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 const 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 static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
 273 {
 274         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 275         return irq_set_irq_wake(tps6586x->irq, on);
 276 }
 277
 278 static struct irq_chip tps6586x_irq_chip = {
 279         .name = "tps6586x",
 280         .irq_bus_lock = tps6586x_irq_lock,
 281         .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
 282         .irq_disable = tps6586x_irq_disable,
 283         .irq_enable = tps6586x_irq_enable,
 284         .irq_set_wake = pm_sleep_ptr(tps6586x_irq_set_wake),
 285 };
 286
 287 static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
 288                                 irq_hw_number_t hw)
 289 {
 290         struct tps6586x *tps6586x = h->host_data;
 291
 292         irq_set_chip_data(virq, tps6586x);
 293         irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
 294         irq_set_nested_thread(virq, 1);
 295         irq_set_noprobe(virq);
 296
 297         return 0;
 298 }
 299
 300 static const struct irq_domain_ops tps6586x_domain_ops = {
 301         .map    = tps6586x_irq_map,
 302         .xlate  = irq_domain_xlate_twocell,
 303 };
 304
 305 static irqreturn_t tps6586x_irq(int irq, void *data)
 306 {
 307         struct tps6586x *tps6586x = data;
 308         uint32_t acks;
 309         __le32 val;
 310         int ret = 0;
 311
 312         ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
 313                              sizeof(acks), (uint8_t *)&val);
 314
 315         if (ret < 0) {
 316                 dev_err(tps6586x->dev, "failed to read interrupt status\n");
 317                 return IRQ_NONE;
 318         }
 319
 320         acks = le32_to_cpu(val);
 321
 322         while (acks) {
 323                 int i = __ffs(acks);
 324
 325                 if (tps6586x->irq_en & (1 << i))
 326                         handle_nested_irq(
 327                                 irq_find_mapping(tps6586x->irq_domain, i));
 328
 329                 acks &= ~(1 << i);
 330         }
 331
 332         return IRQ_HANDLED;
 333 }
 334
 335 static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 336                                        int irq_base)
 337 {
 338         int i, ret;
 339         u8 tmp[4];
 340         int new_irq_base;
 341         int irq_num = ARRAY_SIZE(tps6586x_irqs);
 342
 343         tps6586x->irq = irq;
 344
 345         mutex_init(&tps6586x->irq_lock);
 346         for (i = 0; i < 5; i++) {
 347                 tps6586x->mask_reg[i] = 0xff;
 348                 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
 349         }
 350
 351         tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
 352
 353         if  (irq_base > 0) {
 354                 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
 355                 if (new_irq_base < 0) {
 356                         dev_err(tps6586x->dev,
 357                                 "Failed to alloc IRQs: %d\n", new_irq_base);
 358                         return new_irq_base;
 359                 }
 360         } else {
 361                 new_irq_base = 0;
 362         }
 363
 364         tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
 365                                 irq_num, new_irq_base, &tps6586x_domain_ops,
 366                                 tps6586x);
 367         if (!tps6586x->irq_domain) {
 368                 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
 369                 return -ENOMEM;
 370         }
 371         ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
 372                                    "tps6586x", tps6586x);
 373
 374         if (!ret)
 375                 device_init_wakeup(tps6586x->dev, 1);
 376
 377         return ret;
 378 }
 379
 380 static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
 381                                           struct tps6586x_platform_data *pdata)
 382 {
 383         struct tps6586x_subdev_info *subdev;
 384         struct platform_device *pdev;
 385         int i, ret = 0;
 386
 387         for (i = 0; i < pdata->num_subdevs; i++) {
 388                 subdev = &pdata->subdevs[i];
 389
 390                 pdev = platform_device_alloc(subdev->name, subdev->id);
 391                 if (!pdev) {
 392                         ret = -ENOMEM;
 393                         goto failed;
 394                 }
 395
 396                 pdev->dev.parent = tps6586x->dev;
 397                 pdev->dev.platform_data = subdev->platform_data;
 398                 pdev->dev.of_node = subdev->of_node;
 399
 400                 ret = platform_device_add(pdev);
 401                 if (ret) {
 402                         platform_device_put(pdev);
 403                         goto failed;
 404                 }
 405         }
 406         return 0;
 407
 408 failed:
 409         tps6586x_remove_subdevs(tps6586x);
 410         return ret;
 411 }
 412
 413 #ifdef CONFIG_OF
 414 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 415 {
 416         struct device_node *np = client->dev.of_node;
 417         struct tps6586x_platform_data *pdata;
 418
 419         pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
 420         if (!pdata)
 421                 return NULL;
 422
 423         pdata->num_subdevs = 0;
 424         pdata->subdevs = NULL;
 425         pdata->gpio_base = -1;
 426         pdata->irq_base = -1;
 427         pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
 428
 429         return pdata;
 430 }
 431
 432 static const struct of_device_id tps6586x_of_match[] = {
 433         { .compatible = "ti,tps6586x", },
 434         { },
 435 };
 436 #else
 437 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 438 {
 439         return NULL;
 440 }
 441 #endif
 442
 443 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 444 {
 445         /* Cache all interrupt mask register */
 446         if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
 447                 return false;
 448
 449         return true;
 450 }
 451
 452 static const struct regmap_config tps6586x_regmap_config = {
 453         .reg_bits = 8,
