drivers/mfd/tps6586x.c

   1 /*
   2  * Core driver for TI TPS6586x PMIC family
   3  *
   4  * Copyright (c) 2010 CompuLab Ltd.
   5  * Mike Rapoport <mike@compulab.co.il>
   6  *
   7  * Based on da903x.c.
   8  * Copyright (C) 2008 Compulab, Ltd.
   9  * Mike Rapoport <mike@compulab.co.il>
  10  * Copyright (C) 2006-2008 Marvell International Ltd.
  11  * Eric Miao <eric.miao@marvell.com>
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License version 2 as
  15  * published by the Free Software Foundation.
  16  */
  17
  18 #include <linux/interrupt.h>
  19 #include <linux/irq.h>
  20 #include <linux/kernel.h>
  21 #include <linux/module.h>
  22 #include <linux/mutex.h>
  23 #include <linux/slab.h>
  24 #include <linux/gpio.h>
  25 #include <linux/i2c.h>
  26
  27 #include <linux/mfd/core.h>
  28 #include <linux/mfd/tps6586x.h>
  29
  30 /* GPIO control registers */
  31 #define TPS6586X_GPIOSET1       0x5d
  32 #define TPS6586X_GPIOSET2       0x5e
  33
  34 /* interrupt control registers */
  35 #define TPS6586X_INT_ACK1       0xb5
  36 #define TPS6586X_INT_ACK2       0xb6
  37 #define TPS6586X_INT_ACK3       0xb7
  38 #define TPS6586X_INT_ACK4       0xb8
  39
  40 /* interrupt mask registers */
  41 #define TPS6586X_INT_MASK1      0xb0
  42 #define TPS6586X_INT_MASK2      0xb1
  43 #define TPS6586X_INT_MASK3      0xb2
  44 #define TPS6586X_INT_MASK4      0xb3
  45 #define TPS6586X_INT_MASK5      0xb4
  46
  47 /* device id */
  48 #define TPS6586X_VERSIONCRC     0xcd
  49
  50 struct tps6586x_irq_data {
  51         u8      mask_reg;
  52         u8      mask_mask;
  53 };
  54
  55 #define TPS6586X_IRQ(_reg, _mask)                               \
  56         {                                                       \
  57                 .mask_reg = (_reg) - TPS6586X_INT_MASK1,        \
  58                 .mask_mask = (_mask),                           \
  59         }
  60
  61 static const struct tps6586x_irq_data tps6586x_irqs[] = {
  62         [TPS6586X_INT_PLDO_0]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
  63         [TPS6586X_INT_PLDO_1]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
  64         [TPS6586X_INT_PLDO_2]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
  65         [TPS6586X_INT_PLDO_3]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
  66         [TPS6586X_INT_PLDO_4]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
  67         [TPS6586X_INT_PLDO_5]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
  68         [TPS6586X_INT_PLDO_6]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
  69         [TPS6586X_INT_PLDO_7]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
  70         [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
  71         [TPS6586X_INT_ADC]      = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
  72         [TPS6586X_INT_PLDO_8]   = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
  73         [TPS6586X_INT_PLDO_9]   = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
  74         [TPS6586X_INT_PSM_0]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
  75         [TPS6586X_INT_PSM_1]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
  76         [TPS6586X_INT_PSM_2]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
  77         [TPS6586X_INT_PSM_3]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
  78         [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
  79         [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
  80         [TPS6586X_INT_USB_DET]  = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
  81         [TPS6586X_INT_AC_DET]   = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
  82         [TPS6586X_INT_BAT_DET]  = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
  83         [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
  84         [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
  85         [TPS6586X_INT_PP]       = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
  86         [TPS6586X_INT_RESUME]   = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
  87         [TPS6586X_INT_LOW_SYS]  = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
  88         [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
  89 };
  90
  91 struct tps6586x {
