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/of_regulator.h> 26 #include <linux/regulator/driver.h> 27 #include <linux/regulator/machine.h> 28 #include <linux/mfd/tps65217.h> 29 30 #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t, _lr, _nlr) \ 31 { \ 32 .name = _name, \ 33 .id = _id, \ 34 .ops = &_ops, \ 35 .n_voltages = _n, \ 36 .type = REGULATOR_VOLTAGE, \ 37 .owner = THIS_MODULE, \ 38 .vsel_reg = _vr, \ 39 .vsel_mask = _vm, \ 40 .enable_reg = TPS65217_REG_ENABLE, \ 41 .enable_mask = _em, \ 42 .volt_table = _t, \ 43 .linear_ranges = _lr, \ 44 .n_linear_ranges = _nlr, \ 45 } \ 46 47 static const unsigned int LDO1_VSEL_table[] = { 48 1000000, 1100000, 1200000, 1250000, 49 1300000, 1350000, 1400000, 1500000, 50 1600000, 1800000, 2500000, 2750000, 51 2800000, 3000000, 3100000, 3300000, 52 }; 53 54 static const struct regulator_linear_range tps65217_uv1_ranges[] = { 55 { .min_uV = 900000, .max_uV = 1500000, .min_sel = 0, .max_sel = 24, 56 .uV_step = 25000 }, 57 { .min_uV = 1550000, .max_uV = 1800000, .min_sel = 25, .max_sel = 30, 58 .uV_step = 50000 }, 59 { .min_uV = 1850000, .max_uV = 2900000, .min_sel = 31, .max_sel = 52, 60 .uV_step = 50000 }, 61 { .min_uV = 3000000, .max_uV = 3200000, .min_sel = 53, .max_sel = 55, 62 .uV_step = 100000 }, 63 { .min_uV = 3300000, .max_uV = 3300000, .min_sel = 56, .max_sel = 62, 64 .uV_step = 0 }, 65 }; 66 67 static const struct regulator_linear_range tps65217_uv2_ranges[] = { 68 { .min_uV = 1500000, .max_uV = 1900000, .min_sel = 0, .max_sel = 8, 69 .uV_step = 50000 }, 70 { .min_uV = 2000000, .max_uV = 2400000, .min_sel = 9, .max_sel = 13, 71 .uV_step = 100000 }, 72 { .min_uV = 2450000, .max_uV = 3300000, .min_sel = 14, .max_sel = 31, 73 .uV_step = 50000 }, 74 }; 75 76 static int tps65217_pmic_enable(struct regulator_dev *dev) 77 { 78 struct tps65217 *tps = rdev_get_drvdata(dev); 79 unsigned int rid = rdev_get_id(dev); 80 81 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 82 return -EINVAL; 83 84 /* Enable the regulator and password protection is level 1 */ 85 return tps65217_set_bits(tps, TPS65217_REG_ENABLE, 86 dev->desc->enable_mask, dev->desc->enable_mask, 87 TPS65217_PROTECT_L1); 88 } 89 90 static int tps65217_pmic_disable(struct regulator_dev *dev) 91 { 92 struct tps65217 *tps = rdev_get_drvdata(dev); 93 unsigned int rid = rdev_get_id(dev); 94 95 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 96 return -EINVAL; 97 98 /* Disable the regulator and password protection is level 1 */ 99 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, 100 dev->desc->enable_mask, TPS65217_PROTECT_L1); 101 } 102 103 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, 104 unsigned selector) 105 { 106 int ret; 107 struct tps65217 *tps = rdev_get_drvdata(dev); 108 unsigned int rid = rdev_get_id(dev); 109 110 /* Set the voltage based on vsel value and write protect level is 2 */ 111 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 112 selector, TPS65217_PROTECT_L2); 113 114 /* Set GO bit for DCDCx to initiate voltage transistion */ 115 switch (rid) { 116 case TPS65217_DCDC_1 ... TPS65217_DCDC_3: 117 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, 118 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, 119 TPS65217_PROTECT_L2); 120 break; 121 } 122 123 return ret; 124 } 125 126 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ 127 static struct regulator_ops tps65217_pmic_ops = { 128 .is_enabled = regulator_is_enabled_regmap, 129 .enable = tps65217_pmic_enable, 130 .disable = tps65217_pmic_disable, 131 .get_voltage_sel = regulator_get_voltage_sel_regmap, 132 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 133 .list_voltage = regulator_list_voltage_linear_range, 134 .map_voltage = regulator_map_voltage_linear_range, 135 }; 136 137 /* Operations permitted on LDO1 */ 138 static struct regulator_ops tps65217_pmic_ldo1_ops = { 139 .is_enabled = regulator_is_enabled_regmap, 140 .enable = tps65217_pmic_enable, 141 .disable = tps65217_pmic_disable, 142 .get_voltage_sel = regulator_get_voltage_sel_regmap, 143 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 144 .list_voltage = regulator_list_voltage_table, 145 }; 146 147 static const struct regulator_desc regulators[] = { 148 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, 149 TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, 150 TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges, 151 2), /* DCDC1 voltage range: 900000 ~ 1800000 */ 152 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, 153 TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, 154 TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges, 155 ARRAY_SIZE(tps65217_uv1_ranges)), 156 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, 157 TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, 158 TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges, 159 1), /* DCDC3 voltage range: 900000 ~ 1500000 */ 160 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, 161 TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, 162 TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0), 163 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, 164 TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, 165 TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges, 166 ARRAY_SIZE(tps65217_uv1_ranges)), 167 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, 168 TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, 169 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, 170 NULL, tps65217_uv2_ranges, 171 ARRAY_SIZE(tps65217_uv2_ranges)), 172 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, 173 TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, 174 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, 175 NULL, tps65217_uv2_ranges, 176 ARRAY_SIZE(tps65217_uv2_ranges)), 177 }; 178 179 #ifdef CONFIG_OF 180 static struct of_regulator_match reg_matches[] = { 181 { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 }, 182 { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 }, 183 { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 }, 184 { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 }, 185 { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 }, 186 { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 }, 187 { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 }, 188 }; 189 190 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) 191 { 192 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); 193 struct device_node *node = tps->dev->of_node; 194 struct tps65217_board *pdata; 195 struct device_node *regs; 196 int i, count; 197 198 regs = of_find_node_by_name(node, "regulators"); 199 if (!regs) 200 return NULL; 201 202 count = of_regulator_match(&pdev->dev, regs, reg_matches, 203 TPS65217_NUM_REGULATOR); 204 of_node_put(regs); 205 if ((count < 0) || (count > TPS65217_NUM_REGULATOR)) 206 return NULL; 207 208 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 209 if (!pdata) 210 return NULL; 211 212 for (i = 0; i < count; i++) { 213 if (!reg_matches[i].init_data || !reg_matches[i].of_node) 214 continue; 215 216 pdata->tps65217_init_data[i] = reg_matches[i].init_data; 217 pdata->of_node[i] = reg_matches[i].of_node; 218 } 219 220 return pdata; 221 } 222 #else 223 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) 224 { 225 return NULL; 226 } 227 #endif 228 229 static int tps65217_regulator_probe(struct platform_device *pdev) 230 { 231 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); 232 struct tps65217_board *pdata = dev_get_platdata(tps->dev); 233 struct regulator_init_data *reg_data; 234 struct regulator_dev *rdev; 235 struct regulator_config config = { }; 236 int i, ret; 237 238 if (tps->dev->of_node) 239 pdata = tps65217_parse_dt(pdev); 240 241 if (!pdata) { 242 dev_err(&pdev->dev, "Platform data not found\n"); 243 return -EINVAL; 244 } 245 246 if (tps65217_chip_id(tps) != TPS65217) { 247 dev_err(&pdev->dev, "Invalid tps chip version\n"); 248 return -ENODEV; 249 } 250 251 platform_set_drvdata(pdev, tps); 252 253 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { 254 255 reg_data = pdata->tps65217_init_data[i]; 256 257 /* 258 * Regulator API handles empty constraints but not NULL 259 * constraints 260 */ 261 if (!reg_data) 262 continue; 263 264 /* Register the regulators */ 265 config.dev = tps->dev; 266 config.init_data = reg_data; 267 config.driver_data = tps; 268 config.regmap = tps->regmap; 269 if (tps->dev->of_node) 270 config.of_node = pdata->of_node[i]; 271 272 rdev = regulator_register(®ulators[i], &config); 273 if (IS_ERR(rdev)) { 274 dev_err(tps->dev, "failed to register %s regulator\n", 275 pdev->name); 276 ret = PTR_ERR(rdev); 277 goto err_unregister_regulator; 278 } 279 280 /* Save regulator for cleanup */ 281 tps->rdev[i] = rdev; 282 } 283 return 0; 284 285 err_unregister_regulator: 286 while (--i >= 0) 287 regulator_unregister(tps->rdev[i]); 288 289 return ret; 290 } 291 292 static int tps65217_regulator_remove(struct platform_device *pdev) 293 { 294 struct tps65217 *tps = platform_get_drvdata(pdev); 295 unsigned int i; 296 297 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) 298 regulator_unregister(tps->rdev[i]); 299 300 return 0; 301 } 302 303 static struct platform_driver tps65217_regulator_driver = { 304 .driver = { 305 .name = "tps65217-pmic", 306 }, 307 .probe = tps65217_regulator_probe, 308 .remove = tps65217_regulator_remove, 309 }; 310 311 static int __init tps65217_regulator_init(void) 312 { 313 return platform_driver_register(&tps65217_regulator_driver); 314 } 315 subsys_initcall(tps65217_regulator_init); 316 317 static void __exit tps65217_regulator_exit(void) 318 { 319 platform_driver_unregister(&tps65217_regulator_driver); 320 } 321 module_exit(tps65217_regulator_exit); 322 323 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); 324 MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); 325 MODULE_ALIAS("platform:tps65217-pmic"); 326 MODULE_LICENSE("GPL v2"); 327