mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-27 19:29:37 +00:00
![Krzysztof Kozlowski](/assets/img/avatar_default.png)
Replace GPL v2.0+ license statements with SPDX license identifiers. Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
219 lines
5.4 KiB
C
219 lines
5.4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
//
|
|
// 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>
|
|
|
|
#include <linux/err.h>
|
|
#include <linux/i2c.h>
|
|
#include <linux/init.h>
|
|
#include <linux/interrupt.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 const struct of_device_id max77843_dt_match[] = {
|
|
{ .compatible = "maxim,max77843", },
|
|
{ },
|
|
};
|
|
|
|
static const struct i2c_device_id max77843_id[] = {
|
|
{ "max77843", TYPE_MAX77843, },
|
|
{ },
|
|
};
|
|
|
|
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,
|
|
.suppress_bind_attrs = true,
|
|
},
|
|
.probe = max77843_probe,
|
|
.id_table = max77843_id,
|
|
};
|
|
|
|
static int __init max77843_i2c_init(void)
|
|
{
|
|
return i2c_add_driver(&max77843_i2c_driver);
|
|
}
|
|
subsys_initcall(max77843_i2c_init);
|