183871c00SChanwoo Choi /* 283871c00SChanwoo Choi * max77693.c - mfd core driver for the MAX 77693 383871c00SChanwoo Choi * 483871c00SChanwoo Choi * Copyright (C) 2012 Samsung Electronics 583871c00SChanwoo Choi * SangYoung Son <hello.son@smasung.com> 683871c00SChanwoo Choi * 783871c00SChanwoo Choi * This program is not provided / owned by Maxim Integrated Products. 883871c00SChanwoo Choi * 983871c00SChanwoo Choi * This program is free software; you can redistribute it and/or modify 1083871c00SChanwoo Choi * it under the terms of the GNU General Public License as published by 1183871c00SChanwoo Choi * the Free Software Foundation; either version 2 of the License, or 1283871c00SChanwoo Choi * (at your option) any later version. 1383871c00SChanwoo Choi * 1483871c00SChanwoo Choi * This program is distributed in the hope that it will be useful, 1583871c00SChanwoo Choi * but WITHOUT ANY WARRANTY; without even the implied warranty of 1683871c00SChanwoo Choi * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 1783871c00SChanwoo Choi * GNU General Public License for more details. 1883871c00SChanwoo Choi * 1983871c00SChanwoo Choi * You should have received a copy of the GNU General Public License 2083871c00SChanwoo Choi * along with this program; if not, write to the Free Software 2183871c00SChanwoo Choi * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 2283871c00SChanwoo Choi * 2383871c00SChanwoo Choi * This driver is based on max8997.c 2483871c00SChanwoo Choi */ 2583871c00SChanwoo Choi 2683871c00SChanwoo Choi #include <linux/module.h> 2783871c00SChanwoo Choi #include <linux/slab.h> 2883871c00SChanwoo Choi #include <linux/i2c.h> 2983871c00SChanwoo Choi #include <linux/err.h> 3083871c00SChanwoo Choi #include <linux/interrupt.h> 3183871c00SChanwoo Choi #include <linux/pm_runtime.h> 3283871c00SChanwoo Choi #include <linux/mutex.h> 3383871c00SChanwoo Choi #include <linux/mfd/core.h> 3483871c00SChanwoo Choi #include <linux/mfd/max77693.h> 3583871c00SChanwoo Choi #include <linux/mfd/max77693-private.h> 3683871c00SChanwoo Choi #include <linux/regulator/machine.h> 3783871c00SChanwoo Choi #include <linux/regmap.h> 3883871c00SChanwoo Choi 3983871c00SChanwoo Choi #define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */ 4083871c00SChanwoo Choi #define I2C_ADDR_MUIC (0x4A >> 1) 4183871c00SChanwoo Choi #define I2C_ADDR_HAPTIC (0x90 >> 1) 4283871c00SChanwoo Choi 4383871c00SChanwoo Choi static struct mfd_cell max77693_devs[] = { 4483871c00SChanwoo Choi { .name = "max77693-pmic", }, 4583871c00SChanwoo Choi { .name = "max77693-charger", }, 4683871c00SChanwoo Choi { .name = "max77693-flash", }, 4783871c00SChanwoo Choi { .name = "max77693-muic", }, 4883871c00SChanwoo Choi { .name = "max77693-haptic", }, 4983871c00SChanwoo Choi }; 5083871c00SChanwoo Choi 5183871c00SChanwoo Choi int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest) 5283871c00SChanwoo Choi { 5383871c00SChanwoo Choi unsigned int val; 5483871c00SChanwoo Choi int ret; 5583871c00SChanwoo Choi 5683871c00SChanwoo Choi ret = regmap_read(map, reg, &val); 5783871c00SChanwoo Choi *dest = val; 5883871c00SChanwoo Choi 5983871c00SChanwoo Choi return ret; 6083871c00SChanwoo Choi } 6183871c00SChanwoo Choi EXPORT_SYMBOL_GPL(max77693_read_reg); 6283871c00SChanwoo Choi 6383871c00SChanwoo Choi int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf) 6483871c00SChanwoo Choi { 6583871c00SChanwoo Choi int ret; 6683871c00SChanwoo Choi 6783871c00SChanwoo Choi ret = regmap_bulk_read(map, reg, buf, count); 6883871c00SChanwoo Choi 6983871c00SChanwoo Choi return ret; 7083871c00SChanwoo Choi } 7183871c00SChanwoo Choi EXPORT_SYMBOL_GPL(max77693_bulk_read); 7283871c00SChanwoo Choi 7383871c00SChanwoo Choi int max77693_write_reg(struct regmap *map, u8 reg, u8 value) 7483871c00SChanwoo Choi { 7583871c00SChanwoo Choi int ret; 7683871c00SChanwoo Choi 7783871c00SChanwoo Choi ret = regmap_write(map, reg, value); 7883871c00SChanwoo Choi 7983871c00SChanwoo Choi return ret; 8083871c00SChanwoo Choi } 8183871c00SChanwoo Choi EXPORT_SYMBOL_GPL(max77693_write_reg); 8283871c00SChanwoo Choi 8383871c00SChanwoo Choi int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf) 8483871c00SChanwoo Choi { 8583871c00SChanwoo Choi int ret; 8683871c00SChanwoo Choi 8783871c00SChanwoo Choi ret = regmap_bulk_write(map, reg, buf, count); 8883871c00SChanwoo Choi 8983871c00SChanwoo Choi return ret; 9083871c00SChanwoo Choi } 9183871c00SChanwoo Choi EXPORT_SYMBOL_GPL(max77693_bulk_write); 9283871c00SChanwoo Choi 9383871c00SChanwoo Choi int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask) 9483871c00SChanwoo Choi { 9583871c00SChanwoo Choi int ret; 9683871c00SChanwoo Choi 9783871c00SChanwoo Choi ret = regmap_update_bits(map, reg, mask, val); 9883871c00SChanwoo Choi 9983871c00SChanwoo Choi return ret; 10083871c00SChanwoo Choi } 10183871c00SChanwoo Choi EXPORT_SYMBOL_GPL(max77693_update_reg); 10283871c00SChanwoo Choi 10383871c00SChanwoo Choi static const struct regmap_config max77693_regmap_config = { 10483871c00SChanwoo Choi .reg_bits = 8, 10583871c00SChanwoo Choi .val_bits = 8, 10683871c00SChanwoo Choi .max_register = MAX77693_PMIC_REG_END, 10783871c00SChanwoo Choi }; 10883871c00SChanwoo Choi 10983871c00SChanwoo Choi static int max77693_i2c_probe(struct i2c_client *i2c, 11083871c00SChanwoo Choi const struct i2c_device_id *id) 11183871c00SChanwoo Choi { 11283871c00SChanwoo Choi struct max77693_dev *max77693; 11383871c00SChanwoo Choi u8 reg_data; 11483871c00SChanwoo Choi int ret = 0; 11583871c00SChanwoo Choi 11683871c00SChanwoo Choi max77693 = devm_kzalloc(&i2c->dev, 11783871c00SChanwoo Choi sizeof(struct max77693_dev), GFP_KERNEL); 11883871c00SChanwoo Choi if (max77693 == NULL) 11983871c00SChanwoo Choi return -ENOMEM; 12083871c00SChanwoo Choi 12183871c00SChanwoo Choi i2c_set_clientdata(i2c, max77693); 12283871c00SChanwoo Choi max77693->dev = &i2c->dev; 12383871c00SChanwoo Choi max77693->i2c = i2c; 12483871c00SChanwoo Choi max77693->irq = i2c->irq; 12583871c00SChanwoo Choi max77693->type = id->driver_data; 12683871c00SChanwoo Choi 1272429d863SAxel Lin max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); 1282429d863SAxel Lin if (IS_ERR(max77693->regmap)) { 1292429d863SAxel Lin ret = PTR_ERR(max77693->regmap); 1302429d863SAxel Lin dev_err(max77693->dev, "failed to allocate register map: %d\n", 1312429d863SAxel Lin ret); 1322429d863SAxel