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         { .name = "max77693-charger", },
  47         { .name = "max77693-muic", },
  48         {
  49                 .name = "max77693-haptic",
  50                 .of_compatible = "maxim,max77693-haptic",
  51         },
  52         {
  53                 .name = "max77693-flash",
  54                 .of_compatible = "maxim,max77693-flash",
  55         },
  56 };
  57
  58 static const struct regmap_config max77693_regmap_config = {
  59         .reg_bits = 8,
  60         .val_bits = 8,
  61         .max_register = MAX77693_PMIC_REG_END,
  62 };
  63
  64 static const struct regmap_irq max77693_led_irqs[] = {
  65         { .mask = LED_IRQ_FLED2_OPEN,  },
  66         { .mask = LED_IRQ_FLED2_SHORT, },
  67         { .mask = LED_IRQ_FLED1_OPEN,  },
  68         { .mask = LED_IRQ_FLED1_SHORT, },
  69         { .mask = LED_IRQ_MAX_FLASH,   },
  70 };
  71
  72 static const struct regmap_irq_chip max77693_led_irq_chip = {
  73         .name                   = "max77693-led",
  74         .status_base            = MAX77693_LED_REG_FLASH_INT,
  75         .mask_base              = MAX77693_LED_REG_FLASH_INT_MASK,
  76         .mask_invert            = false,
  77         .num_regs               = 1,
  78         .irqs                   = max77693_led_irqs,
  79         .num_irqs               = ARRAY_SIZE(max77693_led_irqs),
  80 };
  81
  82 static const struct regmap_irq max77693_topsys_irqs[] = {
  83         { .mask = TOPSYS_IRQ_T120C_INT,  },
  84         { .mask = TOPSYS_IRQ_T140C_INT,  },
  85         { .mask = TOPSYS_IRQ_LOWSYS_INT, },
  86 };
  87
  88 static const struct regmap_irq_chip max77693_topsys_irq_chip = {
  89         .name                   = "max77693-topsys",
  90         .status_base            = MAX77693_PMIC_REG_TOPSYS_INT,
  91         .mask_base              = MAX77693_PMIC_REG_TOPSYS_INT_MASK,
  92         .mask_invert            = false,
  93         .num_regs               = 1,
  94         .irqs                   = max77693_topsys_irqs,
  95         .num_irqs               = ARRAY_SIZE(max77693_topsys_irqs),
  96 };
  97
  98 static const struct regmap_irq max77693_charger_irqs[] = {
  99         { .mask = CHG_IRQ_BYP_I,   },
 100         { .mask = CHG_IRQ_THM_I,   },
 101         { .mask = CHG_IRQ_BAT_I,   },
 102         { .mask = CHG_IRQ_CHG_I,   },
 103         { .mask = CHG_IRQ_CHGIN_I, },
 104 };
 105
 106 static const struct regmap_irq_chip max77693_charger_irq_chip = {
 107         .name                   = "max77693-charger",
 108         .status_base            = MAX77693_CHG_REG_CHG_INT,
 109         .mask_base              = MAX77693_CHG_REG_CHG_INT_MASK,
 110         .mask_invert            = false,
 111         .num_regs               = 1,
 112         .irqs                   = max77693_charger_irqs,
 113         .num_irqs               = ARRAY_SIZE(max77693_charger_irqs),
 114 };
 115
 116 static const struct regmap_config max77693_regmap_muic_config = {
 117         .reg_bits = 8,
 118         .val_bits = 8,
 119         .max_register = MAX77693_MUIC_REG_END,
 120 };
 121
 122 static const struct regmap_irq max77693_muic_irqs[] = {
 123         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC,           },
 124         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW,       },
 125         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR,       },
 126         { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K,         },
 127
 128         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP,        },
 129         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN,    },
 130         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR,        },
 131         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP,         },
 132         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT,        },
