kernel/drivers/mfd/max77693.c

   1 /*
   2  * max77693.c - mfd core driver for the MAX 77693
   3  *
   4  * Copyright (C) 2012 Samsung Electronics
   5  * SangYoung Son <hello.son@smasung.com>
   6  *
   7  * This program is not provided / owned by Maxim Integrated Products.
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  *
  23  * This driver is based on max8997.c
  24  */
  25
  26 #include <linux/module.h>
  27 #include <linux/slab.h>
  28 #include <linux/i2c.h>
  29 #include <linux/err.h>
  30 #include <linux/interrupt.h>
  31 #include <linux/of.h>
  32 #include <linux/pm_runtime.h>
  33 #include <linux/mutex.h>
  34 #include <linux/mfd/core.h>
  35 #include <linux/mfd/max77693.h>
  36 #include <linux/mfd/max77693-private.h>
  37 #include <linux/regulator/machine.h>
  38 #include <linux/regmap.h>
  39
  40 #define I2C_ADDR_PMIC   (0xCC >> 1)     /* Charger, Flash LED */
  41 #define I2C_ADDR_MUIC   (0x4A >> 1)
  42 #define I2C_ADDR_HAPTIC (0x90 >> 1)
  43
  44 static const struct mfd_cell max77693_devs[] = {
  45         { .name = "max77693-pmic", },
  46         {
  47                 .name = "max77693-charger",
  48                 .of_compatible = "maxim,max77693-charger",
  49         },
  50         { .name = "max77693-muic", },
  51         {
  52                 .name = "max77693-haptic",
  53                 .of_compatible = "maxim,max77693-haptic",
  54         },
  55         {
  56                 .name = "max77693-led",
  57                 .of_compatible = "maxim,max77693-led",
  58         },
  59 };
  60
  61 static const struct regmap_config max77693_regmap_config = {
  62         .reg_bits = 8,
  63         .val_bits = 8,
  64         .max_register = MAX77693_PMIC_REG_END,
  65 };
  66
  67 static const struct regmap_irq max77693_led_irqs[] = {
  68         { .mask = LED_IRQ_FLED2_OPEN,  },
  69         { .mask = LED_IRQ_FLED2_SHORT, },
  70         { .mask = LED_IRQ_FLED1_OPEN,  },
  71         { .mask = LED_IRQ_FLED1_SHORT, },
  72         { .mask = LED_IRQ_MAX_FLASH,   },
  73 };
  74
  75 static const struct regmap_irq_chip max77693_led_irq_chip = {
  76         .name                   = "max77693-led",
  77         .status_base            = MAX77693_LED_REG_FLASH_INT,
  78         .mask_base              = MAX77693_LED_REG_FLASH_INT_MASK,
  79         .mask_invert            = false,
  80         .num_regs               = 1,
  81         .irqs                   = max77693_led_irqs,
  82         .num_irqs               = ARRAY_SIZE(max77693_led_irqs),
  83 };
  84
  85 static const struct regmap_irq max77693_topsys_irqs[] = {
  86         { .mask = TOPSYS_IRQ_T120C_INT,  },
  87         { .mask = TOPSYS_IRQ_T140C_INT,  },
  88         { .mask = TOPSYS_IRQ_LOWSYS_INT, },
  89 };
  90
  91 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
  92         .name                   = "max77693-topsys",
  93         .status_base            = MAX77693_PMIC_REG_TOPSYS_INT,
  94         .mask_base              = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
  95         .mask_invert            = false,
  96         .num_regs               = 1,
  97         .irqs                   = max77693_topsys_irqs,
  98         .num_irqs               = ARRAY_SIZE(max77693_topsys_irqs),
  99 };
 100
 101 static const struct regmap_irq max77693_charger_irqs[] = {
 102         { .mask = CHG_IRQ_BYP_I,   },
 103         { .mask = CHG_IRQ_THM_I,   },
 104         { .mask = CHG_IRQ_BAT_I,   },
 105         { .mask = CHG_IRQ_CHG_I,   },
 106         { .mask = CHG_IRQ_CHGIN_I, },
 107 };
 108
 109 static const struct regmap_irq_chip max77693_charger_irq_chip = {
 110         .name                   = "max77693-charger",
 111         .status_base            = MAX77693_CHG_REG_CHG_INT,
 112         .mask_base              = MAX77693_CHG_REG_CHG_INT_MASK,
 113         .mask_invert            = false,
 114         .num_regs               = 1,
 115         .irqs                   = max77693_charger_irqs,
 116         .num_irqs               = ARRAY_SIZE(max77693_charger_irqs),
 117 };
 118
 119 static const struct regmap_config max77693_regmap_muic_config = {
 120         .reg_bits = 8,
 121         .val_bits = 8,
 122         .max_register = MAX77693_MUIC_REG_END,
 123 };
 124
 125 static const struct regmap_irq max77693_muic_irqs[] = {
 126         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,           },
 127         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,       },
