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_irq.h>
  21 #include <linux/interrupt.h>
  22 #include <linux/pm_runtime.h>
  23 #include <linux/mutex.h>
  24 #include <linux/mfd/core.h>
  25 #include <linux/mfd/samsung/core.h>
  26 #include <linux/mfd/samsung/irq.h>
  27 #include <linux/mfd/samsung/rtc.h>
  28 #include <linux/mfd/samsung/s2mps11.h>
  29 #include <linux/mfd/samsung/s5m8763.h>
  30 #include <linux/mfd/samsung/s5m8767.h>
  31 #include <linux/regmap.h>
  32
  33 static struct mfd_cell s5m8751_devs[] = {
  34         {
  35                 .name = "s5m8751-pmic",
  36         }, {
  37                 .name = "s5m-charger",
  38         }, {
  39                 .name = "s5m8751-codec",
  40         },
  41 };
  42
  43 static struct mfd_cell s5m8763_devs[] = {
  44         {
  45                 .name = "s5m8763-pmic",
  46         }, {
  47                 .name = "s5m-rtc",
  48         }, {
  49                 .name = "s5m-charger",
  50         },
  51 };
  52
  53 static struct mfd_cell s5m8767_devs[] = {
  54         {
  55                 .name = "s5m8767-pmic",
  56         }, {
  57                 .name = "s5m-rtc",
  58         },
  59 };
  60
  61 static struct mfd_cell s2mps11_devs[] = {
  62         {
  63                 .name = "s2mps11-pmic",
  64         }, {
  65                 .name = "s2mps11-clk",
  66         }
  67 };
  68
  69 #ifdef CONFIG_OF
  70 static struct of_device_id sec_dt_match[] = {
  71         {       .compatible = "samsung,s5m8767-pmic",
  72                 .data = (void *)S5M8767X,
  73         },
  74         {       .compatible = "samsung,s2mps11-pmic",
  75                 .data = (void *)S2MPS11X,
  76         },
  77         {},
  78 };
  79 #endif
  80
  81 int sec_reg_read(struct sec_pmic_dev *sec_pmic, u8 reg, void *dest)
  82 {
  83         return regmap_read(sec_pmic->regmap, reg, dest);
  84 }
  85 EXPORT_SYMBOL_GPL(sec_reg_read);
  86
  87 int sec_bulk_read(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
  88 {
  89         return regmap_bulk_read(sec_pmic->regmap, reg, buf, count);
  90 }
  91 EXPORT_SYMBOL_GPL(sec_bulk_read);
  92
  93 int sec_reg_write(struct sec_pmic_dev *sec_pmic, u8 reg, u8 value)
  94 {
  95         return regmap_write(sec_pmic->regmap, reg, value);
  96 }
  97 EXPORT_SYMBOL_GPL(sec_reg_write);
  98
  99 int sec_bulk_write(struct sec_pmic_dev *sec_pmic, u8 reg, int count, u8 *buf)
 100 {
 101         return regmap_raw_write(sec_pmic->regmap, reg, buf, count);
 102 }
 103 EXPORT_SYMBOL_GPL(sec_bulk_write);
 104
 105 int sec_reg_update(struct sec_pmic_dev *sec_pmic, u8 reg, u8 val, u8 mask)
 106 {
 107         return regmap_update_bits(sec_pmic->regmap, reg, mask, val);
 108 }
 109 EXPORT_SYMBOL_GPL(sec_reg_update);
 110
 111 static bool s2mps11_volatile(struct device *dev, unsigned int reg)
 112 {
 113         switch (reg) {
 114         case S2MPS11_REG_INT1M:
 115         case S2MPS11_REG_INT2M:
 116         case S2MPS11_REG_INT3M:
 117                 return false;
 118         default:
 119                 return true;
 120         }
 121 }
 122
 123 static bool s5m8763_volatile(struct device *dev, unsigned int reg)
 124 {
 125         switch (reg) {
 126         case S5M8763_REG_IRQM1:
 127         case S5M8763_REG_IRQM2:
 128         case S5M8763_REG_IRQM3:
 129         case S5M8763_REG_IRQM4:
 130                 return false;
 131         default:
 132                 return true;
 133         }
 134 }
 135
 136 static struct regmap_config sec_regmap_config = {
 137         .reg_bits = 8,
 138         .val_bits = 8,
 139 };
 140
 141 static struct regmap_config s2mps11_regmap_config = {
 142         .reg_bits = 8,
 143         .val_bits = 8,
 144
 145         .max_register = S2MPS11_REG_L38CTRL,
 146         .volatile_reg = s2mps11_volatile,
 147         .cache_type = REGCACHE_FLAT,
 148 };
