| 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"); |