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 "mc13xxx.h" 22 23 #define MC13783_REG_SWITCHERS5 29 24 #define MC13783_REG_SWITCHERS5_SW3EN (1 << 20) 25 #define MC13783_REG_SWITCHERS5_SW3VSEL 18 26 #define MC13783_REG_SWITCHERS5_SW3VSEL_M (3 << 18) 27 28 #define MC13783_REG_REGULATORSETTING0 30 29 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL 2 30 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL 4 31 #define MC13783_REG_REGULATORSETTING0_VGENVSEL 6 32 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL 9 33 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL 11 34 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL 13 35 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL 14 36 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL 15 37 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL 16 38 39 #define MC13783_REG_REGULATORSETTING0_VIOLOVSEL_M (3 << 2) 40 #define MC13783_REG_REGULATORSETTING0_VDIGVSEL_M (3 << 4) 41 #define MC13783_REG_REGULATORSETTING0_VGENVSEL_M (7 << 6) 42 #define MC13783_REG_REGULATORSETTING0_VRFDIGVSEL_M (3 << 9) 43 #define MC13783_REG_REGULATORSETTING0_VRFREFVSEL_M (3 << 11) 44 #define MC13783_REG_REGULATORSETTING0_VRFCPVSEL_M (1 << 13) 45 #define MC13783_REG_REGULATORSETTING0_VSIMVSEL_M (1 << 14) 46 #define MC13783_REG_REGULATORSETTING0_VESIMVSEL_M (1 << 15) 47 #define MC13783_REG_REGULATORSETTING0_VCAMVSEL_M (7 << 16) 48 49 #define MC13783_REG_REGULATORSETTING1 31 50 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL 0 51 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL 2 52 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL 4 53 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL 6 54 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL 9 55 56 #define MC13783_REG_REGULATORSETTING1_VVIBVSEL_M (3 << 0) 57 #define MC13783_REG_REGULATORSETTING1_VRF1VSEL_M (3 << 2) 58 #define MC13783_REG_REGULATORSETTING1_VRF2VSEL_M (3 << 4) 59 #define MC13783_REG_REGULATORSETTING1_VMMC1VSEL_M (7 << 6) 60 #define MC13783_REG_REGULATORSETTING1_VMMC2VSEL_M (7 << 9) 61 62 #define MC13783_REG_REGULATORMODE0 32 63 #define MC13783_REG_REGULATORMODE0_VAUDIOEN (1 << 0) 64 #define MC13783_REG_REGULATORMODE0_VIOHIEN (1 << 3) 65 #define MC13783_REG_REGULATORMODE0_VIOLOEN (1 << 6) 66 #define MC13783_REG_REGULATORMODE0_VDIGEN (1 << 9) 67 #define MC13783_REG_REGULATORMODE0_VGENEN (1 << 12) 68 #define MC13783_REG_REGULATORMODE0_VRFDIGEN (1 << 15) 69 #define MC13783_REG_REGULATORMODE0_VRFREFEN (1 << 18) 70 #define MC13783_REG_REGULATORMODE0_VRFCPEN (1 << 21) 71 72 #define MC13783_REG_REGULATORMODE1 33 73 #define MC13783_REG_REGULATORMODE1_VSIMEN (1 << 0) 74 #define MC13783_REG_REGULATORMODE1_VESIMEN (1 << 3) 75 #define MC13783_REG_REGULATORMODE1_VCAMEN (1 << 6) 76 #define MC13783_REG_REGULATORMODE1_VRFBGEN (1 << 9) 77 #define MC13783_REG_REGULATORMODE1_VVIBEN (1 << 11) 78 #define MC13783_REG_REGULATORMODE1_VRF1EN (1 << 12) 79 #define MC13783_REG_REGULATORMODE1_VRF2EN (1 << 15) 80 #define MC13783_REG_REGULATORMODE1_VMMC1EN (1 << 18) 81 #define MC13783_REG_REGULATORMODE1_VMMC2EN (1 << 21) 82 83 #define MC13783_REG_POWERMISC 34 84 #define MC13783_REG_POWERMISC_GPO1EN (1 << 6) 85 #define MC13783_REG_POWERMISC_GPO2EN (1 << 8) 86 #define MC13783_REG_POWERMISC_GPO3EN (1 << 10) 87 #define MC13783_REG_POWERMISC_GPO4EN (1 << 12) 88 #define MC13783_REG_POWERMISC_PWGT1SPIEN (1 << 15) 89 #define MC13783_REG_POWERMISC_PWGT2SPIEN (1 << 16) 90 91 #define