_U32("touchscreen-min-x", 1),
 142         PROPERTY_ENTRY_U32("touchscreen-min-y", 3),
 143         PROPERTY_ENTRY_U32("touchscreen-size-x", 1664),
 144         PROPERTY_ENTRY_U32("touchscreen-size-y", 896),
 145         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 146         PROPERTY_ENTRY_STRING("firmware-name", "gsl3670-cube-iwork8-air.fw"),
 147         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 148         { }
 149 };
 150
 151 static const struct ts_dmi_data cube_iwork8_air_data = {
 152         .acpi_name      = "MSSL1680:00",
 153         .properties     = cube_iwork8_air_props,
 154 };
 155
 156 static const struct property_entry cube_knote_i1101_props[] = {
 157         PROPERTY_ENTRY_U32("touchscreen-min-x", 20),
 158         PROPERTY_ENTRY_U32("touchscreen-min-y",  22),
 159         PROPERTY_ENTRY_U32("touchscreen-size-x", 1961),
 160         PROPERTY_ENTRY_U32("touchscreen-size-y", 1513),
 161         PROPERTY_ENTRY_STRING("firmware-name", "gsl3692-cube-knote-i1101.fw"),
 162         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 163         PROPERTY_ENTRY_BOOL("silead,home-button"),
 164         { }
 165 };
 166
 167 static const struct ts_dmi_data cube_knote_i1101_data = {
 168         .acpi_name      = "MSSL1680:00",
 169         .properties     = cube_knote_i1101_props,
 170 };
 171
 172 static const struct property_entry dexp_ursus_7w_props[] = {
 173         PROPERTY_ENTRY_U32("touchscreen-size-x", 890),
 174         PROPERTY_ENTRY_U32("touchscreen-size-y", 630),
 175         PROPERTY_ENTRY_STRING("firmware-name", "gsl1686-dexp-ursus-7w.fw"),
 176         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 177         PROPERTY_ENTRY_BOOL("silead,home-button"),
 178         { }
 179 };
 180
 181 static const struct ts_dmi_data dexp_ursus_7w_data = {
 182         .acpi_name      = "MSSL1680:00",
 183         .properties     = dexp_ursus_7w_props,
 184 };
 185
 186 static const struct property_entry digma_citi_e200_props[] = {
 187         PROPERTY_ENTRY_U32("touchscreen-size-x", 1980),
 188         PROPERTY_ENTRY_U32("touchscreen-size-y", 1500),
 189         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 190         PROPERTY_ENTRY_STRING("firmware-name",
 191                               "gsl1686-digma_citi_e200.fw"),
 192         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 193         PROPERTY_ENTRY_BOOL("silead,home-button"),
 194         { }
 195 };
 196
 197 static const struct ts_dmi_data digma_citi_e200_data = {
 198         .acpi_name      = "MSSL1680:00",
 199         .properties     = digma_citi_e200_props,
 200 };
 201
 202 static const struct property_entry gp_electronic_t701_props[] = {
 203         PROPERTY_ENTRY_U32("touchscreen-size-x", 960),
 204         PROPERTY_ENTRY_U32("touchscreen-size-y", 640),
 205         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 206         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 207         PROPERTY_ENTRY_STRING("firmware-name",
 208                               "gsl1680-gp-electronic-t701.fw"),
 209         { }
 210 };
 211
 212 static const struct ts_dmi_data gp_electronic_t701_data = {
 213         .acpi_name      = "MSSL1680:00",
 214         .properties     = gp_electronic_t701_props,
 215 };
 216
 217 static const struct property_entry itworks_tw891_props[] = {
 218         PROPERTY_ENTRY_U32("touchscreen-min-x", 1),
 219         PROPERTY_ENTRY_U32("touchscreen-min-y", 5),
 220         PROPERTY_ENTRY_U32("touchscreen-size-x", 1600),
 221         PROPERTY_ENTRY_U32("touchscreen-size-y", 896),
 222         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 223         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 224         PROPERTY_ENTRY_STRING("firmware-name", "gsl3670-itworks-tw891.fw"),
 225         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 226         { }
 227 };
 228
 229 static const struct ts_dmi_data itworks_tw891_data = {
 230         .acpi_name      = "MSSL1680:00",
 231         .properties     = itworks_tw891_props,
 232 };
 233
 234 static const struct property_entry jumper_ezpad_6_pro_props[] = {
 235         PROPERTY_ENTRY_U32("touchscreen-size-x", 1980),
 236         PROPERTY_ENTRY_U32("touchscreen-size-y", 1500),
 237         PROPERTY_ENTRY_STRING("firmware-name", "gsl3692-jumper-ezpad-6-pro.fw"),
 238         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 239         PROPERTY_ENTRY_BOOL("silead,home-button"),
 240         { }
 241 };
 242
 243 static const struct ts_dmi_data jumper_ezpad_6_pro_data = {
 244         .acpi_name      = "MSSL1680:00",
 245         .properties     = jumper_ezpad_6_pro_props,
 246 };
 247
 248 static const struct property_entry jumper_ezpad_6_pro_b_props[] = {
