1 /* 2 * max77693.c - mfd core driver for the MAX 77693 3 * 4 * Copyright (C) 2012 Samsung Electronics 5 * SangYoung Son <hello.son@samsung.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 { 52 .name = "max77693-muic", 53 .of_compatible = "maxim,max77693-muic", 54 }, 55 { 56 .name = "max77693-haptic", 57 .of_compatible = "maxim,max77693-haptic", 58 }, 59 { 60 .name = "max77693-led", 61 .of_compatible = "maxim,max77693-led", 62 }, 63 }; 64 65 static const struct regmap_config max77693_regmap_config = { 66 .reg_bits = 8, 67 .val_bits = 8, 68 .max_register = MAX77693_PMIC_REG_END, 69 }; 70 71 static const struct regmap_irq max77693_led_irqs[] = { 72 { .mask = LED_IRQ_FLED2_OPEN, }, 73 { .mask = LED_IRQ_FLED2_SHORT, }, 74 { .mask = LED_IRQ_FLED1_OPEN, }, 75 { .mask = LED_IRQ_FLED1_SHORT, }, 76 { .mask = LED_IRQ_MAX_FLASH, }, 77 }; 78 79 static const struct regmap_irq_chip max77693_led_irq_chip = { 80 .name = "max77693-led", 81 .status_base = MAX77693_LED_REG_FLASH_INT, 82 .mask_base = MAX77693_LED_REG_FLASH_INT_MASK, 83 .mask_invert = false, 84 .num_regs = 1, 85 .irqs = max77693_led_irqs, 86 .num_irqs = ARRAY_SIZE(max77693_led_irqs), 87 }; 88 89 static const struct regmap_irq max77693_topsys_irqs[] = { 90 { .mask = TOPSYS_IRQ_T120C_INT, }, 91 { .mask = TOPSYS_IRQ_T140C_INT, }, 92 { .mask = TOPSYS_IRQ_LOWSYS_INT, }, 93 }; 94 95 static const struct regmap_irq_chip max77693_topsys_irq_chip = { 96 .name = "max77693-topsys", 97 .status_base = MAX77693_PMIC_REG_TOPSYS_INT, 98 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK, 99 .mask_invert = false, 100 .num_regs = 1, 101 .irqs = max77693_topsys_irqs, 102 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs), 103 }; 104 105 static const struct regmap_irq max77693_charger_irqs[] = { 106 { .mask = CHG_IRQ_BYP_I, }, 107 { .mask = CHG_IRQ_THM_I, }, 108 { .mask = CHG_IRQ_BAT_I, }, 109 { .mask = CHG_IRQ_CHG_I, }, 110 { .mask = CHG_IRQ_CHGIN_I, }, 111 }; 112 113 static const struct regmap_irq_chip max77693_charger_irq_chip = { 114 .name = "max77693-charger", 115 .status_base = MAX77693_CHG_REG_CHG_INT, 116 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK, 117 .mask_invert = false, 118 .num_regs = 1, 119 .irqs = max77693_charger_irqs, 120 .num_irqs = ARRAY_SIZE(max77693_charger_irqs), 121 }; 122 123 static const struct regmap_config max77693_regmap_muic_config = { 124 .reg_bits = 8, 125 .val_bits = 8, 126 .max_register = MAX77693_MUIC_REG_END, 127 }; 128 129 static const struct regmap_irq max77693_muic_irqs[] = { 130 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, }, 131 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, }, 132 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, }, 133 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, }, 134 135 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, }, 136 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, }, 137 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, }, 138 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, }, 139 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, }, 140 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, }, 141 142 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, }, 143 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, }, 144 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, }, 145 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, }, 146 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, }, 147 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, }, 148 }; 149 150 static const struct regmap_irq_chip max77693_muic_irq_chip = { 151 .name = "max77693-muic", 152 .status_base = MAX77693_MUIC_REG_INT1, 153 .mask_base = MAX77693_MUIC_REG_INTMASK1, 154 .mask_invert = true, 155 .num_regs = 3, 156 .irqs = max77693_muic_irqs, 157 .num_irqs = ARRAY_SIZE(max77693_muic_irqs), 158 }; 159 160 static const struct regmap_config max77693_regmap_haptic_config = { 161 .reg_bits = 8, 162 .val_bits = 8, 163 .max_register = MAX77693_HAPTIC_REG_END, 164 }; 165 166 static int max77693_i2c_probe(struct i2c_client *i2c, 167 const struct i2c_device_id *id) 168 { 169 struct max77693_dev *max77693; 170 unsigned int reg_data; 171 int ret = 0; 172 173 max77693 = devm_kzalloc(&i2c->dev, 174 sizeof(struct max77693_dev), GFP_KERNEL); 175 if (max77693 == NULL) 176 return -ENOMEM; 177 178 i2c_set_clientdata(i2c, max77693); 179 max77693->dev = &i2c->dev; 180 max77693->i2c = i2c; 181 max77693->irq = i2c->irq; 182 max77693->type = id->driver_data; 183 184 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); 185 if (IS_ERR(max77693->regmap)) { 186 ret = PTR_ERR(max77693->regmap); 187 dev_err(max77693->dev, "failed to allocate register map: %d\n", 188 ret); 189 return ret; 190 } 191 192 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, 193 ®_data); 194 if (ret < 0) { 195 dev_err(max77693->dev, "device not found on this channel\n"); 196 return ret; 197 } else 198 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); 199 200 max77693->i2c_muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); 201 if (!max77693->i2c_muic) { 202 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n"); 203 return -ENODEV; 204 } 205 i2c_set_clientdata(max77693->i2c_muic, max77693); 206 207 max77693->i2c_haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); 208 if (!max77693->i2c_haptic) { 209 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n"); 210 ret = -ENODEV; 211 goto err_i2c_haptic; 212 } 213 i2c_set_clientdata(max77693->i2c_haptic, max77693); 214 215 max77693->regmap_haptic = devm_regmap_init_i2c(max77693->i2c_haptic, 216 &max77693_regmap_haptic_config); 217 if (IS_ERR(max77693->regmap_haptic)) { 218 ret = PTR_ERR(max77693->regmap_haptic); 219 dev_err(max77693->dev, 220 "failed to initialize haptic register map: %d\n", ret); 221 goto err_regmap; 222 } 223 224 /* 225 * Initialize register map for MUIC device because use regmap-muic 226 * instance of MUIC device when irq of max77693 is initialized 227 * before call max77693-muic probe() function. 