  92         struct mutex            lock;
  93         struct device           *dev;
  94         struct i2c_client       *client;
  95
  96         struct gpio_chip        gpio;
  97         struct irq_chip         irq_chip;
  98         struct mutex            irq_lock;
  99         int                     irq_base;
 100         u32                     irq_en;
 101         u8                      mask_cache[5];
 102         u8                      mask_reg[5];
 103 };
 104
 105 static inline int __tps6586x_read(struct i2c_client *client,
 106                                   int reg, uint8_t *val)
 107 {
 108         int ret;
 109
 110         ret = i2c_smbus_read_byte_data(client, reg);
 111         if (ret < 0) {
 112                 dev_err(&client->dev, "failed reading at 0x%02x\n", reg);
 113                 return ret;
 114         }
 115
 116         *val = (uint8_t)ret;
 117
 118         return 0;
 119 }
 120
 121 static inline int __tps6586x_reads(struct i2c_client *client, int reg,
 122                                    int len, uint8_t *val)
 123 {
 124         int ret;
 125
 126         ret = i2c_smbus_read_i2c_block_data(client, reg, len, val);
 127         if (ret < 0) {
 128                 dev_err(&client->dev, "failed reading from 0x%02x\n", reg);
 129                 return ret;
 130         }
 131
 132         return 0;
 133 }
 134
 135 static inline int __tps6586x_write(struct i2c_client *client,
 136                                  int reg, uint8_t val)
 137 {
 138         int ret;
 139
 140         ret = i2c_smbus_write_byte_data(client, reg, val);
 141         if (ret < 0) {
 142                 dev_err(&client->dev, "failed writing 0x%02x to 0x%02x\n",
 143                                 val, reg);
 144                 return ret;
 145         }
 146
 147         return 0;
 148 }
 149
 150 static inline int __tps6586x_writes(struct i2c_client *client, int reg,
 151                                   int len, uint8_t *val)
 152 {
 153         int ret, i;
 154
 155         for (i = 0; i < len; i++) {
 156                 ret = __tps6586x_write(client, reg + i, *(val + i));
 157                 if (ret < 0)
 158                         return ret;
 159         }
 160
 161         return 0;
 162 }
 163
 164 int tps6586x_write(struct device *dev, int reg, uint8_t val)
 165 {
 166         return __tps6586x_write(to_i2c_client(dev), reg, val);
 167 }
 168 EXPORT_SYMBOL_GPL(tps6586x_write);
 169
 170 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
 171 {
 172         return __tps6586x_writes(to_i2c_client(dev), reg, len, val);
 173 }
 174 EXPORT_SYMBOL_GPL(tps6586x_writes);
 175
 176 int tps6586x_read(struct device *dev, int reg, uint8_t *val)
 177 {
 178         return __tps6586x_read(to_i2c_client(dev), reg, val);
 179 }
 180 EXPORT_SYMBOL_GPL(tps6586x_read);
 181
 182 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
 183 {
 184         return __tps6586x_reads(to_i2c_client(dev), reg, len, val);
 185 }
 186 EXPORT_SYMBOL_GPL(tps6586x_reads);
 187
 188 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
 189 {
 190         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 191         uint8_t reg_val;
 192         int ret = 0;
 193
 194         mutex_lock(&tps6586x->lock);
 195
 196         ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
 197         if (ret)
 198                 goto out;
 199
 200         if ((reg_val & bit_mask) == 0) {
 201                 reg_val |= bit_mask;
 202                 ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
 203         }
 204 out:
 205         mutex_unlock(&tps6586x->lock);
 206         return ret;
 207 }
 208 EXPORT_SYMBOL_GPL(tps6586x_set_bits);
 209
 210 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
 211 {
 212         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 213         uint8_t reg_val;
 214         int ret = 0;
 215
 216         mutex_lock(&tps6586x->lock);
 217
 218         ret = __tps6586x_read(to_i2c_client(dev), reg, &reg_val);
 219         if (ret)
 220                 goto out;
 221
 222         if (reg_val & bit_mask) {
 223                 reg_val &= ~bit_mask;
 224                 ret = __tps6586x_write(to_i2c_client(dev), reg, reg_val);
 225         }
 226 out:
 227         mutex_unlock(&tps6586x->lock);