 149
 150 static struct regmap_config s5m8763_regmap_config = {
 151         .reg_bits = 8,
 152         .val_bits = 8,
 153
 154         .max_register = S5M8763_REG_LBCNFG2,
 155         .volatile_reg = s5m8763_volatile,
 156         .cache_type = REGCACHE_FLAT,
 157 };
 158
 159 static struct regmap_config s5m8767_regmap_config = {
 160         .reg_bits = 8,
 161         .val_bits = 8,
 162
 163         .max_register = S5M8767_REG_LDO28CTRL,
 164         .volatile_reg = s2mps11_volatile,
 165         .cache_type = REGCACHE_FLAT,
 166 };
 167
 168 #ifdef CONFIG_OF
 169 /*
 170  * Only the common platform data elements for s5m8767 are parsed here from the
 171  * device tree. Other sub-modules of s5m8767 such as pmic, rtc , charger and
 172  * others have to parse their own platform data elements from device tree.
 173  *
 174  * The s5m8767 platform data structure is instantiated here and the drivers for
 175  * the sub-modules need not instantiate another instance while parsing their
 176  * platform data.
 177  */
 178 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 179                                         struct device *dev)
 180 {
 181         struct sec_platform_data *pd;
 182
 183         pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL);
 184         if (!pd) {
 185                 dev_err(dev, "could not allocate memory for pdata\n");
 186                 return ERR_PTR(-ENOMEM);
 187         }
 188
 189         /*
 190          * ToDo: the 'wakeup' member in the platform data is more of a linux
 191          * specfic information. Hence, there is no binding for that yet and
 192          * not parsed here.
 193          */
 194
 195         return pd;
 196 }
 197 #else
 198 static struct sec_platform_data *sec_pmic_i2c_parse_dt_pdata(
 199                                         struct device *dev)
 200 {
 201         return 0;
 202 }
 203 #endif
 204
 205 static inline int sec_i2c_get_driver_data(struct i2c_client *i2c,
 206                                                 const struct i2c_device_id *id)
 207 {
 208 #ifdef CONFIG_OF
 209         if (i2c->dev.of_node) {
 210                 const struct of_device_id *match;
 211                 match = of_match_node(sec_dt_match, i2c->dev.of_node);
 212                 return (int)match->data;
 213         }
 214 #endif
 215         return (int)id->driver_data;
 216 }
 217
 218 static int sec_pmic_probe(struct i2c_client *i2c,
 219                             const struct i2c_device_id *id)
 220 {
 221         struct sec_platform_data *pdata = dev_get_platdata(&i2c->dev);
 222         const struct regmap_config *regmap;
 223         struct sec_pmic_dev *sec_pmic;
 224         int ret;
 225
 226         sec_pmic = devm_kzalloc(&i2c->dev, sizeof(struct sec_pmic_dev),
 227                                 GFP_KERNEL);
 228         if (sec_pmic == NULL)
 229                 return -ENOMEM;
 230
 231         i2c_set_clientdata(i2c, sec_pmic);
 232         sec_pmic->dev = &i2c->dev;
 233         sec_pmic->i2c = i2c;
 234         sec_pmic->irq = i2c->irq;
 235         sec_pmic->type = sec_i2c_get_driver_data(i2c, id);
 236
 237         if (sec_pmic->dev->of_node) {
 238                 pdata = sec_pmic_i2c_parse_dt_pdata(sec_pmic->dev);
 239                 if (IS_ERR(pdata)) {
 240                         ret = PTR_ERR(pdata);
 241                         return ret;
 242                 }
 243                 pdata->device_type = sec_pmic->type;
 244         }
 245         if (pdata) {
 246                 sec_pmic->device_type = pdata->device_type;
 247                 sec_pmic->ono = pdata->ono;
 248                 sec_pmic->irq_base = pdata->irq_base;
 249                 sec_pmic->wakeup = pdata->wakeup;
 250                 sec_pmic->pdata = pdata;
 251         }
 252
 253         switch (sec_pmic->device_type) {