228 */ 229 max77693->regmap_muic = devm_regmap_init_i2c(max77693->i2c_muic, 230 &max77693_regmap_muic_config); 231 if (IS_ERR(max77693->regmap_muic)) { 232 ret = PTR_ERR(max77693->regmap_muic); 233 dev_err(max77693->dev, 234 "failed to allocate register map: %d\n", ret); 235 goto err_regmap; 236 } 237 238 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 239 IRQF_ONESHOT | IRQF_SHARED | 240 IRQF_TRIGGER_FALLING, 0, 241 &max77693_led_irq_chip, 242 &max77693->irq_data_led); 243 if (ret) { 244 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 245 goto err_regmap; 246 } 247 248 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 249 IRQF_ONESHOT | IRQF_SHARED | 250 IRQF_TRIGGER_FALLING, 0, 251 &max77693_topsys_irq_chip, 252 &max77693->irq_data_topsys); 253 if (ret) { 254 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 255 goto err_irq_topsys; 256 } 257 258 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 259 IRQF_ONESHOT | IRQF_SHARED | 260 IRQF_TRIGGER_FALLING, 0, 261 &max77693_charger_irq_chip, 262 &max77693->irq_data_chg); 263 if (ret) { 264 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 265 goto err_irq_charger; 266 } 267 268 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq, 269 IRQF_ONESHOT | IRQF_SHARED | 270 IRQF_TRIGGER_FALLING, 0, 271 &max77693_muic_irq_chip, 272 &max77693->irq_data_muic); 273 if (ret) { 274 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 275 goto err_irq_muic; 276 } 277 278 /* Unmask interrupts from all blocks in interrupt source register */ 279 ret = regmap_update_bits(max77693->regmap, 280 MAX77693_PMIC_REG_INTSRC_MASK, 281 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL); 282 if (ret < 0) { 283 dev_err(max77693->dev, 284 "Could not unmask interrupts in INTSRC: %d\n", 285 ret); 286 goto err_intsrc; 287 } 288 289 pm_runtime_set_active(max77693->dev); 290 291 ret = mfd_add_devices(max77693->dev, -1, max77693_devs, 292 ARRAY_SIZE(max77693_devs), NULL, 0, NULL); 293 if (ret < 0) 294 goto err_mfd; 295 296 return ret; 297 298 err_mfd: 299 mfd_remove_devices(max77693->dev); 300 err_intsrc: 301 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 302 err_irq_muic: 303 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg); 304 err_irq_charger: 305 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 306 err_irq_topsys: 307 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 308 err_regmap: 309 i2c_unregister_device(max77693->i2c_haptic); 310 err_i2c_haptic: 311 i2c_unregister_device(max77693->i2c_muic); 312 return ret; 313 } 314 315 static int max77693_i2c_remove(struct i2c_client *i2c) 316 { 317 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 318 319 mfd_remove_devices(max77693->dev); 320 321 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 322 regmap_del_irq_chip(max77693->irq, max77693->irq_data_chg); 323 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 324 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 325 326 i2c_unregister_device(max77693->i2c_muic); 327 i2c_unregister_device(max77693->i2c_haptic); 328 329 return 0; 330 } 331 332 static const struct i2c_device_id max77693_i2c_id[] = { 333 { "max77693", TYPE_MAX77693 }, 334 { } 335 }; 336 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); 337 338 static int max77693_suspend(struct device *dev) 339 { 340 struct i2c_client *i2c = to_i2c_client(dev); 341 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 342 343 if (device_may_wakeup(dev)) { 344 enable_irq_wake(max77693->irq); 345 disable_irq(max77693->irq); 346 } 347 348 return 0; 349 } 350 351 static int max77693_resume(struct device *dev) 352 { 353 struct i2c_client *i2c = to_i2c_client(dev); 354 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 355 356 if (device_may_wakeup(dev)) { 357 disable_irq_wake(max77693->irq); 358 enable_irq(max77693->irq); 359 } 360 361 return 0; 362 } 363 364 static const struct dev_pm_ops max77693_pm = { 365 .suspend = max77693_suspend, 366 .resume = max77693_resume, 367 }; 368 369 #ifdef CONFIG_OF 370 static const struct of_device_id max77693_dt_match[] = { 371 { .compatible = "maxim,max77693" }, 372 {}, 373 }; 374 MODULE_DEVICE_TABLE(of, max77693_dt_match); 375 #endif 376 377 static struct i2c_driver max77693_i2c_driver = { 378 .driver = { 379 .name = "max77693", 380 .pm = &max77693_pm, 381 .of_match_table = of_match_ptr(max77693_dt_match), 382 }, 383 .probe = max77693_i2c_probe, 384 .remove = max77693_i2c_remove, 385 .id_table = max77693_i2c_id, 386 }; 387 388 module_i2c_driver(max77693_i2c_driver); 389 390 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); 391 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); 392 MODULE_LICENSE("GPL"); 393