 128         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,       },
 129         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,         },
 130
 131         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,        },
 132         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
 133         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,        },
 134         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,         },
 135         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,        },
 136         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,         },
 137
 138         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,           },
 139         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,         },
 140         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,           },
 141         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
 142         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
 143         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,       },
 144 };
 145
 146 static const struct regmap_irq_chip max77693_muic_irq_chip = {
 147         .name                   = "max77693-muic",
 148         .status_base            = MAX77693_MUIC_REG_INT1,
 149         .mask_base              = MAX77693_MUIC_REG_INTMASK1,
 150         .mask_invert            = true,
 151         .num_regs               = 3,
 152         .irqs                   = max77693_muic_irqs,
 153         .num_irqs               = ARRAY_SIZE(max77693_muic_irqs),
 154 };
 155
 156 static const struct regmap_config max77693_regmap_haptic_config = {
 157         .reg_bits = 8,
 158         .val_bits = 8,
 159         .max_register = MAX77693_HAPTIC_REG_END,
 160 };
 161
 162 static int max77693_i2c_probe(struct i2c_client *i2c,
 163                               const struct i2c_device_id *id)
 164 {
 165         struct max77693_dev *max77693;
 166         unsigned int reg_data;
 167         int ret = 0;
 168
 169         max77693 = devm_kzalloc(&i2c->dev,
 170                         sizeof(struct max77693_dev), GFP_KERNEL);
 171         if (max77693 == NULL)
 172                 return -ENOMEM;
 173
 174         i2c_set_clientdata(i2c, max77693);
 175         max77693->dev = &i2c->dev;
 176         max77693->i2c = i2c;
 177         max77693->irq = i2c->irq;
 178         max77693->type = id->driver_data;
 179
 180         max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
 181         if (IS_ERR(max77693->regmap)) {
 182                 ret = PTR_ERR(max77693->regmap);
 183                 dev_err(max77693->dev, "failed to allocate register map: %d\n",
 184                                 ret);
 185                 return ret;
 186         }
 187
 188         ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
 189                                 &reg_data);
 190         if (ret < 0) {
 191                 dev_err(max77693->dev, "device not found on this channel\n");
 192                 return ret;
 193         } else
 194                 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
 195
 196         max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
 197         if (!max77693->muic) {
 198                 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
 199                 return -ENODEV;
 200         }
 201         i2c_set_clientdata(max77693->muic, max77693);
 202
 203         max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
 204         if (!max77693->haptic) {
 205                 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
 206                 ret = -ENODEV;
 207                 goto err_i2c_haptic;
 208         }
 209         i2c_set_clientdata(max77693->haptic, max77693);
 210
 211         max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic,
 212                                         &max77693_regmap_haptic_config);
 213         if (IS_ERR(max77693->regmap_haptic)) {
 214                 ret = PTR_ERR(max77693->regmap_haptic);
 215                 dev_err(max77693->dev,
 216                         "failed to initialize haptic register map: %d\n", ret);
 217                 goto err_regmap;
 218         }
 219
 220         /*
 221          * Initialize register map for MUIC device because use regmap-muic
 222          * instance of MUIC device when irq of max77693 is initialized
 223          * before call max77693-muic probe() function.
