sound/soc/codecs/da7219-aad.c

   1 /*
   2  * da7219-aad.c - Dialog DA7219 ALSA SoC AAD Driver
   3  *
   4  * Copyright (c) 2015 Dialog Semiconductor Ltd.
   5  *
   6  * Author: Adam Thomson <Adam.Thomson.Opensource@diasemi.com>
   7  *
   8  * This program is free software; you can redistribute  it and/or modify it
   9  * under  the terms of  the GNU General  Public License as published by the
  10  * Free Software Foundation;  either version 2 of the  License, or (at your
  11  * option) any later version.
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/clk.h>
  17 #include <linux/i2c.h>
  18 #include <linux/property.h>
  19 #include <linux/pm_wakeirq.h>
  20 #include <linux/slab.h>
  21 #include <linux/delay.h>
  22 #include <linux/workqueue.h>
  23 #include <sound/soc.h>
  24 #include <sound/jack.h>
  25 #include <sound/da7219.h>
  26
  27 #include "da7219.h"
  28 #include "da7219-aad.h"
  29
  30
  31 /*
  32  * Detection control
  33  */
  34
  35 void da7219_aad_jack_det(struct snd_soc_component *component, struct snd_soc_jack *jack)
  36 {
  37         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
  38
  39         da7219->aad->jack = jack;
  40         da7219->aad->jack_inserted = false;
  41
  42         /* Send an initial empty report */
  43         snd_soc_jack_report(jack, 0, DA7219_AAD_REPORT_ALL_MASK);
  44
  45         /* Enable/Disable jack detection */
  46         snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1,
  47                             DA7219_ACCDET_EN_MASK,
  48                             (jack ? DA7219_ACCDET_EN_MASK : 0));
  49 }
  50 EXPORT_SYMBOL_GPL(da7219_aad_jack_det);
  51
  52 /*
  53  * Button/HPTest work
  54  */
  55
  56 static void da7219_aad_btn_det_work(struct work_struct *work)
  57 {
  58         struct da7219_aad_priv *da7219_aad =
  59                 container_of(work, struct da7219_aad_priv, btn_det_work);
  60         struct snd_soc_component *component = da7219_aad->component;
  61         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
  62         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
  63         u8 statusa, micbias_ctrl;
  64         bool micbias_up = false;
  65         int retries = 0;
  66
  67         /* Drive headphones/lineout */
  68         snd_soc_component_update_bits(component, DA7219_HP_L_CTRL,
  69                             DA7219_HP_L_AMP_OE_MASK,
  70                             DA7219_HP_L_AMP_OE_MASK);
  71         snd_soc_component_update_bits(component, DA7219_HP_R_CTRL,
  72                             DA7219_HP_R_AMP_OE_MASK,
  73                             DA7219_HP_R_AMP_OE_MASK);
  74
  75         /* Make sure mic bias is up */
  76         snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");
  77         snd_soc_dapm_sync(dapm);
  78
  79         do {
  80                 statusa = snd_soc_component_read32(component, DA7219_ACCDET_STATUS_A);
  81                 if (statusa & DA7219_MICBIAS_UP_STS_MASK)
  82                         micbias_up = true;
  83                 else if (retries++ < DA7219_AAD_MICBIAS_CHK_RETRIES)
  84                         msleep(DA7219_AAD_MICBIAS_CHK_DELAY);
  85         } while ((!micbias_up) && (retries < DA7219_AAD_MICBIAS_CHK_RETRIES));
  86
  87         if (retries >= DA7219_AAD_MICBIAS_CHK_RETRIES)
  88                 dev_warn(component->dev, "Mic bias status check timed out");
  89
  90         da7219->micbias_on_event = true;
  91
  92         /*
  93          * Mic bias pulse required to enable mic, must be done before enabling
  94          * button detection to prevent erroneous button readings.
  95          */
  96         if (da7219_aad->micbias_pulse_lvl && da7219_aad->micbias_pulse_time) {
  97                 /* Pulse higher level voltage */
  98                 micbias_ctrl = snd_soc_component_read32(component, DA7219_MICBIAS_CTRL);
  99                 snd_soc_component_update_bits(component, DA7219_MICBIAS_CTRL,
 100                                     DA7219_MICBIAS1_LEVEL_MASK,
 101                                     da7219_aad->micbias_pulse_lvl);
 102                 msleep(da7219_aad->micbias_pulse_time);
 103                 snd_soc_component_write(component, DA7219_MICBIAS_CTRL, micbias_ctrl);
 104
 105         }
 106
 107         snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1,
 108                             DA7219_BUTTON_CONFIG_MASK,
 109                             da7219_aad->btn_cfg);
 110 }
 111
 112 static void da7219_aad_hptest_work(struct work_struct *work)
 113 {
 114         struct da7219_aad_priv *da7219_aad =
 115                 container_of(work, struct da7219_aad_priv, hptest_work);
 116         struct snd_soc_component *component = da7219_aad->component;
 117         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 118         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 119
 120         __le16 tonegen_freq_hptest;
 121         u8 pll_srm_sts, pll_ctrl, gain_ramp_ctrl, accdet_cfg8;
 122         int report = 0, ret = 0;
 123
 124         /* Lock DAPM, Kcontrols affected by this test and the PLL */
 125         snd_soc_dapm_mutex_lock(dapm);
 126         mutex_lock(&da7219->ctrl_lock);
 127         mutex_lock(&da7219->pll_lock);
 128
 129         /* Ensure MCLK is available for HP test procedure */
 130         if (da7219->mclk) {
 131                 ret = clk_prepare_enable(da7219->mclk);
 132                 if (ret) {
 133                         dev_err(component->dev, "Failed to enable mclk - %d\n", ret);
 134                         mutex_unlock(&da7219->pll_lock);
 135                         mutex_unlock(&da7219->ctrl_lock);
 136                         snd_soc_dapm_mutex_unlock(dapm);
 137                         return;
 138                 }
 139         }
 140
 141         /*
 142          * If MCLK not present, then we're using the internal oscillator and
 143          * require different frequency settings to achieve the same result.
 144          *
 145          * If MCLK is present, but PLL is not enabled then we enable it here to
 146          * ensure a consistent detection procedure.
