1 /* 2 * tps65217-regulator.c 3 * 4 * Regulator driver for TPS65217 PMIC 5 * 6 * Copyright (C) 2011 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 as 10 * published by the Free Software Foundation version 2. 11 * 12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 13 * kind, whether express or implied; without even the implied warranty 14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 * GNU General Public License 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 25 #include <linux/regulator/driver.h> 26 #include <linux/regulator/machine.h> 27 #include <linux/mfd/tps65217.h> 28 29 #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \ 30 { \ 31 .name = _name, \ 32 .id = _id, \ 33 .ops = &_ops, \ 34 .n_voltages = _n, \ 35 .type = REGULATOR_VOLTAGE, \ 36 .owner = THIS_MODULE, \ 37 .vsel_reg = _vr, \ 38 .vsel_mask = _vm, \ 39 .enable_reg = TPS65217_REG_ENABLE, \ 40 .enable_mask = _em, \ 41 .volt_table = _t, \ 42 } \ 43 44 #define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \ 45 { \ 46 .name = _nm, \ 47 .min_uV = _min, \ 48 .max_uV = _max, \ 49 .vsel_to_uv = _f1, \ 50 .uv_to_vsel = _f2, \ 51 } 52 53 static const unsigned int LDO1_VSEL_table[] = { 54 1000000, 1100000, 1200000, 1250000, 55 1300000, 1350000, 1400000, 1500000, 56 1600000, 1800000, 2500000, 2750000, 57 2800000, 3000000, 3100000, 3300000, 58 }; 59 60 static int tps65217_vsel_to_uv1(unsigned int vsel) 61 { 62 int uV = 0; 63 64 if (vsel > 63) 65 return -EINVAL; 66 67 if (vsel <= 24) 68 uV = vsel * 25000 + 900000; 69 else if (vsel <= 52) 70 uV = (vsel - 24) * 50000 + 1500000; 71 else if (vsel < 56) 72 uV = (vsel - 52) * 100000 + 2900000; 73 else 74 uV = 3300000; 75 76 return uV; 77 } 78 79 static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel) 80 { 81 if (uV < 0 || uV > 3300000) 82 return -EINVAL; 83 84 if (uV <= 1500000) 85 *vsel = DIV_ROUND_UP(uV - 900000, 25000); 86 else if (uV <= 2900000) 87 *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000); 88 else if (uV < 3300000) 89 *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000); 90 else 91 *vsel = 56; 92 93 return 0; 94 } 95 96 static int tps65217_vsel_to_uv2(unsigned int vsel) 97 { 98 int uV = 0; 99 100 if (vsel > 31) 101 return -EINVAL; 102 103 if (vsel <= 8) 104 uV = vsel * 50000 + 1500000; 105 else if (vsel <= 13) 106 uV = (vsel - 8) * 100000 + 1900000; 107 else 108 uV = (vsel - 13) * 50000 + 2400000; 109 110 return uV; 111 } 112 113 static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel) 114 { 115 if (uV < 0 || uV > 3300000) 116 return -EINVAL; 117 118 if (uV <= 1900000) 119 *vsel = DIV_ROUND_UP(uV - 1500000, 50000); 120 else if (uV <= 2400000) 121 *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000); 122 else 123 *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000); 124 125 return 0; 126 } 127 128 static struct tps_info tps65217_pmic_regs[] = { 129 TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1, 130 tps65217_uv_to_vsel1), 131 TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1, 132 tps65217_uv_to_vsel1), 133 TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1, 134 tps65217_uv_to_vsel1), 135 TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL), 136 TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1, 137 tps65217_uv_to_vsel1), 138 TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2, 139 tps65217_uv_to_vsel2), 140 TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2, 141 tps65217_uv_to_vsel2), 142 }; 143 144 static int tps65217_pmic_enable(struct regulator_dev *dev) 145 { 146 struct tps65217 *tps = rdev_get_drvdata(dev); 147 unsigned int rid = rdev_get_id(dev); 148 149 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 150 return -EINVAL; 151 152 /* Enable the regulator and password protection is level 1 */ 153 return tps65217_set_bits(tps, TPS65217_REG_ENABLE, 154 dev->desc->enable_mask, dev->desc->enable_mask, 155 TPS65217_PROTECT_L1); 156 } 157 158 static int tps65217_pmic_disable(struct regulator_dev *dev) 159 { 160 struct tps65217 *tps = rdev_get_drvdata(dev); 161 unsigned int rid = rdev_get_id(dev); 162 163 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 164 return -EINVAL; 165 166 /* Disable the regulator and password protection is level 1 */ 167 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, 168 dev->desc->enable_mask, TPS65217_PROTECT_L1); 169 } 170 171 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, 172 unsigned selector) 173 { 174 int ret; 175 struct tps65217 *tps = rdev_get_drvdata(dev); 176 unsigned int rid = rdev_get_id(dev); 177 178 /* Set the voltage based on vsel value and write protect level is 2 */ 179 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 180 selector, TPS65217_PROTECT_L2); 181 182 /* Set GO bit for DCDCx to initiate voltage transistion */ 183 switch (rid) { 184 case TPS65217_DCDC_1 ... TPS65217_DCDC_3: 185 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, 186 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, 