1 /* 2 * max77693.c - mfd core driver for the MAX 77693 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * SangYoung Son <hello.son@smasung.com> 6 * 7 * This program is not provided / owned by Maxim Integrated Products. 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License as published by 11 * the Free Software Foundation; either version 2 of the License, or 12 * (at your option) any later version. 13 * 14 * This program is distributed in the hope that it will be useful, 15 * but WITHOUT ANY WARRANTY; without even the implied warranty of 16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 17 * GNU General Public License for more details. 18 * 19 * You should have received a copy of the GNU General Public License 20 * along with this program; if not, write to the Free Software 21 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 22 * 23 * This driver is based on max8997.c 24 */ 25 26 #include <linux/module.h> 27 #include <linux/slab.h> 28 #include <linux/i2c.h> 29 #include <linux/err.h> 30 #include <linux/interrupt.h> 31 #include <linux/of.h> 32 #include <linux/pm_runtime.h> 33 #include <linux/mutex.h> 34 #include <linux/mfd/core.h> 35 #include <linux/mfd/max77693.h> 36 #include <linux/mfd/max77693-common.h> 37 #include <linux/mfd/max77693-private.h> 38 #include <linux/regulator/machine.h> 39 #include <linux/regmap.h> 40 41 #define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */ 42 #define I2C_ADDR_MUIC (0x4A >> 1) 43 #define I2C_ADDR_HAPTIC (0x90 >> 1) 44 45 static const struct mfd_cell max77693_devs[] = { 46 { .name = "max77693-pmic", }, 47 { 48 .name = "max77693-charger", 49 .of_compatible = "maxim,max77693-charger", 50 }, 51 { .name = "max77693-muic", }, 52 { 53 .name = "max77693-haptic", 54 .of_compatible = "maxim,max77693-haptic", 55 }, 56 { 57 .name = "max77693-led", 58 .of_compatible = "maxim,max77693-led", 59 }, 60 }; 61 62 static const struct regmap_config max77693_regmap_config = { 63 .reg_bits = 8, 64 .val_bits = 8, 65 .max_register = MAX77693_PMIC_REG_END, 66 }; 67 68 static const struct regmap_irq max77693_led_irqs[] = { 69 { .mask = LED_IRQ_FLED2_OPEN, }, 70 { .mask = LED_IRQ_FLED2_SHORT, }, 71 { .mask = LED_IRQ_FLED1_OPEN, }, 72 { .mask = LED_IRQ_FLED1_SHORT, }, 73 { .mask = LED_IRQ_MAX_FLASH, }, 74 }; 75 76 static const struct regmap_irq_chip max77693_led_irq_chip = { 77 .name = "max77693-led", 78 .status_base = MAX77693_LED_REG_FLASH_INT, 79 .mask_base = MAX77693_LED_REG_FLASH_INT_MASK, 80 .mask_invert = false, 81 .num_regs = 1, 82 .irqs = max77693_led_irqs, 83 .num_irqs = ARRAY_SIZE(max77693_led_irqs), 84 }; 85 86 static const struct regmap_irq max77693_topsys_irqs[] = { 87 { .mask = TOPSYS_IRQ_T120C_INT, }, 88 { .mask = TOPSYS_IRQ_T140C_INT, }, 89 { .mask = TOPSYS_IRQ_LOWSYS_INT, }, 90 }; 91 92 static const struct regmap_irq_chip max77693_topsys_irq_chip = { 93 .name = "max77693-topsys", 94 .status_base = MAX77693_PMIC_REG_TOPSYS_INT, 95 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK, 96 .mask_invert = false, 97 .num_regs = 1, 98 .irqs = max77693_topsys_irqs, 99 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs), 100 }; 101 102 static const struct regmap_irq max77693_charger_irqs[] = { 103 { .mask = CHG_IRQ_BYP_I, }, 104 { .mask = CHG_IRQ_THM_I, }, 105 { .mask = CHG_IRQ_BAT_I, }, 106 { .mask = CHG_IRQ_CHG_I, }, 107 { .mask = CHG_IRQ_CHGIN_I, }, 108 }; 109 110 static const struct regmap_irq_chip max77693_charger_irq_chip = { 111 .name = "max77693-charger", 112 .status_base = MAX77693_CHG_REG_CHG_INT, 113 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK, 114 .mask_invert = false, 115 .num_regs = 1, 116 .irqs = max77693_charger_irqs, 117 .num_irqs = ARRAY_SIZE(max77693_charger_irqs), 118 }; 119 120 static const struct regmap_config max77693_regmap_muic_config = { 121 .reg_bits = 8, 122 .val_bits = 8, 123 .max_register = MAX77693_MUIC_REG_END, 124 }; 125 126 static const struct regmap_irq max77693_muic_irqs[] = { 127 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, }, 128 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, }, 129 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, }, 