Axel Lin | 0ae3b06 | 2019-05-03 13:36:36 +0800 | [diff] [blame] | 1 | // SPDX-License-Identifier: GPL-2.0+ |
| 2 | // |
| 3 | // pv88090-regulator.c - Regulator device driver for PV88090 |
| 4 | // Copyright (C) 2015 Powerventure Semiconductor Ltd. |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 5 | |
| 6 | #include <linux/err.h> |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 7 | #include <linux/i2c.h> |
| 8 | #include <linux/module.h> |
| 9 | #include <linux/init.h> |
| 10 | #include <linux/slab.h> |
| 11 | #include <linux/regulator/driver.h> |
| 12 | #include <linux/regulator/machine.h> |
| 13 | #include <linux/regmap.h> |
| 14 | #include <linux/irq.h> |
| 15 | #include <linux/interrupt.h> |
| 16 | #include <linux/regulator/of_regulator.h> |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 17 | #include "pv88090-regulator.h" |
| 18 | |
| 19 | #define PV88090_MAX_REGULATORS 5 |
| 20 | |
| 21 | /* PV88090 REGULATOR IDs */ |
| 22 | enum { |
| 23 | /* BUCKs */ |
| 24 | PV88090_ID_BUCK1, |
| 25 | PV88090_ID_BUCK2, |
| 26 | PV88090_ID_BUCK3, |
| 27 | |
| 28 | /* LDOs */ |
| 29 | PV88090_ID_LDO1, |
| 30 | PV88090_ID_LDO2, |
| 31 | }; |
| 32 | |
| 33 | struct pv88090_regulator { |
| 34 | struct regulator_desc desc; |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 35 | unsigned int conf; |
| 36 | unsigned int conf2; |
| 37 | }; |
| 38 | |
| 39 | struct pv88090 { |
| 40 | struct device *dev; |
| 41 | struct regmap *regmap; |
| 42 | struct regulator_dev *rdev[PV88090_MAX_REGULATORS]; |
| 43 | }; |
| 44 | |
| 45 | struct pv88090_buck_voltage { |
| 46 | int min_uV; |
| 47 | int max_uV; |
| 48 | int uV_step; |
| 49 | }; |
| 50 | |
| 51 | static const struct regmap_config pv88090_regmap_config = { |
| 52 | .reg_bits = 8, |
| 53 | .val_bits = 8, |
| 54 | }; |
| 55 | |
| 56 | /* Current limits array (in uA) for BUCK1, BUCK2, BUCK3. |
| 57 | * Entry indexes corresponds to register values. |
| 58 | */ |
| 59 | |
Axel Lin | f4afd05 | 2019-02-28 21:40:21 +0800 | [diff] [blame] | 60 | static const unsigned int pv88090_buck1_limits[] = { |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 61 | 220000, 440000, 660000, 880000, 1100000, 1320000, 1540000, 1760000, |
| 62 | 1980000, 2200000, 2420000, 2640000, 2860000, 3080000, 3300000, 3520000, |
| 63 | 3740000, 3960000, 4180000, 4400000, 4620000, 4840000, 5060000, 5280000, |
| 64 | 5500000, 5720000, 5940000, 6160000, 6380000, 6600000, 6820000, 7040000 |
| 65 | }; |
| 66 | |
Axel Lin | f4afd05 | 2019-02-28 21:40:21 +0800 | [diff] [blame] | 67 | static const unsigned int pv88090_buck23_limits[] = { |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 68 | 1496000, 2393000, 3291000, 4189000 |
| 69 | }; |
| 70 | |
| 71 | static const struct pv88090_buck_voltage pv88090_buck_vol[3] = { |
| 72 | { |
| 73 | .min_uV = 600000, |
| 74 | .max_uV = 1393750, |
| 75 | .uV_step = 6250, |
| 76 | }, |
| 77 | |
| 78 | { |
| 79 | .min_uV = 1400000, |
| 80 | .max_uV = 2193750, |
| 81 | .uV_step = 6250, |
| 82 | }, |
| 83 | { |
| 84 | .min_uV = 1250000, |
| 85 | .max_uV = 2837500, |
| 86 | .uV_step = 12500, |
| 87 | }, |
| 88 | }; |
| 89 | |
| 90 | static unsigned int pv88090_buck_get_mode(struct regulator_dev *rdev) |
| 91 | { |
| 92 | struct pv88090_regulator *info = rdev_get_drvdata(rdev); |