 254         case S2MPS11X:
 255                 regmap = &s2mps11_regmap_config;
 256                 break;
 257         case S5M8763X:
 258                 regmap = &s5m8763_regmap_config;
 259                 break;
 260         case S5M8767X:
 261                 regmap = &s5m8767_regmap_config;
 262                 break;
 263         default:
 264                 regmap = &sec_regmap_config;
 265                 break;
 266         }
 267
 268         sec_pmic->regmap = devm_regmap_init_i2c(i2c, regmap);
 269         if (IS_ERR(sec_pmic->regmap)) {
 270                 ret = PTR_ERR(sec_pmic->regmap);
 271                 dev_err(&i2c->dev, "Failed to allocate register map: %d\n",
 272                         ret);
 273                 return ret;
 274         }
 275
 276         sec_pmic->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR);
 277         if (!sec_pmic->rtc) {
 278                 dev_err(&i2c->dev, "Failed to allocate I2C for RTC\n");
 279                 return -ENODEV;
 280         }
 281         i2c_set_clientdata(sec_pmic->rtc, sec_pmic);
 282
 283         if (pdata && pdata->cfg_pmic_irq)
 284                 pdata->cfg_pmic_irq();
 285
 286         sec_irq_init(sec_pmic);
 287
 288         pm_runtime_set_active(sec_pmic->dev);
 289
 290         switch (sec_pmic->device_type) {
 291         case S5M8751X:
 292                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8751_devs,
 293                                       ARRAY_SIZE(s5m8751_devs), NULL, 0, NULL);
 294                 break;
 295         case S5M8763X:
 296                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8763_devs,
 297                                       ARRAY_SIZE(s5m8763_devs), NULL, 0, NULL);
 298                 break;
 299         case S5M8767X:
 300                 ret = mfd_add_devices(sec_pmic->dev, -1, s5m8767_devs,
 301                                       ARRAY_SIZE(s5m8767_devs), NULL, 0, NULL);
 302                 break;
 303         case S2MPS11X:
 304                 ret = mfd_add_devices(sec_pmic->dev, -1, s2mps11_devs,
 305                                       ARRAY_SIZE(s2mps11_devs), NULL, 0, NULL);
 306                 break;
 307         default:
 308                 /* If this happens the probe function is problem */
 309                 BUG();
 310         }
 311
 312         if (ret)
 313                 goto err;
 314
 315         return ret;
 316
 317 err:
 318         sec_irq_exit(sec_pmic);
 319         i2c_unregister_device(sec_pmic->rtc);
 320         return ret;
 321 }
 322
 323 static int sec_pmic_remove(struct i2c_client *i2c)
 324 {
 325         struct sec_pmic_dev *sec_pmic = i2c_get_clientdata(i2c);
 326
 327         mfd_remove_devices(sec_pmic->dev);
 328         sec_irq_exit(sec_pmic);
 329         i2c_unregister_device(sec_pmic->rtc);
 330         return 0;
 331 }
 332
 333 static const struct i2c_device_id sec_pmic_id[] = {
 334         { "sec_pmic", 0 },
 335         { }
 336 };
 337 MODULE_DEVICE_TABLE(i2c, sec_pmic_id);
 338
 339 static struct i2c_driver sec_pmic_driver = {
 340         .driver = {
 341                    .name = "sec_pmic",
 342                    .owner = THIS_MODULE,
 343                    .of_match_table = of_match_ptr(sec_dt_match),
 344         },
 345         .probe = sec_pmic_probe,
 346         .remove = sec_pmic_remove,
 347         .id_table = sec_pmic_id,
 348 };
 349
 350 static int __init sec_pmic_init(void)
 351 {
 352         return i2c_add_driver(&sec_pmic_driver);
 353 }
 354
 355 subsys_initcall(sec_pmic_init);
 356
 357 static void __exit sec_pmic_exit(void)
 358 {
 359         i2c_del_driver(&sec_pmic_driver);
 360 }
 361 module_exit(sec_pmic_exit);
 362
 363 MODULE_AUTHOR("Sangbeom Kim <sbkim73@samsung.com>");
 364 MODULE_DESCRIPTION("Core support for the S5M MFD");
 365 MODULE_LICENSE("GPL");