 228         return ret;
 229 }
 230 EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
 231
 232 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
 233 {
 234         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 235         uint8_t reg_val;
 236         int ret = 0;
 237
 238         mutex_lock(&tps6586x->lock);
 239
 240         ret = __tps6586x_read(tps6586x->client, reg, &reg_val);
 241         if (ret)
 242                 goto out;
 243
 244         if ((reg_val & mask) != val) {
 245                 reg_val = (reg_val & ~mask) | val;
 246                 ret = __tps6586x_write(tps6586x->client, reg, reg_val);
 247         }
 248 out:
 249         mutex_unlock(&tps6586x->lock);
 250         return ret;
 251 }
 252 EXPORT_SYMBOL_GPL(tps6586x_update);
 253
 254 static int tps6586x_gpio_get(struct gpio_chip *gc, unsigned offset)
 255 {
 256         struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
 257         uint8_t val;
 258         int ret;
 259
 260         ret = __tps6586x_read(tps6586x->client, TPS6586X_GPIOSET2, &val);
 261         if (ret)
 262                 return ret;
 263
 264         return !!(val & (1 << offset));
 265 }
 266
 267
 268 static void tps6586x_gpio_set(struct gpio_chip *chip, unsigned offset,
 269                               int value)
 270 {
 271         struct tps6586x *tps6586x = container_of(chip, struct tps6586x, gpio);
 272
 273         __tps6586x_write(tps6586x->client, TPS6586X_GPIOSET2,
 274                          value << offset);
 275 }
 276
 277 static int tps6586x_gpio_output(struct gpio_chip *gc, unsigned offset,
 278                                 int value)
 279 {
 280         struct tps6586x *tps6586x = container_of(gc, struct tps6586x, gpio);
 281         uint8_t val, mask;
 282
 283         tps6586x_gpio_set(gc, offset, value);
 284
 285         val = 0x1 << (offset * 2);
 286         mask = 0x3 << (offset * 2);
 287
 288         return tps6586x_update(tps6586x->dev, TPS6586X_GPIOSET1, val, mask);
 289 }
 290
 291 static int tps6586x_gpio_init(struct tps6586x *tps6586x, int gpio_base)
 292 {
 293         if (!gpio_base)
 294                 return 0;
 295
 296         tps6586x->gpio.owner            = THIS_MODULE;
 297         tps6586x->gpio.label            = tps6586x->client->name;
 298         tps6586x->gpio.dev              = tps6586x->dev;
 299         tps6586x->gpio.base             = gpio_base;
 300         tps6586x->gpio.ngpio            = 4;
 301         tps6586x->gpio.can_sleep        = 1;
 302
 303         /* FIXME: add handling of GPIOs as dedicated inputs */
 304         tps6586x->gpio.direction_output = tps6586x_gpio_output;
 305         tps6586x->gpio.set              = tps6586x_gpio_set;
 306         tps6586x->gpio.get              = tps6586x_gpio_get;
 307
 308         return gpiochip_add(&tps6586x->gpio);
 309 }
 310
 311 static int __remove_subdev(struct device *dev, void *unused)
 312 {
 313         platform_device_unregister(to_platform_device(dev));
 314         return 0;
 315 }
 316
 317 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
 318 {
 319         return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
 320 }
 321
 322 static void tps6586x_irq_lock(struct irq_data *data)
 323 {
 324         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 325
 326         mutex_lock(&tps6586x->irq_lock);
 327 }
 328
 329 static void tps6586x_irq_enable(struct irq_data *irq_data)
 330 {
 331         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 332         unsigned int __irq = irq_data->irq - tps6586x->irq_base;
 333         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 334
 335         tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
 336         tps6586x->irq_en |= (1 << __irq);
 337 }
 338
 339 static void tps6586x_irq_disable(struct irq_data *irq_data)
 340 {
 341         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 342
 343         unsigned int __irq = irq_data->irq - tps6586x->irq_base;
 344         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 345
 346         tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
 347         tps6586x->irq_en &= ~(1 << __irq);
 348 }
 349
 350 static void tps6586x_irq_sync_unlock(struct irq_data *data)
 351 {