| 93 | unsigned int data; |
| 94 | int ret, mode = 0; |
| 95 | |
| 96 | ret = regmap_read(rdev->regmap, info->conf, &data); |
| 97 | if (ret < 0) |
| 98 | return ret; |
| 99 | |
| 100 | switch (data & PV88090_BUCK1_MODE_MASK) { |
| 101 | case PV88090_BUCK_MODE_SYNC: |
| 102 | mode = REGULATOR_MODE_FAST; |
| 103 | break; |
| 104 | case PV88090_BUCK_MODE_AUTO: |
| 105 | mode = REGULATOR_MODE_NORMAL; |
| 106 | break; |
| 107 | case PV88090_BUCK_MODE_SLEEP: |
| 108 | mode = REGULATOR_MODE_STANDBY; |
| 109 | break; |
| 110 | } |
| 111 | |
| 112 | return mode; |
| 113 | } |
| 114 | |
| 115 | static int pv88090_buck_set_mode(struct regulator_dev *rdev, |
| 116 | unsigned int mode) |
| 117 | { |
| 118 | struct pv88090_regulator *info = rdev_get_drvdata(rdev); |
| 119 | int val = 0; |
| 120 | |
| 121 | switch (mode) { |
| 122 | case REGULATOR_MODE_FAST: |
| 123 | val = PV88090_BUCK_MODE_SYNC; |
| 124 | break; |
| 125 | case REGULATOR_MODE_NORMAL: |
| 126 | val = PV88090_BUCK_MODE_AUTO; |
| 127 | break; |
| 128 | case REGULATOR_MODE_STANDBY: |
| 129 | val = PV88090_BUCK_MODE_SLEEP; |
| 130 | break; |
| 131 | default: |
| 132 | return -EINVAL; |
| 133 | } |
| 134 | |
| 135 | return regmap_update_bits(rdev->regmap, info->conf, |
| 136 | PV88090_BUCK1_MODE_MASK, val); |
| 137 | } |
| 138 | |
Bhumika Goyal | 36fe20c | 2017-01-28 20:45:39 +0530 | [diff] [blame] | 139 | static const struct regulator_ops pv88090_buck_ops = { |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 140 | .get_mode = pv88090_buck_get_mode, |
| 141 | .set_mode = pv88090_buck_set_mode, |
| 142 | .enable = regulator_enable_regmap, |
| 143 | .disable = regulator_disable_regmap, |
| 144 | .is_enabled = regulator_is_enabled_regmap, |
| 145 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| 146 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| 147 | .list_voltage = regulator_list_voltage_linear, |
Axel Lin | f4afd05 | 2019-02-28 21:40:21 +0800 | [diff] [blame] | 148 | .set_current_limit = regulator_set_current_limit_regmap, |
| 149 | .get_current_limit = regulator_get_current_limit_regmap, |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 150 | }; |
| 151 | |
Bhumika Goyal | 36fe20c | 2017-01-28 20:45:39 +0530 | [diff] [blame] | 152 | static const struct regulator_ops pv88090_ldo_ops = { |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 153 | .enable = regulator_enable_regmap, |
| 154 | .disable = regulator_disable_regmap, |
| 155 | .is_enabled = regulator_is_enabled_regmap, |
| 156 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
| 157 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
| 158 | .list_voltage = regulator_list_voltage_linear, |
| 159 | }; |
| 160 | |
| 161 | #define PV88090_BUCK(chip, regl_name, min, step, max, limits_array) \ |
| 162 | {\ |
| 163 | .desc = {\ |
| 164 | .id = chip##_ID_##regl_name,\ |
| 165 | .name = __stringify(chip##_##regl_name),\ |
| 166 | .of_match = of_match_ptr(#regl_name),\ |
| 167 | .regulators_node = of_match_ptr("regulators"),\ |
| 168 | .type = REGULATOR_VOLTAGE,\ |
| 169 | .owner = THIS_MODULE,\ |
| 170 | .ops = &pv88090_buck_ops,\ |
| 171 | .min_uV = min, \ |
| 172 | .uV_step = step, \ |
| 173 | .n_voltages = ((max) - (min))/(step) + 1, \ |
