1 // SPDX-License-Identifier: GPL-2.0+ 2 // 3 // SLG51000 High PSRR, Multi-Output Regulators 4 // Copyright (C) 2019 Dialog Semiconductor 5 // 6 // Author: Eric Jeong <eric.jeong.opensource@diasemi.com> 7 8 #include <linux/err.h> 9 #include <linux/gpio/consumer.h> 10 #include <linux/i2c.h> 11 #include <linux/init.h> 12 #include <linux/interrupt.h> 13 #include <linux/irq.h> 14 #include <linux/module.h> 15 #include <linux/of.h> 16 #include <linux/regmap.h> 17 #include <linux/regulator/driver.h> 18 #include <linux/regulator/machine.h> 19 #include <linux/regulator/of_regulator.h> 20 #include "slg51000-regulator.h" 21 22 #define SLG51000_SCTL_EVT 7 23 #define SLG51000_MAX_EVT_REGISTER 8 24 #define SLG51000_LDOHP_LV_MIN 1200000 25 #define SLG51000_LDOHP_HV_MIN 2400000 26 27 enum slg51000_regulators { 28 SLG51000_REGULATOR_LDO1 = 0, 29 SLG51000_REGULATOR_LDO2, 30 SLG51000_REGULATOR_LDO3, 31 SLG51000_REGULATOR_LDO4, 32 SLG51000_REGULATOR_LDO5, 33 SLG51000_REGULATOR_LDO6, 34 SLG51000_REGULATOR_LDO7, 35 SLG51000_MAX_REGULATORS, 36 }; 37 38 struct slg51000 { 39 struct device *dev; 40 struct regmap *regmap; 41 struct regulator_desc *rdesc[SLG51000_MAX_REGULATORS]; 42 struct regulator_dev *rdev[SLG51000_MAX_REGULATORS]; 43 struct gpio_desc *cs_gpiod; 44 int chip_irq; 45 }; 46 47 struct slg51000_evt_sta { 48 unsigned int ereg; 49 unsigned int sreg; 50 }; 51 52 static const struct slg51000_evt_sta es_reg[SLG51000_MAX_EVT_REGISTER] = { 53 {SLG51000_LDO1_EVENT, SLG51000_LDO1_STATUS}, 54 {SLG51000_LDO2_EVENT, SLG51000_LDO2_STATUS}, 55 {SLG51000_LDO3_EVENT, SLG51000_LDO3_STATUS}, 56 {SLG51000_LDO4_EVENT, SLG51000_LDO4_STATUS}, 57 {SLG51000_LDO5_EVENT, SLG51000_LDO5_STATUS}, 58 {SLG51000_LDO6_EVENT, SLG51000_LDO6_STATUS}, 59 {SLG51000_LDO7_EVENT, SLG51000_LDO7_STATUS}, 60 {SLG51000_SYSCTL_EVENT, SLG51000_SYSCTL_STATUS}, 61 }; 62 63 static const struct regmap_range slg51000_writeable_ranges[] = { 64 regmap_reg_range(SLG51000_SYSCTL_MATRIX_CONF_A, 65 SLG51000_SYSCTL_MATRIX_CONF_A), 66 regmap_reg_range(SLG51000_LDO1_VSEL, SLG51000_LDO1_VSEL), 67 regmap_reg_range(SLG51000_LDO1_MINV, SLG51000_LDO1_MAXV), 68 regmap_reg_range(SLG51000_LDO1_IRQ_MASK, SLG51000_LDO1_IRQ_MASK), 69 regmap_reg_range(SLG51000_LDO2_VSEL, SLG51000_LDO2_VSEL), 70 regmap_reg_range(SLG51000_LDO2_MINV, SLG51000_LDO2_MAXV), 71 regmap_reg_range(SLG51000_LDO2_IRQ_MASK, SLG51000_LDO2_IRQ_MASK), 72 regmap_reg_range(SLG51000_LDO3_VSEL, SLG51000_LDO3_VSEL), 73 regmap_reg_range(SLG51000_LDO3_MINV, SLG51000_LDO3_MAXV), 74 regmap_reg_range(SLG51000_LDO3_IRQ_MASK, SLG51000_LDO3_IRQ_MASK), 75 