1/* NXP PCF50633 PMIC Driver 2 * 3 * (C) 2006-2008 by Openmoko, Inc. 4 * Author: Balaji Rao <balajirrao@openmoko.org> 5 * All rights reserved. 6 * 7 * Broken down from monstrous PCF50633 driver mainly by 8 * Harald Welte and Andy Green and Werner Almesberger 9 * 10 * This program is free software; you can redistribute it and/or modify it 11 * under the terms of the GNU General Public License as published by the 12 * Free Software Foundation; either version 2 of the License, or (at your 13 * option) any later version. 14 * 15 */ 16 17#include <linux/kernel.h> 18#include <linux/module.h> 19#include <linux/init.h> 20#include <linux/device.h> 21#include <linux/err.h> 22#include <linux/platform_device.h> 23 24#include <linux/mfd/pcf50633/core.h> 25#include <linux/mfd/pcf50633/pmic.h> 26 27#define PCF50633_REGULATOR(_name, _id, _n) \ 28 { \ 29 .name = _name, \ 30 .id = _id, \ 31 .ops = &pcf50633_regulator_ops, \ 32 .n_voltages = _n, \ 33 .type = REGULATOR_VOLTAGE, \ 34 .owner = THIS_MODULE, \ 35 } 36 37static const u8 pcf50633_regulator_registers[PCF50633_NUM_REGULATORS] = { 38 [PCF50633_REGULATOR_AUTO] = PCF50633_REG_AUTOOUT, 39 [PCF50633_REGULATOR_DOWN1] = PCF50633_REG_DOWN1OUT, 40 [PCF50633_REGULATOR_DOWN2] = PCF50633_REG_DOWN2OUT, 41 [PCF50633_REGULATOR_MEMLDO] = PCF50633_REG_MEMLDOOUT, 42 [PCF50633_REGULATOR_LDO1] = PCF50633_REG_LDO1OUT, 43 [PCF50633_REGULATOR_LDO2] = PCF50633_REG_LDO2OUT, 44 [PCF50633_REGULATOR_LDO3] = PCF50633_REG_LDO3OUT, 45 [PCF50633_REGULATOR_LDO4] = PCF50633_REG_LDO4OUT, 46 [PCF50633_REGULATOR_LDO5] = PCF50633_REG_LDO5OUT, 47 [PCF50633_REGULATOR_LDO6] = PCF50633_REG_LDO6OUT, 48 [PCF50633_REGULATOR_HCLDO] = PCF50633_REG_HCLDOOUT, 49}; 50 51/* Bits from voltage value */ 52static u8 auto_voltage_bits(unsigned int millivolts) 53{ 54 if (millivolts < 1800) 55 return 0; 56 if (millivolts > 3800) 57 return 0xff; 58 59 millivolts -= 625; 60 61 return millivolts / 25; 62} 63 64static u8 down_voltage_bits(unsigned int millivolts) 65{ 66 if (millivolts < 625) 67 return 0; 68 else if (millivolts > 3000) 69 return 0xff; 70 71 millivolts -= 625; 72 73 return millivolts / 25; 74} 75 76static u8 ldo_voltage_bits(unsigned int millivolts) 77{ 78 if (millivolts < 900) 79 return 0; 80 else if (millivolts > 3600) 81 return 0x1f; 82 83 millivolts -= 900; 84 return millivolts / 100; 85} 86 87/* Obtain voltage value from bits */ 88static unsigned int auto_voltage_value(u8 bits) 89{ 90 if (bits < 0x2f) 91 return 0; 92 93 return 625 + (bits * 25); 94} 95 96 97static unsigned int down_voltage_value(u8 bits) 98{ 99 return 625 + (bits * 25); 100} 101 102 103static unsigned int ldo_voltage_value(u8 bits) 104{ 105 bits &= 0x1f; 106 107 return 900 + (bits * 100); 108} 109 110static int pcf50633_regulator_set_voltage(struct regulator_dev *rdev, 111 int min_uV, int max_uV) 112{ 113 struct pcf50633 *pcf; 114 int regulator_id, millivolts; 115 u8 volt_bits, regnr; 116 117 pcf = rdev_get_drvdata(rdev); 118 119 regulator_id = rdev_get_id(rdev); 120 if (regulator_id >= PCF50633_NUM_REGULATORS) 121 return -EINVAL; 122 123 millivolts = min_uV / 1000; 124 125 regnr = pcf50633_regulator_registers[regulator_id]; 126 127 switch (regulator_id) { 128 case PCF50633_REGULATOR_AUTO: 129 volt_bits = auto_voltage_bits(millivolts); 130 break; 131 case PCF50633_REGULATOR_DOWN1: 132 volt_bits = down_voltage_bits(millivolts); 133 break; 134 case