 249         PROPERTY_ENTRY_U32("touchscreen-size-x", 1980),
 250         PROPERTY_ENTRY_U32("touchscreen-size-y", 1500),
 251         PROPERTY_ENTRY_STRING("firmware-name", "gsl3692-jumper-ezpad-6-pro-b.fw"),
 252         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 253         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 254         PROPERTY_ENTRY_BOOL("silead,home-button"),
 255         { }
 256 };
 257
 258 static const struct ts_dmi_data jumper_ezpad_6_pro_b_data = {
 259         .acpi_name      = "MSSL1680:00",
 260         .properties     = jumper_ezpad_6_pro_b_props,
 261 };
 262
 263 static const struct property_entry jumper_ezpad_mini3_props[] = {
 264         PROPERTY_ENTRY_U32("touchscreen-min-x", 23),
 265         PROPERTY_ENTRY_U32("touchscreen-min-y", 16),
 266         PROPERTY_ENTRY_U32("touchscreen-size-x", 1700),
 267         PROPERTY_ENTRY_U32("touchscreen-size-y", 1138),
 268         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 269         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-jumper-ezpad-mini3.fw"),
 270         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 271         { }
 272 };
 273
 274 static const struct ts_dmi_data jumper_ezpad_mini3_data = {
 275         .acpi_name      = "MSSL1680:00",
 276         .properties     = jumper_ezpad_mini3_props,
 277 };
 278
 279 static const struct property_entry myria_my8307_props[] = {
 280         PROPERTY_ENTRY_U32("touchscreen-size-x", 1720),
 281         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
 282         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 283         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 284         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 285         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-myria-my8307.fw"),
 286         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 287         PROPERTY_ENTRY_BOOL("silead,home-button"),
 288         { }
 289 };
 290
 291 static const struct ts_dmi_data myria_my8307_data = {
 292         .acpi_name      = "MSSL1680:00",
 293         .properties     = myria_my8307_props,
 294 };
 295
 296 static const struct property_entry onda_obook_20_plus_props[] = {
 297         PROPERTY_ENTRY_U32("touchscreen-size-x", 1728),
 298         PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
 299         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 300         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 301         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 302         PROPERTY_ENTRY_STRING("firmware-name", "gsl3676-onda-obook-20-plus.fw"),
 303         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 304         PROPERTY_ENTRY_BOOL("silead,home-button"),
 305         { }
 306 };
 307
 308 static const struct ts_dmi_data onda_obook_20_plus_data = {
 309         .acpi_name      = "MSSL1680:00",
 310         .properties     = onda_obook_20_plus_props,
 311 };
 312
 313 static const struct property_entry onda_v80_plus_v3_props[] = {
 314         PROPERTY_ENTRY_U32("touchscreen-min-x", 22),
 315         PROPERTY_ENTRY_U32("touchscreen-min-y", 15),
 316         PROPERTY_ENTRY_U32("touchscreen-size-x", 1698),
 317         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
 318         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 319         PROPERTY_ENTRY_STRING("firmware-name",
 320                               "gsl3676-onda-v80-plus-v3.fw"),
 321         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 322         PROPERTY_ENTRY_BOOL("silead,home-button"),
 323         { }
 324 };
 325
 326 static const struct ts_dmi_data onda_v80_plus_v3_data = {
 327         .acpi_name      = "MSSL1680:00",
 328         .properties     = onda_v80_plus_v3_props,
 329 };
 330
 331 static const struct property_entry onda_v820w_32g_props[] = {
 332         PROPERTY_ENTRY_U32("touchscreen-size-x", 1665),
 333         PROPERTY_ENTRY_U32("touchscreen-size-y", 1140),
 334         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 335         PROPERTY_ENTRY_STRING("firmware-name",
 336                               "gsl1680-onda-v820w-32g.fw"),
 337         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 338         PROPERTY_ENTRY_BOOL("silead,home-button"),
 339         { }
 340 };
 341
 342 static const struct ts_dmi_data onda_v820w_32g_data = {
 343         .acpi_name      = "MSSL1680:00",
 344         .properties     = onda_v820w_32g_props,
 345 };
 346
 347 static const struct property_entry onda_v891w_v1_props[] = {
 348         PROPERTY_ENTRY_U32("touchscreen-min-x", 46),
 349         PROPERTY_ENTRY_U32("touchscreen-min-y",  8),
 350         PROPERTY_ENTRY_U32("touchscreen-size-x", 1676),
