drivers/mfd/tps6586x.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Core driver for TI TPS6586x PMIC family
   4  *
   5  * Copyright (c) 2010 CompuLab Ltd.
   6  * Mike Rapoport <mike@compulab.co.il>
   7  *
   8  * Based on da903x.c.
   9  * Copyright (C) 2008 Compulab, Ltd.
  10  * Mike Rapoport <mike@compulab.co.il>
  11  * Copyright (C) 2006-2008 Marvell International Ltd.
  12  * Eric Miao <eric.miao@marvell.com>
  13  */
  14
  15 #include <linux/interrupt.h>
  16 #include <linux/irq.h>
  17 #include <linux/irqdomain.h>
  18 #include <linux/kernel.h>
  19 #include <linux/module.h>
  20 #include <linux/mutex.h>
  21 #include <linux/slab.h>
  22 #include <linux/err.h>
  23 #include <linux/i2c.h>
  24 #include <linux/platform_device.h>
  25 #include <linux/regmap.h>
  26 #include <linux/of.h>
  27
  28 #include <linux/mfd/core.h>
  29 #include <linux/mfd/tps6586x.h>
  30
  31 #define TPS6586X_SUPPLYENE      0x14
  32 #define EXITSLREQ_BIT           BIT(1)
  33 #define SLEEP_MODE_BIT          BIT(3)
  34
  35 /* interrupt control registers */
  36 #define TPS6586X_INT_ACK1       0xb5
  37 #define TPS6586X_INT_ACK2       0xb6
  38 #define TPS6586X_INT_ACK3       0xb7
  39 #define TPS6586X_INT_ACK4       0xb8
  40
  41 /* interrupt mask registers */
  42 #define TPS6586X_INT_MASK1      0xb0
  43 #define TPS6586X_INT_MASK2      0xb1
  44 #define TPS6586X_INT_MASK3      0xb2
  45 #define TPS6586X_INT_MASK4      0xb3
  46 #define TPS6586X_INT_MASK5      0xb4
  47
  48 /* device id */
  49 #define TPS6586X_VERSIONCRC     0xcd
  50
  51 /* Maximum register */
  52 #define TPS6586X_MAX_REGISTER   TPS6586X_VERSIONCRC
  53
  54 struct tps6586x_irq_data {
  55         u8      mask_reg;
  56         u8      mask_mask;
  57 };
  58
  59 #define TPS6586X_IRQ(_reg, _mask)                               \
  60         {                                                       \
  61                 .mask_reg = (_reg) - TPS6586X_INT_MASK1,        \
  62                 .mask_mask = (_mask),                           \
  63         }
  64
  65 static const struct tps6586x_irq_data tps6586x_irqs[] = {
  66         [TPS6586X_INT_PLDO_0]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
  67         [TPS6586X_INT_PLDO_1]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
  68         [TPS6586X_INT_PLDO_2]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
  69         [TPS6586X_INT_PLDO_3]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
  70         [TPS6586X_INT_PLDO_4]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
  71         [TPS6586X_INT_PLDO_5]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
  72         [TPS6586X_INT_PLDO_6]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
  73         [TPS6586X_INT_PLDO_7]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
  74         [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
  75         [TPS6586X_INT_ADC]      = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
  76         [TPS6586X_INT_PLDO_8]   = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
  77         [TPS6586X_INT_PLDO_9]   = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
  78         [TPS6586X_INT_PSM_0]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
  79         [TPS6586X_INT_PSM_1]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
  80         [TPS6586X_INT_PSM_2]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
  81         [TPS6586X_INT_PSM_3]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
  82         [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
  83         [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
  84         [TPS6586X_INT_USB_DET]  = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
  85         [TPS6586X_INT_AC_DET]   = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
  86         [TPS6586X_INT_BAT_DET]  = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
  87         [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
  88         [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
  89         [TPS6586X_INT_PP]       = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
  90         [TPS6586X_INT_RESUME]   = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
  91         [TPS6586X_INT_LOW_SYS]  = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
  92         [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
  93 };
  94
  95 static struct resource tps6586x_rtc_resources[] = {
  96         {
  97                 .start  = TPS6586X_INT_RTC_ALM1,
