1// SPDX-License-Identifier: GPL-2.0+ 2 3#include <linux/bits.h> 4#include <linux/kernel.h> 5#include <linux/module.h> 6#include <linux/of.h> 7#include <linux/platform_device.h> 8#include <linux/regmap.h> 9#include <linux/regulator/driver.h> 10#include <linux/regulator/machine.h> 11#include <linux/regulator/of_regulator.h> 12 13#define RT5120_REG_PGSTAT 0x03 14#define RT5120_REG_CH1VID 0x06 15#define RT5120_REG_CH1SLPVID 0x07 16#define RT5120_REG_ENABLE 0x08 17#define RT5120_REG_MODECTL 0x09 18#define RT5120_REG_UVOVPROT 0x0A 19#define RT5120_REG_SLPCTL 0x0C 20#define RT5120_REG_INTSTAT 0x1E 21#define RT5120_REG_DISCHG 0x1F 22 23#define RT5120_OUTPG_MASK(rid) BIT(rid + 1) 24#define RT5120_OUTUV_MASK(rid) BIT(rid + 9) 25#define RT5120_OUTOV_MASK(rid) BIT(rid + 16) 26#define RT5120_CH1VID_MASK GENMASK(6, 0) 27#define RT5120_RIDEN_MASK(rid) BIT(rid + 1) 28#define RT5120_RADEN_MASK(rid) BIT(rid) 29#define RT5120_FPWM_MASK(rid) BIT(rid + 1) 30#define RT5120_UVHICCUP_MASK BIT(1) 31#define RT5120_OVHICCUP_MASK BIT(0) 32#define RT5120_HOTDIE_MASK BIT(1) 33 34#define RT5120_BUCK1_MINUV 600000 35#define RT5120_BUCK1_MAXUV 1393750 36#define RT5120_BUCK1_STEPUV 6250 37#define RT5120_BUCK1_NUM_VOLT 0x80 38 39#define RT5120_AUTO_MODE 0 40#define RT5120_FPWM_MODE 1 41 42enum { 43 RT5120_REGULATOR_BUCK1 = 0, 44 RT5120_REGULATOR_BUCK2, 45 RT5120_REGULATOR_BUCK3, 46 RT5120_REGULATOR_BUCK4, 47 RT5120_REGULATOR_LDO, 48 RT5120_REGULATOR_EXTEN, 49 RT5120_MAX_REGULATOR 50}; 51 52struct rt5120_priv { 53 struct device *dev; 54 struct regmap *regmap; 55 struct regulator_desc rdesc[RT5120_MAX_REGULATOR]; 56}; 57 58static int rt5120_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) 59{ 60 struct regmap *regmap = rdev_get_regmap(rdev); 61 int rid = rdev_get_id(rdev); 62 unsigned int mask = RT5120_FPWM_MASK(rid), val; 63 64 switch (mode) { 65 case REGULATOR_MODE_NORMAL: 66 val = 0; 67 break; 68 case REGULATOR_MODE_FAST: 69 val = RT5120_FPWM_MASK(rid); 70 break; 71 default: 72 return -EINVAL; 73 } 74 75 return regmap_update_bits(regmap, RT5120_REG_MODECTL, mask, val); 76} 77 78static unsigned int rt5120_buck_get_mode(struct regulator_dev *rdev) 79{ 80 struct regmap *regmap = rdev_get_regmap(rdev); 81 int ret, rid = rdev_get_id(rdev); 82 unsigned int val; 83 84 ret = regmap_read(regmap, RT5120_REG_MODECTL, &val); 85 if (ret) 86 return REGULATOR_MODE_INVALID; 87 88 if (val & RT5120_FPWM_MASK(rid)) 89 return REGULATOR_MODE_FAST; 90 91 return REGULATOR_MODE_NORMAL; 92} 93 94static int rt5120_regulator_get_error_flags(struct regulator_dev *rdev, 95 unsigned int *flags) 96{ 97 struct regmap *regmap = rdev_get_regmap(rdev); 98 unsigned int stat, hd_stat, cur_flags = 0; 99 int rid = rdev_get_id(rdev), ret; 100 101 /* 102 * reg 0x03/0x04/0x05 to indicate PG/UV/OV 103 * use block read to descrease I/O xfer time 104 */ 105 ret = regmap_raw_read(regmap, RT5120_REG_PGSTAT, &stat, 3); 106 if (ret) 107 return ret; 108 109 ret = regmap_read(regmap, RT5120_REG_INTSTAT, &hd_stat); 110 if (ret) 111 return ret; 112 113 if (!