1 // SPDX-License-Identifier: GPL-2.0 2 3 #include <linux/bits.h> 4 #include <linux/bitfield.h> 5 #include <linux/delay.h> 6 #include <linux/gpio/consumer.h> 7 #include <linux/i2c.h> 8 #include <linux/kernel.h> 9 #include <linux/module.h> 10 #include <linux/pm_runtime.h> 11 #include <linux/regmap.h> 12 #include <linux/regulator/consumer.h> 13 #include <sound/pcm.h> 14 #include <sound/pcm_params.h> 15 #include <sound/soc.h> 16 #include <sound/tlv.h> 17 18 #define RT9120_REG_DEVID 0x00 19 #define RT9120_REG_I2SFMT 0x02 20 #define RT9120_REG_I2SWL 0x03 21 #define RT9120_REG_SDIOSEL 0x04 22 #define RT9120_REG_SYSCTL 0x05 23 #define RT9120_REG_SPKGAIN 0x07 24 #define RT9120_REG_VOLRAMP 0x0A 25 #define RT9120_REG_ERRRPT 0x10 26 #define RT9120_REG_MSVOL 0x20 27 #define RT9120_REG_SWRESET 0x40 28 #define RT9120_REG_INTERCFG 0x63 29 #define RT9120_REG_INTERNAL0 0x65 30 #define RT9120_REG_INTERNAL1 0x69 31 #define RT9120_REG_UVPOPT 0x6C 32 #define RT9120_REG_DIGCFG 0xF8 33 34 #define RT9120_VID_MASK GENMASK(15, 8) 35 #define RT9120_SWRST_MASK BIT(7) 36 #define RT9120_MUTE_MASK GENMASK(5, 4) 37 #define RT9120_I2SFMT_MASK GENMASK(4, 2) 38 #define RT9120_I2SFMT_SHIFT 2 39 #define RT9120_CFG_FMT_I2S 0 40 #define RT9120_CFG_FMT_LEFTJ 1 41 #define RT9120_CFG_FMT_RIGHTJ 2 42 #define RT9120_CFG_FMT_DSPA 3 43 #define RT9120_CFG_FMT_DSPB 7 44 #define RT9120_AUDBIT_MASK GENMASK(1, 0) 45 #define RT9120_CFG_AUDBIT_16 0 46 #define RT9120_CFG_AUDBIT_20 1 47 #define RT9120_CFG_AUDBIT_24 2 48 #define RT9120_AUDWL_MASK GENMASK(5, 0) 49 #define RT9120_CFG_WORDLEN_16 16 50 #define RT9120_CFG_WORDLEN_24 24 51 #define RT9120_CFG_WORDLEN_32 32 52 #define RT9120_DVDD_UVSEL_MASK GENMASK(5, 4) 53 #define RT9120_AUTOSYNC_MASK BIT(6) 54 55 #define RT9120_VENDOR_ID 0x42 56 #define RT9120S_VENDOR_ID 0x43 57 #define RT9120_RESET_WAITMS 20 58 #define RT9120_CHIPON_WAITMS 20 59 #define RT9120_AMPON_WAITMS 50 60 #define RT9120_AMPOFF_WAITMS 100 61 #define RT9120_LVAPP_THRESUV 2000000 62 63 /* 8000 to 192000 supported , only 176400 not support */ 64 #define RT9120_RATES_MASK (SNDRV_PCM_RATE_8000_192000 &\ 65 ~SNDRV_PCM_RATE_176400) 66 #define RT9120_FMTS_MASK (SNDRV_PCM_FMTBIT_S16_LE |\ 67 SNDRV_PCM_FMTBIT_S24_LE |\ 68 SNDRV_PCM_FMTBIT_S32_LE) 69 70 enum { 71 CHIP_IDX_RT9120 = 0, 72 CHIP_IDX_RT9120S, 73 CHIP_IDX_MAX 74 }; 75 76 struct rt9120_data { 77 struct device *dev; 78 struct regmap *regmap; 79 struct gpio_desc *pwdnn_gpio; 80 int chip_idx; 81 }; 82 83 /* 11bit [min,max,step] = [-103.9375dB, 24dB, 0.0625dB] */ 84 static const DECLARE_TLV_DB_SCALE(digital_tlv, -1039375, 625, 1); 85 86 /* {6, 8, 10, 12, 13, 14, 15, 16}dB */ 87 static const DECLARE_TLV_DB_RANGE(classd_tlv, 88 0, 3, TLV_DB_SCALE_ITEM(600, 200, 0), 89 4, 7, TLV_DB_SCALE_ITEM(1300, 100, 0) 90 ); 91 92 static const char * const sdo_select_text[] = { 93 "None", "INTF", "Final", "RMS Detect" 94 }; 95 96 static const struct soc_enum sdo_select_enum = 97 SOC_ENUM_SINGLE(RT9120_REG_SDIOSEL, 4, ARRAY_SIZE(sdo_select_text), 