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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (C) 2021 ROHM Semiconductors
*
* ROHM BD9576MUF and BD9573MUF PMIC driver
*/
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/mfd/core.h>
#include <linux/mfd/rohm-bd957x.h>
#include <linux/mfd/rohm-generic.h>
#include <linux/module.h>
#include <linux/of_device.h>
#include <linux/regmap.h>
#include <linux/types.h>
static struct mfd_cell bd9573_mfd_cells[] = {
{ .name = "bd9573-regulator", },
{ .name = "bd9576-wdt", },
};
static struct mfd_cell bd9576_mfd_cells[] = {
{ .name = "bd9576-regulator", },
{ .name = "bd9576-wdt", },
};
static const struct regmap_range volatile_ranges[] = {
regmap_reg_range(BD957X_REG_SMRB_ASSERT, BD957X_REG_SMRB_ASSERT),
regmap_reg_range(BD957X_REG_PMIC_INTERNAL_STAT,
BD957X_REG_PMIC_INTERNAL_STAT),
regmap_reg_range(BD957X_REG_INT_THERM_STAT, BD957X_REG_INT_THERM_STAT),
regmap_reg_range(BD957X_REG_INT_OVP_STAT, BD957X_REG_INT_SYS_STAT),
regmap_reg_range(BD957X_REG_INT_MAIN_STAT, BD957X_REG_INT_MAIN_STAT),
};
static const struct regmap_access_table volatile_regs = {
.yes_ranges = &volatile_ranges[0],
.n_yes_ranges = ARRAY_SIZE(volatile_ranges),
};
static struct regmap_config bd957x_regmap = {
.reg_bits = 8,
.val_bits = 8,
.volatile_table = &volatile_regs,
.max_register = BD957X_MAX_REGISTER,
.cache_type = REGCACHE_RBTREE,
};
static int bd957x_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
int ret;
struct regmap *regmap;
struct mfd_cell *cells;
int num_cells;
unsigned long chip_type;
chip_type = (unsigned long)of_device_get_match_data(&i2c->dev);
switch (chip_type) {
case ROHM_CHIP_TYPE_BD9576:
cells = bd9576_mfd_cells;
num_cells = ARRAY_SIZE(bd9576_mfd_cells);
break;
case ROHM_CHIP_TYPE_BD9573:
cells = bd9573_mfd_cells;
num_cells = ARRAY_SIZE(bd9573_mfd_cells);
break;
default:
dev_err(&i2c->dev, "Unknown device type");
return -EINVAL;
}
regmap = devm_regmap_init_i2c(i2c, &bd957x_regmap);
if (IS_ERR(regmap)) {
dev_err(&i2c->dev, "Failed to initialize Regmap\n");
return PTR_ERR(regmap);
}
ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO, cells,
num_cells, NULL, 0, NULL);
if (ret)
dev_err(&i2c->dev, "Failed to create subdevices\n");
return ret;
}
static const struct of_device_id bd957x_of_match[] = {
{ .compatible = "rohm,bd9576", .data = (void *)ROHM_CHIP_TYPE_BD9576, },
{ .compatible = "rohm,bd9573", .data = (void *)ROHM_CHIP_TYPE_BD9573, },
{ },
};
MODULE_DEVICE_TABLE(of, bd957x_of_match);
static struct i2c_driver bd957x_drv = {
.driver = {
.name = "rohm-bd957x",
.of_match_table = bd957x_of_match,
},
.probe = &bd957x_i2c_probe,
};
module_i2c_driver(bd957x_drv);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD9576MUF and BD9573MUF Power Management IC driver");
MODULE_LICENSE("GPL");
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