1/* 2 * Regulators driver for Marvell 88PM800 3 * 4 * Copyright (C) 2012 Marvell International Ltd. 5 * Joseph(Yossi) Hanin <yhanin@marvell.com> 6 * Yi Zhang <yizhang@marvell.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#include <linux/module.h> 13#include <linux/moduleparam.h> 14#include <linux/init.h> 15#include <linux/err.h> 16#include <linux/regmap.h> 17#include <linux/regulator/driver.h> 18#include <linux/regulator/machine.h> 19#include <linux/mfd/88pm80x.h> 20#include <linux/delay.h> 21#include <linux/io.h> 22#include <linux/of.h> 23#include <linux/regulator/of_regulator.h> 24 25/* LDO1 with DVC[0..3] */ 26#define PM800_LDO1_VOUT (0x08) /* VOUT1 */ 27#define PM800_LDO1_VOUT_2 (0x09) 28#define PM800_LDO1_VOUT_3 (0x0A) 29#define PM800_LDO2_VOUT (0x0B) 30#define PM800_LDO3_VOUT (0x0C) 31#define PM800_LDO4_VOUT (0x0D) 32#define PM800_LDO5_VOUT (0x0E) 33#define PM800_LDO6_VOUT (0x0F) 34#define PM800_LDO7_VOUT (0x10) 35#define PM800_LDO8_VOUT (0x11) 36#define PM800_LDO9_VOUT (0x12) 37#define PM800_LDO10_VOUT (0x13) 38#define PM800_LDO11_VOUT (0x14) 39#define PM800_LDO12_VOUT (0x15) 40#define PM800_LDO13_VOUT (0x16) 41#define PM800_LDO14_VOUT (0x17) 42#define PM800_LDO15_VOUT (0x18) 43#define PM800_LDO16_VOUT (0x19) 44#define PM800_LDO17_VOUT (0x1A) 45#define PM800_LDO18_VOUT (0x1B) 46#define PM800_LDO19_VOUT (0x1C) 47 48/* BUCK1 with DVC[0..3] */ 49#define PM800_BUCK1 (0x3C) 50#define PM800_BUCK1_1 (0x3D) 51#define PM800_BUCK1_2 (0x3E) 52#define PM800_BUCK1_3 (0x3F) 53#define PM800_BUCK2 (0x40) 54#define PM800_BUCK3 (0x41) 55#define PM800_BUCK4 (0x42) 56#define PM800_BUCK4_1 (0x43) 57#define PM800_BUCK4_2 (0x44) 58#define PM800_BUCK4_3 (0x45) 59#define PM800_BUCK5 (0x46) 60 61#define PM800_BUCK_ENA (0x50) 62#define PM800_LDO_ENA1_1 (0x51) 63#define PM800_LDO_ENA1_2 (0x52) 64#define PM800_LDO_ENA1_3 (0x53) 65 66#define PM800_LDO_ENA2_1 (0x56) 67#define PM800_LDO_ENA2_2 (0x57) 68#define PM800_LDO_ENA2_3 (0x58) 69 70#define PM800_BUCK1_MISC1 (0x78) 71#define PM800_BUCK3_MISC1 (0x7E) 72#define PM800_BUCK4_MISC1 (0x81) 73#define PM800_BUCK5_MISC1 (0x84) 74 75struct pm800_regulator_info { 76 struct regulator_desc desc; 77 int max_ua; 78}; 79 80struct pm800_regulators { 81 struct regulator_dev *regulators[PM800_ID_RG_MAX]; 82 struct pm80x_chip *chip; 83 struct regmap *map; 84}; 85 86/* 87 * vreg - the buck regs string. 88 * ereg - the string for the enable register. 89 * ebit - the bit number in the enable register. 90 * amax - the current 91 * Buck has 2 kinds of voltage steps. It is easy to find voltage by ranges, 92 * not the constant voltage table. 93 * n_volt - Number of available selectors 94 */ 95#define PM800_BUCK(vreg, ereg, ebit, amax, volt_ranges, n_volt) \ 96{ \ 97 .desc = { \ 98 .name = #vreg, \ 99 .ops = &pm800_volt_range_ops, \ 100 .type = REGULATOR_VOLTAGE, \ 101 .id = PM800_ID_##vreg, \ 102 .owner = THIS_MODULE, \ 103 .n_voltages = n_volt, \ 104 .linear_ranges = volt_ranges, \ 105 .n_linear_ranges = ARRAY_SIZE(volt_ranges), \ 106 .vsel_reg = PM800_##vreg, \ 107 .vsel_mask = 0x7f, \ 108 .enable_reg = PM800_##ereg, \ 109 .enable_mask = 1 << (ebit), \ 110 }, \ 111 .max_ua = (amax), \ 112} 113 114/* 115 * vreg - the LDO regs string 116 * ereg - the string for the enable register. 