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