1 /* 2 * Regulator Driver for Freescale MC13783 PMIC 3 * 4 * Copyright 2010 Yong Shen <yong.shen@linaro.org> 5 * Copyright (C) 2008 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de> 6 * Copyright 2009 Alberto Panizzo <maramaopercheseimorto@gmail.com> 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 */ 12 13 #include <linux/mfd/mc13783.h> 14 #include <linux/regulator/machine.h> 15 #include <linux/regulator/driver.h> 16 #include <linux/platform_device.h> 17 #include <linux/kernel.h> 18 #include <linux/slab.h> 19 #include <linux/init.h> 20 #include <linux/err.h> 21 #include <linux/module.h> 22 #include "mc13xxx.h" 23 24 #define MC13783_REG_SWITCHERS5 29 25 #define MC13783_REG_SWITCHERS5_SW3EN (1 << 20) 26 #define MC13783_REG_SWITCHERS5_SW3VSEL 18 27 #define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18) 28 29 #define MC13783_REG_REGULATORSETTING0 30 30 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2 31 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4 32 #define MC13783_REG_REGULATORSETTING0_VGENVSEL 6 33 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9 34 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11 35 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13 36 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14 37 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15 38 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16 39 40 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2) 41 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4) 42 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6) 43 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9) 44 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11) 45 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13) 46 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14) 47 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15) 48 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16) 49 50 #define MC13783_REG_REGULATORSETTING1 31 51 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0 52 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2 53 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4 54 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6 55 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9 56 57 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0) 58 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2) 59 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4) 60 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6) 61 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9) 62 63 #define MC13783_REG_REGULATORMODE0 32 64 #define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0) 65 #define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3) 66 #define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6) 67 #define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9) 68 #define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12) 69 #define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15) 70 #define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18) 71 #define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21) 72 73 #define MC13783_REG_REGULATORMODE1 33 74 #define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0) 75 #define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3) 76 #define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6) 77 #define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9) 78 #define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11) 79 #define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12) 80 #define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15) 81 #define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18) 82 #define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21) 83 84 #define MC13783_REG_POWERMISC 34 85 #define MC13783_REG_POWERMISC_GPO1EN (1 << 6) 86 #define MC13783_REG_POWERMISC_GPO2EN (1 << 8) 87 #define MC13783_REG_POWERMISC_GPO3EN (1 << 10) 88 #define MC13783_REG_POWERMISC_GPO4EN (1 << 12) 89 #define MC13783_REG_POWERMISC_PWGT1SPIEN (1 << 15) 90 #define MC13783_REG_POWERMISC_PWGT2SPIEN (1 << 16) 91 92 #define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15) 93 94 95 /* Voltage Values */ 96 static const unsigned int mc13783_sw3_val[] = { 97 5000000, 5000000, 5000000, 5500000, 98 }; 99 100 static const unsigned int mc13783_vaudio_val[] = { 101 2775000, 102 }; 103 104 static const unsigned int mc13783_viohi_val[] = { 105 2775000, 106 }; 107 108 static const unsigned int mc13783_violo_val[] = { 109 1200000, 1300000, 1500000, 1800000, 110 }; 111 112 static const unsigned int mc13783_vdig_val[] = { 113 1200000, 1300000, 1500000, 1800000, 114 }; 115 116 static const unsigned int mc13783_vgen_val[] = { 117 1200000, 1300000, 1500000, 1800000, 118 1100000, 2000000, 2775000, 2400000, 119 }; 120 121 static const