power: remove pda_power supply driver

This driver was used for a couple of Intel PXA and Samsung S3C24xx
based PDAs, but all of those are now removed from the kernel, so
the driver itself is no longer useful.

Cc: Anton Vorontsov <cbou@mail.ru>
Cc: linux-pm@vger.kernel.org
Acked-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Acked-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
This commit is contained in:
Arnd Bergmann 2022-10-06 17:52:11 +02:00
parent b401d1fd80
commit 0f9b85edca
6 changed files with 2 additions and 572 deletions

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@ -40,8 +40,8 @@ kind of power supply, and can process/present them to a user in consistent
manner. Results for different power supplies and machines are also directly manner. Results for different power supplies and machines are also directly
comparable. comparable.
See drivers/power/supply/ds2760_battery.c and drivers/power/supply/pda_power.c See drivers/power/supply/ds2760_battery.c for the example how to declare
for the example how to declare and handle attributes. and handle attributes.
Units Units

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@ -19,7 +19,6 @@
#include <linux/of_fdt.h> #include <linux/of_fdt.h>
#include <linux/of.h> #include <linux/of.h>
#include <linux/of_platform.h> #include <linux/of_platform.h>
#include <linux/pda_power.h>
#include <linux/platform_device.h> #include <linux/platform_device.h>
#include <linux/serial_8250.h> #include <linux/serial_8250.h>
#include <linux/slab.h> #include <linux/slab.h>

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@ -28,15 +28,6 @@ config POWER_SUPPLY_HWMON
Say 'Y' here if you want power supplies to Say 'Y' here if you want power supplies to
have hwmon sysfs interface too. have hwmon sysfs interface too.
config PDA_POWER
tristate "Generic PDA/phone power driver"
depends on !S390
help
Say Y here to enable generic power driver for PDAs and phones with
one or two external power supplies (AC/USB) connected to main and
backup batteries, and optional builtin charger.
config APM_POWER config APM_POWER
tristate "APM emulation for class batteries" tristate "APM emulation for class batteries"
depends on APM_EMULATION depends on APM_EMULATION

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@ -9,7 +9,6 @@ obj-$(CONFIG_POWER_SUPPLY) += power_supply.o
obj-$(CONFIG_POWER_SUPPLY_HWMON) += power_supply_hwmon.o obj-$(CONFIG_POWER_SUPPLY_HWMON) += power_supply_hwmon.o
obj-$(CONFIG_GENERIC_ADC_BATTERY) += generic-adc-battery.o obj-$(CONFIG_GENERIC_ADC_BATTERY) += generic-adc-battery.o
obj-$(CONFIG_PDA_POWER) += pda_power.o
obj-$(CONFIG_APM_POWER) += apm_power.o obj-$(CONFIG_APM_POWER) += apm_power.o
obj-$(CONFIG_AXP20X_POWER) += axp20x_usb_power.o obj-$(CONFIG_AXP20X_POWER) += axp20x_usb_power.o
obj-$(CONFIG_IP5XXX_POWER) += ip5xxx_power.o obj-$(CONFIG_IP5XXX_POWER) += ip5xxx_power.o