PCF50633_REGULATOR_DOWN2: 135 volt_bits = down_voltage_bits(millivolts); 136 break; 137 case PCF50633_REGULATOR_LDO1: 138 case PCF50633_REGULATOR_LDO2: 139 case PCF50633_REGULATOR_LDO3: 140 case PCF50633_REGULATOR_LDO4: 141 case PCF50633_REGULATOR_LDO5: 142 case PCF50633_REGULATOR_LDO6: 143 case PCF50633_REGULATOR_HCLDO: 144 volt_bits = ldo_voltage_bits(millivolts); 145 break; 146 default: 147 return -EINVAL; 148 } 149 150 return pcf50633_reg_write(pcf, regnr, volt_bits); 151} 152 153static int pcf50633_regulator_voltage_value(enum pcf50633_regulator_id id, 154 u8 bits) 155{ 156 int millivolts; 157 158 switch (id) { 159 case PCF50633_REGULATOR_AUTO: 160 millivolts = auto_voltage_value(bits); 161 break; 162 case PCF50633_REGULATOR_DOWN1: 163 millivolts = down_voltage_value(bits); 164 break; 165 case PCF50633_REGULATOR_DOWN2: 166 millivolts = down_voltage_value(bits); 167 break; 168 case PCF50633_REGULATOR_LDO1: 169 case PCF50633_REGULATOR_LDO2: 170 case PCF50633_REGULATOR_LDO3: 171 case PCF50633_REGULATOR_LDO4: 172 case PCF50633_REGULATOR_LDO5: 173 case PCF50633_REGULATOR_LDO6: 174 case PCF50633_REGULATOR_HCLDO: 175 millivolts = ldo_voltage_value(bits); 176 break; 177 default: 178 return -EINVAL; 179 } 180 181 return millivolts * 1000; 182} 183 184static int pcf50633_regulator_get_voltage(struct regulator_dev *rdev) 185{ 186 struct pcf50633 *pcf; 187 int regulator_id; 188 u8 volt_bits, regnr; 189 190 pcf = rdev_get_drvdata(rdev); 191 192 regulator_id = rdev_get_id(rdev); 193 if (regulator_id >= PCF50633_NUM_REGULATORS) 194 return -EINVAL; 195 196 regnr = pcf50633_regulator_registers[regulator_id]; 197 198 volt_bits = pcf50633_reg_read(pcf, regnr); 199 200 return pcf50633_regulator_voltage_value(regulator_id, volt_bits); 201} 202 203static int pcf50633_regulator_list_voltage(struct regulator_dev *rdev, 204 unsigned int index) 205{ 206 struct pcf50633 *pcf; 207 int regulator_id; 208 209 pcf = rdev_get_drvdata(rdev); 210 211 regulator_id = rdev_get_id(rdev); 212 213 switch (regulator_id) { 214 case PCF50633_REGULATOR_AUTO: 215 index += 0x2f; 216 break; 217 case PCF50633_REGULATOR_HCLDO: 218 index += 0x01; 219 break; 220 default: 221 break; 222 } 223 224 return pcf50633_regulator_voltage_value(regulator_id, index); 225} 226 227static int pcf50633_regulator_enable(struct regulator_dev *rdev) 228{ 229 struct pcf50633 *pcf = rdev_get_drvdata(rdev); 230 int regulator_id; 231 u8 regnr; 232 233 regulator_id = rdev_get_id(rdev); 234 if (regulator_id >= PCF50633_NUM_REGULATORS) 235 return -EINVAL; 236 237 /* The *ENA register is always one after the *OUT register */ 238 regnr = pcf50633_regulator_registers[regulator_id] + 1; 239 240 return pcf50633_reg_set_bit_mask(pcf, regnr, PCF50633_REGULATOR_ON, 241 PCF50633_REGULATOR_ON); 242} 243 244static int pcf50633_regulator_disable(struct regulator_dev *rdev) 245{ 246 struct pcf50633 *pcf = rdev_get_drvdata(rdev); 247 int regulator_id; 248 u8 regnr; 249 250 regulator_id = rdev_get_id(rdev); 251 if (regulator_id >= PCF50633_NUM_REGULATORS) 252 return -EINVAL; 253 254 /* the *ENA register is always one after the *OUT register */ 255 regnr = pcf50633_regulator_registers[regulator_id] + 1; 256 257 return pcf50633_reg_set_bit_mask(pcf, regnr, 258 PCF50633_REGULATOR_ON, 0); 259} 260 261static int pcf50633_regulator_is_enabled(struct regulator_dev *rdev) 262{ 263 struct pcf50633 *pcf = rdev_get_drvdata(rdev); 