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/reboot.h>
  26 #include <linux/regmap.h>
  27 #include <linux/of.h>
  28
  29 #include <linux/mfd/core.h>
  30 #include <linux/mfd/tps6586x.h>
  31
  32 #define TPS6586X_SUPPLYENE      0x14
  33 #define SOFT_RST_BIT            BIT(0)
  34 #define EXITSLREQ_BIT           BIT(1)
  35 #define SLEEP_MODE_BIT          BIT(3)
  36
  37 /* interrupt control registers */
  38 #define TPS6586X_INT_ACK1       0xb5
  39 #define TPS6586X_INT_ACK2       0xb6
  40 #define TPS6586X_INT_ACK3       0xb7
  41 #define TPS6586X_INT_ACK4       0xb8
  42
  43 /* interrupt mask registers */
  44 #define TPS6586X_INT_MASK1      0xb0
  45 #define TPS6586X_INT_MASK2      0xb1
  46 #define TPS6586X_INT_MASK3      0xb2
  47 #define TPS6586X_INT_MASK4      0xb3
  48 #define TPS6586X_INT_MASK5      0xb4
  49
  50 /* device id */
  51 #define TPS6586X_VERSIONCRC     0xcd
  52
  53 /* Maximum register */
  54 #define TPS6586X_MAX_REGISTER   TPS6586X_VERSIONCRC
  55
  56 struct tps6586x_irq_data {
  57         u8      mask_reg;
  58         u8      mask_mask;
  59 };
  60
  61 #define TPS6586X_IRQ(_reg, _mask)                               \
  62         {                                                       \
  63                 .mask_reg = (_reg) - TPS6586X_INT_MASK1,        \
  64                 .mask_mask = (_mask),                           \
  65         }
  66
  67 static const struct tps6586x_irq_data tps6586x_irqs[] = {
  68         [TPS6586X_INT_PLDO_0]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 0),
  69         [TPS6586X_INT_PLDO_1]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 1),
  70         [TPS6586X_INT_PLDO_2]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 2),
  71         [TPS6586X_INT_PLDO_3]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 3),
  72         [TPS6586X_INT_PLDO_4]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 4),
  73         [TPS6586X_INT_PLDO_5]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 5),
  74         [TPS6586X_INT_PLDO_6]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 6),
  75         [TPS6586X_INT_PLDO_7]   = TPS6586X_IRQ(TPS6586X_INT_MASK1, 1 << 7),
  76         [TPS6586X_INT_COMP_DET] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 0),
  77         [TPS6586X_INT_ADC]      = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 1),
  78         [TPS6586X_INT_PLDO_8]   = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 2),
  79         [TPS6586X_INT_PLDO_9]   = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 3),
  80         [TPS6586X_INT_PSM_0]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 4),
  81         [TPS6586X_INT_PSM_1]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 5),
  82         [TPS6586X_INT_PSM_2]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 6),
  83         [TPS6586X_INT_PSM_3]    = TPS6586X_IRQ(TPS6586X_INT_MASK2, 1 << 7),
  84         [TPS6586X_INT_RTC_ALM1] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 4),
  85         [TPS6586X_INT_ACUSB_OVP] = TPS6586X_IRQ(TPS6586X_INT_MASK5, 0x03),
  86         [TPS6586X_INT_USB_DET]  = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 2),
  87         [TPS6586X_INT_AC_DET]   = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 3),
  88         [TPS6586X_INT_BAT_DET]  = TPS6586X_IRQ(TPS6586X_INT_MASK3, 1 << 0),
  89         [TPS6586X_INT_CHG_STAT] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 0xfc),
  90         [TPS6586X_INT_CHG_TEMP] = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0x06),
  91         [TPS6586X_INT_PP]       = TPS6586X_IRQ(TPS6586X_INT_MASK3, 0xf0),
  92         [TPS6586X_INT_RESUME]   = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 5),
  93         [TPS6586X_INT_LOW_SYS]  = TPS6586X_IRQ(TPS6586X_INT_MASK5, 1 << 6),
  94         [TPS6586X_INT_RTC_ALM2] = TPS6586X_IRQ(TPS6586X_INT_MASK4, 1 << 1),
  95 };
  96
  97 static const struct resource tps6586x_rtc_resources[] = {
  98         {
  99                 .start  = TPS6586X_INT_RTC_ALM1,
 100                 .end    = TPS6586X_INT_RTC_ALM1,
 101                 .flags  = IORESOURCE_IRQ,
 102         },
 103 };
 104
 105 static const struct mfd_cell tps6586x_cell[] = {
 106         {
 107                 .name = "tps6586x-gpio",
 108         },
 109         {
 110                 .name = "tps6586x-regulator",
 111         },
 112         {
 113                 .name = "tps6586x-rtc",
 114                 .num_resources = ARRAY_SIZE(tps6586x_rtc_resources),
 115                 .resources = &tps6586x_rtc_resources[0],
 116         },
 117         {
 118                 .name = "tps6586x-onkey",
 119         },
 120 };
 121
 122 struct tps6586x {
