1156f2528SKyungmin Park /* 22c7e6f57SJoonyoung Shim * max8998.c - mfd core driver for the Maxim 8998 3156f2528SKyungmin Park * 4156f2528SKyungmin Park * Copyright (C) 2009-2010 Samsung Electronics 5156f2528SKyungmin Park * Kyungmin Park <kyungmin.park@samsung.com> 6156f2528SKyungmin Park * Marek Szyprowski <m.szyprowski@samsung.com> 7156f2528SKyungmin Park * 8156f2528SKyungmin Park * This program is free software; you can redistribute it and/or modify 9156f2528SKyungmin Park * it under the terms of the GNU General Public License as published by 10156f2528SKyungmin Park * the Free Software Foundation; either version 2 of the License, or 11156f2528SKyungmin Park * (at your option) any later version. 12156f2528SKyungmin Park * 13156f2528SKyungmin Park * This program is distributed in the hope that it will be useful, 14156f2528SKyungmin Park * but WITHOUT ANY WARRANTY; without even the implied warranty of 15156f2528SKyungmin Park * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16156f2528SKyungmin Park * GNU General Public License for more details. 17156f2528SKyungmin Park * 18156f2528SKyungmin Park * You should have received a copy of the GNU General Public License 19156f2528SKyungmin Park * along with this program; if not, write to the Free Software 20156f2528SKyungmin Park * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 21156f2528SKyungmin Park */ 22156f2528SKyungmin Park 23ee999fb3STomasz Figa #include <linux/err.h> 24156f2528SKyungmin Park #include <linux/module.h> 25156f2528SKyungmin Park #include <linux/moduleparam.h> 26156f2528SKyungmin Park #include <linux/init.h> 27156f2528SKyungmin Park #include <linux/slab.h> 28156f2528SKyungmin Park #include <linux/i2c.h> 29cdd137c9SMyungJoo Ham #include <linux/interrupt.h> 30ee999fb3STomasz Figa #include <linux/of.h> 31ee999fb3STomasz Figa #include <linux/of_irq.h> 32cdd137c9SMyungJoo Ham #include <linux/pm_runtime.h> 33156f2528SKyungmin Park #include <linux/mutex.h> 34156f2528SKyungmin Park #include <linux/mfd/core.h> 35156f2528SKyungmin Park #include <linux/mfd/max8998.h> 36156f2528SKyungmin Park #include <linux/mfd/max8998-private.h> 37156f2528SKyungmin Park 389b16c0a4SJoonyoung Shim #define RTC_I2C_ADDR (0x0c >> 1) 399b16c0a4SJoonyoung Shim 407c0517b1SGeert Uytterhoeven static const struct mfd_cell max8998_devs[] = { 41156f2528SKyungmin Park { 42156f2528SKyungmin Park .name = "max8998-pmic", 439b16c0a4SJoonyoung Shim }, { 449b16c0a4SJoonyoung Shim .name = "max8998-rtc", 45bb4ce970SDonggeun Kim }, { 46bb4ce970SDonggeun Kim .name = "max8998-battery", 479b16c0a4SJoonyoung Shim }, 48156f2528SKyungmin Park }; 49156f2528SKyungmin Park 507c0517b1SGeert Uytterhoeven static const struct mfd_cell lp3974_devs[] = { 51337ce5d1SMyungJoo Ham { 52337ce5d1SMyungJoo Ham .name = "lp3974-pmic", 53337ce5d1SMyungJoo Ham }, { 54337ce5d1SMyungJoo Ham .name = "lp3974-rtc", 55337ce5d1SMyungJoo Ham }, 56337ce5d1SMyungJoo Ham }; 57337ce5d1SMyungJoo Ham 58676e02d7SJoonyoung Shim int max8998_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) 59156f2528SKyungmin Park { 60676e02d7SJoonyoung Shim struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 61156f2528SKyungmin Park int ret; 62156f2528SKyungmin Park 63156f2528SKyungmin Park mutex_lock(&max8998->iolock); 64676e02d7SJoonyoung Shim ret = i2c_smbus_read_byte_data(i2c, reg); 65156f2528SKyungmin Park mutex_unlock(&max8998->iolock); 66156f2528SKyungmin