/* * max77693.c - mfd core driver for the Maxim 77693 * * Copyright (C) 2011 Samsung Electronics * SangYoung Son * * 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 #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-charger", }, { .name = "max77693-led", }, { .name = "max77693-muic", }, { .name = "max77693-safeout", }, { .name = "max77693-haptic", }, }; int max77693_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77693->iolock); ret = i2c_smbus_read_byte_data(i2c, reg); mutex_unlock(&max77693->iolock); if (ret < 0) return ret; ret &= 0xff; *dest = ret; return 0; } EXPORT_SYMBOL_GPL(max77693_read_reg); int max77693_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77693->iolock); ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf); mutex_unlock(&max77693->iolock); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(max77693_bulk_read); int max77693_write_reg(struct i2c_client *i2c, u8 reg, u8 value) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77693->iolock); ret = i2c_smbus_write_byte_data(i2c, reg, value); mutex_unlock(&max77693->iolock); return ret; } EXPORT_SYMBOL_GPL(max77693_write_reg); int max77693_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77693->iolock); ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf); mutex_unlock(&max77693->iolock); if (ret < 0) return ret; return 0; } EXPORT_SYMBOL_GPL(max77693_bulk_write); int max77693_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int ret; mutex_lock(&max77693->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(&max77693->iolock); return ret; } EXPORT_SYMBOL_GPL(max77693_update_reg); static int max77693_i2c_probe(struct i2c_client *i2c, const struct i2c_device_id *id) { struct max77693_dev *max77693; struct max77693_platform_data *pdata = i2c->dev.platform_data; u8 reg_data; int ret = 0; max77693 = kzalloc(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; if (pdata) { max77693->irq_base = pdata->irq_base; max77693->irq_gpio = pdata->irq_gpio; max77693->wakeup = pdata->wakeup; } else { ret = -EIO; goto err; } mutex_init(&max77693->iolock); if (max77693_read_reg(i2c, MAX77693_PMIC_REG_PMIC_ID2, ®_data) < 0) { dev_err(max77693->dev, "device not found on this channel (this is not an error)\n"); ret = -ENODEV; goto err; } else { /* print rev */ max77693->pmic_rev = (reg_data & 0x7); max77693->pmic_ver = ((reg_data & 0xF8) >> 0x3); pr_info("%s: device found: rev.0x%x, ver.0x%x\n", __func__, max77693->pmic_rev, max77693->pmic_ver); } 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); ret = max77693_irq_init(max77693); if (ret < 0) goto err_irq_init; ret = mfd_add_devices(max77693->dev, -1, max77693_devs, ARRAY_SIZE(max77693_devs), NULL, 0); if (ret < 0) goto err_mfd; device_init_wakeup(max77693->dev, pdata->wakeup); return ret; err_mfd: mfd_remove_devices(max77693->dev); err_irq_init: i2c_unregister_device(max77693->muic); i2c_unregister_device(max77693->haptic); err: kfree(max77693); return ret; } static int max77693_i2c_remove(struct i2c_client *i2c) { struct max77693_dev *max77693 = i2c_get_clientdata(i2c); mfd_remove_devices(max77693->dev); i2c_unregister_device(max77693->muic); i2c_unregister_device(max77693->haptic); kfree(max77693); return 0; } static const struct i2c_device_id max77693_i2c_id[] = { { "max77693", TYPE_MAX77693 }, { } }; MODULE_DEVICE_TABLE(i2c, max77693_i2c_id); #ifdef CONFIG_PM 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)) enable_irq_wake(max77693->irq); 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)) disable_irq_wake(max77693->irq); return