 147          */
 148         pll_srm_sts = snd_soc_component_read32(component, DA7219_PLL_SRM_STS);
 149         if (pll_srm_sts & DA7219_PLL_SRM_STS_MCLK) {
 150                 tonegen_freq_hptest = cpu_to_le16(DA7219_AAD_HPTEST_RAMP_FREQ);
 151
 152                 pll_ctrl = snd_soc_component_read32(component, DA7219_PLL_CTRL);
 153                 if ((pll_ctrl & DA7219_PLL_MODE_MASK) == DA7219_PLL_MODE_BYPASS)
 154                         da7219_set_pll(component, DA7219_SYSCLK_PLL,
 155                                        DA7219_PLL_FREQ_OUT_98304);
 156         } else {
 157                 tonegen_freq_hptest = cpu_to_le16(DA7219_AAD_HPTEST_RAMP_FREQ_INT_OSC);
 158         }
 159
 160         /* Ensure gain ramping at fastest rate */
 161         gain_ramp_ctrl = snd_soc_component_read32(component, DA7219_GAIN_RAMP_CTRL);
 162         snd_soc_component_write(component, DA7219_GAIN_RAMP_CTRL, DA7219_GAIN_RAMP_RATE_X8);
 163
 164         /* Bypass cache so it saves current settings */
 165         regcache_cache_bypass(da7219->regmap, true);
 166
 167         /* Make sure Tone Generator is disabled */
 168         snd_soc_component_write(component, DA7219_TONE_GEN_CFG1, 0);
 169
 170         /* Enable HPTest block, 1KOhms check */
 171         snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_8,
 172                             DA7219_HPTEST_EN_MASK | DA7219_HPTEST_RES_SEL_MASK,
 173                             DA7219_HPTEST_EN_MASK |
 174                             DA7219_HPTEST_RES_SEL_1KOHMS);
 175
 176         /* Set gains to 0db */
 177         snd_soc_component_write(component, DA7219_DAC_L_GAIN, DA7219_DAC_DIGITAL_GAIN_0DB);
 178         snd_soc_component_write(component, DA7219_DAC_R_GAIN, DA7219_DAC_DIGITAL_GAIN_0DB);
 179         snd_soc_component_write(component, DA7219_HP_L_GAIN, DA7219_HP_AMP_GAIN_0DB);
 180         snd_soc_component_write(component, DA7219_HP_R_GAIN, DA7219_HP_AMP_GAIN_0DB);
 181
 182         /* Disable DAC filters, EQs and soft mute */
 183         snd_soc_component_update_bits(component, DA7219_DAC_FILTERS1, DA7219_HPF_MODE_MASK,
 184                             0);
 185         snd_soc_component_update_bits(component, DA7219_DAC_FILTERS4, DA7219_DAC_EQ_EN_MASK,
 186                             0);
 187         snd_soc_component_update_bits(component, DA7219_DAC_FILTERS5,
 188                             DA7219_DAC_SOFTMUTE_EN_MASK, 0);
 189
 190         /* Enable HP left & right paths */
 191         snd_soc_component_update_bits(component, DA7219_CP_CTRL, DA7219_CP_EN_MASK,
 192                             DA7219_CP_EN_MASK);
 193         snd_soc_component_update_bits(component, DA7219_DIG_ROUTING_DAC,
 194                             DA7219_DAC_L_SRC_MASK | DA7219_DAC_R_SRC_MASK,
 195                             DA7219_DAC_L_SRC_TONEGEN |
 196                             DA7219_DAC_R_SRC_TONEGEN);
 197         snd_soc_component_update_bits(component, DA7219_DAC_L_CTRL,
 198                             DA7219_DAC_L_EN_MASK | DA7219_DAC_L_MUTE_EN_MASK,
 199                             DA7219_DAC_L_EN_MASK);
 200         snd_soc_component_update_bits(component, DA7219_DAC_R_CTRL,
 201                             DA7219_DAC_R_EN_MASK | DA7219_DAC_R_MUTE_EN_MASK,
 202                             DA7219_DAC_R_EN_MASK);
 203         snd_soc_component_update_bits(component, DA7219_MIXOUT_L_SELECT,
 204                             DA7219_MIXOUT_L_MIX_SELECT_MASK,
 205                             DA7219_MIXOUT_L_MIX_SELECT_MASK);
 206         snd_soc_component_update_bits(component, DA7219_MIXOUT_R_SELECT,
 207                             DA7219_MIXOUT_R_MIX_SELECT_MASK,
 208                             DA7219_MIXOUT_R_MIX_SELECT_MASK);
 209         snd_soc_component_update_bits(component, DA7219_DROUTING_ST_OUTFILT_1L,
 210                             DA7219_OUTFILT_ST_1L_SRC_MASK,
 211                             DA7219_DMIX_ST_SRC_OUTFILT1L);
 212         snd_soc_component_update_bits(component, DA7219_DROUTING_ST_OUTFILT_1R,
 213                             DA7219_OUTFILT_ST_1R_SRC_MASK,
 214                             DA7219_DMIX_ST_SRC_OUTFILT1R);
 215         snd_soc_component_update_bits(component, DA7219_MIXOUT_L_CTRL,
 216                             DA7219_MIXOUT_L_AMP_EN_MASK,
 217                             DA7219_MIXOUT_L_AMP_EN_MASK);
 218         snd_soc_component_update_bits(component, DA7219_MIXOUT_R_CTRL,
 219                             DA7219_MIXOUT_R_AMP_EN_MASK,
 220                             DA7219_MIXOUT_R_AMP_EN_MASK);
 221         snd_soc_component_update_bits(component, DA7219_HP_L_CTRL,
 222                             DA7219_HP_L_AMP_OE_MASK | DA7219_HP_L_AMP_EN_MASK,
 223                             DA7219_HP_L_AMP_OE_MASK | DA7219_HP_L_AMP_EN_MASK);
 224         snd_soc_component_update_bits(component, DA7219_HP_R_CTRL,
 225                             DA7219_HP_R_AMP_OE_MASK | DA7219_HP_R_AMP_EN_MASK,
 226                             DA7219_HP_R_AMP_OE_MASK | DA7219_HP_R_AMP_EN_MASK);
 227         msleep(DA7219_SETTLING_DELAY);
 228         snd_soc_component_update_bits(component, DA7219_HP_L_CTRL,
 229                             DA7219_HP_L_AMP_MUTE_EN_MASK |
 230                             DA7219_HP_L_AMP_MIN_GAIN_EN_MASK, 0);
 231         snd_soc_component_update_bits(component, DA7219_HP_R_CTRL,
 232                             DA7219_HP_R_AMP_MUTE_EN_MASK |
 233                             DA7219_HP_R_AMP_MIN_GAIN_EN_MASK, 0);
 234
 235         /*
 236          * If we're running from the internal oscillator then give audio paths
 237          * time to settle before running test.