Park if (ret < 0) 67156f2528SKyungmin Park return ret; 68156f2528SKyungmin Park 69156f2528SKyungmin Park ret &= 0xff; 70156f2528SKyungmin Park *dest = ret; 71156f2528SKyungmin Park return 0; 72156f2528SKyungmin Park } 73676e02d7SJoonyoung Shim EXPORT_SYMBOL(max8998_read_reg); 74156f2528SKyungmin Park 752c7e6f57SJoonyoung Shim int max8998_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) 762c7e6f57SJoonyoung Shim { 772c7e6f57SJoonyoung Shim struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 782c7e6f57SJoonyoung Shim int ret; 792c7e6f57SJoonyoung Shim 802c7e6f57SJoonyoung Shim mutex_lock(&max8998->iolock); 812c7e6f57SJoonyoung Shim ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); 822c7e6f57SJoonyoung Shim mutex_unlock(&max8998->iolock); 832c7e6f57SJoonyoung Shim if (ret < 0) 842c7e6f57SJoonyoung Shim return ret; 852c7e6f57SJoonyoung Shim 862c7e6f57SJoonyoung Shim return 0; 872c7e6f57SJoonyoung Shim } 882c7e6f57SJoonyoung Shim EXPORT_SYMBOL(max8998_bulk_read); 892c7e6f57SJoonyoung Shim 90676e02d7SJoonyoung Shim int max8998_write_reg(struct i2c_client *i2c, u8 reg, u8 value) 91156f2528SKyungmin Park { 92676e02d7SJoonyoung Shim struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 93156f2528SKyungmin Park int ret; 94156f2528SKyungmin Park 95156f2528SKyungmin Park mutex_lock(&max8998->iolock); 96676e02d7SJoonyoung Shim ret = i2c_smbus_write_byte_data(i2c, reg, value); 97156f2528SKyungmin Park mutex_unlock(&max8998->iolock); 98156f2528SKyungmin Park return ret; 99156f2528SKyungmin Park } 100676e02d7SJoonyoung Shim EXPORT_SYMBOL(max8998_write_reg); 101156f2528SKyungmin Park 1029b16c0a4SJoonyoung Shim int max8998_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) 1039b16c0a4SJoonyoung Shim { 1049b16c0a4SJoonyoung Shim struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 1059b16c0a4SJoonyoung Shim int ret; 1069b16c0a4SJoonyoung Shim 1079b16c0a4SJoonyoung Shim mutex_lock(&max8998->iolock); 1089b16c0a4SJoonyoung Shim ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); 1099b16c0a4SJoonyoung Shim mutex_unlock(&max8998->iolock); 1109b16c0a4SJoonyoung Shim if (ret < 0) 1119b16c0a4SJoonyoung Shim return ret; 1129b16c0a4SJoonyoung Shim 1139b16c0a4SJoonyoung Shim return 0; 1149b16c0a4SJoonyoung Shim } 1159b16c0a4SJoonyoung Shim EXPORT_SYMBOL(max8998_bulk_write); 1169b16c0a4SJoonyoung Shim 117676e02d7SJoonyoung Shim int max8998_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) 118156f2528SKyungmin Park { 119676e02d7SJoonyoung Shim struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 120156f2528SKyungmin Park int ret; 121156f2528SKyungmin Park 122156f2528SKyungmin Park mutex_lock(&max8998->iolock); 123676e02d7SJoonyoung Shim ret = i2c_smbus_read_byte_data(i2c, reg); 124156f2528SKyungmin Park if (ret >= 0) { 125156f2528SKyungmin Park u8 old_val = ret & 0xff; 126156f2528SKyungmin Park u8 new_val = (val & mask) | (old_val & (~mask)); 127676e02d7SJoonyoung Shim ret = i2c_smbus_write_byte_data(i2c, reg, new_val); 128156f2528SKyungmin Park } 129156f2528SKyungmin Park mutex_unlock(&max8998->iolock); 130156f2528SKyungmin Park return ret; 131156f2528SKyungmin Park } 132676e02d7SJoonyoung Shim EXPORT_SYMBOL(max8998_update_reg); 133156f2528SKyungmin Park 134ee999fb3STomasz Figa #ifdef CONFIG_OF 135ee999fb3STomasz Figa static struct of_device_id max8998_dt_match[] = { 136ee999fb3STomasz Figa { .compatible = "maxim,max8998", .data = (void *)TYPE_MAX8998 }, 137ee999fb3STomasz Figa { .compatible = "national,lp3974", .data = (void *)TYPE_LP3974 }, 138ee999fb3STomasz Figa { .compatible = "ti,lp3974", .data = (void *)TYPE_LP3974 }, 139ee999fb3STomasz Figa {}, 140ee999fb3STomasz Figa }; 141ee999fb3STomasz Figa MODULE_DEVICE_TABLE(of, max8998_dt_match); 142ee999fb3STomasz Figa #endif 143ee999fb3STomasz Figa 144ee999fb3STomasz Figa /* 145ee999fb3STomasz Figa * Only the common platform data elements for max8998 are parsed here from the 146ee999fb3STomasz Figa * device tree. Other sub-modules of max8998 such as pmic, rtc and others have 147ee999fb3STomasz Figa * to parse their own platform data elements from device tree. 148ee999fb3STomasz Figa * 149ee999fb3STomasz Figa * The max8998 platform data structure is instantiated here and the drivers for 150ee999fb3STomasz Figa * the sub-modules need not instantiate another instance while parsing their 151ee999fb3STomasz Figa * platform data. 152ee999fb3STomasz Figa */ 153ee999fb3STomasz Figa static struct max8998_platform_data *max8998_i2c_parse_dt_pdata( 154ee999fb3STomasz Figa struct device *dev) 155ee999fb3STomasz Figa { 156ee999fb3STomasz Figa struct max8998_platform_data *pd; 157ee999fb3STomasz Figa 158ee999fb3STomasz Figa pd = devm_kzalloc(dev, sizeof(*pd), GFP_KERNEL); 159ee999fb3STomasz Figa if (!pd) 160ee999fb3STomasz Figa return ERR_PTR(-ENOMEM); 161ee999fb3STomasz Figa 162ee999fb3STomasz Figa pd->ono = irq_of_parse_and_map(dev->of_node, 1); 163ee999fb3STomasz Figa 164ee999fb3STomasz Figa /* 165ee999fb3STomasz Figa * ToDo: the 'wakeup' member in the platform data is more of a linux 166ee999fb3STomasz Figa * specfic information. Hence, there is no binding for that yet and 167ee999fb3STomasz Figa * not parsed here. 168ee999fb3STomasz Figa */ 169ee999fb3STomasz Figa return pd; 170ee999fb3STomasz Figa } 171ee999fb3STomasz Figa 1728bace2d5SLee Jones static inline unsigned long max8998_i2c_get_driver_data(struct i2c_client *i2c, 173ee999fb3STomasz Figa const struct i2c_device_id *id) 174ee999fb3STomasz Figa { 175ee999fb3STomasz Figa if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) { 176ee999fb3STomasz Figa const struct of_device_id *match; 177ee999fb3STomasz Figa match = of_match_node(max8998_dt_match, i2c->dev.of_node); 1788bace2d5SLee Jones return (unsigned long)match->data; 179ee999fb3STomasz Figa } 180ee999fb3STomasz Figa 1818bace2d5SLee Jones return id->driver_data; 182ee999fb3STomasz Figa } 183ee999fb3STomasz Figa 184156f2528SKyungmin Park static int max8998_i2c_probe(struct i2c_client *i2c, 185156f2528SKyungmin Park const struct i2c_device_id *id) 186156f2528SKyungmin Park { 187334a41ceSJingoo Han struct max8998_platform_data *pdata = dev_get_platdata(&i2c->dev); 188156f2528SKyungmin Park struct max8998_dev *max8998; 189156f2528SKyungmin Park int ret = 0; 190156f2528SKyungmin Park 1910010dd38SJingoo Han max8998 = devm_kzalloc(&i2c->dev, sizeof(struct max8998_dev), 1920010dd38SJingoo Han GFP_KERNEL); 1938f1f151eSAxel Lin if (max8998 == NULL) 194156f2528SKyungmin Park return -ENOMEM; 195156f2528SKyungmin Park 196ee999fb3STomasz Figa if (IS_ENABLED(CONFIG_OF) && i2c->dev.of_node) { 197ee999fb3STomasz Figa pdata = max8998_i2c_parse_dt_pdata(&i2c->dev); 198ee999fb3STomasz Figa if (IS_ERR(pdata)) { 199ee999fb3STomasz Figa ret = PTR_ERR(pdata); 200ee999fb3STomasz Figa goto err; 