117 * ebit - the bit number in the enable register. 118 * amax - the current 119 * volt_table - the LDO voltage table 120 * For all the LDOes, there are too many ranges. Using volt_table will be 121 * simpler and faster. 122 */ 123#define PM800_LDO(vreg, ereg, ebit, amax, ldo_volt_table) \ 124{ \ 125 .desc = { \ 126 .name = #vreg, \ 127 .ops = &pm800_volt_table_ops, \ 128 .type = REGULATOR_VOLTAGE, \ 129 .id = PM800_ID_##vreg, \ 130 .owner = THIS_MODULE, \ 131 .n_voltages = ARRAY_SIZE(ldo_volt_table), \ 132 .vsel_reg = PM800_##vreg##_VOUT, \ 133 .vsel_mask = 0x1f, \ 134 .enable_reg = PM800_##ereg, \ 135 .enable_mask = 1 << (ebit), \ 136 .volt_table = ldo_volt_table, \ 137 }, \ 138 .max_ua = (amax), \ 139} 140 141/* Ranges are sorted in ascending order. */ 142static const struct regulator_linear_range buck1_volt_range[] = { 143 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500), 144 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x54, 50000), 145}; 146 147/* BUCK 2~5 have same ranges. */ 148static const struct regulator_linear_range buck2_5_volt_range[] = { 149 REGULATOR_LINEAR_RANGE(600000, 0, 0x4f, 12500), 150 REGULATOR_LINEAR_RANGE(1600000, 0x50, 0x72, 50000), 151}; 152 153static const unsigned int ldo1_volt_table[] = { 154 600000, 650000, 700000, 750000, 800000, 850000, 900000, 950000, 155 1000000, 1050000, 1100000, 1150000, 1200000, 1300000, 1400000, 1500000, 156}; 157 158static const unsigned int ldo2_volt_table[] = { 159 1700000, 1800000, 1900000, 2000000, 2100000, 2500000, 2700000, 2800000, 160}; 161 162/* LDO 3~17 have same voltage table. */ 163static const unsigned int ldo3_17_volt_table[] = { 164 1200000, 1250000, 1700000, 1800000, 1850000, 1900000, 2500000, 2600000, 165 2700000, 2750000, 2800000, 2850000, 2900000, 3000000, 3100000, 3300000, 166}; 167 168/* LDO 18~19 have same voltage table. */ 169static const unsigned int ldo18_19_volt_table[] = { 170 1700000, 1800000, 1900000, 2500000, 2800000, 2900000, 3100000, 3300000, 171}; 172 173static int pm800_get_current_limit(struct regulator_dev *rdev) 174{ 175 struct pm800_regulator_info *info = rdev_get_drvdata(rdev); 176 177 return info->max_ua; 178} 179 180static struct regulator_ops pm800_volt_range_ops = { 181 .list_voltage = regulator_list_voltage_linear_range, 182 .map_voltage = regulator_map_voltage_linear_range, 183 .set_voltage_sel = regulator_set_voltage_sel_regmap, 184 .get_voltage_sel = regulator_get_voltage_sel_regmap, 185 .enable = regulator_enable_regmap, 186 .disable = regulator_disable_regmap, 187 .is_enabled = regulator_is_enabled_regmap, 188 .get_current_limit = pm800_get_current_limit, 189}; 190 191static struct regulator_ops pm800_volt_table_ops = { 192 .list_voltage = regulator_list_voltage_table, 193 .map_voltage = regulator_map_voltage_iterate, 194 .set_voltage_sel = regulator_set_voltage_sel_regmap, 195 .get_voltage_sel = regulator_get_voltage_sel_regmap, 196 .enable = regulator_enable_regmap, 197 .disable = regulator_disable_regmap, 198 .is_enabled = regulator_is_enabled_regmap, 199 .get_current_limit = pm800_get_current_limit, 200}; 201 202/* The array is indexed by id(PM800_ID_XXX) */ 203static struct pm800_regulator_info pm800_regulator_info[] = { 204 PM800_BUCK(BUCK1, BUCK_ENA, 0, 3000000, buck1_volt_range, 0x55), 205 PM800_BUCK(BUCK2, BUCK_ENA, 1, 1200000, buck2_5_volt_range, 0x73), 206 PM800_BUCK(BUCK3, BUCK_ENA, 2, 1200000, buck2_5_volt_range, 0x73), 207 PM800_BUCK(BUCK4, BUCK_ENA, 3, 1200000, buck2_5_volt_range, 0x73), 208 PM800_BUCK(BUCK5, BUCK_ENA, 4, 1200000, buck2_5_volt_range, 0x73), 209 210 PM800_LDO(LDO1, LDO_ENA1_1, 0, 200000, ldo1_volt_table), 211 PM800_LDO(LDO2, LDO_ENA1_1, 1, 10000, ldo2_volt_table), 212 PM800_LDO(LDO3, LDO_ENA1_1, 2, 300000, ldo3_17_volt_table), 213 PM800_LDO(LDO4, LDO_ENA1_1, 3, 300000, ldo3_17_volt_table), 214 PM800_LDO(LDO5, LDO_ENA1_1, 4, 300000, ldo3_17_volt_table), 215 PM800_LDO(LDO6, LDO_ENA1_1, 5, 300000, ldo3_17_volt_table), 216 PM800_LDO(LDO7, LDO_ENA1_1, 6, 300000, ldo3_17_volt_table), 217 PM800_LDO(LDO8, LDO_ENA1_1, 7, 300000, ldo3_17_volt_table), 218 PM800_LDO(LDO9, LDO_ENA1_2, 0, 300000, ldo3_17_volt_table), 219 PM800_LDO(LDO10, LDO_ENA1_2, 1, 300000, ldo3_17_volt_table), 220 PM800_LDO(LDO11, LDO_ENA1_2, 2, 300000, ldo3_17_volt_table), 221 PM800_LDO(LDO12, LDO_ENA1_2, 3, 300000, ldo3_17_volt_table), 222 PM800_LDO(LDO13, LDO_ENA1_2, 4, 300000, ldo3_17_volt_table), 223 PM800_LDO(LDO14, LDO_ENA1_2, 5, 300000, ldo3_17_volt_table), 224 PM800_LDO(LDO15, LDO_ENA1_2, 6, 300000, ldo3_17_volt_table), 225 PM800_LDO(LDO16, LDO_ENA1_2, 7, 300000, ldo3_17_volt_table), 226 PM800_LDO(LDO17, LDO_ENA1_3, 0, 300000, ldo3_17_volt_table), 227 PM800_LDO(LDO18, LDO_ENA1_3, 1, 200000, ldo18_19_volt_table), 228 PM800_LDO(LDO19, LDO_ENA1_3, 2, 200000, ldo18_19_volt_table), 229}; 230 231#define PM800_REGULATOR_OF_MATCH(_name, _id) \ 232 [PM800_ID_##_id] = { \ 233 .name = #_name, \ 234 .driver_data = &pm800_regulator_info[PM800_ID_##_id], \ 235 } 236 237static struct of_regulator_match pm800_regulator_matches[] = { 238 PM800_REGULATOR_OF_MATCH(buck1, BUCK1), 239 PM800_REGULATOR_OF_MATCH(buck2, BUCK2), 240 PM800_REGULATOR_OF_MATCH(buck3, BUCK3), 241 PM800_REGULATOR_OF_MATCH(buck4, BUCK4), 242 PM800_REGULATOR_OF_MATCH(buck5, BUCK5), 243 PM800_REGULATOR_OF_MATCH(ldo1, LDO1), 244 PM800_REGULATOR_OF_MATCH(ldo2, LDO2), 245 PM800_REGULATOR_OF_MATCH(ldo3, LDO3), 246 PM800_REGULATOR_OF_MATCH(ldo4, LDO4), 247 PM800_REGULATOR_OF_MATCH(ldo5, LDO5), 248 PM800_REGULATOR_OF_MATCH(ldo6, LDO6), 249 PM800_REGULATOR_OF_MATCH(ldo7, LDO7), 250 PM800_REGULATOR_OF_MATCH(ldo8, LDO8), 251 PM800_REGULATOR_OF_MATCH(ldo9, LDO9), 252 PM800_REGULATOR_OF_MATCH(ldo10, LDO10), 253 PM800_REGULATOR_OF_MATCH(ldo11, LDO11), 254 PM800_REGULATOR_OF_MATCH(ldo12, LDO12), 255 PM800_REGULATOR_OF_MATCH(ldo13, LDO13), 256 PM800_REGULATOR_OF_MATCH(ldo14, LDO14), 257 PM800_REGULATOR_OF_MATCH(ldo15, LDO15), 258 PM800_REGULATOR_OF_MATCH(ldo16, LDO16), 259 PM800_REGULATOR_OF_MATCH(ldo17, LDO17), 260 PM800_REGULATOR_OF_MATCH(ldo18, LDO18), 261 PM800_REGULATOR_OF_MATCH(ldo19, LDO19), 262}; 