drivers/regulator/mc13783.c

   1 /*
   2  * Regulator Driver for Freescale MC13783 PMIC
   3  *
   4  * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/mfd/mc13783-private.h>
  12 #include <linux/regulator/machine.h>
  13 #include <linux/regulator/driver.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/mfd/mc13783.h>
  16 #include <linux/kernel.h>
  17 #include <linux/init.h>
  18 #include <linux/err.h>
  19
  20 struct mc13783_regulator {
  21         struct regulator_desc desc;
  22         int reg;
  23         int enable_bit;
  24 };
  25
  26 static struct regulator_ops mc13783_regulator_ops;
  27
  28 static struct mc13783_regulator mc13783_regulators[] = {
  29         [MC13783_SW_SW3] = {
  30                 .desc = {
  31                         .name   = "SW_SW3",
  32                         .ops    = &mc13783_regulator_ops,
  33                         .type   = REGULATOR_VOLTAGE,
  34                         .id     = MC13783_SW_SW3,
  35                         .owner  = THIS_MODULE,
  36                 },
  37                 .reg = MC13783_REG_SWITCHERS_5,
  38                 .enable_bit = MC13783_SWCTRL_SW3_EN,
  39         },
  40         [MC13783_SW_PLL] = {
  41                 .desc = {
  42                         .name   = "SW_PLL",
  43                         .ops    = &mc13783_regulator_ops,
  44                         .type   = REGULATOR_VOLTAGE,
  45                         .id     = MC13783_SW_PLL,
  46                         .owner  = THIS_MODULE,
  47                 },
  48                 .reg = MC13783_REG_SWITCHERS_4,
  49                 .enable_bit = MC13783_SWCTRL_PLL_EN,
  50         },
  51         [MC13783_REGU_VAUDIO] = {
  52                 .desc = {
  53                         .name   = "REGU_VAUDIO",
  54                         .ops    = &mc13783_regulator_ops,
  55                         .type   = REGULATOR_VOLTAGE,
  56                         .id     = MC13783_REGU_VAUDIO,
  57                         .owner  = THIS_MODULE,
  58                 },
  59                 .reg = MC13783_REG_REGULATOR_MODE_0,
  60                 .enable_bit = MC13783_REGCTRL_VAUDIO_EN,
  61         },
  62         [MC13783_REGU_VIOHI] = {
  63                 .desc = {
  64                         .name   = "REGU_VIOHI",
  65                         .ops    = &mc13783_regulator_ops,
  66                         .type   = REGULATOR_VOLTAGE,
  67                         .id     = MC13783_REGU_VIOHI,
  68                         .owner  = THIS_MODULE,
  69                 },
  70                 .reg = MC13783_REG_REGULATOR_MODE_0,
  71                 .enable_bit = MC13783_REGCTRL_VIOHI_EN,
  72         },
  73         [MC13783_REGU_VIOLO] = {
  74                 .desc = {
  75                         .name   = "REGU_VIOLO",
  76                         .ops    = &mc13783_regulator_ops,
  77                         .type   = REGULATOR_VOLTAGE,
  78                         .id     = MC13783_REGU_VIOLO,
  79                         .owner  = THIS_MODULE,
  80                 },
  81                 .reg = MC13783_REG_REGULATOR_MODE_0,
  82                 .enable_bit = MC13783_REGCTRL_VIOLO_EN,
  83         },
  84         [MC13783_REGU_VDIG] = {
  85                 .desc = {
  86                         .name   = "REGU_VDIG",
  87                         .ops    = &mc13783_regulator_ops,
  88                         .type   = REGULATOR_VOLTAGE,
  89                         .id     = MC13783_REGU_VDIG,
  90                         .owner  = THIS_MODULE,
  91                 },
  92                 .reg = MC13783_REG_REGULATOR_MODE_0,
  93                 .enable_bit = MC13783_REGCTRL_VDIG_EN,
  94         },
  95         [MC13783_REGU_VGEN] = {
  96                 .desc = {
  97                         .name   = "REGU_VGEN",
  98                         .ops    = &mc13783_regulator_ops,
  99                         .type   = REGULATOR_VOLTAGE,
 100                         .id     = MC13783_REGU_VGEN,
 101                         .owner  = THIS_MODULE,
 102                 },
 103                 .reg = MC13783_REG_REGULATOR_MODE_0,
 104                 .enable_bit = MC13783_REGCTRL_VGEN_EN,
 105         },
 106         [MC13783_REGU_VRFDIG] = {
