/* * max77686.c - mfd core driver for the Maxim 8966 and 8997 * * Copyright (C) 2011 Samsung Electronics * MyungJoo Ham * * 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 max8998.c */ #include #include #include #include #include #include #include #include #define I2C_ADDR_PMIC (0x12 >> 1) #define I2C_ADDR_RTC (0x0C >> 1) static struct mfd_cell max77686_devs[] = { { .name = "max77686-pmic", }, { .name = "max77686-rtc", }, }; int max77686_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) { struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77686->iolock); ret = i2c_smbus_read_byte_data(i2c, reg); mutex_unlock(&max77686->iolock); if (ret < 0) return ret; ret &= 0xff; *dest = ret; return 0; } EXPORT_SYMBOL_GPL(max77686_read_reg); int max77686_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) { struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77686->iolock); ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); mutex_unlock(&max77686->iolock); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(max77686_bulk_read); int max77686_write_reg(struct i2c_client *i2c, u8 reg, u8 value) { struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77686->iolock); ret = i2c_smbus_write_byte_data(i2c, reg, value); mutex_unlock(&max77686->iolock); return ret; } EXPORT_SYMBOL_GPL(max77686_write_reg); int max77686_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) { struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77686->iolock); ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); mutex_unlock(&max77686->iolock); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(max77686_bulk_write); int max77686_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) { struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77686->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(&max77686->iolock); return ret; } EXPORT_SYMBOL_GPL(max77686_update_reg); static int max77686_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct max77686_dev *max77686; struct max77686_platform_data *pdata = i2c->dev.platform_data; int ret = 0; max77686 = kzalloc(sizeof(struct max77686_dev), GFP_KERNEL); if (max77686 == NULL) return -ENOMEM; i2c_set_clientdata(i2c, max77686); max77686->dev = &i2c->dev; max77686->i2c = i2c; max77686->type = id->driver_data; max77686->irq = i2c->irq; if (!pdata) goto err; max77686->irq_base = pdata->irq_base; max77686->ono = pdata->ono; mutex_init(&max77686->iolock); max77686->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC); i2c_set_clientdata(max77686->rtc, max77686); pm_runtime_set_active(max77686->dev); max77686_irq_init(max77686); mfd_add_devices(max77686->dev, -1, max77686_devs, ARRAY_SIZE(max77686_devs), NULL, 0); /* * TODO: enable others (flash, muic, rtc, battery, ...) and * check the return value */ if (ret < 0) goto err_mfd; /* MAX77686 has a power button input. */ device_init_wakeup(max77686->dev, pdata->wakeup); return ret; err_mfd: mfd_remove_devices(max77686->dev); i2c_unregister_device(max77686->rtc); err: kfree(max77686); return ret; } static int max77686_i2c_remove(struct i2c_client *i2c) { struct max77686_dev *max77686 = i2c_get_clientdata(i2c); mfd_remove_devices(max77686->dev); i2c_unregister_device(max77686->rtc); kfree(max77686); return 0; } static const struct i2c_device_id max77686_i2c_id[] = { { "max77686", 0 }, { } }; MODULE_DEVICE_TABLE(i2c, max8998_i2c_id); u8 