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@ -1,520 +0,0 @@
// SPDX-License-Identifier: GPL-2.0-only
/*
* Common power driver for PDAs and phones with one or two external
* power supplies (AC/USB) connected to main and backup batteries,
* and optional builtin charger.
*
* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
*/
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/err.h>
#include <linux/interrupt.h>
#include <linux/notifier.h>
#include <linux/power_supply.h>
#include <linux/pda_power.h>
#include <linux/regulator/consumer.h>
#include <linux/timer.h>
#include <linux/jiffies.h>
#include <linux/usb/otg.h>
static inline unsigned int get_irq_flags(struct resource *res)
{
return IRQF_SHARED | (res->flags & IRQF_TRIGGER_MASK);
}
static struct device *dev;
static struct pda_power_pdata *pdata;
static struct resource *ac_irq, *usb_irq;
static struct delayed_work charger_work;
static struct delayed_work polling_work;
static struct delayed_work supply_work;
static int polling;
static struct power_supply *pda_psy_ac, *pda_psy_usb;
#if IS_ENABLED(CONFIG_USB_PHY)
static struct usb_phy *transceiver;
static struct notifier_block otg_nb;
#endif
static struct regulator *ac_draw;
enum {
PDA_PSY_OFFLINE = 0,
PDA_PSY_ONLINE = 1,
PDA_PSY_TO_CHANGE,
};
static int new_ac_status = -1;
static int new_usb_status = -1;
static int ac_status = -1;
static int usb_status = -1;
static int pda_power_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
switch (psp) {
case POWER_SUPPLY_PROP_ONLINE:
if (psy->desc->type == POWER_SUPPLY_TYPE_MAINS)
val->intval = pdata->is_ac_online ?
pdata->is_ac_online() : 0;
else
val->intval = pdata->is_usb_online ?
pdata->is_usb_online() : 0;
break;
default:
return -EINVAL;
}
return 0;
}
static enum power_supply_property pda_power_props[] = {
POWER_SUPPLY_PROP_ONLINE,
};
static char *pda_power_supplied_to[] = {
"main-battery",
"backup-battery",
};
static const struct power_supply_desc pda_psy_ac_desc = {
.name = "ac",
.type = POWER_SUPPLY_TYPE_MAINS,
.properties = pda_power_props,
.num_properties = ARRAY_SIZE(pda_power_props),
.get_property = pda_power_get_property,
};
static const struct power_supply_desc pda_psy_usb_desc = {
.name = "usb",
.type = POWER_SUPPLY_TYPE_USB,
.properties = pda_power_props,
.num_properties = ARRAY_SIZE(pda_power_props),
.get_property = pda_power_get_property,
};
static void update_status(void)
{
if (pdata->is_ac_online)
new_ac_status = !!pdata->is_ac_online();
if (pdata->is_usb_online)
new_usb_status = !!pdata->is_usb_online();
}
static void update_charger(void)
{
static int regulator_enabled;
int max_uA = pdata->ac_max_uA;
if (pdata->set_charge) {
if (new_ac_status > 0) {
dev_dbg(dev, "charger on (AC)\n");
pdata->set_charge(PDA_POWER_CHARGE_AC);
} else if (new_usb_status > 0) {
dev_dbg(dev, "charger on (USB)\n");
pdata->set_charge(PDA_POWER_CHARGE_USB);
} else {
dev_dbg(dev, "charger off\n");
pdata->set_charge(0);
}
} else if (ac_draw) {
if (new_ac_status > 0) {
regulator_set_current_limit(ac_draw, max_uA, max_uA);
if (!regulator_enabled) {
dev_dbg(dev, "charger on (AC)\n");
WARN_ON(regulator_enable(ac_draw));
regulator_enabled = 1;
}
} else {
if (regulator_enabled) {
dev_dbg(dev, "charger off\n");
WARN_ON(regulator_disable(ac_draw));
regulator_enabled = 0;
}
}
}
}
static void supply_work_func(struct work_struct *work)
{
if (ac_status == PDA_PSY_TO_CHANGE) {
ac_status = new_ac_status;
power_supply_changed(pda_psy_ac);
}
if (usb_status == PDA_PSY_TO_CHANGE) {
usb_status = new_usb_status;
power_supply_changed(pda_psy_usb);
}
}
static void psy_changed(void)
{
update_charger();
/*
* Okay, charger set. Now wait a bit before notifying supplicants,
* charge power should stabilize.
*/
cancel_delayed_work(&supply_work);
schedule_delayed_work(&supply_work,
msecs_to_jiffies(pdata->wait_for_charger));
}
static void charger_work_func(struct work_struct *work)
{
update_status();
psy_changed();
}
static irqreturn_t power_changed_isr(int irq, void *power_supply)
{
if (power_supply == pda_psy_ac)
ac_status = PDA_PSY_TO_CHANGE;
else if (power_supply == pda_psy_usb)
usb_status = PDA_PSY_TO_CHANGE;
else
return IRQ_NONE;
/*
