1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright (C) 2015 Texas Instruments Incorporated - https://www.ti.com/ 4 * 5 * Author: Andrew F. Davis <afd@ti.com> 6 * 7 * Based on the TPS65912 driver 8 */ 9 10 #include <linux/module.h> 11 #include <linux/of.h> 12 #include <linux/platform_device.h> 13 #include <linux/regulator/driver.h> 14 15 #include <linux/mfd/tps65086.h> 16 17 enum tps65086_regulators { BUCK1, BUCK2, BUCK3, BUCK4, BUCK5, BUCK6, LDOA1, 18 LDOA2, LDOA3, SWA1, SWB1, SWB2, VTT }; 19 20 #define TPS65086_REGULATOR(_name, _of, _id, _nv, _vr, _vm, _er, _em, _lr, _dr, _dm) \ 21 [_id] = { \ 22 .desc = { \ 23 .name = _name, \ 24 .of_match = of_match_ptr(_of), \ 25 .regulators_node = "regulators", \ 26 .of_parse_cb = tps65086_of_parse_cb, \ 27 .id = _id, \ 28 .ops = ®_ops, \ 29 .n_voltages = _nv, \ 30 .type = REGULATOR_VOLTAGE, \ 31 .owner = THIS_MODULE, \ 32 .vsel_reg = _vr, \ 33 .vsel_mask = _vm, \ 34 .enable_reg = _er, \ 35 .enable_mask = _em, \ 36 .volt_table = NULL, \ 37 .linear_ranges = _lr, \ 38 .n_linear_ranges = ARRAY_SIZE(_lr), \ 39 }, \ 40 .decay_reg = _dr, \ 41 .decay_mask = _dm, \ 42 } 43 44 #define TPS65086_SWITCH(_name, _of, _id, _er, _em) \ 45 [_id] = { \ 46 .desc = { \ 47 .name = _name, \ 48 .of_match = of_match_ptr(_of), \ 49 .regulators_node = "regulators", \ 50 .of_parse_cb = tps65086_of_parse_cb, \ 51 .id = _id, \ 52 .ops = &switch_ops, \ 53 .type = REGULATOR_VOLTAGE, \ 54 .owner = THIS_MODULE, \ 55 .enable_reg = _er, \ 56 .enable_mask = _em, \ 57 }, \ 58 } 59 60 struct tps65086_regulator { 61 struct regulator_desc desc; 62 unsigned int decay_reg; 63 unsigned int decay_mask; 64 }; 65 66 static const struct linear_range tps65086_10mv_ranges[] = { 67 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), 68 REGULATOR_LINEAR_RANGE(410000, 0x1, 0x7F, 10000), 69 }; 70 71 static const struct linear_range tps65086_buck126_25mv_ranges[] = { 72 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), 73 REGULATOR_LINEAR_RANGE(1000000, 0x1, 0x18, 0), 74 REGULATOR_LINEAR_RANGE(1025000, 0x19, 0x7F, 25000), 75 }; 76 77 static const struct linear_range tps65086_buck345_25mv_ranges[] = { 78 REGULATOR_LINEAR_RANGE(0, 0x0, 0x0, 0), 79 REGULATOR_LINEAR_RANGE(425000, 0x1, 0x7F, 25000), 80 }; 81 82 static const struct linear_range tps65086_ldoa1_ranges[] = { 83 REGULATOR_LINEAR_RANGE(1350000, 0x0, 0x0, 0), 84 REGULATOR_LINEAR_RANGE(1500000, 0x1, 0x7, 100000), 85 REGULATOR_LINEAR_RANGE(2300000, 0x8, 0xB, 100000), 86 REGULATOR_LINEAR_RANGE(2850000, 0xC, 0xD, 150000), 87 REGULATOR_LINEAR_RANGE(3300000, 0xE, 0xE, 0), 88 }; 89 90 static const struct linear_range tps65086_ldoa23_ranges[] = { 91 REGULATOR_LINEAR_RANGE(700000, 0x0, 0xD, 50000), 92 