linux/drivers/regulator/sy8827n.c
Rob Herring 045a44d4c9
regulator: Explicitly include correct DT includes
The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.

Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230714174930.4063320-1-robh@kernel.org
Signed-off-by: Mark Brown <broonie@kernel.org>
2023-07-14 20:52:54 +01:00

201 lines
5.0 KiB
C

// SPDX-License-Identifier: GPL-2.0
//
// SY8827N regulator driver
//
// Copyright (C) 2020 Synaptics Incorporated
//
// Author: Jisheng Zhang <jszhang@kernel.org>
#include <linux/gpio/consumer.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/of.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/of_regulator.h>
#define SY8827N_VSEL0 0
#define SY8827N_BUCK_EN (1 << 7)
#define SY8827N_MODE (1 << 6)
#define SY8827N_VSEL1 1
#define SY8827N_CTRL 2
#define SY8827N_ID1 3
#define SY8827N_ID2 4
#define SY8827N_PGOOD 5
#define SY8827N_MAX (SY8827N_PGOOD + 1)
#define SY8827N_NVOLTAGES 64
#define SY8827N_VSELMIN 600000
#define SY8827N_VSELSTEP 12500
struct sy8827n_device_info {
struct device *dev;
struct regulator_desc desc;
struct regulator_init_data *regulator;
struct gpio_desc *en_gpio;
unsigned int vsel_reg;
};
static int sy8827n_set_mode(struct regulator_dev *rdev, unsigned int mode)
{
struct sy8827n_device_info *di = rdev_get_drvdata(rdev);
switch (mode) {
case REGULATOR_MODE_FAST:
regmap_update_bits(rdev->regmap, di->vsel_reg,
SY8827N_MODE, SY8827N_MODE);
break;
case REGULATOR_MODE_NORMAL:
regmap_update_bits(rdev->regmap, di->vsel_reg,
SY8827N_MODE, 0);
break;
default:
return -EINVAL;
}
return 0;
}
static unsigned int sy8827n_get_mode(struct regulator_dev *rdev)
{
struct sy8827n_device_info *di = rdev_get_drvdata(rdev);
u32 val;
int ret = 0;
ret = regmap_read(rdev->regmap, di->vsel_reg, &val);
if (ret < 0)
return ret;
if (val & SY8827N_MODE)
return REGULATOR_MODE_FAST;
else
return REGULATOR_MODE_NORMAL;
}
static const struct regulator_ops sy8827n_regulator_ops = {
.set_voltage_sel = regulator_set_voltage_sel_regmap,
.get_voltage_sel = regulator_get_voltage_sel_regmap,
.set_voltage_time_sel = regulator_set_voltage_time_sel,
.map_voltage = regulator_map_voltage_linear,
.list_voltage = regulator_list_voltage_linear,
.enable = regulator_enable_regmap,
.disable = regulator_disable_regmap,
.is_enabled = regulator_is_enabled_regmap,
.set_mode = sy8827n_set_mode,
.get_mode = sy8827n_get_mode,
};
static int sy8827n_regulator_register(struct sy8827n_device_info *di,
struct regulator_config *config)
{
struct regulator_desc *rdesc = &di->desc;
struct regulator_dev *rdev;
rdesc->name = "sy8827n-reg";
rdesc->supply_name = "vin";
rdesc->ops = &sy8827n_regulator_ops;
rdesc->type = REGULATOR_VOLTAGE;
rdesc->n_voltages = SY8827N_NVOLTAGES;
rdesc->enable_reg = di->vsel_reg;
rdesc->enable_mask = SY8827N_BUCK_EN;
rdesc->min_uV = SY8827N_VSELMIN;
rdesc->uV_step = SY8827N_VSELSTEP;
rdesc->vsel_reg = di->vsel_reg;
rdesc->vsel_mask = rdesc->n_voltages - 1;
rdesc->owner = THIS_MODULE;
rdev = devm_regulator_register(di->dev, &di->desc, config);
return PTR_ERR_OR_ZERO(rdev);
}
static bool sy8827n_volatile_reg(struct device *dev, unsigned int reg)
{
if (reg == SY8827N_PGOOD)
return true;
return false;
}
static const struct regmap_config sy8827n_regmap_config = {
.reg_bits = 8,
.val_bits = 8,
.volatile_reg = sy8827n_volatile_reg,
.num_reg_defaults_raw = SY8827N_MAX,
.cache_type = REGCACHE_FLAT,
};
static int sy8827n_i2c_probe(struct i2c_client *client)
{
struct device *dev = &client->dev;
struct device_node *np = dev->of_node;
struct sy8827n_device_info *di;
struct regulator_config config = { };
struct regmap *regmap;
int ret;
di = devm_kzalloc(dev, sizeof(struct sy8827n_device_info), GFP_KERNEL);
if (!di)
return -ENOMEM;
di->regulator = of_get_regulator_init_data(dev, np, &di->desc);
if (!di->regulator) {
dev_err(dev, "Platform data not found!\n");
return -EINVAL;
}
di->en_gpio = devm_gpiod_get_optional(dev, "enable", GPIOD_OUT_HIGH);
if (IS_ERR(di->en_gpio))
return PTR_ERR(di->en_gpio);
if (of_property_read_bool(np, "silergy,vsel-state-high"))
di->vsel_reg = SY8827N_VSEL1;
else
di->vsel_reg = SY8827N_VSEL0;
di->dev = dev;
regmap = devm_regmap_init_i2c(client, &sy8827n_regmap_config);
if (IS_ERR(regmap)) {
dev_err(dev, "Failed to allocate regmap!\n");
return PTR_ERR(regmap);
}
i2c_set_clientdata(client, di);
config.dev = di->dev;
config.init_data = di->regulator;
config.regmap = regmap;
config.driver_data = di;
config.of_node = np;
ret = sy8827n_regulator_register(di, &config);
if (ret < 0)
dev_err(dev, "Failed to register regulator!\n");
return ret;
}
static const struct of_device_id sy8827n_dt_ids[] = {
{
.compatible = "silergy,sy8827n",
},
{ }
};
MODULE_DEVICE_TABLE(of, sy8827n_dt_ids);
static const struct i2c_device_id sy8827n_id[] = {
{ "sy8827n", },
{ },
};
MODULE_DEVICE_TABLE(i2c, sy8827n_id);
static struct i2c_driver sy8827n_regulator_driver = {
.driver = {
.name = "sy8827n-regulator",
.probe_type = PROBE_PREFER_ASYNCHRONOUS,
.of_match_table = sy8827n_dt_ids,
},
.probe = sy8827n_i2c_probe,
.id_table = sy8827n_id,
};
module_i2c_driver(sy8827n_regulator_driver);
MODULE_AUTHOR("Jisheng Zhang <jszhang@kernel.org>");
MODULE_DESCRIPTION("SY8827N regulator driver");
MODULE_LICENSE("GPL v2");