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/err.h>
  25 #include <linux/i2c.h>
  26 #include <linux/regmap.h>
  27 #include <linux/regulator/of_regulator.h>
  28 #include <linux/regulator/machine.h>
  29
  30 #include <linux/mfd/core.h>
  31 #include <linux/mfd/tps6586x.h>
  32
  33 #define TPS6586X_SUPPLYENE      0x14
  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 + 1)
  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 struct mfd_cell tps6586x_cell[] = {
  98         {
  99                 .name = "tps6586x-gpio",
 100         },
 101         {
 102                 .name = "tps6586x-rtc",
 103         },
 104         {
 105                 .name = "tps6586x-onkey",
 106         },
 107 };
 108
 109 struct tps6586x {
 110         struct device           *dev;
 111         struct i2c_client       *client;
 112         struct regmap           *regmap;
 113
 114         struct irq_chip         irq_chip;
 115         struct mutex            irq_lock;
 116         int                     irq_base;
 117         u32                     irq_en;
 118         u8                      mask_reg[5];
 119 };
 120
 121 static inline struct tps6586x *dev_to_tps6586x(struct device *dev)
 122 {
 123         return i2c_get_clientdata(to_i2c_client(dev));
 124 }
 125
 126 int tps6586x_write(struct device *dev, int reg, uint8_t val)
 127 {
 128         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 129
 130         return regmap_write(tps6586x->regmap, reg, val);
 131 }
 132 EXPORT_SYMBOL_GPL(tps6586x_write);
 133
 134 int tps6586x_writes(struct device *dev, int reg, int len, uint8_t *val)
 135 {
 136         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 137
 138         return regmap_bulk_write(tps6586x->regmap, reg, val, len);
 139 }
 140 EXPORT_SYMBOL_GPL(tps6586x_writes);
 141
 142 int tps6586x_read(struct device *dev, int reg, uint8_t *val)
 143 {
 144         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 145         unsigned int rval;
 146         int ret;
 147
 148         ret = regmap_read(tps6586x->regmap, reg, &rval);
 149         if (!ret)
 150                 *val = rval;
 151         return ret;
 152 }
 153 EXPORT_SYMBOL_GPL(tps6586x_read);
 154
 155 int tps6586x_reads(struct device *dev, int reg, int len, uint8_t *val)
 156 {
 157         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 158
 159         return regmap_bulk_read(tps6586x->regmap, reg, val, len);
 160 }
 161 EXPORT_SYMBOL_GPL(tps6586x_reads);
 162
 163 int tps6586x_set_bits(struct device *dev, int reg, uint8_t bit_mask)
 164 {
 165         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 166
 167         return regmap_update_bits(tps6586x->regmap, reg, bit_mask, bit_mask);
 168 }
 169 EXPORT_SYMBOL_GPL(tps6586x_set_bits);
 170
 171 int tps6586x_clr_bits(struct device *dev, int reg, uint8_t bit_mask)
 172 {
 173         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 174
 175         return regmap_update_bits(tps6586x->regmap, reg, bit_mask, 0);
 176 }
 177 EXPORT_SYMBOL_GPL(tps6586x_clr_bits);
 178
 179 int tps6586x_update(struct device *dev, int reg, uint8_t val, uint8_t mask)
 180 {
 181         struct tps6586x *tps6586x = dev_to_tps6586x(dev);
 182
 183         return regmap_update_bits(tps6586x->regmap, reg, mask, val);
 184 }
 185 EXPORT_SYMBOL_GPL(tps6586x_update);
 186
 187 static int __remove_subdev(struct device *dev, void *unused)
 188 {
 189         platform_device_unregister(to_platform_device(dev));
 190         return 0;
 191 }
 192
 193 static int tps6586x_remove_subdevs(struct tps6586x *tps6586x)
 194 {
 195         return device_for_each_child(tps6586x->dev, NULL, __remove_subdev);
 196 }
 197
 198 static void tps6586x_irq_lock(struct irq_data *data)
 199 {
 200         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 201
 202         mutex_lock(&tps6586x->irq_lock);
 203 }
 204
 205 static void tps6586x_irq_enable(struct irq_data *irq_data)
 206 {
 207         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 208         unsigned int __irq = irq_data->irq - tps6586x->irq_base;
 209         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 210
 211         tps6586x->mask_reg[data->mask_reg] &= ~data->mask_mask;
 212         tps6586x->irq_en |= (1 << __irq);
 213 }
 214
 215 static void tps6586x_irq_disable(struct irq_data *irq_data)
 216 {