 238          */
 239         if (!(pll_srm_sts & DA7219_PLL_SRM_STS_MCLK))
 240                 msleep(DA7219_AAD_HPTEST_INT_OSC_PATH_DELAY);
 241
 242         /* Configure & start Tone Generator */
 243         snd_soc_component_write(component, DA7219_TONE_GEN_ON_PER, DA7219_BEEP_ON_PER_MASK);
 244         regmap_raw_write(da7219->regmap, DA7219_TONE_GEN_FREQ1_L,
 245                          &tonegen_freq_hptest, sizeof(tonegen_freq_hptest));
 246         snd_soc_component_update_bits(component, DA7219_TONE_GEN_CFG2,
 247                             DA7219_SWG_SEL_MASK | DA7219_TONE_GEN_GAIN_MASK,
 248                             DA7219_SWG_SEL_SRAMP |
 249                             DA7219_TONE_GEN_GAIN_MINUS_15DB);
 250         snd_soc_component_write(component, DA7219_TONE_GEN_CFG1, DA7219_START_STOPN_MASK);
 251
 252         msleep(DA7219_AAD_HPTEST_PERIOD);
 253
 254         /* Grab comparator reading */
 255         accdet_cfg8 = snd_soc_component_read32(component, DA7219_ACCDET_CONFIG_8);
 256         if (accdet_cfg8 & DA7219_HPTEST_COMP_MASK)
 257                 report |= SND_JACK_HEADPHONE;
 258         else
 259                 report |= SND_JACK_LINEOUT;
 260
 261         /* Stop tone generator */
 262         snd_soc_component_write(component, DA7219_TONE_GEN_CFG1, 0);
 263
 264         msleep(DA7219_AAD_HPTEST_PERIOD);
 265
 266         /* Restore original settings from cache */
 267         regcache_mark_dirty(da7219->regmap);
 268         regcache_sync_region(da7219->regmap, DA7219_HP_L_CTRL,
 269                              DA7219_HP_R_CTRL);
 270         msleep(DA7219_SETTLING_DELAY);
 271         regcache_sync_region(da7219->regmap, DA7219_MIXOUT_L_CTRL,
 272                              DA7219_MIXOUT_R_CTRL);
 273         regcache_sync_region(da7219->regmap, DA7219_DROUTING_ST_OUTFILT_1L,
 274                              DA7219_DROUTING_ST_OUTFILT_1R);
 275         regcache_sync_region(da7219->regmap, DA7219_MIXOUT_L_SELECT,
 276                              DA7219_MIXOUT_R_SELECT);
 277         regcache_sync_region(da7219->regmap, DA7219_DAC_L_CTRL,
 278                              DA7219_DAC_R_CTRL);
 279         regcache_sync_region(da7219->regmap, DA7219_DIG_ROUTING_DAC,
 280                              DA7219_DIG_ROUTING_DAC);
 281         regcache_sync_region(da7219->regmap, DA7219_CP_CTRL, DA7219_CP_CTRL);
 282         regcache_sync_region(da7219->regmap, DA7219_DAC_FILTERS5,
 283                              DA7219_DAC_FILTERS5);
 284         regcache_sync_region(da7219->regmap, DA7219_DAC_FILTERS4,
 285                              DA7219_DAC_FILTERS1);
 286         regcache_sync_region(da7219->regmap, DA7219_HP_L_GAIN,
 287                              DA7219_HP_R_GAIN);
 288         regcache_sync_region(da7219->regmap, DA7219_DAC_L_GAIN,
 289                              DA7219_DAC_R_GAIN);
 290         regcache_sync_region(da7219->regmap, DA7219_TONE_GEN_ON_PER,
 291                              DA7219_TONE_GEN_ON_PER);
 292         regcache_sync_region(da7219->regmap, DA7219_TONE_GEN_FREQ1_L,
 293                              DA7219_TONE_GEN_FREQ1_U);
 294         regcache_sync_region(da7219->regmap, DA7219_TONE_GEN_CFG1,
 295                              DA7219_TONE_GEN_CFG2);
 296
 297         regcache_cache_bypass(da7219->regmap, false);
 298
 299         /* Disable HPTest block */
 300         snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_8,
 301                             DA7219_HPTEST_EN_MASK, 0);
 302
 303         /*
 304          * If we're running from the internal oscillator then give audio paths
 305          * time to settle before allowing headphones to be driven as required.
 306          */
 307         if (!(pll_srm_sts & DA7219_PLL_SRM_STS_MCLK))
 308                 msleep(DA7219_AAD_HPTEST_INT_OSC_PATH_DELAY);
 309
 310         /* Restore gain ramping rate */
 311         snd_soc_component_write(component, DA7219_GAIN_RAMP_CTRL, gain_ramp_ctrl);
 312
 313         /* Drive Headphones/lineout */
 314         snd_soc_component_update_bits(component, DA7219_HP_L_CTRL, DA7219_HP_L_AMP_OE_MASK,
 315                             DA7219_HP_L_AMP_OE_MASK);
 316         snd_soc_component_update_bits(component, DA7219_HP_R_CTRL, DA7219_HP_R_AMP_OE_MASK,
 317                             DA7219_HP_R_AMP_OE_MASK);
 318
 319         /* Restore PLL to previous configuration, if re-configured */
 320         if ((pll_srm_sts & DA7219_PLL_SRM_STS_MCLK) &&
 321             ((pll_ctrl & DA7219_PLL_MODE_MASK) == DA7219_PLL_MODE_BYPASS))
 322                 da7219_set_pll(component, DA7219_SYSCLK_MCLK, 0);
 323
 324         /* Remove MCLK, if previously enabled */
 325         if (da7219->mclk)
 326                 clk_disable_unprepare(da7219->mclk);
 327
 328         mutex_unlock(&da7219->pll_lock);
 329         mutex_unlock(&da7219->ctrl_lock);
 330         snd_soc_dapm_mutex_unlock(dapm);
 331
 332         /*
 333          * Only send report if jack hasn't been removed during process,
 334          * otherwise it's invalid and we drop it.