98 sdo_select_text); 99 100 static const struct snd_kcontrol_new rt9120_snd_controls[] = { 101 SOC_SINGLE_TLV("MS Volume", RT9120_REG_MSVOL, 0, 2047, 1, digital_tlv), 102 SOC_SINGLE_TLV("SPK Gain Volume", RT9120_REG_SPKGAIN, 0, 7, 0, classd_tlv), 103 SOC_SINGLE("PBTL Switch", RT9120_REG_SYSCTL, 3, 1, 0), 104 SOC_ENUM("SDO Select", sdo_select_enum), 105 }; 106 107 static int internal_power_event(struct snd_soc_dapm_widget *w, 108 struct snd_kcontrol *kcontrol, int event) 109 { 110 struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm); 111 112 switch (event) { 113 case SND_SOC_DAPM_PRE_PMU: 114 snd_soc_component_write(comp, RT9120_REG_ERRRPT, 0); 115 break; 116 case SND_SOC_DAPM_POST_PMU: 117 msleep(RT9120_AMPON_WAITMS); 118 break; 119 case SND_SOC_DAPM_POST_PMD: 120 msleep(RT9120_AMPOFF_WAITMS); 121 break; 122 default: 123 break; 124 } 125 126 return 0; 127 } 128 129 static const struct snd_soc_dapm_widget rt9120_dapm_widgets[] = { 130 SND_SOC_DAPM_MIXER("DMIX", SND_SOC_NOPM, 0, 0, NULL, 0), 131 SND_SOC_DAPM_DAC("LDAC", NULL, SND_SOC_NOPM, 0, 0), 132 SND_SOC_DAPM_DAC("RDAC", NULL, SND_SOC_NOPM, 0, 0), 133 SND_SOC_DAPM_SUPPLY("PWND", RT9120_REG_SYSCTL, 6, 1, 134 internal_power_event, SND_SOC_DAPM_PRE_PMU | 135 SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_POST_PMD), 136 SND_SOC_DAPM_PGA("SPKL PA", SND_SOC_NOPM, 0, 0, NULL, 0), 137 SND_SOC_DAPM_PGA("SPKR PA", SND_SOC_NOPM, 0, 0, NULL, 0), 138 SND_SOC_DAPM_OUTPUT("SPKL"), 139 SND_SOC_DAPM_OUTPUT("SPKR"), 140 }; 141 142 static const struct snd_soc_dapm_route rt9120_dapm_routes[] = { 143 { "DMIX", NULL, "AIF Playback" }, 144 /* SPKL */ 145 { "LDAC", NULL, "PWND" }, 146 { "LDAC", NULL, "DMIX" }, 147 { "SPKL PA", NULL, "LDAC" }, 148 { "SPKL", NULL, "SPKL PA" }, 149 /* SPKR */ 150 { "RDAC", NULL, "PWND" }, 151 { "RDAC", NULL, "DMIX" }, 152 { "SPKR PA", NULL, "RDAC" }, 153 { "SPKR", NULL, "SPKR PA" }, 154 /* Cap */ 155 { "AIF Capture", NULL, "LDAC" }, 156 { "AIF Capture", NULL, "RDAC" }, 157 }; 158 159 static int rt9120_codec_probe(struct snd_soc_component *comp) 160 { 161 struct rt9120_data *data = snd_soc_component_get_drvdata(comp); 162 163 snd_soc_component_init_regmap(comp, data->regmap); 164 165 pm_runtime_get_sync(comp->dev); 166 167 /* Internal setting */ 168 if (data->chip_idx == CHIP_IDX_RT9120S) { 169 snd_soc_component_write(comp, RT9120_REG_INTERCFG, 0xde); 170 snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x66); 171 } else 172 snd_soc_component_write(comp, RT9120_REG_INTERNAL0, 0x04); 173 174 pm_runtime_mark_last_busy(comp->dev); 175 pm_runtime_put(comp->dev); 176 177 return 0; 178 } 179 180 static const struct snd_soc_component_driver rt9120_component_driver = { 181 .probe = rt9120_codec_probe, 182 .controls = rt9120_snd_controls, 183 .num_controls = ARRAY_SIZE(rt9120_snd_controls), 184 .dapm_widgets = rt9120_dapm_widgets, 185 .num_dapm_widgets = ARRAY_SIZE(rt9120_dapm_widgets), 186 .dapm_routes = rt9120_dapm_routes, 187 .num_dapm_routes = ARRAY_SIZE(rt9120_dapm_routes), 188 .endianness = 1, 189 }; 190 191 static int rt9120_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) 192 { 193 struct snd_soc_component *comp = dai->component; 194 unsigned int format; 195 196 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 197 case SND_SOC_DAIFMT_I2S: 198 format = RT9120_CFG_FMT_I2S; 199 break; 200 case SND_SOC_DAIFMT_LEFT_J: 201 format = RT9120_CFG_FMT_LEFTJ; 202 break; 203 case SND_SOC_DAIFMT_RIGHT_J: 204 format = RT9120_CFG_FMT_RIGHTJ; 205 break; 206 case SND_SOC_DAIFMT_DSP_A: 207 format = RT9120_CFG_FMT_DSPA; 208 break; 209 case SND_SOC_DAIFMT_DSP_B: 210 format = RT9120_CFG_FMT_DSPB; 211 break; 212 default: 213 dev_err(dai->dev, "Unknown dai format\n"); 214 return -EINVAL; 215 } 216 217 snd_soc_component_update_bits(comp, RT9120_REG_I2SFMT, 218 RT9120_I2SFMT_MASK, 219 format << RT9120_I2SFMT_SHIFT); 220 return 0; 221 } 222 223 static int rt9120_hw_params(struct snd_pcm_substream *substream, 224 struct snd_pcm_hw_params *param, 225 struct snd_soc_dai *dai) 226 { 227 struct snd_soc_component *comp = dai->component; 228 unsigned int param_width, param_slot_width, auto_sync; 229 int width, fs; 230 231 switch (width = params_width(param)) { 232 case 16: 233 param_width = RT9120_CFG_AUDBIT_16; 234 break; 235 case 20: 236 param_width = RT9120_CFG_AUDBIT_20; 237 break; 238 case 24: 239 case 32: 240 param_width = RT9120_CFG_AUDBIT_24; 241 break; 242 default: 243 dev_err(dai->dev, "Unsupported data width [%d]\n", width); 244 return -EINVAL; 245 } 246 247 snd_soc_component_update_bits(comp, RT9120_REG_I2SFMT, 248 RT9120_AUDBIT_MASK, param_width); 249 250 switch (width = params_physical_width(param)) { 251 case 16: 252 param_slot_width = RT9120_CFG_WORDLEN_16; 253 break; 254 case 24: 255 param_slot_width = RT9120_CFG_WORDLEN_24; 256 break; 257 case 32: 258 param_slot_width = RT9120_CFG_WORDLEN_32; 259 break; 260 default: 261 dev_err(dai->dev, "Unsupported slot width [%d]\n", width); 262 return -EINVAL; 263 } 264 265 snd_soc_component_update_bits(comp, RT9120_REG_I2SWL, 266 RT9120_AUDWL_MASK, param_slot_width); 267 268 fs = width * params_channels(param); 269 /* If fs is divided by 48, disable auto sync */ 270 if (fs % 48 == 0) 271 auto_sync = 0; 272 else 273 auto_sync = RT9120_AUTOSYNC_MASK; 274 275 snd_soc_component_update_bits(comp, RT9120_REG_DIGCFG, 276 RT9120_AUTOSYNC_MASK, auto_sync); 277 return 0; 278 } 279 280 static const struct snd_soc_dai_ops rt9120_dai_ops = { 281 .set_fmt = rt9120_set_fmt, 282 .hw_params = rt9120_hw_params, 283 }; 284 285 static struct snd_soc_dai_driver rt9120_dai = { 286 .name = "rt9120_aif", 287 .playback = { 288 .stream_name = "AIF Playback", 289 .rates = RT9120_RATES_MASK, 290 .formats = RT9120_FMTS_MASK, 291 .rate_max = 192000, 292 .rate_min = 8000, 293 .channels_min = 1, 294 .channels_max = 2, 295 }, 296 .capture = { 297 .stream_name = "AIF Capture", 298 .rates = RT9120_RATES_MASK, 299 .formats = RT9120_FMTS_MASK, 300 .rate_max = 192000, 301 .rate_min = 8000, 302 .channels_min = 1, 303 .channels_max = 2, 304 }, 305 .ops = &rt9120_dai_ops, 306 .symmetric_rate = 1, 307 .symmetric_sample_bits = 1, 308 }; 309 310 static const struct regmap_range rt9120_rd_yes_ranges[] = { 311 regmap_reg_range(0x00, 0x0C), 312 regmap_reg_range(0x10, 0x15), 313 regmap_reg_range(0x20, 0x27), 314 regmap_reg_range(0x30, 0x38), 315 regmap_reg_range(0x3A, 0x40), 316 regmap_reg_range(0x63, 0x63), 317 regmap_reg_range(0x65, 0x65), 318 regmap_reg_range(0x69, 0x69), 319 regmap_reg_range(0x6C, 0x6C), 320 regmap_reg_range(0xF8, 0xF8) 321 }; 322 323 static const struct regmap_access_table rt9120_rd_table = { 324 .yes_ranges = rt9120_rd_yes_ranges, 325 .n_yes_ranges = ARRAY_SIZE(rt9120_rd_yes_ranges), 326 }; 327 328 static const struct regmap_range rt9120_wr_yes_ranges[] = { 329 regmap_reg_range(0x00, 0x00), 330 regmap_reg_range(0x02, 0x0A), 331 regmap_reg_range(0x10, 0x15), 332 regmap_reg_range(0x20, 0x27), 333 regmap_reg_range(0x30, 0x38), 334 regmap_reg_range(0x3A, 0x3D), 335 regmap_reg_range(0x40, 0x40), 336 regmap_reg_range(0x63, 0x63), 337 regmap_reg_range(0x65, 0x65), 338 regmap_reg_range(0x69, 0x69), 339 regmap_reg_range(0x6C, 0x6C), 340 regmap_reg_range(0xF8, 0xF8) 341 }; 342 343 static const struct regmap_access_table rt9120_wr_table = { 344 .yes_ranges = rt9120_wr_yes_ranges, 345 .n_yes_ranges = ARRAY_SIZE(rt9120_wr_yes_ranges), 346 }; 347 348 static bool rt9120_volatile_reg(struct device *dev, unsigned int reg) 349 { 350 switch (reg) { 351 case 0x00 ... 0x01: 352 case 0x10: 353 case 0x30 ... 0x40: 354 return true; 355 default: 356 return false; 357 } 358 } 359 360 static int rt9120_get_reg_size(unsigned int reg) 361 { 362 switch (reg) { 363 case 0x00: 364 case 0x20 ... 0x27: 365 return 2; 366 case 0x30 ... 0x3D: 367 return 3; 368 case 0x3E ... 0x3F: 369 return 4; 370 default: 371 return 1; 372 } 373 } 374 375 static int rt9120_reg_read(void *context, unsigned int reg, unsigned int *val) 376 { 377 struct rt9120_data *data = context; 378 struct i2c_client *i2c = to_i2c_client(data->dev); 379 int size = rt9120_get_reg_size(reg); 380 u8 raw[4] = {0}; 381 int ret; 382 383 ret = i2c_smbus_read_i2c_block_data(i2c, reg, size, raw); 384 if (ret < 0) 385 return ret; 386 else if (ret != size) 387 return -EIO; 388 389 switch (size) { 390 case 4: 391 *val = be32_to_cpup((__be32 *)raw); 392 break; 393 case 3: 394 *val = raw[0] << 16 | raw[1] << 8 | raw[2]; 395 break; 396 case 2: 397 *val = be16_to_cpup((__be16 *)raw); 398 break; 399 default: 400 *val = raw[0]; 401 } 402 403 return 0; 404 } 405 406 static int rt9120_reg_write(void *context, unsigned int reg, unsigned int val) 407 { 408 struct rt9120_data *data = context; 409 struct i2c_client *i2c = to_i2c_client(data->dev); 410 int size = rt9120_get_reg_size(reg); 411 __be32 be32_val; 412 u8 *rawp = (u8 *)&be32_val; 413 int offs = 4 - size; 414 415 be32_val = cpu_to_be32(val); 416 return i2c_smbus_write_i2c_block_data(i2c, reg, size, rawp + offs); 417 } 418 419 static