 107                 .desc = {
 108                         .name   = "REGU_VRFDIG",
 109                         .ops    = &mc13783_regulator_ops,
 110                         .type   = REGULATOR_VOLTAGE,
 111                         .id     = MC13783_REGU_VRFDIG,
 112                         .owner  = THIS_MODULE,
 113                 },
 114                 .reg = MC13783_REG_REGULATOR_MODE_0,
 115                 .enable_bit = MC13783_REGCTRL_VRFDIG_EN,
 116         },
 117         [MC13783_REGU_VRFREF] = {
 118                 .desc = {
 119                         .name   = "REGU_VRFREF",
 120                         .ops    = &mc13783_regulator_ops,
 121                         .type   = REGULATOR_VOLTAGE,
 122                         .id     = MC13783_REGU_VRFREF,
 123                         .owner  = THIS_MODULE,
 124                 },
 125                 .reg = MC13783_REG_REGULATOR_MODE_0,
 126                 .enable_bit = MC13783_REGCTRL_VRFREF_EN,
 127         },
 128         [MC13783_REGU_VRFCP] = {
 129                 .desc = {
 130                         .name   = "REGU_VRFCP",
 131                         .ops    = &mc13783_regulator_ops,
 132                         .type   = REGULATOR_VOLTAGE,
 133                         .id     = MC13783_REGU_VRFCP,
 134                         .owner  = THIS_MODULE,
 135                 },
 136                 .reg = MC13783_REG_REGULATOR_MODE_0,
 137                 .enable_bit = MC13783_REGCTRL_VRFCP_EN,
 138         },
 139         [MC13783_REGU_VSIM] = {
 140                 .desc = {
 141                         .name   = "REGU_VSIM",
 142                         .ops    = &mc13783_regulator_ops,
 143                         .type   = REGULATOR_VOLTAGE,
 144                         .id     = MC13783_REGU_VSIM,
 145                         .owner  = THIS_MODULE,
 146                 },
 147                 .reg = MC13783_REG_REGULATOR_MODE_1,
 148                 .enable_bit = MC13783_REGCTRL_VSIM_EN,
 149         },
 150         [MC13783_REGU_VESIM] = {
 151                 .desc = {
 152                         .name   = "REGU_VESIM",
 153                         .ops    = &mc13783_regulator_ops,
 154                         .type   = REGULATOR_VOLTAGE,
 155                         .id     = MC13783_REGU_VESIM,
 156                         .owner  = THIS_MODULE,
 157                 },
 158                 .reg = MC13783_REG_REGULATOR_MODE_1,
 159                 .enable_bit = MC13783_REGCTRL_VESIM_EN,
 160         },
 161         [MC13783_REGU_VCAM] = {
 162                 .desc = {
 163                         .name   = "REGU_VCAM",
 164                         .ops    = &mc13783_regulator_ops,
 165                         .type   = REGULATOR_VOLTAGE,
 166                         .id     = MC13783_REGU_VCAM,
 167                         .owner  = THIS_MODULE,
 168                 },
 169                 .reg = MC13783_REG_REGULATOR_MODE_1,
 170                 .enable_bit = MC13783_REGCTRL_VCAM_EN,
 171         },
 172         [MC13783_REGU_VRFBG] = {
 173                 .desc = {
 174                         .name   = "REGU_VRFBG",
 175                         .ops    = &mc13783_regulator_ops,
 176                         .type   = REGULATOR_VOLTAGE,
 177                         .id     = MC13783_REGU_VRFBG,
 178                         .owner  = THIS_MODULE,
 179                 },
 180                 .reg = MC13783_REG_REGULATOR_MODE_1,
 181                 .enable_bit = MC13783_REGCTRL_VRFBG_EN,
 182         },
 183         [MC13783_REGU_VVIB] = {
 184                 .desc = {
 185                         .name   = "REGU_VVIB",
 186                         .ops    = &mc13783_regulator_ops,
 187                         .type   = REGULATOR_VOLTAGE,
 188                         .id     = MC13783_REGU_VVIB,
 189                         .owner  = THIS_MODULE,
 190                 },
 191                 .reg = MC13783_REG_REGULATOR_MODE_1,
 192                 .enable_bit = MC13783_REGCTRL_VVIB_EN,
 193         },
 194         [MC13783_REGU_VRF1] = {
 195                 .desc = {
 196                         .name   = "REGU_VRF1",
 197                         .ops    = &mc13783_regulator_ops,