| 174 | .enable_reg = PV88090_REG_##regl_name##_CONF0, \ |
| 175 | .enable_mask = PV88090_##regl_name##_EN, \ |
| 176 | .vsel_reg = PV88090_REG_##regl_name##_CONF0, \ |
| 177 | .vsel_mask = PV88090_V##regl_name##_MASK, \ |
Axel Lin | f4afd05 | 2019-02-28 21:40:21 +0800 | [diff] [blame] | 178 | .curr_table = limits_array, \ |
| 179 | .n_current_limits = ARRAY_SIZE(limits_array), \ |
| 180 | .csel_reg = PV88090_REG_##regl_name##_CONF1, \ |
| 181 | .csel_mask = PV88090_##regl_name##_ILIM_MASK, \ |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 182 | },\ |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 183 | .conf = PV88090_REG_##regl_name##_CONF1, \ |
| 184 | .conf2 = PV88090_REG_##regl_name##_CONF2, \ |
| 185 | } |
| 186 | |
| 187 | #define PV88090_LDO(chip, regl_name, min, step, max) \ |
| 188 | {\ |
| 189 | .desc = {\ |
| 190 | .id = chip##_ID_##regl_name,\ |
| 191 | .name = __stringify(chip##_##regl_name),\ |
| 192 | .of_match = of_match_ptr(#regl_name),\ |
| 193 | .regulators_node = of_match_ptr("regulators"),\ |
| 194 | .type = REGULATOR_VOLTAGE,\ |
| 195 | .owner = THIS_MODULE,\ |
| 196 | .ops = &pv88090_ldo_ops,\ |
| 197 | .min_uV = min, \ |
| 198 | .uV_step = step, \ |
| 199 | .n_voltages = ((max) - (min))/(step) + 1, \ |
| 200 | .enable_reg = PV88090_REG_##regl_name##_CONT, \ |
| 201 | .enable_mask = PV88090_##regl_name##_EN, \ |
| 202 | .vsel_reg = PV88090_REG_##regl_name##_CONT, \ |
| 203 | .vsel_mask = PV88090_V##regl_name##_MASK, \ |
| 204 | },\ |
| 205 | } |
| 206 | |
| 207 | static struct pv88090_regulator pv88090_regulator_info[] = { |
| 208 | PV88090_BUCK(PV88090, BUCK1, 600000, 6250, 1393750, |
| 209 | pv88090_buck1_limits), |
| 210 | PV88090_BUCK(PV88090, BUCK2, 600000, 6250, 1393750, |
| 211 | pv88090_buck23_limits), |
| 212 | PV88090_BUCK(PV88090, BUCK3, 600000, 6250, 1393750, |
| 213 | pv88090_buck23_limits), |
| 214 | PV88090_LDO(PV88090, LDO1, 1200000, 50000, 4350000), |
| 215 | PV88090_LDO(PV88090, LDO2, 650000, 25000, 2225000), |
| 216 | }; |
| 217 | |
| 218 | static irqreturn_t pv88090_irq_handler(int irq, void *data) |
| 219 | { |
| 220 | struct pv88090 *chip = data; |
| 221 | int i, reg_val, err, ret = IRQ_NONE; |
| 222 | |
| 223 | err = regmap_read(chip->regmap, PV88090_REG_EVENT_A, ®_val); |
| 224 | if (err < 0) |
| 225 | goto error_i2c; |
| 226 | |
| 227 | if (reg_val & PV88090_E_VDD_FLT) { |
| 228 | for (i = 0; i < PV88090_MAX_REGULATORS; i++) { |
| 229 | if (chip->rdev[i] != NULL) { |
Steve Twiss | 275513b | 2019-02-26 15:46:55 +0000 | [diff] [blame] | 230 | regulator_lock(chip->rdev[i]); |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 231 | regulator_notifier_call_chain(chip->rdev[i], |
| 232 | REGULATOR_EVENT_UNDER_VOLTAGE, |
| 233 | NULL); |
Steve Twiss | 275513b | 2019-02-26 15:46:55 +0000 | [diff] [blame] | 234 | regulator_unlock(chip->rdev[i]); |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 235 | } |
| 236 | } |
| 237 | |
James Ban | 623f7b9 | 2016-03-07 16:08:20 +0900 | [diff] [blame] | 238 | err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
| 239 | PV88090_E_VDD_FLT); |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 240 | if (err < 0) |
| 241 | goto error_i2c; |
| 242 | |
| 243 | ret = IRQ_HANDLED; |
| 244 | } |
| 245 | |