130 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, }, 131 132 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, }, 133 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, }, 134 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, }, 135 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, }, 136 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, }, 137 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, }, 138 139 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, }, 140 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, }, 141 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, }, 142 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, }, 143 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, }, 144 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, }, 145 }; 146 147 static const struct regmap_irq_chip max77693_muic_irq_chip = { 148 .name = "max77693-muic", 149 .status_base = MAX77693_MUIC_REG_INT1, 150 .mask_base = MAX77693_MUIC_REG_INTMASK1, 151 .mask_invert = true, 152 .num_regs = 3, 153 .irqs = max77693_muic_irqs, 154 .num_irqs = ARRAY_SIZE(max77693_muic_irqs), 155 }; 156 157 static const struct regmap_config max77693_regmap_haptic_config = { 158 .reg_bits = 8, 159 .val_bits = 8, 160 .max_register = MAX77693_HAPTIC_REG_END, 161 }; 162 163 static int max77693_i2c_probe(struct i2c_client *i2c, 164 const struct i2c_device_id *id) 165 { 166 struct max77693_dev *max77693; 167 unsigned int reg_data; 168 int ret = 0; 169 170 max77693 = devm_kzalloc(&i2c->dev, 171 sizeof(struct max77693_dev), GFP_KERNEL); 172 if (max77693 == NULL) 173 return -ENOMEM; 174 175 i2c_set_clientdata(i2c, max77693); 176 max77693->dev = &i2c->dev; 177 max77693->i2c = i2c; 178 max77693->irq = i2c->irq; 179 max77693->type = id->driver_data; 180 181 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); 182 if (IS_ERR(max77693->regmap)) { 183 ret = PTR_ERR(max77693->regmap); 184 dev_err(max77693->dev, "failed to allocate register map: %d\n", 185 ret); 186 return ret; 187 } 188 189 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, 190 ®_data); 191 if (ret < 0) { 192 dev_err(max77693->dev, "device not found on this channel\n"); 193 return ret; 194 } else 195 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); 196 197 max77693->i2c_muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); 198 if (!max77693->i2c_muic) { 199 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n"); 200 return -ENODEV; 201 } 202 i2c_set_clientdata(max77693->i2c_muic, max77693); 203 204 max77693->i2c_haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); 205 if (!max77693->i2c_haptic) { 206 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n"); 207 ret = -ENODEV; 208 goto err_i2c_haptic; 209 } 210 i2c_set_clientdata(max77693->i2c_haptic, max77693); 211 212 max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic, 213 &max77693_regmap_haptic_config); 214 if (IS_ERR(max77693->regmap_haptic)) { 215 ret = PTR_ERR(max77693->regmap_haptic); 216 dev_err(max77693->dev, 217 "failed to initialize haptic register map: %d\n", ret); 218 goto err_regmap; 219 } 220 221 /* 222 * Initialize register map for MUIC device because use regmap-muic 223 * instance of MUIC device when irq of max77693 is initialized 224 * before call max77693-muic probe() function. 225 */ 226 max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic, 227 &max77693_regmap_muic_config); 228 if (IS_ERR(max77693->regmap_muic)) { 229 ret = PTR_ERR(max77693->regmap_muic); 230 dev_err(max77693->dev, 231 "failed to allocate register map: %d\n", ret); 232 goto err_regmap; 233 } 234 235 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 236 IRQF_ONESHOT | IRQF_SHARED | 237 IRQF_TRIGGER_FALLING, 0, 238 &max77693_led_irq_chip, 239 &max77693->irq_data_led); 240 if (ret) { 241 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 242 goto err_regmap; 243 } 244 245 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 246 IRQF_ONESHOT | IRQF_SHARED | 247 IRQF_TRIGGER_FALLING, 0, 248 &max77693_topsys_irq_chip, 249 &max77693->irq_data_topsys); 250 if (ret) { 251 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 