 335          */
 336         if (da7219_aad->jack_inserted)
 337                 snd_soc_jack_report(da7219_aad->jack, report,
 338                                     SND_JACK_HEADSET | SND_JACK_LINEOUT);
 339 }
 340
 341
 342 /*
 343  * IRQ
 344  */
 345
 346 static irqreturn_t da7219_aad_irq_thread(int irq, void *data)
 347 {
 348         struct da7219_aad_priv *da7219_aad = data;
 349         struct snd_soc_component *component = da7219_aad->component;
 350         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 351         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 352         u8 events[DA7219_AAD_IRQ_REG_MAX];
 353         u8 statusa;
 354         int i, report = 0, mask = 0;
 355
 356         /* Read current IRQ events */
 357         regmap_bulk_read(da7219->regmap, DA7219_ACCDET_IRQ_EVENT_A,
 358                          events, DA7219_AAD_IRQ_REG_MAX);
 359
 360         if (!events[DA7219_AAD_IRQ_REG_A] && !events[DA7219_AAD_IRQ_REG_B])
 361                 return IRQ_NONE;
 362
 363         /* Read status register for jack insertion & type status */
 364         statusa = snd_soc_component_read32(component, DA7219_ACCDET_STATUS_A);
 365
 366         /* Clear events */
 367         regmap_bulk_write(da7219->regmap, DA7219_ACCDET_IRQ_EVENT_A,
 368                           events, DA7219_AAD_IRQ_REG_MAX);
 369
 370         dev_dbg(component->dev, "IRQ events = 0x%x|0x%x, status = 0x%x\n",
 371                 events[DA7219_AAD_IRQ_REG_A], events[DA7219_AAD_IRQ_REG_B],
 372                 statusa);
 373
 374         if (statusa & DA7219_JACK_INSERTION_STS_MASK) {
 375                 /* Jack Insertion */
 376                 if (events[DA7219_AAD_IRQ_REG_A] &
 377                     DA7219_E_JACK_INSERTED_MASK) {
 378                         report |= SND_JACK_MECHANICAL;
 379                         mask |= SND_JACK_MECHANICAL;
 380                         da7219_aad->jack_inserted = true;
 381                 }
 382
 383                 /* Jack type detection */
 384                 if (events[DA7219_AAD_IRQ_REG_A] &
 385                     DA7219_E_JACK_DETECT_COMPLETE_MASK) {
 386                         /*
 387                          * If 4-pole, then enable button detection, else perform
 388                          * HP impedance test to determine output type to report.
 389                          *
 390                          * We schedule work here as the tasks themselves can
 391                          * take time to complete, and in particular for hptest
 392                          * we want to be able to check if the jack was removed
 393                          * during the procedure as this will invalidate the
 394                          * result. By doing this as work, the IRQ thread can
 395                          * handle a removal, and we can check at the end of
 396                          * hptest if we have a valid result or not.
 397                          */
 398                         if (statusa & DA7219_JACK_TYPE_STS_MASK) {
 399                                 report |= SND_JACK_HEADSET;
 400                                 mask |= SND_JACK_HEADSET | SND_JACK_LINEOUT;
 401                                 schedule_work(&da7219_aad->btn_det_work);
 402                         } else {
 403                                 schedule_work(&da7219_aad->hptest_work);
 404                         }
 405                 }
 406
 407                 /* Button support for 4-pole jack */
 408                 if (statusa & DA7219_JACK_TYPE_STS_MASK) {
 409                         for (i = 0; i < DA7219_AAD_MAX_BUTTONS; ++i) {
 410                                 /* Button Press */
 411                                 if (events[DA7219_AAD_IRQ_REG_B] &
 412                                     (DA7219_E_BUTTON_A_PRESSED_MASK << i)) {
 413                                         report |= SND_JACK_BTN_0 >> i;
 414                                         mask |= SND_JACK_BTN_0 >> i;
 415                                 }
 416                         }
 417                         snd_soc_jack_report(da7219_aad->jack, report, mask);
 418
 419                         for (i = 0; i < DA7219_AAD_MAX_BUTTONS; ++i) {
 420                                 /* Button Release */
 421                                 if (events[DA7219_AAD_IRQ_REG_B] &
 422                                     (DA7219_E_BUTTON_A_RELEASED_MASK >> i)) {
 423                                         report &= ~(SND_JACK_BTN_0 >> i);
 424                                         mask |= SND_JACK_BTN_0 >> i;
 425                                 }
 426                         }
 427                 }
 428         } else {
 429                 /* Jack removal */
 430                 if (events[DA7219_AAD_IRQ_REG_A] & DA7219_E_JACK_REMOVED_MASK) {
 431                         report = 0;
 432                         mask |= DA7219_AAD_REPORT_ALL_MASK;
 433                         da7219_aad->jack_inserted = false;
 434
 435                         /* Un-drive headphones/lineout */
 436                         snd_soc_component_update_bits(component, DA7219_HP_R_CTRL,
 437                                             DA7219_HP_R_AMP_OE_MASK, 0);
 438                         snd_soc_component_update_bits(component, DA7219_HP_L_CTRL,
 439                                             DA7219_HP_L_AMP_OE_MASK, 0);
 440
 441                         /* Ensure button detection disabled */
 442                         snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1,
 443                                             DA7219_BUTTON_CONFIG_MASK, 0);
 444
 445                         da7219->micbias_on_event = false;
 446
 447                         /* Disable mic bias */
 448                         snd_soc_dapm_disable_pin(dapm, "Mic Bias");