 351         PROPERTY_ENTRY_U32("touchscreen-size-y", 1130),
 352         PROPERTY_ENTRY_STRING("firmware-name",
 353                               "gsl3680-onda-v891w-v1.fw"),
 354         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 355         PROPERTY_ENTRY_BOOL("silead,home-button"),
 356         { }
 357 };
 358
 359 static const struct ts_dmi_data onda_v891w_v1_data = {
 360         .acpi_name      = "MSSL1680:00",
 361         .properties     = onda_v891w_v1_props,
 362 };
 363
 364 static const struct property_entry onda_v891w_v3_props[] = {
 365         PROPERTY_ENTRY_U32("touchscreen-min-x", 35),
 366         PROPERTY_ENTRY_U32("touchscreen-min-y", 15),
 367         PROPERTY_ENTRY_U32("touchscreen-size-x", 1625),
 368         PROPERTY_ENTRY_U32("touchscreen-size-y", 1135),
 369         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 370         PROPERTY_ENTRY_STRING("firmware-name",
 371                               "gsl3676-onda-v891w-v3.fw"),
 372         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 373         PROPERTY_ENTRY_BOOL("silead,home-button"),
 374         { }
 375 };
 376
 377 static const struct ts_dmi_data onda_v891w_v3_data = {
 378         .acpi_name      = "MSSL1680:00",
 379         .properties     = onda_v891w_v3_props,
 380 };
 381
 382 static const struct property_entry pipo_w2s_props[] = {
 383         PROPERTY_ENTRY_U32("touchscreen-size-x", 1660),
 384         PROPERTY_ENTRY_U32("touchscreen-size-y", 880),
 385         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 386         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 387         PROPERTY_ENTRY_STRING("firmware-name",
 388                               "gsl1680-pipo-w2s.fw"),
 389         { }
 390 };
 391
 392 static const struct ts_dmi_data pipo_w2s_data = {
 393         .acpi_name      = "MSSL1680:00",
 394         .properties     = pipo_w2s_props,
 395 };
 396
 397 static const struct property_entry pov_mobii_wintab_p800w_v20_props[] = {
 398         PROPERTY_ENTRY_U32("touchscreen-min-x", 32),
 399         PROPERTY_ENTRY_U32("touchscreen-min-y", 16),
 400         PROPERTY_ENTRY_U32("touchscreen-size-x", 1692),
 401         PROPERTY_ENTRY_U32("touchscreen-size-y", 1146),
 402         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 403         PROPERTY_ENTRY_STRING("firmware-name",
 404                               "gsl3680-pov-mobii-wintab-p800w-v20.fw"),
 405         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 406         PROPERTY_ENTRY_BOOL("silead,home-button"),
 407         { }
 408 };
 409
 410 static const struct ts_dmi_data pov_mobii_wintab_p800w_v20_data = {
 411         .acpi_name      = "MSSL1680:00",
 412         .properties     = pov_mobii_wintab_p800w_v20_props,
 413 };
 414
 415 static const struct property_entry pov_mobii_wintab_p800w_v21_props[] = {
 416         PROPERTY_ENTRY_U32("touchscreen-min-x", 1),
 417         PROPERTY_ENTRY_U32("touchscreen-min-y", 8),
 418         PROPERTY_ENTRY_U32("touchscreen-size-x", 1794),
 419         PROPERTY_ENTRY_U32("touchscreen-size-y", 1148),
 420         PROPERTY_ENTRY_BOOL("touchscreen-swapped-x-y"),
 421         PROPERTY_ENTRY_STRING("firmware-name",
 422                               "gsl3692-pov-mobii-wintab-p800w.fw"),
 423         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 424         PROPERTY_ENTRY_BOOL("silead,home-button"),
 425         { }
 426 };
 427
 428 static const struct ts_dmi_data pov_mobii_wintab_p800w_v21_data = {
 429         .acpi_name      = "MSSL1680:00",
 430         .properties     = pov_mobii_wintab_p800w_v21_props,
 431 };
 432
 433 static const struct property_entry pov_mobii_wintab_p1006w_v10_props[] = {
 434         PROPERTY_ENTRY_U32("touchscreen-min-x", 1),
 435         PROPERTY_ENTRY_U32("touchscreen-min-y", 3),
 436         PROPERTY_ENTRY_U32("touchscreen-size-x", 1984),
 437         PROPERTY_ENTRY_U32("touchscreen-size-y", 1520),
 438         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 439         PROPERTY_ENTRY_STRING("firmware-name",
 440                               "gsl3692-pov-mobii-wintab-p1006w-v10.fw"),
 441         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 442         PROPERTY_ENTRY_BOOL("silead,home-button"),
 443         { }
 444 };
 445
 446 static const struct ts_dmi_data pov_mobii_wintab_p1006w_v10_data = {
 447         .acpi_name      = "MSSL1680:00",
 448         .properties     = pov_mobii_wintab_p1006w_v10_props,
 449 };
 450
 451 static const struct property_entry teclast_x3_plus_props[] = {
 452         PROPERTY_ENTRY_U32("touchscreen-size-x", 1980),
 453         PROPERTY_ENTRY_U32("touchscreen-size-y", 1500),
 454         PROPERTY_ENTRY_STRING("firmware-name", "gsl1680-teclast-x3-plus.fw"),
