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, \ 33 _lr, _nlr, _delay, _fuv) \ 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 = NULL, \ 46 .linear_ranges = _lr, \ 47 .n_linear_ranges = _nlr, \ 48 .ramp_delay = _delay, \ 49 .fixed_uV = _fuv \ 50 } \ 51 52 #define TPS65218_INFO(_id, _nm, _min, _max) \ 53 [_id] = { \ 54 .id = _id, \ 55 .name = _nm, \ 56 .min_uV = _min, \ 57 .max_uV = _max, \ 58 } 59 60 static const struct regulator_linear_range dcdc1_dcdc2_ranges[] = { 61 REGULATOR_LINEAR_RANGE(850000, 0x0, 0x32, 10000), 62 REGULATOR_LINEAR_RANGE(1375000, 0x33, 0x3f, 25000), 63 }; 64 65 static const struct regulator_linear_range ldo1_dcdc3_ranges[] = { 66 REGULATOR_LINEAR_RANGE(900000, 0x0, 0x1a, 25000), 67 REGULATOR_LINEAR_RANGE(1600000, 0x1b, 0x3f, 50000), 68 }; 69 70 static const struct regulator_linear_range dcdc4_ranges[] = { 71 REGULATOR_LINEAR_RANGE(1175000, 0x0, 0xf, 25000), 72 REGULATOR_LINEAR_RANGE(1600000, 0x10, 0x34, 50000), 73 }; 74 75 static struct tps_info tps65218_pmic_regs[] = { 76 TPS65218_INFO(DCDC1, "DCDC1", 850000, 1675000), 77 TPS65218_INFO(DCDC2, "DCDC2", 850000, 1675000), 78 TPS65218_INFO(DCDC3, "DCDC3", 900000, 3400000), 79 TPS65218_INFO(DCDC4, "DCDC4", 1175000, 3400000), 80 TPS65218_INFO(DCDC5, "DCDC5", 1000000, 1000000), 81 TPS65218_INFO(DCDC6, "DCDC6", 1800000, 1800000), 82 TPS65218_INFO(LDO1, "LDO1", 900000, 3400000), 83 }; 84 85 #define TPS65218_OF_MATCH(comp, label) \ 86 { \ 87 .compatible = comp, \ 88 .data = &label, \ 89 } 90 91 static const struct of_device_id tps65218_of_match[] = { 92 TPS65218_OF_MATCH("ti,tps65218-dcdc1", tps65218_pmic_regs[DCDC1]), 93 TPS65218_OF_MATCH("ti,tps65218-dcdc2", tps65218_pmic_regs[DCDC2]), 94 TPS65218_OF_MATCH("ti,tps65218-dcdc3", tps65218_pmic_regs[DCDC3]), 95 TPS65218_OF_MATCH("ti,tps65218-dcdc4", tps65218_pmic_regs[DCDC4]), 96 TPS65218_OF_MATCH("ti,tps65218-dcdc5", tps65218_pmic_regs[DCDC5]), 97 TPS65218_OF_MATCH("ti,tps65218-dcdc6", tps65218_pmic_regs[DCDC6]), 98 TPS65218_OF_MATCH("ti,tps65218-ldo1", tps65218_pmic_regs[LDO1]), 99 { } 100 }; 101 MODULE_DEVICE_TABLE(of, tps65218_of_match); 102 103 static int tps65218_pmic_set_voltage_sel(struct regulator_dev *dev, 104 unsigned selector) 105 { 106 int ret; 107 struct tps65218 *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 = tps65218_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 112 selector, TPS65218_PROTECT_L1); 113 114 /* Set GO bit for DCDC1/2 to initiate voltage transistion */ 115 switch (rid) { 116 case TPS65218_DCDC_1: 117 case TPS65218_DCDC_2: 118 ret = tps65218_set_bits(tps, TPS65218_REG_CONTRL_SLEW_RATE, 119 TPS65218_SLEW_RATE_GO, 120 TPS65218_SLEW_RATE_GO, 121 TPS65218_PROTECT_L1); 122 break; 123 } 124 125 return ret; 126 } 127 128 static int tps65218_pmic_enable(struct regulator_dev *dev) 129 { 130 struct tps65218 *tps = rdev_get_drvdata(dev); 131 int rid = rdev_get_id(dev); 132 133 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 134 return -EINVAL; 135 136 /* Enable the regulator and password protection is level 1 */ 137 return tps65218_set_bits(tps, dev->desc->enable_reg, 138 dev->desc->enable_mask, dev->desc->enable_mask, 139 TPS65218_PROTECT_L1); 140 } 141 142 static int tps65218_pmic_disable(struct regulator_dev *dev) 143 { 144 struct tps65218 *tps = rdev_get_drvdata(dev); 145 int rid = rdev_get_id(dev); 146 147 if (rid < TPS65218_DCDC_1 || rid > TPS65218_LDO_1) 148 return -EINVAL; 149 150 /* Disable the regulator and password protection is level 1 */ 151 return tps65218_clear_bits(tps, dev->desc->enable_reg, 152 dev->desc->enable_mask, TPS65218_PROTECT_L1); 153 } 154 155 /* Operations permitted on DCDC1, DCDC2 */ 156 static struct regulator_ops tps65218_dcdc12_ops = { 157 .is_enabled = regulator_is_enabled_regmap, 158 .enable = tps65218_pmic_enable, 159 .disable = tps65218_pmic_disable, 160 .get_voltage_sel = regulator_get_voltage_sel_regmap, 161 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 162 .list_voltage = regulator_list_voltage_linear_range, 163 .map_voltage = regulator_map_voltage_linear_range, 164 .set_voltage_time_sel = regulator_set_voltage_time_sel, 165 }; 166 167 /* Operations permitted on DCDC3, DCDC4 and LDO1 */ 168 static struct regulator_ops tps65218_ldo1_dcdc34_ops = { 169 .is_enabled = regulator_is_enabled_regmap, 170 .enable = tps65218_pmic_enable, 171 .disable = tps65218_pmic_disable, 172 .get_voltage_sel = regulator_get_voltage_sel_regmap, 173 .set_voltage_sel = tps65218_pmic_set_voltage_sel, 174 .list_voltage = regulator_list_voltage_linear_range, 175 .map_voltage = regulator_map_voltage_linear_range, 176 }; 177 178 /* Operations permitted on DCDC5, DCDC6 */ 179 static struct regulator_ops tps65218_dcdc56_pmic_ops = { 180 .is_enabled = regulator_is_enabled_regmap, 181 .enable = tps65218_pmic_enable, 182 .disable = tps65218_pmic_disable, 183 }; 184 185 static const struct regulator_desc regulators[] = { 186 TPS65218_REGULATOR("DCDC1", TPS65218_DCDC_1, tps65218_dcdc12_ops, 64, 187 TPS65218_REG_CONTROL_DCDC1, 188 TPS65218_CONTROL_DCDC1_MASK, 189 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC1_EN, 190 dcdc1_dcdc2_ranges, 2, 4000, 0), 191 TPS65218_REGULATOR("DCDC2", TPS65218_DCDC_2, tps65218_dcdc12_ops, 64, 192 TPS65218_REG_CONTROL_DCDC2, 193 TPS65218_CONTROL_DCDC2_MASK, 194 TPS65218_REG_ENABLE1, TPS65218_ENABLE1_DC2_EN, 195 dcdc1_dcdc2_ranges, 2, 4000, 0), 196 TPS65218_REGULATOR("DCDC3", TPS65218_DCDC_3, tps65218_ldo1_dcdc34_ops, 197 64, TPS65218_REG_CONTROL_DCDC3, 198 TPS65218_CONTROL_DCDC3_MASK, TPS65218_REG_ENABLE1, 199 TPS65218_ENABLE1_DC3_EN, ldo1_dcdc3_ranges, 2, 0, 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, 204 dcdc4_ranges, 2, 0, 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, 0, 0, 1000000), 208 TPS65218_REGULATOR("DCDC6", TPS65218_DCDC_6, tps65218_dcdc56_pmic_ops, 209 1, -1, -1, TPS65218_REG_ENABLE1, 210 TPS65218_ENABLE1_DC6_EN, NULL, 0, 0, 1800000), 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, ldo1_dcdc3_ranges, 215 2, 0, 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 ®ulators[id]); 236 237 platform_set_drvdata(pdev, tps); 238 239 tps->info[id] = &tps65218_pmic_regs[id]; 240 config.dev = &pdev->dev; 241 config.init_data = init_data; 242 config.driver_data = tps; 243 config.regmap = tps->regmap; 244 config.of_node = pdev->dev.of_node; 245 246 rdev = devm_regulator_register(&pdev->dev, ®ulators[id], &config); 247 if (IS_ERR(rdev)) { 248 dev_err(tps->dev, "failed to register %s regulator\n", 249 pdev->name); 250 return PTR_ERR(rdev); 251 } 252 253 return 0; 254 } 255 256 static struct platform_driver tps65218_regulator_driver = { 257 .driver = { 258 .name = "tps65218-pmic", 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