regmap_reg_range(SLG51000_LDO4_VSEL, SLG51000_LDO4_VSEL), 76 regmap_reg_range(SLG51000_LDO4_MINV, SLG51000_LDO4_MAXV), 77 regmap_reg_range(SLG51000_LDO4_IRQ_MASK, SLG51000_LDO4_IRQ_MASK), 78 regmap_reg_range(SLG51000_LDO5_VSEL, SLG51000_LDO5_VSEL), 79 regmap_reg_range(SLG51000_LDO5_MINV, SLG51000_LDO5_MAXV), 80 regmap_reg_range(SLG51000_LDO5_IRQ_MASK, SLG51000_LDO5_IRQ_MASK), 81 regmap_reg_range(SLG51000_LDO6_VSEL, SLG51000_LDO6_VSEL), 82 regmap_reg_range(SLG51000_LDO6_MINV, SLG51000_LDO6_MAXV), 83 regmap_reg_range(SLG51000_LDO6_IRQ_MASK, SLG51000_LDO6_IRQ_MASK), 84 regmap_reg_range(SLG51000_LDO7_VSEL, SLG51000_LDO7_VSEL), 85 regmap_reg_range(SLG51000_LDO7_MINV, SLG51000_LDO7_MAXV), 86 regmap_reg_range(SLG51000_LDO7_IRQ_MASK, SLG51000_LDO7_IRQ_MASK), 87 regmap_reg_range(SLG51000_OTP_IRQ_MASK, SLG51000_OTP_IRQ_MASK), 88 }; 89 90 static const struct regmap_range slg51000_readable_ranges[] = { 91 regmap_reg_range(SLG51000_SYSCTL_PATN_ID_B0, 92 SLG51000_SYSCTL_PATN_ID_B2), 93 regmap_reg_range(SLG51000_SYSCTL_SYS_CONF_A, 94 SLG51000_SYSCTL_SYS_CONF_A), 95 regmap_reg_range(SLG51000_SYSCTL_SYS_CONF_D, 96 SLG51000_SYSCTL_MATRIX_CONF_B), 97 regmap_reg_range(SLG51000_SYSCTL_REFGEN_CONF_C, 98 SLG51000_SYSCTL_UVLO_CONF_A), 99 regmap_reg_range(SLG51000_SYSCTL_FAULT_LOG1, SLG51000_SYSCTL_IRQ_MASK), 100 regmap_reg_range(SLG51000_IO_GPIO1_CONF, SLG51000_IO_GPIO_STATUS), 101 regmap_reg_range(SLG51000_LUTARRAY_LUT_VAL_0, 102 SLG51000_LUTARRAY_LUT_VAL_11), 103 regmap_reg_range(SLG51000_MUXARRAY_INPUT_SEL_0, 104 SLG51000_MUXARRAY_INPUT_SEL_63), 105 regmap_reg_range(SLG51000_PWRSEQ_RESOURCE_EN_0, 106 SLG51000_PWRSEQ_INPUT_SENSE_CONF_B), 107 regmap_reg_range(SLG51000_LDO1_VSEL, SLG51000_LDO1_VSEL), 108 regmap_reg_range(SLG51000_LDO1_MINV, SLG51000_LDO1_MAXV), 109 regmap_reg_range(SLG51000_LDO1_MISC1, SLG51000_LDO1_VSEL_ACTUAL), 110 regmap_reg_range(SLG51000_LDO1_EVENT, SLG51000_LDO1_IRQ_MASK), 111 regmap_reg_range(SLG51000_LDO2_VSEL, SLG51000_LDO2_VSEL), 112 regmap_reg_range(SLG51000_LDO2_MINV, SLG51000_LDO2_MAXV), 113 regmap_reg_range(SLG51000_LDO2_MISC1, SLG51000_LDO2_VSEL_ACTUAL), 114 regmap_reg_range(SLG51000_LDO2_EVENT, SLG51000_LDO2_IRQ_MASK), 115 regmap_reg_range(SLG51000_LDO3_VSEL, SLG51000_LDO3_VSEL), 116 regmap_reg_range(SLG51000_LDO3_MINV, SLG51000_LDO3_MAXV), 117 regmap_reg_range(SLG51000_LDO3_CONF1, SLG51000_LDO3_VSEL_ACTUAL), 118 regmap_reg_range(SLG51000_LDO3_EVENT, SLG51000_LDO3_IRQ_MASK), 119 regmap_reg_range(SLG51000_LDO4_VSEL, SLG51000_LDO4_VSEL), 120 regmap_reg_range(SLG51000_LDO4_MINV, SLG51000_LDO4_MAXV), 121 