Lin return ret; 1332429d863SAxel Lin } 13483871c00SChanwoo Choi 1352429d863SAxel Lin ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, 1362429d863SAxel Lin ®_data); 1372429d863SAxel Lin if (ret < 0) { 13883871c00SChanwoo Choi dev_err(max77693->dev, "device not found on this channel\n"); 1392429d863SAxel Lin return ret; 14083871c00SChanwoo Choi } else 14183871c00SChanwoo Choi dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); 14283871c00SChanwoo Choi 14383871c00SChanwoo Choi max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); 14483871c00SChanwoo Choi i2c_set_clientdata(max77693->muic, max77693); 14583871c00SChanwoo Choi 14683871c00SChanwoo Choi max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); 14783871c00SChanwoo Choi i2c_set_clientdata(max77693->haptic, max77693); 14883871c00SChanwoo Choi 149b186b124SChanwoo Choi /* 150b186b124SChanwoo Choi * Initialize register map for MUIC device because use regmap-muic 151b186b124SChanwoo Choi * instance of MUIC device when irq of max77693 is initialized 152b186b124SChanwoo Choi * before call max77693-muic probe() function. 153b186b124SChanwoo Choi */ 154b186b124SChanwoo Choi max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, 155b186b124SChanwoo Choi &max77693_regmap_config); 156b186b124SChanwoo Choi if (IS_ERR(max77693->regmap_muic)) { 157b186b124SChanwoo Choi ret = PTR_ERR(max77693->regmap_muic); 158b186b124SChanwoo Choi dev_err(max77693->dev, 159b186b124SChanwoo Choi "failed to allocate register map: %d\n", ret); 1602429d863SAxel Lin goto err_regmap_muic; 161b186b124SChanwoo Choi } 162b186b124SChanwoo Choi 1636592ebb3SChanwoo Choi ret = max77693_irq_init(max77693); 1646592ebb3SChanwoo Choi if (ret < 0) 165ff2b7ac6SAxel Lin goto err_irq; 1666592ebb3SChanwoo Choi 16783871c00SChanwoo Choi pm_runtime_set_active(max77693->dev); 16883871c00SChanwoo Choi 16983871c00SChanwoo Choi ret = mfd_add_devices(max77693->dev, -1, max77693_devs, 1700848c94fSMark Brown ARRAY_SIZE(max77693_devs), NULL, 0, NULL); 17183871c00SChanwoo Choi if (ret < 0) 17283871c00SChanwoo Choi goto err_mfd; 17383871c00SChanwoo Choi 17483871c00SChanwoo Choi return ret; 17583871c00SChanwoo Choi 17683871c00SChanwoo Choi err_mfd: 177ff2b7ac6SAxel Lin max77693_irq_exit(max77693); 178ff2b7ac6SAxel Lin err_irq: 1792429d863SAxel Lin err_regmap_muic: 18083871c00SChanwoo Choi i2c_unregister_device(max77693->muic); 18183871c00SChanwoo Choi i2c_unregister_device(max77693->haptic); 18283871c00SChanwoo Choi return ret; 18383871c00SChanwoo Choi } 18483871c00SChanwoo Choi 18583871c00SChanwoo Choi static int max77693_i2c_remove(struct i2c_client *i2c) 18683871c00SChanwoo Choi { 18783871c00SChanwoo Choi struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 18883871c00SChanwoo Choi 18983871c00SChanwoo Choi mfd_remove_devices(max77693->dev); 190ff2b7ac6SAxel Lin max77693_irq_exit(max77693); 19183871c00SChanwoo Choi i2c_unregister_device(max77693->muic); 19283871c00SChanwoo Choi i2c_unregister_device(max77693->haptic); 19383871c00SChanwoo Choi 19483871c00SChanwoo Choi return 0; 19583871c00SChanwoo Choi } 19683871c00SChanwoo Choi 19783871c00SChanwoo Choi static const struct i2c_device_id max77693_i2c_id[] = { 