 455         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 456         PROPERTY_ENTRY_BOOL("silead,home-button"),
 457         { }
 458 };
 459
 460 static const struct ts_dmi_data teclast_x3_plus_data = {
 461         .acpi_name      = "MSSL1680:00",
 462         .properties     = teclast_x3_plus_props,
 463 };
 464
 465 static const struct property_entry teclast_x98plus2_props[] = {
 466         PROPERTY_ENTRY_U32("touchscreen-size-x", 2048),
 467         PROPERTY_ENTRY_U32("touchscreen-size-y", 1280),
 468         PROPERTY_ENTRY_BOOL("touchscreen-inverted-x"),
 469         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 470         PROPERTY_ENTRY_STRING("firmware-name",
 471                               "gsl1686-teclast_x98plus2.fw"),
 472         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 473         { }
 474 };
 475
 476 static const struct ts_dmi_data teclast_x98plus2_data = {
 477         .acpi_name      = "MSSL1680:00",
 478         .properties     = teclast_x98plus2_props,
 479 };
 480
 481 static const struct property_entry trekstor_primebook_c11_props[] = {
 482         PROPERTY_ENTRY_U32("touchscreen-size-x", 1970),
 483         PROPERTY_ENTRY_U32("touchscreen-size-y", 1530),
 484         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 485         PROPERTY_ENTRY_STRING("firmware-name",
 486                               "gsl1680-trekstor-primebook-c11.fw"),
 487         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 488         PROPERTY_ENTRY_BOOL("silead,home-button"),
 489         { }
 490 };
 491
 492 static const struct ts_dmi_data trekstor_primebook_c11_data = {
 493         .acpi_name      = "MSSL1680:00",
 494         .properties     = trekstor_primebook_c11_props,
 495 };
 496
 497 static const struct property_entry trekstor_primebook_c13_props[] = {
 498         PROPERTY_ENTRY_U32("touchscreen-size-x", 2624),
 499         PROPERTY_ENTRY_U32("touchscreen-size-y", 1920),
 500         PROPERTY_ENTRY_STRING("firmware-name",
 501                               "gsl1680-trekstor-primebook-c13.fw"),
 502         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 503         PROPERTY_ENTRY_BOOL("silead,home-button"),
 504         { }
 505 };
 506
 507 static const struct ts_dmi_data trekstor_primebook_c13_data = {
 508         .acpi_name      = "MSSL1680:00",
 509         .properties     = trekstor_primebook_c13_props,
 510 };
 511
 512 static const struct property_entry trekstor_primetab_t13b_props[] = {
 513         PROPERTY_ENTRY_U32("touchscreen-size-x", 2500),
 514         PROPERTY_ENTRY_U32("touchscreen-size-y", 1900),
 515         PROPERTY_ENTRY_STRING("firmware-name",
 516                               "gsl1680-trekstor-primetab-t13b.fw"),
 517         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 518         PROPERTY_ENTRY_BOOL("silead,home-button"),
 519         PROPERTY_ENTRY_BOOL("touchscreen-inverted-y"),
 520         { }
 521 };
 522
 523 static const struct ts_dmi_data trekstor_primetab_t13b_data = {
 524         .acpi_name  = "MSSL1680:00",
 525         .properties = trekstor_primetab_t13b_props,
 526 };
 527
 528 static const struct property_entry trekstor_surftab_twin_10_1_props[] = {
 529         PROPERTY_ENTRY_U32("touchscreen-size-x", 1900),
 530         PROPERTY_ENTRY_U32("touchscreen-size-y", 1280),
 531         PROPERTY_ENTRY_U32("touchscreen-inverted-y", 1),
 532         PROPERTY_ENTRY_STRING("firmware-name",
 533                               "gsl3670-surftab-twin-10-1-st10432-8.fw"),
 534         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 535         { }
 536 };
 537
 538 static const struct ts_dmi_data trekstor_surftab_twin_10_1_data = {
 539         .acpi_name      = "MSSL1680:00",
 540         .properties     = trekstor_surftab_twin_10_1_props,
 541 };
 542
 543 static const struct property_entry trekstor_surftab_wintron70_props[] = {
 544         PROPERTY_ENTRY_U32("touchscreen-min-x", 12),
 545         PROPERTY_ENTRY_U32("touchscreen-min-y", 8),
 546         PROPERTY_ENTRY_U32("touchscreen-size-x", 884),
 547         PROPERTY_ENTRY_U32("touchscreen-size-y", 632),
 548         PROPERTY_ENTRY_STRING("firmware-name",
 549                               "gsl1686-surftab-wintron70-st70416-6.fw"),
 550         PROPERTY_ENTRY_U32("silead,max-fingers", 10),
 551         PROPERTY_ENTRY_BOOL("silead,home-button"),
 552         { }
 553 };
 554
 555 static const struct ts_dmi_data trekstor_surftab_wintron70_data = {
 556         .acpi_name      = "MSSL1680:00",
 557         .properties     = trekstor_surftab_wintron70_props,
 558 };
 559
 560 /* NOTE: Please keep this table sorted alphabetically */
 561 static const struct dmi_system_id touchscreen_dmi_table[] = {
 562         {