 352         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 353         int i;
 354
 355         for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
 356                 if (tps6586x->mask_reg[i] != tps6586x->mask_cache[i]) {
 357                         if (!WARN_ON(tps6586x_write(tps6586x->dev,
 358                                                     TPS6586X_INT_MASK1 + i,
 359                                                     tps6586x->mask_reg[i])))
 360                                 tps6586x->mask_cache[i] = tps6586x->mask_reg[i];
 361                 }
 362         }
 363
 364         mutex_unlock(&tps6586x->irq_lock);
 365 }
 366
 367 static irqreturn_t tps6586x_irq(int irq, void *data)
 368 {
 369         struct tps6586x *tps6586x = data;
 370         u32 acks;
 371         int ret = 0;
 372
 373         ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
 374                              sizeof(acks), (uint8_t *)&acks);
 375
 376         if (ret < 0) {
 377                 dev_err(tps6586x->dev, "failed to read interrupt status\n");
 378                 return IRQ_NONE;
 379         }
 380
 381         acks = le32_to_cpu(acks);
 382
 383         while (acks) {
 384                 int i = __ffs(acks);
 385
 386                 if (tps6586x->irq_en & (1 << i))
 387                         handle_nested_irq(tps6586x->irq_base + i);
 388
 389                 acks &= ~(1 << i);
 390         }
 391
 392         return IRQ_HANDLED;
 393 }
 394
 395 static int __devinit tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 396                                        int irq_base)
 397 {
 398         int i, ret;
 399         u8 tmp[4];
 400
 401         if (!irq_base) {
 402                 dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
 403                 return -EINVAL;
 404         }
 405
 406         mutex_init(&tps6586x->irq_lock);
 407         for (i = 0; i < 5; i++) {
 408                 tps6586x->mask_cache[i] = 0xff;
 409                 tps6586x->mask_reg[i] = 0xff;
 410                 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
 411         }
 412
 413         tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
 414
 415         tps6586x->irq_base = irq_base;
 416
 417         tps6586x->irq_chip.name = "tps6586x";
 418         tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
 419         tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
 420         tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
 421         tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
 422
 423         for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
 424                 int __irq = i + tps6586x->irq_base;
 425                 irq_set_chip_data(__irq, tps6586x);
 426                 irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
 427                                          handle_simple_irq);
 428                 irq_set_nested_thread(__irq, 1);
 429 #ifdef CONFIG_ARM
 430                 set_irq_flags(__irq, IRQF_VALID);
 431 #endif
 432         }
 433
 434         ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
 435                                    "tps6586x", tps6586x);
 436
 437         if (!ret) {
 438                 device_init_wakeup(tps6586x->dev, 1);
 439                 enable_irq_wake(irq);
 440         }
 441
 442         return ret;
 443 }
 444
 445 static int __devinit tps6586x_add_subdevs(struct tps6586x *tps6586x,
 446                                           struct tps6586x_platform_data *pdata)
 447 {
 448         struct tps6586x_subdev_info *subdev;
 449         struct platform_device *pdev;
 450         int i, ret = 0;
 451
 452         for (i = 0; i < pdata->num_subdevs; i++) {
 453                 subdev = &pdata->subdevs[i];
 454
 455                 pdev = platform_device_alloc(subdev->name, subdev->id);
 456                 if (!pdev) {
 457                         ret = -ENOMEM;
 458                         goto failed;
 459                 }
 460
 461                 pdev->dev.parent = tps6586x->dev;
 462                 pdev->dev.platform_data = subdev->platform_data;
 463
 464                 ret = platform_device_add(pdev);
 465                 if (ret) {
 466                         platform_device_put(pdev);
 467                         goto failed;