(stat & RT5120_OUTPG_MASK(rid))) { 114 if (stat & RT5120_OUTUV_MASK(rid)) 115 cur_flags |= REGULATOR_ERROR_UNDER_VOLTAGE; 116 117 if (stat & RT5120_OUTOV_MASK(rid)) 118 cur_flags |= REGULATOR_ERROR_REGULATION_OUT; 119 } 120 121 if (hd_stat & RT5120_HOTDIE_MASK) 122 cur_flags |= REGULATOR_ERROR_OVER_TEMP; 123 124 *flags = cur_flags; 125 return 0; 126} 127 128static int rt5120_buck1_set_suspend_voltage(struct regulator_dev *rdev, int uV) 129{ 130 struct regmap *regmap = rdev_get_regmap(rdev); 131 int sel; 132 133 if (uV < RT5120_BUCK1_MINUV || uV > RT5120_BUCK1_MAXUV) 134 return -EINVAL; 135 136 sel = (uV - RT5120_BUCK1_MINUV) / RT5120_BUCK1_STEPUV; 137 return regmap_write(regmap, RT5120_REG_CH1SLPVID, sel); 138} 139 140static int rt5120_regulator_set_suspend_enable(struct regulator_dev *rdev) 141{ 142 struct regmap *regmap = rdev_get_regmap(rdev); 143 int rid = rdev_get_id(rdev); 144 unsigned int mask = RT5120_RIDEN_MASK(rid); 145 146 return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, mask); 147} 148 149static int rt5120_regulator_set_suspend_disable(struct regulator_dev *rdev) 150{ 151 struct regmap *regmap = rdev_get_regmap(rdev); 152 int rid = rdev_get_id(rdev); 153 unsigned int mask = RT5120_RIDEN_MASK(rid); 154 155 return regmap_update_bits(regmap, RT5120_REG_SLPCTL, mask, 0); 156} 157 158static const struct regulator_ops rt5120_buck1_ops = { 159 .enable = regulator_enable_regmap, 160 .disable = regulator_disable_regmap, 161 .is_enabled = regulator_is_enabled_regmap, 162 .list_voltage = regulator_list_voltage_linear, 163 .set_voltage_sel = regulator_set_voltage_sel_regmap, 164 .get_voltage_sel = regulator_get_voltage_sel_regmap, 165 .set_active_discharge = regulator_set_active_discharge_regmap, 166 .set_mode = rt5120_buck_set_mode, 167 .get_mode = rt5120_buck_get_mode, 168 .get_error_flags = rt5120_regulator_get_error_flags, 169 .set_suspend_voltage = rt5120_buck1_set_suspend_voltage, 170 .set_suspend_enable = rt5120_regulator_set_suspend_enable, 171 .set_suspend_disable = rt5120_regulator_set_suspend_disable, 172}; 173 174static const struct regulator_ops rt5120_buck234_ops = { 175 .enable = regulator_enable_regmap, 176 .disable = regulator_disable_regmap, 177 .is_enabled = regulator_is_enabled_regmap, 178 .set_active_discharge = regulator_set_active_discharge_regmap, 179 .set_mode = rt5120_buck_set_mode, 180 .get_mode = rt5120_buck_get_mode, 181 .get_error_flags = rt5120_regulator_get_error_flags, 182 .set_suspend_enable = rt5120_regulator_set_suspend_enable, 183 .set_suspend_disable = rt5120_regulator_set_suspend_disable, 184}; 185 186static const struct regulator_ops rt5120_ldo_ops = { 187 .enable = regulator_enable_regmap, 188 .disable = regulator_disable_regmap, 189 .is_enabled = regulator_is_enabled_regmap, 190 .set_active_discharge = regulator_set_active_discharge_regmap, 191 .get_error_flags = rt5120_regulator_get_error_flags, 192 .set_suspend_enable = rt5120_regulator_set_suspend_enable, 193 .set_suspend_disable = rt5120_regulator_set_suspend_disable, 194}; 195 196static const struct regulator_ops rt5120_exten_ops = { 197 .enable = regulator_enable_regmap, 198 .disable = regulator_disable_regmap, 199 .is_enabled = regulator_is_enabled_regmap, 200 .set_suspend_enable = rt5120_regulator_set_suspend_enable, 201 .set_suspend_disable = rt5120_regulator_set_suspend_disable, 202}; 203 204static unsigned int