drivers/mfd/sec-core.c

   1 /*
   2  * sec-core.c
   3  *
   4  * Copyright (c) 2012 Samsung Electronics Co., Ltd
   5  *              http://www.samsung.com
   6  *
   7  *  This program is free software; you can redistribute  it and/or modify it
   8  *  under  the terms of  the GNU General  Public License as published by the
   9  *  Free Software Foundation;  either version 2 of the  License, or (at your
  10  *  option) any later version.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/init.h>
  17 #include <linux/err.h>
  18 #include <linux/slab.h>
  19 #include <linux/i2c.h>
  20 #include <linux/of.h>
  21 #include <linux/of_irq.h>
  22 #include <linux/interrupt.h>
  23 #include <linux/pm_runtime.h>
  24 #include <linux/mutex.h>
  25 #include <linux/mfd/core.h>
  26 #include <linux/mfd/samsung/core.h>
  27 #include <linux/mfd/samsung/irq.h>
  28 #include <linux/mfd/samsung/rtc.h>
  29 #include <linux/mfd/samsung/s2mps11.h>
  30 #include <linux/mfd/samsung/s5m8763.h>
  31 #include <linux/mfd/samsung/s5m8767.h>
  32 #include <linux/regmap.h>
  33
  34 static struct mfd_cell s5m8751_devs[] = {
  35         {
  36                 .name = "s5m8751-pmic",
  37         }, {
  38                 .name = "s5m-charger",
  39         }, {
  40                 .name = "s5m8751-codec",
  41         },
  42 };
  43
  44 static struct mfd_cell s5m8763_devs[] = {
  45         {
  46                 .name = "s5m8763-pmic",
  47         }, {
  48                 .name = "s5m-rtc",
  49         }, {
  50                 .name = "s5m-charger",
  51         },
  52 };
  53
  54 static struct mfd_cell s5m8767_devs[] = {
  55         {
  56                 .name = "s5m8767-pmic",
  57         }, {
  58                 .name = "s5m-rtc",
  59         },
  60 };
  61
  62 static struct mfd_cell s2mps11_devs[] = {
  63         {
  64                 .name = "s2mps11-pmic",
  65         }, {
  66                 .name = "s2mps11-clk",
  67         }
  68 };
  69
  70 #ifdef CONFIG_OF
  71 static struct of_device_id sec_dt_match[] = {
  72         {       .compatible = "samsung,s5m8767-pmic",
  73                 .data = (void *)S5M8767X,
  74         },
  75         {       .compatible = "samsung,s2mps11-pmic",
  76                 .data = (void *)S2MPS11X,
  77         },
  78         {},
  79 };
  80 #endif
  81
  82 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
  83 {
  84         return regmap_read(sec_pmic->regmap_pmic, reg, dest);
  85 }
  86 EXPORT_SYMBOL_GPL(sec_reg_read);
  87
  88 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
  89 {
  90         return regmap_bulk_read(sec_pmic->regmap_pmic, reg, buf, count);
  91 }
  92 EXPORT_SYMBOL_GPL(sec_bulk_read);
  93
  94 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
  95 {
  96         return regmap_write(sec_pmic->regmap_pmic, reg, value);
  97 }
  98 EXPORT_SYMBOL_GPL(sec_reg_write);
  99
 100 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
 101 {
 102         return regmap_raw_write(sec_pmic->regmap_pmic, reg, buf, count);
 103 }
 104 EXPORT_SYMBOL_GPL(sec_bulk_write);
 105
 106 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
 107 {
 108         return regmap_update_bits(sec_pmic->regmap_pmic, reg, mask, val);
 109 }
 110 EXPORT_SYMBOL_GPL(sec_reg_update);
 111
 112 static bool s2mps11_volatile(struct device *dev, unsigned int reg)
 113 {
 114         switch (reg) {
 115         case S2MPS11_REG_INT1M:
 116         case S2MPS11_REG_INT2M:
 117         case S2MPS11_REG_INT3M:
 118                 return false;
 119         default:
 120                 return true;
 121         }
 122 }
 123
 124 static bool s5m8763_volatile(struct device *dev, unsigned int reg)
 125 {
 126         switch (reg) {
 127         case S5M8763_REG_IRQM1:
 128         case S5M8763_REG_IRQM2:
 129         case S5M8763_REG_IRQM3:
 130         case S5M8763_REG_IRQM4:
 131                 return false;
 132         default:
 133                 return true;
 134         }
 135 }
 136
 137 static struct regmap_config sec_regmap_config = {
 138         .reg_bits = 8,
 139         .val_bits = 8,
 140 };
 141
 142 static struct regmap_config s2mps11_regmap_config = {