 198                         .type   = REGULATOR_VOLTAGE,
 199                         .id     = MC13783_REGU_VRF1,
 200                         .owner  = THIS_MODULE,
 201                 },
 202                 .reg = MC13783_REG_REGULATOR_MODE_1,
 203                 .enable_bit = MC13783_REGCTRL_VRF1_EN,
 204         },
 205         [MC13783_REGU_VRF2] = {
 206                 .desc = {
 207                         .name   = "REGU_VRF2",
 208                         .ops    = &mc13783_regulator_ops,
 209                         .type   = REGULATOR_VOLTAGE,
 210                         .id     = MC13783_REGU_VRF2,
 211                         .owner  = THIS_MODULE,
 212                 },
 213                 .reg = MC13783_REG_REGULATOR_MODE_1,
 214                 .enable_bit = MC13783_REGCTRL_VRF2_EN,
 215         },
 216         [MC13783_REGU_VMMC1] = {
 217                 .desc = {
 218                         .name   = "REGU_VMMC1",
 219                         .ops    = &mc13783_regulator_ops,
 220                         .type   = REGULATOR_VOLTAGE,
 221                         .id     = MC13783_REGU_VMMC1,
 222                         .owner  = THIS_MODULE,
 223                 },
 224                 .reg = MC13783_REG_REGULATOR_MODE_1,
 225                 .enable_bit = MC13783_REGCTRL_VMMC1_EN,
 226         },
 227         [MC13783_REGU_VMMC2] = {
 228                 .desc = {
 229                         .name   = "REGU_VMMC2",
 230                         .ops    = &mc13783_regulator_ops,
 231                         .type   = REGULATOR_VOLTAGE,
 232                         .id     = MC13783_REGU_VMMC2,
 233                         .owner  = THIS_MODULE,
 234                 },
 235                 .reg = MC13783_REG_REGULATOR_MODE_1,
 236                 .enable_bit = MC13783_REGCTRL_VMMC2_EN,
 237         },
 238         [MC13783_REGU_GPO1] = {
 239                 .desc = {
 240                         .name   = "REGU_GPO1",
 241                         .ops    = &mc13783_regulator_ops,
 242                         .type   = REGULATOR_VOLTAGE,
 243                         .id     = MC13783_REGU_GPO1,
 244                         .owner  = THIS_MODULE,
 245                 },
 246                 .reg = MC13783_REG_POWER_MISCELLANEOUS,
 247                 .enable_bit = MC13783_REGCTRL_GPO1_EN,
 248         },
 249         [MC13783_REGU_GPO2] = {
 250                 .desc = {
 251                         .name   = "REGU_GPO2",
 252                         .ops    = &mc13783_regulator_ops,
 253                         .type   = REGULATOR_VOLTAGE,
 254                         .id     = MC13783_REGU_GPO2,
 255                         .owner  = THIS_MODULE,
 256                 },
 257                 .reg = MC13783_REG_POWER_MISCELLANEOUS,
 258                 .enable_bit = MC13783_REGCTRL_GPO2_EN,
 259         },
 260         [MC13783_REGU_GPO3] = {
 261                 .desc = {
 262                         .name   = "REGU_GPO3",
 263                         .ops    = &mc13783_regulator_ops,
 264                         .type   = REGULATOR_VOLTAGE,
 265                         .id     = MC13783_REGU_GPO3,
 266                         .owner  = THIS_MODULE,
 267                 },
 268                 .reg = MC13783_REG_POWER_MISCELLANEOUS,
 269                 .enable_bit = MC13783_REGCTRL_GPO3_EN,
 270         },
 271         [MC13783_REGU_GPO4] = {
 272                 .desc = {
 273                         .name   = "REGU_GPO4",
 274                         .ops    = &mc13783_regulator_ops,
 275                         .type   = REGULATOR_VOLTAGE,
 276                         .id     = MC13783_REGU_GPO4,
 277                         .owner  = THIS_MODULE,
 278                 },
 279                 .reg = MC13783_REG_POWER_MISCELLANEOUS,
 280                 .enable_bit = MC13783_REGCTRL_GPO4_EN,
 281         },
 282 };
 283
 284 struct mc13783_priv {
 285         struct regulator_desc desc[ARRAY_SIZE(mc13783_regulators)];
 286         struct mc13783 *mc13783;
 287         struct regulator_dev *regulators[0];
 288 };
 289
 290 static int mc13783_enable(struct regulator_dev *rdev)
 291 {
 292         struct mc13783_priv *priv = rdev_get_drvdata(rdev);