* Wait a bit before reading ac/usb line status and setting charger,
* because ac/usb status readings may lag from irq.
*/
cancel_delayed_work(&charger_work);
schedule_delayed_work(&charger_work,
msecs_to_jiffies(pdata->wait_for_status));
return IRQ_HANDLED;
}
static void polling_work_func(struct work_struct *work)
{
int changed = 0;
dev_dbg(dev, "polling...\n");
update_status();
if (!ac_irq && new_ac_status != ac_status) {
ac_status = PDA_PSY_TO_CHANGE;
changed = 1;
}
if (!usb_irq && new_usb_status != usb_status) {
usb_status = PDA_PSY_TO_CHANGE;
changed = 1;
}
if (changed)
psy_changed();
cancel_delayed_work(&polling_work);
schedule_delayed_work(&polling_work,
msecs_to_jiffies(pdata->polling_interval));
}
#if IS_ENABLED(CONFIG_USB_PHY)
static int otg_is_usb_online(void)
{
return (transceiver->last_event == USB_EVENT_VBUS ||
transceiver->last_event == USB_EVENT_ENUMERATED);
}
static int otg_is_ac_online(void)
{
return (transceiver->last_event == USB_EVENT_CHARGER);
}
static int otg_handle_notification(struct notifier_block *nb,
unsigned long event, void *unused)
{
switch (event) {
case USB_EVENT_CHARGER:
ac_status = PDA_PSY_TO_CHANGE;
break;
case USB_EVENT_VBUS:
case USB_EVENT_ENUMERATED:
usb_status = PDA_PSY_TO_CHANGE;
break;
case USB_EVENT_NONE:
ac_status = PDA_PSY_TO_CHANGE;
usb_status = PDA_PSY_TO_CHANGE;
break;
default:
return NOTIFY_OK;
}
/*
* Wait a bit before reading ac/usb line status and setting charger,
* because ac/usb status readings may lag from irq.
*/
cancel_delayed_work(&charger_work);
schedule_delayed_work(&charger_work,
msecs_to_jiffies(pdata->wait_for_status));
return NOTIFY_OK;
}
#endif
static int pda_power_probe(struct platform_device *pdev)
{
struct power_supply_config psy_cfg = {};
int ret = 0;
dev = &pdev->dev;
if (pdev->id != -1) {
dev_err(dev, "it's meaningless to register several "
"pda_powers; use id = -1\n");
ret = -EINVAL;
goto wrongid;
}
pdata = pdev->dev.platform_data;
if (pdata->init) {
ret = pdata->init(dev);
if (ret < 0)
goto init_failed;
}
ac_draw = regulator_get(dev, "ac_draw");
if (IS_ERR(ac_draw)) {
dev_dbg(dev, "couldn't get ac_draw regulator\n");
ac_draw = NULL;
}
update_status();
update_charger();
if (!pdata->wait_for_status)
pdata->wait_for_status = 500;
if (!pdata->wait_for_charger)
pdata->wait_for_charger = 500;
if (!pdata->polling_interval)
pdata->polling_interval = 2000;
if (!pdata->ac_max_uA)
pdata->ac_max_uA = 500000;
INIT_DELAYED_WORK(&charger_work, charger_work_func);
INIT_DELAYED_WORK(&supply_work, supply_work_func);
ac_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "ac");
usb_irq = platform_get_resource_byname(pdev, IORESOURCE_IRQ, "usb");
if (pdata->supplied_to) {
psy_cfg.supplied_to = pdata->supplied_to;
psy_cfg.num_supplicants = pdata->num_supplicants;
} else {
psy_cfg.supplied_to = pda_power_supplied_to;
psy_cfg.num_supplicants = ARRAY_SIZE(pda_power_supplied_to);
}
#if IS_ENABLED(CONFIG_USB_PHY)
transceiver = usb_get_phy(USB_PHY_TYPE_USB2);
if (!IS_ERR_OR_NULL(transceiver)) {
if (!pdata->is_usb_online)
pdata->is_usb_online = otg_is_usb_online;
if (!pdata->is_ac_online)
pdata->is_ac_online = otg_is_ac_online;
}
#endif
if (pdata->is_ac_online) {
pda_psy_ac = power_supply_register(&pdev->dev,
&pda_psy_ac_desc, &psy_cfg);
if (IS_ERR(pda_psy_ac)) {
dev_err(dev, "failed to register %s power supply\n",
pda_psy_ac_desc.name);
ret = PTR_ERR(pda_psy_ac);
goto ac_supply_failed;
}
if (ac_irq) {
ret = request_irq(ac_irq->start, power_changed_isr,
get_irq_flags(ac_irq), ac_irq->name,
pda_psy_ac);
if (ret) {
dev_err(dev, "request ac irq failed\n");
goto ac_irq_failed;
}
} else {
polling = 1;
}
}
if (pdata->is_usb_online) {
pda_psy_usb = power_supply_register(&pdev->dev,
&pda_psy_usb_desc,
&psy_cfg);
if (IS_ERR(pda_psy_usb)) {
dev_err(dev, "failed to register %s power supply\n",
pda_psy_usb_desc.name);
ret = PTR_ERR(pda_psy_usb);
goto usb_supply_failed;
}
if (usb_irq) {
ret = request_irq(usb_irq->start, power_changed_isr,
get_irq_flags(usb_irq),
usb_irq->name, pda_psy_usb);
if (ret) {
dev_err(dev, "request usb irq failed\n");
goto usb_irq_failed;
}
} else {
polling = 1;
}
}
#if IS_ENABLED(CONFIG_USB_PHY)
if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier) {