| 246 | if (reg_val & PV88090_E_OVER_TEMP) { |
| 247 | for (i = 0; i < PV88090_MAX_REGULATORS; i++) { |
| 248 | if (chip->rdev[i] != NULL) { |
Steve Twiss | 275513b | 2019-02-26 15:46:55 +0000 | [diff] [blame] | 249 | regulator_lock(chip->rdev[i]); |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 250 | regulator_notifier_call_chain(chip->rdev[i], |
| 251 | REGULATOR_EVENT_OVER_TEMP, |
| 252 | NULL); |
Steve Twiss | 275513b | 2019-02-26 15:46:55 +0000 | [diff] [blame] | 253 | regulator_unlock(chip->rdev[i]); |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 254 | } |
| 255 | } |
| 256 | |
James Ban | 623f7b9 | 2016-03-07 16:08:20 +0900 | [diff] [blame] | 257 | err = regmap_write(chip->regmap, PV88090_REG_EVENT_A, |
| 258 | PV88090_E_OVER_TEMP); |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 259 | if (err < 0) |
| 260 | goto error_i2c; |
| 261 | |
| 262 | ret = IRQ_HANDLED; |
| 263 | } |
| 264 | |
| 265 | return ret; |
| 266 | |
| 267 | error_i2c: |
| 268 | dev_err(chip->dev, "I2C error : %d\n", err); |
| 269 | return IRQ_NONE; |
| 270 | } |
| 271 | |
| 272 | /* |
| 273 | * I2C driver interface functions |
| 274 | */ |
| 275 | static int pv88090_i2c_probe(struct i2c_client *i2c, |
| 276 | const struct i2c_device_id *id) |
| 277 | { |
| 278 | struct regulator_init_data *init_data = dev_get_platdata(&i2c->dev); |
| 279 | struct pv88090 *chip; |
| 280 | struct regulator_config config = { }; |
| 281 | int error, i, ret = 0; |
| 282 | unsigned int conf2, range, index; |
| 283 | |
| 284 | chip = devm_kzalloc(&i2c->dev, sizeof(struct pv88090), GFP_KERNEL); |
| 285 | if (!chip) |
| 286 | return -ENOMEM; |
| 287 | |
| 288 | chip->dev = &i2c->dev; |
| 289 | chip->regmap = devm_regmap_init_i2c(i2c, &pv88090_regmap_config); |
| 290 | if (IS_ERR(chip->regmap)) { |
| 291 | error = PTR_ERR(chip->regmap); |
| 292 | dev_err(chip->dev, "Failed to allocate register map: %d\n", |
| 293 | error); |
| 294 | return error; |
| 295 | } |
| 296 | |
| 297 | i2c_set_clientdata(i2c, chip); |
| 298 | |
| 299 | if (i2c->irq != 0) { |
| 300 | ret = regmap_write(chip->regmap, PV88090_REG_MASK_A, 0xFF); |
| 301 | if (ret < 0) { |
| 302 | dev_err(chip->dev, |
| 303 | "Failed to mask A reg: %d\n", ret); |
| 304 | return ret; |
| 305 | } |
| 306 | |
| 307 | ret = regmap_write(chip->regmap, PV88090_REG_MASK_B, 0xFF); |
| 308 | if (ret < 0) { |
| 309 | dev_err(chip->dev, |
| 310 | "Failed to mask B reg: %d\n", ret); |
| 311 | return ret; |
| 312 | } |
| 313 | |
Axel Lin | ecee988 | 2015-12-10 18:11:58 +0800 | [diff] [blame] | 314 | ret = devm_request_threaded_irq(&i2c->dev, i2c->irq, NULL, |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 315 | pv88090_irq_handler, |
| 316 | IRQF_TRIGGER_LOW|IRQF_ONESHOT, |
| 317 | "pv88090", chip); |
| 318 | if (ret != 0) { |
| 319 | dev_err(chip->dev, "Failed to request IRQ: %d\n", |
| 320 | i2c->irq); |
| 321 | return ret; |
| 322 | } |
| 323 | |
| 324 | ret = regmap_update_bits(chip->regmap, PV88090_REG_MASK_A, |
| 325 | PV88090_M_VDD_FLT | PV88090_M_OVER_TEMP, 0); |
| 326 | if (ret < 0) { |
| 327 | dev_err(chip->dev, |
| 328 | "Failed to update mask reg: %d\n", ret); |
| 329 | return ret; |
| 330 | } |
| 331 | |
| 332 | } else { |
| 333 | dev_warn(chip->dev, "No IRQ configured\n"); |
| 334 | } |
| 335 | |