 293         int id = rdev_get_id(rdev);
 294
 295         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 296
 297         return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
 298                         mc13783_regulators[id].enable_bit,
 299                         mc13783_regulators[id].enable_bit);
 300 }
 301
 302 static int mc13783_disable(struct regulator_dev *rdev)
 303 {
 304         struct mc13783_priv *priv = rdev_get_drvdata(rdev);
 305         int id = rdev_get_id(rdev);
 306
 307         dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id);
 308
 309         return mc13783_set_bits(priv->mc13783, mc13783_regulators[id].reg,
 310                         mc13783_regulators[id].enable_bit, 0);
 311 }
 312
 313 static int mc13783_is_enabled(struct regulator_dev *rdev)
 314 {
 315         struct mc13783_priv *priv = rdev_get_drvdata(rdev);
 316         int ret, id = rdev_get_id(rdev);
 317         unsigned int val;
 318
 319         ret = mc13783_reg_read(priv->mc13783, mc13783_regulators[id].reg, &val);
 320         if (ret)
 321                 return ret;
 322
 323         return (val & mc13783_regulators[id].enable_bit) != 0;
 324 }
 325
 326 static struct regulator_ops mc13783_regulator_ops = {
 327         .enable         = mc13783_enable,
 328         .disable        = mc13783_disable,
 329         .is_enabled     = mc13783_is_enabled,
 330 };
 331
 332 static int __devinit mc13783_regulator_probe(struct platform_device *pdev)
 333 {
 334         struct mc13783_priv *priv;
 335         struct mc13783 *mc13783 = dev_get_drvdata(pdev->dev.parent);
 336         struct mc13783_regulator_init_data *init_data;
 337         int i, ret;
 338
 339         dev_dbg(&pdev->dev, "mc13783_regulator_probe id %d\n", pdev->id);
 340
 341         priv = kzalloc(sizeof(*priv) + mc13783->num_regulators * sizeof(void *),
 342                         GFP_KERNEL);
 343         if (!priv)
 344                 return -ENOMEM;
 345
 346         priv->mc13783 = mc13783;
 347
 348         for (i = 0; i < mc13783->num_regulators; i++) {
 349                 init_data = &mc13783->regulators[i];
 350                 priv->regulators[i] = regulator_register(
 351                                 &mc13783_regulators[init_data->id].desc,
 352                                 &pdev->dev, init_data->init_data, priv);
 353
 354                 if (IS_ERR(priv->regulators[i])) {
 355                         dev_err(&pdev->dev, "failed to register regulator %s\n",
 356                                 mc13783_regulators[i].desc.name);
 357                         ret = PTR_ERR(priv->regulators[i]);
 358                         goto err;
 359                 }
 360         }
 361
 362         platform_set_drvdata(pdev, priv);
 363
 364         return 0;
 365 err:
 366         while (--i >= 0)
 367                 regulator_unregister(priv->regulators[i]);
 368
 369         kfree(priv);
 370
 371         return ret;
 372 }
 373
 374 static int __devexit mc13783_regulator_remove(struct platform_device *pdev)
 375 {
 376         struct mc13783_priv *priv = platform_get_drvdata(pdev);
 377         struct mc13783 *mc13783 = priv->mc13783;
 378         int i;
 379
 380         for (i = 0; i < mc13783->num_regulators; i++)
 381                 regulator_unregister(priv->regulators[i]);
 382
 383         return 0;
 384 }
 385
 386 static struct platform_driver mc13783_regulator_driver = {
 387         .driver = {
 388                 .name   = "mc13783-regulator",
 389                 .owner  = THIS_MODULE,
 390         },
 391         .remove         = __devexit_p(mc13783_regulator_remove),
 392 };
 393
 394 static int __init mc13783_regulator_init(void)
 395 {
 396         return platform_driver_probe(&mc13783_regulator_driver,
 397                         mc13783_regulator_probe);
 398 }
 399 subsys_initcall(mc13783_regulator_init);
 400
 401 static void __exit mc13783_regulator_exit(void)
 402 {
 403         platform_driver_unregister(&mc13783_regulator_driver);
 404 }
 405 module_exit(mc13783_regulator_exit);
 406
 407 MODULE_LICENSE("GPL");
 408 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de");
 409 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC");
 410 MODULE_ALIAS("platform:mc13783-regulator");