REGULATOR_LINEAR_RANGE(1400000, 0xE, 0xF, 100000), 93 }; 94 95 /* Operations permitted on regulators */ 96 static const struct regulator_ops reg_ops = { 97 .enable = regulator_enable_regmap, 98 .disable = regulator_disable_regmap, 99 .is_enabled = regulator_is_enabled_regmap, 100 .set_voltage_sel = regulator_set_voltage_sel_regmap, 101 .map_voltage = regulator_map_voltage_linear_range, 102 .get_voltage_sel = regulator_get_voltage_sel_regmap, 103 .list_voltage = regulator_list_voltage_linear_range, 104 }; 105 106 /* Operations permitted on load switches */ 107 static const struct regulator_ops switch_ops = { 108 .enable = regulator_enable_regmap, 109 .disable = regulator_disable_regmap, 110 .is_enabled = regulator_is_enabled_regmap, 111 }; 112 113 static int tps65086_of_parse_cb(struct device_node *dev, 114 const struct regulator_desc *desc, 115 struct regulator_config *config); 116 117 static struct tps65086_regulator regulators[] = { 118 TPS65086_REGULATOR("BUCK1", "buck1", BUCK1, 0x80, TPS65086_BUCK1CTRL, 119 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(0), 120 tps65086_10mv_ranges, TPS65086_BUCK1CTRL, 121 BIT(0)), 122 TPS65086_REGULATOR("BUCK2", "buck2", BUCK2, 0x80, TPS65086_BUCK2CTRL, 123 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(1), 124 tps65086_10mv_ranges, TPS65086_BUCK2CTRL, 125 BIT(0)), 126 TPS65086_REGULATOR("BUCK3", "buck3", BUCK3, 0x80, TPS65086_BUCK3VID, 127 BUCK_VID_MASK, TPS65086_BUCK123CTRL, BIT(2), 128 tps65086_10mv_ranges, TPS65086_BUCK3DECAY, 129 BIT(0)), 130 TPS65086_REGULATOR("BUCK4", "buck4", BUCK4, 0x80, TPS65086_BUCK4VID, 131 BUCK_VID_MASK, TPS65086_BUCK4CTRL, BIT(0), 132 tps65086_10mv_ranges, TPS65086_BUCK4VID, 133 BIT(0)), 134 TPS65086_REGULATOR("BUCK5", "buck5", BUCK5, 0x80, TPS65086_BUCK5VID, 135 BUCK_VID_MASK, TPS65086_BUCK5CTRL, BIT(0), 136 tps65086_10mv_ranges, TPS65086_BUCK5CTRL, 137 BIT(0)), 138 TPS65086_REGULATOR("BUCK6", "buck6", BUCK6, 0x80, TPS65086_BUCK6VID, 139 BUCK_VID_MASK, TPS65086_BUCK6CTRL, BIT(0), 140 tps65086_10mv_ranges, TPS65086_BUCK6CTRL, 141 BIT(0)), 142 TPS65086_REGULATOR("LDOA1", "ldoa1", LDOA1, 0xF, TPS65086_LDOA1CTRL, 143 VDOA1_VID_MASK, TPS65086_LDOA1CTRL, BIT(0), 144 tps65086_ldoa1_ranges, 0, 0), 145 TPS65086_REGULATOR("LDOA2", "ldoa2", LDOA2, 0x10, TPS65086_LDOA2VID, 146 VDOA23_VID_MASK, TPS65086_LDOA2CTRL, BIT(0), 147 tps65086_ldoa23_ranges, 0, 0), 148 TPS65086_REGULATOR("LDOA3", "ldoa3", LDOA3, 0x10, TPS65086_LDOA3VID, 149 VDOA23_VID_MASK, TPS65086_LDOA3CTRL, BIT(0), 150 tps65086_ldoa23_ranges, 0, 0), 151 TPS65086_SWITCH("SWA1", "swa1", SWA1, TPS65086_SWVTT_EN, BIT(5)), 152 TPS65086_SWITCH("SWB1", "swb1", SWB1, TPS65086_SWVTT_EN, BIT(6)), 153 TPS65086_SWITCH("SWB2", "swb2", SWB2, TPS65086_SWVTT_EN, BIT(7)), 