 133         { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM,         },
 134
 135         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC,           },
 136         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC,         },
 137         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP,           },
 138         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR,    },
 139         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED,   },
 140         { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET,       },
 141 };
 142
 143 static const struct regmap_irq_chip max77693_muic_irq_chip = {
 144         .name                   = "max77693-muic",
 145         .status_base            = MAX77693_MUIC_REG_INT1,
 146         .mask_base              = MAX77693_MUIC_REG_INTMASK1,
 147         .mask_invert            = true,
 148         .num_regs               = 3,
 149         .irqs                   = max77693_muic_irqs,
 150         .num_irqs               = ARRAY_SIZE(max77693_muic_irqs),
 151 };
 152
 153 static const struct regmap_config max77693_regmap_haptic_config = {
 154         .reg_bits = 8,
 155         .val_bits = 8,
 156         .max_register = MAX77693_HAPTIC_REG_END,
 157 };
 158
 159 static int max77693_i2c_probe(struct i2c_client *i2c,
 160                               const struct i2c_device_id *id)
 161 {
 162         struct max77693_dev *max77693;
 163         unsigned int reg_data;
 164         int ret = 0;
 165
 166         max77693 = devm_kzalloc(&i2c->dev,
 167                         sizeof(struct max77693_dev), GFP_KERNEL);
 168         if (max77693 == NULL)
 169                 return -ENOMEM;
 170
 171         i2c_set_clientdata(i2c, max77693);
 172         max77693->dev = &i2c->dev;
 173         max77693->i2c = i2c;
 174         max77693->irq = i2c->irq;
 175         max77693->type = id->driver_data;
 176
 177         max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config);
 178         if (IS_ERR(max77693->regmap)) {
 179                 ret = PTR_ERR(max77693->regmap);
 180                 dev_err(max77693->dev, "failed to allocate register map: %d\n",
 181                                 ret);
 182                 return ret;
 183         }
 184
 185         ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2,
 186                                 &reg_data);
 187         if (ret < 0) {
 188                 dev_err(max77693->dev, "device not found on this channel\n");
 189                 return ret;
 190         } else
 191                 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data);
 192
 193         max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
 194         if (!max77693->muic) {
 195                 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n");
 196                 return -ENODEV;
 197         }
 198         i2c_set_clientdata(max77693->muic, max77693);
 199
 200         max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
 201         if (!max77693->haptic) {
 202                 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n");
 203                 ret = -ENODEV;
 204                 goto err_i2c_haptic;
 205         }
 206         i2c_set_clientdata(max77693->haptic, max77693);
 207
 208         max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic,
 209                                         &max77693_regmap_haptic_config);
 210         if (IS_ERR(max77693->regmap_haptic)) {
 211                 ret = PTR_ERR(max77693->regmap_haptic);
 212                 dev_err(max77693->dev,
 213                         "failed to initialize haptic register map: %d\n", ret);
 214                 goto err_regmap;
 215         }
 216
 217         /*
 218          * Initialize register map for MUIC device because use regmap-muic
 219          * instance of MUIC device when irq of max77693 is initialized
 220          * before call max77693-muic probe() function.
