1 /* 2 * tps65218-regulator.c 3 * 4 * Regulator driver for TPS65218 PMIC 5 * 6 * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com/ 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License version 2 as 10 * published by the Free Software Foundation. 11 * 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 13 * kind, whether expressed or implied; without even the implied warranty 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License version 2 for more details. 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/module.h> 20 #include <linux/device.h> 21 #include <linux/init.h> 22 #include <linux/err.h> 23 #include <linux/platform_device.h> 24 #include <linux/of_device.h> 25 #include <linux/regulator/of_regulator.h> 26 #include <linux/regulator/driver.h> 27 #include <linux/regulator/machine.h> 28 #include <linux/mfd/tps65218.h> 29 30 enum tps65218_regulators { DCDC1, DCDC2, DCDC3, DCDC4, 31 DCDC5, DCDC6, LDO1, LS3 }; 32 33 #define TPS65218_REGULATOR(_name, _id, _type, _ops, _n, _vr, _vm, _er, _em, \ 34 _cr, _cm, _lr, _nlr, _delay, _fuv) \ 35 { \ 36 .name = _name, \ 37 .id = _id, \ 38 .ops = &_ops, \ 39 .n_voltages = _n, \ 40 .type = _type, \ 41 .owner = THIS_MODULE, \ 42 .vsel_reg = _vr, \ 43 .vsel_mask = _vm, \ 44 .csel_reg = _cr, \ 45 .csel_mask = _cm, \ 46 .enable_reg = _er, \ 47 .enable_mask = _em, \ 48 .volt_table = NULL, \ 49 .linear_ranges = _lr, \ 50 .n_linear_ranges = _nlr, \ 51 .ramp_delay = _delay, \ 52 .fixed_uV = _fuv \ 53 } \ 54 55 #define TPS65218_INFO(_id, _nm, _min, _max) \ 56 [_id] = { \ 57 .id = _id, \ 58 .name = _nm, \ 59 .min_uV = _min, \ 60 .max_uV = _max, \ 61 } 62 63 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { 64 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 65 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 66 }; 67 68 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { 69 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 70 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 71 }; 72 73 static const struct regulator_linear_range dcdc4_ranges[] = { 74 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 75 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), 76 }; 77 78 static struct tps_info tps65218_pmic_regs[] = { 79 TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000), 80 TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000), 81 TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000), 82 TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000), 83 TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000), 84 TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000), 85 TPS65218_INFO(LDO1, "LDO1", 900000, 3400000), 86 TPS65218_INFO(LS3, "LS3", -1, -1), 87 }; 88 89 #define TPS65218_OF_MATCH(comp, label) \ 90 { \ 91 .compatible = comp, \ 92 .data = &label, \ 93 } 94 95 static const struct of_device_id tps65218_of_match[] = { 96 TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]), 97 TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]), 98 TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]), 99 TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]), 100 TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]), 101 TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]), 102 TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]), 103 TPS65218_OF_MATCH("ti,tps65218-ls3", tps65218_pmic_regs[LS3]), 104 { } 105 }; 106 MODULE_DEVICE_TABLE(of, tps65218_of_match); 107 108 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, 109 unsigned selector) 110 { 111 int ret; 112 struct tps65218 *tps = rdev_get_drvdata(dev); 113 unsigned int rid = rdev_get_id(dev); 114 115 /* Set the voltage based on vsel value and write protect level is 2 */ 116 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 117 selector, TPS65218_PROTECT_L1); 118 119 /* Set GO bit for DCDC1/2 to initiate voltage transistion */ 120 switch (rid) { 121 case TPS65218_DCDC_1: 122 case TPS65218_DCDC_2: 123 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, 124 TPS65218_SLEW_RATE_GO, 125 TPS65218_SLEW_RATE_GO, 126 TPS65218_PROTECT_L1); 127 break; 128 } 129 130 return ret; 131 } 132 133 static int tps65218_pmic_enable(struct regulator_dev *dev) 134 { 135 struct tps65218 *tps = rdev_get_drvdata(dev); 136 int rid = rdev_get_id(dev); 137 138 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 139 return -EINVAL; 140 141 /* Enable the regulator and password protection is level 1 */ 142 return tps65218_set_bits(tps, dev->desc->enable_reg, 143 dev->desc->enable_mask, dev->desc->enable_mask, 144 TPS65218_PROTECT_L1); 145 } 146 147 static int tps65218_pmic_disable(struct regulator_dev *dev) 148 { 149 struct tps65218 *tps = rdev_get_drvdata(dev); 150 int rid = rdev_get_id(dev); 151 152 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 153 return -EINVAL; 154 155 /* Disable the regulator and password protection is level 1 */ 156 return tps65218_clear_bits(tps, dev->desc->enable_reg, 157 dev->desc->enable_mask, TPS65218_PROTECT_L1); 158 } 159 160 /* Operations permitted on DCDC1, DCDC2 */ 161 static struct regulator_ops tps65218_dcdc12_ops = { 162 .is_enabled = regulator_is_enabled_regmap, 163 .enable = tps65218_pmic_enable, 164 .disable = tps65218_pmic_disable, 165 .get_voltage_sel = regulator_get_voltage_sel_regmap, 166 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 167 .list_voltage = regulator_list_voltage_linear_range, 168 .map_voltage = regulator_map_voltage_linear_range, 169 .set_voltage_time_sel = regulator_set_voltage_time_sel, 170 }; 171 172 /* Operations permitted on DCDC3, DCDC4 and LDO1 */ 173 static struct regulator_ops tps65218_ldo1_dcdc34_ops = { 174 .is_enabled = regulator_is_enabled_regmap, 175 .enable = tps65218_pmic_enable, 176 .disable = tps65218_pmic_disable, 177 .get_voltage_sel = regulator_get_voltage_sel_regmap, 178 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 179 .list_voltage = regulator_list_voltage_linear_range, 180 .map_voltage = regulator_map_voltage_linear_range, 181 }; 182 183 static const int ls3_currents[] = { 100, 200, 500, 1000 }; 184 185 static int tps65218_pmic_set_input_current_lim(struct regulator_dev *dev, 186 int lim_uA) 187 { 188 unsigned int index = 0; 189 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 190 struct tps65218 *tps = rdev_get_drvdata(dev); 191 192 while (index < num_currents && ls3_currents[index] != lim_uA) 193 index++; 194 195 if (index == num_currents) 196 return -EINVAL; 197 198 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 199 index << 2, TPS65218_PROTECT_L1); 200 } 201 202 static int tps65218_pmic_set_current_limit(struct regulator_dev *dev, 203 int min_uA, int max_uA) 204 { 205 int index = 0; 206 unsigned int num_currents = ARRAY_SIZE(ls3_currents); 207 struct tps65218 *tps = rdev_get_drvdata(dev); 208 209 while (index < num_currents && ls3_currents[index] < max_uA) 210 index++; 211 212 index--; 213 214 if (index < 0 || ls3_currents[index] < min_uA) 215 return -EINVAL; 216 217 return tps65218_set_bits(tps, dev->desc->csel_reg, dev->desc->csel_mask, 218 index << 2, TPS65218_PROTECT_L1); 219 } 220 221 static int tps65218_pmic_get_current_limit(struct regulator_dev *dev) 222 { 223 int retval; 224 unsigned int index; 225 struct tps65218 *tps = rdev_get_drvdata(dev); 226 227 retval = tps65218_reg_read(tps, dev->desc->csel_reg, &index); 228 if (retval < 0) 229 return retval; 230 231 index = (index & dev->desc->csel_mask) >> 2; 232 233 return ls3_currents[index]; 234 } 235 236 static struct regulator_ops tps65218_ls3_ops = { 237 .is_enabled = regulator_is_enabled_regmap, 238 .enable = tps65218_pmic_enable, 239 .disable = tps65218_pmic_disable, 240 .set_input_current_limit = tps65218_pmic_set_input_current_lim, 241 .set_current_limit = tps65218_pmic_set_current_limit, 