linux/drivers/mfd/max77693.c
<<
>>
Prefs
   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
  44static 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-flash",
  57                .of_compatible = "maxim,max77693-flash",
  58        },
  59};
  60
  61static const struct regmap_config max77693_regmap_config = {
  62        .reg_bits = 8,
  63        .val_bits = 8,
  64        .max_register = MAX77693_PMIC_REG_END,
  65};
  66
  67static 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
  75static 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
  85static 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
  91static 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
 101static 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
 109static 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
 119static 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
 125static 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
 146static 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
 156static 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
 162static 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
 294err_mfd:
 295        mfd_remove_devices(max77693->dev);
 296err_intsrc:
 297        regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic);
 298err_irq_muic:
 299        regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger);
 300err_irq_charger:
 301        regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys);
 302err_irq_topsys:
 303        regmap_del_irq_chip(max77693->irq, max77693->irq_data_led);
 304err_regmap:
 305        i2c_unregister_device(max77693->haptic);
 306err_i2c_haptic:
 307        i2c_unregister_device(max77693->muic);
 308        return ret;
 309}
 310
 311static 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
 328static const struct i2c_device_id max77693_i2c_id[] = {
 329        { "max77693", TYPE_MAX77693 },
 330        { }
 331};
 332MODULE_DEVICE_TABLE(i2c, max77693_i2c_id);
 333
 334static 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
 347static 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
 360static const struct dev_pm_ops max77693_pm = {
 361        .suspend = max77693_suspend,
 362        .resume = max77693_resume,
 363};
 364
 365#ifdef CONFIG_OF
 366static const struct of_device_id max77693_dt_match[] = {
 367        { .compatible = "maxim,max77693" },
 368        {},
 369};
 370#endif
 371
 372static 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
 384static 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 */
 389subsys_initcall(max77693_i2c_init);
 390
 391static void __exit max77693_i2c_exit(void)
 392{
 393        i2c_del_driver(&max77693_i2c_driver);
 394}
 395module_exit(max77693_i2c_exit);
 396
 397MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver");
 398MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>");
 399MODULE_LICENSE("GPL");
 400
lxr.linux.no kindly hosted by Redpill Linpro AS, provider of Linux consulting and operations services since 1995.