drivers/regulator/qcom_smd-regulator.c

   1 /*
   2  * Copyright (c) 2015, Sony Mobile Communications AB.
   3  * Copyright (c) 2012-2013, The Linux Foundation. All rights reserved.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License version 2 and
   7  * only version 2 as published by the Free Software Foundation.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include <linux/module.h>
  16 #include <linux/of.h>
  17 #include <linux/of_device.h>
  18 #include <linux/platform_device.h>
  19 #include <linux/regulator/driver.h>
  20 #include <linux/regulator/machine.h>
  21 #include <linux/regulator/of_regulator.h>
  22 #include <linux/soc/qcom/smd-rpm.h>
  23
  24 struct qcom_rpm_reg {
  25         struct device *dev;
  26
  27         struct qcom_smd_rpm *rpm;
  28
  29         u32 type;
  30         u32 id;
  31
  32         struct regulator_desc desc;
  33
  34         int is_enabled;
  35         int uV;
  36 };
  37
  38 struct rpm_regulator_req {
  39         __le32 key;
  40         __le32 nbytes;
  41         __le32 value;
  42 };
  43
  44 #define RPM_KEY_SWEN    0x6e657773 /* "swen" */
  45 #define RPM_KEY_UV      0x00007675 /* "uv" */
  46 #define RPM_KEY_MA      0x0000616d /* "ma" */
  47
  48 static int rpm_reg_write_active(struct qcom_rpm_reg *vreg,
  49                                 struct rpm_regulator_req *req,
  50                                 size_t size)
  51 {
  52         return qcom_rpm_smd_write(vreg->rpm,
  53                                   QCOM_SMD_RPM_ACTIVE_STATE,
  54                                   vreg->type,
  55                                   vreg->id,
  56                                   req, size);
  57 }
  58
  59 static int rpm_reg_enable(struct regulator_dev *rdev)
  60 {
  61         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
  62         struct rpm_regulator_req req;
  63         int ret;
  64
  65         req.key = cpu_to_le32(RPM_KEY_SWEN);
  66         req.nbytes = cpu_to_le32(sizeof(u32));
  67         req.value = cpu_to_le32(1);
  68
  69         ret = rpm_reg_write_active(vreg, &req, sizeof(req));
  70         if (!ret)
  71                 vreg->is_enabled = 1;
  72
  73         return ret;
  74 }
  75
  76 static int rpm_reg_is_enabled(struct regulator_dev *rdev)
  77 {
  78         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
  79
  80         return vreg->is_enabled;
  81 }
  82
  83 static int rpm_reg_disable(struct regulator_dev *rdev)
  84 {
  85         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
  86         struct rpm_regulator_req req;
  87         int ret;
  88
  89         req.key = cpu_to_le32(RPM_KEY_SWEN);
  90         req.nbytes = cpu_to_le32(sizeof(u32));
  91         req.value = 0;
  92
  93         ret = rpm_reg_write_active(vreg, &req, sizeof(req));
  94         if (!ret)
  95                 vreg->is_enabled = 0;
  96
  97         return ret;
  98 }
  99
 100 static int rpm_reg_get_voltage(struct regulator_dev *rdev)
 101 {
 102         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
 103
 104         return vreg->uV;
 105 }
 106
 107 static int rpm_reg_set_voltage(struct regulator_dev *rdev,
 108                                int min_uV,
 109                                int max_uV,
 110                                unsigned *selector)
