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// SPDX-License-Identifier: GPL-2.0-only
/*
* MFD core driver for the Richtek RT5033.
*
* RT5033 comprises multiple sub-devices switcing charger, fuel gauge,
* flash LED, current source, LDO and BUCK regulators.
*
* Copyright (C) 2014 Samsung Electronics, Co., Ltd.
* Author: Beomho Seo <beomho.seo@samsung.com>
*/
#include <linux/err.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/interrupt.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rt5033.h>
#include <linux/mfd/rt5033-private.h>
static const struct regmap_irq rt5033_irqs[] = {
{ .mask = RT5033_PMIC_IRQ_BUCKOCP, },
{ .mask = RT5033_PMIC_IRQ_BUCKLV, },
{ .mask = RT5033_PMIC_IRQ_SAFELDOLV, },
{ .mask = RT5033_PMIC_IRQ_LDOLV, },
{ .mask = RT5033_PMIC_IRQ_OT, },
{ .mask = RT5033_PMIC_IRQ_VDDA_UV, },
};
static const struct regmap_irq_chip rt5033_irq_chip = {
.name = "rt5033",
.status_base = RT5033_REG_PMIC_IRQ_STAT,
.unmask_base = RT5033_REG_PMIC_IRQ_CTRL,
.num_regs = 1,
.irqs = rt5033_irqs,
.num_irqs = ARRAY_SIZE(rt5033_irqs),
};
static const struct mfd_cell rt5033_devs[] = {
{ .name = "rt5033-regulator", },
{
.name = "rt5033-charger",
.of_compatible = "richtek,rt5033-charger",
}, {
.name = "rt5033-led",
.of_compatible = "richtek,rt5033-led",
},
};
static const struct regmap_config rt5033_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = RT5033_REG_END,
};
static int rt5033_i2c_probe(struct i2c_client *i2c)
{
struct rt5033_dev *rt5033;
unsigned int dev_id, chip_rev;
int ret;
rt5033 = devm_kzalloc(&i2c->dev, sizeof(*rt5033), GFP_KERNEL);
if (!rt5033)
return -ENOMEM;
i2c_set_clientdata(i2c, rt5033);
rt5033->dev = &i2c->dev;
rt5033->irq = i2c->irq;
rt5033->wakeup = true;
rt5033->regmap = devm_regmap_init_i2c(i2c, &rt5033_regmap_config);
if (IS_ERR(rt5033->regmap)) {
dev_err(&i2c->dev, "Failed to allocate register map.\n");
return PTR_ERR(rt5033->regmap);
}
ret = regmap_read(rt5033->regmap, RT5033_REG_DEVICE_ID, &dev_id);
if (ret) {
dev_err(&i2c->dev, "Device not found\n");
return -ENODEV;
}
chip_rev = dev_id & RT5033_CHIP_REV_MASK;
dev_info(&i2c->dev, "Device found (rev. %d)\n", chip_rev);
ret = regmap_add_irq_chip(rt5033->regmap, rt5033->irq,
IRQF_TRIGGER_FALLING | IRQF_ONESHOT,
0, &rt5033_irq_chip, &rt5033->irq_data);
if (ret) {
dev_err(&i2c->dev, "Failed to request IRQ %d: %d\n",
rt5033->irq, ret);
return ret;
}
ret = devm_mfd_add_devices(rt5033->dev, -1, rt5033_devs,
ARRAY_SIZE(rt5033_devs), NULL, 0,
regmap_irq_get_domain(rt5033->irq_data));
if (ret < 0) {
dev_err(&i2c->dev, "Failed to add RT5033 child devices.\n");
return ret;
}
device_init_wakeup(rt5033->dev, rt5033->wakeup);
return 0;
}
static const struct i2c_device_id rt5033_i2c_id[] = {
{ "rt5033", },
{ }
};
MODULE_DEVICE_TABLE(i2c, rt5033_i2c_id);
static const struct of_device_id rt5033_dt_match[] = {
{ .compatible = "richtek,rt5033", },
{ }
};
MODULE_DEVICE_TABLE(of, rt5033_dt_match);
static struct i2c_driver rt5033_driver = {
.driver = {
.name = "rt5033",
.of_match_table = rt5033_dt_match,
},
.probe = rt5033_i2c_probe,
.id_table = rt5033_i2c_id,
};
module_i2c_driver(rt5033_driver);
MODULE_DESCRIPTION("Richtek RT5033 multi-function core driver");
MODULE_AUTHOR("Beomho Seo <beomho.seo@samsung.com>");
MODULE_LICENSE("GPL");
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