  98                 .end    = TPS6586X_INT_RTC_ALM1,
  99                 .flags  = IORESOURCE_IRQ,
 100         },
 101 };
 102
 103 static const struct mfd_cell tps6586x_cell[] = {
 104         {
 105                 .name = "tps6586x-gpio",
 106         },
 107         {
 108                 .name = "tps6586x-regulator",
 109         },
 110         {
 111                 .name = "tps6586x-rtc",
 112                 .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
 113                 .resources = &tps6586x_rtc_resources[0],
 114         },
 115         {
 116                 .name = "tps6586x-onkey",
 117         },
 118 };
 119
 120 struct tps6586x {
 121         struct device           *dev;
 122         struct i2c_client       *client;
 123         struct regmap           *regmap;
 124         int                     version;
 125
 126         int                     irq;
 127         struct irq_chip         irq_chip;
 128         struct mutex            irq_lock;
 129         int                     irq_base;
 130         u32                     irq_en;
 131         u8                      mask_reg[5];
 132         struct irq_domain       *irq_domain;
 133 };
 134
 135 static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
 136 {
 137         return i2c_get_clientdata(to_i2c_client(dev));
 138 }
 139
 140 int tps6586x_write(struct device *dev, int reg, uint8_t val)
 141 {
 142         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 143
 144         return regmap_write(tps6586x->regmap, reg, val);
 145 }
 146 EXPORT_SYMBOL_GPL(tps6586x_write);
 147
 148 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
 149 {
 150         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 151
 152         return regmap_bulk_write(tps6586x->regmap, reg, val, len);
 153 }
 154 EXPORT_SYMBOL_GPL(tps6586x_writes);
 155
 156 int tps6586x_read(struct device *dev, int reg, uint8_t *val)
 157 {
 158         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 159         unsigned int rval;
 160         int ret;
 161
 162         ret = regmap_read(tps6586x->regmap, reg, &rval);
 163         if (!ret)
 164                 *val = rval;
 165         return ret;
 166 }
 167 EXPORT_SYMBOL_GPL(tps6586x_read);
 168
 169 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
 170 {
 171         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 172
 173         return regmap_bulk_read(tps6586x->regmap, reg, val, len);
 174 }
 175 EXPORT_SYMBOL_GPL(tps6586x_reads);
 176
 177 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
 178 {
 179         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 180
 181         return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
 182 }
 183 EXPORT_SYMBOL_GPL(tps6586x_set_bits);
 184
 185 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
 186 {
 187         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 188
 189         return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
 190 }
 191 EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
 192
 193 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
 194 {
 195         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 196
 197         return regmap_update_bits(tps6586x->regmap, reg, mask, val);
 198 }
 199 EXPORT_SYMBOL_GPL(tps6586x_update);
 200
 201 int tps6586x_irq_get_virq(struct device *dev, int irq)
 202 {
 203         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 204
 205         return irq_create_mapping(tps6586x->irq_domain, irq);
 206 }
 207 EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
 208
 209 int tps6586x_get_version(struct device *dev)
 210 {
 211         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 212
 213         return tps6586x->version;
 214 }
 215 EXPORT_SYMBOL_GPL(tps6586x_get_version);
 216
 217 static int __remove_subdev(struct device *dev, void *unused)
 218 {
 219         platform_device_unregister(to_platform_device(dev));
 220         return 0;
 221 }
 222
 223 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
 224 {
 225         return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
 226 }
 227
 228 static void tps6586x_irq_lock(struct irq_data *data)
 229 {
 230         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 231
 232         mutex_lock(&tps6586x->irq_lock);
 233 }
 234
 235 static void tps6586x_irq_enable(struct irq_data *irq_data)
 236 {
 237         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 238         unsigned int __irq = irq_data->hwirq;
 239         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 240
