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: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>

drivers/power/supply/Kconfig

@@ -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

drivers/power/supply/Makefile

@@ -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

drivers/power/supply/z2_battery.c

-// 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");

include/linux/z2_battery.h

-/* 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