/* * max8997.c - mfd core driver for the Maxim 8997 * * Copyright (C) 2009-2010 Samsung Electronics * * based on max8998.c * * 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 */ #include #include #include #include #include #include #include #include #include #include #define RTC_I2C_ADDR (0x0c >> 1) #define MUIC_I2C_ADDR (0x4a >> 1) #define HMOTOR_I2C_ADDR (0x90 >> 1) static struct mfd_cell max8997_devs[] = { { .name = "max8997-pmic", }, { .name = "max8997-charger", }, { .name = "max8997-rtc", }, { .name = "max8997-muic", }, { .name = "max8997-hapticmotor", }, }; int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max8997->iolock); ret = i2c_smbus_read_byte_data(i2c, reg); mutex_unlock(&max8997->iolock); if (ret < 0) return ret; ret &= 0xff; *dest = ret; return 0; } EXPORT_SYMBOL(max8997_read_reg); int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max8997->iolock); ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); mutex_unlock(&max8997->iolock); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL(max8997_bulk_read); int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max8997->iolock); ret = i2c_smbus_write_byte_data(i2c, reg, value); mutex_unlock(&max8997->iolock); return ret; } EXPORT_SYMBOL(max8997_write_reg); int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max8997->iolock); ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); mutex_unlock(&max8997->iolock); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL(max8997_bulk_write); int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max8997->iolock); ret = i2c_smbus_read_byte_data(i2c, reg); if (ret >= 0) { u8 old_val = ret & 0xff; u8 new_val = (val & mask) | (old_val & (~mask)); ret = i2c_smbus_write_byte_data(i2c, reg, new_val); } mutex_unlock(&max8997->iolock); return ret; } EXPORT_SYMBOL(max8997_update_reg); static int max8997_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct max8997_platform_data *pdata = i2c->dev.platform_data; struct max8997_dev *max8997; int ret = 0; max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL); if (max8997 == NULL) return -ENOMEM; i2c_set_clientdata(i2c, max8997); max8997->dev = &i2c->dev; max8997->i2c = i2c; max8997->irq = i2c->irq; max8997->type = id->driver_data; if (pdata) { max8997->ono = pdata->ono; max8997->irq_base = pdata->irq_base; max8997->wakeup = pdata->wakeup; } mutex_init(&max8997->iolock); max8997->rtc = i2c_new_dummy(i2c->adapter, RTC_I2C_ADDR); i2c_set_clientdata(max8997->rtc, max8997); max8997->muic = i2c_new_dummy(i2c->adapter, MUIC_I2C_ADDR); i2c_set_clientdata(max8997->muic, max8997); max8997->hmotor = i2c_new_dummy(i2c->adapter, HMOTOR_I2C_ADDR); i2c_set_clientdata(max8997->hmotor, max8997); max8997_irq_init(max8997); ret = mfd_add_devices(max8997->dev, -1, max8997_devs, ARRAY_SIZE(max8997_devs), NULL, 0); if (ret < 0) goto err; return ret; err: mfd_remove_devices(max8997->dev); max8997_irq_exit(max8997); i2c_unregister_device(max8997->rtc); kfree(max8997); return ret; } static int max8997_i2c_remove(struct i2c_client *i2c) { struct max8997_dev *max8997 = i2c_get_clientdata(i2c); mfd_remove_devices(max8997->dev); max8997_irq_exit(max8997); i2c_unregister_device(max8997->rtc); kfree(max8997); return 0; } static const struct i2c_device_id max8997_i2c_id[] = { { "max8997", TYPE_MAX8997 }, { } }; MODULE_DEVICE_TABLE(i2c, max8997_i2c_id); #ifdef CONFIG_PM static int max8997_suspend(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max8997_dev *max8997 = i2c_get_clientdata(i2c); if (max8997->wakeup) enable_irq_wake(max8997->irq); disable_irq(max8997->irq); return 0; } static int max8997_resume(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max8997_dev *max8997 = i2c_get_clientdata(i2c); if (max8997->wakeup) disable_irq_wake(max8997->irq); enable_irq(max8997->irq); return 0; } #else #define max8997_suspend NULL #define max8997_resume NULL #endif /* CONFIG_PM */ const struct dev_pm_ops max8997_pm = { .suspend = max8997_suspend, .resume = max8997_resume, }; static struct i2c_driver max8997_i2c_driver = { .driver = { .name = "max8997", .owner = THIS_MODULE, .pm = &max8997_pm, }, .probe = max8997_i2c_probe, .remove = max8997_i2c_remove, .id_table = max8997_i2c_id, }; static int __init max8997_i2c_init(void) { return i2c_add_driver(&max8997_i2c_driver); } /* init early so consumer devices can complete system boot */ subsys_initcall(max8997_i2c_init); static void __exit max8997_i2c_exit(void) { i2c_del_driver(&max8997_i2c_driver); } module_exit(max8997_i2c_exit); MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver"); MODULE_AUTHOR(""); MODULE_LICENSE("GPL");