 241         tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
 242         tps6586x->irq_en |= (1 << __irq);
 243 }
 244
 245 static void tps6586x_irq_disable(struct irq_data *irq_data)
 246 {
 247         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 248
 249         unsigned int __irq = irq_data->hwirq;
 250         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 251
 252         tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
 253         tps6586x->irq_en &= ~(1 << __irq);
 254 }
 255
 256 static void tps6586x_irq_sync_unlock(struct irq_data *data)
 257 {
 258         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 259         int i;
 260
 261         for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
 262                 int ret;
 263                 ret = tps6586x_write(tps6586x->dev,
 264                                             TPS6586X_INT_MASK1 + i,
 265                                             tps6586x->mask_reg[i]);
 266                 WARN_ON(ret);
 267         }
 268
 269         mutex_unlock(&tps6586x->irq_lock);
 270 }
 271
 272 #ifdef CONFIG_PM_SLEEP
 273 static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
 274 {
 275         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 276         return irq_set_irq_wake(tps6586x->irq, on);
 277 }
 278 #else
 279 #define tps6586x_irq_set_wake NULL
 280 #endif
 281
 282 static struct irq_chip tps6586x_irq_chip = {
 283         .name = "tps6586x",
 284         .irq_bus_lock = tps6586x_irq_lock,
 285         .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
 286         .irq_disable = tps6586x_irq_disable,
 287         .irq_enable = tps6586x_irq_enable,
 288         .irq_set_wake = tps6586x_irq_set_wake,
 289 };
 290
 291 static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
 292                                 irq_hw_number_t hw)
 293 {
 294         struct tps6586x *tps6586x = h->host_data;
 295
 296         irq_set_chip_data(virq, tps6586x);
 297         irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
 298         irq_set_nested_thread(virq, 1);
 299         irq_set_noprobe(virq);
 300
 301         return 0;
 302 }
 303
 304 static const struct irq_domain_ops tps6586x_domain_ops = {
 305         .map    = tps6586x_irq_map,
 306         .xlate  = irq_domain_xlate_twocell,
 307 };
 308
 309 static irqreturn_t tps6586x_irq(int irq, void *data)
 310 {
 311         struct tps6586x *tps6586x = data;
 312         uint32_t acks;
 313         __le32 val;
 314         int ret = 0;
 315
 316         ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
 317                              sizeof(acks), (uint8_t *)&val);
 318
 319         if (ret < 0) {
 320                 dev_err(tps6586x->dev, "failed to read interrupt status\n");
 321                 return IRQ_NONE;
 322         }
 323
 324         acks = le32_to_cpu(val);
 325
 326         while (acks) {
 327                 int i = __ffs(acks);
 328
 329                 if (tps6586x->irq_en & (1 << i))
 330                         handle_nested_irq(
 331                                 irq_find_mapping(tps6586x->irq_domain, i));
 332
 333                 acks &= ~(1 << i);
 334         }
 335
 336         return IRQ_HANDLED;
 337 }
 338
 339 static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 340                                        int irq_base)
 341 {
 342         int i, ret;
 343         u8 tmp[4];
 344         int new_irq_base;
 345         int irq_num = ARRAY_SIZE(tps6586x_irqs);
 346
 347         tps6586x->irq = irq;
 348
 349         mutex_init(&tps6586x->irq_lock);
 350         for (i = 0; i < 5; i++) {
 351                 tps6586x->mask_reg[i] = 0xff;
 352                 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
 353         }
 354
 355         tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
 356
 357         if  (irq_base > 0) {
 358                 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
 359                 if (new_irq_base < 0) {
 360                         dev_err(tps6586x->dev,
 361                                 "Failed to alloc IRQs: %d\n", new_irq_base);
 362                         return new_irq_base;
 363                 }
 364         } else {
 365                 new_irq_base = 0;
 366         }
 367
 368         tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
 369                                 irq_num, new_irq_base, &tps6586x_domain_ops,
 370                                 tps6586x);
