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Commit 97749cd9 authored by Alexey Starikovskiy's avatar Alexey Starikovskiy Committed by Len Brown
Browse files

ACPI: Make sysfs interface in ACPI power optional. 

Reference: http://bugzilla.kernel.org/show_bug.cgi?id=9494



Signed-off-by: default avatarAlexey Starikovskiy <astarikovskiy@suse.de>
Signed-off-by: default avatarLen Brown <len.brown@intel.com>
parent e697789d

drivers/acpi/Kconfig

+6 −3
Original line number Diff line number Diff line
@@ -82,6 +82,12 @@ config ACPI_PROCFS_POWER 
	  and functions, which do not yet exist in /sys



	  Say N to delete power /proc/acpi/ folders that have moved to /sys/

config ACPI_SYSFS_POWER

	bool "Future power /sys interface"

	select POWER_SUPPLY

	default y

	---help---

	  Say N to disable power /sys interface

config ACPI_PROC_EVENT

	bool "Deprecated /proc/acpi/event support"

	depends on PROC_FS
@@ -103,7 +109,6 @@ config ACPI_PROC_EVENT 
config ACPI_AC

	tristate "AC Adapter"

	depends on X86

	select POWER_SUPPLY

	default y

	help

	  This driver adds support for the AC Adapter object, which indicates
@@ -113,7 +118,6 @@ config ACPI_AC 
config ACPI_BATTERY

	tristate "Battery"

	depends on X86

	select POWER_SUPPLY

	default y

	help

	  This driver adds support for battery information through
@@ -368,7 +372,6 @@ config ACPI_HOTPLUG_MEMORY 
config ACPI_SBS

	tristate "Smart Battery System"

	depends on X86

	select POWER_SUPPLY

	help

	  This driver adds support for the Smart Battery System, another

	  type of access to battery information, found on some laptops.

drivers/acpi/ac.c

+14 −2
Original line number Diff line number Diff line
@@ -31,7 +31,9 @@ 
#include <linux/proc_fs.h>

#include <linux/seq_file.h>

#endif

#ifdef CONFIG_ACPI_SYSFS_POWER

#include <linux/power_supply.h>

#endif

#include <acpi/acpi_bus.h>

#include <acpi/acpi_drivers.h>
@@ -79,7 +81,9 @@ static struct acpi_driver acpi_ac_driver = { 
};



struct acpi_ac {

#ifdef CONFIG_ACPI_SYSFS_POWER

	struct power_supply charger;

#endif

	struct acpi_device * device;

	unsigned long state;

};
@@ -94,7 +98,7 @@ static const struct file_operations acpi_ac_fops = { 
	.release = single_release,

};

#endif



#ifdef CONFIG_ACPI_SYSFS_POWER

static int get_ac_property(struct power_supply *psy,

			   enum power_supply_property psp,

			   union power_supply_propval *val)
@@ -113,7 +117,7 @@ static int get_ac_property(struct power_supply *psy, 
static enum power_supply_property ac_props[] = {

	POWER_SUPPLY_PROP_ONLINE,

};



#endif

/* --------------------------------------------------------------------------

                               AC Adapter Management

   -------------------------------------------------------------------------- */
@@ -241,7 +245,9 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data) 
		acpi_bus_generate_netlink_event(device->pnp.device_class,

						  device->dev.bus_id, event,

						  (u32) ac->state);

#ifdef CONFIG_ACPI_SYSFS_POWER

		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);

#endif

		break;

	default:

		ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -280,12 +286,14 @@ static int acpi_ac_add(struct acpi_device *device) 
#endif

	if (result)

		goto end;

#ifdef CONFIG_ACPI_SYSFS_POWER

	ac->charger.name = acpi_device_bid(device);

	ac->charger.type = POWER_SUPPLY_TYPE_MAINS;

	ac->charger.properties = ac_props;

	ac->charger.num_properties = ARRAY_SIZE(ac_props);

	ac->charger.get_property = get_ac_property;

	power_supply_register(&ac->device->dev, &ac->charger);

#endif

	status = acpi_install_notify_handler(device->handle,

					     ACPI_ALL_NOTIFY, acpi_ac_notify,

					     ac);
@@ -319,8 +327,10 @@ static int acpi_ac_resume(struct acpi_device *device) 
	old_state = ac->state;

	if (acpi_ac_get_state(ac))

		return 0;

#ifdef CONFIG_ACPI_SYSFS_POWER

	if (old_state != ac->state)

		kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);

#endif

	return 0;

}
@@ -337,8 +347,10 @@ static int acpi_ac_remove(struct acpi_device *device, int type) 


	status = acpi_remove_notify_handler(device->handle,

					    ACPI_ALL_NOTIFY, acpi_ac_notify);

#ifdef CONFIG_ACPI_SYSFS_POWER

	if (ac->charger.dev)

		power_supply_unregister(&ac->charger);

#endif

#ifdef CONFIG_ACPI_PROCFS_POWER

	acpi_ac_remove_fs(device);