 217         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(irq_data);
 218
 219         unsigned int __irq = irq_data->irq - tps6586x->irq_base;
 220         const struct tps6586x_irq_data *data = &tps6586x_irqs[__irq];
 221
 222         tps6586x->mask_reg[data->mask_reg] |= data->mask_mask;
 223         tps6586x->irq_en &= ~(1 << __irq);
 224 }
 225
 226 static void tps6586x_irq_sync_unlock(struct irq_data *data)
 227 {
 228         struct tps6586x *tps6586x = irq_data_get_irq_chip_data(data);
 229         int i;
 230
 231         for (i = 0; i < ARRAY_SIZE(tps6586x->mask_reg); i++) {
 232                 int ret;
 233                 ret = tps6586x_write(tps6586x->dev,
 234                                             TPS6586X_INT_MASK1 + i,
 235                                             tps6586x->mask_reg[i]);
 236                 WARN_ON(ret);
 237         }
 238
 239         mutex_unlock(&tps6586x->irq_lock);
 240 }
 241
 242 static irqreturn_t tps6586x_irq(int irq, void *data)
 243 {
 244         struct tps6586x *tps6586x = data;
 245         u32 acks;
 246         int ret = 0;
 247
 248         ret = tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1,
 249                              sizeof(acks), (uint8_t *)&acks);
 250
 251         if (ret < 0) {
 252                 dev_err(tps6586x->dev, "failed to read interrupt status\n");
 253                 return IRQ_NONE;
 254         }
 255
 256         acks = le32_to_cpu(acks);
 257
 258         while (acks) {
 259                 int i = __ffs(acks);
 260
 261                 if (tps6586x->irq_en & (1 << i))
 262                         handle_nested_irq(tps6586x->irq_base + i);
 263
 264                 acks &= ~(1 << i);
 265         }
 266
 267         return IRQ_HANDLED;
 268 }
 269
 270 static int tps6586x_irq_init(struct tps6586x *tps6586x, int irq,
 271                                        int irq_base)
 272 {
 273         int i, ret;
 274         u8 tmp[4];
 275
 276         if (!irq_base) {
 277                 dev_warn(tps6586x->dev, "No interrupt support on IRQ base\n");
 278                 return -EINVAL;
 279         }
 280
 281         mutex_init(&tps6586x->irq_lock);
 282         for (i = 0; i < 5; i++) {
 283                 tps6586x->mask_reg[i] = 0xff;
 284                 tps6586x_write(tps6586x->dev, TPS6586X_INT_MASK1 + i, 0xff);
 285         }
 286
 287         tps6586x_reads(tps6586x->dev, TPS6586X_INT_ACK1, sizeof(tmp), tmp);
 288
 289         tps6586x->irq_base = irq_base;
 290
 291         tps6586x->irq_chip.name = "tps6586x";
 292         tps6586x->irq_chip.irq_enable = tps6586x_irq_enable;
 293         tps6586x->irq_chip.irq_disable = tps6586x_irq_disable;
 294         tps6586x->irq_chip.irq_bus_lock = tps6586x_irq_lock;
 295         tps6586x->irq_chip.irq_bus_sync_unlock = tps6586x_irq_sync_unlock;
 296
 297         for (i = 0; i < ARRAY_SIZE(tps6586x_irqs); i++) {
 298                 int __irq = i + tps6586x->irq_base;
 299                 irq_set_chip_data(__irq, tps6586x);
 300                 irq_set_chip_and_handler(__irq, &tps6586x->irq_chip,
 301                                          handle_simple_irq);
 302                 irq_set_nested_thread(__irq, 1);
 303 #ifdef CONFIG_ARM
 304                 set_irq_flags(__irq, IRQF_VALID);
 305 #endif
 306         }
 307
 308         ret = request_threaded_irq(irq, NULL, tps6586x_irq, IRQF_ONESHOT,
 309                                    "tps6586x", tps6586x);
 310
 311         if (!ret) {
 312                 device_init_wakeup(tps6586x->dev, 1);
 313                 enable_irq_wake(irq);
 314         }
 315
 316         return ret;
 317 }
 318
 319 static int tps6586x_add_subdevs(struct tps6586x *tps6586x,
 320                                           struct tps6586x_platform_data *pdata)
 321 {
 322         struct tps6586x_subdev_info *subdev;
 323         struct platform_device *pdev;
 324         int i, ret = 0;
 325
 326         for (i = 0; i < pdata->num_subdevs; i++) {
 327                 subdev = &pdata->subdevs[i];
 328
 329                 pdev = platform_device_alloc(subdev->name, subdev->id);
 330                 if (!pdev) {
 331                         ret = -ENOMEM;
 332                         goto failed;
 333                 }
 334
 335                 pdev->dev.parent = tps6586x->dev;
 336                 pdev->dev.platform_data = subdev->platform_data;
