diff options
Diffstat (limited to 'drivers/mfd/max77693.c')
| -rw-r--r-- | drivers/mfd/max77693.c | 390 |
1 files changed, 390 insertions, 0 deletions
diff --git a/drivers/mfd/max77693.c b/drivers/mfd/max77693.c new file mode 100644 index 0000000..ee13340 --- /dev/null +++ b/drivers/mfd/max77693.c @@ -0,0 +1,390 @@ +/* + * max77693.c - mfd core driver for the Maxim 77693 + * + * Copyright (C) 2011 Samsung Electronics + * SangYoung Son <hello.son@smasung.com> + * + * 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 <linux/slab.h> +#include <linux/i2c.h> +#include <linux/interrupt.h> +#include <linux/mutex.h> +#include <linux/mfd/core.h> +#include <linux/mfd/max77693.h> +#include <linux/mfd/max77693-private.h> +#include <linux/regulator/machine.h> + +#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 + 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_mfd; + + 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); + 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); + + disable_irq(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); + + enable_irq(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 <hello.son@samsung.com>"); +MODULE_LICENSE("GPL"); |