19883871c00SChanwoo Choi { "max77693", TYPE_MAX77693 }, 19983871c00SChanwoo Choi { } 20083871c00SChanwoo Choi }; 20183871c00SChanwoo Choi MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); 20283871c00SChanwoo Choi 2036592ebb3SChanwoo Choi static int max77693_suspend(struct device *dev) 2046592ebb3SChanwoo Choi { 2056592ebb3SChanwoo Choi struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 2066592ebb3SChanwoo Choi struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 2076592ebb3SChanwoo Choi 2086592ebb3SChanwoo Choi if (device_may_wakeup(dev)) 2096592ebb3SChanwoo Choi irq_set_irq_wake(max77693->irq, 1); 2106592ebb3SChanwoo Choi return 0; 2116592ebb3SChanwoo Choi } 2126592ebb3SChanwoo Choi 2136592ebb3SChanwoo Choi static int max77693_resume(struct device *dev) 2146592ebb3SChanwoo Choi { 2156592ebb3SChanwoo Choi struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); 2166592ebb3SChanwoo Choi struct max77693_dev *max77693 = i2c_get_clientdata(i2c); 2176592ebb3SChanwoo Choi 2186592ebb3SChanwoo Choi if (device_may_wakeup(dev)) 2196592ebb3SChanwoo Choi irq_set_irq_wake(max77693->irq, 0); 2206592ebb3SChanwoo Choi return max77693_irq_resume(max77693); 2216592ebb3SChanwoo Choi } 2226592ebb3SChanwoo Choi 22312477a32SMark Brown static const struct dev_pm_ops max77693_pm = { 2246592ebb3SChanwoo Choi .suspend = max77693_suspend, 2256592ebb3SChanwoo Choi .resume = max77693_resume, 2266592ebb3SChanwoo Choi }; 2276592ebb3SChanwoo Choi 2284657185cSAndrzej Hajda #ifdef CONFIG_OF 2294657185cSAndrzej Hajda static struct of_device_id max77693_dt_match[] = { 2304657185cSAndrzej Hajda { .compatible = "maxim,max77693" }, 2314657185cSAndrzej Hajda {}, 2324657185cSAndrzej Hajda }; 2334657185cSAndrzej Hajda #endif 2344657185cSAndrzej Hajda 23583871c00SChanwoo Choi static struct i2c_driver max77693_i2c_driver = { 23683871c00SChanwoo Choi .driver = { 23783871c00SChanwoo Choi .name = "max77693", 23883871c00SChanwoo Choi .owner = THIS_MODULE, 2396592ebb3SChanwoo Choi .pm = &max77693_pm, 2404657185cSAndrzej Hajda .of_match_table = of_match_ptr(max77693_dt_match), 24183871c00SChanwoo Choi }, 24283871c00SChanwoo Choi .probe = max77693_i2c_probe, 24383871c00SChanwoo Choi .remove = max77693_i2c_remove, 24483871c00SChanwoo Choi .id_table = max77693_i2c_id, 24583871c00SChanwoo Choi }; 24683871c00SChanwoo Choi 24783871c00SChanwoo Choi static int __init max77693_i2c_init(void) 24883871c00SChanwoo Choi { 24983871c00SChanwoo Choi return i2c_add_driver(&max77693_i2c_driver); 25083871c00SChanwoo Choi } 25183871c00SChanwoo Choi /* init early so consumer devices can complete system boot */ 25283871c00SChanwoo Choi subsys_initcall(max77693_i2c_init); 25383871c00SChanwoo Choi 25483871c00SChanwoo Choi static void __exit max77693_i2c_exit(void) 25583871c00SChanwoo Choi { 25683871c00SChanwoo Choi i2c_del_driver(&max77693_i2c_driver); 25783871c00SChanwoo Choi } 25883871c00SChanwoo Choi module_exit(max77693_i2c_exit); 25983871c00SChanwoo Choi 26083871c00SChanwoo Choi MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); 26183871c00SChanwoo Choi MODULE_AUTHOR("SangYoung, Son <hello.son@samsung.com>"); 26283871c00SChanwoo Choi MODULE_LICENSE("GPL"); 263