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/*
* MFD core driver for the Maxim MAX77843
*
* Copyright (C) 2015 Samsung Electronics
* Author: Jaewon Kim <jaewon02.kim@samsung.com>
* Author: Beomho Seo <beomho.seo@samsung.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.
*/
#include <linux/err.h>
#include <linux/i2c.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max77693-common.h>
#include <linux/mfd/max77843-private.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
static const struct mfd_cell max77843_devs[] = {
{
.name = "max77843-muic",
.of_compatible = "maxim,max77843-muic",
}, {
.name = "max77843-regulator",
.of_compatible = "maxim,max77843-regulator",
}, {
.name = "max77843-charger",
.of_compatible = "maxim,max77843-charger"
}, {
.name = "max77843-fuelgauge",
.of_compatible = "maxim,max77843-fuelgauge",
}, {
.name = "max77843-haptic",
.of_compatible = "maxim,max77843-haptic",
},
};
static const struct regmap_config max77843_charger_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77843_CHG_REG_END,
};
static const struct regmap_config max77843_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = MAX77843_SYS_REG_END,
};
static const struct regmap_irq max77843_irqs[] = {
/* TOPSYS interrupts */
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSUVLO_INT, },
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_SYSOVLO_INT, },
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TSHDN_INT, },
{ .reg_offset = 0, .mask = MAX77843_SYS_IRQ_TM_INT, },
};
static const struct regmap_irq_chip max77843_irq_chip = {
.name = "max77843",
.status_base = MAX77843_SYS_REG_SYSINTSRC,
.mask_base = MAX77843_SYS_REG_SYSINTMASK,
.mask_invert = false,
.num_regs = 1,
.irqs = max77843_irqs,
.num_irqs = ARRAY_SIZE(max77843_irqs),
};
/* Charger and Charger regulator use same regmap. */
static int max77843_chg_init(struct max77693_dev *max77843)
{
int ret;
max77843->i2c_chg = i2c_new_dummy(max77843->i2c->adapter, I2C_ADDR_CHG);
if (!max77843->i2c_chg) {
dev_err(&max77843->i2c->dev,
"Cannot allocate I2C device for Charger\n");
return -ENODEV;
}
i2c_set_clientdata(max77843->i2c_chg, max77843);
max77843->regmap_chg = devm_regmap_init_i2c(max77843->i2c_chg,
&max77843_charger_regmap_config);
if (IS_ERR(max77843->regmap_chg)) {
ret = PTR_ERR(max77843->regmap_chg);
goto err_chg_i2c;
}
return 0;
err_chg_i2c:
i2c_unregister_device(max77843->i2c_chg);
return ret;
}
static int max77843_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max77693_dev *max77843;
unsigned int reg_data;
int ret;
max77843 = devm_kzalloc(&i2c->dev, sizeof(*max77843), GFP_KERNEL);
if (!max77843)
return -ENOMEM;
i2c_set_clientdata(i2c, max77843);
max77843->dev = &i2c->dev;
max77843->i2c = i2c;
max77843->irq = i2c->irq;
max77843->type = id->driver_data;
max77843->regmap = devm_regmap_init_i2c(i2c,
&max77843_regmap_config);
if (IS_ERR(max77843->regmap)) {
dev_err(&i2c->dev, "Failed to allocate topsys register map\n");
return PTR_ERR(max77843->regmap);
}
ret = regmap_add_irq_chip(max77843->regmap, max77843->irq,
IRQF_TRIGGER_LOW | IRQF_ONESHOT | IRQF_SHARED,
0, &max77843_irq_chip, &max77843->irq_data_topsys);
if (ret) {
dev_err(&i2c->dev, "Failed to add TOPSYS IRQ chip\n");
return ret;
}
ret = regmap_read(max77843->regmap,
MAX77843_SYS_REG_PMICID, ®_data);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to read PMIC ID\n");
goto err_pmic_id;
}
dev_info(&i2c->dev, "device ID: 0x%x\n", reg_data);
ret = max77843_chg_init(max77843);
if (ret) {
dev_err(&i2c->dev, "Failed to init Charger\n");
goto err_pmic_id;
}
ret = regmap_update_bits(max77843->regmap,
MAX77843_SYS_REG_INTSRCMASK,
MAX77843_INTSRC_MASK_MASK,
(unsigned int)~MAX77843_INTSRC_MASK_MASK);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to unmask interrupt source\n");
goto err_pmic_id;
}
ret = mfd_add_devices(max77843->dev, -1, max77843_devs,
ARRAY_SIZE(max77843_devs), NULL, 0, NULL);
if (ret < 0) {
dev_err(&i2c->dev, "Failed to add mfd device\n");
goto err_pmic_id;
}
device_init_wakeup(max77843->dev, true);
return 0;
err_pmic_id:
regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
return ret;
}
static int max77843_remove(struct i2c_client *i2c)
{
struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
mfd_remove_devices(max77843->dev);
regmap_del_irq_chip(max77843->irq, max77843->irq_data_topsys);
i2c_unregister_device(max77843->i2c_chg);
return 0;
}
static const struct of_device_id max77843_dt_match[] = {
{ .compatible = "maxim,max77843", },
{ },
};
static const struct i2c_device_id max77843_id[] = {
{ "max77843", TYPE_MAX77843, },
{ },
};
MODULE_DEVICE_TABLE(i2c, max77843_id);
static int __maybe_unused max77843_suspend(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
disable_irq(max77843->irq);
if (device_may_wakeup(dev))
enable_irq_wake(max77843->irq);
return 0;
}
static int __maybe_unused max77843_resume(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct max77693_dev *max77843 = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
disable_irq_wake(max77843->irq);
enable_irq(max77843->irq);
return 0;
}
static SIMPLE_DEV_PM_OPS(max77843_pm, max77843_suspend, max77843_resume);
static struct i2c_driver max77843_i2c_driver = {
.driver = {
.name = "max77843",
.pm = &max77843_pm,
.of_match_table = max77843_dt_match,
},
.probe = max77843_probe,
.remove = max77843_remove,
.id_table = max77843_id,
};
static int __init max77843_i2c_init(void)
{
return i2c_add_driver(&max77843_i2c_driver);
}
subsys_initcall(max77843_i2c_init);
static void __exit max77843_i2c_exit(void)
{
i2c_del_driver(&max77843_i2c_driver);
}
module_exit(max77843_i2c_exit);
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