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