201ee999fb3STomasz Figa } 202ee999fb3STomasz Figa } 203ee999fb3STomasz Figa 204156f2528SKyungmin Park i2c_set_clientdata(i2c, max8998); 205156f2528SKyungmin Park max8998->dev = &i2c->dev; 206676e02d7SJoonyoung Shim max8998->i2c = i2c; 2072c7e6f57SJoonyoung Shim max8998->irq = i2c->irq; 208ee999fb3STomasz Figa max8998->type = max8998_i2c_get_driver_data(i2c, id); 209ee999fb3STomasz Figa max8998->pdata = pdata; 2102c7e6f57SJoonyoung Shim if (pdata) { 2112c7e6f57SJoonyoung Shim max8998->ono = pdata->ono; 2122c7e6f57SJoonyoung Shim max8998->irq_base = pdata->irq_base; 213cdd137c9SMyungJoo Ham max8998->wakeup = pdata->wakeup; 2142c7e6f57SJoonyoung Shim } 215156f2528SKyungmin Park mutex_init(&max8998->iolock); 216156f2528SKyungmin Park 2179b16c0a4SJoonyoung Shim max8998->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); 2189b16c0a4SJoonyoung Shim i2c_set_clientdata(max8998->rtc, max8998); 2199b16c0a4SJoonyoung Shim 2202c7e6f57SJoonyoung Shim max8998_irq_init(max8998); 2212c7e6f57SJoonyoung Shim 222337ce5d1SMyungJoo Ham pm_runtime_set_active(max8998->dev); 223337ce5d1SMyungJoo Ham 224ee999fb3STomasz Figa switch (max8998->type) { 225337ce5d1SMyungJoo Ham case TYPE_LP3974: 226337ce5d1SMyungJoo Ham ret = mfd_add_devices(max8998->dev, -1, 227337ce5d1SMyungJoo Ham lp3974_devs, ARRAY_SIZE(lp3974_devs), 2280848c94fSMark Brown NULL, 0, NULL); 229337ce5d1SMyungJoo Ham break; 230337ce5d1SMyungJoo Ham case TYPE_MAX8998: 231156f2528SKyungmin Park ret = mfd_add_devices(max8998->dev, -1, 232156f2528SKyungmin Park max8998_devs, ARRAY_SIZE(max8998_devs), 2330848c94fSMark Brown NULL, 0, NULL); 234337ce5d1SMyungJoo Ham break; 235337ce5d1SMyungJoo Ham default: 236337ce5d1SMyungJoo Ham ret = -EINVAL; 237337ce5d1SMyungJoo Ham } 238cdd137c9SMyungJoo Ham 239156f2528SKyungmin Park if (ret < 0) 240156f2528SKyungmin Park goto err; 241156f2528SKyungmin Park 2427ef73598SJonghwan Choi device_init_wakeup(max8998->dev, max8998->wakeup); 2437ef73598SJonghwan Choi 244156f2528SKyungmin Park return ret; 245156f2528SKyungmin Park 246156f2528SKyungmin Park err: 247156f2528SKyungmin Park mfd_remove_devices(max8998->dev); 2487484552eSAxel Lin max8998_irq_exit(max8998); 2497484552eSAxel Lin i2c_unregister_device(max8998->rtc); 250156f2528SKyungmin Park return ret; 251156f2528SKyungmin Park } 252156f2528SKyungmin Park 253156f2528SKyungmin Park static int max8998_i2c_remove(struct i2c_client *i2c) 254156f2528SKyungmin Park { 255156f2528SKyungmin Park struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 256156f2528SKyungmin Park 257156f2528SKyungmin Park mfd_remove_devices(max8998->dev); 2587484552eSAxel Lin max8998_irq_exit(max8998); 2597484552eSAxel Lin i2c_unregister_device(max8998->rtc); 260156f2528SKyungmin Park 261156f2528SKyungmin Park return 0; 262156f2528SKyungmin Park } 263156f2528SKyungmin Park 264156f2528SKyungmin Park static const struct i2c_device_id max8998_i2c_id[] = { 265509bd476SLukasz Majewski { "max8998", TYPE_MAX8998 }, 266509bd476SLukasz Majewski { "lp3974", TYPE_LP3974}, 267156f2528SKyungmin Park { } 268156f2528SKyungmin Park }; 269156f2528SKyungmin Park MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); 270156f2528SKyungmin Park 271cdd137c9SMyungJoo Ham static int max8998_suspend(struct device *dev) 272cdd137c9SMyungJoo Ham { 273cdd137c9SMyungJoo Ham struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 274cdd137c9SMyungJoo Ham struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 275cdd137c9SMyungJoo Ham 2767ef73598SJonghwan Choi if (device_may_wakeup(dev)) 277d5bb1221SThomas Gleixner irq_set_irq_wake(max8998->irq, 1); 278cdd137c9SMyungJoo Ham return 0; 279cdd137c9SMyungJoo Ham } 280cdd137c9SMyungJoo Ham 281cdd137c9SMyungJoo Ham static int max8998_resume(struct device *dev) 282cdd137c9SMyungJoo Ham { 283cdd137c9SMyungJoo Ham struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 284cdd137c9SMyungJoo Ham struct max8998_dev *max8998 = i2c_get_clientdata(i2c); 285cdd137c9SMyungJoo Ham 2867ef73598SJonghwan Choi if (device_may_wakeup(dev)) 287d5bb1221SThomas Gleixner irq_set_irq_wake(max8998->irq, 0); 288cdd137c9SMyungJoo Ham /* 289cdd137c9SMyungJoo Ham * In LP3974, if IRQ registers are not "read & clear" 290cdd137c9SMyungJoo Ham * when it's set during sleep, the interrupt becomes 291cdd137c9SMyungJoo Ham * disabled. 292cdd137c9SMyungJoo Ham */ 293cdd137c9SMyungJoo Ham return max8998_irq_resume(i2c_get_clientdata(i2c)); 294cdd137c9SMyungJoo Ham } 295cdd137c9SMyungJoo Ham 296cdd137c9SMyungJoo Ham struct max8998_reg_dump { 297cdd137c9SMyungJoo Ham u8 addr; 298cdd137c9SMyungJoo Ham u8 val; 299cdd137c9SMyungJoo Ham }; 300cdd137c9SMyungJoo Ham #define SAVE_ITEM(x) { .addr = (x), .val = 0x0, } 30144be0a40SMark Brown static struct max8998_reg_dump max8998_dump[] = { 302cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_IRQM1), 303cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_IRQM2), 304cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_IRQM3), 305cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_IRQM4), 306cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_STATUSM1), 307cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_STATUSM2), 308cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_CHGR1), 309cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_CHGR2), 310cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1), 311cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO_ACTIVE_DISCHARGE1), 312cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK_ACTIVE_DISCHARGE3), 313cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_ONOFF1), 314cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_ONOFF2), 315cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_ONOFF3), 316cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_ONOFF4), 317cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE1), 318cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE2), 319cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE3), 320cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK1_VOLTAGE4), 321cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE1), 322cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BUCK2_VOLTAGE2), 323cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO2_LDO3), 324cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO4), 325cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO5), 326cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO6), 327cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO7), 328cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO8_LDO9), 329cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO10_LDO11), 330cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO12), 331cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO13), 332cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO14), 333cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO15), 334cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO16), 335cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LDO17), 336cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_BKCHR), 337cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LBCNFG1), 338cdd137c9SMyungJoo Ham SAVE_ITEM(MAX8998_REG_LBCNFG2), 339cdd137c9SMyungJoo Ham }; 340cdd137c9SMyungJoo Ham /* Save registers before hibernation */ 341cdd137c9SMyungJoo Ham static int max8998_freeze(struct device *dev) 342cdd137c9SMyungJoo Ham { 343cdd137c9SMyungJoo Ham struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 344cdd137c9SMyungJoo Ham int i; 345cdd137c9SMyungJoo Ham 346cdd137c9SMyungJoo Ham for (i = 0; i < ARRAY_SIZE(max8998_dump); i++) 347cdd137c9SMyungJoo Ham max8998_read_reg(i2c, max8998_dump[i].addr, 348cdd137c9SMyungJoo Ham &max8998_dump[i].val); 349cdd137c9SMyungJoo Ham 350cdd137c9SMyungJoo Ham return 0; 351cdd137c9SMyungJoo Ham } 352cdd137c9SMyungJoo Ham 353cdd137c9SMyungJoo Ham /* Restore registers after hibernation */ 354cdd137c9SMyungJoo Ham static int max8998_restore(struct device *dev) 355cdd137c9SMyungJoo Ham { 356cdd137c9SMyungJoo Ham struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 357cdd137c9SMyungJoo Ham int i; 358cdd137c9SMyungJoo Ham 359cdd137c9SMyungJoo Ham for (i = 0; i < ARRAY_SIZE(max8998_dump); i++) 360cdd137c9SMyungJoo Ham max8998_write_reg(i2c, max8998_dump[i].addr, 361cdd137c9SMyungJoo Ham max8998_dump[i].val); 362cdd137c9SMyungJoo Ham 363cdd137c9SMyungJoo Ham return 0; 364cdd137c9SMyungJoo Ham } 365cdd137c9SMyungJoo Ham 36644be0a40SMark Brown static const struct dev_pm_ops max8998_pm = { 367cdd137c9SMyungJoo Ham .suspend = max8998_suspend, 368cdd137c9SMyungJoo Ham .resume = max8998_resume, 369cdd137c9SMyungJoo Ham .freeze = max8998_freeze, 370cdd137c9SMyungJoo Ham .restore = max8998_restore, 371cdd137c9SMyungJoo Ham }; 372cdd137c9SMyungJoo Ham 373156f2528SKyungmin Park static struct i2c_driver max8998_i2c_driver = { 374156f2528SKyungmin Park .driver = { 375156f2528SKyungmin Park .name = "max8998", 376156f2528SKyungmin Park .owner = THIS_MODULE, 377cdd137c9SMyungJoo Ham .pm = &max8998_pm, 378ee999fb3STomasz Figa .of_match_table = of_match_ptr(max8998_dt_match), 379156f2528SKyungmin Park }, 380156f2528SKyungmin Park .probe = max8998_i2c_probe, 381156f2528SKyungmin Park .remove = max8998_i2c_remove, 382156f2528SKyungmin Park .id_table = max8998_i2c_id, 383156f2528SKyungmin Park }; 384156f2528SKyungmin Park 385156f2528SKyungmin Park static int __init max8998_i2c_init(void) 386156f2528SKyungmin Park { 387156f2528SKyungmin Park return i2c_add_driver(&max8998_i2c_driver); 388156f2528SKyungmin Park } 389156f2528SKyungmin Park /* init early so consumer devices can complete system boot */ 390156f2528SKyungmin Park subsys_initcall(max8998_i2c_init); 391156f2528SKyungmin Park 392156f2528SKyungmin Park static void __exit max8998_i2c_exit(void) 393156f2528SKyungmin Park { 394156f2528SKyungmin Park i2c_del_driver(&max8998_i2c_driver); 395156f2528SKyungmin Park } 396156f2528SKyungmin Park module_exit(max8998_i2c_exit); 397156f2528SKyungmin Park 398156f2528SKyungmin Park MODULE_DESCRIPTION("MAXIM 8998 multi-function core driver"); 399156f2528SKyungmin Park MODULE_AUTHOR("Kyungmin Park <kyungmin.park@samsung.com>"); 400156f2528SKyungmin Park MODULE_LICENSE("GPL"); 401