unsigned int mc13783_vrfdig_val[] = { 122 1200000, 1500000, 1800000, 1875000, 123 }; 124 125 static const unsigned int mc13783_vrfref_val[] = { 126 2475000, 2600000, 2700000, 2775000, 127 }; 128 129 static const unsigned int mc13783_vrfcp_val[] = { 130 2700000, 2775000, 131 }; 132 133 static const unsigned int mc13783_vsim_val[] = { 134 1800000, 2900000, 3000000, 135 }; 136 137 static const unsigned int mc13783_vesim_val[] = { 138 1800000, 2900000, 139 }; 140 141 static const unsigned int mc13783_vcam_val[] = { 142 1500000, 1800000, 2500000, 2550000, 143 2600000, 2750000, 2800000, 3000000, 144 }; 145 146 static const unsigned int mc13783_vrfbg_val[] = { 147 1250000, 148 }; 149 150 static const unsigned int mc13783_vvib_val[] = { 151 1300000, 1800000, 2000000, 3000000, 152 }; 153 154 static const unsigned int mc13783_vmmc_val[] = { 155 1600000, 1800000, 2000000, 2600000, 156 2700000, 2800000, 2900000, 3000000, 157 }; 158 159 static const unsigned int mc13783_vrf_val[] = { 160 1500000, 1875000, 2700000, 2775000, 161 }; 162 163 static const unsigned int mc13783_gpo_val[] = { 164 3100000, 165 }; 166 167 static const unsigned int mc13783_pwgtdrv_val[] = { 168 5500000, 169 }; 170 171 static struct regulator_ops mc13783_gpo_regulator_ops; 172 173 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages) \ 174 MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \ 175 mc13xxx_regulator_ops) 176 177 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages) \ 178 MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \ 179 mc13xxx_fixed_regulator_ops) 180 181 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages) \ 182 MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \ 183 mc13783_gpo_regulator_ops) 184 185 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \ 186 MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages) 187 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \ 188 MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages) 189 190 static struct mc13xxx_regulator mc13783_regulators[] = { 191 MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val), 192 193 MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val), 194 MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val), 195 MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \ 196 mc13783_violo_val), 197 MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \ 198 mc13783_vdig_val), 199 MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \ 200 mc13783_vgen_val), 201 MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \ 202 mc13783_vrfdig_val), 203 MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \ 204 mc13783_vrfref_val), 205 MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \ 206 mc13783_vrfcp_val), 207 MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \ 208 mc13783_vsim_val), 209 MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \ 210 mc13783_vesim_val), 211 MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \ 212 mc13783_vcam_val), 213 MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val), 214 MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \ 215 mc13783_vvib_val), 216 MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \ 217 mc13783_vrf_val), 218 MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \ 219 mc13783_vrf_val), 220 MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \ 221 mc13783_vmmc_val), 222 MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \ 223 mc13783_vmmc_val), 224 MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val), 225 MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val), 226 MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val), 227 MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val), 228 MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val), 229 MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val), 230 }; 231 232 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask, 233 u32 val) 234 { 235 struct mc13xxx *mc13783 = priv->mc13xxx; 236 int ret; 237 u32 valread; 238 239 BUG_ON(val & ~mask); 240 241 ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread); 242 if (ret) 243 return ret; 244 245 /* Update the stored state for Power Gates. */ 246 priv->powermisc_pwgt_state = 247 (priv->powermisc_pwgt_state & ~mask) | val; 248 priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M; 249 250 /* Construct the new register value */ 251 valread = (valread & ~mask) | val; 252 /* Overwrite the PWGTxEN with the stored version */ 253 valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) | 254 priv->powermisc_pwgt_state; 255 256 return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread); 257 } 258 259 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev) 260 { 261 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 262 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; 263 int id = rdev_get_id(rdev); 264 int ret; 265 u32 en_val = mc13xxx_regulators[id].enable_bit; 266 267 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 268 269 /* Power Gate enable value is 0 */ 270 if (id == MC13783_REG_PWGT1SPI || 271 id == MC13783_REG_PWGT2SPI) 272 en_val = 0; 273 274 mc13xxx_lock(priv->mc13xxx); 275 ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, 276 en_val); 277 mc13xxx_unlock(priv->mc13xxx); 278 279 return ret; 280 } 281 282 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev) 283 { 284 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 285 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; 286 int id = rdev_get_id(rdev); 287 int ret; 288 u32 dis_val = 0; 289 290 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 291 292 /* Power Gate disable value is 1 */ 293 if (id == MC13783_REG_PWGT1SPI || 294 id == MC13783_REG_PWGT2SPI) 295 dis_val = mc13xxx_regulators[id].enable_bit; 296 297 mc13xxx_lock(priv->mc13xxx); 298 ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, 299 dis_val); 300 mc13xxx_unlock(priv->mc13xxx); 301 302 return ret; 303 } 304 305 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev) 306 { 307 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 308 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; 309 int ret, id = rdev_get_id(rdev); 310 unsigned int val; 311 312 mc13xxx_lock(priv->mc13xxx); 313 ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val); 314 mc13xxx_unlock(priv->mc13xxx); 315 316 if (ret) 317 return ret; 318 319 /* Power Gates state is stored in powermisc_pwgt_state 320 * where the meaning of bits is negated */ 321 val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) | 322 (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M); 323 324 return (val & mc13xxx_regulators[id].enable_bit) != 0; 325 } 326 327 static struct regulator_ops mc13783_gpo_regulator_ops = { 328 .enable = mc13783_gpo_regulator_enable, 329 .disable = mc13783_gpo_regulator_disable, 330 .is_enabled = mc13783_gpo_regulator_is_enabled, 331 .list_voltage = regulator_list_voltage_table, 332 .set_voltage = mc13xxx_fixed_regulator_set_voltage, 333 .get_voltage = mc13xxx_fixed_regulator_get_voltage, 334 }; 335 336 static int __devinit mc13783_regulator_probe(struct platform_device *pdev) 337 { 338 struct mc13xxx_regulator_priv *priv; 339 struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent); 340 struct mc13xxx_regulator_platform_data *pdata = 341 dev_get_platdata(&pdev->dev); 342 struct mc13xxx_regulator_init_data *init_data; 343 struct regulator_config config = { }; 344 int i, ret; 345 346 dev_dbg(&pdev->dev, "%s id %d\n", __func__, pdev->id); 347 348 if (!pdata) 349 return -EINVAL; 350 351 priv = devm_kzalloc(&pdev->dev, sizeof(*priv) + 352 pdata->num_regulators * sizeof(priv->regulators[0]), 353 GFP_KERNEL); 354 if (!priv) 355 return -ENOMEM; 356 357 priv->mc13xxx_regulators = mc13783_regulators; 358 priv->mc13xxx = mc13783; 359 360 for (i = 0; i < pdata->num_regulators; i++) { 361 struct regulator_desc *desc; 362 363 init_data = &pdata->regulators[i]; 364 desc = &mc13783_regulators[init_data->id].desc; 365 366 config.dev = &pdev->dev; 367 config.init_data = init_data->init_data; 368 config.driver_data = priv; 369 370 priv->regulators[i] = regulator_register(desc, &config); 371 if (IS_ERR(priv->regulators[i])) { 372 dev_err(&pdev->dev, "failed to register regulator %s\n", 373 mc13783_regulators[i].desc.name); 374 ret = PTR_ERR(priv->regulators[i]); 375 goto err; 376 } 377 } 378 379 platform_set_drvdata(pdev, priv); 380 381 return 0; 382 err: 383 while (--i >= 0) 384 regulator_unregister(priv->regulators[i]); 385 386 return ret; 387 } 388 389 static int __devexit mc13783_regulator_remove(struct platform_device *pdev) 390 { 391 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev); 392 struct mc13xxx_regulator_platform_data *pdata = 393 dev_get_platdata(&pdev->dev); 394 int i; 395 396 platform_set_drvdata(pdev, NULL); 397 398 for (i = 0; i < pdata->num_regulators; i++) 399 regulator_unregister(priv->regulators[i]); 400 401 return 0; 402 } 403 404 static struct platform_driver mc13783_regulator_driver = { 405 .driver = { 406 .name = "mc13783-regulator", 407 .owner = THIS_MODULE, 408 }, 409 .remove = __devexit_p(mc13783_regulator_remove), 410 .probe = mc13783_regulator_probe, 411 }; 412 413 static int __init mc13783_regulator_init(void) 414 { 415 return platform_driver_register(&mc13783_regulator_driver); 416 } 417 subsys_initcall(mc13783_regulator_init); 418 419 static void __exit mc13783_regulator_exit(void) 420 { 421 platform_driver_unregister(&mc13783_regulator_driver); 422 } 423 module_exit(mc13783_regulator_exit); 424 425 MODULE_LICENSE("GPL v2"); 426 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); 427 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC"); 428 MODULE_ALIAS("platform:mc13783-regulator"); 429