 111 {
 112         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
 113         struct rpm_regulator_req req;
 114         int ret = 0;
 115
 116         req.key = cpu_to_le32(RPM_KEY_UV);
 117         req.nbytes = cpu_to_le32(sizeof(u32));
 118         req.value = cpu_to_le32(min_uV);
 119
 120         ret = rpm_reg_write_active(vreg, &req, sizeof(req));
 121         if (!ret)
 122                 vreg->uV = min_uV;
 123
 124         return ret;
 125 }
 126
 127 static int rpm_reg_set_load(struct regulator_dev *rdev, int load_uA)
 128 {
 129         struct qcom_rpm_reg *vreg = rdev_get_drvdata(rdev);
 130         struct rpm_regulator_req req;
 131
 132         req.key = cpu_to_le32(RPM_KEY_MA);
 133         req.nbytes = cpu_to_le32(sizeof(u32));
 134         req.value = cpu_to_le32(load_uA / 1000);
 135
 136         return rpm_reg_write_active(vreg, &req, sizeof(req));
 137 }
 138
 139 static const struct regulator_ops rpm_smps_ldo_ops = {
 140         .enable = rpm_reg_enable,
 141         .disable = rpm_reg_disable,
 142         .is_enabled = rpm_reg_is_enabled,
 143
 144         .get_voltage = rpm_reg_get_voltage,
 145         .set_voltage = rpm_reg_set_voltage,
 146
 147         .set_load = rpm_reg_set_load,
 148 };
 149
 150 static const struct regulator_ops rpm_switch_ops = {
 151         .enable = rpm_reg_enable,
 152         .disable = rpm_reg_disable,
 153         .is_enabled = rpm_reg_is_enabled,
 154 };
 155
 156 static const struct regulator_desc pm8x41_hfsmps = {
 157         .linear_ranges = (struct regulator_linear_range[]) {
 158                 REGULATOR_LINEAR_RANGE( 375000,  0,  95, 12500),
 159                 REGULATOR_LINEAR_RANGE(1550000, 96, 158, 25000),
 160         },
 161         .n_linear_ranges = 2,
 162         .n_voltages = 159,
 163         .ops = &rpm_smps_ldo_ops,
 164 };
 165
 166 static const struct regulator_desc pm8841_ftsmps = {
 167         .linear_ranges = (struct regulator_linear_range[]) {
 168                 REGULATOR_LINEAR_RANGE(350000,  0, 184, 5000),
 169                 REGULATOR_LINEAR_RANGE(700000, 185, 339, 10000),
 170         },
 171         .n_linear_ranges = 2,
 172         .n_voltages = 340,
 173         .ops = &rpm_smps_ldo_ops,
 174 };
 175
 176 static const struct regulator_desc pm8941_boost = {
 177         .linear_ranges = (struct regulator_linear_range[]) {
 178                 REGULATOR_LINEAR_RANGE(4000000, 0, 15, 100000),
 179         },
 180         .n_linear_ranges = 1,
 181         .n_voltages = 16,
 182         .ops = &rpm_smps_ldo_ops,
 183 };
 184
 185 static const struct regulator_desc pm8941_pldo = {
 186         .linear_ranges = (struct regulator_linear_range[]) {
 187                 REGULATOR_LINEAR_RANGE( 750000,  0,  30, 25000),
 188                 REGULATOR_LINEAR_RANGE(1500000, 31, 99, 50000),
 189         },
 190         .n_linear_ranges = 2,
 191         .n_voltages = 100,
 192         .ops = &rpm_smps_ldo_ops,
 193 };
 194
 195 static const struct regulator_desc pm8941_nldo = {
 196         .linear_ranges = (struct regulator_linear_range[]) {
 197                 REGULATOR_LINEAR_RANGE(750000, 0, 63, 12500),
 198         },
 199         .n_linear_ranges = 1,
 200         .n_voltages = 64,
 201         .ops = &rpm_smps_ldo_ops,
 202 };
 203