regmap_reg_range(SLG51000_LDO4_CONF1, SLG51000_LDO4_VSEL_ACTUAL), 122 regmap_reg_range(SLG51000_LDO4_EVENT, SLG51000_LDO4_IRQ_MASK), 123 regmap_reg_range(SLG51000_LDO5_VSEL, SLG51000_LDO5_VSEL), 124 regmap_reg_range(SLG51000_LDO5_MINV, SLG51000_LDO5_MAXV), 125 regmap_reg_range(SLG51000_LDO5_TRIM2, SLG51000_LDO5_TRIM2), 126 regmap_reg_range(SLG51000_LDO5_CONF1, SLG51000_LDO5_VSEL_ACTUAL), 127 regmap_reg_range(SLG51000_LDO5_EVENT, SLG51000_LDO5_IRQ_MASK), 128 regmap_reg_range(SLG51000_LDO6_VSEL, SLG51000_LDO6_VSEL), 129 regmap_reg_range(SLG51000_LDO6_MINV, SLG51000_LDO6_MAXV), 130 regmap_reg_range(SLG51000_LDO6_TRIM2, SLG51000_LDO6_TRIM2), 131 regmap_reg_range(SLG51000_LDO6_CONF1, SLG51000_LDO6_VSEL_ACTUAL), 132 regmap_reg_range(SLG51000_LDO6_EVENT, SLG51000_LDO6_IRQ_MASK), 133 regmap_reg_range(SLG51000_LDO7_VSEL, SLG51000_LDO7_VSEL), 134 regmap_reg_range(SLG51000_LDO7_MINV, SLG51000_LDO7_MAXV), 135 regmap_reg_range(SLG51000_LDO7_CONF1, SLG51000_LDO7_VSEL_ACTUAL), 136 regmap_reg_range(SLG51000_LDO7_EVENT, SLG51000_LDO7_IRQ_MASK), 137 regmap_reg_range(SLG51000_OTP_EVENT, SLG51000_OTP_EVENT), 138 regmap_reg_range(SLG51000_OTP_IRQ_MASK, SLG51000_OTP_IRQ_MASK), 139 regmap_reg_range(SLG51000_OTP_LOCK_OTP_PROG, SLG51000_OTP_LOCK_CTRL), 140 regmap_reg_range(SLG51000_LOCK_GLOBAL_LOCK_CTRL1, 141 SLG51000_LOCK_GLOBAL_LOCK_CTRL1), 142 }; 143 144 static const struct regmap_range slg51000_volatile_ranges[] = { 145 regmap_reg_range(SLG51000_SYSCTL_FAULT_LOG1, SLG51000_SYSCTL_STATUS), 146 regmap_reg_range(SLG51000_IO_GPIO_STATUS, SLG51000_IO_GPIO_STATUS), 147 regmap_reg_range(SLG51000_LDO1_EVENT, SLG51000_LDO1_STATUS), 148 regmap_reg_range(SLG51000_LDO2_EVENT, SLG51000_LDO2_STATUS), 149 regmap_reg_range(SLG51000_LDO3_EVENT, SLG51000_LDO3_STATUS), 150 regmap_reg_range(SLG51000_LDO4_EVENT, SLG51000_LDO4_STATUS), 151 regmap_reg_range(SLG51000_LDO5_EVENT, SLG51000_LDO5_STATUS), 152 regmap_reg_range(SLG51000_LDO6_EVENT, SLG51000_LDO6_STATUS), 153 regmap_reg_range(SLG51000_LDO7_EVENT, SLG51000_LDO7_STATUS), 154 regmap_reg_range(SLG51000_OTP_EVENT, SLG51000_OTP_EVENT), 155 }; 156 157 static const struct regmap_access_table slg51000_writeable_table = { 158 .yes_ranges = slg51000_writeable_ranges, 159 .n_yes_ranges = ARRAY_SIZE(slg51000_writeable_ranges), 160 }; 161 162 static const struct regmap_access_table slg51000_readable_table = { 163 .yes_ranges = slg51000_readable_ranges, 164 .n_yes_ranges = ARRAY_SIZE(slg51000_readable_ranges), 165 }; 166 167 static const struct regmap_access_table slg51000_volatile_table = { 168 .yes_ranges = slg51000_volatile_ranges, 169 .n_yes_ranges = ARRAY_SIZE(slg51000_volatile_ranges), 170 }; 171 172 static const struct regmap_config slg51000_regmap_config = { 173 .reg_bits = 16, 174 .val_bits = 8, 175 .max_register = 0x8000, 176 .wr_table = &slg51000_writeable_table, 177 .rd_table = &slg51000_readable_table, 178 .volatile_table = &slg51000_volatile_table, 179 }; 180 181 static const struct regulator_ops slg51000_regl_ops = { 182 .enable = regulator_enable_regmap, 183 .disable = regulator_disable_regmap, 184 .is_enabled = regulator_is_enabled_regmap, 185 .list_voltage = regulator_list_voltage_linear, 186 .map_voltage = regulator_map_voltage_linear, 187 .get_voltage_sel = regulator_get_voltage_sel_regmap, 188 .set_voltage_sel = regulator_set_voltage_sel_regmap, 189 }; 190 191 static const struct regulator_ops slg51000_switch_ops = { 192 .enable = regulator_enable_regmap, 193 .disable = regulator_disable_regmap, 194 .is_enabled = regulator_is_enabled_regmap, 195 }; 196 197 static int slg51000_of_parse_cb(struct device_node *np, 198 const struct regulator_desc *desc, 199 struct regulator_config *config) 200 { 201 struct gpio_desc *ena_gpiod; 202 203 ena_gpiod = fwnode_gpiod_get_index(of_fwnode_handle(np), "enable", 0, 204 GPIOD_OUT_LOW | 205 GPIOD_FLAGS_BIT_NONEXCLUSIVE, 206 "gpio-en-ldo"); 207 if (!IS_ERR(ena_gpiod)) 208 config->ena_gpiod = ena_gpiod; 209 210 return 0; 211 } 212 213 #define SLG51000_REGL_DESC(_id, _name, _s_name, _min, _step) \ 214 [SLG51000_REGULATOR_##_id] = { \ 215 .name = #_name, \ 216 .supply_name = _s_name, \ 217 .id = SLG51000_REGULATOR_##_id, \ 218 .of_match = of_match_ptr(#_name), \ 219 .of_parse_cb = slg51000_of_parse_cb, \ 220 .ops = &slg51000_regl_ops, \ 221 .regulators_node = of_match_ptr("regulators"), \ 222 .n_voltages = 256, \ 223 .min_uV = _min, \ 224 .uV_step = _step, \ 225 .linear_min_sel = 0, \ 226 .vsel_mask = SLG51000_VSEL_MASK, \ 227 .vsel_reg = SLG51000_##_id##_VSEL, \ 228 .enable_reg = SLG51000_SYSCTL_MATRIX_CONF_A, \ 229 .enable_mask = BIT(SLG51000_REGULATOR_##_id), \ 230 .type = REGULATOR_VOLTAGE, \ 231 .owner = THIS_MODULE, \ 232 } 233 234 static struct regulator_desc regls_desc[SLG51000_MAX_REGULATORS] = { 235 SLG51000_REGL_DESC(LDO1, ldo1, NULL, 2400000, 5000), 236 SLG51000_REGL_DESC(LDO2, ldo2, NULL, 2400000, 5000), 237 SLG51000_REGL_DESC(LDO3, ldo3, "vin3", 1200000, 10000), 238 SLG51000_REGL_DESC(LDO4, ldo4, "vin4", 1200000, 10000), 239 SLG51000_REGL_DESC(LDO5, ldo5, "vin5", 400000, 5000), 240 SLG51000_REGL_DESC(LDO6, ldo6, "vin6", 400000, 5000), 241 SLG51000_REGL_DESC(LDO7, ldo7, "vin7", 1200000, 10000), 242 }; 