252 goto err_irq_topsys; 253 } 254 255 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 256 IRQF_ONESHOT | IRQF_SHARED | 257 IRQF_TRIGGER_FALLING, 0, 258 &max77693_charger_irq_chip, 259 &max77693->irq_data_chg); 260 if (ret) { 261 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 262 goto err_irq_charger; 263 } 264 265 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq, 266 IRQF_ONESHOT | IRQF_SHARED | 267 IRQF_TRIGGER_FALLING, 0, 268 &max77693_muic_irq_chip, 269 &max77693->irq_data_muic); 270 if (ret) { 271 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 272 goto err_irq_muic; 273 } 274 275 /* Unmask interrupts from all blocks in interrupt source register */ 276 ret = regmap_update_bits(max77693->regmap, 277 MAX77693_PMIC_REG_INTSRC_MASK, 278 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL); 279 if (ret < 0) { 280 dev_err(max77693->dev, 281 "Could not unmask interrupts in INTSRC: %d\n", 282 ret); 283 goto err_intsrc; 284 } 285 286 pm_runtime_set_active(max77693->dev); 287 288 ret = mfd_add_devices(max77693->dev, -1, max77693_devs, 289 ARRAY_SIZE(max77693_devs), NULL, 0, NULL); 290 if (ret < 0) 291 goto err_mfd; 292 293 return ret; 294 295 err_mfd: 296 mfd_remove_devices(max77693->dev); 297 err_intsrc: 298 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 299 err_irq_muic: 300 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg); 301 err_irq_charger: 302 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 303 err_irq_topsys: 304 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 305 err_regmap: 306 i2c_unregister_device(max77693->i2c_haptic); 307 err_i2c_haptic: 308 i2c_unregister_device(max77693->i2c_muic); 309 return ret; 310 } 311 312 static int max77693_i2c_remove(struct i2c_client *i2c) 313 { 314 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 315 316 mfd_remove_devices(max77693->dev); 317 318 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 319 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg); 320 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 321 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 322 323 i2c_unregister_device(max77693->i2c_muic); 324 i2c_unregister_device(max77693->i2c_haptic); 325 326 return 0; 327 } 328 329 static const struct i2c_device_id max77693_i2c_id[] = { 330 { "max77693", TYPE_MAX77693 }, 331 { } 332 }; 333 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); 334 335 static int max77693_suspend(struct device *dev) 336 { 337 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 338 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 339 340 if (device_may_wakeup(dev)) { 341 enable_irq_wake(max77693->irq); 342 disable_irq(max77693->irq); 343 } 344 345 return 0; 346 } 347 348 static int max77693_resume(struct device *dev) 349 { 350 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 351 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 352 353 if (device_may_wakeup(dev)) { 354 disable_irq_wake(max77693->irq); 355 enable_irq(max77693->irq); 356 } 357 358 return 0; 359 } 360 361 static const struct dev_pm_ops max77693_pm = { 362 .suspend = max77693_suspend, 363 .resume = max77693_resume, 364 }; 365 366 #ifdef CONFIG_OF 367 static const struct of_device_id max77693_dt_match[] = { 368 { .compatible = "maxim,max77693" }, 369 {}, 370 }; 371 #endif 372 373 static struct i2c_driver max77693_i2c_driver = { 374 .driver = { 375 .name = "max77693", 376 .pm = &max77693_pm, 377 .of_match_table = of_match_ptr(max77693_dt_match), 378 }, 379 .probe = max77693_i2c_probe, 380 .remove = max77693_i2c_remove, 381 .id_table = max77693_i2c_id, 382 }; 383 384 static int __init max77693_i2c_init(void) 385 { 386 return i2c_add_driver(&max77693_i2c_driver); 387 } 388 /* init early so consumer devices can complete system boot */ 389 subsys_initcall(max77693_i2c_init); 390 391 static void __exit max77693_i2c_exit(void) 392 { 393 i2c_del_driver(&max77693_i2c_driver); 394 } 395 module_exit(max77693_i2c_exit); 396 397 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); 398 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); 399 MODULE_LICENSE("GPL"); 400