#endif

drivers/acpi/battery.c

+25 −6
Original line number Diff line number Diff line
@@ -40,7 +40,9 @@ 
#include <acpi/acpi_bus.h>

#include <acpi/acpi_drivers.h>



#ifdef CONFIG_ACPI_SYSFS_POWER

#include <linux/power_supply.h>

#endif



#define ACPI_BATTERY_VALUE_UNKNOWN 0xFFFFFFFF
@@ -86,7 +88,9 @@ MODULE_DEVICE_TABLE(acpi, battery_device_ids); 


struct acpi_battery {

	struct mutex lock;

#ifdef CONFIG_ACPI_SYSFS_POWER

	struct power_supply bat;

#endif

	struct acpi_device *device;

	unsigned long update_time;

	int current_now;
@@ -117,6 +121,7 @@ inline int acpi_battery_present(struct acpi_battery *battery) 
	return battery->device->status.battery_present;

}



#ifdef CONFIG_ACPI_SYSFS_POWER

static int acpi_battery_technology(struct acpi_battery *battery)

{

	if (!strcasecmp("NiCd", battery->type))
@@ -222,6 +227,7 @@ static enum power_supply_property energy_battery_props[] = { 
	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MANUFACTURER,

};

#endif



#ifdef CONFIG_ACPI_PROCFS_POWER

inline char *acpi_battery_units(struct acpi_battery *battery)
@@ -398,6 +404,7 @@ static int acpi_battery_init_alarm(struct acpi_battery *battery) 
	return acpi_battery_set_alarm(battery);

}



#ifdef CONFIG_ACPI_SYSFS_POWER

static ssize_t acpi_battery_alarm_show(struct device *dev,

					struct device_attribute *attr,

					char *buf)
@@ -429,11 +436,6 @@ static int sysfs_add_battery(struct acpi_battery *battery) 
{

	int result;



	battery->update_time = 0;

	result = acpi_battery_get_info(battery);

	acpi_battery_init_alarm(battery);

	if (result)

		return result;

	if (battery->power_unit) {

		battery->bat.properties = charge_battery_props;

		battery->bat.num_properties =
@@ -462,18 +464,31 @@ static void sysfs_remove_battery(struct acpi_battery *battery) 
	power_supply_unregister(&battery->bat);

	battery->bat.dev = NULL;

}

#endif



static int acpi_battery_update(struct acpi_battery *battery)

{

	int result = acpi_battery_get_status(battery);

	int result;

	result = acpi_battery_get_status(battery);

	if (result)

		return result;

#ifdef CONFIG_ACPI_SYSFS_POWER

	if (!acpi_battery_present(battery)) {

		sysfs_remove_battery(battery);

		battery->update_time = 0;

		return 0;

	}

#endif

	if (!battery->update_time) {

		result = acpi_battery_get_info(battery);

		if (result)

			return result;

		acpi_battery_init_alarm(battery);

	}

#ifdef CONFIG_ACPI_SYSFS_POWER

	if (!battery->bat.dev)

		sysfs_add_battery(battery);

#endif

	return acpi_battery_get_state(battery);

}
@@ -767,9 +782,11 @@ static void acpi_battery_notify(acpi_handle handle, u32 event, void *data) 
	acpi_bus_generate_netlink_event(device->pnp.device_class,

					device->dev.bus_id, event,

					acpi_battery_present(battery));

#ifdef CONFIG_ACPI_SYSFS_POWER

	/* acpi_batter_update could remove power_supply object */

	if (battery->bat.dev)

		kobject_uevent(&battery->bat.dev->kobj, KOBJ_CHANGE);

#endif

}



static int acpi_battery_add(struct acpi_device *device)
@@ -828,7 +845,9 @@ static int acpi_battery_remove(struct acpi_device *device, int type) 
#ifdef CONFIG_ACPI_PROCFS_POWER

	acpi_battery_remove_fs(device);

#endif

#ifdef CONFIG_ACPI_SYSFS_POWER

	sysfs_remove_battery(battery);

#endif

	mutex_destroy(&battery->lock);

	kfree(battery);

	return 0;

drivers/acpi/sbs.c

+22 −1
Original line number Diff line number Diff line
@@ -40,7 +40,9 @@ 
#include <linux/jiffies.h>

#include <linux/delay.h>



#ifdef CONFIG_ACPI_SYSFS_POWER

#include <linux/power_supply.h>

#endif



#include "sbshc.h"
@@ -80,7 +82,9 @@ static const struct acpi_device_id sbs_device_ids[] = { 
MODULE_DEVICE_TABLE(acpi, sbs_device_ids);



struct acpi_battery {

#ifdef CONFIG_ACPI_SYSFS_POWER

	struct power_supply bat;

#endif

	struct acpi_sbs *sbs;

#ifdef CONFIG_ACPI_PROCFS_POWER

	struct proc_dir_entry *proc_entry;
@@ -113,7 +117,9 @@ struct acpi_battery { 
#define to_acpi_battery(x) container_of(x, struct acpi_battery, bat);



struct acpi_sbs {

#ifdef CONFIG_ACPI_SYSFS_POWER

	struct power_supply charger;

