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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 | // SPDX-License-Identifier: GPL-2.0 /* * ROHM BD9571MWV-M and BD9574MWF-M regulator driver * * Copyright (C) 2017 Marek Vasut <marek.vasut+renesas@gmail.com> * * Based on the TPS65086 driver * * NOTE: VD09 is missing */ #include <linux/mfd/rohm-generic.h> #include <linux/module.h> #include <linux/of.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/mfd/bd9571mwv.h> struct bd9571mwv_reg { struct regmap *regmap; /* DDR Backup Power */ u8 bkup_mode_cnt_keepon; /* from "rohm,ddr-backup-power" */ u8 bkup_mode_cnt_saved; bool bkup_mode_enabled; /* Power switch type */ bool rstbmode_level; bool rstbmode_pulse; }; enum bd9571mwv_regulators { VD09, VD18, VD25, VD33, DVFS }; #define BD9571MWV_REG(_name, _of, _id, _ops, _vr, _vm, _nv, _min, _step, _lmin)\ { \ .name = _name, \ .of_match = of_match_ptr(_of), \ .regulators_node = "regulators", \ .id = _id, \ .ops = &_ops, \ .n_voltages = _nv, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = _vr, \ .vsel_mask = _vm, \ .min_uV = _min, \ .uV_step = _step, \ .linear_min_sel = _lmin, \ } static int bd9571mwv_avs_get_moni_state(struct regulator_dev *rdev) { unsigned int val; int ret; ret = regmap_read(rdev->regmap, BD9571MWV_AVS_SET_MONI, &val); if (ret != 0) return ret; return val & BD9571MWV_AVS_SET_MONI_MASK; } static int bd9571mwv_avs_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned int sel) { int ret; ret = bd9571mwv_avs_get_moni_state(rdev); if (ret < 0) return ret; return regmap_write_bits(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), rdev->desc->vsel_mask, sel); } static int bd9571mwv_avs_get_voltage_sel_regmap(struct regulator_dev *rdev) { unsigned int val; int ret; ret = bd9571mwv_avs_get_moni_state(rdev); if (ret < 0) return ret; ret = regmap_read(rdev->regmap, BD9571MWV_AVS_VD09_VID(ret), &val); if (ret != 0) return ret; val &= rdev->desc->vsel_mask; val >>= ffs(rdev->desc->vsel_mask) - 1; return val; } static int bd9571mwv_reg_set_voltage_sel_regmap(struct regulator_dev *rdev, unsigned int sel) { return regmap_write_bits(rdev->regmap, BD9571MWV_DVFS_SETVID, rdev->desc->vsel_mask, sel); } /* Operations permitted on AVS voltage regulator */ static const struct regulator_ops avs_ops = { .set_voltage_sel = bd9571mwv_avs_set_voltage_sel_regmap, .map_voltage = regulator_map_voltage_linear, .get_voltage_sel = bd9571mwv_avs_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, }; /* Operations permitted on voltage regulators */ static const struct regulator_ops reg_ops = { .set_voltage_sel = bd9571mwv_reg_set_voltage_sel_regmap, .map_voltage = regulator_map_voltage_linear, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, }; /* Operations permitted on voltage monitors */ static const struct regulator_ops vid_ops = { .map_voltage = regulator_map_voltage_linear, .get_voltage_sel = regulator_get_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, }; static const struct regulator_desc regulators[] = { BD9571MWV_REG("VD09", "vd09", VD09, avs_ops, 0, 0x7f, 0x6f, 600000, 10000, 0x3c), BD9571MWV_REG("VD18", "vd18", VD18, vid_ops, BD9571MWV_VD18_VID, 0xf, 16, 1625000, 25000, 0), BD9571MWV_REG("VD25", "vd25", VD25, vid_ops, BD9571MWV_VD25_VID, 0xf, 16, 2150000, 50000, 0), BD9571MWV_REG("VD33", "vd33", VD33, vid_ops, BD9571MWV_VD33_VID, 0xf, 11, 2800000, 100000, 0), BD9571MWV_REG("DVFS", "dvfs", DVFS, reg_ops, BD9571MWV_DVFS_MONIVDAC, 0x7f, 0x6f, 600000, 10000, 0x3c), }; #ifdef CONFIG_PM_SLEEP static int bd9571mwv_bkup_mode_read(struct bd9571mwv_reg *bdreg, unsigned int *mode) { int ret; ret = regmap_read(bdreg->regmap, BD9571MWV_BKUP_MODE_CNT, mode); if (ret) { dev_err(regmap_get_device(bdreg->regmap), "failed to read backup mode (%d)\n", ret); return ret; } return 0; } static int bd9571mwv_bkup_mode_write(struct bd9571mwv_reg *bdreg, unsigned int mode) { int ret; ret = regmap_write(bdreg->regmap, BD9571MWV_BKUP_MODE_CNT, mode); if (ret) { dev_err(regmap_get_device(bdreg->regmap), "failed to configure backup mode 0x%x (%d)\n", mode, ret); return ret; } return 0; } static ssize_t backup_mode_show(struct device *dev, struct device_attribute *attr, char *buf) { struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev); return sysfs_emit(buf, "%s\n", bdreg->bkup_mode_enabled ? "on" : "off"); } static ssize_t backup_mode_store(struct device *dev, struct device_attribute *attr, const