154 TPS65086_SWITCH("VTT", "vtt", VTT, TPS65086_SWVTT_EN, BIT(4)), 155 }; 156 157 static int tps65086_of_parse_cb(struct device_node *node, 158 const struct regulator_desc *desc, 159 struct regulator_config *config) 160 { 161 int ret; 162 163 /* Check for 25mV step mode */ 164 if (of_property_read_bool(node, "ti,regulator-step-size-25mv")) { 165 switch (desc->id) { 166 case BUCK1: 167 case BUCK2: 168 case BUCK6: 169 regulators[desc->id].desc.linear_ranges = 170 tps65086_buck126_25mv_ranges; 171 regulators[desc->id].desc.n_linear_ranges = 172 ARRAY_SIZE(tps65086_buck126_25mv_ranges); 173 break; 174 case BUCK3: 175 case BUCK4: 176 case BUCK5: 177 regulators[desc->id].desc.linear_ranges = 178 tps65086_buck345_25mv_ranges; 179 regulators[desc->id].desc.n_linear_ranges = 180 ARRAY_SIZE(tps65086_buck345_25mv_ranges); 181 break; 182 default: 183 dev_warn(config->dev, "25mV step mode only valid for BUCK regulators\n"); 184 } 185 } 186 187 /* Check for decay mode */ 188 if (desc->id <= BUCK6 && of_property_read_bool(node, "ti,regulator-decay")) { 189 ret = regmap_write_bits(config->regmap, 190 regulators[desc->id].decay_reg, 191 regulators[desc->id].decay_mask, 192 regulators[desc->id].decay_mask); 193 if (ret) { 194 dev_err(config->dev, "Error setting decay\n"); 195 return ret; 196 } 197 } 198 199 return 0; 200 } 201 202 static int tps65086_regulator_probe(struct platform_device *pdev) 203 { 204 struct tps65086 *tps = dev_get_drvdata(pdev->dev.parent); 205 struct regulator_config config = { }; 206 struct regulator_dev *rdev; 207 int i; 208 209 platform_set_drvdata(pdev, tps); 210 211 config.dev = &pdev->dev; 212 config.dev->of_node = tps->dev->of_node; 213 config.driver_data = tps; 214 config.regmap = tps->regmap; 215 216 for (i = 0; i < ARRAY_SIZE(regulators); i++) { 217 rdev = devm_regulator_register(&pdev->dev, ®ulators[i].desc, 218 &config); 219 if (IS_ERR(rdev)) { 220 dev_err(tps->dev, "failed to register %s regulator\n", 221 pdev->name); 222 return PTR_ERR(rdev); 223 } 224 } 225 226 return 0; 227 } 228 229 static const struct platform_device_id tps65086_regulator_id_table[] = { 230 { "tps65086-regulator", }, 231 { /* sentinel */ } 232 }; 233 MODULE_DEVICE_TABLE(platform, tps65086_regulator_id_table); 234 235 static struct platform_driver tps65086_regulator_driver = { 236 .driver = { 237 .name = "tps65086-regulator", 238 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 239 }, 240 .probe = tps65086_regulator_probe, 241 .id_table = tps65086_regulator_id_table, 242 }; 243 module_platform_driver(tps65086_regulator_driver); 244 245 MODULE_AUTHOR("Andrew F. Davis <afd@ti.com>"); 246 MODULE_DESCRIPTION("TPS65086 Regulator driver"); 247 MODULE_LICENSE("GPL v2"); 248