263 264static int pm800_regulator_dt_init(struct platform_device *pdev) 265{ 266 struct device_node *np = pdev->dev.of_node; 267 int ret; 268 269 ret = of_regulator_match(&pdev->dev, np, 270 pm800_regulator_matches, 271 ARRAY_SIZE(pm800_regulator_matches)); 272 if (ret < 0) 273 return ret; 274 275 return 0; 276} 277 278static int pm800_regulator_probe(struct platform_device *pdev) 279{ 280 struct pm80x_chip *chip = dev_get_drvdata(pdev->dev.parent); 281 struct pm80x_platform_data *pdata = dev_get_platdata(pdev->dev.parent); 282 struct pm800_regulators *pm800_data; 283 struct pm800_regulator_info *info; 284 struct regulator_config config = { }; 285 struct regulator_init_data *init_data; 286 int i, ret; 287 288 if (!pdata || pdata->num_regulators == 0) { 289 if (IS_ENABLED(CONFIG_OF)) { 290 ret = pm800_regulator_dt_init(pdev); 291 if (ret) 292 return ret; 293 } else { 294 return -ENODEV; 295 } 296 } else if (pdata->num_regulators) { 297 unsigned int count = 0; 298 299 /* Check whether num_regulator is valid. */ 300 for (i = 0; i < ARRAY_SIZE(pdata->regulators); i++) { 301 if (pdata->regulators[i]) 302 count++; 303 } 304 if (count != pdata->num_regulators) 305 return -EINVAL; 306 } else { 307 return -EINVAL; 308 } 309 310 pm800_data = devm_kzalloc(&pdev->dev, sizeof(*pm800_data), 311 GFP_KERNEL); 312 if (!pm800_data) 313 return -ENOMEM; 314 315 pm800_data->map = chip->subchip->regmap_power; 316 pm800_data->chip = chip; 317 318 platform_set_drvdata(pdev, pm800_data); 319 320 for (i = 0; i < PM800_ID_RG_MAX; i++) { 321 if (!pdata || pdata->num_regulators == 0) 322 init_data = pm800_regulator_matches[i].init_data; 323 else 324 init_data = pdata->regulators[i]; 325 if (!init_data) 326 continue; 327 info = pm800_regulator_matches[i].driver_data; 328 config.dev = &pdev->dev; 329 config.init_data = init_data; 330 config.driver_data = info; 331 config.regmap = pm800_data->map; 332 config.of_node = pm800_regulator_matches[i].of_node; 333 334 pm800_data->regulators[i] = 335 regulator_register(&info->desc, &config); 336 if (IS_ERR(pm800_data->regulators[i])) { 337 ret = PTR_ERR(pm800_data->regulators[i]); 338 dev_err(&pdev->dev, "Failed to register %s\n", 339 info->desc.name); 340 341 while (--i >= 0) 342 regulator_unregister(pm800_data->regulators[i]); 343 344 return ret; 345 } 346 } 347 348 return 0; 349} 350 351static int pm800_regulator_remove(struct platform_device *pdev) 352{ 353 struct pm800_regulators *pm800_data = platform_get_drvdata(pdev); 354 int i; 355 356 for (i = 0; i < PM800_ID_RG_MAX; i++) 357 regulator_unregister(pm800_data->regulators[i]); 358 359 return 0; 360} 361 362static struct platform_driver pm800_regulator_driver = { 363 .driver = { 364 .name = "88pm80x-regulator", 365 .owner = THIS_MODULE, 366 }, 367 .probe = pm800_regulator_probe, 368 .remove = pm800_regulator_remove, 369}; 370 371module_platform_driver(pm800_regulator_driver); 372 373MODULE_LICENSE("GPL"); 374MODULE_AUTHOR("Joseph(Yossi) Hanin <yhanin@marvell.com>"); 375MODULE_DESCRIPTION("Regulator Driver for Marvell 88PM800 PMIC"); 376MODULE_ALIAS("platform:88pm800-regulator"); 377