 563                 /* Chuwi Hi8 */
 564                 .driver_data = (void *)&chuwi_hi8_data,
 565                 .matches = {
 566                         DMI_MATCH(DMI_SYS_VENDOR, "ilife"),
 567                         DMI_MATCH(DMI_PRODUCT_NAME, "S806"),
 568                 },
 569         },
 570         {
 571                 /* Chuwi Hi8 (H1D_S806_206) */
 572                 .driver_data = (void *)&chuwi_hi8_data,
 573                 .matches = {
 574                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 575                         DMI_MATCH(DMI_PRODUCT_NAME, "BayTrail"),
 576                         DMI_MATCH(DMI_BIOS_VERSION, "H1D_S806_206"),
 577                 },
 578         },
 579         {
 580                 /* Chuwi Hi8 Air (CWI543) */
 581                 .driver_data = (void *)&chuwi_hi8_air_data,
 582                 .matches = {
 583                         DMI_MATCH(DMI_BOARD_VENDOR, "Default string"),
 584                         DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
 585                         DMI_MATCH(DMI_PRODUCT_NAME, "Hi8 Air"),
 586                 },
 587         },
 588         {
 589                 /* Chuwi Hi8 Pro (CWI513) */
 590                 .driver_data = (void *)&chuwi_hi8_pro_data,
 591                 .matches = {
 592                         DMI_MATCH(DMI_SYS_VENDOR, "Hampoo"),
 593                         DMI_MATCH(DMI_PRODUCT_NAME, "X1D3_C806N"),
 594                 },
 595         },
 596         {
 597                 /* Chuwi Hi10 Air */
 598                 .driver_data = (void *)&chuwi_hi10_air_data,
 599                 .matches = {
 600                         DMI_MATCH(DMI_BOARD_VENDOR, "Hampoo"),
 601                         DMI_MATCH(DMI_PRODUCT_SKU, "P1W6_C109D_B"),
 602                 },
 603         },
 604         {
 605                 /* Chuwi Vi8 (CWI506) */
 606                 .driver_data = (void *)&chuwi_vi8_data,
 607                 .matches = {
 608                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 609                         DMI_MATCH(DMI_PRODUCT_NAME, "i86"),
 610                         DMI_MATCH(DMI_BIOS_VERSION, "CHUWI.D86JLBNR"),
 611                 },
 612         },
 613         {
 614                 /* Chuwi Vi10 (CWI505) */
 615                 .driver_data = (void *)&chuwi_vi10_data,
 616                 .matches = {
 617                         DMI_MATCH(DMI_BOARD_VENDOR, "Hampoo"),
 618                         DMI_MATCH(DMI_BOARD_NAME, "BYT-PF02"),
 619                         DMI_MATCH(DMI_SYS_VENDOR, "ilife"),
 620                         DMI_MATCH(DMI_PRODUCT_NAME, "S165"),
 621                 },
 622         },
 623         {
 624                 /* Connect Tablet 9 */
 625                 .driver_data = (void *)&connect_tablet9_data,
 626                 .matches = {
 627                         DMI_MATCH(DMI_SYS_VENDOR, "Connect"),
 628                         DMI_MATCH(DMI_PRODUCT_NAME, "Tablet 9"),
 629                 },
 630         },
 631         {
 632                 /* CUBE iwork8 Air */
 633                 .driver_data = (void *)&cube_iwork8_air_data,
 634                 .matches = {
 635                         DMI_MATCH(DMI_SYS_VENDOR, "cube"),
 636                         DMI_MATCH(DMI_PRODUCT_NAME, "i1-TF"),
 637                         DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
 638                 },
 639         },
 640         {
 641                 /* Cube KNote i1101 */
 642                 .driver_data = (void *)&cube_knote_i1101_data,
 643                 .matches = {
 644                         DMI_MATCH(DMI_BOARD_VENDOR, "Hampoo"),
 645                         DMI_MATCH(DMI_BOARD_NAME, "L1W6_I1101"),
 646                         DMI_MATCH(DMI_SYS_VENDOR, "ALLDOCUBE"),
 647                         DMI_MATCH(DMI_PRODUCT_NAME, "i1101"),
 648                 },
 649         },
 650         {
 651                 /* DEXP Ursus 7W */
 652                 .driver_data = (void *)&dexp_ursus_7w_data,
 653                 .matches = {
 654                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 655                         DMI_MATCH(DMI_PRODUCT_NAME, "7W"),
 656                 },
 657         },
 658         {
 659                 /* Digma Citi E200 */
 660                 .driver_data = (void *)&digma_citi_e200_data,
 661                 .matches = {
 662                         DMI_MATCH(DMI_SYS_VENDOR, "Digma"),
 663                         DMI_MATCH(DMI_PRODUCT_NAME, "CITI E200"),
 664                         DMI_MATCH(DMI_BOARD_NAME, "Cherry Trail CR"),
 665                 },
 666         },
 667         {
 668                 /* GP-electronic T701 */
