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