otg_nb.notifier_call = otg_handle_notification;
ret = usb_register_notifier(transceiver, &otg_nb);
if (ret) {
dev_err(dev, "failure to register otg notifier\n");
goto otg_reg_notifier_failed;
}
polling = 0;
}
#endif
if (polling) {
dev_dbg(dev, "will poll for status\n");
INIT_DELAYED_WORK(&polling_work, polling_work_func);
cancel_delayed_work(&polling_work);
schedule_delayed_work(&polling_work,
msecs_to_jiffies(pdata->polling_interval));
}
if (ac_irq || usb_irq)
device_init_wakeup(&pdev->dev, 1);
return 0;
#if IS_ENABLED(CONFIG_USB_PHY)
otg_reg_notifier_failed:
if (pdata->is_usb_online && usb_irq)
free_irq(usb_irq->start, pda_psy_usb);
#endif
usb_irq_failed:
if (pdata->is_usb_online)
power_supply_unregister(pda_psy_usb);
usb_supply_failed:
if (pdata->is_ac_online && ac_irq)
free_irq(ac_irq->start, pda_psy_ac);
#if IS_ENABLED(CONFIG_USB_PHY)
if (!IS_ERR_OR_NULL(transceiver))
usb_put_phy(transceiver);
#endif
ac_irq_failed:
if (pdata->is_ac_online)
power_supply_unregister(pda_psy_ac);
ac_supply_failed:
if (ac_draw) {
regulator_put(ac_draw);
ac_draw = NULL;
}
if (pdata->exit)
pdata->exit(dev);
init_failed:
wrongid:
return ret;
}
static int pda_power_remove(struct platform_device *pdev)
{
#if IS_ENABLED(CONFIG_USB_PHY)
if (!IS_ERR_OR_NULL(transceiver) && pdata->use_otg_notifier)
usb_unregister_notifier(transceiver, &otg_nb);
#endif
if (pdata->is_usb_online && usb_irq)
free_irq(usb_irq->start, pda_psy_usb);
if (pdata->is_ac_online && ac_irq)
free_irq(ac_irq->start, pda_psy_ac);
if (polling)
cancel_delayed_work_sync(&polling_work);
cancel_delayed_work_sync(&charger_work);
cancel_delayed_work_sync(&supply_work);
if (pdata->is_usb_online)
power_supply_unregister(pda_psy_usb);
if (pdata->is_ac_online)
power_supply_unregister(pda_psy_ac);
#if IS_ENABLED(CONFIG_USB_PHY)
if (!IS_ERR_OR_NULL(transceiver))
usb_put_phy(transceiver);
#endif
if (ac_draw) {
regulator_put(ac_draw);
ac_draw = NULL;
}
if (pdata->exit)
pdata->exit(dev);
return 0;
}
#ifdef CONFIG_PM
static int ac_wakeup_enabled;
static int usb_wakeup_enabled;
static int pda_power_suspend(struct platform_device *pdev, pm_message_t state)
{
if (pdata->suspend) {
int ret = pdata->suspend(state);
if (ret)
return ret;
}
if (device_may_wakeup(&pdev->dev)) {
if (ac_irq)
ac_wakeup_enabled = !enable_irq_wake(ac_irq->start);
if (usb_irq)
usb_wakeup_enabled = !enable_irq_wake(usb_irq->start);
}
return 0;
}
static int pda_power_resume(struct platform_device *pdev)
{
if (device_may_wakeup(&pdev->dev)) {
if (usb_irq && usb_wakeup_enabled)
disable_irq_wake(usb_irq->start);
if (ac_irq && ac_wakeup_enabled)
disable_irq_wake(ac_irq->start);
}
if (pdata->resume)
return pdata->resume();
return 0;
}
#else
#define pda_power_suspend NULL
#define pda_power_resume NULL
#endif /* CONFIG_PM */
static struct platform_driver pda_power_pdrv = {
.driver = {
.name = "pda-power",
},
.probe = pda_power_probe,
.remove = pda_power_remove,
.suspend = pda_power_suspend,
.resume = pda_power_resume,
};
module_platform_driver(pda_power_pdrv);
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Anton Vorontsov <cbou@mail.ru>");
MODULE_ALIAS("platform:pda-power");

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@ -1,39 +0,0 @@
/* SPDX-License-Identifier: GPL-2.0-only */
/*
* Common power driver for PDAs and phones with one or two external
* power supplies (AC/USB) connected to main and backup batteries,
* and optional builtin charger.
*
* Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
*/
#ifndef __PDA_POWER_H__
#define __PDA_POWER_H__
#define PDA_POWER_CHARGE_AC (1 << 0)
#define PDA_POWER_CHARGE_USB (1 << 1)
struct device;
struct pda_power_pdata {
int (*init)(struct device *dev);
int (*is_ac_online)(void);
int (*is_usb_online)(void);
void (*set_charge)(int flags);
void (*exit)(struct device *dev);
int (*suspend)(pm_message_t state);
int (*resume)(void);
char **supplied_to;
size_t num_supplicants;
unsigned int wait_for_status; /* msecs, default is 500 */
unsigned int wait_for_charger; /* msecs, default is 500 */
unsigned int polling_interval; /* msecs, default is 2000 */
unsigned long ac_max_uA; /* current to draw when on AC */
bool use_otg_notifier;
};
#endif /* __PDA_POWER_H__ */