 669                 .driver_data = (void *)&gp_electronic_t701_data,
 670                 .matches = {
 671                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 672                         DMI_MATCH(DMI_PRODUCT_NAME, "T701"),
 673                         DMI_MATCH(DMI_BIOS_VERSION, "BYT70A.YNCHENG.WIN.007"),
 674                 },
 675         },
 676         {
 677                 /* I.T.Works TW701 (same hardware as the Trekstor ST70416-6) */
 678                 .driver_data = (void *)&trekstor_surftab_wintron70_data,
 679                 .matches = {
 680                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 681                         DMI_MATCH(DMI_PRODUCT_NAME, "i71c"),
 682                         DMI_MATCH(DMI_BIOS_VERSION, "itWORKS.G.WI71C.JGBMRB"),
 683                 },
 684         },
 685         {
 686                 /* I.T.Works TW891 */
 687                 .driver_data = (void *)&itworks_tw891_data,
 688                 .matches = {
 689                         DMI_MATCH(DMI_SYS_VENDOR, "To be filled by O.E.M."),
 690                         DMI_MATCH(DMI_PRODUCT_NAME, "TW891"),
 691                 },
 692         },
 693         {
 694                 /* Jumper EZpad 6 Pro */
 695                 .driver_data = (void *)&jumper_ezpad_6_pro_data,
 696                 .matches = {
 697                         DMI_MATCH(DMI_SYS_VENDOR, "Jumper"),
 698                         DMI_MATCH(DMI_PRODUCT_NAME, "EZpad"),
 699                         DMI_MATCH(DMI_BIOS_VERSION, "5.12"),
 700                         /* Above matches are too generic, add bios-date match */
 701                         DMI_MATCH(DMI_BIOS_DATE, "08/18/2017"),
 702                 },
 703         },
 704         {
 705                 /* Jumper EZpad 6 Pro B */
 706                 .driver_data = (void *)&jumper_ezpad_6_pro_b_data,
 707                 .matches = {
 708                         DMI_MATCH(DMI_SYS_VENDOR, "Jumper"),
 709                         DMI_MATCH(DMI_PRODUCT_NAME, "EZpad"),
 710                         DMI_MATCH(DMI_BIOS_VERSION, "5.12"),
 711                         /* Above matches are too generic, add bios-date match */
 712                         DMI_MATCH(DMI_BIOS_DATE, "04/24/2018"),
 713                 },
 714         },
 715         {
 716                 /* Jumper EZpad mini3 */
 717                 .driver_data = (void *)&jumper_ezpad_mini3_data,
 718                 .matches = {
 719                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 720                         /* jumperx.T87.KFBNEEA02 with the version-nr dropped */
 721                         DMI_MATCH(DMI_BIOS_VERSION, "jumperx.T87.KFBNEEA"),
 722                 },
 723         },
 724         {
 725                 /* Mediacom Flexbook Edge 11 (same hw as TS Primebook C11) */
 726                 .driver_data = (void *)&trekstor_primebook_c11_data,
 727                 .matches = {
 728                         DMI_MATCH(DMI_SYS_VENDOR, "MEDIACOM"),
 729                         DMI_MATCH(DMI_PRODUCT_NAME, "FlexBook edge11 - M-FBE11"),
 730                 },
 731         },
 732         {
 733                 /* Myria MY8307 */
 734                 .driver_data = (void *)&myria_my8307_data,
 735                 .matches = {
 736                         DMI_MATCH(DMI_SYS_VENDOR, "Complet Electro Serv"),
 737                         DMI_MATCH(DMI_PRODUCT_NAME, "MY8307"),
 738                 },
 739         },
 740         {
 741                 /* Onda oBook 20 Plus */
 742                 .driver_data = (void *)&onda_obook_20_plus_data,
 743                 .matches = {
 744                         DMI_MATCH(DMI_SYS_VENDOR, "ONDA"),
 745                         DMI_MATCH(DMI_PRODUCT_NAME, "OBOOK 20 PLUS"),
 746                 },
 747         },
 748         {
 749                 /* ONDA V80 plus v3 (P80PSBG9V3A01501) */
 750                 .driver_data = (void *)&onda_v80_plus_v3_data,
 751                 .matches = {
 752                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "ONDA"),
 753                         DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "V80 PLUS")
 754                 },
 755         },
 756         {
 757                 /* ONDA V820w DualOS */
 758                 .driver_data = (void *)&onda_v820w_32g_data,
 759                 .matches = {
 760                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "ONDA"),
 761                         DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "V820w DualOS")
 762                 },
 763         },
 764         {
 765                 /* ONDA V891w revision P891WBEBV1B00 aka v1 */
 766                 .driver_data = (void *)&onda_v891w_v1_data,