 371         if (!tps6586x->irq_domain) {
 372                 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
 373                 return -ENOMEM;
 374         }
 375         ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
 376                                    "tps6586x", tps6586x);
 377
 378         if (!ret)
 379                 device_init_wakeup(tps6586x->dev, 1);
 380
 381         return ret;
 382 }
 383
 384 static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
 385                                           struct tps6586x_platform_data *pdata)
 386 {
 387         struct tps6586x_subdev_info *subdev;
 388         struct platform_device *pdev;
 389         int i, ret = 0;
 390
 391         for (i = 0; i < pdata->num_subdevs; i++) {
 392                 subdev = &pdata->subdevs[i];
 393
 394                 pdev = platform_device_alloc(subdev->name, subdev->id);
 395                 if (!pdev) {
 396                         ret = -ENOMEM;
 397                         goto failed;
 398                 }
 399
 400                 pdev->dev.parent = tps6586x->dev;
 401                 pdev->dev.platform_data = subdev->platform_data;
 402                 pdev->dev.of_node = subdev->of_node;
 403
 404                 ret = platform_device_add(pdev);
 405                 if (ret) {
 406                         platform_device_put(pdev);
 407                         goto failed;
 408                 }
 409         }
 410         return 0;
 411
 412 failed:
 413         tps6586x_remove_subdevs(tps6586x);
 414         return ret;
 415 }
 416
 417 #ifdef CONFIG_OF
 418 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 419 {
 420         struct device_node *np = client->dev.of_node;
 421         struct tps6586x_platform_data *pdata;
 422
 423         pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
 424         if (!pdata)
 425                 return NULL;
 426
 427         pdata->num_subdevs = 0;
 428         pdata->subdevs = NULL;
 429         pdata->gpio_base = -1;
 430         pdata->irq_base = -1;
 431         pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
 432
 433         return pdata;
 434 }
 435
 436 static const struct of_device_id tps6586x_of_match[] = {
 437         { .compatible = "ti,tps6586x", },
 438         { },
 439 };
 440 #else
 441 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 442 {
 443         return NULL;
 444 }
 445 #endif
 446
 447 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 448 {
 449         /* Cache all interrupt mask register */
 450         if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
 451                 return false;
 452
 453         return true;
 454 }
 455
 456 static const struct regmap_config tps6586x_regmap_config = {
 457         .reg_bits = 8,
 458         .val_bits = 8,
 459         .max_register = TPS6586X_MAX_REGISTER,
 460         .volatile_reg = is_volatile_reg,
 461         .cache_type = REGCACHE_RBTREE,
 462 };
 463
 464 static struct device *tps6586x_dev;
 465 static void tps6586x_power_off(void)
 466 {
 467         if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
 468                 return;
 469
 470         tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
 471 }
 472
 473 static void tps6586x_print_version(struct i2c_client *client, int version)
 474 {
 475         const char *name;
 476
 477         switch (version) {
 478         case TPS658621A:
 479                 name = "TPS658621A";
 480                 break;
 481         case TPS658621CD:
 482                 name = "TPS658621C/D";
 483                 break;
 484         case TPS658623:
 485                 name = "TPS658623";
 486                 break;
 487         case TPS658640:
 488         case TPS658640v2:
 489                 name = "TPS658640";
 490                 break;
 491         case TPS658643:
 492                 name = "TPS658643";
 493                 break;
 494         default:
 495                 name = "TPS6586X";
 496                 break;
 497         }
 498
 499         dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
 500 }
 501
 502 static int tps6586x_i2c_probe(struct i2c_client *client,
 503                                         const struct i2c_device_id *id)
 504 {
 505         struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
 506         struct tps6586x *tps6586x;
 507         int ret;
 508         int version;
 509
 510         if (!pdata && client->dev.of_node)
 511                 pdata = tps6586x_parse_dt(client);
 512
 513         if (!pdata) {
