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, DCDC5, DCDC6, LDO1 }; 31 32 #define TPS65218_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _er, _em, _t, \ 33 _lr, _nlr, _delay) \ 34 { \ 35 .name = _name, \ 36 .id = _id, \ 37 .ops = &_ops, \ 38 .n_voltages = _n, \ 39 .type = REGULATOR_VOLTAGE, \ 40 .owner = THIS_MODULE, \ 41 .vsel_reg = _vr, \ 42 .vsel_mask = _vm, \ 43 .enable_reg = _er, \ 44 .enable_mask = _em, \ 45 .volt_table = _t, \ 46 .linear_ranges = _lr, \ 47 .n_linear_ranges = _nlr, \ 48 .ramp_delay = _delay, \ 49 } \ 50 51 #define TPS65218_INFO(_id, _nm, _min, _max) \ 52 { \ 53 .id = _id, \ 54 .name = _nm, \ 55 .min_uV = _min, \ 56 .max_uV = _max, \ 57 } 58 59 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { 60 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 61 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 62 }; 63 64 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { 65 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 66 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 67 }; 68 69 static const struct regulator_linear_range dcdc4_ranges[] = { 70 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 71 REGULATOR_LINEAR_RANGE(1550000, 0x10, 0x34, 50000), 72 }; 73 74 static struct tps_info tps65218_pmic_regs[] = { 75 TPS65218_INFO(0, "DCDC1", 850000, 167500), 76 TPS65218_INFO(1, "DCDC2", 850000, 1675000), 77 TPS65218_INFO(2, "DCDC3", 900000, 3400000), 78 TPS65218_INFO(3, "DCDC4", 1175000, 3400000), 79 TPS65218_INFO(4, "DCDC5", 1000000, 1000000), 80 TPS65218_INFO(5, "DCDC6", 1800000, 1800000), 81 TPS65218_INFO(6, "LDO1", 900000, 3400000), 82 }; 83 84 #define TPS65218_OF_MATCH(comp, label) \ 85 { \ 86 .compatible = comp, \ 87 .data = &label, \ 88 } 89 90 static const struct of_device_id tps65218_of_match[] = { 91 TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]), 92 TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]), 93 TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]), 94 TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]), 95 TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]), 96 TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]), 97 TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]), 98 { } 99 }; 100 MODULE_DEVICE_TABLE(of, tps65218_of_match); 101 102 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, 103 unsigned selector) 104 { 105 int ret; 106 struct tps65218 *tps = rdev_get_drvdata(dev); 107 unsigned int rid = rdev_get_id(dev); 108 109 /* Set the voltage based on vsel value and write protect level is 2 */ 110 ret = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 111 selector, TPS65218_PROTECT_L1); 112 113 /* Set GO bit for DCDC1/2 to initiate voltage transistion */ 114 switch (rid) { 115 case TPS65218_DCDC_1: 116 case TPS65218_DCDC_2: 117 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, 118 TPS65218_SLEW_RATE_GO, 119 TPS65218_SLEW_RATE_GO, 120 TPS65218_PROTECT_L1); 121 break; 122 } 123 124 return ret; 125 } 126 127 static int tps65218_pmic_enable(struct regulator_dev *dev) 128 { 129 struct tps65218 *tps = rdev_get_drvdata(dev); 130 unsigned int rid = rdev_get_id(dev); 131 132 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 133 return -EINVAL; 134 135 /* Enable the regulator and password protection is level 1 */ 136 return tps65218_set_bits(tps, dev->desc->enable_reg, 137 dev->desc->enable_mask, dev->desc->enable_mask, 138 TPS65218_PROTECT_L1); 139 } 140 141 static int tps65218_pmic_disable(struct regulator_dev *dev) 142 { 143 struct tps65218 *tps = rdev_get_drvdata(dev); 144 unsigned int rid = rdev_get_id(dev); 145 146 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 147 return -EINVAL; 148 149 /* Disable the regulator and password protection is level 1 */ 150 return tps65218_clear_bits(tps, dev->desc->enable_reg, 151 dev->desc->enable_mask, TPS65218_PROTECT_L1); 152 } 153 154 /* Operations permitted on DCDC1, DCDC2 */ 155 static struct regulator_ops tps65218_dcdc12_ops = { 156 .is_enabled = regulator_is_enabled_regmap, 157 .enable = tps65218_pmic_enable, 158 .disable = tps65218_pmic_disable, 159 .get_voltage_sel = regulator_get_voltage_sel_regmap, 160 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 161 .list_voltage = regulator_list_voltage_linear_range, 162 .map_voltage = regulator_map_voltage_linear_range, 163 .set_voltage_time_sel = regulator_set_voltage_time_sel, 164 }; 165 166 /* Operations permitted on DCDC3, DCDC4 and LDO1 */ 167 static struct regulator_ops tps65218_ldo1_dcdc34_ops = { 168 .is_enabled = regulator_is_enabled_regmap, 169 .enable = tps65218_pmic_enable, 170 .disable = tps65218_pmic_disable, 171 .get_voltage_sel = regulator_get_voltage_sel_regmap, 172 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 173 .list_voltage = regulator_list_voltage_linear_range, 174 .map_voltage = regulator_map_voltage_linear_range, 175 }; 176 177 /* Operations permitted on DCDC5, DCDC6 */ 178 static struct regulator_ops tps65218_dcdc56_pmic_ops = { 179 .is_enabled = regulator_is_enabled_regmap, 180 .enable = tps65218_pmic_enable, 181 .disable = tps65218_pmic_disable, 182 }; 183 184 static const struct regulator_desc regulators[] = { 185 TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64, 186 TPS65218_REG_CONTROL_DCDC1, 187 TPS65218_CONTROL_DCDC1_MASK, 188 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, NULL, 189 dcdc1_dcdc2_ranges, 2, 4000), 190 TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64, 191 TPS65218_REG_CONTROL_DCDC2, 192 TPS65218_CONTROL_DCDC2_MASK, 193 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, NULL, 194 dcdc1_dcdc2_ranges, 2, 4000), 195 TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops, 196 64, TPS65218_REG_CONTROL_DCDC3, 197 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 198 TPS65218_ENABLE1_DC3_EN, NULL, 199 ldo1_dcdc3_ranges, 2, 0), 200 TPS65218_REGULATOR("DCDC4", TPS65218_DCDC_4, tps65218_ldo1_dcdc34_ops, 201 53, TPS65218_REG_CONTROL_DCDC4, 202 TPS65218_CONTROL_DCDC4_MASK, 203 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC4_EN, NULL, 204 dcdc4_ranges, 2, 0), 205 TPS65218_REGULATOR("DCDC5", TPS65218_DCDC_5, tps65218_dcdc56_pmic_ops, 206 1, -1, -1, TPS65218_REG_ENABLE1, 207 TPS65218_ENABLE1_DC5_EN, NULL, NULL, 0, 0), 208 TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops, 209 1, -1, -1, TPS65218_REG_ENABLE1, 210 TPS65218_ENABLE1_DC6_EN, NULL, NULL, 0, 0), 211 TPS65218_REGULATOR("LDO1", TPS65218_LDO_1, tps65218_ldo1_dcdc34_ops, 64, 212 TPS65218_REG_CONTROL_LDO1, 213 TPS65218_CONTROL_LDO1_MASK, TPS65218_REG_ENABLE2, 214 TPS65218_ENABLE2_LDO1_EN, NULL, ldo1_dcdc3_ranges, 215 2, 0), 216 }; 217 218 static int tps65218_regulator_probe(struct platform_device *pdev) 219 { 220 struct tps65218 *tps = dev_get_drvdata(pdev->dev.parent); 221 struct regulator_init_data *init_data; 222 const struct tps_info *template; 223 struct regulator_dev *rdev; 224 const struct of_device_id *match; 225 struct regulator_config config = { }; 226 int id; 227 228 match = of_match_device(tps65218_of_match, &pdev->dev); 229 if (!match) 230 return -ENODEV; 231 232 template = match->data; 233 id = template->id; 234 init_data = of_get_regulator_init_data(&pdev->dev, pdev->dev.of_node); 235 236 platform_set_drvdata(pdev, tps); 237 238 tps->info[id] = &tps65218_pmic_regs[id]; 239 config.dev = &pdev->dev; 240 config.init_data = init_data; 241 config.driver_data = tps; 242 config.regmap = tps->regmap; 243 config.of_node = pdev->dev.of_node; 244 245 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); 246 if (IS_ERR(rdev)) { 247 dev_err(tps->dev, "failed to register %s regulator\n", 248 pdev->name); 249 return PTR_ERR(rdev); 250 } 251 252 return 0; 253 } 254 255 static struct platform_driver tps65218_regulator_driver = { 256 .driver = { 257 .name = "tps65218-pmic", 258 .owner = THIS_MODULE, 259 .of_match_table = tps65218_of_match, 260 }, 261 .probe = tps65218_regulator_probe, 262 }; 263 264 module_platform_driver(tps65218_regulator_driver); 265 266 MODULE_AUTHOR("J Keerthy <j-keerthy@ti.com>"); 267 MODULE_DESCRIPTION("TPS65218 voltage regulator driver"); 268 MODULE_ALIAS("platform:tps65218-pmic"); 269 MODULE_LICENSE("GPL v2"); 270