 767                 .matches = {
 768                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "ONDA"),
 769                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "ONDA Tablet"),
 770                         DMI_EXACT_MATCH(DMI_BOARD_VERSION, "V001"),
 771                         /* Exact match, different versions need different fw */
 772                         DMI_EXACT_MATCH(DMI_BIOS_VERSION, "ONDA.W89EBBN08"),
 773                 },
 774         },
 775         {
 776                 /* ONDA V891w Dual OS P891DCF2V1A01274 64GB */
 777                 .driver_data = (void *)&onda_v891w_v3_data,
 778                 .matches = {
 779                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 780                         DMI_MATCH(DMI_PRODUCT_NAME, "ONDA Tablet"),
 781                         DMI_MATCH(DMI_BIOS_VERSION, "ONDA.D890HBBNR0A"),
 782                 },
 783         },
 784         {
 785                 /* Pipo W2S */
 786                 .driver_data = (void *)&pipo_w2s_data,
 787                 .matches = {
 788                         DMI_MATCH(DMI_SYS_VENDOR, "PIPO"),
 789                         DMI_MATCH(DMI_PRODUCT_NAME, "W2S"),
 790                 },
 791         },
 792         {
 793                 /* Ployer Momo7w (same hardware as the Trekstor ST70416-6) */
 794                 .driver_data = (void *)&trekstor_surftab_wintron70_data,
 795                 .matches = {
 796                         DMI_MATCH(DMI_SYS_VENDOR, "Shenzhen PLOYER"),
 797                         DMI_MATCH(DMI_PRODUCT_NAME, "MOMO7W"),
 798                         /* Exact match, different versions need different fw */
 799                         DMI_MATCH(DMI_BIOS_VERSION, "MOMO.G.WI71C.MABMRBA02"),
 800                 },
 801         },
 802         {
 803                 /* Point of View mobii wintab p800w (v2.0) */
 804                 .driver_data = (void *)&pov_mobii_wintab_p800w_v20_data,
 805                 .matches = {
 806                         DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
 807                         DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
 808                         DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1014"),
 809                         /* Above matches are too generic, add bios-date match */
 810                         DMI_MATCH(DMI_BIOS_DATE, "10/24/2014"),
 811                 },
 812         },
 813         {
 814                 /* Point of View mobii wintab p800w (v2.1) */
 815                 .driver_data = (void *)&pov_mobii_wintab_p800w_v21_data,
 816                 .matches = {
 817                         DMI_MATCH(DMI_BOARD_VENDOR, "AMI Corporation"),
 818                         DMI_MATCH(DMI_BOARD_NAME, "Aptio CRB"),
 819                         DMI_MATCH(DMI_BIOS_VERSION, "3BAIR1013"),
 820                         /* Above matches are too generic, add bios-date match */
 821                         DMI_MATCH(DMI_BIOS_DATE, "08/22/2014"),
 822                 },
 823         },
 824         {
 825                 /* Point of View mobii wintab p1006w (v1.0) */
 826                 .driver_data = (void *)&pov_mobii_wintab_p1006w_v10_data,
 827                 .matches = {
 828                         DMI_EXACT_MATCH(DMI_SYS_VENDOR, "Insyde"),
 829                         DMI_EXACT_MATCH(DMI_PRODUCT_NAME, "BayTrail"),
 830                         /* Note 105b is Foxcon's USB/PCI vendor id */
 831                         DMI_EXACT_MATCH(DMI_BOARD_VENDOR, "105B"),
 832                         DMI_EXACT_MATCH(DMI_BOARD_NAME, "0E57"),
 833                 },
 834         },
 835         {
 836                 /* Teclast X3 Plus */
 837                 .driver_data = (void *)&teclast_x3_plus_data,
 838                 .matches = {
 839                         DMI_MATCH(DMI_SYS_VENDOR, "TECLAST"),
 840                         DMI_MATCH(DMI_PRODUCT_NAME, "X3 Plus"),
 841                         DMI_MATCH(DMI_BOARD_NAME, "X3 Plus"),
 842                 },
 843         },
 844         {
 845                 /* Teclast X98 Plus II */
 846                 .driver_data = (void *)&teclast_x98plus2_data,
 847                 .matches = {
 848                         DMI_MATCH(DMI_SYS_VENDOR, "TECLAST"),
 849                         DMI_MATCH(DMI_PRODUCT_NAME, "X98 Plus II"),
 850                 },
 851         },
 852         {
 853                 /* Trekstor Primebook C11 */
 854                 .driver_data = (void *)&trekstor_primebook_c11_data,
 855                 .matches = {
 856                         DMI_MATCH(DMI_SYS_VENDOR, "TREKSTOR"),
 857                         DMI_MATCH(DMI_PRODUCT_NAME, "Primebook C11"),
 858                 },
 859         },