 514                 dev_err(&client->dev, "tps6586x requires platform data\n");
 515                 return -ENOTSUPP;
 516         }
 517
 518         version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
 519         if (version < 0) {
 520                 dev_err(&client->dev, "Chip ID read failed: %d\n", version);
 521                 return -EIO;
 522         }
 523
 524         tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
 525         if (!tps6586x)
 526                 return -ENOMEM;
 527
 528         tps6586x->version = version;
 529         tps6586x_print_version(client, tps6586x->version);
 530
 531         tps6586x->client = client;
 532         tps6586x->dev = &client->dev;
 533         i2c_set_clientdata(client, tps6586x);
 534
 535         tps6586x->regmap = devm_regmap_init_i2c(client,
 536                                         &tps6586x_regmap_config);
 537         if (IS_ERR(tps6586x->regmap)) {
 538                 ret = PTR_ERR(tps6586x->regmap);
 539                 dev_err(&client->dev, "regmap init failed: %d\n", ret);
 540                 return ret;
 541         }
 542
 543
 544         if (client->irq) {
 545                 ret = tps6586x_irq_init(tps6586x, client->irq,
 546                                         pdata->irq_base);
 547                 if (ret) {
 548                         dev_err(&client->dev, "IRQ init failed: %d\n", ret);
 549                         return ret;
 550                 }
 551         }
 552
 553         ret = mfd_add_devices(tps6586x->dev, -1,
 554                               tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
 555                               NULL, 0, tps6586x->irq_domain);
 556         if (ret < 0) {
 557                 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
 558                 goto err_mfd_add;
 559         }
 560
 561         ret = tps6586x_add_subdevs(tps6586x, pdata);
 562         if (ret) {
 563                 dev_err(&client->dev, "add devices failed: %d\n", ret);
 564                 goto err_add_devs;
 565         }
 566
 567         if (pdata->pm_off && !pm_power_off) {
 568                 tps6586x_dev = &client->dev;
 569                 pm_power_off = tps6586x_power_off;
 570         }
 571
 572         return 0;
 573
 574 err_add_devs:
 575         mfd_remove_devices(tps6586x->dev);
 576 err_mfd_add:
 577         if (client->irq)
 578                 free_irq(client->irq, tps6586x);
 579         return ret;
 580 }
 581
 582 static int tps6586x_i2c_remove(struct i2c_client *client)
 583 {
 584         struct tps6586x *tps6586x = i2c_get_clientdata(client);
 585
 586         tps6586x_remove_subdevs(tps6586x);
 587         mfd_remove_devices(tps6586x->dev);
 588         if (client->irq)
 589                 free_irq(client->irq, tps6586x);
 590         return 0;
 591 }
 592
 593 static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
 594 {
 595         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 596
 597         if (tps6586x->client->irq)
 598                 disable_irq(tps6586x->client->irq);
 599
 600         return 0;
 601 }
 602
 603 static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
 604 {
 605         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 606
 607         if (tps6586x->client->irq)
 608                 enable_irq(tps6586x->client->irq);
 609
 610         return 0;
 611 }
 612
 613 static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
 614                          tps6586x_i2c_resume);
 615
 616 static const struct i2c_device_id tps6586x_id_table[] = {
 617         { "tps6586x", 0 },
 618         { },
 619 };
 620 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
 621
 622 static struct i2c_driver tps6586x_driver = {
 623         .driver = {
 624                 .name   = "tps6586x",
 625                 .of_match_table = of_match_ptr(tps6586x_of_match),
 626                 .pm     = &tps6586x_pm_ops,
 627         },
 628         .probe          = tps6586x_i2c_probe,
 629         .remove         = tps6586x_i2c_remove,
 630         .id_table       = tps6586x_id_table,
 631 };
 632
 633 static int __init tps6586x_init(void)
 634 {
 635         return i2c_add_driver(&tps6586x_driver);
 636 }
 637 subsys_initcall(tps6586x_init);
 638
 639 static void __exit tps6586x_exit(void)
 640 {
 641         i2c_del_driver(&tps6586x_driver);
 642 }
 643 module_exit(tps6586x_exit);
 644
 645 MODULE_DESCRIPTION("TPS6586X core driver");
 646 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
 647 MODULE_LICENSE("GPL");