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// SPDX-License-Identifier: GPL-2.0-or-later
//
// Copyright (C) 2018 ROHM Semiconductors
//
// ROHM BD71837MWV and BD71847MWV PMIC driver
//
// Datasheet for BD71837MWV available from
// https://www.rohm.com/datasheet/BD71837MWV/bd71837mwv-e
#include <common.h>
#include <i2c/i2c.h>
#include <mfd/bd71837.h>
#include <linux/mfd/core.h>
#include <driver.h>
#include <poweroff.h>
#include <of.h>
#include <linux/regmap.h>
static struct mfd_cell bd71837_mfd_cells[] = {
{ .name = "gpio-keys", },
{ .name = "bd71837-clk", },
{ .name = "bd71837-pmic", },
};
static struct mfd_cell bd71847_mfd_cells[] = {
{ .name = "gpio-keys", },
{ .name = "bd71847-clk", },
{ .name = "bd71847-pmic", },
};
static const struct regmap_config bd718xx_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = BD718XX_MAX_REGISTER - 1,
};
static int bd718xx_init_press_duration(struct regmap *regmap,
struct device *dev)
{
u32 short_press_ms, long_press_ms;
u32 short_press_value, long_press_value;
int ret;
ret = of_property_read_u32(dev->of_node, "rohm,short-press-ms",
&short_press_ms);
if (!ret) {
short_press_value = min(15u, (short_press_ms + 250) / 500);
ret = regmap_update_bits(regmap, BD718XX_PWRONCONFIG0,
BD718XX_PWRBTN_PRESS_DURATION_MASK,
short_press_value);
if (ret) {
dev_err(dev, "Failed to init pwron short press\n");
return ret;
}
}
ret = of_property_read_u32(dev->of_node, "rohm,long-press-ms",
&long_press_ms);
if (!ret) {
long_press_value = min(15u, (long_press_ms + 500) / 1000);
ret = regmap_update_bits(regmap, BD718XX_PWRONCONFIG1,
BD718XX_PWRBTN_PRESS_DURATION_MASK,
long_press_value);
if (ret) {
dev_err(dev, "Failed to init pwron long press\n");
return ret;
}
}
return 0;
}
static int bd718xx_i2c_probe(struct device *dev)
{
struct i2c_client *i2c = to_i2c_client(dev);
struct regmap *regmap;
int ret;
unsigned int chip_type;
struct mfd_cell *mfd;
int cells;
chip_type = (unsigned int)(uintptr_t)device_get_match_data(dev);
switch (chip_type) {
case ROHM_CHIP_TYPE_BD71837:
mfd = bd71837_mfd_cells;
cells = ARRAY_SIZE(bd71837_mfd_cells);
break;
case ROHM_CHIP_TYPE_BD71847:
mfd = bd71847_mfd_cells;
cells = ARRAY_SIZE(bd71847_mfd_cells);
break;
default:
dev_err(dev, "Unknown device type");
return -EINVAL;
}
regmap = regmap_init_i2c(i2c, &bd718xx_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "regmap initialization failed\n");
return PTR_ERR(regmap);
}
ret = bd718xx_init_press_duration(regmap, dev);
if (ret)
return ret;
ret = mfd_add_devices(dev, mfd, cells);
if (ret)
dev_err(dev, "Failed to create subdevices\n");
return regmap_register_cdev(regmap, NULL);
}
static const struct of_device_id bd718xx_of_match[] = {
{
.compatible = "rohm,bd71837",
.data = (void *)ROHM_CHIP_TYPE_BD71837,
},
{
.compatible = "rohm,bd71847",
.data = (void *)ROHM_CHIP_TYPE_BD71847,
},
{
.compatible = "rohm,bd71850",
.data = (void *)ROHM_CHIP_TYPE_BD71847,
},
{ }
};
MODULE_DEVICE_TABLE(of, bd718xx_of_match);
static struct driver bd718xx_i2c_driver = {
.name = "rohm-bd718x7",
.of_match_table = bd718xx_of_match,
.probe = bd718xx_i2c_probe,
};
coredevice_i2c_driver(bd718xx_i2c_driver);
MODULE_AUTHOR("Matti Vaittinen <matti.vaittinen@fi.rohmeurope.com>");
MODULE_DESCRIPTION("ROHM BD71837/BD71847 Power Management IC driver");
MODULE_LICENSE("GPL");
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