1 // SPDX-License-Identifier: GPL-2.0-or-later 2 3 /* 4 * Based on code by Hu Jin 5 * Copyright (C) 2014 Asahi Kasei Microdevices Corporation 6 */ 7 8 #include <linux/delay.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/i2c.h> 11 #include <linux/module.h> 12 #include <linux/of_device.h> 13 #include <linux/pm_runtime.h> 14 #include <linux/regulator/consumer.h> 15 #include <sound/soc.h> 16 #include <sound/tlv.h> 17 18 /* Registers and fields */ 19 #define AK4375_00_POWER_MANAGEMENT1 0x00 20 #define PMPLL BIT(0) /* 0: PLL off, 1: PLL on */ 21 #define AK4375_01_POWER_MANAGEMENT2 0x01 22 #define PMCP1 BIT(0) /* Charge Pump 1: LDO1 and DAC */ 23 #define PMCP2 BIT(1) /* Charge Pump 2: Class-G HP Amp */ 24 #define PMLDO1P BIT(4) 25 #define PMLDO1N BIT(5) 26 #define PMLDO (PMLDO1P | PMLDO1N) 27 #define AK4375_02_POWER_MANAGEMENT3 0x02 28 #define AK4375_03_POWER_MANAGEMENT4 0x03 29 #define AK4375_04_OUTPUT_MODE_SETTING 0x04 30 #define AK4375_05_CLOCK_MODE_SELECT 0x05 31 #define FS_MASK GENMASK(4, 0) 32 #define FS_8KHZ 0x00 33 #define FS_11_025KHZ 0x01 34 #define FS_16KHZ 0x04 35 #define FS_22_05KHZ 0x05 36 #define FS_32KHZ 0x08 37 #define FS_44_1KHZ 0x09 38 #define FS_48KHZ 0x0a 39 #define FS_88_2KHZ 0x0d 40 #define FS_96KHZ 0x0e 41 #define FS_176_4KHZ 0x11 42 #define FS_192KHZ 0x12 43 #define CM_MASK GENMASK(6, 5) /* For SRC Bypass mode */ 44 #define CM_0 (0x0 << 5) 45 #define CM_1 (0x1 << 5) 46 #define CM_2 (0x2 << 5) 47 #define CM_3 (0x3 << 5) 48 #define AK4375_06_DIGITAL_FILTER_SELECT 0x06 49 #define DADFSEL BIT(5) /* 0: in SRC Bypass mode, 1: in SRC mode */ 50 #define DASL BIT(6) 51 #define DASD BIT(7) 52 #define AK4375_07_DAC_MONO_MIXING 0x07 53 #define DACMUTE_MASK (GENMASK(5, 4) | GENMASK(1, 0)) /* Clear to mute */ 54 #define AK4375_08_JITTER_CLEANER_SETTING1 0x08 55 #define AK4375_09_JITTER_CLEANER_SETTING2 0x09 56 #define AK4375_0A_JITTER_CLEANER_SETTING3 0x0a 57 #define SELDAIN BIT(1) /* 0: SRC Bypass mode, 1: SRC mode */ 58 #define XCKSEL BIT(6) /* 0: PLL0, 1: MCKI */ 59 #define XCKCPSEL BIT(7) /* Should be equal to SELDAIN and XCKSEL */ 60 #define AK4375_0B_LCH_OUTPUT_VOLUME 0x0b 61 #define AK4375_0C_RCH_OUTPUT_VOLUME 0x0c 62 #define AK4375_0D_HP_VOLUME_CONTROL 0x0d 63 #define AK4375_0E_PLL_CLK_SOURCE_SELECT 0x0e 64 #define PLS BIT(0) /* 0: MCKI, 1: BCLK */ 65 #define AK4375_0F_PLL_REF_CLK_DIVIDER1 0x0f /* Reference clock divider [15:8] bits */ 66 #define AK4375_10_PLL_REF_CLK_DIVIDER2 0x10 /* Reference clock divider [7:0] bis */ 67 #define AK4375_11_PLL_FB_CLK_DIVIDER1 0x11 /* Feedback clock divider [15:8] bits */ 68 #define AK4375_12_PLL_FB_CLK_DIVIDER2 0x12 /* Feedback clock divider [7:0] bits */ 69 #define AK4375_13_SRC_CLK_SOURCE 0x13 /* SRC Bypass: SRCCKS=XCKSEL=SELDAIN=0 */ 70 #define SRCCKS BIT(0) /* SRC Clock source 0: MCKI, 1: PLL0 */ 71 #define DIV BIT(4) 72 #define AK4375_14_DAC_CLK_DIVIDER 0x14 73 #define AK4375_15_AUDIO_IF_FORMAT 0x15 74 #define DEVICEID_MASK GENMASK(7, 5) 75 #define AK4375_24_MODE_CONTROL 0x24 76 77 #define AK4375_PLL_FREQ_OUT_112896000 112896000 /* 44.1 kHz base rate */ 78 #define AK4375_PLL_FREQ_OUT_122880000 122880000 /* 32 and 48 kHz base rates */ 79 80 #define DEVICEID_AK4375 0x00 81 #define DEVICEID_AK4375A 0x01 82 #define DEVICEID_AK4376A 0x02 83 #define DEVICEID_AK4377 0x03 84 #define DEVICEID_AK4331 0x07 85 86 static const char * const supply_names[] = { 87 "avdd", "tvdd" 88 }; 89 90 struct ak4375_drvdata { 91 struct snd_soc_dai_driver *dai_drv; 92 const struct snd_soc_component_driver *comp_drv; 93 }; 94 95 struct ak4375_priv { 96 struct device *dev; 97 struct regmap *regmap; 98 struct gpio_desc *pdn_gpiod; 99 struct regulator_bulk_data supplies[ARRAY_SIZE(supply_names)]; 100 unsigned int rate; 101 unsigned int pld; 102 u8 mute_save; 103 }; 104 105 static const struct reg_default ak4375_reg_defaults[] = { 106 { 0x00, 0x00 }, { 0x01, 0x00 }, { 0x02, 0x00 }, 107 { 0x03, 0x00 }, { 0x04, 0x00 }, { 0x05, 0x00 }, 108 { 0x06, 0x00 }, { 0x07, 0x00 }, { 0x08, 0x00 }, 109 { 0x09, 0x00 }, { 0x0a, 0x00 }, { 0x0b, 0x19 }, 110 { 0x0c, 0x19 }, { 0x0d, 0x75 }, { 0x0e, 0x01 }, 111 { 0x0f, 0x00 }, { 0x10, 0x00 }, { 0x11, 0x00 }, 112 { 0x12, 0x00 }, { 0x13, 0x00 }, { 0x14, 0x00 }, 113 { 0x15, 0x00 }, { 0x24, 0x00 }, 114 }; 115 116 /* 117 * Output Digital volume control: 118 * from -12.5 to 3 dB in 0.5 dB steps (mute instead of -12.5 dB) 119 */ 120 static DECLARE_TLV_DB_SCALE(dac_tlv, -1250, 50, 0); 121 122 /* 123 * HP-Amp Analog volume control: 124 * from -4.2 to 6 dB in 2 dB steps (mute instead of -4.2 dB) 125 */ 126 static DECLARE_TLV_DB_SCALE(hpg_tlv, -4200, 20, 0); 127 128 static const char * const ak4375_ovolcn_select_texts[] = { "Dependent", "Independent" }; 129 static const char * const ak4375_mdac_select_texts[] = { "x1", "x1/2" }; 130 static const char * const ak4375_cpmode_select_texts[] = { 131 "Automatic Switching", 132 "+-VDD Operation", 133 "+-1/2VDD Operation" 134 }; 135 136 /* 137 * DASD, DASL bits Digital Filter Setting 138 * 0, 0 : Sharp Roll-Off Filter 139 * 0, 1 : Slow Roll-Off Filter 140 * 1, 0 : Short delay Sharp Roll-Off Filter 141 * 1, 1 : Short delay Slow Roll-Off Filter 142 */ 143 static const char * const ak4375_digfil_select_texts[] = { 144 "Sharp Roll-Off Filter", 145 "Slow Roll-Off Filter", 146 "Short delay Sharp Roll-Off Filter", 147 "Short delay Slow Roll-Off Filter", 148 }; 149 150 static const struct soc_enum ak4375_ovolcn_enum = 151 SOC_ENUM_SINGLE(AK4375_0B_LCH_OUTPUT_VOLUME, 7, 152 ARRAY_SIZE(ak4375_ovolcn_select_texts), ak4375_ovolcn_select_texts); 153 static const struct soc_enum ak4375_mdacl_enum = 154 SOC_ENUM_SINGLE(AK4375_07_DAC_MONO_MIXING, 2, 155 