 449                         snd_soc_dapm_sync(dapm);
 450
 451                         /* Cancel any pending work */
 452                         cancel_work_sync(&da7219_aad->btn_det_work);
 453                         cancel_work_sync(&da7219_aad->hptest_work);
 454                 }
 455         }
 456
 457         snd_soc_jack_report(da7219_aad->jack, report, mask);
 458
 459         return IRQ_HANDLED;
 460 }
 461
 462 /*
 463  * DT/ACPI to pdata conversion
 464  */
 465
 466 static enum da7219_aad_micbias_pulse_lvl
 467         da7219_aad_fw_micbias_pulse_lvl(struct snd_soc_component *component, u32 val)
 468 {
 469         switch (val) {
 470         case 2800:
 471                 return DA7219_AAD_MICBIAS_PULSE_LVL_2_8V;
 472         case 2900:
 473                 return DA7219_AAD_MICBIAS_PULSE_LVL_2_9V;
 474         default:
 475                 dev_warn(component->dev, "Invalid micbias pulse level");
 476                 return DA7219_AAD_MICBIAS_PULSE_LVL_OFF;
 477         }
 478 }
 479
 480 static enum da7219_aad_btn_cfg
 481         da7219_aad_fw_btn_cfg(struct snd_soc_component *component, u32 val)
 482 {
 483         switch (val) {
 484         case 2:
 485                 return DA7219_AAD_BTN_CFG_2MS;
 486         case 5:
 487                 return DA7219_AAD_BTN_CFG_5MS;
 488         case 10:
 489                 return DA7219_AAD_BTN_CFG_10MS;
 490         case 50:
 491                 return DA7219_AAD_BTN_CFG_50MS;
 492         case 100:
 493                 return DA7219_AAD_BTN_CFG_100MS;
 494         case 200:
 495                 return DA7219_AAD_BTN_CFG_200MS;
 496         case 500:
 497                 return DA7219_AAD_BTN_CFG_500MS;
 498         default:
 499                 dev_warn(component->dev, "Invalid button config");
 500                 return DA7219_AAD_BTN_CFG_10MS;
 501         }
 502 }
 503
 504 static enum da7219_aad_mic_det_thr
 505         da7219_aad_fw_mic_det_thr(struct snd_soc_component *component, u32 val)
 506 {
 507         switch (val) {
 508         case 200:
 509                 return DA7219_AAD_MIC_DET_THR_200_OHMS;
 510         case 500:
 511                 return DA7219_AAD_MIC_DET_THR_500_OHMS;
 512         case 750:
 513                 return DA7219_AAD_MIC_DET_THR_750_OHMS;
 514         case 1000:
 515                 return DA7219_AAD_MIC_DET_THR_1000_OHMS;
 516         default:
 517                 dev_warn(component->dev, "Invalid mic detect threshold");
 518                 return DA7219_AAD_MIC_DET_THR_500_OHMS;
 519         }
 520 }
 521
 522 static enum da7219_aad_jack_ins_deb
 523         da7219_aad_fw_jack_ins_deb(struct snd_soc_component *component, u32 val)
 524 {
 525         switch (val) {
 526         case 5:
 527                 return DA7219_AAD_JACK_INS_DEB_5MS;
 528         case 10:
 529                 return DA7219_AAD_JACK_INS_DEB_10MS;
 530         case 20:
 531                 return DA7219_AAD_JACK_INS_DEB_20MS;
 532         case 50:
 533                 return DA7219_AAD_JACK_INS_DEB_50MS;
 534         case 100:
 535                 return DA7219_AAD_JACK_INS_DEB_100MS;
 536         case 200:
 537                 return DA7219_AAD_JACK_INS_DEB_200MS;
 538         case 500:
 539                 return DA7219_AAD_JACK_INS_DEB_500MS;
 540         case 1000:
 541                 return DA7219_AAD_JACK_INS_DEB_1S;
 542         default:
 543                 dev_warn(component->dev, "Invalid jack insert debounce");
 544                 return DA7219_AAD_JACK_INS_DEB_20MS;
 545         }
 546 }
 547
 548 static enum da7219_aad_jack_det_rate
 549         da7219_aad_fw_jack_det_rate(struct snd_soc_component *component, const char *str)
 550 {
 551         if (!strcmp(str, "32ms_64ms")) {
 552                 return DA7219_AAD_JACK_DET_RATE_32_64MS;
 553         } else if (!strcmp(str, "64ms_128ms")) {
 554                 return DA7219_AAD_JACK_DET_RATE_64_128MS;
 555         } else if (!strcmp(str, "128ms_256ms")) {
 556                 return DA7219_AAD_JACK_DET_RATE_128_256MS;
 557         } else if (!strcmp(str, "256ms_512ms")) {
 558                 return DA7219_AAD_JACK_DET_RATE_256_512MS;
 559         } else {
 560                 dev_warn(component->dev, "Invalid jack detect rate");
 561                 return DA7219_AAD_JACK_DET_RATE_256_512MS;
 562         }
 563 }
 564
 565 static enum da7219_aad_jack_rem_deb
 566         da7219_aad_fw_jack_rem_deb(struct snd_soc_component *component, u32 val)
 567 {
 568         switch (val) {
 569         case 1:
 570                 return DA7219_AAD_JACK_REM_DEB_1MS;
 571         case 5:
 572                 return DA7219_AAD_JACK_REM_DEB_5MS;
 573         case 10:
 574                 return DA7219_AAD_JACK_REM_DEB_10MS;
 575         case 20:
 576                 return DA7219_AAD_JACK_REM_DEB_20MS;
 577         default:
 578                 dev_warn(component->dev, "Invalid jack removal debounce");
 579                 return DA7219_AAD_JACK_REM_DEB_1MS;
 580         }
 581 }
 582
 583 static enum da7219_aad_btn_avg
 584         da7219_aad_fw_btn_avg(struct snd_soc_component *component, u32 val)
 585 {
 586         switch (val) {
 587         case 1:
 588                 return DA7219_AAD_BTN_AVG_1;
 589         case 2:
 590                 return DA7219_AAD_BTN_AVG_2;
 591         case 4:
 592                 return DA7219_AAD_BTN_AVG_4;
 593         case 8:
 594                 return DA7219_AAD_BTN_AVG_8;
 595         default:
 596                 dev_warn(component->dev, "Invalid button average value");
 597                 return DA7219_AAD_BTN_AVG_2;
 598         }
 599 }
 600
 601 static enum da7219_aad_adc_1bit_rpt
 602         da7219_aad_fw_adc_1bit_rpt(struct snd_soc_component *component, u32 val)
 603 {
 604         switch (val) {
 605         case 1:
 606                 return DA7219_AAD_ADC_1BIT_RPT_1;
 607         case 2:
 608                 return DA7219_AAD_ADC_1BIT_RPT_2;
 609         case 4:
 610                 return DA7219_AAD_ADC_1BIT_RPT_4;
 611         case 8:
 612                 return DA7219_AAD_ADC_1BIT_RPT_8;
 613         default:
 614                 dev_warn(component->dev, "Invalid ADC 1-bit repeat value");
 615                 return DA7219_AAD_ADC_1BIT_RPT_1;
 616         }
 617 }
 618
 619 static struct da7219_aad_pdata *da7219_aad_fw_to_pdata(struct snd_soc_component *component)
 620 {
 621         struct device *dev = component->dev;
 622         struct i2c_client *i2c = to_i2c_client(dev);
 623         struct fwnode_handle *aad_np;
 624         struct da7219_aad_pdata *aad_pdata;
 625         const char *fw_str;
 626         u32 fw_val32;
 627
 628         aad_np = device_get_named_child_node(dev, "da7219_aad");
 629         if (!aad_np)
 630                 return NULL;
 631
 632         aad_pdata = devm_kzalloc(dev, sizeof(*aad_pdata), GFP_KERNEL);
 633         if (!aad_pdata)
 634                 return NULL;
 635
 636         aad_pdata->irq = i2c->irq;
 637
 638         if (fwnode_property_read_u32(aad_np, "dlg,micbias-pulse-lvl",
 639                                      &fw_val32) >= 0)
 640                 aad_pdata->micbias_pulse_lvl =
 641                         da7219_aad_fw_micbias_pulse_lvl(component, fw_val32);
 642         else
 643                 aad_pdata->micbias_pulse_lvl = DA7219_AAD_MICBIAS_PULSE_LVL_OFF;
 644
 645         if (fwnode_property_read_u32(aad_np, "dlg,micbias-pulse-time",
 646                                      &fw_val32) >= 0)
 647                 aad_pdata->micbias_pulse_time = fw_val32;
 648
 649         if (fwnode_property_read_u32(aad_np, "dlg,btn-cfg", &fw_val32) >= 0)
 650                 aad_pdata->btn_cfg = da7219_aad_fw_btn_cfg(component, fw_val32);
 651         else
 652                 aad_pdata->btn_cfg = DA7219_AAD_BTN_CFG_10MS;
 653
 654         if (fwnode_property_read_u32(aad_np, "dlg,mic-det-thr", &fw_val32) >= 0)
 655                 aad_pdata->mic_det_thr =
 656                         da7219_aad_fw_mic_det_thr(component, fw_val32);
 657         else
 658                 aad_pdata->mic_det_thr = DA7219_AAD_MIC_DET_THR_500_OHMS;
 659
 660         if (fwnode_property_read_u32(aad_np, "dlg,jack-ins-deb", &fw_val32) >= 0)
 661                 aad_pdata->jack_ins_deb =
 662                         da7219_aad_fw_jack_ins_deb(component, fw_val32);
 663         else
 664                 aad_pdata->jack_ins_deb = DA7219_AAD_JACK_INS_DEB_20MS;
 665
 666         if (!fwnode_property_read_string(aad_np, "dlg,jack-det-rate", &fw_str))
 667                 aad_pdata->jack_det_rate =
 668                         da7219_aad_fw_jack_det_rate(component, fw_str);
 669         else
 670                 aad_pdata->jack_det_rate = DA7219_AAD_JACK_DET_RATE_256_512MS;
 671
 672         if (fwnode_property_read_u32(aad_np, "dlg,jack-rem-deb", &fw_val32) >= 0)
 673                 aad_pdata->jack_rem_deb =
 674                         da7219_aad_fw_jack_rem_deb(component, fw_val32);
 675         else
 676                 aad_pdata->jack_rem_deb = DA7219_AAD_JACK_REM_DEB_1MS;
 677
 678         if (fwnode_property_read_u32(aad_np, "dlg,a-d-btn-thr", &fw_val32) >= 0)
 679                 aad_pdata->a_d_btn_thr = (u8) fw_val32;
 680         else
 681                 aad_pdata->a_d_btn_thr = 0xA;
 682
 683         if (fwnode_property_read_u32(aad_np, "dlg,d-b-btn-thr", &fw_val32) >= 0)
 684                 aad_pdata->d_b_btn_thr = (u8) fw_val32;
 685         else
 686                 aad_pdata->d_b_btn_thr = 0x16;
 687
 688         if (fwnode_property_read_u32(aad_np, "dlg,b-c-btn-thr", &fw_val32) >= 0)
 689                 aad_pdata->b_c_btn_thr = (u8) fw_val32;
 690         else
 691                 aad_pdata->b_c_btn_thr = 0x21;
 692
 693         if (fwnode_property_read_u32(aad_np, "dlg,c-mic-btn-thr", &fw_val32) >= 0)
 694                 aad_pdata->c_mic_btn_thr = (u8) fw_val32;
 695         else
 696                 aad_pdata->c_mic_btn_thr = 0x3E;
 697
 698         if (fwnode_property_read_u32(aad_np, "dlg,btn-avg", &fw_val32) >= 0)
 699                 aad_pdata->btn_avg = da7219_aad_fw_btn_avg(component, fw_val32);
 700         else
 701                 aad_pdata->btn_avg = DA7219_AAD_BTN_AVG_2;
 702
 703         if (fwnode_property_read_u32(aad_np, "dlg,adc-1bit-rpt", &fw_val32) >= 0)
 704                 aad_pdata->adc_1bit_rpt =
 705                         da7219_aad_fw_adc_1bit_rpt(component, fw_val32);
 706         else
 707                 aad_pdata->adc_1bit_rpt = DA7219_AAD_ADC_1BIT_RPT_1;
 708
 709         return aad_pdata;
 710 }
 711
 712 static void da7219_aad_handle_pdata(struct snd_soc_component *component)
 713 {
 714         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 715         struct da7219_aad_priv *da7219_aad = da7219->aad;
 716         struct da7219_pdata *pdata = da7219->pdata;
 717
 718         if ((pdata) && (pdata->aad_pdata)) {
 719                 struct da7219_aad_pdata *aad_pdata = pdata->aad_pdata;
 720                 u8 cfg, mask;
 721
 722                 da7219_aad->irq = aad_pdata->irq;
 723
 724                 switch (aad_pdata->micbias_pulse_lvl) {
 725                 case DA7219_AAD_MICBIAS_PULSE_LVL_2_8V:
 726                 case DA7219_AAD_MICBIAS_PULSE_LVL_2_9V:
 727                         da7219_aad->micbias_pulse_lvl =
 728                                 (aad_pdata->micbias_pulse_lvl <<
 729                                  DA7219_MICBIAS1_LEVEL_SHIFT);
 730                         break;
 731                 default:
 732                         break;
 733                 }
 734
 735                 da7219_aad->micbias_pulse_time = aad_pdata->micbias_pulse_time;