 123         struct device           *dev;
 124         struct i2c_client       *client;
 125         struct regmap           *regmap;
 126         int                     version;
 127
 128         int                     irq;
 129         struct irq_chip         irq_chip;
 130         struct mutex            irq_lock;
 131         int                     irq_base;
 132         u32                     irq_en;
 133         u8                      mask_reg[5];
 134         struct irq_domain       *irq_domain;
 135 };
 136
 137 static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
 138 {
 139         return i2c_get_clientdata(to_i2c_client(dev));
 140 }
 141
 142 int tps6586x_write(struct device *dev, int reg, uint8_t val)
 143 {
 144         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 145
 146         return regmap_write(tps6586x->regmap, reg, val);
 147 }
 148 EXPORT_SYMBOL_GPL(tps6586x_write);
 149
 150 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
 151 {
 152         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 153
 154         return regmap_bulk_write(tps6586x->regmap, reg, val, len);
 155 }
 156 EXPORT_SYMBOL_GPL(tps6586x_writes);
 157
 158 int tps6586x_read(struct device *dev, int reg, uint8_t *val)
 159 {
 160         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 161         unsigned int rval;
 162         int ret;
 163
 164         ret = regmap_read(tps6586x->regmap, reg, &rval);
 165         if (!ret)
 166                 *val = rval;
 167         return ret;
 168 }
 169 EXPORT_SYMBOL_GPL(tps6586x_read);
 170
 171 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
 172 {
 173         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 174
 175         return regmap_bulk_read(tps6586x->regmap, reg, val, len);
 176 }
 177 EXPORT_SYMBOL_GPL(tps6586x_reads);
 178
 179 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
 180 {
 181         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 182
 183         return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
 184 }
 185 EXPORT_SYMBOL_GPL(tps6586x_set_bits);
 186
 187 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
 188 {
 189         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 190
 191         return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
 192 }
 193 EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
 194
 195 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
 196 {
 197         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 198
 199         return regmap_update_bits(tps6586x->regmap, reg, mask, val);
 200 }
 201 EXPORT_SYMBOL_GPL(tps6586x_update);
 202
 203 int tps6586x_irq_get_virq(struct device *dev, int irq)
 204 {
 205         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 206
 207         return irq_create_mapping(tps6586x->irq_domain, irq);
 208 }
 209 EXPORT_SYMBOL_GPL(tps6586x_irq_get_virq);
 210
 211 int tps6586x_get_version(struct device *dev)
 212 {
 213         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 214
 215         return tps6586x->version;
 216 }
 217 EXPORT_SYMBOL_GPL(tps6586x_get_version);
 218
 219 static int __remove_subdev(struct device *dev, void *unused)
 220 {
 221         platform_device_unregister(to_platform_device(dev));
 222         return 0;
 223 }
 224
 225 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
 226 {
 227         return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
 228 }
 229
 230 static void tps6586x_irq_lock(struct irq_data *data)
 231 {
 232         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 233
 234         mutex_lock(&tps6586x->irq_lock);
 235 }
 236
 237 static void tps6586x_irq_enable(struct irq_data *irq_data)
 238 {
 239         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 240         unsigned int __irq = irq_data->hwirq;
 241         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 242
 243         tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
 244         tps6586x->irq_en |= (1 << __irq);
 245 }
 246
 247 static void tps6586x_irq_disable(struct irq_data *irq_data)
 248 {
 249         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 250
 251         unsigned int __irq = irq_data->hwirq;
 252         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 253
 254         tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
 255         tps6586x->irq_en &= ~(1 << __irq);
 256 }
 257
 258 static void tps6586x_irq_sync_unlock(struct irq_data *data)
 259 {
 260         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 261         int i;
 262
 263         for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
 264                 int ret;
 265                 ret = tps6586x_write(tps6586x->dev,
