1 /* 2 * Copyright (C) 2015 Texas Instruments Incorporated - http://www.ti.com/ 3 * 4 * Author: Andrew F. Davis <afd@ti.com> 5 * 6 * This program is free software; you can redistribute it and/or 7 * modify it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 * 10 * This program is distributed "as is" WITHOUT ANY WARRANTY of any 11 * kind, whether expressed or implied; without even the implied warranty 12 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License version 2 for more details. 14 * 15 * Based on the TPS65912 driver 16 */ 17 18 #include <linux/module.h> 19 #include <linux/of.h> 20 #include <linux/platform_device.h> 21 #include <linux/regulator/driver.h> 22 23 #include <linux/mfd/tps65086.h> 24 25 enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1, 26 LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT }; 27 28 #define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm) \ 29 [_id] = { \ 30 .desc = { \ 31 .name = _name, \ 32 .of_match = of_match_ptr(_of), \ 33 .regulators_node = "regulators", \ 34 .of_parse_cb = tps65086_of_parse_cb, \ 35 .id = _id, \ 36 .ops = ®_ops, \ 37 .n_voltages = _nv, \ 38 .type = REGULATOR_VOLTAGE, \ 39 .owner = THIS_MODULE, \ 40 .vsel_reg = _vr, \ 41 .vsel_mask = _vm, \ 42 .enable_reg = _er, \ 43 .enable_mask = _em, \ 44 .volt_table = NULL, \ 45 .linear_ranges = _lr, \ 46 .n_linear_ranges = ARRAY_SIZE(_lr), \ 47 }, \ 48 .decay_reg = _dr, \ 49 .decay_mask = _dm, \ 50 } 51 52 #define TPS65086_SWITCH(_name, _of, _id, _er, _em) \ 53 [_id] = { \ 54 .desc = { \ 55 .name = _name, \ 56 .of_match = of_match_ptr(_of), \ 57 .regulators_node = "regulators", \ 58 .of_parse_cb = tps65086_of_parse_cb, \ 59 .id = _id, \ 60 .ops = &switch_ops, \ 61 .type = REGULATOR_VOLTAGE, \ 62 .owner = THIS_MODULE, \ 63 .enable_reg = _er, \ 64 .enable_mask = _em, \ 65 }, \ 66 } 67 68 struct tps65086_regulator { 69 struct regulator_desc desc; 70 unsigned int decay_reg; 71 unsigned int decay_mask; 72 }; 73 74 static const struct regulator_linear_range tps65086_10mv_ranges[] = { 75 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), 76 REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000), 77 }; 78 79 static const struct regulator_linear_range tps65086_buck126_25mv_ranges[] = { 80 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), 81 REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0), 82 REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000), 83 }; 84 85 static const struct regulator_linear_range tps65086_buck345_25mv_ranges[] = { 86 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), 87 REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000), 88 }; 89 90 static const struct regulator_linear_range tps65086_ldoa1_ranges[] = { 91 REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0), 92 REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000), 93 REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xA, 100000), 94 REGULATOR_LINEAR_RANGE(2700000, 0xB, 0xD, 150000), 95 REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0), 96 }; 97 98 static const struct regulator_linear_range tps65086_ldoa23_ranges[] = { 99 REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000), 100 REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000), 101 }; 102 103 /* Operations permitted on regulators */ 104 static struct regulator_ops reg_ops = { 105 .enable = regulator_enable_regmap, 106 .disable = regulator_disable_regmap, 107 .is_enabled = regulator_is_enabled_regmap, 108 .set_voltage_sel = regulator_set_voltage_sel_regmap, 109 .map_voltage = regulator_map_voltage_linear_range, 110 .get_voltage_sel = regulator_get_voltage_sel_regmap, 111 .list_voltage = regulator_list_voltage_linear_range, 112 }; 113 114 /* Operations permitted on load switches */ 115 static struct regulator_ops switch_ops = { 116 .enable = regulator_enable_regmap, 117 .disable = regulator_disable_regmap, 118 .is_enabled = regulator_is_enabled_regmap, 119 }; 120 121 static int tps65086_of_parse_cb(struct device_node *dev, 122 const struct regulator_desc *desc, 123 struct regulator_config *config); 124 125 static struct tps65086_regulator regulators[] = { 126 TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL, 127 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0), 