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authorAlexey Starikovskiy <astarikovskiy@suse.de>2007-09-26 11:44:06 -0400
committerLen Brown <len.brown@intel.com>2007-09-27 15:50:23 -0400
commitd5b4a3d0efa36de31b86d5677dad6c36cb8735d7 (patch)
treefc7029b7c7fbab943b1e226b955d974710948126 /drivers
parent8bd955320661cfd03ab8d5574d96aa684acd38f6 (diff)
ACPI: AC: Add sysfs interface
Refer to Documentation/power_supply_class.txt for interface description. Signed-off-by: Alexey Starikovskiy <astarikovskiy@suse.de> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/acpi/Kconfig2
-rw-r--r--drivers/acpi/ac.c33
2 files changed, 32 insertions, 3 deletions
diff --git a/drivers/acpi/Kconfig b/drivers/acpi/Kconfig
index ba6a61f7aae7..a858bc528ec3 100644
--- a/drivers/acpi/Kconfig
+++ b/drivers/acpi/Kconfig
@@ -88,7 +88,7 @@ config ACPI_PROC_EVENT
88 88
89config ACPI_AC 89config ACPI_AC
90 tristate "AC Adapter" 90 tristate "AC Adapter"
91 depends on X86 91 depends on X86 && POWER_SUPPLY
92 default y 92 default y
93 help 93 help
94 This driver adds support for the AC Adapter object, which indicates 94 This driver adds support for the AC Adapter object, which indicates
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 26d70702b313..e03de37a750d 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -29,6 +29,7 @@
29#include <linux/types.h> 29#include <linux/types.h>
30#include <linux/proc_fs.h> 30#include <linux/proc_fs.h>
31#include <linux/seq_file.h> 31#include <linux/seq_file.h>
32#include <linux/power_supply.h>
32#include <acpi/acpi_bus.h> 33#include <acpi/acpi_bus.h>
33#include <acpi/acpi_drivers.h> 34#include <acpi/acpi_drivers.h>
34 35
@@ -72,16 +73,37 @@ static struct acpi_driver acpi_ac_driver = {
72}; 73};
73 74
74struct acpi_ac { 75struct acpi_ac {
76 struct power_supply charger;
75 struct acpi_device * device; 77 struct acpi_device * device;
76 unsigned long state; 78 unsigned long state;
77}; 79};
78 80
81#define to_acpi_ac(x) container_of(x, struct acpi_ac, charger);
82
79static const struct file_operations acpi_ac_fops = { 83static const struct file_operations acpi_ac_fops = {
80 .open = acpi_ac_open_fs, 84 .open = acpi_ac_open_fs,
81 .read = seq_read, 85 .read = seq_read,
82 .llseek = seq_lseek, 86 .llseek = seq_lseek,
83 .release = single_release, 87 .release = single_release,
84}; 88};
89static int get_ac_property(struct power_supply *psy,
90 enum power_supply_property psp,
91 union power_supply_propval *val)
92{
93 struct acpi_ac *ac = to_acpi_ac(psy);
94 switch (psp) {
95 case POWER_SUPPLY_PROP_ONLINE:
96 val->intval = ac->state;
97 break;
98 default:
99 return -EINVAL;
100 }
101 return 0;
102}
103
104static enum power_supply_property ac_props[] = {
105 POWER_SUPPLY_PROP_ONLINE,
106};
85 107
86/* -------------------------------------------------------------------------- 108/* --------------------------------------------------------------------------
87 AC Adapter Management 109 AC Adapter Management
@@ -208,6 +230,7 @@ static void acpi_ac_notify(acpi_handle handle, u32 event, void *data)
208 acpi_bus_generate_netlink_event(device->pnp.device_class, 230 acpi_bus_generate_netlink_event(device->pnp.device_class,
209 device->dev.bus_id, event, 231 device->dev.bus_id, event,
210 (u32) ac->state); 232 (u32) ac->state);
233 kobject_uevent(&ac->charger.dev->kobj, KOBJ_CHANGE);
211 break; 234 break;
212 default: 235 default:
213 ACPI_DEBUG_PRINT((ACPI_DB_INFO, 236 ACPI_DEBUG_PRINT((ACPI_DB_INFO,
@@ -244,7 +267,12 @@ static int acpi_ac_add(struct acpi_device *device)
244 result = acpi_ac_add_fs(device); 267 result = acpi_ac_add_fs(device);
245 if (result) 268 if (result)
246 goto end; 269 goto end;
247 270 ac->charger.name = acpi_device_bid(device);
271 ac->charger.type = POWER_SUPPLY_TYPE_MAINS;
272 ac->charger.properties = ac_props;
273 ac->charger.num_properties = ARRAY_SIZE(ac_props);
274 ac->charger.get_property = get_ac_property;
275 power_supply_register(&ac->device->dev, &ac->charger);
248 status = acpi_install_notify_handler(device->handle, 276 status = acpi_install_notify_handler(device->handle,
249 ACPI_ALL_NOTIFY, acpi_ac_notify, 277 ACPI_ALL_NOTIFY, acpi_ac_notify,
250 ac); 278 ac);
@@ -279,7 +307,8 @@ static int acpi_ac_remove(struct acpi_device *device, int type)
279 307
280 status = acpi_remove_notify_handler(device->handle, 308 status = acpi_remove_notify_handler(device->handle,
281 ACPI_ALL_NOTIFY, acpi_ac_notify); 309 ACPI_ALL_NOTIFY, acpi_ac_notify);
282 310 if (ac->charger.dev)
311 power_supply_unregister(&ac->charger);
283 acpi_ac_remove_fs(device); 312 acpi_ac_remove_fs(device);
284 313
285 kfree(ac); 314 kfree(ac);