164 lines
3.9 KiB
C
164 lines
3.9 KiB
C
/*
|
|
* drivers/power/supply/axp152_vbus_power.c
|
|
* (C) Copyright 2020-2025
|
|
* Allwinner Technology Co., Ltd. <www.allwinnertech.com>
|
|
*
|
|
* vbus driver of axp152
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License as
|
|
* published by the Free Software Foundation; either version 2 of
|
|
* the License, or (at your option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/init.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/mfd/axp2101.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
#include <linux/slab.h>
|
|
#include <linux/workqueue.h>
|
|
#include <linux/power_supply.h>
|
|
|
|
struct vbus_power {
|
|
struct axp20x_dev *axp20x;
|
|
char *bootreason;
|
|
struct delayed_work vbus_work;
|
|
unsigned int interval;
|
|
};
|
|
|
|
static struct vbus_power vbus;
|
|
|
|
static enum power_supply_property axp152_usb_ac_props[] = {
|
|
POWER_SUPPLY_PROP_PRESENT,
|
|
POWER_SUPPLY_PROP_ONLINE,
|
|
};
|
|
|
|
static int axp152_read_vbus_state(union power_supply_propval *val)
|
|
{
|
|
int ret = 0;
|
|
unsigned int data;
|
|
|
|
ret = regmap_read(vbus.axp20x->regmap, AXP152_GPIO_INPUT, &data);
|
|
if (ret < 0)
|
|
return ret;
|
|
/* vbus is good when vbus state set */
|
|
val->intval = !!(~data & (1 << 1));
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int axp152_usb_ac_get_property(struct power_supply *psy,
|
|
enum power_supply_property psp,
|
|
union power_supply_propval *val)
|
|
{
|
|
int ret = 0;
|
|
|
|
switch (psp) {
|
|
case POWER_SUPPLY_PROP_ONLINE:
|
|
case POWER_SUPPLY_PROP_PRESENT:
|
|
ret = axp152_read_vbus_state(val);
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
#if 0
|
|
/* check the gpio1's status in per 1s */
|
|
static void check_vbus_status(struct work_struct *work)
|
|
{
|
|
unsigned int val;
|
|
struct vbus_power *vbus_dev = container_of(work,
|
|
struct vbus_power, vbus_work.work);
|
|
|
|
regmap_read(vbus_dev->axp20x->regmap, AXP152_GPIO_INPUT, &val);
|
|
|
|
schedule_delayed_work(&vbus.vbus_work, vbus.interval);
|
|
}
|
|
#endif
|
|
|
|
static int axp152_vbus_probe(struct platform_device *pdev)
|
|
{
|
|
struct power_supply_desc *ac_desc;
|
|
struct power_supply *ac;
|
|
// unsigned int val, vbus_val;
|
|
int ret = 0;
|
|
struct power_supply_config psy_cfg = {
|
|
.of_node = pdev->dev.of_node,
|
|
};
|
|
|
|
vbus.axp20x = dev_get_drvdata(pdev->dev.parent);
|
|
|
|
if (!vbus.axp20x) {
|
|
dev_err(&pdev->dev, "Parent drvdata not set\n");
|
|
return -EINVAL;
|
|
}
|
|
#if 0
|
|
/* set gpio1 control */
|
|
regmap_read(vbus.axp20x->regmap, AXP152_GPIO1_CTRL, &val);
|
|
val &= ~(0x7);
|
|
val |= 0x3;
|
|
regmap_write(vbus.axp20x->regmap, AXP152_GPIO1_CTRL, val);
|
|
|
|
/* check the source of power on*/
|
|
regmap_read(vbus.axp20x->regmap, AXP152_PWR_OP_MODE, &val);
|
|
/* check the vbus */
|
|
regmap_read(vbus.axp20x->regmap, AXP152_GPIO_INPUT, &vbus_val);
|
|
|
|
vbus.interval = msecs_to_jiffies(1 * 1000);
|
|
INIT_DELAYED_WORK(&vbus.vbus_work, check_vbus_status);
|
|
schedule_delayed_work(&vbus.vbus_work, vbus.interval);
|
|
#endif
|
|
ac_desc = devm_kzalloc(&pdev->dev, sizeof(*ac_desc), GFP_KERNEL);
|
|
if (!ac_desc) {
|
|
ret = -ENOMEM;
|
|
goto err;
|
|
}
|
|
|
|
ac_desc->name = "ac";
|
|
ac_desc->type = POWER_SUPPLY_TYPE_MAINS;
|
|
ac_desc->properties = axp152_usb_ac_props;
|
|
ac_desc->num_properties = ARRAY_SIZE(axp152_usb_ac_props);
|
|
ac_desc->get_property = axp152_usb_ac_get_property;
|
|
ac_desc->set_property = NULL;
|
|
|
|
ac_desc->property_is_writeable = NULL;
|
|
|
|
ac = power_supply_register(&pdev->dev, ac_desc, &psy_cfg);
|
|
if (IS_ERR(ac)) {
|
|
printk("failed to register vbus_power\n");
|
|
ret = PTR_ERR(ac);
|
|
goto err;
|
|
}
|
|
|
|
return 0;
|
|
err:
|
|
power_supply_unregister(ac);
|
|
return ret;
|
|
}
|
|
|
|
static const struct of_device_id axp152_vbus_match[] = {
|
|
{ .compatible = "x-powers,axp152-vbus" },
|
|
{ },
|
|
};
|
|
|
|
static struct platform_driver axp152_vbus_driver = {
|
|
.probe = axp152_vbus_probe,
|
|
.driver = {
|
|
.name = "axp152-vbus",
|
|
.of_match_table = axp152_vbus_match,
|
|
},
|
|
};
|
|
module_platform_driver(axp152_vbus_driver);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("<lihuaxing@allwinnertech.com>");
|
|
MODULE_DESCRIPTION("vbus Driver for axp152 PMIC");
|