 266                                             TPS6586X_INT_MASK1 + i,
 267                                             tps6586x->mask_reg[i]);
 268                 WARN_ON(ret);
 269         }
 270
 271         mutex_unlock(&tps6586x->irq_lock);
 272 }
 273
 274 static int tps6586x_irq_set_wake(struct irq_data *irq_data, unsigned int on)
 275 {
 276         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 277         return irq_set_irq_wake(tps6586x->irq, on);
 278 }
 279
 280 static struct irq_chip tps6586x_irq_chip = {
 281         .name = "tps6586x",
 282         .irq_bus_lock = tps6586x_irq_lock,
 283         .irq_bus_sync_unlock = tps6586x_irq_sync_unlock,
 284         .irq_disable = tps6586x_irq_disable,
 285         .irq_enable = tps6586x_irq_enable,
 286         .irq_set_wake = pm_sleep_ptr(tps6586x_irq_set_wake),
 287 };
 288
 289 static int tps6586x_irq_map(struct irq_domain *h, unsigned int virq,
 290                                 irq_hw_number_t hw)
 291 {
 292         struct tps6586x *tps6586x = h->host_data;
 293
 294         irq_set_chip_data(virq, tps6586x);
 295         irq_set_chip_and_handler(virq, &tps6586x_irq_chip, handle_simple_irq);
 296         irq_set_nested_thread(virq, 1);
 297         irq_set_noprobe(virq);
 298
 299         return 0;
 300 }
 301
 302 static const struct irq_domain_ops tps6586x_domain_ops = {
 303         .map    = tps6586x_irq_map,
 304         .xlate  = irq_domain_xlate_twocell,
 305 };
 306
 307 static irqreturn_t tps6586x_irq(int irq, void *data)
 308 {
 309         struct tps6586x *tps6586x = data;
 310         uint32_t acks;
 311         __le32 val;
 312         int ret = 0;
 313
 314         ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
 315                              sizeof(acks), (uint8_t *)&val);
 316
 317         if (ret < 0) {
 318                 dev_err(tps6586x->dev, "failed to read interrupt status\n");
 319                 return IRQ_NONE;
 320         }
 321
 322         acks = le32_to_cpu(val);
 323
 324         while (acks) {
 325                 int i = __ffs(acks);
 326
 327                 if (tps6586x->irq_en & (1 << i))
 328                         handle_nested_irq(
 329                                 irq_find_mapping(tps6586x->irq_domain, i));
 330
 331                 acks &= ~(1 << i);
 332         }
 333
 334         return IRQ_HANDLED;
 335 }
 336
 337 static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 338                                        int irq_base)
 339 {
 340         int i, ret;
 341         u8 tmp[4];
 342         int new_irq_base;
 343         int irq_num = ARRAY_SIZE(tps6586x_irqs);
 344
 345         tps6586x->irq = irq;
 346
 347         mutex_init(&tps6586x->irq_lock);
 348         for (i = 0; i < 5; i++) {
 349                 tps6586x->mask_reg[i] = 0xff;
 350                 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
 351         }
 352
 353         tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
 354
 355         if  (irq_base > 0) {
 356                 new_irq_base = irq_alloc_descs(irq_base, 0, irq_num, -1);
 357                 if (new_irq_base < 0) {
 358                         dev_err(tps6586x->dev,
 359                                 "Failed to alloc IRQs: %d\n", new_irq_base);
 360                         return new_irq_base;
 361                 }
 362         } else {
 363                 new_irq_base = 0;
 364         }
 365
 366         tps6586x->irq_domain = irq_domain_add_simple(tps6586x->dev->of_node,
 367                                 irq_num, new_irq_base, &tps6586x_domain_ops,
 368                                 tps6586x);
 369         if (!tps6586x->irq_domain) {
 370                 dev_err(tps6586x->dev, "Failed to create IRQ domain\n");
 371                 return -ENOMEM;
 372         }
 373         ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
 374                                    "tps6586x", tps6586x);
 375
 376         if (!ret)
 377                 device_init_wakeup(tps6586x->dev, 1);
 378
 379         return ret;
 380 }
 381
 382 static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
 383                                           struct tps6586x_platform_data *pdata)
 384 {
 385         struct tps6586x_subdev_info *subdev;
 386         struct platform_device *pdev;
 387         int i, ret = 0;
 388
 389         for (i = 0; i < pdata->num_subdevs; i++) {
 390                 subdev = &pdata->subdevs[i];
 391
 392                 pdev = platform_device_alloc(subdev->name, subdev->id);
 393                 if (!pdev) {
 394                         ret = -ENOMEM;
 395                         goto failed;
 396                 }
 397
