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-private.h> 37 #include <linux/regulator/machine.h> 38 #include <linux/regmap.h> 39 40 #define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */ 41 #define I2C_ADDR_MUIC (0x4A >> 1) 42 #define I2C_ADDR_HAPTIC (0x90 >> 1) 43 44 static const struct mfd_cell max77693_devs[] = { 45 { .name = "max77693-pmic", }, 46 { 47 .name = "max77693-charger", 48 .of_compatible = "maxim,max77693-charger", 49 }, 50 { .name = "max77693-muic", }, 51 { 52 .name = "max77693-haptic", 53 .of_compatible = "maxim,max77693-haptic", 54 }, 55 { 56 .name = "max77693-flash", 57 .of_compatible = "maxim,max77693-flash", 58 }, 59 }; 60 61 static const struct regmap_config max77693_regmap_config = { 62 .reg_bits = 8, 63 .val_bits = 8, 64 .max_register = MAX77693_PMIC_REG_END, 65 }; 66 67 static const struct regmap_irq max77693_led_irqs[] = { 68 { .mask = LED_IRQ_FLED2_OPEN, }, 69 { .mask = LED_IRQ_FLED2_SHORT, }, 70 { .mask = LED_IRQ_FLED1_OPEN, }, 71 { .mask = LED_IRQ_FLED1_SHORT, }, 72 { .mask = LED_IRQ_MAX_FLASH, }, 73 }; 74 75 static const struct regmap_irq_chip max77693_led_irq_chip = { 76 .name = "max77693-led", 77 .status_base = MAX77693_LED_REG_FLASH_INT, 78 .mask_base = MAX77693_LED_REG_FLASH_INT_MASK, 79 .mask_invert = false, 80 .num_regs = 1, 81 .irqs = max77693_led_irqs, 82 .num_irqs = ARRAY_SIZE(max77693_led_irqs), 83 }; 84 85 static const struct regmap_irq max77693_topsys_irqs[] = { 86 { .mask = TOPSYS_IRQ_T120C_INT, }, 87 { .mask = TOPSYS_IRQ_T140C_INT, }, 88 { .mask = TOPSYS_IRQ_LOWSYS_INT, }, 89 }; 90 91 static const struct regmap_irq_chip max77693_topsys_irq_chip = { 92 .name = "max77693-topsys", 93 .status_base = MAX77693_PMIC_REG_TOPSYS_INT, 94 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK, 95 .mask_invert = false, 96 .num_regs = 1, 97 .irqs = max77693_topsys_irqs, 98 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs), 99 }; 100 101 static const struct regmap_irq max77693_charger_irqs[] = { 102 { .mask = CHG_IRQ_BYP_I, }, 103 { .mask = CHG_IRQ_THM_I, }, 104 { .mask = CHG_IRQ_BAT_I, }, 105 { .mask = CHG_IRQ_CHG_I, }, 106 { .mask = CHG_IRQ_CHGIN_I, }, 107 }; 108 109 static const struct regmap_irq_chip max77693_charger_irq_chip = { 110 .name = "max77693-charger", 111 .status_base = MAX77693_CHG_REG_CHG_INT, 112 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK, 113 .mask_invert = false, 114 .num_regs = 1, 115 .irqs = max77693_charger_irqs, 116 .num_irqs = ARRAY_SIZE(max77693_charger_irqs), 117 }; 118 119 static const struct regmap_config max77693_regmap_muic_config = { 120 .reg_bits = 8, 121 .val_bits = 8, 122 .max_register = MAX77693_MUIC_REG_END, 123 }; 124 125 static const struct regmap_irq max77693_muic_irqs[] = { 126 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, }, 127 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, }, 128 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, }, 129 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, }, 130 131 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, }, 132 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, }, 133 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, }, 134 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, }, 135 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, }, 136 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, }, 137 138 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, }, 139 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, }, 140 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, }, 141 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, }, 142 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, }, 143 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, }, 144 }; 145 146 static const struct regmap_irq_chip max77693_muic_irq_chip = { 147 .name = "max77693-muic", 148 .status_base = MAX77693_MUIC_REG_INT1, 149 .mask_base = MAX77693_MUIC_REG_INTMASK1, 150 .mask_invert = true, 151 .num_regs = 3, 152 .irqs = max77693_muic_irqs, 153 .num_irqs = ARRAY_SIZE(max77693_muic_irqs), 154 }; 155 156 static const struct regmap_config max77693_regmap_haptic_config = { 157 .reg_bits = 8, 158 .val_bits = 8, 159 .max_register = MAX77693_HAPTIC_REG_END, 160 }; 161 162 static int max77693_i2c_probe(struct i2c_client *i2c, 163 const struct i2c_device_id *id) 164 { 165 struct max77693_dev *max77693; 166 unsigned int reg_data; 167 int ret = 0; 168 169 max77693 = devm_kzalloc(&i2c->dev, 170 sizeof(struct max77693_dev), GFP_KERNEL); 171 if (max77693 == NULL) 172 return -ENOMEM; 173 174 i2c_set_clientdata(i2c, max77693); 175 max77693->dev = &i2c->dev; 176 max77693->i2c = i2c; 177 max77693->irq = i2c->irq; 178 max77693->type = id->driver_data; 179 180 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); 181 if (IS_ERR(max77693->regmap)) { 182 ret = PTR_ERR(max77693->regmap); 183 dev_err(max77693->dev, "failed to allocate register map: %d\n", 184 ret); 185 return ret; 186 } 187 188 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, 189 ®_data); 190 if (ret < 0) { 191 dev_err(max77693->dev, "device not found on this channel\n"); 192 return ret; 193 } else 194 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); 195 196 max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); 