mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-08-23 17:30:02 +00:00
![Jean Delvare](/assets/img/avatar_default.png)
Since commit 0166dc11be
("of: make CONFIG_OF user selectable"), it
is possible to test-build any driver which depends on OF on any
architecture by explicitly selecting OF. Therefore depending on
COMPILE_TEST as an alternative is no longer needed.
It is actually better to always build such drivers with OF enabled,
so that the test builds are closer to how each driver will actually be
built on its intended target. Building them without OF may not test
much as the compiler will optimize out potentially large parts of the
code. In the worst case, this could even pop false positive warnings.
Dropping COMPILE_TEST here improves the quality of our testing and
avoids wasting time on non-existent issues.
As a minor optimization, this also lets us drop several occurrences of
of_match_ptr(), __maybe_unused and some ifdef guarding, as we now know
what all of this will resolve to, we might as well save cpp some work.
Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Liam Girdwood <lgirdwood@gmail.com>
Cc: Mark Brown <broonie@kernel.org>
Cc: Icenowy Zheng <icenowy@aosc.io>
Link: https://lore.kernel.org/r/20221124144708.64371b98@endymion.delvare
Signed-off-by: Mark Brown <broonie@kernel.org>
199 lines
4.9 KiB
C
199 lines
4.9 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_device.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",
|
|
.of_match_table = sy8827n_dt_ids,
|
|
},
|
|
.probe_new = 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");
|