1 /* 2 * tps65217-regulator.c 3 * 4 * Regulator driver for TPS65217 PMIC 5 * 6 * Copyright (C) 2011 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 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, _ops, _n, _vr, _vm, _em, _t, _lr, _nlr) \ 31 { \ 32 .name = _name, \ 33 .id = _id, \ 34 .ops = &_ops, \ 35 .n_voltages = _n, \ 36 .type = REGULATOR_VOLTAGE, \ 37 .owner = THIS_MODULE, \ 38 .vsel_reg = _vr, \ 39 .vsel_mask = _vm, \ 40 .enable_reg = TPS65217_REG_ENABLE, \ 41 .enable_mask = _em, \ 42 .volt_table = _t, \ 43 .linear_ranges = _lr, \ 44 .n_linear_ranges = _nlr, \ 45 } \ 46 47 static const unsigned int LDO1_VSEL_table[] = { 48 1000000, 1100000, 1200000, 1250000, 49 1300000, 1350000, 1400000, 1500000, 50 1600000, 1800000, 2500000, 2750000, 51 2800000, 3000000, 3100000, 3300000, 52 }; 53 54 static const struct regulator_linear_range tps65217_uv1_ranges[] = { 55 REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000), 56 REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000), 57 REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000), 58 REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000), 59 REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0), 60 }; 61 62 static const struct regulator_linear_range tps65217_uv2_ranges[] = { 63 REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000), 64 REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000), 65 REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000), 66 }; 67 68 static int tps65217_pmic_enable(struct regulator_dev *dev) 69 { 70 struct tps65217 *tps = rdev_get_drvdata(dev); 71 unsigned int rid = rdev_get_id(dev); 72 73 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 74 return -EINVAL; 75 76 /* Enable the regulator and password protection is level 1 */ 77 return tps65217_set_bits(tps, TPS65217_REG_ENABLE, 78 dev->desc->enable_mask, dev->desc->enable_mask, 79 TPS65217_PROTECT_L1); 80 } 81 82 static int tps65217_pmic_disable(struct regulator_dev *dev) 83 { 84 struct tps65217 *tps = rdev_get_drvdata(dev); 85 unsigned int rid = rdev_get_id(dev); 86 87 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 88 return -EINVAL; 89 90 /* Disable the regulator and password protection is level 1 */ 91 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, 92 dev->desc->enable_mask, TPS65217_PROTECT_L1); 93 } 94 95 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, 96 unsigned selector) 97 { 98 int ret; 99 struct tps65217 *tps = rdev_get_drvdata(dev); 100 unsigned int rid = rdev_get_id(dev); 101 102 /* Set the voltage based on vsel value and write protect level is 2 */ 103 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 104 selector, TPS65217_PROTECT_L2); 105 106 /* Set GO bit for DCDCx to initiate voltage transistion */ 107 switch (rid) { 108 case TPS65217_DCDC_1 ... TPS65217_DCDC_3: 109 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, 110 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, 111 TPS65217_PROTECT_L2); 112 break; 113 } 114 115 return ret; 116 } 117 118 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ 119 static struct regulator_ops tps65217_pmic_ops = { 120 .is_enabled = regulator_is_enabled_regmap, 121 .enable = tps65217_pmic_enable, 122 .disable = tps65217_pmic_disable, 123 .get_voltage_sel = regulator_get_voltage_sel_regmap, 124 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 125 .list_voltage = regulator_list_voltage_linear_range, 126 .map_voltage = regulator_map_voltage_linear_range, 127 }; 128 129 /* Operations permitted on LDO1 */ 130 static struct regulator_ops tps65217_pmic_ldo1_ops = { 131 .is_enabled = regulator_is_enabled_regmap, 132 .enable = tps65217_pmic_enable, 133 .disable = tps65217_pmic_disable, 134 .get_voltage_sel = regulator_get_voltage_sel_regmap, 135 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 136 .list_voltage = regulator_list_voltage_table, 137 }; 138 139 static const struct regulator_desc regulators[] = { 140 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64, 141 TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK, 142 TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges, 143 2), /* DCDC1 voltage range: 900000 ~ 1800000 */ 144 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64, 145 TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK, 146 TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges, 147 ARRAY_SIZE(tps65217_uv1_ranges)), 148 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64, 149 TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK, 150 TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges, 151 1), /* DCDC3 voltage range: 900000 ~ 1500000 */ 152 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16, 153 TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK, 154 TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0), 155 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64, 156 TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK, 157 TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges, 158 ARRAY_SIZE(tps65217_uv1_ranges)), 159 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32, 160 TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, 161 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, 162 NULL, tps65217_uv2_ranges, 163 ARRAY_SIZE(tps65217_uv2_ranges)), 164 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32, 165 TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, 166 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, 167 NULL, tps65217_uv2_ranges, 168 ARRAY_SIZE(tps65217_uv2_ranges)), 169 }; 170 171 #ifdef CONFIG_OF 172 static struct of_regulator_match reg_matches[] = { 173 { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 }, 174 { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 }, 175 { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 }, 176 { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 }, 177 { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 }, 178 { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 }, 179 { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 }, 180 }; 181 182 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) 183 { 184 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); 185 struct device_node *node = tps->dev->of_node; 186 struct tps65217_board *pdata; 187 struct device_node *regs; 188 int i, count; 189 190 regs = of_find_node_by_name(node, "regulators"); 191 if (!regs) 192 return NULL; 193 194 count = of_regulator_match(&pdev->dev, regs, reg_matches, 195 TPS65217_NUM_REGULATOR); 196 of_node_put(regs); 197 if ((count < 0) || (count > TPS65217_NUM_REGULATOR)) 198 return NULL; 199 200 pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); 201 if (!pdata) 202 return NULL; 203 204 for (i = 0; i < count; i++) { 205 if (!reg_matches[i].init_data || !reg_matches[i].of_node) 206 continue; 207 208 pdata->tps65217_init_data[i] = reg_matches[i].init_data; 209 pdata->of_node[i] = reg_matches[i].of_node; 210 } 211 212 return pdata; 213 } 214 #else 215 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev) 216 { 217 return NULL; 218 } 219 #endif 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_init_data *reg_data; 226 struct regulator_dev *rdev; 227 struct regulator_config config = { }; 228 int i; 229 230 if (tps->dev->of_node) 231 pdata = tps65217_parse_dt(pdev); 232 233 if (!pdata) { 234 dev_err(&pdev->dev, "Platform data not found\n"); 235 return -EINVAL; 236 } 237 238 if (tps65217_chip_id(tps) != TPS65217) { 239 dev_err(&pdev->dev, "Invalid tps chip version\n"); 240 return -ENODEV; 241 } 242 243 platform_set_drvdata(pdev, tps); 244 245 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { 246 247 reg_data = pdata->tps65217_init_data[i]; 248 249 /* 250 * Regulator API handles empty constraints but not NULL 251 * constraints 252 */ 253 if (!reg_data) 254 continue; 255 256 /* Register the regulators */ 257 config.dev = tps->dev; 258 config.init_data = reg_data; 259 config.driver_data = tps; 260 config.regmap = tps->regmap; 261 if (tps->dev->of_node) 262 config.of_node = pdata->of_node[i]; 263 264 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 265 &config); 266 if (IS_ERR(rdev)) { 267 dev_err(tps->dev, "failed to register %s regulator\n", 268 pdev->name); 269 return PTR_ERR(rdev); 270 } 271 272 /* Save regulator for cleanup */ 273 tps->rdev[i] = rdev; 274 } 275 return 0; 276 } 277 278 static struct platform_driver tps65217_regulator_driver = { 279 .driver = { 280 .name = "tps65217-pmic", 281 }, 282 .probe = tps65217_regulator_probe, 283 }; 284 285 static int __init tps65217_regulator_init(void) 286 { 287 return platform_driver_register(&tps65217_regulator_driver); 288 } 289 subsys_initcall(tps65217_regulator_init); 290 291 static void __exit tps65217_regulator_exit(void) 292 { 293 platform_driver_unregister(&tps65217_regulator_driver); 294 } 295 module_exit(tps65217_regulator_exit); 296 297 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); 298 MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); 299 MODULE_ALIAS("platform:tps65217-pmic"); 300 MODULE_LICENSE("GPL v2"); 301