242 .get_current_limit = tps65218_pmic_get_current_limit, 243 }; 244 245 /* Operations permitted on DCDC5, DCDC6 */ 246 static struct regulator_ops tps65218_dcdc56_pmic_ops = { 247 .is_enabled = regulator_is_enabled_regmap, 248 .enable = tps65218_pmic_enable, 249 .disable = tps65218_pmic_disable, 250 }; 251 252 static const struct regulator_desc regulators[] = { 253 TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, REGULATOR_VOLTAGE, 254 tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC1, 255 TPS65218_CONTROL_DCDC1_MASK, TPS65218_REG_ENABLE1, 256 TPS65218_ENABLE1_DC1_EN, 0, 0, dcdc1_dcdc2_ranges, 257 2, 4000, 0), 258 TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, REGULATOR_VOLTAGE, 259 tps65218_dcdc12_ops, 64, TPS65218_REG_CONTROL_DCDC2, 260 TPS65218_CONTROL_DCDC2_MASK, TPS65218_REG_ENABLE1, 261 TPS65218_ENABLE1_DC2_EN, 0, 0, dcdc1_dcdc2_ranges, 262 2, 4000, 0), 263 TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, REGULATOR_VOLTAGE, 264 tps65218_ldo1_dcdc34_ops, 64, 265 TPS65218_REG_CONTROL_DCDC3, 266 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 267 TPS65218_ENABLE1_DC3_EN, 0, 0, ldo1_dcdc3_ranges, 2, 268 0, 0), 269 TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, REGULATOR_VOLTAGE, 270 tps65218_ldo1_dcdc34_ops, 53, 271 TPS65218_REG_CONTROL_DCDC4, 272 TPS65218_CONTROL_DCDC4_MASK, TPS65218_REG_ENABLE1, 273 TPS65218_ENABLE1_DC4_EN, 0, 0, dcdc4_ranges, 2, 274 0, 0), 275 TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, REGULATOR_VOLTAGE, 276 tps65218_dcdc56_pmic_ops, 1, -1, -1, 277 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC5_EN, 0, 0, 278 NULL, 0, 0, 1000000), 279 TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, REGULATOR_VOLTAGE, 280 tps65218_dcdc56_pmic_ops, 1, -1, -1, 281 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC6_EN, 0, 0, 282 NULL, 0, 0, 1800000), 283 TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, REGULATOR_VOLTAGE, 284 tps65218_ldo1_dcdc34_ops, 64, 285 TPS65218_REG_CONTROL_LDO1, 286 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 287 TPS65218_ENABLE2_LDO1_EN, 0, 0, ldo1_dcdc3_ranges, 288 2, 0, 0), 289 TPS65218_REGULATOR("LS3", TPS65218_LS_3, REGULATOR_CURRENT, 290 tps65218_ls3_ops, 0, 0, 0, TPS65218_REG_ENABLE2, 291 TPS65218_ENABLE2_LS3_EN, TPS65218_REG_CONFIG2, 292 TPS65218_CONFIG2_LS3ILIM_MASK, NULL, 0, 0, 0), 293 }; 294 295 static int tps65218_regulator_probe(struct platform_device *pdev) 296 { 297 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 298 struct regulator_init_data *init_data; 299 const struct tps_info *template; 300 struct regulator_dev *rdev; 301 const struct of_device_id *match; 302 struct regulator_config config = { }; 303 int id; 304 305 match = of_match_device(tps65218_of_match, &pdev->dev); 306 if (!match) 307 return -ENODEV; 308 309 template = match->data; 310 id = template->id; 311 init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node, 312 ®ulators[id]); 313 314 platform_set_drvdata(pdev, tps); 315 316 tps->info[id] = &tps65218_pmic_regs[id]; 317 config.dev = &pdev->dev; 318 config.init_data = init_data; 319 config.driver_data = tps; 320 config.regmap = tps->regmap; 321 config.of_node = pdev->dev.of_node; 322 323 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); 324 if (IS_ERR(rdev)) { 325 dev_err(tps->dev, "failed to register %s regulator\n", 326 pdev->name); 327 return PTR_ERR(rdev); 328 } 329 330 return 0; 331 } 332 333 static struct platform_driver tps65218_regulator_driver = { 334 .driver = { 335 .name = "tps65218-pmic", 336 .of_match_table = tps65218_of_match, 337 }, 338 .probe = tps65218_regulator_probe, 339 }; 340 341 module_platform_driver(tps65218_regulator_driver); 342 343 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 344 MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 345 MODULE_ALIAS("platform:tps65218-pmic"); 346 MODULE_LICENSE("GPL v2"); 347