 337                 pdev->dev.of_node = subdev->of_node;
 338
 339                 ret = platform_device_add(pdev);
 340                 if (ret) {
 341                         platform_device_put(pdev);
 342                         goto failed;
 343                 }
 344         }
 345         return 0;
 346
 347 failed:
 348         tps6586x_remove_subdevs(tps6586x);
 349         return ret;
 350 }
 351
 352 #ifdef CONFIG_OF
 353 static struct of_regulator_match tps6586x_matches[] = {
 354         { .name = "sys",     .driver_data = (void *)TPS6586X_ID_SYS     },
 355         { .name = "sm0",     .driver_data = (void *)TPS6586X_ID_SM_0    },
 356         { .name = "sm1",     .driver_data = (void *)TPS6586X_ID_SM_1    },
 357         { .name = "sm2",     .driver_data = (void *)TPS6586X_ID_SM_2    },
 358         { .name = "ldo0",    .driver_data = (void *)TPS6586X_ID_LDO_0   },
 359         { .name = "ldo1",    .driver_data = (void *)TPS6586X_ID_LDO_1   },
 360         { .name = "ldo2",    .driver_data = (void *)TPS6586X_ID_LDO_2   },
 361         { .name = "ldo3",    .driver_data = (void *)TPS6586X_ID_LDO_3   },
 362         { .name = "ldo4",    .driver_data = (void *)TPS6586X_ID_LDO_4   },
 363         { .name = "ldo5",    .driver_data = (void *)TPS6586X_ID_LDO_5   },
 364         { .name = "ldo6",    .driver_data = (void *)TPS6586X_ID_LDO_6   },
 365         { .name = "ldo7",    .driver_data = (void *)TPS6586X_ID_LDO_7   },
 366         { .name = "ldo8",    .driver_data = (void *)TPS6586X_ID_LDO_8   },
 367         { .name = "ldo9",    .driver_data = (void *)TPS6586X_ID_LDO_9   },
 368         { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
 369 };
 370
 371 static struct tps6586x_platform_data *tps6586x_parse_dt(struct i2c_client *client)
 372 {
 373         const unsigned int num = ARRAY_SIZE(tps6586x_matches);
 374         struct device_node *np = client->dev.of_node;
 375         struct tps6586x_platform_data *pdata;
 376         struct tps6586x_subdev_info *devs;
 377         struct device_node *regs;
 378         const char *sys_rail_name = NULL;
 379         unsigned int count;
 380         unsigned int i, j;
 381         int err;
 382
 383         regs = of_find_node_by_name(np, "regulators");
 384         if (!regs)
 385                 return NULL;
 386
 387         err = of_regulator_match(&client->dev, regs, tps6586x_matches, num);
 388         if (err < 0) {
 389                 of_node_put(regs);
 390                 return NULL;
 391         }
 392
 393         of_node_put(regs);
 394         count = err;
 395
 396         devs = devm_kzalloc(&client->dev, count * sizeof(*devs), GFP_KERNEL);
 397         if (!devs)
 398                 return NULL;
 399
 400         for (i = 0, j = 0; i < num && j < count; i++) {
 401                 struct regulator_init_data *reg_idata;
 402
 403                 if (!tps6586x_matches[i].init_data)
 404                         continue;
 405
 406                 reg_idata  = tps6586x_matches[i].init_data;
 407                 devs[j].name = "tps6586x-regulator";
 408                 devs[j].platform_data = tps6586x_matches[i].init_data;
 409                 devs[j].id = (int)tps6586x_matches[i].driver_data;
 410                 if (devs[j].id == TPS6586X_ID_SYS)
 411                         sys_rail_name = reg_idata->constraints.name;
 412
 413                 if ((devs[j].id == TPS6586X_ID_LDO_5) ||
 414                         (devs[j].id == TPS6586X_ID_LDO_RTC))
 415                         reg_idata->supply_regulator = sys_rail_name;
 416
 417                 devs[j].of_node = tps6586x_matches[i].of_node;
 418                 j++;
 419         }
 420
 421         pdata = devm_kzalloc(&client->dev, sizeof(*pdata), GFP_KERNEL);
 422         if (!pdata)
 423                 return NULL;
 424
 425         pdata->num_subdevs = count;
 426         pdata->subdevs = devs;
 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 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 - 1,
 458         .volatile_reg = is_volatile_reg,
 459         .cache_type = REGCACHE_RBTREE,
 460 };
 461
 462 static struct device *tps6586x_dev;
 463 static void tps6586x_power_off(void)
 464 {
 465         if (tps6586x_clr_bits(tps6586x_dev, TPS6586X_SUPPLYENE, EXITSLREQ_BIT))
 466                 return;
 467
 468         tps6586x_set_bits(tps6586x_dev, TPS6586X_SUPPLYENE, SLEEP_MODE_BIT);