 398                 pdev->dev.parent = tps6586x->dev;
 399                 pdev->dev.platform_data = subdev->platform_data;
 400                 pdev->dev.of_node = subdev->of_node;
 401
 402                 ret = platform_device_add(pdev);
 403                 if (ret) {
 404                         platform_device_put(pdev);
 405                         goto failed;
 406                 }
 407         }
 408         return 0;
 409
 410 failed:
 411         tps6586x_remove_subdevs(tps6586x);
 412         return ret;
 413 }
 414
 415 #ifdef CONFIG_OF
 416 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 417 {
 418         struct device_node *np = client->dev.of_node;
 419         struct tps6586x_platform_data *pdata;
 420
 421         pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
 422         if (!pdata)
 423                 return NULL;
 424
 425         pdata->num_subdevs = 0;
 426         pdata->subdevs = NULL;
 427         pdata->gpio_base = -1;
 428         pdata->irq_base = -1;
 429         pdata->pm_off = of_property_read_bool(np, "ti,system-power-controller");
 430
 431         return pdata;
 432 }
 433
 434 static const struct of_device_id tps6586x_of_match[] = {
 435         { .compatible = "ti,tps6586x", },
 436         { },
 437 };
 438 #else
 439 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 440 {
 441         return NULL;
 442 }
 443 #endif
 444
 445 static bool is_volatile_reg(struct device *dev, unsigned int reg)
 446 {
 447         /* Cache all interrupt mask register */
 448         if ((reg >= TPS6586X_INT_MASK1) && (reg <= TPS6586X_INT_MASK5))
 449                 return false;
 450
 451         return true;
 452 }
 453
 454 static const struct regmap_config tps6586x_regmap_config = {
 455         .reg_bits = 8,
 456         .val_bits = 8,
 457         .max_register = TPS6586X_MAX_REGISTER,
 458         .volatile_reg = is_volatile_reg,
 459         .cache_type = REGCACHE_MAPLE,
 460 };
 461
 462 static int tps6586x_power_off_handler(struct sys_off_data *data)
 463 {
 464         int ret;
 465
 466         /* Put the PMIC into sleep state. This takes at least 20ms. */
 467         ret = tps6586x_clr_bits(data->dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT);
 468         if (ret)
 469                 return notifier_from_errno(ret);
 470
 471         ret = tps6586x_set_bits(data->dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
 472         if (ret)
 473                 return notifier_from_errno(ret);
 474
 475         mdelay(50);
 476         return notifier_from_errno(-ETIME);
 477 }
 478
 479 static int tps6586x_restart_handler(struct sys_off_data *data)
 480 {
 481         int ret;
 482
 483         /* Put the PMIC into hard reboot state. This takes at least 20ms. */
 484         ret = tps6586x_set_bits(data->dev, TPS6586X_SUPPLYENE, SOFT_RST_BIT);
 485         if (ret)
 486                 return notifier_from_errno(ret);
 487
 488         mdelay(50);
 489         return notifier_from_errno(-ETIME);
 490 }
 491
 492 static void tps6586x_print_version(struct i2c_client *client, int version)
 493 {
 494         const char *name;
 495
 496         switch (version) {
 497         case TPS658621A:
 498                 name = "TPS658621A";
 499                 break;
 500         case TPS658621CD:
 501                 name = "TPS658621C/D";
 502                 break;
 503         case TPS658623:
 504                 name = "TPS658623";
 505                 break;
 506         case TPS658640:
 507         case TPS658640v2:
 508                 name = "TPS658640";
 509                 break;
 510         case TPS658643:
 511                 name = "TPS658643";
 512                 break;
 513         default:
 514                 name = "TPS6586X";
 515                 break;
 516         }
 517
 518         dev_info(&client->dev, "Found %s, VERSIONCRC is %02x\n", name, version);
 519 }
 520
 521 static int tps6586x_i2c_probe(struct i2c_client *client)
 522 {
 523         struct tps6586x_platform_data *pdata = dev_get_platdata(&client->dev);
 524         struct tps6586x *tps6586x;
 525         int ret;
 526         int version;
 527
 528         if (!pdata && client->dev.of_node)
 529                 pdata = tps6586x_parse_dt(client);
 530
 531         if (!pdata) {
 532                 dev_err(&client->dev, "tps6586x requires platform data\n");
 533                 return -ENOTSUPP;
 534         }
 535
 536         version = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
 537         if (version < 0) {
 538                 dev_err(&client->dev, "Chip ID read failed: %d\n", version);
 539                 return -EIO;
 540         }
 541
 542         tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
