1 /* 2 * tps65217-regulator.c 3 * 4 * Regulator driver for TPS65217 PMIC 5 * 6 * Copyright (C) 2011 Texas Instruments Incorporated - https://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, _of_match, _ops, _n, _vr, _vm, _em, \ 31 _t, _lr, _nlr, _sr, _sm) \ 32 { \ 33 .name = _name, \ 34 .id = _id, \ 35 .of_match = of_match_ptr(_of_match), \ 36 .regulators_node= of_match_ptr("regulators"), \ 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 = TPS65217_REG_ENABLE, \ 44 .enable_mask = _em, \ 45 .volt_table = _t, \ 46 .linear_ranges = _lr, \ 47 .n_linear_ranges = _nlr, \ 48 .bypass_reg = _sr, \ 49 .bypass_mask = _sm, \ 50 } \ 51 52 static const unsigned int LDO1_VSEL_table[] = { 53 1000000, 1100000, 1200000, 1250000, 54 1300000, 1350000, 1400000, 1500000, 55 1600000, 1800000, 2500000, 2750000, 56 2800000, 3000000, 3100000, 3300000, 57 }; 58 59 static const struct linear_range tps65217_uv1_ranges[] = { 60 REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000), 61 REGULATOR_LINEAR_RANGE(1550000, 25, 52, 50000), 62 REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000), 63 REGULATOR_LINEAR_RANGE(3300000, 56, 63, 0), 64 }; 65 66 static const struct linear_range tps65217_uv2_ranges[] = { 67 REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000), 68 REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000), 69 REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000), 70 }; 71 72 static int tps65217_pmic_enable(struct regulator_dev *dev) 73 { 74 struct tps65217 *tps = rdev_get_drvdata(dev); 75 int rid = rdev_get_id(dev); 76 77 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 78 return -EINVAL; 79 80 /* Enable the regulator and password protection is level 1 */ 81 return tps65217_set_bits(tps, TPS65217_REG_ENABLE, 82 dev->desc->enable_mask, dev->desc->enable_mask, 83 TPS65217_PROTECT_L1); 84 } 85 86 static int tps65217_pmic_disable(struct regulator_dev *dev) 87 { 88 struct tps65217 *tps = rdev_get_drvdata(dev); 89 int rid = rdev_get_id(dev); 90 91 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 92 return -EINVAL; 93 94 /* Disable the regulator and password protection is level 1 */ 95 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, 96 dev->desc->enable_mask, TPS65217_PROTECT_L1); 97 } 98 99 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, 100 unsigned selector) 101 { 102 int ret; 103 struct tps65217 *tps = rdev_get_drvdata(dev); 104 unsigned int rid = rdev_get_id(dev); 105 106 /* Set the voltage based on vsel value and write protect level is 2 */ 107 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 108 selector, TPS65217_PROTECT_L2); 109 110 /* Set GO bit for DCDCx to initiate voltage transistion */ 111 switch (rid) { 112 case TPS65217_DCDC_1 ... TPS65217_DCDC_3: 113 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, 114 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, 115 TPS65217_PROTECT_L2); 116 break; 117 } 118 119 return ret; 120 } 121 122 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev) 123 { 124 struct tps65217 *tps = rdev_get_drvdata(dev); 125 unsigned int rid = rdev_get_id(dev); 126 127 if (rid > TPS65217_LDO_4) 128 return -EINVAL; 129 130 return tps65217_clear_bits(tps, dev->desc->bypass_reg, 131 dev->desc->bypass_mask, 132 TPS65217_PROTECT_L1); 133 } 134 135 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev) 136 { 137 struct tps65217 *tps = rdev_get_drvdata(dev); 138 unsigned int rid = rdev_get_id(dev); 139 140 if (rid > TPS65217_LDO_4) 141 return -EINVAL; 142 143 if (!tps->strobes[rid]) 144 return -EINVAL; 145 146 return tps65217_set_bits(tps, dev->desc->bypass_reg, 147 dev->desc->bypass_mask, 148 tps->strobes[rid], TPS65217_PROTECT_L1); 149 } 150 151 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ 152 static const struct regulator_ops tps65217_pmic_ops = { 153 .is_enabled = regulator_is_enabled_regmap, 154 .enable = tps65217_pmic_enable, 155 .disable = tps65217_pmic_disable, 156 .get_voltage_sel = regulator_get_voltage_sel_regmap, 157 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 158 .list_voltage = regulator_list_voltage_linear_range, 159 .map_voltage = regulator_map_voltage_linear_range, 160 .set_suspend_enable = tps65217_pmic_set_suspend_enable, 161 .set_suspend_disable = tps65217_pmic_set_suspend_disable, 162 }; 163 164 /* Operations permitted on LDO1 */ 165 static const struct regulator_ops tps65217_pmic_ldo1_ops = { 166 .is_enabled = regulator_is_enabled_regmap, 167 .enable = tps65217_pmic_enable, 