ARRAY_SIZE(ak4375_mdac_select_texts), ak4375_mdac_select_texts); 156 static const struct soc_enum ak4375_mdacr_enum = 157 SOC_ENUM_SINGLE(AK4375_07_DAC_MONO_MIXING, 6, 158 ARRAY_SIZE(ak4375_mdac_select_texts), ak4375_mdac_select_texts); 159 static const struct soc_enum ak4375_cpmode_enum = 160 SOC_ENUM_SINGLE(AK4375_03_POWER_MANAGEMENT4, 2, 161 ARRAY_SIZE(ak4375_cpmode_select_texts), ak4375_cpmode_select_texts); 162 static const struct soc_enum ak4375_digfil_enum = 163 SOC_ENUM_SINGLE(AK4375_06_DIGITAL_FILTER_SELECT, 6, 164 ARRAY_SIZE(ak4375_digfil_select_texts), ak4375_digfil_select_texts); 165 166 static const struct snd_kcontrol_new ak4375_snd_controls[] = { 167 SOC_DOUBLE_R_TLV("Digital Output Volume", AK4375_0B_LCH_OUTPUT_VOLUME, 168 AK4375_0C_RCH_OUTPUT_VOLUME, 0, 0x1f, 0, dac_tlv), 169 SOC_SINGLE_TLV("HP-Amp Analog Volume", 170 AK4375_0D_HP_VOLUME_CONTROL, 0, 0x1f, 0, hpg_tlv), 171 172 SOC_DOUBLE("DAC Signal Invert Switch", AK4375_07_DAC_MONO_MIXING, 3, 7, 1, 0), 173 174 SOC_ENUM("Digital Volume Control", ak4375_ovolcn_enum), 175 SOC_ENUM("DACL Signal Level", ak4375_mdacl_enum), 176 SOC_ENUM("DACR Signal Level", ak4375_mdacr_enum), 177 SOC_ENUM("Charge Pump Mode", ak4375_cpmode_enum), 178 SOC_ENUM("DAC Digital Filter Mode", ak4375_digfil_enum), 179 }; 180 181 static const struct snd_kcontrol_new ak4375_hpl_mixer_controls[] = { 182 SOC_DAPM_SINGLE("LDACL Switch", AK4375_07_DAC_MONO_MIXING, 0, 1, 0), 183 SOC_DAPM_SINGLE("RDACL Switch", AK4375_07_DAC_MONO_MIXING, 1, 1, 0), 184 }; 185 186 static const struct snd_kcontrol_new ak4375_hpr_mixer_controls[] = { 187 SOC_DAPM_SINGLE("LDACR Switch", AK4375_07_DAC_MONO_MIXING, 4, 1, 0), 188 SOC_DAPM_SINGLE("RDACR Switch", AK4375_07_DAC_MONO_MIXING, 5, 1, 0), 189 }; 190 191 static int ak4375_dac_event(struct snd_soc_dapm_widget *w, 192 struct snd_kcontrol *kcontrol, int event) 193 { 194 struct snd_soc_component *component = snd_soc_dapm_to_component(w->dapm); 195 196 switch (event) { 197 case SND_SOC_DAPM_PRE_PMU: 198 snd_soc_component_update_bits(component, AK4375_00_POWER_MANAGEMENT1, PMPLL, PMPLL); 199 snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP1, PMCP1); 200 usleep_range(6500, 7000); 201 snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMLDO, PMLDO); 202 usleep_range(1000, 2000); 203 break; 204 case SND_SOC_DAPM_POST_PMU: 205 snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP2, PMCP2); 206 usleep_range(4500, 5000); 207 break; 208 case SND_SOC_DAPM_PRE_PMD: 209 snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP2, 0x0); 210 break; 211 case SND_SOC_DAPM_POST_PMD: 212 snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMLDO, 0x0); 213 snd_soc_component_update_bits(component, AK4375_01_POWER_MANAGEMENT2, PMCP1, 0x0); 214 snd_soc_component_update_bits(component, AK4375_00_POWER_MANAGEMENT1, PMPLL, 0x0); 215 break; 216 } 217 218 return 