 143         .reg_bits = 8,
 144         .val_bits = 8,
 145
 146         .max_register = S2MPS11_REG_L38CTRL,
 147         .volatile_reg = s2mps11_volatile,
 148         .cache_type = REGCACHE_FLAT,
 149 };
 150
 151 static struct regmap_config s5m8763_regmap_config = {
 152         .reg_bits = 8,
 153         .val_bits = 8,
 154
 155         .max_register = S5M8763_REG_LBCNFG2,
 156         .volatile_reg = s5m8763_volatile,
 157         .cache_type = REGCACHE_FLAT,
 158 };
 159
 160 static struct regmap_config s5m8767_regmap_config = {
 161         .reg_bits = 8,
 162         .val_bits = 8,
 163
 164         .max_register = S5M8767_REG_LDO28CTRL,
 165         .volatile_reg = s2mps11_volatile,
 166         .cache_type = REGCACHE_FLAT,
 167 };
 168
 169 static const struct regmap_config sec_rtc_regmap_config = {
 170         .reg_bits = 8,
 171         .val_bits = 8,
 172 };
 173
 174 #ifdef CONFIG_OF
 175 /*
 176  * Only the common platform data elements for s5m8767 are parsed here from the
 177  * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
 178  * others have to parse their own platform data elements from device tree.
 179  *
 180  * The s5m8767 platform data structure is instantiated here and the drivers for
 181  * the sub-modules need not instantiate another instance while parsing their
 182  * platform data.
 183  */
 184 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 185                                         struct device *dev)
 186 {
 187         struct sec_platform_data *pd;
 188
 189         pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
 190         if (!pd) {
 191                 dev_err(dev, "could not allocate memory for pdata\n");
 192                 return ERR_PTR(-ENOMEM);
 193         }
 194
 195         /*
 196          * ToDo: the 'wakeup' member in the platform data is more of a linux
 197          * specfic information. Hence, there is no binding for that yet and
 198          * not parsed here.
 199          */
 200
 201         return pd;
 202 }
 203 #else
 204 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 205                                         struct device *dev)
 206 {
 207         return 0;
 208 }
 209 #endif
 210
 211 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
 212                                                 const struct i2c_device_id *id)
 213 {
 214 #ifdef CONFIG_OF
 215         if (i2c->dev.of_node) {
 216                 const struct of_device_id *match;
 217                 match = of_match_node(sec_dt_match, i2c->dev.of_node);
 218                 return (int)match->data;
 219         }
 220 #endif
 221         return (int)id->driver_data;
 222 }
 223
 224 static int sec_pmic_probe(struct i2c_client *i2c,
 225                             const struct i2c_device_id *id)
 226 {
 227         struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
 228         const struct regmap_config *regmap;
 229         struct sec_pmic_dev *sec_pmic;
 230         int ret;
 231
 232         sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
 233                                 GFP_KERNEL);
 234         if (sec_pmic == NULL)
 235                 return -ENOMEM;
 236
 237         i2c_set_clientdata(i2c, sec_pmic);
 238         sec_pmic->dev = &i2c->dev;
 239         sec_pmic->i2c = i2c;
 240         sec_pmic->irq = i2c->irq;
 241         sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
 242
 243         if (sec_pmic->dev->of_node) {
 244                 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
 245                 if (IS_ERR(pdata)) {
 246                         ret = PTR_ERR(pdata);
 247                         return ret;
 248                 }
 249                 pdata->device_type = sec_pmic->type;
 250         }
 251         if (pdata) {
 252                 sec_pmic->device_type = pdata->device_type;
 253                 sec_pmic->ono = pdata->ono;
 254                 sec_pmic->irq_base = pdata->irq_base;
 255                 sec_pmic->wakeup = pdata->wakeup;
 256                 sec_pmic->pdata = pdata;
 257         }
 258
 259         switch (sec_pmic->device_type) {
