Commit 34765148 authored by Arnd Bergmann's avatar Arnd Bergmann

power: remove z2_battery driver

The PXA z2 platform is gone, and this driver is now orphaned.

Cc: linux-pm@vger.kernel.org
Cc: Peter Edwards <sweetlilmre@gmail.com>
Acked-by: default avatarSebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: default avatarRobert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: default avatarArnd Bergmann <arnd@arndb.de>
parent ce79f3a1
......@@ -422,12 +422,6 @@ config BATTERY_MAX1721X
Say Y here to enable support for the MAX17211/MAX17215 standalone
battery gas-gauge.
config BATTERY_Z2
tristate "Z2 battery driver"
depends on I2C && MACH_ZIPIT2
help
Say Y to include support for the battery on the Zipit Z2.
config BATTERY_TWL4030_MADC
tristate "TWL4030 MADC battery driver"
depends on TWL4030_MADC
......
......@@ -54,7 +54,6 @@ obj-$(CONFIG_BATTERY_DA9150) += da9150-fg.o
obj-$(CONFIG_BATTERY_MAX17040) += max17040_battery.o
obj-$(CONFIG_BATTERY_MAX17042) += max17042_battery.o
obj-$(CONFIG_BATTERY_MAX1721X) += max1721x_battery.o
obj-$(CONFIG_BATTERY_Z2) += z2_battery.o
obj-$(CONFIG_BATTERY_RT5033) += rt5033_battery.o
obj-$(CONFIG_CHARGER_RT9455) += rt9455_charger.o
obj-$(CONFIG_BATTERY_TWL4030_MADC) += twl4030_madc_battery.o
......
// SPDX-License-Identifier: GPL-2.0-only
/*
* Battery measurement code for Zipit Z2
*
* Copyright (C) 2009 Peter Edwards <sweetlilmre@gmail.com>
*/
#include <linux/module.h>
#include <linux/gpio/consumer.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/irq.h>
#include <linux/power_supply.h>
#include <linux/slab.h>
#include <linux/z2_battery.h>
#define Z2_DEFAULT_NAME "Z2"
struct z2_charger {
struct z2_battery_info *info;
struct gpio_desc *charge_gpiod;
int bat_status;
struct i2c_client *client;
struct power_supply *batt_ps;
struct power_supply_desc batt_ps_desc;
struct mutex work_lock;
struct work_struct bat_work;
};
static unsigned long z2_read_bat(struct z2_charger *charger)
{
int data;
data = i2c_smbus_read_byte_data(charger->client,
charger->info->batt_I2C_reg);
if (data < 0)
return 0;
return data * charger->info->batt_mult / charger->info->batt_div;
}
static int z2_batt_get_property(struct power_supply *batt_ps,
enum power_supply_property psp,
union power_supply_propval *val)
{
struct z2_charger *charger = power_supply_get_drvdata(batt_ps);
struct z2_battery_info *info = charger->info;
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
val->intval = charger->bat_status;
break;
case POWER_SUPPLY_PROP_TECHNOLOGY:
val->intval = info->batt_tech;
break;
case POWER_SUPPLY_PROP_VOLTAGE_NOW:
if (info->batt_I2C_reg >= 0)
val->intval = z2_read_bat(charger);
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MAX:
if (info->max_voltage >= 0)
val->intval = info->max_voltage;
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_VOLTAGE_MIN:
if (info->min_voltage >= 0)
val->intval = info->min_voltage;
else
return -EINVAL;
break;
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1;
break;
default:
return -EINVAL;
}
return 0;
}
static void z2_batt_ext_power_changed(struct power_supply *batt_ps)
{
struct z2_charger *charger = power_supply_get_drvdata(batt_ps);
schedule_work(&charger->bat_work);
}
static void z2_batt_update(struct z2_charger *charger)
{
int old_status = charger->bat_status;
mutex_lock(&charger->work_lock);
charger->bat_status = charger->charge_gpiod ?
(gpiod_get_value(charger->charge_gpiod) ?
POWER_SUPPLY_STATUS_CHARGING :
POWER_SUPPLY_STATUS_DISCHARGING) :
POWER_SUPPLY_STATUS_UNKNOWN;
if (old_status != charger->bat_status) {
pr_debug("%s: %i -> %i\n", charger->batt_ps->desc->name,
old_status,
charger->bat_status);
power_supply_changed(charger->batt_ps);
}
mutex_unlock(&charger->work_lock);
}
static void z2_batt_work(struct work_struct *work)
{
struct z2_charger *charger;
charger = container_of(work, struct z2_charger, bat_work);
z2_batt_update(charger);
}
static irqreturn_t z2_charge_switch_irq(int irq, void *devid)
{
struct z2_charger *charger = devid;
schedule_work(&charger->bat_work);
return IRQ_HANDLED;
}
static int z2_batt_ps_init(struct z2_charger *charger, int props)
{
int i = 0;
enum power_supply_property *prop;
struct z2_battery_info *info = charger->info;
if (charger->charge_gpiod)
props++; /* POWER_SUPPLY_PROP_STATUS */
if (info->batt_tech >= 0)
props++; /* POWER_SUPPLY_PROP_TECHNOLOGY */
if (info->batt_I2C_reg >= 0)
props++; /* POWER_SUPPLY_PROP_VOLTAGE_NOW */
if (info->max_voltage >= 0)
props++; /* POWER_SUPPLY_PROP_VOLTAGE_MAX */
if (info->min_voltage >= 0)
props++; /* POWER_SUPPLY_PROP_VOLTAGE_MIN */