#endif

	struct acpi_device *device;

	struct acpi_smb_hc *hc;

	struct mutex lock;
@@ -157,6 +163,7 @@ static inline int acpi_battery_scale(struct acpi_battery *battery) 
	    acpi_battery_ipscale(battery);

}



#ifdef CONFIG_ACPI_SYSFS_POWER

static int sbs_get_ac_property(struct power_supply *psy,

			       enum power_supply_property psp,

			       union power_supply_propval *val)
@@ -294,6 +301,7 @@ static enum power_supply_property sbs_energy_battery_props[] = { 
	POWER_SUPPLY_PROP_MODEL_NAME,

	POWER_SUPPLY_PROP_MANUFACTURER,

};

#endif



/* --------------------------------------------------------------------------

                            Smart Battery System Management
@@ -429,6 +437,7 @@ static int acpi_ac_get_present(struct acpi_sbs *sbs) 
	return result;

}



#ifdef CONFIG_ACPI_SYSFS_POWER

static ssize_t acpi_battery_alarm_show(struct device *dev,

					struct device_attribute *attr,

					char *buf)
@@ -458,6 +467,7 @@ static struct device_attribute alarm_attr = { 
	.show = acpi_battery_alarm_show,

	.store = acpi_battery_alarm_store,

};

#endif



/* --------------------------------------------------------------------------

                              FS Interface (/proc/acpi)
@@ -793,6 +803,7 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id) 
			&acpi_battery_state_fops, &acpi_battery_alarm_fops,

			battery);

#endif

#ifdef CONFIG_ACPI_SYSFS_POWER

	battery->bat.name = battery->name;

	battery->bat.type = POWER_SUPPLY_TYPE_BATTERY;

	if (!acpi_battery_mode(battery)) {
@@ -813,6 +824,7 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id) 
		goto end;

	battery->have_sysfs_alarm = 1;

      end:

#endif

	printk(KERN_INFO PREFIX "%s [%s]: Battery Slot [%s] (battery %s)\n",

	       ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),

	       battery->name, sbs->battery->present ? "present" : "absent");
@@ -822,12 +834,13 @@ static int acpi_battery_add(struct acpi_sbs *sbs, int id) 
static void acpi_battery_remove(struct acpi_sbs *sbs, int id)

{

	struct acpi_battery *battery = &sbs->battery[id];



#ifdef CONFIG_ACPI_SYSFS_POWER

	if (battery->bat.dev) {

		if (battery->have_sysfs_alarm)

			device_remove_file(battery->bat.dev, &alarm_attr);

		power_supply_unregister(&battery->bat);

	}

#endif

#ifdef CONFIG_ACPI_PROCFS_POWER

	if (battery->proc_entry)

		acpi_sbs_remove_fs(&battery->proc_entry, acpi_battery_dir);
@@ -848,12 +861,14 @@ static int acpi_charger_add(struct acpi_sbs *sbs) 
	if (result)

		goto end;

#endif

#ifdef CONFIG_ACPI_SYSFS_POWER

	sbs->charger.name = "sbs-charger";

	sbs->charger.type = POWER_SUPPLY_TYPE_MAINS;

	sbs->charger.properties = sbs_ac_props;

	sbs->charger.num_properties = ARRAY_SIZE(sbs_ac_props);

	sbs->charger.get_property = sbs_get_ac_property;

	power_supply_register(&sbs->device->dev, &sbs->charger);

#endif

	printk(KERN_INFO PREFIX "%s [%s]: AC Adapter [%s] (%s)\n",

	       ACPI_SBS_DEVICE_NAME, acpi_device_bid(sbs->device),

	       ACPI_AC_DIR_NAME, sbs->charger_present ? "on-line" : "off-line");
@@ -863,8 +878,10 @@ static int acpi_charger_add(struct acpi_sbs *sbs) 


static void acpi_charger_remove(struct acpi_sbs *sbs)

{

#ifdef CONFIG_ACPI_SYSFS_POWER

	if (sbs->charger.dev)

		power_supply_unregister(&sbs->charger);

#endif

#ifdef CONFIG_ACPI_PROCFS_POWER

	if (sbs->charger_entry)

		acpi_sbs_remove_fs(&sbs->charger_entry, acpi_ac_dir);
@@ -885,7 +902,9 @@ void acpi_sbs_callback(void *context) 
					      ACPI_SBS_NOTIFY_STATUS,

					      sbs->charger_present);

#endif

#ifdef CONFIG_ACPI_SYSFS_POWER

		kobject_uevent(&sbs->charger.dev->kobj, KOBJ_CHANGE);

#endif

	}

	if (sbs->manager_present) {

		for (id = 0; id < MAX_SBS_BAT; ++id) {
@@ -902,7 +921,9 @@ void acpi_sbs_callback(void *context) 
						      ACPI_SBS_NOTIFY_STATUS,

						      bat->present);

#endif

#ifdef CONFIG_ACPI_SYSFS_POWER

			kobject_uevent(&bat->bat.dev->kobj, KOBJ_CHANGE);

#endif

		}

	}

}