0; 219 } 220 221 static const struct snd_soc_dapm_widget ak4375_dapm_widgets[] = { 222 SND_SOC_DAPM_DAC_E("DAC", NULL, AK4375_02_POWER_MANAGEMENT3, 0, 0, ak4375_dac_event, 223 SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMU | 224 SND_SOC_DAPM_PRE_PMD | SND_SOC_DAPM_POST_PMD), 225 226 SND_SOC_DAPM_AIF_IN("SDTI", "HiFi Playback", 0, SND_SOC_NOPM, 0, 0), 227 228 SND_SOC_DAPM_OUTPUT("HPL"), 229 SND_SOC_DAPM_OUTPUT("HPR"), 230 231 SND_SOC_DAPM_MIXER("HPR Mixer", AK4375_03_POWER_MANAGEMENT4, 1, 0, 232 &ak4375_hpr_mixer_controls[0], ARRAY_SIZE(ak4375_hpr_mixer_controls)), 233 SND_SOC_DAPM_MIXER("HPL Mixer", AK4375_03_POWER_MANAGEMENT4, 0, 0, 234 &ak4375_hpl_mixer_controls[0], ARRAY_SIZE(ak4375_hpl_mixer_controls)), 235 }; 236 237 static const struct snd_soc_dapm_route ak4375_intercon[] = { 238 { "DAC", NULL, "SDTI" }, 239 240 { "HPL Mixer", "LDACL Switch", "DAC" }, 241 { "HPL Mixer", "RDACL Switch", "DAC" }, 242 { "HPR Mixer", "LDACR Switch", "DAC" }, 243 { "HPR Mixer", "RDACR Switch", "DAC" }, 244 245 { "HPL", NULL, "HPL Mixer" }, 246 { "HPR", NULL, "HPR Mixer" }, 247 }; 248 249 static int ak4375_hw_params(struct snd_pcm_substream *substream, 250 struct snd_pcm_hw_params *params, 251 struct snd_soc_dai *dai) 252 { 253 struct snd_soc_component *component = dai->component; 254 struct ak4375_priv *ak4375 = snd_soc_component_get_drvdata(component); 255 unsigned int freq_in, freq_out; 256 257 ak4375->rate = params_rate(params); 258 259 if (ak4375->rate <= 96000) 260 ak4375->pld = 0; 261 else 262 ak4375->pld = 1; 263 264 freq_in = 32 * ak4375->rate / (ak4375->pld + 1); 265 266 if ((ak4375->rate % 8000) == 0) 267 freq_out = AK4375_PLL_FREQ_OUT_122880000; 268 else 269 freq_out = AK4375_PLL_FREQ_OUT_112896000; 270 271 return snd_soc_dai_set_pll(dai, 0, 0, freq_in, freq_out); 272 } 273 274 static int ak4375_dai_set_pll(struct snd_soc_dai *dai, int pll_id, int source, 275 unsigned int freq_in, unsigned int freq_out) 276 { 277 struct snd_soc_component *component = dai->component; 278 struct ak4375_priv *ak4375 = snd_soc_component_get_drvdata(component); 279 unsigned int mclk, plm, mdiv, div; 280 u8 cms, fs, cm; 281 282 cms = snd_soc_component_read(component, AK4375_05_CLOCK_MODE_SELECT); 283 fs = cms & ~FS_MASK; 284 cm = cms & ~CM_MASK; 285 286 switch (ak4375->rate) { 287 case 8000: 288 fs |= FS_8KHZ; 289 break; 290 case 11025: 291 fs |= FS_11_025KHZ; 292 break; 293 case 16000: 294 fs |= FS_16KHZ; 295 break; 296 case 22050: 297 fs |= FS_22_05KHZ; 298 break; 299 case 32000: 300 fs |= FS_32KHZ; 301 break; 302 case 44100: 303 fs |= FS_44_1KHZ; 304 break; 305 case 48000: 306 fs |= FS_48KHZ; 307 break; 308 case 88200: 309 fs |= FS_88_2KHZ; 310 break; 311 case 96000: 312 fs |= FS_96KHZ; 313 break; 314 case 176400: 315 fs |= FS_176_4KHZ; 316 break; 317 case 192000: 318 fs |= FS_192KHZ; 319 break; 