const struct reg_default rt9120_reg_defaults[] = { 420 { .reg = 0x02, .def = 0x02 }, 421 { .reg = 0x03, .def = 0xf2 }, 422 { .reg = 0x04, .def = 0x01 }, 423 { .reg = 0x05, .def = 0xc0 }, 424 { .reg = 0x06, .def = 0x28 }, 425 { .reg = 0x07, .def = 0x04 }, 426 { .reg = 0x08, .def = 0xff }, 427 { .reg = 0x09, .def = 0x01 }, 428 { .reg = 0x0a, .def = 0x01 }, 429 { .reg = 0x0b, .def = 0x00 }, 430 { .reg = 0x0c, .def = 0x04 }, 431 { .reg = 0x11, .def = 0x30 }, 432 { .reg = 0x12, .def = 0x08 }, 433 { .reg = 0x13, .def = 0x12 }, 434 { .reg = 0x14, .def = 0x09 }, 435 { .reg = 0x15, .def = 0x00 }, 436 { .reg = 0x20, .def = 0x7ff }, 437 { .reg = 0x21, .def = 0x180 }, 438 { .reg = 0x22, .def = 0x180 }, 439 { .reg = 0x23, .def = 0x00 }, 440 { .reg = 0x24, .def = 0x80 }, 441 { .reg = 0x25, .def = 0x180 }, 442 { .reg = 0x26, .def = 0x640 }, 443 { .reg = 0x27, .def = 0x180 }, 444 { .reg = 0x63, .def = 0x5e }, 445 { .reg = 0x65, .def = 0x66 }, 446 { .reg = 0x6c, .def = 0xe0 }, 447 { .reg = 0xf8, .def = 0x44 }, 448 }; 449 450 static const struct regmap_config rt9120_regmap_config = { 451 .reg_bits = 8, 452 .val_bits = 32, 453 .max_register = RT9120_REG_DIGCFG, 454 .reg_defaults = rt9120_reg_defaults, 455 .num_reg_defaults = ARRAY_SIZE(rt9120_reg_defaults), 456 .cache_type = REGCACHE_RBTREE, 457 458 .reg_read = rt9120_reg_read, 459 .reg_write = rt9120_reg_write, 460 461 .volatile_reg = rt9120_volatile_reg, 462 .wr_table = &rt9120_wr_table, 463 .rd_table = &rt9120_rd_table, 464 }; 465 466 static int rt9120_check_vendor_info(struct rt9120_data *data) 467 { 468 unsigned int devid; 469 int ret; 470 471 ret = regmap_read(data->regmap, RT9120_REG_DEVID, &devid); 472 if (ret) 473 return ret; 474 475 devid = FIELD_GET(RT9120_VID_MASK, devid); 476 switch (devid) { 477 case RT9120_VENDOR_ID: 478 data->chip_idx = CHIP_IDX_RT9120; 479 break; 480 case RT9120S_VENDOR_ID: 481 data->chip_idx = CHIP_IDX_RT9120S; 482 break; 483 default: 484 dev_err(data->dev, "DEVID not correct [0x%0x]\n", devid); 485 return -ENODEV; 486 } 487 488 return 0; 489 } 490 491 static int rt9120_do_register_reset(struct rt9120_data *data) 492 { 493 int ret; 494 495 ret = regmap_write(data->regmap, RT9120_REG_SWRESET, 496 RT9120_SWRST_MASK); 497 if (ret) 498 return ret; 499 500 msleep(RT9120_RESET_WAITMS); 501 return 0; 502 } 503 504 static int rt9120_probe(struct i2c_client *i2c) 505 { 506 struct rt9120_data *data; 507 struct regulator *dvdd_supply; 508 int dvdd_supply_volt, ret; 509 510 data = devm_kzalloc(&i2c->dev, sizeof(*data), GFP_KERNEL); 511 if (!data) 512 return -ENOMEM; 513 514 data->dev = &i2c->dev; 515 i2c_set_clientdata(i2c, data); 516 517 data->pwdnn_gpio = devm_gpiod_get_optional(&i2c->dev, "pwdnn", 518 GPIOD_OUT_HIGH); 519 if (IS_ERR(data->pwdnn_gpio)) { 520 dev_err(&i2c->dev, "Failed to initialize 'pwdnn' gpio\n"); 521 return PTR_ERR(data->pwdnn_gpio); 522 } else if (data->pwdnn_gpio) { 523 dev_dbg(&i2c->dev, "'pwdnn' from low to high, wait chip on\n"); 524 msleep(RT9120_CHIPON_WAITMS); 