rt5120_buck_of_map_mode(unsigned int mode) 205{ 206 switch (mode) { 207 case RT5120_AUTO_MODE: 208 return REGULATOR_MODE_NORMAL; 209 case RT5120_FPWM_MODE: 210 return REGULATOR_MODE_FAST; 211 default: 212 return REGULATOR_MODE_INVALID; 213 } 214} 215 216static void rt5120_fillin_regulator_desc(struct regulator_desc *desc, int rid) 217{ 218 static const char * const name[] = { 219 "buck1", "buck2", "buck3", "buck4", "ldo", "exten" }; 220 static const char * const sname[] = { 221 "vin1", "vin2", "vin3", "vin4", "vinldo", NULL }; 222 223 /* Common regulator property */ 224 desc->name = name[rid]; 225 desc->supply_name = sname[rid]; 226 desc->owner = THIS_MODULE; 227 desc->type = REGULATOR_VOLTAGE; 228 desc->id = rid; 229 desc->enable_reg = RT5120_REG_ENABLE; 230 desc->enable_mask = RT5120_RIDEN_MASK(rid); 231 desc->active_discharge_reg = RT5120_REG_DISCHG; 232 desc->active_discharge_mask = RT5120_RADEN_MASK(rid); 233 desc->active_discharge_on = RT5120_RADEN_MASK(rid); 234 /* Config n_voltages to 1 for all*/ 235 desc->n_voltages = 1; 236 237 /* Only buck support mode change */ 238 if (rid >= RT5120_REGULATOR_BUCK1 && rid <= RT5120_REGULATOR_BUCK4) 239 desc->of_map_mode = rt5120_buck_of_map_mode; 240 241 /* RID specific property init */ 242 switch (rid) { 243 case RT5120_REGULATOR_BUCK1: 244 /* Only buck1 support voltage change by I2C */ 245 desc->n_voltages = RT5120_BUCK1_NUM_VOLT; 246 desc->min_uV = RT5120_BUCK1_MINUV; 247 desc->uV_step = RT5120_BUCK1_STEPUV; 248 desc->vsel_reg = RT5120_REG_CH1VID, 249 desc->vsel_mask = RT5120_CH1VID_MASK, 250 desc->ops = &rt5120_buck1_ops; 251 break; 252 case RT5120_REGULATOR_BUCK2 ... RT5120_REGULATOR_BUCK4: 253 desc->ops = &rt5120_buck234_ops; 254 break; 255 case RT5120_REGULATOR_LDO: 256 desc->ops = &rt5120_ldo_ops; 257 break; 258 default: 259 desc->ops = &rt5120_exten_ops; 260 } 261} 262 263static int rt5120_of_parse_cb(struct rt5120_priv *priv, int rid, 264 struct of_regulator_match *match) 265{ 266 struct regulator_desc *desc = priv->rdesc + rid; 267 struct regulator_init_data *init_data = match->init_data; 268 269 if (!init_data || rid == RT5120_REGULATOR_BUCK1) 270 return 0; 271 272 if (init_data->constraints.min_uV != init_data->constraints.max_uV) { 273 dev_err(priv->dev, "Variable voltage for fixed regulator\n"); 274 return -EINVAL; 275 } 276 277 desc->fixed_uV = init_data->constraints.min_uV; 278 return 0; 279} 280 281static struct of_regulator_match rt5120_regu_match[RT5120_MAX_REGULATOR] = { 282 [RT5120_REGULATOR_BUCK1] = { .name = "buck1", }, 283 [RT5120_REGULATOR_BUCK2] = { .name = "buck2", }, 284 [RT5120_REGULATOR_BUCK3] = { .name = "buck3", }, 285 [RT5120_REGULATOR_BUCK4] = { .name = "buck4", }, 286 [RT5120_REGULATOR_LDO] = { .name = "ldo", }, 287 [RT5120_REGULATOR_EXTEN] = { .name = "exten", } 288}; 289 290static int rt5120_parse_regulator_dt_data(struct rt5120_priv *priv) 291{ 292 struct device *dev = priv->dev->parent; 293 struct device_node *reg_node; 294 int i, ret; 295 296 for (i = 0; i < RT5120_MAX_REGULATOR; i++) { 297 rt5120_fillin_regulator_desc(priv->rdesc + i, i); 298 299 rt5120_regu_match[i].desc = priv->rdesc + i; 300 } 301 302 reg_node = of_get_child_by_name(dev->of_node, "regulators"); 303 