 736
 737                 switch (aad_pdata->btn_cfg) {
 738                 case DA7219_AAD_BTN_CFG_2MS:
 739                 case DA7219_AAD_BTN_CFG_5MS:
 740                 case DA7219_AAD_BTN_CFG_10MS:
 741                 case DA7219_AAD_BTN_CFG_50MS:
 742                 case DA7219_AAD_BTN_CFG_100MS:
 743                 case DA7219_AAD_BTN_CFG_200MS:
 744                 case DA7219_AAD_BTN_CFG_500MS:
 745                         da7219_aad->btn_cfg  = (aad_pdata->btn_cfg <<
 746                                                 DA7219_BUTTON_CONFIG_SHIFT);
 747                 }
 748
 749                 cfg = 0;
 750                 mask = 0;
 751                 switch (aad_pdata->mic_det_thr) {
 752                 case DA7219_AAD_MIC_DET_THR_200_OHMS:
 753                 case DA7219_AAD_MIC_DET_THR_500_OHMS:
 754                 case DA7219_AAD_MIC_DET_THR_750_OHMS:
 755                 case DA7219_AAD_MIC_DET_THR_1000_OHMS:
 756                         cfg |= (aad_pdata->mic_det_thr <<
 757                                 DA7219_MIC_DET_THRESH_SHIFT);
 758                         mask |= DA7219_MIC_DET_THRESH_MASK;
 759                 }
 760                 snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1, mask, cfg);
 761
 762                 cfg = 0;
 763                 mask = 0;
 764                 switch (aad_pdata->jack_ins_deb) {
 765                 case DA7219_AAD_JACK_INS_DEB_5MS:
 766                 case DA7219_AAD_JACK_INS_DEB_10MS:
 767                 case DA7219_AAD_JACK_INS_DEB_20MS:
 768                 case DA7219_AAD_JACK_INS_DEB_50MS:
 769                 case DA7219_AAD_JACK_INS_DEB_100MS:
 770                 case DA7219_AAD_JACK_INS_DEB_200MS:
 771                 case DA7219_AAD_JACK_INS_DEB_500MS:
 772                 case DA7219_AAD_JACK_INS_DEB_1S:
 773                         cfg |= (aad_pdata->jack_ins_deb <<
 774                                 DA7219_JACKDET_DEBOUNCE_SHIFT);
 775                         mask |= DA7219_JACKDET_DEBOUNCE_MASK;
 776                 }
 777                 switch (aad_pdata->jack_det_rate) {
 778                 case DA7219_AAD_JACK_DET_RATE_32_64MS:
 779                 case DA7219_AAD_JACK_DET_RATE_64_128MS:
 780                 case DA7219_AAD_JACK_DET_RATE_128_256MS:
 781                 case DA7219_AAD_JACK_DET_RATE_256_512MS:
 782                         cfg |= (aad_pdata->jack_det_rate <<
 783                                 DA7219_JACK_DETECT_RATE_SHIFT);
 784                         mask |= DA7219_JACK_DETECT_RATE_MASK;
 785                 }
 786                 switch (aad_pdata->jack_rem_deb) {
 787                 case DA7219_AAD_JACK_REM_DEB_1MS:
 788                 case DA7219_AAD_JACK_REM_DEB_5MS:
 789                 case DA7219_AAD_JACK_REM_DEB_10MS:
 790                 case DA7219_AAD_JACK_REM_DEB_20MS:
 791                         cfg |= (aad_pdata->jack_rem_deb <<
 792                                 DA7219_JACKDET_REM_DEB_SHIFT);
 793                         mask |= DA7219_JACKDET_REM_DEB_MASK;
 794                 }
 795                 snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_2, mask, cfg);
 796
 797                 snd_soc_component_write(component, DA7219_ACCDET_CONFIG_3,
 798                               aad_pdata->a_d_btn_thr);
 799                 snd_soc_component_write(component, DA7219_ACCDET_CONFIG_4,
 800                               aad_pdata->d_b_btn_thr);
 801                 snd_soc_component_write(component, DA7219_ACCDET_CONFIG_5,
 802                               aad_pdata->b_c_btn_thr);
 803                 snd_soc_component_write(component, DA7219_ACCDET_CONFIG_6,
 804                               aad_pdata->c_mic_btn_thr);
 805
 806                 cfg = 0;
 807                 mask = 0;
 808                 switch (aad_pdata->btn_avg) {
 809                 case DA7219_AAD_BTN_AVG_1:
 810                 case DA7219_AAD_BTN_AVG_2:
 811                 case DA7219_AAD_BTN_AVG_4:
 812                 case DA7219_AAD_BTN_AVG_8:
 813                         cfg |= (aad_pdata->btn_avg <<
 814                                 DA7219_BUTTON_AVERAGE_SHIFT);
 815                         mask |= DA7219_BUTTON_AVERAGE_MASK;
 816                 }
 817                 switch (aad_pdata->adc_1bit_rpt) {
 818                 case DA7219_AAD_ADC_1BIT_RPT_1:
 819                 case DA7219_AAD_ADC_1BIT_RPT_2:
 820                 case DA7219_AAD_ADC_1BIT_RPT_4:
 821                 case DA7219_AAD_ADC_1BIT_RPT_8:
 822                         cfg |= (aad_pdata->adc_1bit_rpt <<
 823                                DA7219_ADC_1_BIT_REPEAT_SHIFT);
 824                         mask |= DA7219_ADC_1_BIT_REPEAT_MASK;
 825                 }
 826                 snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_7, mask, cfg);
 827         }
 828 }
 829
 830
 831 /*
 832  * Suspend/Resume
 833  */
 834
 835 void da7219_aad_suspend(struct snd_soc_component *component)
 836 {
 837         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 838         struct da7219_aad_priv *da7219_aad = da7219->aad;
 839         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 840         u8 micbias_ctrl;
 841
 842         if (da7219_aad->jack) {
 843                 /* Disable jack detection during suspend */
 844                 snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1,
 845                                     DA7219_ACCDET_EN_MASK, 0);
 846
 847                 /*
 848                  * If we have a 4-pole jack inserted, then micbias will be
 849                  * enabled. We can disable micbias here, and keep a note to
 850                  * re-enable it on resume. If jack removal occurred during
 851                  * suspend then this will be dealt with through the IRQ handler.