char *buf, size_t count) { struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev); unsigned int mode; int ret; if (!count) return 0; ret = kstrtobool(buf, &bdreg->bkup_mode_enabled); if (ret) return ret; if (!bdreg->rstbmode_level) return count; /* * Configure DDR Backup Mode, to change the role of the accessory power * switch from a power switch to a wake-up switch, or vice versa */ ret = bd9571mwv_bkup_mode_read(bdreg, &mode); if (ret) return ret; mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK; if (bdreg->bkup_mode_enabled) mode |= bdreg->bkup_mode_cnt_keepon; ret = bd9571mwv_bkup_mode_write(bdreg, mode); if (ret) return ret; return count; } static DEVICE_ATTR_RW(backup_mode); static int bd9571mwv_suspend(struct device *dev) { struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev); unsigned int mode; int ret; if (!bdreg->bkup_mode_enabled) return 0; /* Save DDR Backup Mode */ ret = bd9571mwv_bkup_mode_read(bdreg, &mode); if (ret) return ret; bdreg->bkup_mode_cnt_saved = mode; if (!bdreg->rstbmode_pulse) return 0; /* Enable DDR Backup Mode */ mode &= ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK; mode |= bdreg->bkup_mode_cnt_keepon; if (mode != bdreg->bkup_mode_cnt_saved) return bd9571mwv_bkup_mode_write(bdreg, mode); return 0; } static int bd9571mwv_resume(struct device *dev) { struct bd9571mwv_reg *bdreg = dev_get_drvdata(dev); if (!bdreg->bkup_mode_enabled) return 0; /* Restore DDR Backup Mode */ return bd9571mwv_bkup_mode_write(bdreg, bdreg->bkup_mode_cnt_saved); } static const struct dev_pm_ops bd9571mwv_pm = { SET_SYSTEM_SLEEP_PM_OPS(bd9571mwv_suspend, bd9571mwv_resume) }; static int bd9571mwv_regulator_remove(struct platform_device *pdev) { device_remove_file(&pdev->dev, &dev_attr_backup_mode); return 0; } #define DEV_PM_OPS &bd9571mwv_pm #else #define DEV_PM_OPS NULL #define bd9571mwv_regulator_remove NULL #endif /* CONFIG_PM_SLEEP */ static int bd9571mwv_regulator_probe(struct platform_device *pdev) { struct regulator_config config = { }; struct bd9571mwv_reg *bdreg; struct regulator_dev *rdev; unsigned int val; int i; enum rohm_chip_type chip = platform_get_device_id(pdev)->driver_data; bdreg = devm_kzalloc(&pdev->dev, sizeof(*bdreg), GFP_KERNEL); if (!bdreg) return -ENOMEM; bdreg->regmap = dev_get_regmap(pdev->dev.parent, NULL); platform_set_drvdata(pdev, bdreg); config.dev = &pdev->dev; config.dev->of_node = pdev->dev.parent->of_node; config.driver_data = bdreg; config.regmap = bdreg->regmap; for (i = 0; i < ARRAY_SIZE(regulators); i++) { /* BD9574MWF supports DVFS only */ if (chip == ROHM_CHIP_TYPE_BD9574 && regulators[i].id != DVFS) continue; rdev = devm_regulator_register(&pdev->dev, ®ulators[i], &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s regulator\n", regulators[i].name); return PTR_ERR(rdev); } } val = 0; of_property_read_u32(config.dev->of_node, "rohm,ddr-backup-power", &val); if (val & ~BD9571MWV_BKUP_MODE_CNT_KEEPON_MASK) { dev_err(&pdev->dev, "invalid %s mode %u\n", "rohm,ddr-backup-power", val); return -EINVAL; } bdreg->bkup_mode_cnt_keepon = val; bdreg->rstbmode_level = of_property_read_bool(config.dev->of_node, "rohm,rstbmode-level"); bdreg->rstbmode_pulse = of_property_read_bool(config.dev->of_node, "rohm,rstbmode-pulse"); if (bdreg->rstbmode_level && bdreg->rstbmode_pulse) { dev_err(&pdev->dev, "only one rohm,rstbmode-* may be specified"); return -EINVAL; } #ifdef CONFIG_PM_SLEEP if (bdreg->bkup_mode_cnt_keepon) { int ret; /* * Backup mode is enabled by default in pulse mode, but needs * explicit user setup in level mode. */ bdreg->bkup_mode_enabled = bdreg->rstbmode_pulse; ret = device_create_file(&pdev->dev, &dev_attr_backup_mode); if (ret) return ret; } #endif /* CONFIG_PM_SLEEP */ return 0; } static const struct platform_device_id bd9571mwv_regulator_id_table[] = { { "bd9571mwv-regulator", ROHM_CHIP_TYPE_BD9571 }, { "bd9574mwf-regulator", ROHM_CHIP_TYPE_BD9574 }, { /* sentinel */ } }; MODULE_DEVICE_TABLE(platform, bd9571mwv_regulator_id_table); static struct platform_driver bd9571mwv_regulator_driver = { .driver = { .name = "bd9571mwv-regulator", .pm = DEV_PM_OPS, }, .probe = bd9571mwv_regulator_probe, .remove = bd9571mwv_regulator_remove, .id_table = bd9571mwv_regulator_id_table, }; module_platform_driver(bd9571mwv_regulator_driver); MODULE_AUTHOR("Marek Vasut <marek.vasut+renesas@gmail.com>"); MODULE_DESCRIPTION("BD9571MWV Regulator driver"); MODULE_LICENSE("GPL v2"); |