 221          */
 222         max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic,
 223                                          &max77693_regmap_muic_config);
 224         if (IS_ERR(max77693->regmap_muic)) {
 225                 ret = PTR_ERR(max77693->regmap_muic);
 226                 dev_err(max77693->dev,
 227                         "failed to allocate register map: %d\n", ret);
 228                 goto err_regmap;
 229         }
 230
 231         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 232                                 IRQF_ONESHOT | IRQF_SHARED |
 233                                 IRQF_TRIGGER_FALLING, 0,
 234                                 &max77693_led_irq_chip,
 235                                 &max77693->irq_data_led);
 236         if (ret) {
 237                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 238                 goto err_regmap;
 239         }
 240
 241         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 242                                 IRQF_ONESHOT | IRQF_SHARED |
 243                                 IRQF_TRIGGER_FALLING, 0,
 244                                 &max77693_topsys_irq_chip,
 245                                 &max77693->irq_data_topsys);
 246         if (ret) {
 247                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 248                 goto err_irq_topsys;
 249         }
 250
 251         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 252                                 IRQF_ONESHOT | IRQF_SHARED |
 253                                 IRQF_TRIGGER_FALLING, 0,
 254                                 &max77693_charger_irq_chip,
 255                                 &max77693->irq_data_charger);
 256         if (ret) {
 257                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 258                 goto err_irq_charger;
 259         }
 260
 261         ret = regmap_add_irq_chip(max77693->regmap, max77693->irq,
 262                                 IRQF_ONESHOT | IRQF_SHARED |
 263                                 IRQF_TRIGGER_FALLING, 0,
 264                                 &max77693_muic_irq_chip,
 265                                 &max77693->irq_data_muic);
 266         if (ret) {
 267                 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret);
 268                 goto err_irq_muic;
 269         }
 270
 271         pm_runtime_set_active(max77693->dev);
 272
 273         ret = mfd_add_devices(max77693->dev, -1, max77693_devs,
 274                               ARRAY_SIZE(max77693_devs), NULL, 0, NULL);
 275         if (ret < 0)
 276                 goto err_mfd;
 277
 278         return ret;
 279
 280 err_mfd:
 281         mfd_remove_devices(max77693->dev);
 282         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
 283 err_irq_muic:
 284         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
 285 err_irq_charger:
 286         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
 287 err_irq_topsys:
 288         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
 289 err_regmap:
 290         i2c_unregister_device(max77693->haptic);
 291 err_i2c_haptic:
 292         i2c_unregister_device(max77693->muic);
 293         return ret;
 294 }
 295
 296 static int max77693_i2c_remove(struct i2c_client *i2c)
 297 {
 298         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
 299
 300         mfd_remove_devices(max77693->dev);
 301
 302         regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
 303         regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
 304         regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
 305         regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
 306
 307         i2c_unregister_device(max77693->muic);
 308         i2c_unregister_device(max77693->haptic);
 309
 310         return 0;
 311 }
 312
 313 static const struct i2c_device_id max77693_i2c_id[] = {
 314         { "max77693", TYPE_MAX77693 },
 315         { }
 316 };
 317 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
 318
 319 static int max77693_suspend(struct device *dev)
 320 {
 321         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 322         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
 323
 324         if (device_may_wakeup(dev)) {
 325                 enable_irq_wake(max77693->irq);
 326                 disable_irq(max77693->irq);
 327         }
 328
 329         return 0;
 330 }
 331
 332 static int max77693_resume(struct device *dev)
 333 {
 334         struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
 335         struct max77693_dev *max77693 = i2c_get_clientdata(i2c);
 336
 337         if (device_may_wakeup(dev)) {
 338                 disable_irq_wake(max77693->irq);
 339                 enable_irq(max77693->irq);
 340         }
 341
 342         return 0;
 343 }
 344
 345 static const struct dev_pm_ops max77693_pm = {
 346         .suspend = max77693_suspend,
 347         .resume = max77693_resume,
 348 };
 349
 350 #ifdef CONFIG_OF
 351 static const struct of_device_id max77693_dt_match[] = {
 352         { .compatible = "maxim,max77693" },
 353         {},
 354 };
 355 #endif
 356
 357 static struct i2c_driver max77693_i2c_driver = {
 358         .driver = {
 359                    .name = "max77693",
 360                    .owner = THIS_MODULE,
 361                    .pm = &max77693_pm,
 362                    .of_match_table = of_match_ptr(max77693_dt_match),
 363         },
 364         .probe = max77693_i2c_probe,
 365         .remove = max77693_i2c_remove,
 366         .id_table = max77693_i2c_id,
 367 };
 368
 369 static int __init max77693_i2c_init(void)
 370 {
 371         return i2c_add_driver(&max77693_i2c_driver);
 372 }
 373 /* init early so consumer devices can complete system boot */
 374 subsys_initcall(max77693_i2c_init);
 375
 376 static void __exit max77693_i2c_exit(void)
 377 {
 378         i2c_del_driver(&max77693_i2c_driver);
 379 }
 380 module_exit(max77693_i2c_exit);
 381
 382 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
 383 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
 384 MODULE_LICENSE("GPL");