 469 }
 470
 471 static int tps6586x_i2c_probe(struct i2c_client *client,
 472                                         const struct i2c_device_id *id)
 473 {
 474         struct tps6586x_platform_data *pdata = client->dev.platform_data;
 475         struct tps6586x *tps6586x;
 476         int ret;
 477
 478         if (!pdata && client->dev.of_node)
 479                 pdata = tps6586x_parse_dt(client);
 480
 481         if (!pdata) {
 482                 dev_err(&client->dev, "tps6586x requires platform data\n");
 483                 return -ENOTSUPP;
 484         }
 485
 486         ret = i2c_smbus_read_byte_data(client, TPS6586X_VERSIONCRC);
 487         if (ret < 0) {
 488                 dev_err(&client->dev, "Chip ID read failed: %d\n", ret);
 489                 return -EIO;
 490         }
 491
 492         dev_info(&client->dev, "VERSIONCRC is %02x\n", ret);
 493
 494         tps6586x = devm_kzalloc(&client->dev, sizeof(*tps6586x), GFP_KERNEL);
 495         if (tps6586x == NULL) {
 496                 dev_err(&client->dev, "memory for tps6586x alloc failed\n");
 497                 return -ENOMEM;
 498         }
 499
 500         tps6586x->client = client;
 501         tps6586x->dev = &client->dev;
 502         i2c_set_clientdata(client, tps6586x);
 503
 504         tps6586x->regmap = devm_regmap_init_i2c(client,
 505                                         &tps6586x_regmap_config);
 506         if (IS_ERR(tps6586x->regmap)) {
 507                 ret = PTR_ERR(tps6586x->regmap);
 508                 dev_err(&client->dev, "regmap init failed: %d\n", ret);
 509                 return ret;
 510         }
 511
 512
 513         if (client->irq) {
 514                 ret = tps6586x_irq_init(tps6586x, client->irq,
 515                                         pdata->irq_base);
 516                 if (ret) {
 517                         dev_err(&client->dev, "IRQ init failed: %d\n", ret);
 518                         return ret;
 519                 }
 520         }
 521
 522         ret = mfd_add_devices(tps6586x->dev, -1,
 523                               tps6586x_cell, ARRAY_SIZE(tps6586x_cell),
 524                               NULL, 0, NULL);
 525         if (ret < 0) {
 526                 dev_err(&client->dev, "mfd_add_devices failed: %d\n", ret);
 527                 goto err_mfd_add;
 528         }
 529
 530         ret = tps6586x_add_subdevs(tps6586x, pdata);
 531         if (ret) {
 532                 dev_err(&client->dev, "add devices failed: %d\n", ret);
 533                 goto err_add_devs;
 534         }
 535
 536         if (pdata->pm_off && !pm_power_off) {
 537                 tps6586x_dev = &client->dev;
 538                 pm_power_off = tps6586x_power_off;
 539         }
 540
 541         return 0;
 542
 543 err_add_devs:
 544         mfd_remove_devices(tps6586x->dev);
 545 err_mfd_add:
 546         if (client->irq)
 547                 free_irq(client->irq, tps6586x);
 548         return ret;
 549 }
 550
 551 static int tps6586x_i2c_remove(struct i2c_client *client)
 552 {
 553         struct tps6586x *tps6586x = i2c_get_clientdata(client);
 554
 555         tps6586x_remove_subdevs(tps6586x);
 556         mfd_remove_devices(tps6586x->dev);
 557         if (client->irq)
 558                 free_irq(client->irq, tps6586x);
 559         return 0;
 560 }
 561
 562 static const struct i2c_device_id tps6586x_id_table[] = {
 563         { "tps6586x", 0 },
 564         { },
 565 };
 566 MODULE_DEVICE_TABLE(i2c, tps6586x_id_table);
 567
 568 static struct i2c_driver tps6586x_driver = {
 569         .driver = {
 570                 .name   = "tps6586x",
 571                 .owner  = THIS_MODULE,
 572                 .of_match_table = of_match_ptr(tps6586x_of_match),
 573         },
 574         .probe          = tps6586x_i2c_probe,
 575         .remove         = tps6586x_i2c_remove,
 576         .id_table       = tps6586x_id_table,
 577 };
 578
 579 static int __init tps6586x_init(void)
 580 {
 581         return i2c_add_driver(&tps6586x_driver);
 582 }
 583 subsys_initcall(tps6586x_init);
 584
 585 static void __exit tps6586x_exit(void)
 586 {
 587         i2c_del_driver(&tps6586x_driver);
 588 }
 589 module_exit(tps6586x_exit);
 590
 591 MODULE_DESCRIPTION("TPS6586X core driver");
 592 MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
 593 MODULE_LICENSE("GPL");