 204 static const struct regulator_desc pm8941_lnldo = {
 205         .fixed_uV = 1740000,
 206         .n_voltages = 1,
 207         .ops = &rpm_smps_ldo_ops,
 208 };
 209
 210 static const struct regulator_desc pm8941_switch = {
 211         .ops = &rpm_switch_ops,
 212 };
 213
 214 struct rpm_regulator_data {
 215         const char *name;
 216         u32 type;
 217         u32 id;
 218         const struct regulator_desc *desc;
 219         const char *supply;
 220 };
 221
 222 static const struct rpm_regulator_data rpm_pm8841_regulators[] = {
 223         { "s1", QCOM_SMD_RPM_SMPB, 1, &pm8x41_hfsmps, "vdd_s1" },
 224         { "s2", QCOM_SMD_RPM_SMPB, 2, &pm8841_ftsmps, "vdd_s2" },
 225         { "s3", QCOM_SMD_RPM_SMPB, 3, &pm8x41_hfsmps, "vdd_s3" },
 226         { "s4", QCOM_SMD_RPM_SMPB, 4, &pm8841_ftsmps, "vdd_s4" },
 227         { "s5", QCOM_SMD_RPM_SMPB, 5, &pm8841_ftsmps, "vdd_s5" },
 228         { "s6", QCOM_SMD_RPM_SMPB, 6, &pm8841_ftsmps, "vdd_s6" },
 229         { "s7", QCOM_SMD_RPM_SMPB, 7, &pm8841_ftsmps, "vdd_s7" },
 230         { "s8", QCOM_SMD_RPM_SMPB, 8, &pm8841_ftsmps, "vdd_s8" },
 231         {}
 232 };
 233
 234 static const struct rpm_regulator_data rpm_pm8941_regulators[] = {
 235         { "s1", QCOM_SMD_RPM_SMPA, 1, &pm8x41_hfsmps, "vdd_s1" },
 236         { "s2", QCOM_SMD_RPM_SMPA, 2, &pm8x41_hfsmps, "vdd_s2" },
 237         { "s3", QCOM_SMD_RPM_SMPA, 3, &pm8x41_hfsmps, "vdd_s3" },
 238         { "s4", QCOM_SMD_RPM_BOOST, 1, &pm8941_boost },
 239
 240         { "l1", QCOM_SMD_RPM_LDOA, 1, &pm8941_nldo, "vdd_l1_l3" },
 241         { "l2", QCOM_SMD_RPM_LDOA, 2, &pm8941_nldo, "vdd_l2_lvs1_2_3" },
 242         { "l3", QCOM_SMD_RPM_LDOA, 3, &pm8941_nldo, "vdd_l1_l3" },
 243         { "l4", QCOM_SMD_RPM_LDOA, 4, &pm8941_nldo, "vdd_l4_l11" },
 244         { "l5", QCOM_SMD_RPM_LDOA, 5, &pm8941_lnldo, "vdd_l5_l7" },
 245         { "l6", QCOM_SMD_RPM_LDOA, 6, &pm8941_pldo, "vdd_l6_l12_l14_l15" },
 246         { "l7", QCOM_SMD_RPM_LDOA, 7, &pm8941_lnldo, "vdd_l5_l7" },
 247         { "l8", QCOM_SMD_RPM_LDOA, 8, &pm8941_pldo, "vdd_l8_l16_l18_l19" },
 248         { "l9", QCOM_SMD_RPM_LDOA, 9, &pm8941_pldo, "vdd_l9_l10_l17_l22" },
 249         { "l10", QCOM_SMD_RPM_LDOA, 10, &pm8941_pldo, "vdd_l9_l10_l17_l22" },
 250         { "l11", QCOM_SMD_RPM_LDOA, 11, &pm8941_nldo, "vdd_l4_l11" },
 251         { "l12", QCOM_SMD_RPM_LDOA, 12, &pm8941_pldo, "vdd_l6_l12_l14_l15" },
 252         { "l13", QCOM_SMD_RPM_LDOA, 13, &pm8941_pldo, "vdd_l13_l20_l23_l24" },
 253         { "l14", QCOM_SMD_RPM_LDOA, 14, &pm8941_pldo, "vdd_l6_l12_l14_l15" },
 254         { "l15", QCOM_SMD_RPM_LDOA, 15, &pm8941_pldo, "vdd_l6_l12_l14_l15" },
 255         { "l16", QCOM_SMD_RPM_LDOA, 16, &pm8941_pldo, "vdd_l8_l16_l18_l19" },
 256         { "l17", QCOM_SMD_RPM_LDOA, 17, &pm8941_pldo, "vdd_l9_l10_l17_l22" },
 257         { "l18", QCOM_SMD_RPM_LDOA, 18, &pm8941_pldo, "vdd_l8_l16_l18_l19" },
 258         { "l19", QCOM_SMD_RPM_LDOA, 19, &pm8941_pldo, "vdd_l8_l16_l18_l19" },
 259         { "l20", QCOM_SMD_RPM_LDOA, 20, &pm8941_pldo, "vdd_l13_l20_l23_l24" },
 260         { "l21", QCOM_SMD_RPM_LDOA, 21, &pm8941_pldo, "vdd_l21" },
 261         { "l22", QCOM_SMD_RPM_LDOA, 22, &pm8941_pldo, "vdd_l9_l10_l17_l22" },
 262         { "l23", QCOM_SMD_RPM_LDOA, 23, &pm8941_pldo, "vdd_l13_l20_l23_l24" },