 852                  */
 853                 if (da7219_aad->jack_inserted) {
 854                         micbias_ctrl = snd_soc_component_read32(component, DA7219_MICBIAS_CTRL);
 855                         if (micbias_ctrl & DA7219_MICBIAS1_EN_MASK) {
 856                                 snd_soc_dapm_disable_pin(dapm, "Mic Bias");
 857                                 snd_soc_dapm_sync(dapm);
 858                                 da7219_aad->micbias_resume_enable = true;
 859                         }
 860                 }
 861         }
 862 }
 863
 864 void da7219_aad_resume(struct snd_soc_component *component)
 865 {
 866         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 867         struct da7219_aad_priv *da7219_aad = da7219->aad;
 868         struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(component);
 869
 870         if (da7219_aad->jack) {
 871                 /* Re-enable micbias if previously enabled for 4-pole jack */
 872                 if (da7219_aad->jack_inserted &&
 873                     da7219_aad->micbias_resume_enable) {
 874                         snd_soc_dapm_force_enable_pin(dapm, "Mic Bias");
 875                         snd_soc_dapm_sync(dapm);
 876                         da7219_aad->micbias_resume_enable = false;
 877                 }
 878
 879                 /* Re-enable jack detection */
 880                 snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1,
 881                                     DA7219_ACCDET_EN_MASK,
 882                                     DA7219_ACCDET_EN_MASK);
 883         }
 884 }
 885
 886
 887 /*
 888  * Init/Exit
 889  */
 890
 891 int da7219_aad_init(struct snd_soc_component *component)
 892 {
 893         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 894         struct da7219_aad_priv *da7219_aad;
 895         u8 mask[DA7219_AAD_IRQ_REG_MAX];
 896         int ret;
 897
 898         da7219_aad = devm_kzalloc(component->dev, sizeof(*da7219_aad), GFP_KERNEL);
 899         if (!da7219_aad)
 900                 return -ENOMEM;
 901
 902         da7219->aad = da7219_aad;
 903         da7219_aad->component = component;
 904
 905         /* Handle any DT/ACPI/platform data */
 906         if (da7219->pdata && !da7219->pdata->aad_pdata)
 907                 da7219->pdata->aad_pdata = da7219_aad_fw_to_pdata(component);
 908
 909         da7219_aad_handle_pdata(component);
 910
 911         /* Disable button detection */
 912         snd_soc_component_update_bits(component, DA7219_ACCDET_CONFIG_1,
 913                             DA7219_BUTTON_CONFIG_MASK, 0);
 914
 915         INIT_WORK(&da7219_aad->btn_det_work, da7219_aad_btn_det_work);
 916         INIT_WORK(&da7219_aad->hptest_work, da7219_aad_hptest_work);
 917
 918         ret = request_threaded_irq(da7219_aad->irq, NULL,
 919                                    da7219_aad_irq_thread,
 920                                    IRQF_TRIGGER_LOW | IRQF_ONESHOT,
 921                                    "da7219-aad", da7219_aad);
 922         if (ret) {
 923                 dev_err(component->dev, "Failed to request IRQ: %d\n", ret);
 924                 return ret;
 925         }
 926
 927         /* Unmask AAD IRQs */
 928         memset(mask, 0, DA7219_AAD_IRQ_REG_MAX);
 929         regmap_bulk_write(da7219->regmap, DA7219_ACCDET_IRQ_MASK_A,
 930                           &mask, DA7219_AAD_IRQ_REG_MAX);
 931
 932         return 0;
 933 }
 934 EXPORT_SYMBOL_GPL(da7219_aad_init);
 935
 936 void da7219_aad_exit(struct snd_soc_component *component)
 937 {
 938         struct da7219_priv *da7219 = snd_soc_component_get_drvdata(component);
 939         struct da7219_aad_priv *da7219_aad = da7219->aad;
 940         u8 mask[DA7219_AAD_IRQ_REG_MAX];
 941
 942         /* Mask off AAD IRQs */
 943         memset(mask, DA7219_BYTE_MASK, DA7219_AAD_IRQ_REG_MAX);
 944         regmap_bulk_write(da7219->regmap, DA7219_ACCDET_IRQ_MASK_A,
 945                           mask, DA7219_AAD_IRQ_REG_MAX);
 946
 947         free_irq(da7219_aad->irq, da7219_aad);
 948
 949         cancel_work_sync(&da7219_aad->btn_det_work);
 950         cancel_work_sync(&da7219_aad->hptest_work);
 951 }
 952 EXPORT_SYMBOL_GPL(da7219_aad_exit);
 953
 954 MODULE_DESCRIPTION("ASoC DA7219 AAD Driver");
 955 MODULE_AUTHOR("Adam Thomson <Adam.Thomson.Opensource@diasemi.com>");
 956 MODULE_LICENSE("GPL");