243 244 static int slg51000_regulator_init(struct slg51000 *chip) 245 { 246 struct regulator_config config = { }; 247 struct regulator_desc *rdesc; 248 unsigned int reg, val; 249 u8 vsel_range[2]; 250 int id, ret = 0; 251 const unsigned int min_regs[SLG51000_MAX_REGULATORS] = { 252 SLG51000_LDO1_MINV, SLG51000_LDO2_MINV, SLG51000_LDO3_MINV, 253 SLG51000_LDO4_MINV, SLG51000_LDO5_MINV, SLG51000_LDO6_MINV, 254 SLG51000_LDO7_MINV, 255 }; 256 257 for (id = 0; id < SLG51000_MAX_REGULATORS; id++) { 258 chip->rdesc[id] = ®ls_desc[id]; 259 rdesc = chip->rdesc[id]; 260 config.regmap = chip->regmap; 261 config.dev = chip->dev; 262 config.driver_data = chip; 263 264 ret = regmap_bulk_read(chip->regmap, min_regs[id], 265 vsel_range, 2); 266 if (ret < 0) { 267 dev_err(chip->dev, 268 "Failed to read the MIN register\n"); 269 return ret; 270 } 271 272 switch (id) { 273 case SLG51000_REGULATOR_LDO1: 274 case SLG51000_REGULATOR_LDO2: 275 if (id == SLG51000_REGULATOR_LDO1) 276 reg = SLG51000_LDO1_MISC1; 277 else 278 reg = SLG51000_LDO2_MISC1; 279 280 ret = regmap_read(chip->regmap, reg, &val); 281 if (ret < 0) { 282 dev_err(chip->dev, 283 "Failed to read voltage range of ldo%d\n", 284 id + 1); 285 return ret; 286 } 287 288 rdesc->linear_min_sel = vsel_range[0]; 289 rdesc->n_voltages = vsel_range[1] + 1; 290 if (val & SLG51000_SEL_VRANGE_MASK) 291 rdesc->min_uV = SLG51000_LDOHP_HV_MIN 292 + (vsel_range[0] 293 * rdesc->uV_step); 294 else 295 rdesc->min_uV = SLG51000_LDOHP_LV_MIN 296 + (vsel_range[0] 297 * rdesc->uV_step); 298 break; 299 300 case SLG51000_REGULATOR_LDO5: 301 case SLG51000_REGULATOR_LDO6: 302 if (id == SLG51000_REGULATOR_LDO5) 303 reg = SLG51000_LDO5_TRIM2; 304 else 305 reg = SLG51000_LDO6_TRIM2; 306 307 ret = regmap_read(chip->regmap, reg, &val); 308 if (ret < 0) { 309 dev_err(chip->dev, 310 "Failed to read LDO mode register\n"); 311 return ret; 312 } 313 314 if (val & SLG51000_SEL_BYP_MODE_MASK) { 315 rdesc->ops = &slg51000_switch_ops; 316 rdesc->n_voltages = 0; 317 rdesc->min_uV = 0; 318 rdesc->uV_step = 0; 319 rdesc->linear_min_sel = 0; 320 break; 321 } 322 fallthrough; /* to the check below */ 323 324 default: 325 rdesc->linear_min_sel = vsel_range[0]; 326 rdesc->n_voltages = vsel_range[1] + 1; 327 rdesc->min_uV = rdesc->min_uV 328 + (vsel_range[0] * rdesc->uV_step); 329 break; 330 } 331 332 chip->rdev[id] = devm_regulator_register(chip->dev, rdesc, 333 &config); 334 if (IS_ERR(chip->rdev[id])) { 335 ret = PTR_ERR(chip->rdev[id]); 336 dev_err(chip->dev, 337 "Failed to register regulator(%s):%d\n", 338 chip->rdesc[id]->name, ret); 