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