320 default: 321 return -EINVAL; 322 } 323 324 if (ak4375->rate <= 24000) { 325 cm |= CM_1; 326 mclk = 512 * ak4375->rate; 327 mdiv = freq_out / mclk - 1; 328 div = 0; 329 } else if (ak4375->rate <= 96000) { 330 cm |= CM_0; 331 mclk = 256 * ak4375->rate; 332 mdiv = freq_out / mclk - 1; 333 div = 0; 334 } else { 335 cm |= CM_3; 336 mclk = 128 * ak4375->rate; 337 mdiv = 4; 338 div = 1; 339 } 340 341 /* Writing both fields in one go seems to make playback choppy on start */ 342 snd_soc_component_update_bits(component, AK4375_05_CLOCK_MODE_SELECT, FS_MASK, fs); 343 snd_soc_component_update_bits(component, AK4375_05_CLOCK_MODE_SELECT, CM_MASK, cm); 344 345 snd_soc_component_write(component, AK4375_0F_PLL_REF_CLK_DIVIDER1, 346 (ak4375->pld & 0xff00) >> 8); 347 snd_soc_component_write(component, AK4375_10_PLL_REF_CLK_DIVIDER2, 348 ak4375->pld & 0x00ff); 349 350 plm = freq_out / freq_in - 1; 351 snd_soc_component_write(component, AK4375_11_PLL_FB_CLK_DIVIDER1, (plm & 0xff00) >> 8); 352 snd_soc_component_write(component, AK4375_12_PLL_FB_CLK_DIVIDER2, plm & 0x00ff); 353 354 snd_soc_component_update_bits(component, AK4375_13_SRC_CLK_SOURCE, DIV, div); 355 356 /* SRCCKS bit: force to 1 for SRC PLL source clock */ 357 snd_soc_component_update_bits(component, AK4375_13_SRC_CLK_SOURCE, SRCCKS, SRCCKS); 358 359 snd_soc_component_write(component, AK4375_14_DAC_CLK_DIVIDER, mdiv); 360 361 dev_dbg(ak4375->dev, "rate=%d mclk=%d f_in=%d f_out=%d PLD=%d PLM=%d MDIV=%d DIV=%d\n", 362 ak4375->rate, mclk, freq_in, freq_out, ak4375->pld, plm, mdiv, div); 363 364 return 0; 365 } 366 367 static int ak4375_mute(struct snd_soc_dai *dai, int mute, int direction) 368 { 369 struct snd_soc_component *component = dai->component; 370 struct ak4375_priv *ak4375 = snd_soc_component_get_drvdata(component); 371 u8 val = snd_soc_component_read(component, AK4375_07_DAC_MONO_MIXING); 372 373 dev_dbg(ak4375->dev, "mute=%d val=%d\n", mute, val); 374 375 if (mute) { 376 ak4375->mute_save = val & DACMUTE_MASK; 377 val &= ~DACMUTE_MASK; 378 } else { 379 val |= ak4375->mute_save; 380 } 381 382 snd_soc_component_write(component, AK4375_07_DAC_MONO_MIXING, val); 383 384 return 0; 385 } 386 387 #define AK4375_RATES (SNDRV_PCM_RATE_8000_48000 |\ 388 SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 |\ 389 SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000) 390 391 #define AK4375_FORMATS (SNDRV_PCM_FMTBIT_S16_LE |\ 392 SNDRV_PCM_FMTBIT_S24_LE |\ 393 SNDRV_PCM_FMTBIT_S32_LE) 394 395 static const struct snd_soc_dai_ops ak4375_dai_ops = { 396 .hw_params = ak4375_hw_params, 397 .mute_stream = ak4375_mute, 398 .set_pll = ak4375_dai_set_pll, 399 }; 400 401 static struct snd_soc_dai_driver ak4375_dai = { 402 .name = "ak4375-hifi", 403 .playback = { 404 .stream_name = "HiFi Playback", 405 .channels_min = 1, 406 .channels_max = 2, 407 .rates = AK4375_RATES, 408 .rate_min = 8000, 409 .rate_max = 192000, 410 .formats = AK4375_FORMATS, 411 }, 412 .ops = &ak4375_dai_ops, 413 }; 414 415 static void ak4375_power_off(struct ak4375_priv *ak4375) 416 { 417 gpiod_set_value_cansleep(ak4375->pdn_gpiod, 0); 418 usleep_range(1000, 2000); 419 420 regulator_bulk_disable(ARRAY_SIZE(ak4375->supplies), ak4375->supplies); 421 } 422 423 static int ak4375_power_on(struct ak4375_priv *ak4375) 424 { 425 int ret; 426 427 ret = regulator_bulk_enable(ARRAY_SIZE(ak4375->supplies), ak4375->supplies); 428 if (ret < 0) { 429 dev_err(ak4375->dev, "Failed to enable regulators: %d\n", ret); 430 return ret; 431 } 432 433 usleep_range(3000, 4000); 434 435 gpiod_set_value_cansleep(ak4375->pdn_gpiod, 1); 436 usleep_range(1000, 2000); 437 438 return 0; 439 } 440 441 static int __maybe_unused ak4375_runtime_suspend(struct device *dev) 442 { 443 struct ak4375_priv *ak4375 = dev_get_drvdata(dev); 444 445 regcache_cache_only(ak4375->regmap, true); 446 ak4375_power_off(ak4375); 447 448 return 0; 449 } 450 451 static int __maybe_unused ak4375_runtime_resume(struct device *dev) 452 { 453 struct ak4375_priv *ak4375 = dev_get_drvdata(dev); 454 int ret; 455 456 ret = ak4375_power_on(ak4375); 457 if (ret < 0) 458 return ret; 459 460 regcache_cache_only(ak4375->regmap, false); 461 regcache_mark_dirty(ak4375->regmap); 462 463 return regcache_sync(ak4375->regmap); 464 } 465 466 static const struct snd_soc_component_driver soc_codec_dev_ak4375 = { 467 .controls = ak4375_snd_controls, 468 .num_controls = ARRAY_SIZE(ak4375_snd_controls), 469 .dapm_widgets = ak4375_dapm_widgets, 470 .num_dapm_widgets = ARRAY_SIZE(ak4375_dapm_widgets), 471 .dapm_routes = ak4375_intercon, 472 .num_dapm_routes = ARRAY_SIZE(ak4375_intercon), 473 .idle_bias_on = 1, 474 .use_pmdown_time = 1, 475 .endianness = 1, 476 }; 477 478 static const struct regmap_config ak4375_regmap = { 479 .reg_bits = 8, 480 .val_bits = 8, 481 .max_register = AK4375_24_MODE_CONTROL, 482 .reg_defaults = ak4375_reg_defaults, 483 .num_reg_defaults = ARRAY_SIZE(ak4375_reg_defaults), 484 .cache_type = REGCACHE_RBTREE, 485 }; 486 487 static const struct ak4375_drvdata ak4375_drvdata = { 488 .dai_drv = &ak4375_dai, 489 .comp_drv = &soc_codec_dev_ak4375, 490 }; 491 492 static const struct dev_pm_ops ak4375_pm = { 493 SET_RUNTIME_PM_OPS(ak4375_runtime_suspend, ak4375_runtime_resume, NULL) 494 SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, 495 pm_runtime_force_resume) 496 }; 497 498 static int ak4375_i2c_probe(struct i2c_client *i2c) 499 { 500 struct ak4375_priv *ak4375; 501 const struct ak4375_drvdata *drvdata; 502 unsigned int deviceid; 503 int ret, i; 504 505 ak4375 = devm_kzalloc(&i2c->dev, sizeof(*ak4375), GFP_KERNEL); 506 if (!ak4375) 507 return -ENOMEM; 508 509 ak4375->regmap = devm_regmap_init_i2c(i2c, &ak4375_regmap); 510 if (IS_ERR(ak4375->regmap)) 511 return PTR_ERR(ak4375->regmap); 512 513 i2c_set_clientdata(i2c, ak4375); 514 ak4375->dev = &i2c->dev; 515 516 drvdata = of_device_get_match_data(&i2c->dev); 517 518 for (i = 0; i < ARRAY_SIZE(supply_names); i++) 519 ak4375->supplies[i].supply = supply_names[i]; 520 521 ret = devm_regulator_bulk_get(ak4375->dev, ARRAY_SIZE(ak4375->supplies), ak4375->supplies); 522 if (ret < 0) { 523 dev_err(ak4375->dev, "Failed to get regulators: %d\n", ret); 524 return ret; 525 } 526 527 ak4375->pdn_gpiod = devm_gpiod_get_optional(ak4375->dev, "pdn", GPIOD_OUT_LOW); 528 if (IS_ERR(ak4375->pdn_gpiod)) 529 return dev_err_probe(ak4375->dev, PTR_ERR(ak4375->pdn_gpiod), 530 "failed to get pdn\n"); 531 532 ret = ak4375_power_on(ak4375); 533 if (ret < 0) 534 return ret; 535 536 /* Don't read deviceid from cache */ 537 regcache_cache_bypass(ak4375->regmap, true); 538 539 ret = regmap_read(ak4375->regmap, AK4375_15_AUDIO_IF_FORMAT, &deviceid); 540 if (ret < 0) { 541 dev_err(ak4375->dev, "unable to read DEVICEID!\n"); 542 return ret; 543 } 544 545 regcache_cache_bypass(ak4375->regmap, false); 546 547 deviceid = (deviceid & DEVICEID_MASK) >> 5; 548 549 switch (deviceid) { 550 case DEVICEID_AK4331: 551 dev_err(ak4375->dev, "found untested AK4331\n"); 552 return -EINVAL; 553 case DEVICEID_AK4375: 554 dev_dbg(ak4375->dev, "found AK4375\n"); 555 break; 556 case DEVICEID_AK4375A: 557 dev_dbg(ak4375->dev, "found AK4375A\n"); 558 break; 559 case DEVICEID_AK4376A: 560 dev_err(ak4375->dev, "found unsupported AK4376/A!\n"); 561 return -EINVAL; 562 case DEVICEID_AK4377: 563 dev_err(ak4375->dev, "found unsupported AK4377!\n"); 564 return -EINVAL; 565 default: 566 dev_err(ak4375->dev, "unrecognized DEVICEID!\n"); 567 return -EINVAL; 568 } 569 570 pm_runtime_set_active(ak4375->dev); 571 pm_runtime_enable(ak4375->dev); 572 573 ret = devm_snd_soc_register_component(ak4375->dev, drvdata->comp_drv, 574 drvdata->dai_drv, 1); 575 if (ret < 0) { 576 dev_err(ak4375->dev, "Failed to register CODEC: %d\n", ret); 577 return ret; 578 } 579 580 return 0; 581 } 582 583 static void ak4375_i2c_remove(struct i2c_client *i2c) 584 { 585 pm_runtime_disable(&i2c->dev); 586 } 587 588 static const struct of_device_id ak4375_of_match[] = { 589 { .compatible = "asahi-kasei,ak4375", .data = &ak4375_drvdata }, 590 { }, 591 }; 592 MODULE_DEVICE_TABLE(of, ak4375_of_match); 593 594 static struct i2c_driver ak4375_i2c_driver = { 595 .driver = { 596 .name = "ak4375", 597 .pm = &ak4375_pm, 598 .of_match_table = ak4375_of_match, 599 }, 600 .probe = ak4375_i2c_probe, 601 .remove = ak4375_i2c_remove, 602 }; 603 module_i2c_driver(ak4375_i2c_driver); 604 605 MODULE_AUTHOR("Vincent Knecht <vincent.knecht@mailoo.org>"); 606 MODULE_DESCRIPTION("ASoC AK4375 DAC driver"); 607 MODULE_LICENSE("GPL"); 608