MC13783_REG_POWERMISC_PWGTSPI_M (3 << 15) 92 93 94 /* Voltage Values */ 95 static const int mc13783_sw3_val[] = { 96 5000000, 5000000, 5000000, 5500000, 97 }; 98 99 static const int mc13783_vaudio_val[] = { 100 2775000, 101 }; 102 103 static const int mc13783_viohi_val[] = { 104 2775000, 105 }; 106 107 static const int mc13783_violo_val[] = { 108 1200000, 1300000, 1500000, 1800000, 109 }; 110 111 static const int mc13783_vdig_val[] = { 112 1200000, 1300000, 1500000, 1800000, 113 }; 114 115 static const int mc13783_vgen_val[] = { 116 1200000, 1300000, 1500000, 1800000, 117 1100000, 2000000, 2775000, 2400000, 118 }; 119 120 static const int mc13783_vrfdig_val[] = { 121 1200000, 1500000, 1800000, 1875000, 122 }; 123 124 static const int mc13783_vrfref_val[] = { 125 2475000, 2600000, 2700000, 2775000, 126 }; 127 128 static const int mc13783_vrfcp_val[] = { 129 2700000, 2775000, 130 }; 131 132 static const int mc13783_vsim_val[] = { 133 1800000, 2900000, 3000000, 134 }; 135 136 static const int mc13783_vesim_val[] = { 137 1800000, 2900000, 138 }; 139 140 static const int mc13783_vcam_val[] = { 141 1500000, 1800000, 2500000, 2550000, 142 2600000, 2750000, 2800000, 3000000, 143 }; 144 145 static const int mc13783_vrfbg_val[] = { 146 1250000, 147 }; 148 149 static const int mc13783_vvib_val[] = { 150 1300000, 1800000, 2000000, 3000000, 151 }; 152 153 static const int mc13783_vmmc_val[] = { 154 1600000, 1800000, 2000000, 2600000, 155 2700000, 2800000, 2900000, 3000000, 156 }; 157 158 static const int mc13783_vrf_val[] = { 159 1500000, 1875000, 2700000, 2775000, 160 }; 161 162 static const int mc13783_gpo_val[] = { 163 3100000, 164 }; 165 166 static const int mc13783_pwgtdrv_val[] = { 167 5500000, 168 }; 169 170 static struct regulator_ops mc13783_gpo_regulator_ops; 171 172 #define MC13783_DEFINE(prefix, name, reg, vsel_reg, voltages) \ 173 MC13xxx_DEFINE(MC13783_REG_, name, reg, vsel_reg, voltages, \ 174 mc13xxx_regulator_ops) 175 176 #define MC13783_FIXED_DEFINE(prefix, name, reg, voltages) \ 177 MC13xxx_FIXED_DEFINE(MC13783_REG_, name, reg, voltages, \ 178 mc13xxx_fixed_regulator_ops) 179 180 #define MC13783_GPO_DEFINE(prefix, name, reg, voltages) \ 181 MC13xxx_GPO_DEFINE(MC13783_REG_, name, reg, voltages, \ 182 mc13783_gpo_regulator_ops) 183 184 #define MC13783_DEFINE_SW(_name, _reg, _vsel_reg, _voltages) \ 185 MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages) 186 #define MC13783_DEFINE_REGU(_name, _reg, _vsel_reg, _voltages) \ 187 MC13783_DEFINE(REG, _name, _reg, _vsel_reg, _voltages) 188 189 static struct mc13xxx_regulator mc13783_regulators[] = { 190 MC13783_DEFINE_SW(SW3, SWITCHERS5, SWITCHERS5, mc13783_sw3_val), 191 192 MC13783_FIXED_DEFINE(REG, VAUDIO, REGULATORMODE0, mc13783_vaudio_val), 193 MC13783_FIXED_DEFINE(REG, VIOHI, REGULATORMODE0, mc13783_viohi_val), 194 MC13783_DEFINE_REGU(VIOLO, REGULATORMODE0, REGULATORSETTING0, \ 195 mc13783_violo_val), 196 MC13783_DEFINE_REGU(VDIG, REGULATORMODE0, REGULATORSETTING0, \ 197 mc13783_vdig_val), 198 MC13783_DEFINE_REGU(VGEN, REGULATORMODE0, REGULATORSETTING0, \ 199 mc13783_vgen_val), 200 MC13783_DEFINE_REGU(VRFDIG, REGULATORMODE0, REGULATORSETTING0, \ 201 mc13783_vrfdig_val), 202 MC13783_DEFINE_REGU(VRFREF, REGULATORMODE0, REGULATORSETTING0, \ 203 mc13783_vrfref_val), 204 MC13783_DEFINE_REGU(VRFCP, REGULATORMODE0, REGULATORSETTING0, \ 205 mc13783_vrfcp_val), 206 MC13783_DEFINE_REGU(VSIM, REGULATORMODE1, REGULATORSETTING0, \ 207 mc13783_vsim_val), 208 