max77693_irq_resume(max77693); } #else #define max77693_suspend NULL #define max77693_resume NULL #endif /* CONFIG_PM */ #ifdef CONFIG_HIBERNATION u8 max77693_dumpaddr_pmic[] = { MAX77693_LED_REG_IFLASH1, MAX77693_LED_REG_IFLASH2, MAX77693_LED_REG_ITORCH, MAX77693_LED_REG_ITORCHTORCHTIMER, MAX77693_LED_REG_FLASH_TIMER, MAX77693_LED_REG_FLASH_EN, MAX77693_LED_REG_MAX_FLASH1, MAX77693_LED_REG_MAX_FLASH2, MAX77693_LED_REG_VOUT_CNTL, MAX77693_LED_REG_VOUT_FLASH1, MAX77693_LED_REG_FLASH_INT_STATUS, MAX77693_PMIC_REG_TOPSYS_INT_MASK, MAX77693_PMIC_REG_MAINCTRL1, MAX77693_PMIC_REG_LSCNFG, MAX77693_CHG_REG_CHG_INT_MASK, MAX77693_CHG_REG_CHG_CNFG_00, MAX77693_CHG_REG_CHG_CNFG_01, MAX77693_CHG_REG_CHG_CNFG_02, MAX77693_CHG_REG_CHG_CNFG_03, MAX77693_CHG_REG_CHG_CNFG_04, MAX77693_CHG_REG_CHG_CNFG_05, MAX77693_CHG_REG_CHG_CNFG_06, MAX77693_CHG_REG_CHG_CNFG_07, MAX77693_CHG_REG_CHG_CNFG_08, MAX77693_CHG_REG_CHG_CNFG_09, MAX77693_CHG_REG_CHG_CNFG_10, MAX77693_CHG_REG_CHG_CNFG_11, MAX77693_CHG_REG_CHG_CNFG_12, MAX77693_CHG_REG_CHG_CNFG_13, MAX77693_CHG_REG_CHG_CNFG_14, MAX77693_CHG_REG_SAFEOUT_CTRL, }; u8 max77693_dumpaddr_muic[] = { MAX77693_MUIC_REG_INTMASK1, MAX77693_MUIC_REG_INTMASK2, MAX77693_MUIC_REG_INTMASK3, MAX77693_MUIC_REG_CDETCTRL1, MAX77693_MUIC_REG_CDETCTRL2, MAX77693_MUIC_REG_CTRL1, MAX77693_MUIC_REG_CTRL2, MAX77693_MUIC_REG_CTRL3, }; u8 max77693_dumpaddr_haptic[] = { MAX77693_HAPTIC_REG_CONFIG1, MAX77693_HAPTIC_REG_CONFIG2, MAX77693_HAPTIC_REG_CONFIG_CHNL, MAX77693_HAPTIC_REG_CONFG_CYC1, MAX77693_HAPTIC_REG_CONFG_CYC2, MAX77693_HAPTIC_REG_CONFIG_PER1, MAX77693_HAPTIC_REG_CONFIG_PER2, MAX77693_HAPTIC_REG_CONFIG_PER3, MAX77693_HAPTIC_REG_CONFIG_PER4, MAX77693_HAPTIC_REG_CONFIG_DUTY1, MAX77693_HAPTIC_REG_CONFIG_DUTY2, MAX77693_HAPTIC_REG_CONFIG_PWM1, MAX77693_HAPTIC_REG_CONFIG_PWM2, MAX77693_HAPTIC_REG_CONFIG_PWM3, MAX77693_HAPTIC_REG_CONFIG_PWM4, }; static int max77693_freeze(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int i; for (i = 0; i < ARRAY_SIZE(max77693_dumpaddr_pmic); i++) max77693_read_reg(i2c, max77693_dumpaddr_pmic[i], &max77693->reg_pmic_dump[i]); for (i = 0; i < ARRAY_SIZE(max77693_dumpaddr_muic); i++) max77693_read_reg(i2c, max77693_dumpaddr_muic[i], &max77693->reg_muic_dump[i]); for (i = 0; i < ARRAY_SIZE(max77693_dumpaddr_haptic); i++) max77693_read_reg(i2c, max77693_dumpaddr_haptic[i], &max77693->reg_haptic_dump[i]); disable_irq(max77693->irq); return 0; } static int max77693_restore(struct device *dev) { struct i2c_client *i2c = container_of(dev, struct i2c_client, dev); struct max77693_dev *max77693 = i2c_get_clientdata(i2c); int i; enable_irq(max77693->irq); for (i = 0; i < ARRAY_SIZE(max77693_dumpaddr_pmic); i++) max77693_write_reg(i2c, max77693_dumpaddr_pmic[i], max77693->reg_pmic_dump[i]); for (i = 0; i < ARRAY_SIZE(max77693_dumpaddr_muic); i++) max77693_write_reg(i2c, max77693_dumpaddr_muic[i], max77693->reg_muic_dump[i]); for (i = 0; i < ARRAY_SIZE(max77693_dumpaddr_haptic); i++) max77693_write_reg(i2c, max77693_dumpaddr_haptic[i], max77693->reg_haptic_dump[i]); return 0; } #endif const struct dev_pm_ops max77693_pm = { .suspend = max77693_suspend, .resume = max77693_resume, #ifdef CONFIG_HIBERNATION .freeze = max77693_freeze, .thaw = max77693_restore, .restore = max77693_restore, #endif }; static struct i2c_driver max77693_i2c_driver = { .driver = { .name = "max77693", .owner = THIS_MODULE, .pm = &max77693_pm, }, .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");