/* * max77693.c - mfd core driver for the MAX 77693 * * Copyright (C) 2012 Samsung Electronics * SangYoung Son * * This program is not provided / owned by Maxim Integrated Products. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * This driver is based on max8997.c */ #include #include #include #include #include #include #include #include #include #include #include #include #define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */ #define I2C_ADDR_MUIC (0x4A >> 1) #define I2C_ADDR_HAPTIC (0x90 >> 1) static struct mfd_cell max77693_devs[] = { { .name = "max77693-pmic", }, { .name = "max77693-charger", }, { .name = "max77693-flash", }, { .name = "max77693-muic", }, { .name = "max77693-haptic", }, }; int max77693_read_reg(struct regmap *map, u8 reg, u8 *dest) { unsigned int val; int ret; ret = regmap_read(map, reg, &val); *dest = val; return ret; } EXPORT_SYMBOL_GPL(max77693_read_reg); int max77693_bulk_read(struct regmap *map, u8 reg, int count, u8 *buf) { int ret; ret = regmap_bulk_read(map, reg, buf, count); return ret; } EXPORT_SYMBOL_GPL(max77693_bulk_read); int max77693_write_reg(struct regmap *map, u8 reg, u8 value) { int ret; ret = regmap_write(map, reg, value); return ret; } EXPORT_SYMBOL_GPL(max77693_write_reg); int max77693_bulk_write(struct regmap *map, u8 reg, int count, u8 *buf) { int ret; ret = regmap_bulk_write(map, reg, buf, count); return ret; } EXPORT_SYMBOL_GPL(max77693_bulk_write); int max77693_update_reg(struct regmap *map, u8 reg, u8 val, u8 mask) { int ret; ret = regmap_update_bits(map, reg, mask, val); return ret; } EXPORT_SYMBOL_GPL(max77693_update_reg); static const struct regmap_config max77693_regmap_config = { .reg_bits = 8, .val_bits = 8, .max_register = MAX77693_PMIC_REG_END, }; static int max77693_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct max77693_dev *max77693; u8 reg_data; int ret = 0; max77693 = devm_kzalloc(&i2c->dev, sizeof(struct max77693_dev), GFP_KERNEL); if (max77693 == NULL) return -ENOMEM; i2c_set_clientdata(i2c, max77693); max77693->dev = &i2c->dev; max77693->i2c = i2c; max77693->irq = i2c->irq; max77693->type = id->driver_data; max77693->regmap = devm_regmap_init_i2c(i2c, &max77693_regmap_config); if (IS_ERR(max77693->regmap)) { ret = PTR_ERR(max77693->regmap); dev_err(max77693->dev, "failed to allocate register map: %d\n", ret); return ret; } ret = max77693_read_reg(max77693->regmap, MAX77693_PMIC_REG_PMIC_ID2, ®_data); if (ret < 0) { dev_err(max77693->dev, "device not found on this channel\n"); return ret; } else dev_info(max77693->dev, "device ID: 0x%x\n", reg_data); max77693->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC); i2c_set_clientdata(max77693->muic, max77693); max77693->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC); i2c_set_clientdata(max77693->haptic, max77693); /* * Initialize register map for MUIC device because use regmap-muic * instance of MUIC device when irq of max77693 is initialized * before call max77693-muic probe() function. */ max77693->regmap_muic = devm_regmap_init_i2c(max77693->muic, &max77693_regmap_config); if (IS_ERR(max77693->regmap_muic)) { ret = PTR_ERR(max77693->regmap_muic); dev_err(max77693->dev, "failed to allocate register map: %d\n", ret); goto err_regmap_muic; } ret = max77693_irq_init(max77693); if (ret < 0) goto err_irq; pm_runtime_set_active(max77693->dev); ret = mfd_add_devices(max77693->dev, -1, max77693_devs, ARRAY_SIZE(max77693_devs), NULL, 0, NULL); if (ret < 0) goto err_mfd; return ret; err_mfd: max77693_irq_exit(max77693); err_irq: err_regmap_muic: i2c_unregister_device(max77693->muic); i2c_unregister_device(max77693->haptic); return ret; } static int max77693_i2c_remove(struct i2c_client *i2c) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); mfd_remove_devices(max77693->dev); max77693_irq_exit(max77693); i2c_unregister_device(max77693->muic); i2c_unregister_device(max77693->haptic); return 0; } static const struct i2c_device_id max77693_i2c_id[] = { { "max77693", TYPE_MAX77693 }, { } }; MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); static int max77693_suspend(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77693_dev *max77693 = i2c_get_clientdata(i2c); if (device_may_wakeup(dev)) irq_set_irq_wake(max77693->irq, 1); return 0; } static int max77693_resume(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77693_dev *max77693 = i2c_get_clientdata(i2c); if (device_may_wakeup(dev)) irq_set_irq_wake(max77693->irq, 0); return max77693_irq_resume(max77693); } static const struct dev_pm_ops max77693_pm = { .suspend = max77693_suspend, .resume = max77693_resume, }; #ifdef CONFIG_OF static struct of_device_id max77693_dt_match[] = { { .compatible = "maxim,max77693" }, {}, }; #endif static struct i2c_driver max77693_i2c_driver = { .driver = { .name = "max77693", .owner = THIS_MODULE, .pm = &max77693_pm, .of_match_table = of_match_ptr(max77693_dt_match), }, .probe = max77693_i2c_probe, .remove = max77693_i2c_remove, .id_table = max77693_i2c_id, }; static int __init max77693_i2c_init(void) { return i2c_add_driver(&max77693_i2c_driver); } /* init early so consumer devices can complete system boot */ subsys_initcall(max77693_i2c_init); static void __exit max77693_i2c_exit(void) { i2c_del_driver(&max77693_i2c_driver); } module_exit(max77693_i2c_exit); MODULE_DESCRIPTION("MAXIM 77693 multi-function core driver"); MODULE_AUTHOR("SangYoung, Son "); MODULE_LICENSE("GPL");