prop = kcalloc(props, sizeof(*prop), GFP_KERNEL);
if (!prop)
return -ENOMEM;
prop[i++] = POWER_SUPPLY_PROP_PRESENT;
if (charger->charge_gpiod)
prop[i++] = POWER_SUPPLY_PROP_STATUS;
if (info->batt_tech >= 0)
prop[i++] = POWER_SUPPLY_PROP_TECHNOLOGY;
if (info->batt_I2C_reg >= 0)
prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_NOW;
if (info->max_voltage >= 0)
prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MAX;
if (info->min_voltage >= 0)
prop[i++] = POWER_SUPPLY_PROP_VOLTAGE_MIN;
if (!info->batt_name) {
dev_info(&charger->client->dev,
"Please consider setting proper battery "
"name in platform definition file, falling "
"back to name \" Z2_DEFAULT_NAME \"\n");
charger->batt_ps_desc.name = Z2_DEFAULT_NAME;
} else
charger->batt_ps_desc.name = info->batt_name;
charger->batt_ps_desc.properties = prop;
charger->batt_ps_desc.num_properties = props;
charger->batt_ps_desc.type = POWER_SUPPLY_TYPE_BATTERY;
charger->batt_ps_desc.get_property = z2_batt_get_property;
charger->batt_ps_desc.external_power_changed =
z2_batt_ext_power_changed;
charger->batt_ps_desc.use_for_apm = 1;
return 0;
}
static int z2_batt_probe(struct i2c_client *client)
{
int ret = 0;
int props = 1; /* POWER_SUPPLY_PROP_PRESENT */
struct z2_charger *charger;
struct z2_battery_info *info = client->dev.platform_data;
struct power_supply_config psy_cfg = {};
if (info == NULL) {
dev_err(&client->dev,
"Please set platform device platform_data"
" to a valid z2_battery_info pointer!\n");
return -EINVAL;
}
charger = kzalloc(sizeof(*charger), GFP_KERNEL);
if (charger == NULL)
return -ENOMEM;
charger->bat_status = POWER_SUPPLY_STATUS_UNKNOWN;
charger->info = info;
charger->client = client;
i2c_set_clientdata(client, charger);
psy_cfg.drv_data = charger;
mutex_init(&charger->work_lock);
charger->charge_gpiod = devm_gpiod_get_optional(&client->dev,
NULL, GPIOD_IN);
if (IS_ERR(charger->charge_gpiod)) {
ret = dev_err_probe(&client->dev,
PTR_ERR(charger->charge_gpiod),
"failed to get charge GPIO\n");
goto err;
}
if (charger->charge_gpiod) {
gpiod_set_consumer_name(charger->charge_gpiod, "BATT CHRG");
irq_set_irq_type(gpiod_to_irq(charger->charge_gpiod),
IRQ_TYPE_EDGE_BOTH);
ret = request_irq(gpiod_to_irq(charger->charge_gpiod),
z2_charge_switch_irq, 0,
"AC Detect", charger);
if (ret)
goto err;
}
ret = z2_batt_ps_init(charger, props);
if (ret)
goto err3;
INIT_WORK(&charger->bat_work, z2_batt_work);
charger->batt_ps = power_supply_register(&client->dev,
&charger->batt_ps_desc,
&psy_cfg);
if (IS_ERR(charger->batt_ps)) {
ret = PTR_ERR(charger->batt_ps);
goto err4;
}
schedule_work(&charger->bat_work);
return 0;
err4:
kfree(charger->batt_ps_desc.properties);
err3:
if (charger->charge_gpiod)
free_irq(gpiod_to_irq(charger->charge_gpiod), charger);
err:
kfree(charger);
return ret;
}
static void z2_batt_remove(struct i2c_client *client)
{
struct z2_charger *charger = i2c_get_clientdata(client);
cancel_work_sync(&charger->bat_work);
power_supply_unregister(charger->batt_ps);
kfree(charger->batt_ps_desc.properties);
if (charger->charge_gpiod)
free_irq(gpiod_to_irq(charger->charge_gpiod), charger);
kfree(charger);
}
#ifdef CONFIG_PM
static int z2_batt_suspend(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct z2_charger *charger = i2c_get_clientdata(client);
flush_work(&charger->bat_work);
return 0;
}
static int z2_batt_resume(struct device *dev)
{
struct i2c_client *client = to_i2c_client(dev);
struct z2_charger *charger = i2c_get_clientdata(client);
schedule_work(&charger->bat_work);
return 0;
}
static const struct dev_pm_ops z2_battery_pm_ops = {
.suspend = z2_batt_suspend,
.resume = z2_batt_resume,
};
#define Z2_BATTERY_PM_OPS (&z2_battery_pm_ops)
#else
#define Z2_BATTERY_PM_OPS (NULL)
#endif
static const struct i2c_device_id z2_batt_id[] = {
{ "aer915", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, z2_batt_id);
static struct i2c_driver z2_batt_driver = {
.driver = {
.name = "z2-battery",
.pm = Z2_BATTERY_PM_OPS
},
.probe_new = z2_batt_probe,
.remove = z2_batt_remove,
.id_table = z2_batt_id,
};
module_i2c_driver(z2_batt_driver);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Peter Edwards <sweetlilmre@gmail.com>");
MODULE_DESCRIPTION("Zipit Z2 battery driver");
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_Z2_BATTERY_H
#define _LINUX_Z2_BATTERY_H
struct z2_battery_info {
int batt_I2C_bus;
int batt_I2C_addr;
int batt_I2C_reg;
int min_voltage;
int max_voltage;
int batt_div;
int batt_mult;
int batt_tech;
char *batt_name;
};
#endif
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