197 if (!max77693->muic) { 198 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n"); 199 return -ENODEV; 200 } 201 i2c_set_clientdata(max77693->muic, max77693); 202 203 max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); 204 if (!max77693->haptic) { 205 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n"); 206 ret = -ENODEV; 207 goto err_i2c_haptic; 208 } 209 i2c_set_clientdata(max77693->haptic, max77693); 210 211 max77693->regmap_haptic = devm_regmap_init_i2c(max77693->haptic, 212 &max77693_regmap_haptic_config); 213 if (IS_ERR(max77693->regmap_haptic)) { 214 ret = PTR_ERR(max77693->regmap_haptic); 215 dev_err(max77693->dev, 216 "failed to initialize haptic register map: %d\n", ret); 217 goto err_regmap; 218 } 219 220 /* 221 * Initialize register map for MUIC device because use regmap-muic 222 * instance of MUIC device when irq of max77693 is initialized 223 * before call max77693-muic probe() function. 224 */ 225 max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, 226 &max77693_regmap_muic_config); 227 if (IS_ERR(max77693->regmap_muic)) { 228 ret = PTR_ERR(max77693->regmap_muic); 229 dev_err(max77693->dev, 230 "failed to allocate register map: %d\n", ret); 231 goto err_regmap; 232 } 233 234 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 235 IRQF_ONESHOT | IRQF_SHARED | 236 IRQF_TRIGGER_FALLING, 0, 237 &max77693_led_irq_chip, 238 &max77693->irq_data_led); 239 if (ret) { 240 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 241 goto err_regmap; 242 } 243 244 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 245 IRQF_ONESHOT | IRQF_SHARED | 246 IRQF_TRIGGER_FALLING, 0, 247 &max77693_topsys_irq_chip, 248 &max77693->irq_data_topsys); 249 if (ret) { 250 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 251 goto err_irq_topsys; 252 } 253 254 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 255 IRQF_ONESHOT | IRQF_SHARED | 256 IRQF_TRIGGER_FALLING, 0, 257 &max77693_charger_irq_chip, 258 &max77693->irq_data_charger); 259 if (ret) { 260 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 261 goto err_irq_charger; 262 } 263 264 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq, 265 IRQF_ONESHOT | IRQF_SHARED | 266 IRQF_TRIGGER_FALLING, 0, 267 &max77693_muic_irq_chip, 268 &max77693->irq_data_muic); 269 if (ret) { 270 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 271 goto err_irq_muic; 272 } 273 274 /* Unmask interrupts from all blocks in interrupt source register */ 275 ret = regmap_update_bits(max77693->regmap, 276 MAX77693_PMIC_REG_INTSRC_MASK, 277 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL); 278 if (ret < 0) { 279 dev_err(max77693->dev, 280 "Could not unmask interrupts in INTSRC: %d\n", 281 ret); 282 goto err_intsrc; 283 } 284 285 pm_runtime_set_active(max77693->dev); 286 287 ret = mfd_add_devices(max77693->dev, -1, max77693_devs, 288 ARRAY_SIZE(max77693_devs), NULL, 0, NULL); 289 if (ret < 0) 290 goto err_mfd; 291 292 return ret; 293 294 err_mfd: 295 mfd_remove_devices(max77693->dev); 296 err_intsrc: 297 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 298 err_irq_muic: 299 regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger); 300 err_irq_charger: 301 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 302 err_irq_topsys: 303 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 304 err_regmap: 305 i2c_unregister_device(max77693->haptic); 306 err_i2c_haptic: 307 i2c_unregister_device(max77693->muic); 308 return ret; 309 } 310 311 static int max77693_i2c_remove(struct i2c_client *i2c) 312 { 313 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 314 315 mfd_remove_devices(max77693->dev); 316 317 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 318 regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger); 319 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 320 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 321 322 i2c_unregister_device(max77693->muic); 323 i2c_unregister_device(max77693->haptic); 324 325 return 0; 326 } 327 328 static const struct i2c_device_id max77693_i2c_id[] = { 329 { "max77693", TYPE_MAX77693 }, 330 { } 331 }; 332 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); 333 334 static int max77693_suspend(struct device *dev) 335 { 336 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 337 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 338 339 if (device_may_wakeup(dev)) { 340 enable_irq_wake(max77693->irq); 341 disable_irq(max77693->irq); 342 } 343 344 return 0; 345 } 346 347 static int max77693_resume(struct device *dev) 348 { 349 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 350 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 351 352 if (device_may_wakeup(dev)) { 353 disable_irq_wake(max77693->irq); 354 enable_irq(max77693->irq); 355 } 356 357 return 0; 358 } 359 360 static const struct dev_pm_ops max77693_pm = { 361 .suspend = max77693_suspend, 362 .resume = max77693_resume, 363 }; 364 365 #ifdef CONFIG_OF 366 static const struct of_device_id max77693_dt_match[] = { 367 { .compatible = "maxim,max77693" }, 368 {}, 369 }; 370 #endif 371 372 static struct i2c_driver max77693_i2c_driver = { 373 .driver = { 374 .name = "max77693", 375 .owner = THIS_MODULE, 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