| 336 | config.dev = chip->dev; |
| 337 | config.regmap = chip->regmap; |
| 338 | |
| 339 | for (i = 0; i < PV88090_MAX_REGULATORS; i++) { |
| 340 | if (init_data) |
| 341 | config.init_data = &init_data[i]; |
| 342 | |
| 343 | if (i == PV88090_ID_BUCK2 || i == PV88090_ID_BUCK3) { |
| 344 | ret = regmap_read(chip->regmap, |
| 345 | pv88090_regulator_info[i].conf2, &conf2); |
| 346 | if (ret < 0) |
| 347 | return ret; |
| 348 | |
Dan Carpenter | d761c90 | 2015-12-12 15:38:43 +0300 | [diff] [blame] | 349 | conf2 = (conf2 >> PV88090_BUCK_VDAC_RANGE_SHIFT) & |
| 350 | PV88090_BUCK_VDAC_RANGE_MASK; |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 351 | |
| 352 | ret = regmap_read(chip->regmap, |
| 353 | PV88090_REG_BUCK_FOLD_RANGE, &range); |
| 354 | if (ret < 0) |
| 355 | return ret; |
| 356 | |
Dan Carpenter | d761c90 | 2015-12-12 15:38:43 +0300 | [diff] [blame] | 357 | range = (range >> |
Eric Jeong | 8986a11 | 2017-08-30 17:54:27 +0900 | [diff] [blame] | 358 | (PV88090_BUCK_VRANGE_GAIN_SHIFT + i - 1)) & |
| 359 | PV88090_BUCK_VRANGE_GAIN_MASK; |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 360 | index = ((range << 1) | conf2); |
Eric Jeong | 8986a11 | 2017-08-30 17:54:27 +0900 | [diff] [blame] | 361 | if (index > PV88090_ID_BUCK3) { |
| 362 | dev_err(chip->dev, |
| 363 | "Invalid index(%d)\n", index); |
| 364 | return -EINVAL; |
| 365 | } |
James Ban | c90456e | 2015-12-08 10:57:29 +0900 | [diff] [blame] | 366 | |
| 367 | pv88090_regulator_info[i].desc.min_uV |
| 368 | = pv88090_buck_vol[index].min_uV; |
| 369 | pv88090_regulator_info[i].desc.uV_step |
| 370 | = pv88090_buck_vol[index].uV_step; |
| 371 | pv88090_regulator_info[i].desc.n_voltages |
| 372 | = ((pv88090_buck_vol[index].max_uV) |
| 373 | - (pv88090_buck_vol[index].min_uV)) |
| 374 | /(pv88090_buck_vol[index].uV_step) + 1; |
| 375 | } |
| 376 | |
| 377 | config.driver_data = (void *)&pv88090_regulator_info[i]; |
| 378 | chip->rdev[i] = devm_regulator_register(chip->dev, |
| 379 | &pv88090_regulator_info[i].desc, &config); |
| 380 | if (IS_ERR(chip->rdev[i])) { |
| 381 | dev_err(chip->dev, |
| 382 | "Failed to register PV88090 regulator\n"); |
| 383 | return PTR_ERR(chip->rdev[i]); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | return 0; |
| 388 | } |
| 389 | |
| 390 | static const struct i2c_device_id pv88090_i2c_id[] = { |
| 391 | {"pv88090", 0}, |
| 392 | {}, |
| 393 | }; |
| 394 | MODULE_DEVICE_TABLE(i2c, pv88090_i2c_id); |
| 395 | |
| 396 | #ifdef CONFIG_OF |
| 397 | static const struct of_device_id pv88090_dt_ids[] = { |
| 398 | { .compatible = "pvs,pv88090", .data = &pv88090_i2c_id[0] }, |
| 399 | {}, |
| 400 | }; |
| 401 | MODULE_DEVICE_TABLE(of, pv88090_dt_ids); |
| 402 | #endif |
| 403 | |
| 404 | static struct i2c_driver pv88090_regulator_driver = { |
| 405 | .driver = { |
| 406 | .name = "pv88090", |
| 407 | .of_match_table = of_match_ptr(pv88090_dt_ids), |
| 408 | }, |
| 409 | .probe = pv88090_i2c_probe, |
| 410 | .id_table = pv88090_i2c_id, |
| 411 | }; |
| 412 | |
| 413 | module_i2c_driver(pv88090_regulator_driver); |
| 414 | |
| 415 | MODULE_AUTHOR("James Ban <James.Ban.opensource@diasemi.com>"); |
| 416 | MODULE_DESCRIPTION("Regulator device driver for Powerventure PV88090"); |
| 417 | MODULE_LICENSE("GPL"); |