 224          */
 225         max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
 226                                          &max77693_regmap_muic_config);
 227         if (IS_ERR(max77693->regmap_muic)) {
 228                 ret = PTR_ERR(max77693->regmap_muic);
 229                 dev_err(max77693->dev,
 230                         "failed to allocate register map: %d\n", ret);
 231                 goto err_regmap;
 232         }
 233
 234         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 235                                 IRQF_ONESHOT | IRQF_SHARED |
 236                                 IRQF_TRIGGER_FALLING, 0,
 237                                 &max77693_led_irq_chip,
 238                                 &max77693->irq_data_led);
 239         if (ret) {
 240                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 241                 goto err_regmap;
 242         }
 243
 244         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 245                                 IRQF_ONESHOT | IRQF_SHARED |
 246                                 IRQF_TRIGGER_FALLING, 0,
 247                                 &max77693_topsys_irq_chip,
 248                                 &max77693->irq_data_topsys);
 249         if (ret) {
 250                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 251                 goto err_irq_topsys;
 252         }
 253
 254         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 255                                 IRQF_ONESHOT | IRQF_SHARED |
 256                                 IRQF_TRIGGER_FALLING, 0,
 257                                 &max77693_charger_irq_chip,
 258                                 &max77693->irq_data_charger);
 259         if (ret) {
 260                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 261                 goto err_irq_charger;
 262         }
 263
 264         ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq,
 265                                 IRQF_ONESHOT | IRQF_SHARED |
 266                                 IRQF_TRIGGER_FALLING, 0,
 267                                 &max77693_muic_irq_chip,
 268                                 &max77693->irq_data_muic);
 269         if (ret) {
 270                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 271                 goto err_irq_muic;
 272         }
 273
 274         /* Unmask interrupts from all blocks in interrupt source register */
 275         ret = regmap_update_bits(max77693->regmap,
 276                                 MAX77693_PMIC_REG_INTSRC_MASK,
 277                                 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL);
 278         if (ret < 0) {
 279                 dev_err(max77693->dev,
 280                         "Could not unmask interrupts in INTSRC: %d\n",
 281                         ret);
 282                 goto err_intsrc;
 283         }
 284
 285         pm_runtime_set_active(max77693->dev);
 286
 287         ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
 288                               ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
 289         if (ret < 0)
 290                 goto err_mfd;
 291
 292         return ret;
 293
 294 err_mfd:
 295         mfd_remove_devices(max77693->dev);
 296 err_intsrc:
 297         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
 298 err_irq_muic:
 299         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
 300 err_irq_charger:
 301         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
 302 err_irq_topsys:
 303         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
 304 err_regmap:
 305         i2c_unregister_device(max77693->haptic);
 306 err_i2c_haptic:
 307         i2c_unregister_device(max77693->muic);
 308         return ret;
 309 }
 310
 311 static int max77693_i2c_remove(struct i2c_client *i2c)
 312 {
 313         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
 314
 315         mfd_remove_devices(max77693->dev);
 316
 317         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
 318         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
 319         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
 320         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
 321
 322         i2c_unregister_device(max77693->muic);
 323         i2c_unregister_device(max77693->haptic);
 324
 325         return 0;
 326 }
 327
 328 static const struct i2c_device_id max77693_i2c_id[] = {
 329         { "max77693", TYPE_MAX77693 },
 330         { }
 331 };
 332 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
 333
 334 static int max77693_suspend(struct device *dev)
 335 {
 336         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 337         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
 338
 339         if (device_may_wakeup(dev)) {
 340                 enable_irq_wake(max77693->irq);
 341                 disable_irq(max77693->irq);
 342         }
 343
 344         return 0;
 345 }
 346
 347 static int max77693_resume(struct device *dev)
 348 {
 349         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 350         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
 351
 352         if (device_may_wakeup(dev)) {
 353                 disable_irq_wake(max77693->irq);
 354                 enable_irq(max77693->irq);
 355         }
 356
 357         return 0;
 358 }
 359
 360 static const struct dev_pm_ops max77693_pm = {
 361         .suspend = max77693_suspend,
 362         .resume = max77693_resume,
 363 };
 364
 365 #ifdef CONFIG_OF
 366 static const struct of_device_id max77693_dt_match[] = {
 367         { .compatible = "maxim,max77693" },
 368         {},
 369 };
 370 #endif
 371
 372 static struct i2c_driver max77693_i2c_driver = {
 373         .driver = {
 374                    .name = "max77693",
 375                    .owner = THIS_MODULE,
 376                    .pm = &max77693_pm,
 377                    .of_match_table = of_match_ptr(max77693_dt_match),
 378         },
 379         .probe = max77693_i2c_probe,
 380         .remove = max77693_i2c_remove,
 381         .id_table = max77693_i2c_id,
 382 };
 383
 384 static int __init max77693_i2c_init(void)
 385 {
 386         return i2c_add_driver(&max77693_i2c_driver);
 387 }
 388 /* init early so consumer devices can complete system boot */
 389 subsys_initcall(max77693_i2c_init);
 390
 391 static void __exit max77693_i2c_exit(void)
 392 {
 393         i2c_del_driver(&max77693_i2c_driver);
 394 }
 395 module_exit(max77693_i2c_exit);
 396
 397 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
 398 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
 399 MODULE_LICENSE("GPL");