187 TPS65217_PROTECT_L2); 188 break; 189 } 190 191 return ret; 192 } 193 194 static int tps65217_pmic_map_voltage(struct regulator_dev *dev, 195 int min_uV, int max_uV) 196 { 197 198 struct tps65217 *tps = rdev_get_drvdata(dev); 199 unsigned int sel, rid = rdev_get_id(dev); 200 int ret; 201 202 /* LDO1 uses regulator_map_voltage_iterate() */ 203 if (rid == TPS65217_LDO_1) 204 return -EINVAL; 205 206 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 207 return -EINVAL; 208 209 if (min_uV < tps->info[rid]->min_uV) 210 min_uV = tps->info[rid]->min_uV; 211 212 if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV) 213 return -EINVAL; 214 215 ret = tps->info[rid]->uv_to_vsel(min_uV, &sel); 216 if (ret) 217 return ret; 218 219 return sel; 220 } 221 222 static int tps65217_pmic_list_voltage(struct regulator_dev *dev, 223 unsigned selector) 224 { 225 struct tps65217 *tps = rdev_get_drvdata(dev); 226 unsigned int rid = rdev_get_id(dev); 227 228 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 229 return -EINVAL; 230 231 if (selector >= dev->desc->n_voltages) 232 return -EINVAL; 233 234 return tps->info[rid]->vsel_to_uv(selector); 235 } 236 237 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ 238 static struct regulator_ops tps65217_pmic_ops = { 239 .is_enabled = regulator_is_enabled_regmap, 240 .enable = tps65217_pmic_enable, 241 .disable = tps65217_pmic_disable, 242 .get_voltage_sel = regulator_get_voltage_sel_regmap, 243 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 244 .list_voltage = tps65217_pmic_list_voltage, 245 .map_voltage = tps65217_pmic_map_voltage, 246 }; 247 248 /* Operations permitted on LDO1 */ 249 static struct regulator_ops tps65217_pmic_ldo1_ops = { 250 .is_enabled = regulator_is_enabled_regmap, 251 .enable = tps65217_pmic_enable, 252 .disable = tps65217_pmic_disable, 253 .get_voltage_sel = regulator_get_voltage_sel_regmap, 254 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 255 .list_voltage = regulator_list_voltage_table, 256 }; 257 258 static const struct regulator_desc regulators[] = { 259 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, 260 TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, 261 TPS65217_ENABLE_DC1_EN, NULL), 262 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, 263 TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, 264 TPS65217_ENABLE_DC2_EN, NULL), 265 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, 266 TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, 267 TPS65217_ENABLE_DC3_EN, NULL), 268 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, 269 TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, 270 TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table), 271 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, 272 TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, 273 TPS65217_ENABLE_LDO2_EN, NULL), 274 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, 275 TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, 276 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, 277 NULL), 278 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, 279 TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, 280 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, 281 NULL), 282 }; 283 284 static int __devinit tps65217_regulator_probe(struct platform_device *pdev) 285 { 286 struct regulator_dev *rdev; 287 struct tps65217 *tps; 288 struct tps_info *info = &tps65217_pmic_regs[pdev->id]; 289 struct regulator_config config = { }; 290 291 /* Already set by core driver */ 292 tps = dev_to_tps65217(pdev->dev.parent); 293 tps->info[pdev->id] = info; 294 295 config.dev = &pdev->dev; 296 config.of_node = pdev->dev.of_node; 297 config.init_data = pdev->dev.platform_data; 298 config.driver_data = tps; 299 300 rdev = regulator_register(®ulators[pdev->id], &config); 301 if (IS_ERR(rdev)) 302 return PTR_ERR(rdev); 303 304 platform_set_drvdata(pdev, rdev); 305 306 return 0; 307 } 308 309 static int __devexit tps65217_regulator_remove(struct platform_device *pdev) 310 { 311 struct regulator_dev *rdev = platform_get_drvdata(pdev); 312 313 platform_set_drvdata(pdev, NULL); 314 regulator_unregister(rdev); 315 316 return 0; 317 } 318 319 static struct platform_driver tps65217_regulator_driver = { 320 .driver = { 321 .name = "tps65217-pmic", 322 }, 323 .probe = tps65217_regulator_probe, 324 .remove = __devexit_p(tps65217_regulator_remove), 325 }; 326 327 static int __init tps65217_regulator_init(void) 328 { 329 return platform_driver_register(&tps65217_regulator_driver); 330 } 331 subsys_initcall(tps65217_regulator_init); 332 333 static void __exit tps65217_regulator_exit(void) 334 { 335 platform_driver_unregister(&tps65217_regulator_driver); 336 } 337 module_exit(tps65217_regulator_exit); 338 339 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); 340 MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); 341 MODULE_ALIAS("platform:tps65217-pmic"); 342 MODULE_LICENSE("GPL v2"); 343