if (!reg_node) { 304 dev_err(priv->dev, "Couldn't find 'regulators' node\n"); 305 return -ENODEV; 306 } 307 308 ret = of_regulator_match(priv->dev, reg_node, rt5120_regu_match, 309 ARRAY_SIZE(rt5120_regu_match)); 310 311 of_node_put(reg_node); 312 313 if (ret < 0) { 314 dev_err(priv->dev, 315 "Error parsing regulator init data (%d)\n", ret); 316 return ret; 317 } 318 319 for (i = 0; i < RT5120_MAX_REGULATOR; i++) { 320 ret = rt5120_of_parse_cb(priv, i, rt5120_regu_match + i); 321 if (ret) { 322 dev_err(priv->dev, "Failed in [%d] of_passe_cb\n", i); 323 return ret; 324 } 325 } 326 327 return 0; 328} 329 330static int rt5120_device_property_init(struct rt5120_priv *priv) 331{ 332 struct device *dev = priv->dev->parent; 333 struct device_node *np = dev->of_node; 334 bool prot_enable; 335 unsigned int prot_enable_val = 0; 336 337 /* Assign UV/OV HW protection behavior */ 338 prot_enable = of_property_read_bool(np, 339 "richtek,enable-undervolt-hiccup"); 340 if (prot_enable) 341 prot_enable_val |= RT5120_UVHICCUP_MASK; 342 343 prot_enable = of_property_read_bool(np, 344 "richtek,enable-overvolt-hiccup"); 345 if (prot_enable) 346 prot_enable_val |= RT5120_OVHICCUP_MASK; 347 348 return regmap_update_bits(priv->regmap, RT5120_REG_UVOVPROT, 349 RT5120_UVHICCUP_MASK | RT5120_OVHICCUP_MASK, 350 prot_enable_val); 351} 352 353static int rt5120_regulator_probe(struct platform_device *pdev) 354{ 355 struct rt5120_priv *priv; 356 struct regulator_dev *rdev; 357 struct regulator_config config = {}; 358 int i, ret; 359 360 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL); 361 if (!priv) 362 return -ENOMEM; 363 364 priv->dev = &pdev->dev; 365 366 priv->regmap = dev_get_regmap(pdev->dev.parent, NULL); 367 if (!priv->regmap) { 368 dev_err(&pdev->dev, "Failed to init regmap\n"); 369 return -ENODEV; 370 } 371 372 ret = rt5120_device_property_init(priv); 373 if (ret) { 374 dev_err(&pdev->dev, "Failed to do property init\n"); 375 return ret; 376 } 377 378 ret = rt5120_parse_regulator_dt_data(priv); 379 if (ret) { 380 dev_err(&pdev->dev, "Failed to parse dt data\n"); 381 return ret; 382 } 383 384 config.dev = &pdev->dev; 385 config.regmap = priv->regmap; 386 387 for (i = 0; i < RT5120_MAX_REGULATOR; i++) { 388 config.of_node = rt5120_regu_match[i].of_node; 389 config.init_data = rt5120_regu_match[i].init_data; 390 391 rdev = devm_regulator_register(&pdev->dev, priv->rdesc + i, 392 &config); 393 if (IS_ERR(rdev)) { 394 dev_err(&pdev->dev, 395 "Failed to register regulator [%d]\n", i); 396 return PTR_ERR(rdev); 397 } 398 } 399 400 return 0; 401} 402 403static const struct platform_device_id rt5120_regulator_dev_table[] = { 404 { "rt5120-regulator", 0 }, 405 {} 406}; 407MODULE_DEVICE_TABLE(platform, rt5120_regulator_dev_table); 408 409static struct platform_driver rt5120_regulator_driver = { 410 .driver = { 411 .name = "rt5120-regulator", 412 .probe_type = PROBE_PREFER_ASYNCHRONOUS, 413 }, 414 .id_table = rt5120_regulator_dev_table, 415 .probe = rt5120_regulator_probe, 416}; 417module_platform_driver(rt5120_regulator_driver); 418 419MODULE_AUTHOR("ChiYuan Huang <cy_huang@richtek.com>"); 420MODULE_DESCRIPTION("Richtek RT5120 regulator driver"); 421MODULE_LICENSE("GPL v2"); 422