max77686_dumpaddr_pmic[] = { MAX77686_REG_DEVICE_ID, MAX77686_REG_INTSRC, MAX77686_REG_INT1, MAX77686_REG_INT2, MAX77686_REG_INT1MSK, MAX77686_REG_INT2MSK, MAX77686_REG_STATUS1, MAX77686_REG_STATUS2, MAX77686_REG_PWRON, MAX77686_REG_ONOFFDELAY, MAX77686_REG_MRSTB, MAX77686_REG_BUCK1CTRL, MAX77686_REG_BUCK1OUT, MAX77686_REG_BUCK2CTRL1, MAX77686_REG_BUCK234FREQ, MAX77686_REG_BUCK2DVS1, MAX77686_REG_BUCK2DVS2, MAX77686_REG_BUCK2DVS3, MAX77686_REG_BUCK2DVS4, MAX77686_REG_BUCK2DVS5, MAX77686_REG_BUCK2DVS6, MAX77686_REG_BUCK2DVS7, MAX77686_REG_BUCK2DVS8, MAX77686_REG_BUCK3CTRL1, MAX77686_REG_BUCK3DVS1, MAX77686_REG_BUCK3DVS2, MAX77686_REG_BUCK3DVS3, MAX77686_REG_BUCK3DVS4, MAX77686_REG_BUCK3DVS5, MAX77686_REG_BUCK3DVS6, MAX77686_REG_BUCK3DVS7, MAX77686_REG_BUCK3DVS8, MAX77686_REG_BUCK4CTRL1, MAX77686_REG_BUCK4DVS1, MAX77686_REG_BUCK4DVS2, MAX77686_REG_BUCK4DVS3, MAX77686_REG_BUCK4DVS4, MAX77686_REG_BUCK4DVS5, MAX77686_REG_BUCK4DVS6, MAX77686_REG_BUCK4DVS7, MAX77686_REG_BUCK4DVS8, MAX77686_REG_BUCK5CTRL, MAX77686_REG_BUCK5OUT, MAX77686_REG_BUCK6CTRL, MAX77686_REG_BUCK6OUT, MAX77686_REG_BUCK7CTRL, MAX77686_REG_BUCK7OUT, MAX77686_REG_BUCK8CTRL, MAX77686_REG_BUCK8OUT, MAX77686_REG_BUCK9CTRL, MAX77686_REG_BUCK9OUT, MAX77686_REG_LDO1CTRL1, MAX77686_REG_LDO2CTRL1, MAX77686_REG_LDO3CTRL1, MAX77686_REG_LDO4CTRL1, MAX77686_REG_LDO5CTRL1, MAX77686_REG_LDO6CTRL1, MAX77686_REG_LDO7CTRL1, MAX77686_REG_LDO8CTRL1, MAX77686_REG_LDO9CTRL1, MAX77686_REG_LDO10CTRL1, MAX77686_REG_LDO11CTRL1, MAX77686_REG_LDO12CTRL1, MAX77686_REG_LDO13CTRL1, MAX77686_REG_LDO14CTRL1, MAX77686_REG_LDO15CTRL1, MAX77686_REG_LDO16CTRL1, MAX77686_REG_LDO17CTRL1, MAX77686_REG_LDO18CTRL1, MAX77686_REG_LDO19CTRL1, MAX77686_REG_LDO20CTRL1, MAX77686_REG_LDO21CTRL1, MAX77686_REG_LDO22CTRL1, MAX77686_REG_LDO23CTRL1, MAX77686_REG_LDO24CTRL1, MAX77686_REG_LDO25CTRL1, MAX77686_REG_LDO26CTRL1, MAX77686_REG_LDO1CTRL2, MAX77686_REG_LDO2CTRL2, MAX77686_REG_LDO3CTRL2, MAX77686_REG_LDO4CTRL2, MAX77686_REG_LDO5CTRL2, MAX77686_REG_LDO6CTRL2, MAX77686_REG_LDO7CTRL2, MAX77686_REG_LDO8CTRL2, MAX77686_REG_LDO9CTRL2, MAX77686_REG_LDO10CTRL2, MAX77686_REG_LDO11CTRL2, MAX77686_REG_LDO12CTRL2, MAX77686_REG_LDO13CTRL2, MAX77686_REG_LDO14CTRL2, MAX77686_REG_LDO15CTRL2, MAX77686_REG_LDO16CTRL2, MAX77686_REG_LDO17CTRL2, MAX77686_REG_LDO18CTRL2, MAX77686_REG_LDO19CTRL2, MAX77686_REG_LDO20CTRL2, MAX77686_REG_LDO21CTRL2, MAX77686_REG_LDO22CTRL2, MAX77686_REG_LDO23CTRL2, MAX77686_REG_LDO24CTRL2, MAX77686_REG_LDO25CTRL2, MAX77686_REG_LDO26CTRL2, MAX77686_REG_BBAT_CHARGER, MAX77686_REG_32KHZ, }; static int max77686_freeze(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int i; for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++) max77686_read_reg(i2c, max77686_dumpaddr_pmic[i], &max77686->reg_dump[i]); return 0; } static int max77686_restore(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77686_dev *max77686 = i2c_get_clientdata(i2c); int i; for (i = 0; i < ARRAY_SIZE(max77686_dumpaddr_pmic); i++) max77686_write_reg(i2c, max77686_dumpaddr_pmic[i], max77686->reg_dump[i]); return 0; } static int max77686_suspend(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77686_dev *max77686 = i2c_get_clientdata(i2c); if (device_may_wakeup(dev)) irq_set_irq_wake(max77686->irq, 1); return 0; } static int max77686_resume(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77686_dev *max77686 = i2c_get_clientdata(i2c); if (device_may_wakeup(dev)) irq_set_irq_wake(max77686->irq, 0); return max77686_irq_resume(max77686); } const struct dev_pm_ops max77686_pm = { .suspend = max77686_suspend, .resume = max77686_resume, .freeze = max77686_freeze, .restore = max77686_restore, }; static struct i2c_driver max77686_i2c_driver = { .driver = { .name = "max77686", .owner = THIS_MODULE, .pm = &max77686_pm, }, .probe = max77686_i2c_probe, .remove = max77686_i2c_remove, .id_table = max77686_i2c_id, }; static int __init max77686_i2c_init(void) { return i2c_add_driver(&max77686_i2c_driver); } /* init early so consumer devices can complete system boot */ subsys_initcall(max77686_i2c_init); static void __exit max77686_i2c_exit(void) { i2c_del_driver(&max77686_i2c_driver); } module_exit(max77686_i2c_exit); MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver"); MODULE_AUTHOR("MyungJoo Ham "); MODULE_LICENSE("GPL");