264 int regulator_id = rdev_get_id(rdev); 265 u8 regnr; 266 267 regulator_id = rdev_get_id(rdev); 268 if (regulator_id >= PCF50633_NUM_REGULATORS) 269 return -EINVAL; 270 271 /* the *ENA register is always one after the *OUT register */ 272 regnr = pcf50633_regulator_registers[regulator_id] + 1; 273 274 return pcf50633_reg_read(pcf, regnr) & PCF50633_REGULATOR_ON; 275} 276 277static struct regulator_ops pcf50633_regulator_ops = { 278 .set_voltage = pcf50633_regulator_set_voltage, 279 .get_voltage = pcf50633_regulator_get_voltage, 280 .list_voltage = pcf50633_regulator_list_voltage, 281 .enable = pcf50633_regulator_enable, 282 .disable = pcf50633_regulator_disable, 283 .is_enabled = pcf50633_regulator_is_enabled, 284}; 285 286static struct regulator_desc regulators[] = { 287 [PCF50633_REGULATOR_AUTO] = 288 PCF50633_REGULATOR("auto", PCF50633_REGULATOR_AUTO, 80), 289 [PCF50633_REGULATOR_DOWN1] = 290 PCF50633_REGULATOR("down1", PCF50633_REGULATOR_DOWN1, 95), 291 [PCF50633_REGULATOR_DOWN2] = 292 PCF50633_REGULATOR("down2", PCF50633_REGULATOR_DOWN2, 95), 293 [PCF50633_REGULATOR_LDO1] = 294 PCF50633_REGULATOR("ldo1", PCF50633_REGULATOR_LDO1, 27), 295 [PCF50633_REGULATOR_LDO2] = 296 PCF50633_REGULATOR("ldo2", PCF50633_REGULATOR_LDO2, 27), 297 [PCF50633_REGULATOR_LDO3] = 298 PCF50633_REGULATOR("ldo3", PCF50633_REGULATOR_LDO3, 27), 299 [PCF50633_REGULATOR_LDO4] = 300 PCF50633_REGULATOR("ldo4", PCF50633_REGULATOR_LDO4, 27), 301 [PCF50633_REGULATOR_LDO5] = 302 PCF50633_REGULATOR("ldo5", PCF50633_REGULATOR_LDO5, 27), 303 [PCF50633_REGULATOR_LDO6] = 304 PCF50633_REGULATOR("ldo6", PCF50633_REGULATOR_LDO6, 27), 305 [PCF50633_REGULATOR_HCLDO] = 306 PCF50633_REGULATOR("hcldo", PCF50633_REGULATOR_HCLDO, 26), 307 [PCF50633_REGULATOR_MEMLDO] = 308 PCF50633_REGULATOR("memldo", PCF50633_REGULATOR_MEMLDO, 0), 309}; 310 311static int __devinit pcf50633_regulator_probe(struct platform_device *pdev) 312{ 313 struct regulator_dev *rdev; 314 struct pcf50633 *pcf; 315 316 /* Already set by core driver */ 317 pcf = dev_to_pcf50633(pdev->dev.parent); 318 319 rdev = regulator_register(®ulators[pdev->id], &pdev->dev, 320 pdev->dev.platform_data, pcf); 321 if (IS_ERR(rdev)) 322 return PTR_ERR(rdev); 323 324 platform_set_drvdata(pdev, rdev); 325 326 if (pcf->pdata->regulator_registered) 327 pcf->pdata->regulator_registered(pcf, pdev->id); 328 329 return 0; 330} 331 332static int __devexit pcf50633_regulator_remove(struct platform_device *pdev) 333{ 334 struct regulator_dev *rdev = platform_get_drvdata(pdev); 335 336 platform_set_drvdata(pdev, NULL); 337 regulator_unregister(rdev); 338 339 return 0; 340} 341 342static struct platform_driver pcf50633_regulator_driver = { 343 .driver = { 344 .name = "pcf50633-regltr", 345 }, 346 .probe = pcf50633_regulator_probe, 347 .remove = __devexit_p(pcf50633_regulator_remove), 348}; 349 350static int __init pcf50633_regulator_init(void) 351{ 352 return platform_driver_register(&pcf50633_regulator_driver); 353} 354subsys_initcall(pcf50633_regulator_init); 355 356static void __exit pcf50633_regulator_exit(void) 357{ 358 platform_driver_unregister(&pcf50633_regulator_driver); 359} 360module_exit(pcf50633_regulator_exit); 361 362MODULE_AUTHOR("Balaji Rao <balajirrao@openmoko.org>"); 363MODULE_DESCRIPTION("PCF50633 regulator driver"); 364MODULE_LICENSE("GPL"); 365MODULE_ALIAS("platform:pcf50633-regulator"); 366