MC13783_DEFINE_REGU(VESIM, REGULATORMODE1, REGULATORSETTING0, \ 209 mc13783_vesim_val), 210 MC13783_DEFINE_REGU(VCAM, REGULATORMODE1, REGULATORSETTING0, \ 211 mc13783_vcam_val), 212 MC13783_FIXED_DEFINE(REG, VRFBG, REGULATORMODE1, mc13783_vrfbg_val), 213 MC13783_DEFINE_REGU(VVIB, REGULATORMODE1, REGULATORSETTING1, \ 214 mc13783_vvib_val), 215 MC13783_DEFINE_REGU(VRF1, REGULATORMODE1, REGULATORSETTING1, \ 216 mc13783_vrf_val), 217 MC13783_DEFINE_REGU(VRF2, REGULATORMODE1, REGULATORSETTING1, \ 218 mc13783_vrf_val), 219 MC13783_DEFINE_REGU(VMMC1, REGULATORMODE1, REGULATORSETTING1, \ 220 mc13783_vmmc_val), 221 MC13783_DEFINE_REGU(VMMC2, REGULATORMODE1, REGULATORSETTING1, \ 222 mc13783_vmmc_val), 223 MC13783_GPO_DEFINE(REG, GPO1, POWERMISC, mc13783_gpo_val), 224 MC13783_GPO_DEFINE(REG, GPO2, POWERMISC, mc13783_gpo_val), 225 MC13783_GPO_DEFINE(REG, GPO3, POWERMISC, mc13783_gpo_val), 226 MC13783_GPO_DEFINE(REG, GPO4, POWERMISC, mc13783_gpo_val), 227 MC13783_GPO_DEFINE(REG, PWGT1SPI, POWERMISC, mc13783_pwgtdrv_val), 228 MC13783_GPO_DEFINE(REG, PWGT2SPI, POWERMISC, mc13783_pwgtdrv_val), 229 }; 230 231 static int mc13783_powermisc_rmw(struct mc13xxx_regulator_priv *priv, u32 mask, 232 u32 val) 233 { 234 struct mc13xxx *mc13783 = priv->mc13xxx; 235 int ret; 236 u32 valread; 237 238 BUG_ON(val & ~mask); 239 240 ret = mc13xxx_reg_read(mc13783, MC13783_REG_POWERMISC, &valread); 241 if (ret) 242 return ret; 243 244 /* Update the stored state for Power Gates. */ 245 priv->powermisc_pwgt_state = 246 (priv->powermisc_pwgt_state & ~mask) | val; 247 priv->powermisc_pwgt_state &= MC13783_REG_POWERMISC_PWGTSPI_M; 248 249 /* Construct the new register value */ 250 valread = (valread & ~mask) | val; 251 /* Overwrite the PWGTxEN with the stored version */ 252 valread = (valread & ~MC13783_REG_POWERMISC_PWGTSPI_M) | 253 priv->powermisc_pwgt_state; 254 255 return mc13xxx_reg_write(mc13783, MC13783_REG_POWERMISC, valread); 256 } 257 258 static int mc13783_gpo_regulator_enable(struct regulator_dev *rdev) 259 { 260 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 261 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; 262 int id = rdev_get_id(rdev); 263 int ret; 264 u32 en_val = mc13xxx_regulators[id].enable_bit; 265 266 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 267 268 /* Power Gate enable value is 0 */ 269 if (id == MC13783_REG_PWGT1SPI || 270 id == MC13783_REG_PWGT2SPI) 271 en_val = 0; 272 273 mc13xxx_lock(priv->mc13xxx); 274 ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, 275 en_val); 276 mc13xxx_unlock(priv->mc13xxx); 277 278 return ret; 279 } 280 281 static int mc13783_gpo_regulator_disable(struct regulator_dev *rdev) 282 { 283 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 284 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; 285 int id = rdev_get_id(rdev); 286 int ret; 287 u32 dis_val = 0; 288 289 dev_dbg(rdev_get_dev(rdev), "%s id: %d\n", __func__, id); 290 291 /* Power Gate disable value is 1 */ 292 if (id == MC13783_REG_PWGT1SPI || 293 id == MC13783_REG_PWGT2SPI) 294 dis_val = mc13xxx_regulators[id].enable_bit; 295 296 mc13xxx_lock(priv->mc13xxx); 297 ret = mc13783_powermisc_rmw(priv, mc13xxx_regulators[id].enable_bit, 298 dis_val); 299 mc13xxx_unlock(priv->mc13xxx); 300 301 return ret; 302 } 303 304 static int mc13783_gpo_regulator_is_enabled(struct regulator_dev *rdev) 305 { 306 struct mc13xxx_regulator_priv *priv = rdev_get_drvdata(rdev); 307 struct mc13xxx_regulator *mc13xxx_regulators = priv->mc13xxx_regulators; 308 int ret, id = rdev_get_id(rdev); 309 unsigned int val; 310 311 mc13xxx_lock(priv->mc13xxx); 312 ret = mc13xxx_reg_read(priv->mc13xxx, mc13xxx_regulators[id].reg, &val); 313 mc13xxx_unlock(priv->mc13xxx); 314 315 if (ret) 316 return ret; 317 318 /* Power Gates state is stored in powermisc_pwgt_state 319 * where the meaning of bits is negated */ 320 val = (val & ~MC13783_REG_POWERMISC_PWGTSPI_M) | 321 (priv->powermisc_pwgt_state ^ MC13783_REG_POWERMISC_PWGTSPI_M); 322 323 return (val & mc13xxx_regulators[id].enable_bit) != 0; 324 } 325 326 static struct regulator_ops mc13783_gpo_regulator_ops = { 327 .enable = mc13783_gpo_regulator_enable, 328 .disable = mc13783_gpo_regulator_disable, 329 .is_enabled = mc13783_gpo_regulator_is_enabled, 330 .list_voltage = mc13xxx_regulator_list_voltage, 331 .set_voltage = mc13xxx_fixed_regulator_set_voltage, 332 .get_voltage = mc13xxx_fixed_regulator_get_voltage, 333 }; 334 335 static int __devinit mc13783_regulator_probe(struct platform_device *pdev) 336 { 337 struct mc13xxx_regulator_priv *priv; 338 struct mc13xxx *mc13783 = dev_get_drvdata(pdev->dev.parent); 339 struct mc13783_regulator_platform_data *pdata = 340 dev_get_platdata(&pdev->dev); 341 struct mc13783_regulator_init_data *init_data; 342 int i, ret; 343 344 dev_dbg(&pdev->dev, "%s id %d\n", __func__, pdev->id); 345 346 priv = kzalloc(sizeof(*priv) + 347 pdata->num_regulators * sizeof(priv->regulators[0]), 348 GFP_KERNEL); 349 if (!priv) 350 return -ENOMEM; 351 352 priv->mc13xxx_regulators = mc13783_regulators; 353 priv->mc13xxx = mc13783; 354 355 for (i = 0; i < pdata->num_regulators; i++) { 356 init_data = &pdata->regulators[i]; 357 priv->regulators[i] = regulator_register( 358 &mc13783_regulators[init_data->id].desc, 359 &pdev->dev, init_data->init_data, priv); 360 361 if (IS_ERR(priv->regulators[i])) { 362 dev_err(&pdev->dev, "failed to register regulator %s\n", 363 mc13783_regulators[i].desc.name); 364 ret = PTR_ERR(priv->regulators[i]); 365 goto err; 366 } 367 } 368 369 platform_set_drvdata(pdev, priv); 370 371 return 0; 372 err: 373 while (--i >= 0) 374 regulator_unregister(priv->regulators[i]); 375 376 kfree(priv); 377 378 return ret; 379 } 380 381 static int __devexit mc13783_regulator_remove(struct platform_device *pdev) 382 { 383 struct mc13xxx_regulator_priv *priv = platform_get_drvdata(pdev); 384 struct mc13783_regulator_platform_data *pdata = 385 dev_get_platdata(&pdev->dev); 386 int i; 387 388 platform_set_drvdata(pdev, NULL); 389 390 for (i = 0; i < pdata->num_regulators; i++) 391 regulator_unregister(priv->regulators[i]); 392 393 kfree(priv); 394 return 0; 395 } 396 397 static struct platform_driver mc13783_regulator_driver = { 398 .driver = { 399 .name = "mc13783-regulator", 400 .owner = THIS_MODULE, 401 }, 402 .remove = __devexit_p(mc13783_regulator_remove), 403 .probe = mc13783_regulator_probe, 404 }; 405 406 static int __init mc13783_regulator_init(void) 407 { 408 return platform_driver_register(&mc13783_regulator_driver); 409 } 410 subsys_initcall(mc13783_regulator_init); 411 412 static void __exit mc13783_regulator_exit(void) 413 { 414 platform_driver_unregister(&mc13783_regulator_driver); 415 } 416 module_exit(mc13783_regulator_exit); 417 418 MODULE_LICENSE("GPL v2"); 419 MODULE_AUTHOR("Sascha Hauer <s.hauer@pengutronix.de>"); 420 MODULE_DESCRIPTION("Regulator Driver for Freescale MC13783 PMIC"); 421 MODULE_ALIAS("platform:mc13783-regulator"); 422