 454         .val_bits = 8,
 455         .max_register = TPS6586X_MAX_REGISTER,
 456         .volatile_reg = is_volatile_reg,
 457         .cache_type = REGCACHE_RBTREE,
 458 };
 459
 460 static struct device *tps6586x_dev;
 461 static void tps6586x_power_off(void)
 462 {
 463         if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
 464                 return;
 465
 466         tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
 467 }
 468
 469 static void tps6586x_print_version(struct i2c_client *client, int version)
 470 {
 471         const char *name;
 472
 473         switch (version) {
 474         case TPS658621A:
 475                 name = "TPS658621A";
 476                 break;
 477         case TPS658621CD:
 478                 name = "TPS658621C/D";
 479                 break;
 480         case TPS658623:
 481                 name = "TPS658623";
 482                 break;
 483         case TPS658640:
 484         case TPS658640v2:
 485                 name = "TPS658640";
 486                 break;
 487         case TPS658643:
 488                 name = "TPS658643";
 489                 break;
 490         default:
 491                 name = "TPS6586X";
 492                 break;
 493         }
 494
 495         dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
 496 }
 497
 498 static int tps6586x_i2c_probe(struct i2c_client *client)
 499 {
 500         struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
 501         struct tps6586x *tps6586x;
 502         int ret;
 503         int version;
 504
 505         if (!pdata && client->dev.of_node)
 506                 pdata = tps6586x_parse_dt(client);
 507
 508         if (!pdata) {
 509                 dev_err(&client->dev, "tps6586x requires platform data\n");
 510                 return -ENOTSUPP;
 511         }
 512
 513         version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
 514         if (version < 0) {
 515                 dev_err(&client->dev, "Chip ID read failed: %d\n", version);
 516                 return -EIO;
 517         }
 518
 519         tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
 520         if (!tps6586x)
 521                 return -ENOMEM;
 522
 523         tps6586x->version = version;
 524         tps6586x_print_version(client, tps6586x->version);
 525
 526         tps6586x->client = client;
 527         tps6586x->dev = &client->dev;
 528         i2c_set_clientdata(client, tps6586x);
 529
 530         tps6586x->regmap = devm_regmap_init_i2c(client,
 531                                         &tps6586x_regmap_config);
 532         if (IS_ERR(tps6586x->regmap)) {
 533                 ret = PTR_ERR(tps6586x->regmap);
 534                 dev_err(&client->dev, "regmap init failed: %d\n", ret);
 535                 return ret;
 536         }
 537
 538
 539         if (client->irq) {
 540                 ret = tps6586x_irq_init(tps6586x, client->irq,
 541                                         pdata->irq_base);
 542                 if (ret) {
 543                         dev_err(&client->dev, "IRQ init failed: %d\n", ret);
 544                         return ret;
 545                 }
 546         }
 547
 548         ret = mfd_add_devices(tps6586x->dev, -1,
 549                               tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
 550                               NULL, 0, tps6586x->irq_domain);
 551         if (ret < 0) {
 552                 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
 553                 goto err_mfd_add;
 554         }
 555
 556         ret = tps6586x_add_subdevs(tps6586x, pdata);
 557         if (ret) {
 558                 dev_err(&client->dev, "add devices failed: %d\n", ret);
 559                 goto err_add_devs;
 560         }
 561
 562         if (pdata->pm_off && !pm_power_off) {
 563                 tps6586x_dev = &client->dev;
 564                 pm_power_off = tps6586x_power_off;
 565         }
 566
 567         return 0;
 568
 569 err_add_devs:
 570         mfd_remove_devices(tps6586x->dev);
 571 err_mfd_add:
 572         if (client->irq)
 573                 free_irq(client->irq, tps6586x);
 574         return ret;
 575 }
 576
 577 static void tps6586x_i2c_remove(struct i2c_client *client)
 578 {
 579         struct tps6586x *tps6586x = i2c_get_clientdata(client);
 580
 581         tps6586x_remove_subdevs(tps6586x);
 582         mfd_remove_devices(tps6586x->dev);
 583         if (client->irq)
 584                 free_irq(client->irq, tps6586x);
 585 }
 586
 587 static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
 588 {
 589         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 590
 591         if (tps6586x->client->irq)
 592                 disable_irq(tps6586x->client->irq);
 593
 594         return 0;
 595 }
 596
 597 static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
 598 {
 599         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 600
 601         if (tps6586x->client->irq)
 602                 enable_irq(tps6586x->client->irq);
 603
 604         return 0;
 605 }
 606
 607 static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
 608                          tps6586x_i2c_resume);
 609
 610 static const struct i2c_device_id tps6586x_id_table[] = {
 611         { "tps6586x", 0 },
 612         { },
 613 };
 614 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
 615
 616 static struct i2c_driver tps6586x_driver = {
 617         .driver = {
 618                 .name   = "tps6586x",
 619                 .of_match_table = of_match_ptr(tps6586x_of_match),
 620                 .pm     = &tps6586x_pm_ops,
 621         },
 622         .probe          = tps6586x_i2c_probe,
 623         .remove         = tps6586x_i2c_remove,
 624         .id_table       = tps6586x_id_table,
 625 };
 626
 627 static int __init tps6586x_init(void)
 628 {
 629         return i2c_add_driver(&tps6586x_driver);
 630 }
 631 subsys_initcall(tps6586x_init);
 632
 633 static void __exit tps6586x_exit(void)
 634 {
 635         i2c_del_driver(&tps6586x_driver);
 636 }
 637 module_exit(tps6586x_exit);
 638
 639 MODULE_DESCRIPTION("TPS6586X core driver");
 640 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");