525 } 526 527 data->regmap = devm_regmap_init(&i2c->dev, NULL, data, 528 &rt9120_regmap_config); 529 if (IS_ERR(data->regmap)) { 530 ret = PTR_ERR(data->regmap); 531 dev_err(&i2c->dev, "Failed to init regmap [%d]\n", ret); 532 return ret; 533 } 534 535 ret = rt9120_check_vendor_info(data); 536 if (ret) { 537 dev_err(&i2c->dev, "Failed to check vendor info\n"); 538 return ret; 539 } 540 541 ret = rt9120_do_register_reset(data); 542 if (ret) { 543 dev_err(&i2c->dev, "Failed to do register reset\n"); 544 return ret; 545 } 546 547 dvdd_supply = devm_regulator_get(&i2c->dev, "dvdd"); 548 if (IS_ERR(dvdd_supply)) { 549 dev_err(&i2c->dev, "No dvdd regulator found\n"); 550 return PTR_ERR(dvdd_supply); 551 } 552 553 dvdd_supply_volt = regulator_get_voltage(dvdd_supply); 554 if (dvdd_supply_volt <= RT9120_LVAPP_THRESUV) { 555 dev_dbg(&i2c->dev, "dvdd low voltage design\n"); 556 ret = regmap_update_bits(data->regmap, RT9120_REG_UVPOPT, 557 RT9120_DVDD_UVSEL_MASK, 0); 558 if (ret) { 559 dev_err(&i2c->dev, "Failed to config dvdd uvsel\n"); 560 return ret; 561 } 562 } 563 564 pm_runtime_set_autosuspend_delay(&i2c->dev, 1000); 565 pm_runtime_use_autosuspend(&i2c->dev); 566 pm_runtime_set_active(&i2c->dev); 567 pm_runtime_mark_last_busy(&i2c->dev); 568 pm_runtime_enable(&i2c->dev); 569 570 return devm_snd_soc_register_component(&i2c->dev, 571 &rt9120_component_driver, 572 &rt9120_dai, 1); 573 } 574 575 static void rt9120_remove(struct i2c_client *i2c) 576 { 577 pm_runtime_disable(&i2c->dev); 578 pm_runtime_set_suspended(&i2c->dev); 579 } 580 581 static int __maybe_unused rt9120_runtime_suspend(struct device *dev) 582 { 583 struct rt9120_data *data = dev_get_drvdata(dev); 584 585 if (data->pwdnn_gpio) { 586 regcache_cache_only(data->regmap, true); 587 regcache_mark_dirty(data->regmap); 588 gpiod_set_value(data->pwdnn_gpio, 0); 589 } 590 591 return 0; 592 } 593 594 static int __maybe_unused rt9120_runtime_resume(struct device *dev) 595 { 596 struct rt9120_data *data = dev_get_drvdata(dev); 597 598 if (data->pwdnn_gpio) { 599 gpiod_set_value(data->pwdnn_gpio, 1); 600 msleep(RT9120_CHIPON_WAITMS); 601 regcache_cache_only(data->regmap, false); 602 regcache_sync(data->regmap); 603 } 604 605 return 0; 606 } 607 608 static const struct dev_pm_ops rt9120_pm_ops = { 609 SET_RUNTIME_PM_OPS(rt9120_runtime_suspend, rt9120_runtime_resume, NULL) 610 }; 611 612 static const struct of_device_id __maybe_unused rt9120_device_table[] = { 613 { .compatible = "richtek,rt9120", }, 614 { } 615 }; 616 MODULE_DEVICE_TABLE(of, rt9120_device_table); 617 618 static struct i2c_driver rt9120_driver = { 619 .driver = { 620 .name = "rt9120", 621 .of_match_table = rt9120_device_table, 622 .pm = &rt9120_pm_ops, 623 }, 624 .probe_new = rt9120_probe, 625 .remove = rt9120_remove, 626 }; 627 module_i2c_driver(rt9120_driver); 628 629 MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 630 MODULE_DESCRIPTION("RT9120 Audio Amplifier Driver"); 631 MODULE_LICENSE("GPL"); 632