 263         { "l24", QCOM_SMD_RPM_LDOA, 24, &pm8941_pldo, "vdd_l13_l20_l23_l24" },
 264
 265         { "lvs1", QCOM_SMD_RPM_VSA, 1, &pm8941_switch, "vdd_l2_lvs1_2_3" },
 266         { "lvs2", QCOM_SMD_RPM_VSA, 2, &pm8941_switch, "vdd_l2_lvs1_2_3" },
 267         { "lvs3", QCOM_SMD_RPM_VSA, 3, &pm8941_switch, "vdd_l2_lvs1_2_3" },
 268
 269         { "5vs1", QCOM_SMD_RPM_VSA, 4, &pm8941_switch, "vin_5vs" },
 270         { "5vs2", QCOM_SMD_RPM_VSA, 5, &pm8941_switch, "vin_5vs" },
 271
 272         {}
 273 };
 274
 275 static const struct of_device_id rpm_of_match[] = {
 276         { .compatible = "qcom,rpm-pm8841-regulators", .data = &rpm_pm8841_regulators },
 277         { .compatible = "qcom,rpm-pm8941-regulators", .data = &rpm_pm8941_regulators },
 278         {}
 279 };
 280 MODULE_DEVICE_TABLE(of, rpm_of_match);
 281
 282 static int rpm_reg_probe(struct platform_device *pdev)
 283 {
 284         const struct rpm_regulator_data *reg;
 285         const struct of_device_id *match;
 286         struct regulator_config config = { };
 287         struct regulator_dev *rdev;
 288         struct qcom_rpm_reg *vreg;
 289         struct qcom_smd_rpm *rpm;
 290
 291         rpm = dev_get_drvdata(pdev->dev.parent);
 292         if (!rpm) {
 293                 dev_err(&pdev->dev, "unable to retrieve handle to rpm\n");
 294                 return -ENODEV;
 295         }
 296
 297         match = of_match_device(rpm_of_match, &pdev->dev);
 298         for (reg = match->data; reg->name; reg++) {
 299                 vreg = devm_kzalloc(&pdev->dev, sizeof(*vreg), GFP_KERNEL);
 300                 if (!vreg)
 301                         return -ENOMEM;
 302
 303                 vreg->dev = &pdev->dev;
 304                 vreg->type = reg->type;
 305                 vreg->id = reg->id;
 306                 vreg->rpm = rpm;
 307
 308                 memcpy(&vreg->desc, reg->desc, sizeof(vreg->desc));
 309
 310                 vreg->desc.id = -1;
 311                 vreg->desc.owner = THIS_MODULE;
 312                 vreg->desc.type = REGULATOR_VOLTAGE;
 313                 vreg->desc.name = reg->name;
 314                 vreg->desc.supply_name = reg->supply;
 315                 vreg->desc.of_match = reg->name;
 316
 317                 config.dev = &pdev->dev;
 318                 config.driver_data = vreg;
 319                 rdev = devm_regulator_register(&pdev->dev, &vreg->desc, &config);
 320                 if (IS_ERR(rdev)) {
 321                         dev_err(&pdev->dev, "failed to register %s\n", reg->name);
 322                         return PTR_ERR(rdev);
 323                 }
 324         }
 325
 326         return 0;
 327 }
 328
 329 static struct platform_driver rpm_reg_driver = {
 330         .probe = rpm_reg_probe,
 331         .driver = {
 332                 .name  = "qcom_rpm_smd_regulator",
 333                 .of_match_table = rpm_of_match,
 334         },
 335 };
 336
 337 static int __init rpm_reg_init(void)
 338 {
 339         return platform_driver_register(&rpm_reg_driver);
 340 }
 341 subsys_initcall(rpm_reg_init);
 342
 343 static void __exit rpm_reg_exit(void)
 344 {
 345         platform_driver_unregister(&rpm_reg_driver);
 346 }
 347 module_exit(rpm_reg_exit)
 348
 349 MODULE_DESCRIPTION("Qualcomm RPM regulator driver");
 350 MODULE_LICENSE("GPL v2");