339 return ret; 340 } 341 } 342 343 return 0; 344 } 345 346 static irqreturn_t slg51000_irq_handler(int irq, void *data) 347 { 348 struct slg51000 *chip = data; 349 struct regmap *regmap = chip->regmap; 350 enum { R0 = 0, R1, R2, REG_MAX }; 351 u8 evt[SLG51000_MAX_EVT_REGISTER][REG_MAX]; 352 int ret, i, handled = IRQ_NONE; 353 unsigned int evt_otp, mask_otp; 354 355 /* Read event[R0], status[R1] and mask[R2] register */ 356 for (i = 0; i < SLG51000_MAX_EVT_REGISTER; i++) { 357 ret = regmap_bulk_read(regmap, es_reg[i].ereg, evt[i], REG_MAX); 358 if (ret < 0) { 359 dev_err(chip->dev, 360 "Failed to read event registers(%d)\n", ret); 361 return IRQ_NONE; 362 } 363 } 364 365 ret = regmap_read(regmap, SLG51000_OTP_EVENT, &evt_otp); 366 if (ret < 0) { 367 dev_err(chip->dev, 368 "Failed to read otp event registers(%d)\n", ret); 369 return IRQ_NONE; 370 } 371 372 ret = regmap_read(regmap, SLG51000_OTP_IRQ_MASK, &mask_otp); 373 if (ret < 0) { 374 dev_err(chip->dev, 375 "Failed to read otp mask register(%d)\n", ret); 376 return IRQ_NONE; 377 } 378 379 if ((evt_otp & SLG51000_EVT_CRC_MASK) && 380 !(mask_otp & SLG51000_IRQ_CRC_MASK)) { 381 dev_info(chip->dev, 382 "OTP has been read or OTP crc is not zero\n"); 383 handled = IRQ_HANDLED; 384 } 385 386 for (i = 0; i < SLG51000_MAX_REGULATORS; i++) { 387 if (!(evt[i][R2] & SLG51000_IRQ_ILIM_FLAG_MASK) && 388 (evt[i][R0] & SLG51000_EVT_ILIM_FLAG_MASK)) { 389 regulator_lock(chip->rdev[i]); 390 regulator_notifier_call_chain(chip->rdev[i], 391 REGULATOR_EVENT_OVER_CURRENT, NULL); 392 regulator_unlock(chip->rdev[i]); 393 394 if (evt[i][R1] & SLG51000_STA_ILIM_FLAG_MASK) 395 dev_warn(chip->dev, 396 "Over-current limit(ldo%d)\n", i + 1); 397 handled = IRQ_HANDLED; 398 } 399 } 400 401 if (!(evt[SLG51000_SCTL_EVT][R2] & SLG51000_IRQ_HIGH_TEMP_WARN_MASK) && 402 (evt[SLG51000_SCTL_EVT][R0] & SLG51000_EVT_HIGH_TEMP_WARN_MASK)) { 403 for (i = 0; i < SLG51000_MAX_REGULATORS; i++) { 404 if (!(evt[i][R1] & SLG51000_STA_ILIM_FLAG_MASK) && 405 (evt[i][R1] & SLG51000_STA_VOUT_OK_FLAG_MASK)) { 406 regulator_lock(chip->rdev[i]); 407 regulator_notifier_call_chain(chip->rdev[i], 408 REGULATOR_EVENT_OVER_TEMP, NULL); 409 regulator_unlock(chip->rdev[i]); 410 } 411 } 412 handled = IRQ_HANDLED; 413 if (evt[SLG51000_SCTL_EVT][R1] & 414 SLG51000_STA_HIGH_TEMP_WARN_MASK) 415 dev_warn(chip->dev, "High temperature warning!