168 .disable = tps65217_pmic_disable, 169 .get_voltage_sel = regulator_get_voltage_sel_regmap, 170 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 171 .list_voltage = regulator_list_voltage_table, 172 .map_voltage = regulator_map_voltage_ascend, 173 .set_suspend_enable = tps65217_pmic_set_suspend_enable, 174 .set_suspend_disable = tps65217_pmic_set_suspend_disable, 175 }; 176 177 static const struct regulator_desc regulators[] = { 178 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1", 179 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1, 180 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN, 181 NULL, tps65217_uv1_ranges, 182 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, 183 TPS65217_SEQ1_DC1_SEQ_MASK), 184 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2", 185 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2, 186 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN, 187 NULL, tps65217_uv1_ranges, 188 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, 189 TPS65217_SEQ1_DC2_SEQ_MASK), 190 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3", 191 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3, 192 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN, 193 NULL, tps65217_uv1_ranges, 194 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2, 195 TPS65217_SEQ2_DC3_SEQ_MASK), 196 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1", 197 tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1, 198 TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN, 199 LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2, 200 TPS65217_SEQ2_LDO1_SEQ_MASK), 201 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops, 202 64, TPS65217_REG_DEFLDO2, 203 TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN, 204 NULL, tps65217_uv1_ranges, 205 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3, 206 TPS65217_SEQ3_LDO2_SEQ_MASK), 207 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops, 208 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, 209 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, 210 NULL, tps65217_uv2_ranges, 211 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3, 212 TPS65217_SEQ3_LDO3_SEQ_MASK), 213 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops, 214 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, 215 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, 216 NULL, tps65217_uv2_ranges, 217 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4, 218 TPS65217_SEQ4_LDO4_SEQ_MASK), 219 }; 220 221 static int tps65217_regulator_probe(struct platform_device *pdev) 222 { 223 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); 224 struct tps65217_board *pdata = dev_get_platdata(tps->dev); 225 struct regulator_dev *rdev; 226 struct regulator_config config = { }; 227 int i, ret; 228 unsigned int val; 229 230 /* Allocate memory for strobes */ 231 tps->strobes = devm_kcalloc(&pdev->dev, 232 TPS65217_NUM_REGULATOR, sizeof(u8), 233 GFP_KERNEL); 234 if (!tps->strobes) 235 return -ENOMEM; 236 237 platform_set_drvdata(pdev, tps); 238 239 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { 240 /* Register the regulators */ 241 config.dev = tps->dev; 242 if (pdata) 243 config.init_data = pdata->tps65217_init_data[i]; 244 config.driver_data = tps; 245 config.regmap = tps->regmap; 246 247 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 248 &config); 249 if (IS_ERR(rdev)) { 250 dev_err(tps->dev, "failed to register %s regulator\n", 251 pdev->name); 252 return PTR_ERR(rdev); 253 } 254 255 /* Store default strobe info */ 256 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val); 257 if (ret) 258 return ret; 259 260 tps->strobes[i] = val & regulators[i].bypass_mask; 261 } 262 263 return 0; 264 } 265 266 static struct platform_driver tps65217_regulator_driver = { 267 .driver = { 268 .name = "tps65217-pmic", 269 }, 270 .probe = tps65217_regulator_probe, 271 }; 272 273 static int __init tps65217_regulator_init(void) 274 { 275 return platform_driver_register(&tps65217_regulator_driver); 276 } 277 subsys_initcall(tps65217_regulator_init); 278 279 static void __exit tps65217_regulator_exit(void) 280 { 281 platform_driver_unregister(&tps65217_regulator_driver); 282 } 283 module_exit(tps65217_regulator_exit); 284 285 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); 286 MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); 287 MODULE_ALIAS("platform:tps65217-pmic"); 288 MODULE_LICENSE("GPL v2"); 289