// SPDX-License-Identifier: GPL-2.0-or-later
/*
* AXP20X and AXP22X PMICs' ACIN power supply driver
*
* Copyright (C) 2016 Free Electrons
* Quentin Schulz <quentin.schulz@free-electrons.com>
*/
#include <linux/device.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/kernel.h>
#include <linux/mfd/axp20x.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/platform_device.h>
#include <linux/pm.h>
#include <linux/power_supply.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/iio/consumer.h>
#define AXP20X_PWR_STATUS_ACIN_PRESENT BIT(7)
#define AXP20X_PWR_STATUS_ACIN_AVAIL BIT(6)
#define AXP813_ACIN_PATH_SEL BIT(7)
#define AXP813_ACIN_PATH_SEL_TO_BIT(x) (!!(x) << 7)
#define AXP813_VHOLD_MASK GENMASK(5, 3)
#define AXP813_VHOLD_UV_TO_BIT(x) ((((x) / 100000) - 40) << 3)
#define AXP813_VHOLD_REG_TO_UV(x) \
(((((x) & AXP813_VHOLD_MASK) >> 3) + 40) * 100000)
#define AXP813_CURR_LIMIT_MASK GENMASK(2, 0)
#define AXP813_CURR_LIMIT_UA_TO_BIT(x) (((x) / 500000) - 3)
#define AXP813_CURR_LIMIT_REG_TO_UA(x) \
((((x) & AXP813_CURR_LIMIT_MASK) + 3) * 500000)
#define DRVNAME "axp20x-ac-power-supply"
struct axp20x_ac_power {
struct regmap *regmap;
struct power_supply *supply;
struct iio_channel *acin_v;
struct iio_channel *acin_i;
bool has_acin_path_sel;
unsigned int num_irqs;
unsigned int irqs[];
};
static irqreturn_t axp20x_ac_power_irq(int irq, void *devid)
{
struct axp20x_ac_power *power = devid;
power_supply_changed(power->supply);
return IRQ_HANDLED;
}
static int axp20x_ac_power_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
int ret, reg;
switch (psp) {
case POWER_SUPPLY_PROP_HEALTH:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
if (reg & AXP20X_PWR_STATUS_ACIN_PRESENT) {
val->intval = POWER_SUPPLY_HEALTH_GOOD;
return 0;
}
val->intval = POWER_SUPPLY_HEALTH_UNKNOWN;
return 0;
case POWER_SUPPLY_PROP_PRESENT:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_PRESENT);
return 0;
case POWER_SUPPLY_PROP_ONLINE:
ret = regmap_read(power->regmap, AXP20X_PWR_INPUT_STATUS, ®);
if (ret)
return ret;
val->intval = !!(reg & AXP20X_PWR_STATUS_ACIN_AVAIL);
/* ACIN_PATH_SEL disables ACIN even if ACIN_AVAIL is set. */
if (val->intval && power->has_acin_path_sel) {
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL,
®);
if (ret)
return ret;
val->intval = !!(reg & AXP813_ACIN_PATH_SEL);
}
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
ret = iio_read_channel_processed(power->acin_v, &val->intval);
if (ret)
return ret;
/* IIO framework gives mV but Power Supply framework gives uV */
val->intval *= 1000;
return 0;
case POWER_SUPPLY_PROP_CURRENT_NOW:
ret = iio_read_channel_processed(power->acin_i, &val->intval);
if (ret)
return ret;
/* IIO framework gives mA but Power Supply framework gives uA */
val->intval *= 1000;
return 0;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®);
if (ret)
return ret;
val->intval = AXP813_VHOLD_REG_TO_UV(reg);
return 0;
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
ret = regmap_read(power->regmap, AXP813_ACIN_PATH_CTRL, ®);
if (ret)
return ret;
val->intval = AXP813_CURR_LIMIT_REG_TO_UA(reg);
/* AXP813 datasheet defines values 11x as 4000mA */
if (val->intval > 4000000)
val->intval = 4000000;
return 0;
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp813_ac_power_set_property(struct power_supply *psy,
enum power_supply_property psp,
const union power_supply_propval *val)
{
struct axp20x_ac_power *power = power_supply_get_drvdata(psy);
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_ACIN_PATH_SEL,
AXP813_ACIN_PATH_SEL_TO_BIT(val->intval));
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
if (val->intval < 4000000 || val->intval > 4700000)
return -EINVAL;
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_VHOLD_MASK,
AXP813_VHOLD_UV_TO_BIT(val->intval));
case POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT:
if (val->intval < 1500000 || val->intval > 4000000)
return -EINVAL;
return regmap_update_bits(power->regmap, AXP813_ACIN_PATH_CTRL,
AXP813_CURR_LIMIT_MASK,
AXP813_CURR_LIMIT_UA_TO_BIT(val->intval));
default:
return -EINVAL;
}
return -EINVAL;
}
static int axp813_ac_power_prop_writeable(struct power_supply *psy,
enum power_supply_property psp)
{
return psp == POWER_SUPPLY_PROP_ONLINE ||
psp == POWER_SUPPLY_PROP_VOLTAGE_MIN ||
psp == POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT;
}
static enum power_supply_property axp20x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_NOW,
POWER_SUPPLY_PROP_CURRENT_NOW,
};
static enum power_supply_property axp22x_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
};
static enum power_supply_property axp813_ac_power_properties[] = {
POWER_SUPPLY_PROP_HEALTH,
POWER_SUPPLY_PROP_PRESENT,
POWER_SUPPLY_PROP_ONLINE,
POWER_SUPPLY_PROP_VOLTAGE_MIN,
POWER_SUPPLY_PROP_INPUT_CURRENT_LIMIT,
};
static const struct power_supply_desc axp20x_ac_power_desc = {
.name = "axp20x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp20x_ac_power_properties,
.num_properties = ARRAY_SIZE(axp20x_ac_power_properties),