\n"); 416 } 417 418 return handled; 419 } 420 421 static void slg51000_clear_fault_log(struct slg51000 *chip) 422 { 423 unsigned int val = 0; 424 int ret = 0; 425 426 ret = regmap_read(chip->regmap, SLG51000_SYSCTL_FAULT_LOG1, &val); 427 if (ret < 0) { 428 dev_err(chip->dev, "Failed to read Fault log register\n"); 429 return; 430 } 431 432 if (val & SLG51000_FLT_OVER_TEMP_MASK) 433 dev_dbg(chip->dev, "Fault log: FLT_OVER_TEMP\n"); 434 if (val & SLG51000_FLT_POWER_SEQ_CRASH_REQ_MASK) 435 dev_dbg(chip->dev, "Fault log: FLT_POWER_SEQ_CRASH_REQ\n"); 436 if (val & SLG51000_FLT_RST_MASK) 437 dev_dbg(chip->dev, "Fault log: FLT_RST\n"); 438 if (val & SLG51000_FLT_POR_MASK) 439 dev_dbg(chip->dev, "Fault log: FLT_POR\n"); 440 } 441 442 static int slg51000_i2c_probe(struct i2c_client *client) 443 { 444 struct device *dev = &client->dev; 445 struct slg51000 *chip; 446 struct gpio_desc *cs_gpiod; 447 int error, ret; 448 449 chip = devm_kzalloc(dev, sizeof(struct slg51000), GFP_KERNEL); 450 if (!chip) 451 return -ENOMEM; 452 453 cs_gpiod = devm_gpiod_get_optional(dev, "dlg,cs", 454 GPIOD_OUT_HIGH | 455 GPIOD_FLAGS_BIT_NONEXCLUSIVE); 456 if (IS_ERR(cs_gpiod)) 457 return PTR_ERR(cs_gpiod); 458 459 if (cs_gpiod) { 460 dev_info(dev, "Found chip selector property\n"); 461 chip->cs_gpiod = cs_gpiod; 462 } 463 464 i2c_set_clientdata(client, chip); 465 chip->chip_irq = client->irq; 466 chip->dev = dev; 467 chip->regmap = devm_regmap_init_i2c(client, &slg51000_regmap_config); 468 if (IS_ERR(chip->regmap)) { 469 error = PTR_ERR(chip->regmap); 470 dev_err(dev, "Failed to allocate register map: %d\n", 471 error); 472 return error; 473 } 474 475 ret = slg51000_regulator_init(chip); 476 if (ret < 0) { 477 dev_err(chip->dev, "Failed to init regulator(%d)\n", ret); 478 return ret; 479 } 480 481 slg51000_clear_fault_log(chip); 482 483 if (chip->chip_irq) { 484 ret = devm_request_threaded_irq(dev, chip->chip_irq, NULL, 485 slg51000_irq_handler, 486 (IRQF_TRIGGER_HIGH | 487 IRQF_ONESHOT), 488 "slg51000-irq", chip); 489 if (ret != 0) { 490 dev_err(dev, "Failed to request IRQ: %d\n", 491 chip->chip_irq); 492 return ret; 493 } 494 } else { 495 dev_info(dev, "No IRQ configured\n"); 496 } 497 498 return ret; 499 } 500 501 static const struct i2c_device_id slg51000_i2c_id[] = { 502 {"slg51000", 0}, 503 {}, 504 }; 505 MODULE_DEVICE_TABLE(i2c, slg51000_i2c_id); 506 507 static struct i2c_driver slg51000_regulator_driver = { 508 .driver = { 509 .name = "slg51000-regulator", 510 }, 511 .probe_new = slg51000_i2c_probe, 512 .id_table = slg51000_i2c_id, 513 }; 514 515 module_i2c_driver(slg51000_regulator_driver); 516 517 MODULE_AUTHOR("Eric Jeong <eric.jeong.opensource@diasemi.com>"); 518 MODULE_DESCRIPTION("SLG51000 regulator driver"); 519 MODULE_LICENSE("GPL"); 520 521