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 { .name = "max77693-charger", }, 47 { .name = "max77693-muic", }, 48 { .name = "max77693-haptic", }, 49 { 50 .name = "max77693-flash", 51 .of_compatible = "maxim,max77693-flash", 52 }, 53 }; 54 55 static const struct regmap_config max77693_regmap_config = { 56 .reg_bits = 8, 57 .val_bits = 8, 58 .max_register = MAX77693_PMIC_REG_END, 59 }; 60 61 static const struct regmap_irq max77693_led_irqs[] = { 62 { .mask = LED_IRQ_FLED2_OPEN, }, 63 { .mask = LED_IRQ_FLED2_SHORT, }, 64 { .mask = LED_IRQ_FLED1_OPEN, }, 65 { .mask = LED_IRQ_FLED1_SHORT, }, 66 { .mask = LED_IRQ_MAX_FLASH, }, 67 }; 68 69 static const struct regmap_irq_chip max77693_led_irq_chip = { 70 .name = "max77693-led", 71 .status_base = MAX77693_LED_REG_FLASH_INT, 72 .mask_base = MAX77693_LED_REG_FLASH_INT_MASK, 73 .mask_invert = false, 74 .num_regs = 1, 75 .irqs = max77693_led_irqs, 76 .num_irqs = ARRAY_SIZE(max77693_led_irqs), 77 }; 78 79 static const struct regmap_irq max77693_topsys_irqs[] = { 80 { .mask = TOPSYS_IRQ_T120C_INT, }, 81 { .mask = TOPSYS_IRQ_T140C_INT, }, 82 { .mask = TOPSYS_IRQ_LOWSYS_INT, }, 83 }; 84 85 static const struct regmap_irq_chip max77693_topsys_irq_chip = { 86 .name = "max77693-topsys", 87 .status_base = MAX77693_PMIC_REG_TOPSYS_INT, 88 .mask_base = MAX77693_PMIC_REG_TOPSYS_INT_MASK, 89 .mask_invert = false, 90 .num_regs = 1, 91 .irqs = max77693_topsys_irqs, 92 .num_irqs = ARRAY_SIZE(max77693_topsys_irqs), 93 }; 94 95 static const struct regmap_irq max77693_charger_irqs[] = { 96 { .mask = CHG_IRQ_BYP_I, }, 97 { .mask = CHG_IRQ_THM_I, }, 98 { .mask = CHG_IRQ_BAT_I, }, 99 { .mask = CHG_IRQ_CHG_I, }, 100 { .mask = CHG_IRQ_CHGIN_I, }, 101 }; 102 103 static const struct regmap_irq_chip max77693_charger_irq_chip = { 104 .name = "max77693-charger", 105 .status_base = MAX77693_CHG_REG_CHG_INT, 106 .mask_base = MAX77693_CHG_REG_CHG_INT_MASK, 107 .mask_invert = false, 108 .num_regs = 1, 109 .irqs = max77693_charger_irqs, 110 .num_irqs = ARRAY_SIZE(max77693_charger_irqs), 111 }; 112 113 static const struct regmap_config max77693_regmap_muic_config = { 114 .reg_bits = 8, 115 .val_bits = 8, 116 .max_register = MAX77693_MUIC_REG_END, 117 }; 118 119 static const struct regmap_irq max77693_muic_irqs[] = { 120 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC, }, 121 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_LOW, }, 122 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC_ERR, }, 123 { .reg_offset = 0, .mask = MUIC_IRQ_INT1_ADC1K, }, 124 125 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGTYP, }, 126 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_CHGDETREUN, }, 127 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DCDTMR, }, 128 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_DXOVP, }, 129 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VBVOLT, }, 130 { .reg_offset = 1, .mask = MUIC_IRQ_INT2_VIDRM, }, 131 132 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_EOC, }, 133 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CGMBC, }, 134 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_OVP, }, 135 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_MBCCHG_ERR, }, 136 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_CHG_ENABLED, }, 137 { .reg_offset = 2, .mask = MUIC_IRQ_INT3_BAT_DET, }, 138 }; 139 140 static const struct regmap_irq_chip max77693_muic_irq_chip = { 141 .name = "max77693-muic", 142 .status_base = MAX77693_MUIC_REG_INT1, 143 .mask_base = MAX77693_MUIC_REG_INTMASK1, 144 .mask_invert = true, 145 .num_regs = 3, 146 .irqs = max77693_muic_irqs, 147 .num_irqs = ARRAY_SIZE(max77693_muic_irqs), 148 }; 149 150 static int max77693_i2c_probe(struct i2c_client *i2c, 151 const struct i2c_device_id *id) 152 { 153 struct max77693_dev *max77693; 154 unsigned int reg_data; 155 int ret = 0; 156 157 max77693 = devm_kzalloc(&i2c->dev, 158 sizeof(struct max77693_dev), GFP_KERNEL); 159 if (max77693 == NULL) 160 return -ENOMEM; 161 162 i2c_set_clientdata(i2c, max77693); 163 max77693->dev = &i2c->dev; 164 max77693->i2c = i2c; 165 max77693->irq = i2c->irq; 166 max77693->type = id->driver_data; 167 168 max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); 169 if (IS_ERR(max77693->regmap)) { 170 ret = PTR_ERR(max77693->regmap); 171 dev_err(max77693->dev, "failed to allocate register map: %d\n", 172 ret); 173 return ret; 174 } 175 176 ret = regmap_read(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, 177 ®_data); 178 if (ret < 0) { 179 dev_err(max77693->dev, "device not found on this channel\n"); 180 return ret; 181 } else 182 dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); 183 184 max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); 185 if (!max77693->muic) { 186 dev_err(max77693->dev, "Failed to allocate I2C device for MUIC\n"); 187 return -ENODEV; 188 } 189 i2c_set_clientdata(max77693->muic, max77693); 190 191 max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); 192 if (!max77693->haptic) { 193 dev_err(max77693->dev, "Failed to allocate I2C device for Haptic\n"); 194 ret = -ENODEV; 195 goto err_i2c_haptic; 196 } 197 i2c_set_clientdata(max77693->haptic, max77693); 198 199 /* 200 * Initialize register map for MUIC device because use regmap-muic 201 * instance of MUIC device when irq of max77693 is initialized 202 * before call max77693-muic probe() function. 203 */ 204 max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, 205 &max77693_regmap_muic_config); 206 if (IS_ERR(max77693->regmap_muic)) { 207 ret = PTR_ERR(max77693->regmap_muic); 208 dev_err(max77693->dev, 209 "failed to allocate register map: %d\n", ret); 210 goto err_regmap_muic; 211 } 212 213 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 214 IRQF_ONESHOT | IRQF_SHARED | 215 IRQF_TRIGGER_FALLING, 0, 216 &max77693_led_irq_chip, 217 &max77693->irq_data_led); 218 if (ret) { 219 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 220 goto err_regmap_muic; 221 } 222 223 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 224 IRQF_ONESHOT | IRQF_SHARED | 225 IRQF_TRIGGER_FALLING, 0, 226 &max77693_topsys_irq_chip, 227 &max77693->irq_data_topsys); 228 if (ret) { 229 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 230 goto err_irq_topsys; 231 } 232 233 ret = regmap_add_irq_chip(max77693->regmap, max77693->irq, 234 IRQF_ONESHOT | IRQF_SHARED | 235 IRQF_TRIGGER_FALLING, 0, 236 &max77693_charger_irq_chip, 237 &max77693->irq_data_charger); 238 if (ret) { 239 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 240 goto err_irq_charger; 241 } 242 243 ret = regmap_add_irq_chip(max77693->regmap_muic, max77693->irq, 244 IRQF_ONESHOT | IRQF_SHARED | 245 IRQF_TRIGGER_FALLING, 0, 246 &max77693_muic_irq_chip, 247 &max77693->irq_data_muic); 248 if (ret) { 249 dev_err(max77693->dev, "failed to add irq chip: %d\n", ret); 250 goto err_irq_muic; 251 } 252 253 /* Unmask interrupts from all blocks in interrupt source register */ 254 ret = regmap_update_bits(max77693->regmap, 255 MAX77693_PMIC_REG_INTSRC_MASK, 256 SRC_IRQ_ALL, (unsigned int)~SRC_IRQ_ALL); 257 if (ret < 0) { 258 dev_err(max77693->dev, 259 "Could not unmask interrupts in INTSRC: %d\n", 260 ret); 261 goto err_intsrc; 262 } 263 264 pm_runtime_set_active(max77693->dev); 265 266 ret = mfd_add_devices(max77693->dev, -1, max77693_devs, 267 ARRAY_SIZE(max77693_devs), NULL, 0, NULL); 268 if (ret < 0) 269 goto err_mfd; 270 271 return ret; 272 273 err_mfd: 274 mfd_remove_devices(max77693->dev); 275 err_intsrc: 276 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 277 err_irq_muic: 278 regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger); 279 err_irq_charger: 280 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 281 err_irq_topsys: 282 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 283 err_regmap_muic: 284 i2c_unregister_device(max77693->haptic); 285 err_i2c_haptic: 286 i2c_unregister_device(max77693->muic); 287 return ret; 288 } 289 290 static int max77693_i2c_remove(struct i2c_client *i2c) 291 { 292 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 293 294 mfd_remove_devices(max77693->dev); 295 296 regmap_del_irq_chip(max77693->irq, max77693->irq_data_muic); 297 regmap_del_irq_chip(max77693->irq, max77693->irq_data_charger); 298 regmap_del_irq_chip(max77693->irq, max77693->irq_data_topsys); 299 regmap_del_irq_chip(max77693->irq, max77693->irq_data_led); 300 301 i2c_unregister_device(max77693->muic); 302 i2c_unregister_device(max77693->haptic); 303 304 return 0; 305 } 306 307 static const struct i2c_device_id max77693_i2c_id[] = { 308 { "max77693", TYPE_MAX77693 }, 309 { } 310 }; 311 MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); 312 313 static int max77693_suspend(struct device *dev) 314 { 315 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 316 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 317 318 if (device_may_wakeup(dev)) { 319 enable_irq_wake(max77693->irq); 320 disable_irq(max77693->irq); 321 } 322 323 return 0; 324 } 325 326 static int max77693_resume(struct device *dev) 327 { 328 struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 329 struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 330 331 if (device_may_wakeup(dev)) { 332 disable_irq_wake(max77693->irq); 333 enable_irq(max77693->irq); 334 } 335 336 return 0; 337 } 338 339 static const struct dev_pm_ops max77693_pm = { 340 .suspend = max77693_suspend, 341 .resume = max77693_resume, 342 }; 343 344 #ifdef CONFIG_OF 345 static const struct of_device_id max77693_dt_match[] = { 346 { .compatible = "maxim,max77693" }, 347 {}, 348 }; 349 #endif 350 351 static struct i2c_driver max77693_i2c_driver = { 352 .driver = { 353 .name = "max77693", 354 .owner = THIS_MODULE, 355 .pm = &max77693_pm, 356 .of_match_table = of_match_ptr(max77693_dt_match), 357 }, 358 .probe = max77693_i2c_probe, 359 .remove = max77693_i2c_remove, 360 .id_table = max77693_i2c_id, 361 }; 362 363 static int __init max77693_i2c_init(void) 364 { 365 return i2c_add_driver(&max77693_i2c_driver); 366 } 367 /* init early so consumer devices can complete system boot */ 368 subsys_initcall(max77693_i2c_init); 369 370 static void __exit max77693_i2c_exit(void) 371 { 372 i2c_del_driver(&max77693_i2c_driver); 373 } 374 module_exit(max77693_i2c_exit); 375 376 MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); 377 MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); 378 MODULE_LICENSE("GPL"); 379