.get_property = axp20x_ac_power_get_property,
};
static const struct power_supply_desc axp22x_ac_power_desc = {
.name = "axp22x-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp22x_ac_power_properties,
.num_properties = ARRAY_SIZE(axp22x_ac_power_properties),
.get_property = axp20x_ac_power_get_property,
};
static const struct power_supply_desc axp813_ac_power_desc = {
.name = "axp813-ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = axp813_ac_power_properties,
.num_properties = ARRAY_SIZE(axp813_ac_power_properties),
.property_is_writeable = axp813_ac_power_prop_writeable,
.get_property = axp20x_ac_power_get_property,
.set_property = axp813_ac_power_set_property,
};
static const char * const axp20x_irq_names[] = {
"ACIN_PLUGIN",
"ACIN_REMOVAL",
};
struct axp_data {
const struct power_supply_desc *power_desc;
const char * const *irq_names;
unsigned int num_irq_names;
bool acin_adc;
bool acin_path_sel;
};
static const struct axp_data axp20x_data = {
.power_desc = &axp20x_ac_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.acin_adc = true,
.acin_path_sel = false,
};
static const struct axp_data axp22x_data = {
.power_desc = &axp22x_ac_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.acin_adc = false,
.acin_path_sel = false,
};
static const struct axp_data axp813_data = {
.power_desc = &axp813_ac_power_desc,
.irq_names = axp20x_irq_names,
.num_irq_names = ARRAY_SIZE(axp20x_irq_names),
.acin_adc = false,
.acin_path_sel = true,
};
#ifdef CONFIG_PM_SLEEP
static int axp20x_ac_power_suspend(struct device *dev)
{
struct axp20x_ac_power *power = dev_get_drvdata(dev);
int i = 0;
/*
* Allow wake via ACIN_PLUGIN only.
*
* As nested threaded IRQs are not automatically disabled during
* suspend, we must explicitly disable the remainder of the IRQs.
*/
if (device_may_wakeup(&power->supply->dev))
enable_irq_wake(power->irqs[i++]);
while (i < power->num_irqs)
disable_irq(power->irqs[i++]);
return 0;
}
static int axp20x_ac_power_resume(struct device *dev)
{
struct axp20x_ac_power *power = dev_get_drvdata(dev);
int i = 0;
if (device_may_wakeup(&power->supply->dev))
disable_irq_wake(power->irqs[i++]);
while (i < power->num_irqs)
enable_irq(power->irqs[i++]);
return 0;
}
#endif
static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend,
axp20x_ac_power_resume);
static int axp20x_ac_power_probe(struct platform_device *pdev)
{
struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent);
struct power_supply_config psy_cfg = {};
struct axp20x_ac_power *power;
const struct axp_data *axp_data;
int i, irq, ret;
if (!of_device_is_available(pdev->dev.of_node))
return -ENODEV;
if (!axp20x) {
dev_err(&pdev->dev, "Parent drvdata not set\n");
return -EINVAL;
}
axp_data = of_device_get_match_data(&pdev->dev);
power = devm_kzalloc(&pdev->dev,
struct_size(power, irqs, axp_data->num_irq_names),
GFP_KERNEL);
if (!power)
return -ENOMEM;
if (axp_data->acin_adc) {
power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v");
if (IS_ERR(power->acin_v)) {
if (PTR_ERR(power->acin_v) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->acin_v);
}
power->acin_i = devm_iio_channel_get(&pdev->dev, "acin_i");
if (IS_ERR(power->acin_i)) {
if (PTR_ERR(power->acin_i) == -ENODEV)
return -EPROBE_DEFER;
return PTR_ERR(power->acin_i);
}
}
power->regmap = dev_get_regmap(pdev->dev.parent, NULL);
power->has_acin_path_sel = axp_data->acin_path_sel;
power->num_irqs = axp_data->num_irq_names;
platform_set_drvdata(pdev, power);
psy_cfg.of_node = pdev->dev.of_node;
psy_cfg.drv_data = power;
power->supply = devm_power_supply_register(&pdev->dev,
axp_data->power_desc,
&psy_cfg);
if (IS_ERR(power->supply))
return PTR_ERR(power->supply);
/* Request irqs after registering, as irqs may trigger immediately */
for (i = 0; i < axp_data->num_irq_names; i++) {
irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]);
if (irq < 0) {
dev_err(&pdev->dev, "No IRQ for %s: %d\n",
axp_data->irq_names[i], irq);
return irq;
}
power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq);
ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i],
axp20x_ac_power_irq, 0,
DRVNAME, power);
if (ret < 0) {
dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n",
axp_data->irq_names[i], ret);
return ret;
}
}
return 0;
}
static const struct of_device_id axp20x_ac_power_match[] = {
{
.compatible = "x-powers,axp202-ac-power-supply",
.data = &axp20x_data,
}, {
.compatible = "x-powers,axp221-ac-power-supply",
.data = &axp22x_data,
}, {
.compatible = "x-powers,axp813-ac-power-supply",
.data = &axp813_data,
}, { /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, axp20x_ac_power_match);
static struct platform_driver axp20x_ac_power_driver = {
.probe = axp20x_ac_power_probe,
.driver = {
.name = DRVNAME,
.of_match_table = axp20x_ac_power_match,
.pm = &axp20x_ac_power_pm_ops,
},
};
module_platform_driver(axp20x_ac_power_driver);
MODULE_AUTHOR("Quentin Schulz <quentin.schulz@free-electrons.com>");
MODULE_DESCRIPTION("AXP20X and AXP22X PMICs' AC power supply driver");
MODULE_LICENSE("GPL");