 860         {
 861                 /* Trekstor Primebook C13 */
 862                 .driver_data = (void *)&trekstor_primebook_c13_data,
 863                 .matches = {
 864                         DMI_MATCH(DMI_SYS_VENDOR, "TREKSTOR"),
 865                         DMI_MATCH(DMI_PRODUCT_NAME, "Primebook C13"),
 866                 },
 867         },
 868         {
 869                 /* Trekstor Primetab T13B */
 870                 .driver_data = (void *)&trekstor_primetab_t13b_data,
 871                 .matches = {
 872                         DMI_MATCH(DMI_SYS_VENDOR, "TREKSTOR"),
 873                         DMI_MATCH(DMI_PRODUCT_NAME, "Primetab T13B"),
 874                 },
 875         },
 876         {
 877                 /* TrekStor SurfTab twin 10.1 ST10432-8 */
 878                 .driver_data = (void *)&trekstor_surftab_twin_10_1_data,
 879                 .matches = {
 880                         DMI_MATCH(DMI_SYS_VENDOR, "TrekStor"),
 881                         DMI_MATCH(DMI_PRODUCT_NAME, "SurfTab twin 10.1"),
 882                 },
 883         },
 884         {
 885                 /* Trekstor Surftab Wintron 7.0 ST70416-6 */
 886                 .driver_data = (void *)&trekstor_surftab_wintron70_data,
 887                 .matches = {
 888                         DMI_MATCH(DMI_SYS_VENDOR, "Insyde"),
 889                         DMI_MATCH(DMI_PRODUCT_NAME, "ST70416-6"),
 890                         /* Exact match, different versions need different fw */
 891                         DMI_MATCH(DMI_BIOS_VERSION, "TREK.G.WI71C.JGBMRBA04"),
 892                 },
 893         },
 894         {
 895                 /* Trekstor Surftab Wintron 7.0 ST70416-6, newer BIOS */
 896                 .driver_data = (void *)&trekstor_surftab_wintron70_data,
 897                 .matches = {
 898                         DMI_MATCH(DMI_SYS_VENDOR, "TrekStor"),
 899                         DMI_MATCH(DMI_PRODUCT_NAME,
 900                                              "SurfTab wintron 7.0 ST70416-6"),
 901                         /* Exact match, different versions need different fw */
 902                         DMI_MATCH(DMI_BIOS_VERSION, "TREK.G.WI71C.JGBMRBA05"),
 903                 },
 904         },
 905         {
 906                 /* Yours Y8W81, same case and touchscreen as Chuwi Vi8 */
 907                 .driver_data = (void *)&chuwi_vi8_data,
 908                 .matches = {
 909                         DMI_MATCH(DMI_SYS_VENDOR, "YOURS"),
 910                         DMI_MATCH(DMI_PRODUCT_NAME, "Y8W81"),
 911                 },
 912         },
 913         { },
 914 };
 915
 916 static const struct ts_dmi_data *ts_data;
 917
 918 static void ts_dmi_add_props(struct i2c_client *client)
 919 {
 920         struct device *dev = &client->dev;
 921         int error;
 922
 923         if (has_acpi_companion(dev) &&
 924             !strncmp(ts_data->acpi_name, client->name, I2C_NAME_SIZE)) {
 925                 error = device_add_properties(dev, ts_data->properties);
 926                 if (error)
 927                         dev_err(dev, "failed to add properties: %d\n", error);
 928         }
 929 }
 930
 931 static int ts_dmi_notifier_call(struct notifier_block *nb,
 932                                        unsigned long action, void *data)
 933 {
 934         struct device *dev = data;
 935         struct i2c_client *client;
 936
 937         switch (action) {
 938         case BUS_NOTIFY_ADD_DEVICE:
 939                 client = i2c_verify_client(dev);
 940                 if (client)
 941                         ts_dmi_add_props(client);
 942                 break;
 943
 944         default:
 945                 break;
 946         }
 947
 948         return 0;
 949 }
 950
 951 static struct notifier_block ts_dmi_notifier = {
 952         .notifier_call = ts_dmi_notifier_call,
 953 };
 954
 955 static int __init ts_dmi_init(void)
 956 {
 957         const struct dmi_system_id *dmi_id;
 958         int error;
 959
 960         dmi_id = dmi_first_match(touchscreen_dmi_table);
 961         if (!dmi_id)
 962                 return 0; /* Not an error */
 963
 964         ts_data = dmi_id->driver_data;
 965
 966         error = bus_register_notifier(&i2c_bus_type, &ts_dmi_notifier);
 967         if (error)
 968                 pr_err("%s: failed to register i2c bus notifier: %d\n",
 969                         __func__, error);
 970
 971         return error;
 972 }
 973
 974 /*
 975  * We are registering out notifier after i2c core is initialized and i2c bus
 976  * itself is ready (which happens at postcore initcall level), but before
 977  * ACPI starts enumerating devices (at subsys initcall level).
 978  */
 979 arch_initcall(ts_dmi_init);