/*
* max77693.c - mfd core driver for the MAX 77693
*
* Copyright (C) 2012 Samsung Electronics
* SangYoung Son <hello.son@smasung.com>
*
* 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 <linux/module.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/pm_runtime.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>
#include <linux/regmap.h>
#define I2C_ADDR_PMIC (0xCC >> 1) /* Charger, Flash LED */
#define I2C_ADDR_MUIC (0x4A >> 1)
#define I2C_ADDR_HAPTIC (0x90 >> 1)
static const 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 const struct regmap_config max77693_regmap_muic_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77693_MUIC_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_muic_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 <hello.son@samsung.com>");
MODULE_LICENSE("GPL");
