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, _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 regulator_linear_range tps65217_uv1_ranges[] = { 60 REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000), 61 REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000), 62 REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000), 63 REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000), 64 REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0), 65 }; 66 67 static const struct regulator_linear_range tps65217_uv2_ranges[] = { 68 REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000), 69 REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000), 70 REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000), 71 }; 72 73 static int tps65217_pmic_enable(struct regulator_dev *dev) 74 { 75 struct tps65217 *tps = rdev_get_drvdata(dev); 76 int rid = rdev_get_id(dev); 77 78 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 79 return -EINVAL; 80 81 /* Enable the regulator and password protection is level 1 */ 82 return tps65217_set_bits(tps, TPS65217_REG_ENABLE, 83 dev->desc->enable_mask, dev->desc->enable_mask, 84 TPS65217_PROTECT_L1); 85 } 86 87 static int tps65217_pmic_disable(struct regulator_dev *dev) 88 { 89 struct tps65217 *tps = rdev_get_drvdata(dev); 90 int rid = rdev_get_id(dev); 91 92 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 93 return -EINVAL; 94 95 /* Disable the regulator and password protection is level 1 */ 96 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE, 97 dev->desc->enable_mask, TPS65217_PROTECT_L1); 98 } 99 100 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev, 101 unsigned selector) 102 { 103 int ret; 104 struct tps65217 *tps = rdev_get_drvdata(dev); 105 unsigned int rid = rdev_get_id(dev); 106 107 /* Set the voltage based on vsel value and write protect level is 2 */ 108 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask, 109 selector, TPS65217_PROTECT_L2); 110 111 /* Set GO bit for DCDCx to initiate voltage transistion */ 112 switch (rid) { 113 case TPS65217_DCDC_1 ... TPS65217_DCDC_3: 114 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW, 115 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO, 116 TPS65217_PROTECT_L2); 117 break; 118 } 119 120 return ret; 121 } 122 123 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev) 124 { 125 struct tps65217 *tps = rdev_get_drvdata(dev); 126 unsigned int rid = rdev_get_id(dev); 127 128 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 129 return -EINVAL; 130 131 return tps65217_clear_bits(tps, dev->desc->bypass_reg, 132 dev->desc->bypass_mask, 133 TPS65217_PROTECT_L1); 134 } 135 136 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev) 137 { 138 struct tps65217 *tps = rdev_get_drvdata(dev); 139 unsigned int rid = rdev_get_id(dev); 140 141 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4) 142 return -EINVAL; 143 144 if (!tps->strobes[rid]) 145 return -EINVAL; 146 147 return tps65217_set_bits(tps, dev->desc->bypass_reg, 148 dev->desc->bypass_mask, 149 tps->strobes[rid], TPS65217_PROTECT_L1); 150 } 151 152 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */ 153 static struct regulator_ops tps65217_pmic_ops = { 154 .is_enabled = regulator_is_enabled_regmap, 155 .enable = tps65217_pmic_enable, 156 .disable = tps65217_pmic_disable, 157 .get_voltage_sel = regulator_get_voltage_sel_regmap, 158 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 159 .list_voltage = regulator_list_voltage_linear_range, 160 .map_voltage = regulator_map_voltage_linear_range, 161 .set_suspend_enable = tps65217_pmic_set_suspend_enable, 162 .set_suspend_disable = tps65217_pmic_set_suspend_disable, 163 }; 164 165 /* Operations permitted on LDO1 */ 166 static struct regulator_ops tps65217_pmic_ldo1_ops = { 167 .is_enabled = regulator_is_enabled_regmap, 168 .enable = tps65217_pmic_enable, 169 .disable = tps65217_pmic_disable, 170 .get_voltage_sel = regulator_get_voltage_sel_regmap, 171 .set_voltage_sel = tps65217_pmic_set_voltage_sel, 172 .list_voltage = regulator_list_voltage_table, 173 .map_voltage = regulator_map_voltage_ascend, 174 .set_suspend_enable = tps65217_pmic_set_suspend_enable, 175 .set_suspend_disable = tps65217_pmic_set_suspend_disable, 176 }; 177 178 static const struct regulator_desc regulators[] = { 179 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1", 180 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1, 181 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN, 182 NULL, tps65217_uv1_ranges, 183 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, 184 TPS65217_SEQ1_DC1_SEQ_MASK), 185 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2", 186 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2, 187 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN, 188 NULL, tps65217_uv1_ranges, 189 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1, 190 TPS65217_SEQ1_DC2_SEQ_MASK), 191 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3", 192 tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3, 193 TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN, 194 NULL, tps65217_uv1_ranges, 195 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ2, 196 TPS65217_SEQ2_DC3_SEQ_MASK), 197 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1", 198 tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1, 199 TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN, 200 LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2, 201 TPS65217_SEQ2_LDO1_SEQ_MASK), 202 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops, 203 64, TPS65217_REG_DEFLDO2, 204 TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN, 205 NULL, tps65217_uv1_ranges, 206 ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3, 207 TPS65217_SEQ3_LDO2_SEQ_MASK), 208 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops, 209 32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK, 210 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN, 211 NULL, tps65217_uv2_ranges, 212 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3, 213 TPS65217_SEQ3_LDO3_SEQ_MASK), 214 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops, 215 32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK, 216 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN, 217 NULL, tps65217_uv2_ranges, 218 ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4, 219 TPS65217_SEQ4_LDO4_SEQ_MASK), 220 }; 221 222 static int tps65217_regulator_probe(struct platform_device *pdev) 223 { 224 struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent); 225 struct tps65217_board *pdata = dev_get_platdata(tps->dev); 226 struct regulator_dev *rdev; 227 struct regulator_config config = { }; 228 int i, ret; 229 unsigned int val; 230 231 /* Allocate memory for strobes */ 232 tps->strobes = devm_kcalloc(&pdev->dev, 233 TPS65217_NUM_REGULATOR, sizeof(u8), 234 GFP_KERNEL); 235 if (!tps->strobes) 236 return -ENOMEM; 237 238 platform_set_drvdata(pdev, tps); 239 240 for (i = 0; i < TPS65217_NUM_REGULATOR; i++) { 241 /* Register the regulators */ 242 config.dev = tps->dev; 243 if (pdata) 244 config.init_data = pdata->tps65217_init_data[i]; 245 config.driver_data = tps; 246 config.regmap = tps->regmap; 247 248 rdev = devm_regulator_register(&pdev->dev, ®ulators[i], 249 &config); 250 if (IS_ERR(rdev)) { 251 dev_err(tps->dev, "failed to register %s regulator\n", 252 pdev->name); 253 return PTR_ERR(rdev); 254 } 255 256 /* Store default strobe info */ 257 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val); 258 tps->strobes[i] = val & regulators[i].bypass_mask; 259 } 260 261 return 0; 262 } 263 264 static struct platform_driver tps65217_regulator_driver = { 265 .driver = { 266 .name = "tps65217-pmic", 267 }, 268 .probe = tps65217_regulator_probe, 269 }; 270 271 static int __init tps65217_regulator_init(void) 272 { 273 return platform_driver_register(&tps65217_regulator_driver); 274 } 275 subsys_initcall(tps65217_regulator_init); 276 277 static void __exit tps65217_regulator_exit(void) 278 { 279 platform_driver_unregister(&tps65217_regulator_driver); 280 } 281 module_exit(tps65217_regulator_exit); 282 283 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>"); 284 MODULE_DESCRIPTION("TPS65217 voltage regulator driver"); 285 MODULE_ALIAS("platform:tps65217-pmic"); 286 MODULE_LICENSE("GPL v2"); 287