128 tps65086_10mv_ranges, TPS65086_BUCK1CTRL, 129 BIT(0)), 130 TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL, 131 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1), 132 tps65086_10mv_ranges, TPS65086_BUCK2CTRL, 133 BIT(0)), 134 TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID, 135 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2), 136 tps65086_10mv_ranges, TPS65086_BUCK3DECAY, 137 BIT(0)), 138 TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID, 139 BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0), 140 tps65086_10mv_ranges, TPS65086_BUCK4VID, 141 BIT(0)), 142 TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID, 143 BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0), 144 tps65086_10mv_ranges, TPS65086_BUCK5CTRL, 145 BIT(0)), 146 TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID, 147 BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0), 148 tps65086_10mv_ranges, TPS65086_BUCK6CTRL, 149 BIT(0)), 150 TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL, 151 VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0), 152 tps65086_ldoa1_ranges, 0, 0), 153 TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID, 154 VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0), 155 tps65086_ldoa23_ranges, 0, 0), 156 TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID, 157 VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0), 158 tps65086_ldoa23_ranges, 0, 0), 159 TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)), 160 TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)), 161 TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)), 162 TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)), 163 }; 164 165 static int tps65086_of_parse_cb(struct device_node *node, 166 const struct regulator_desc *desc, 167 struct regulator_config *config) 168 { 169 int ret; 170 171 /* Check for 25mV step mode */ 172 if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) { 173 switch (desc->id) { 174 case BUCK1: 175 case BUCK2: 176 case BUCK6: 177 regulators[desc->id].desc.linear_ranges = 178 tps65086_buck126_25mv_ranges; 179 regulators[desc->id].desc.n_linear_ranges = 180 ARRAY_SIZE(tps65086_buck126_25mv_ranges); 181 break; 182 case BUCK3: 183 case BUCK4: 184 case BUCK5: 185 regulators[desc->id].desc.linear_ranges = 186 tps65086_buck345_25mv_ranges; 187 regulators[desc->id].desc.n_linear_ranges = 188 ARRAY_SIZE(tps65086_buck345_25mv_ranges); 189 break; 190 default: 191 dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n"); 192 } 193 } 194 195 /* Check for decay mode */ 196 if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) { 197 ret = regmap_write_bits(config->regmap, 198 regulators[desc->id].decay_reg, 199 regulators[desc->id].decay_mask, 200 regulators[desc->id].decay_mask); 201 if (ret) { 202 dev_err(config->dev, "Error setting decay\n"); 203 return ret; 204 } 205 } 206 207 return 0; 208 } 209 210 static int tps65086_regulator_probe(struct platform_device *pdev) 211 { 212 struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent); 213 struct regulator_config config = { }; 214 struct regulator_dev *rdev; 215 int i; 216 217 platform_set_drvdata(pdev, tps); 218 219 config.dev = &pdev->dev; 220 config.dev->of_node = tps->dev->of_node; 221 config.driver_data = tps; 222 config.regmap = tps->regmap; 223 224 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 225 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, 226 &config); 227 if (IS_ERR(rdev)) { 228 dev_err(tps->dev, "failed to register %s regulator\n", 229 pdev->name); 230 return PTR_ERR(rdev); 231 } 232 } 233 234 return 0; 235 } 236 237 static const struct platform_device_id tps65086_regulator_id_table[] = { 238 { "tps65086-regulator", }, 239 { /* sentinel */ } 240 }; 241 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table); 242 243 static struct platform_driver tps65086_regulator_driver = { 244 .driver = { 245 .name = "tps65086-regulator", 246 }, 247 .probe = tps65086_regulator_probe, 248 .id_table = tps65086_regulator_id_table, 249 }; 250 module_platform_driver(tps65086_regulator_driver); 251 252 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); 253 MODULE_DESCRIPTION("TPS65086 Regulator driver"); 254 MODULE_LICENSE("GPL v2"); 255