 543         if (!tps6586x)
 544                 return -ENOMEM;
 545
 546         tps6586x->version = version;
 547         tps6586x_print_version(client, tps6586x->version);
 548
 549         tps6586x->client = client;
 550         tps6586x->dev = &client->dev;
 551         i2c_set_clientdata(client, tps6586x);
 552
 553         tps6586x->regmap = devm_regmap_init_i2c(client,
 554                                         &tps6586x_regmap_config);
 555         if (IS_ERR(tps6586x->regmap)) {
 556                 ret = PTR_ERR(tps6586x->regmap);
 557                 dev_err(&client->dev, "regmap init failed: %d\n", ret);
 558                 return ret;
 559         }
 560
 561
 562         if (client->irq) {
 563                 ret = tps6586x_irq_init(tps6586x, client->irq,
 564                                         pdata->irq_base);
 565                 if (ret) {
 566                         dev_err(&client->dev, "IRQ init failed: %d\n", ret);
 567                         return ret;
 568                 }
 569         }
 570
 571         ret = mfd_add_devices(tps6586x->dev, -1,
 572                               tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
 573                               NULL, 0, tps6586x->irq_domain);
 574         if (ret < 0) {
 575                 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
 576                 goto err_mfd_add;
 577         }
 578
 579         ret = tps6586x_add_subdevs(tps6586x, pdata);
 580         if (ret) {
 581                 dev_err(&client->dev, "add devices failed: %d\n", ret);
 582                 goto err_add_devs;
 583         }
 584
 585         if (pdata->pm_off) {
 586                 ret = devm_register_power_off_handler(&client->dev, &tps6586x_power_off_handler,
 587                                                       NULL);
 588                 if (ret) {
 589                         dev_err(&client->dev, "register power off handler failed: %d\n", ret);
 590                         goto err_add_devs;
 591                 }
 592
 593                 ret = devm_register_restart_handler(&client->dev, &tps6586x_restart_handler,
 594                                                     NULL);
 595                 if (ret) {
 596                         dev_err(&client->dev, "register restart handler failed: %d\n", ret);
 597                         goto err_add_devs;
 598                 }
 599         }
 600
 601         return 0;
 602
 603 err_add_devs:
 604         mfd_remove_devices(tps6586x->dev);
 605 err_mfd_add:
 606         if (client->irq)
 607                 free_irq(client->irq, tps6586x);
 608         return ret;
 609 }
 610
 611 static void tps6586x_i2c_remove(struct i2c_client *client)
 612 {
 613         struct tps6586x *tps6586x = i2c_get_clientdata(client);
 614
 615         tps6586x_remove_subdevs(tps6586x);
 616         mfd_remove_devices(tps6586x->dev);
 617         if (client->irq)
 618                 free_irq(client->irq, tps6586x);
 619 }
 620
 621 static int __maybe_unused tps6586x_i2c_suspend(struct device *dev)
 622 {
 623         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 624
 625         if (tps6586x->client->irq)
 626                 disable_irq(tps6586x->client->irq);
 627
 628         return 0;
 629 }
 630
 631 static int __maybe_unused tps6586x_i2c_resume(struct device *dev)
 632 {
 633         struct tps6586x *tps6586x = dev_get_drvdata(dev);
 634
 635         if (tps6586x->client->irq)
 636                 enable_irq(tps6586x->client->irq);
 637
 638         return 0;
 639 }
 640
 641 static SIMPLE_DEV_PM_OPS(tps6586x_pm_ops, tps6586x_i2c_suspend,
 642                          tps6586x_i2c_resume);
 643
 644 static const struct i2c_device_id tps6586x_id_table[] = {
 645         { "tps6586x", 0 },
 646         { },
 647 };
 648 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
 649
 650 static struct i2c_driver tps6586x_driver = {
 651         .driver = {
 652                 .name   = "tps6586x",
 653                 .of_match_table = of_match_ptr(tps6586x_of_match),
 654                 .pm     = &tps6586x_pm_ops,
 655         },
 656         .probe          = tps6586x_i2c_probe,
 657         .remove         = tps6586x_i2c_remove,
 658         .id_table       = tps6586x_id_table,
 659 };
 660
 661 static int __init tps6586x_init(void)
 662 {
 663         return i2c_add_driver(&tps6586x_driver);
 664 }
 665 subsys_initcall(tps6586x_init);
 666
 667 static void __exit tps6586x_exit(void)
 668 {
 669         i2c_del_driver(&tps6586x_driver);
 670 }
 671 module_exit(tps6586x_exit);
 672
 673 MODULE_DESCRIPTION("TPS6586X core driver");
 674 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");