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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 <linux/gpio_keys.h>
#include <linux/i2c.h>
#include <linux/input.h>
#include <linux/interrupt.h>
#include <linux/mfd/rohm-bd718x7.h>
#include <linux/mfd/core.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/types.h>
static struct gpio_keys_button button = {
.code = KEY_POWER,
.gpio = -1,
.type = EV_KEY,
};
static struct gpio_keys_platform_data bd718xx_powerkey_data = {
.buttons = &button,
.nbuttons = 1,
.name = "bd718xx-pwrkey",
};
static struct mfd_cell bd71837_mfd_cells[] = {
{
.name = "gpio-keys",
.platform_data = &bd718xx_powerkey_data,
.pdata_size = sizeof(bd718xx_powerkey_data),
},
{ .name = "bd71837-clk", },
{ .name = "bd71837-pmic", },
};
static struct mfd_cell bd71847_mfd_cells[] = {
{
.name = "gpio-keys",
.platform_data = &bd718xx_powerkey_data,
.pdata_size = sizeof(bd718xx_powerkey_data),
},
{ .name = "bd71847-clk", },
{ .name = "bd71847-pmic", },
};
static const struct regmap_irq bd718xx_irqs[] = {
REGMAP_IRQ_REG(BD718XX_INT_SWRST, 0, BD718XX_INT_SWRST_MASK),
REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_S, 0, BD718XX_INT_PWRBTN_S_MASK),
REGMAP_IRQ_REG(BD718XX_INT_PWRBTN_L, 0, BD718XX_INT_PWRBTN_L_MASK),
REGMAP_IRQ_REG(BD718XX_INT_PWRBTN, 0, BD718XX_INT_PWRBTN_MASK),
REGMAP_IRQ_REG(BD718XX_INT_WDOG, 0, BD718XX_INT_WDOG_MASK),
REGMAP_IRQ_REG(BD718XX_INT_ON_REQ, 0, BD718XX_INT_ON_REQ_MASK),
REGMAP_IRQ_REG(BD718XX_INT_STBY_REQ, 0, BD718XX_INT_STBY_REQ_MASK),
};
static const struct regmap_irq_chip bd718xx_irq_chip = {
.name = "bd718xx-irq",
.irqs = bd718xx_irqs,
.num_irqs = ARRAY_SIZE(bd718xx_irqs),
.num_regs = 1,
.irq_reg_stride = 1,
.status_base = BD718XX_REG_IRQ,
.mask_base = BD718XX_REG_MIRQ,
.ack_base = BD718XX_REG_IRQ,
.init_ack_masked = true,
};
static const struct regmap_range pmic_status_range = {
.range_min = BD718XX_REG_IRQ,
.range_max = BD718XX_REG_POW_STATE,
};
static const struct regmap_access_table volatile_regs = {
.yes_ranges = &pmic_status_range,
.n_yes_ranges = 1,
};
static const struct regmap_config bd718xx_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_table = &volatile_regs,
.max_register = BD718XX_MAX_REGISTER - 1,
.cache_type = REGCACHE_MAPLE,
};
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_REG_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_REG_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 i2c_client *i2c)
{
struct regmap *regmap;
struct regmap_irq_chip_data *irq_data;
int ret;
unsigned int chip_type;
struct mfd_cell *mfd;
int cells;
if (!i2c->irq) {
dev_err(&i2c->dev, "No IRQ configured\n");
return -EINVAL;
}
chip_type = (unsigned int)(uintptr_t)
of_device_get_match_data(&i2c->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(&i2c->dev, "Unknown device type");
return -EINVAL;
}
regmap = devm_regmap_init_i2c(i2c, &bd718xx_regmap_config);
if (IS_ERR(regmap))
return dev_err_probe(&i2c->dev, PTR_ERR(regmap),
"regmap initialization failed\n");
ret = devm_regmap_add_irq_chip(&i2c->dev, regmap, i2c->irq,
IRQF_ONESHOT, 0, &bd718xx_irq_chip,
&irq_data);
if (ret)
return dev_err_probe(&i2c->dev, ret, "Failed to add irq_chip\n");
ret = bd718xx_init_press_duration(regmap, &i2c->dev);
if (ret)
return ret;
ret = regmap_irq_get_virq(irq_data, BD718XX_INT_PWRBTN_S);
if (ret < 0)
return dev_err_probe(&i2c->dev, ret, "Failed to get the IRQ\n");
button.irq = ret;
ret = devm_mfd_add_devices(&i2c->dev, PLATFORM_DEVID_AUTO,
mfd, cells, NULL, 0,
regmap_irq_get_domain(irq_data));
if (ret)
dev_err_probe(&i2c->dev, ret, "Failed to create subdevices\n");
return ret;
}
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 i2c_driver bd718xx_i2c_driver = {
.driver = {
.name = "rohm-bd718x7",
.of_match_table = bd718xx_of_match,
},
.probe = bd718xx_i2c_probe,
};
static int __init bd718xx_i2c_init(void)
{
return i2c_add_driver(&bd718xx_i2c_driver);
}
/* Initialise early so consumer devices can complete system boot */
subsys_initcall(bd718xx_i2c_init);
static void __exit bd718xx_i2c_exit(void)
{
i2c_del_driver(&bd718xx_i2c_driver);
}
module_exit(bd718xx_i2c_exit);
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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