 260         case S2MPS11X:
 261                 regmap = &s2mps11_regmap_config;
 262                 break;
 263         case S5M8763X:
 264                 regmap = &s5m8763_regmap_config;
 265                 break;
 266         case S5M8767X:
 267                 regmap = &s5m8767_regmap_config;
 268                 break;
 269         default:
 270                 regmap = &sec_regmap_config;
 271                 break;
 272         }
 273
 274         sec_pmic->regmap_pmic = devm_regmap_init_i2c(i2c, regmap);
 275         if (IS_ERR(sec_pmic->regmap_pmic)) {
 276                 ret = PTR_ERR(sec_pmic->regmap_pmic);
 277                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 278                         ret);
 279                 return ret;
 280         }
 281
 282         sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
 283         i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
 284
 285         sec_pmic->regmap_rtc = devm_regmap_init_i2c(sec_pmic->rtc,
 286                         &sec_rtc_regmap_config);
 287         if (IS_ERR(sec_pmic->regmap_rtc)) {
 288                 ret = PTR_ERR(sec_pmic->regmap_rtc);
 289                 dev_err(&i2c->dev, "Failed to allocate RTC register map: %d\n",
 290                         ret);
 291                 return ret;
 292         }
 293
 294         if (pdata && pdata->cfg_pmic_irq)
 295                 pdata->cfg_pmic_irq();
 296
 297         sec_irq_init(sec_pmic);
 298
 299         pm_runtime_set_active(sec_pmic->dev);
 300
 301         switch (sec_pmic->device_type) {
 302         case S5M8751X:
 303                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
 304                                       ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
 305                 break;
 306         case S5M8763X:
 307                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
 308                                       ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
 309                 break;
 310         case S5M8767X:
 311                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
 312                                       ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
 313                 break;
 314         case S2MPS11X:
 315                 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
 316                                       ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
 317                 break;
 318         default:
 319                 /* If this happens the probe function is problem */
 320                 BUG();
 321         }
 322
 323         if (ret)
 324                 goto err;
 325
 326         return ret;
 327
 328 err:
 329         sec_irq_exit(sec_pmic);
 330         i2c_unregister_device(sec_pmic->rtc);
 331         return ret;
 332 }
 333
 334 static int sec_pmic_remove(struct i2c_client *i2c)
 335 {
 336         struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 337
 338         mfd_remove_devices(sec_pmic->dev);
 339         sec_irq_exit(sec_pmic);
 340         i2c_unregister_device(sec_pmic->rtc);
 341         return 0;
 342 }
 343
 344 static const struct i2c_device_id sec_pmic_id[] = {
 345         { "sec_pmic", 0 },
 346         { }
 347 };
 348 MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
 349
 350 static struct i2c_driver sec_pmic_driver = {
 351         .driver = {
 352                    .name = "sec_pmic",
 353                    .owner = THIS_MODULE,
 354                    .of_match_table = of_match_ptr(sec_dt_match),
 355         },
 356         .probe = sec_pmic_probe,
 357         .remove = sec_pmic_remove,
 358         .id_table = sec_pmic_id,
 359 };
 360
 361 static int __init sec_pmic_init(void)
 362 {
 363         return i2c_add_driver(&sec_pmic_driver);
 364 }
 365
 366 subsys_initcall(sec_pmic_init);
 367
 368 static void __exit sec_pmic_exit(void)
 369 {
 370         i2c_del_driver(&sec_pmic_driver);
 371 }
 372 module_exit(sec_pmic_exit);
 373
 374 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 375 MODULE_DESCRIPTION("Core support for the S5M MFD");
 376 MODULE_LICENSE("GPL");