 468                 }
 469         }
 470         return 0;
 471
 472 failed:
 473         tps6586x_remove_subdevs(tps6586x);
 474         return ret;
 475 }
 476
 477 static int __devinit tps6586x_i2c_probe(struct i2c_client *client,
 478                                         const struct i2c_device_id *id)
 479 {
 480         struct tps6586x_platform_data *pdata = client->dev.platform_data;
 481         struct tps6586x *tps6586x;
 482         int ret;
 483
 484         if (!pdata) {
 485                 dev_err(&client->dev, "tps6586x requires platform data\n");
 486                 return -ENOTSUPP;
 487         }
 488
 489         ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
 490         if (ret < 0) {
 491                 dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
 492                 return -EIO;
 493         }
 494
 495         dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
 496
 497         tps6586x = kzalloc(sizeof(struct tps6586x), GFP_KERNEL);
 498         if (tps6586x == NULL)
 499                 return -ENOMEM;
 500
 501         tps6586x->client = client;
 502         tps6586x->dev = &client->dev;
 503         i2c_set_clientdata(client, tps6586x);
 504
 505         mutex_init(&tps6586x->lock);
 506
 507         if (client->irq) {
 508                 ret = tps6586x_irq_init(tps6586x, client->irq,
 509                                         pdata->irq_base);
 510                 if (ret) {
 511                         dev_err(&client->dev, "IRQ init failed: %d\n", ret);
 512                         goto err_irq_init;
 513                 }
 514         }
 515
 516         ret = tps6586x_gpio_init(tps6586x, pdata->gpio_base);
 517         if (ret) {
 518                 dev_err(&client->dev, "GPIO registration failed: %d\n", ret);
 519                 goto err_gpio_init;
 520         }
 521
 522         ret = tps6586x_add_subdevs(tps6586x, pdata);
 523         if (ret) {
 524                 dev_err(&client->dev, "add devices failed: %d\n", ret);
 525                 goto err_add_devs;
 526         }
 527
 528         return 0;
 529
 530 err_add_devs:
 531         if (pdata->gpio_base) {
 532                 ret = gpiochip_remove(&tps6586x->gpio);
 533                 if (ret)
 534                         dev_err(&client->dev, "Can't remove gpio chip: %d\n",
 535                                 ret);
 536         }
 537 err_gpio_init:
 538         if (client->irq)
 539                 free_irq(client->irq, tps6586x);
 540 err_irq_init:
 541         kfree(tps6586x);
 542         return ret;
 543 }
 544
 545 static int __devexit tps6586x_i2c_remove(struct i2c_client *client)
 546 {
 547         struct tps6586x *tps6586x = i2c_get_clientdata(client);
 548         struct tps6586x_platform_data *pdata = client->dev.platform_data;
 549         int ret;
 550
 551         if (client->irq)
 552                 free_irq(client->irq, tps6586x);
 553
 554         if (pdata->gpio_base) {
 555                 ret = gpiochip_remove(&tps6586x->gpio);
 556                 if (ret)
 557                         dev_err(&client->dev, "Can't remove gpio chip: %d\n",
 558                                 ret);
 559         }
 560
 561         tps6586x_remove_subdevs(tps6586x);
 562         kfree(tps6586x);
 563         return 0;
 564 }
 565
 566 static const struct i2c_device_id tps6586x_id_table[] = {
 567         { "tps6586x", 0 },
 568         { },
 569 };
 570 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
 571
 572 static struct i2c_driver tps6586x_driver = {
 573         .driver = {
 574                 .name   = "tps6586x",
 575                 .owner  = THIS_MODULE,
 576         },
 577         .probe          = tps6586x_i2c_probe,
 578         .remove         = __devexit_p(tps6586x_i2c_remove),
 579         .id_table       = tps6586x_id_table,
 580 };
 581
 582 static int __init tps6586x_init(void)
 583 {
 584         return i2c_add_driver(&tps6586x_driver);
 585 }
 586 subsys_initcall(tps6586x_init);
 587
 588 static void __exit tps6586x_exit(void)
 589 {
 590         i2c_del_driver(&tps6586x_driver);
 591 }
 592 module_exit(tps6586x_exit);
 593
 594 MODULE_DESCRIPTION("TPS6586X core driver");
 595 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
 596 MODULE_LICENSE("GPL");