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power: supply: bq25890: Add support for registering the Vbus boost converter as a regulator

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The bq25890_charger code supports enabling/disabling the boost converter
based on usb-phy notifications. But the usb-phy framework is not used on
all boards/platforms. At support for registering the Vbus boost converter
as a standard regulator when there is no usb-phy on the board.

Also add support for providing regulator_init_data through platform_data
for use on boards where device-tree is not used and the platform code must
thus provide the regulator_init_data.

Reviewed-by: Andy Shevchenko <andy.shevchenko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Hans de Goede 2022-02-01 14:06:56 +01:00 committed by Sebastian Reichel
parent 5575802d78
commit 79d35365a5
2 changed files with 95 additions and 0 deletions
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80
drivers/power/supply/bq25890_charger.c
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@ -8,7 +8,9 @@
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/power_supply.h>
#include <linux/power/bq25890_charger.h>
#include <linux/regmap.h>
#include <linux/regulator/driver.h>
#include <linux/types.h>
#include <linux/gpio/consumer.h>
#include <linux/interrupt.h>
@ -876,6 +878,45 @@ static int bq25890_usb_notifier(struct notifier_block *nb, unsigned long val,
return NOTIFY_OK;
}
#ifdef CONFIG_REGULATOR
static int bq25890_vbus_enable(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
return bq25890_set_otg_cfg(bq, 1);
}
static int bq25890_vbus_disable(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
return bq25890_set_otg_cfg(bq, 0);
}
static int bq25890_vbus_is_enabled(struct regulator_dev *rdev)
{
struct bq25890_device *bq = rdev_get_drvdata(rdev);
return bq25890_field_read(bq, F_OTG_CFG);
}
static const struct regulator_ops bq25890_vbus_ops = {
.enable = bq25890_vbus_enable,
.disable = bq25890_vbus_disable,
.is_enabled = bq25890_vbus_is_enabled,
};
static const struct regulator_desc bq25890_vbus_desc = {
.name = "usb_otg_vbus",
.of_match = "usb-otg-vbus",
.type = REGULATOR_VOLTAGE,
.owner = THIS_MODULE,
.ops = &bq25890_vbus_ops,
.fixed_uV = 5000000,
.n_voltages = 1,
};
#endif
static int bq25890_get_chip_version(struct bq25890_device *bq)
{
int id, rev;
@ -1075,6 +1116,22 @@ static int bq25890_probe(struct i2c_client *client,
bq->usb_nb.notifier_call = bq25890_usb_notifier;
usb_register_notifier(bq->usb_phy, &bq->usb_nb);
}
#ifdef CONFIG_REGULATOR
else {
struct bq25890_platform_data *pdata = dev_get_platdata(dev);
struct regulator_config cfg = { };
struct regulator_dev *reg;
cfg.dev = dev;
cfg.driver_data = bq;
if (pdata)
cfg.init_data = pdata->regulator_init_data;
reg = devm_regulator_register(dev, &bq25890_vbus_desc, &cfg);
if (IS_ERR(reg))
return dev_err_probe(dev, PTR_ERR(reg), "registering regulator");
}
#endif
ret = bq25890_power_supply_init(bq);
if (ret < 0) {
@ -1113,6 +1170,28 @@ static int bq25890_remove(struct i2c_client *client)
return 0;
}
static void bq25890_shutdown(struct i2c_client *client)
{
struct bq25890_device *bq = i2c_get_clientdata(client);
/*
* TODO this if + return should probably be removed, but that would
* introduce a function change for boards using the usb-phy framework.
* This needs to be tested on such a board before making this change.
*/
if (!IS_ERR_OR_NULL(bq->usb_phy))
return;
/*
* Turn off the 5v Boost regulator which outputs Vbus to the device's
* Micro-USB or Type-C USB port. Leaving this on drains power and
* this avoids the PMIC on some device-models seeing this as Vbus
* getting inserted after shutdown, causing the device to immediately
* power-up again.
*/
bq25890_set_otg_cfg(bq, 0);
}
#ifdef CONFIG_PM_SLEEP
static int bq25890_suspend(struct device *dev)
{
@ -1192,6 +1271,7 @@ static struct i2c_driver bq25890_driver = {
},
.probe = bq25890_probe,
.remove = bq25890_remove,
.shutdown = bq25890_shutdown,
.id_table = bq25890_i2c_ids,
};
module_i2c_driver(bq25890_driver);

15
include/linux/power/bq25890_charger.h Normal file
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@ -0,0 +1,15 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Platform data for the TI bq25890 battery charger driver.
*/
#ifndef _BQ25890_CHARGER_H_
#define _BQ25890_CHARGER_H_
struct regulator_init_data;
struct bq25890_platform_data {
const struct regulator_init_data *regulator_init_data;
};
#endif