Hi,
This series adds a "scope" property to power supplies, so that a power
supply can indicate whether it powers the whole system, or just a
device. This allows upowerd to distinguish between actual system power
supplies, and self-powered devices such as wireless mice.
Thanks,
J
Linux 3.2-rc2 (2011-11-15 15:02:59 -0200)
are available in the git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/jeremy/xen.git power-supply-scope
Jeremy Fitzhardinge (3):
power_supply: add SCOPE property to power supplies
power_supply: allow powered device to be registered with supply
power_supply: add scope properties to some common power_supplies
drivers/acpi/ac.c | 4 ++++
drivers/acpi/battery.c | 5 +++++
drivers/acpi/sbs.c | 9 +++++++++
drivers/hid/hid-wacom.c | 12 ++++++++++--
drivers/hid/hid-wiimote.c | 8 +++++++-
drivers/power/power_supply_core.c | 7 +++++++
drivers/power/power_supply_sysfs.c | 6 ++++++
include/linux/power_supply.h | 8 ++++++++
8 files changed, 56 insertions(+), 3 deletions(-)
diff --git a/drivers/acpi/ac.c b/drivers/acpi/ac.c
index 6512b20..ec36c82 100644
--- a/drivers/acpi/ac.c
+++ b/drivers/acpi/ac.c
@@ -142,6 +142,9 @@ static int get_ac_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_ONLINE:
val->intval = ac->state;
break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ break;
default:
return -EINVAL;
}
@@ -150,6 +153,7 @@ static int get_ac_property(struct power_supply *psy,
static enum power_supply_property ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_SCOPE,
};
#ifdef CONFIG_ACPI_PROCFS_POWER
diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 7711d94..1f68bb6 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -250,6 +250,9 @@ static int acpi_battery_get_property(struct power_supply *psy,
else
val->intval = battery->capacity_now * 1000;
break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = battery->model_number;
break;
@@ -276,6 +279,7 @@ static enum power_supply_property charge_battery_props[] = {
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
@@ -292,6 +296,7 @@ static enum power_supply_property energy_battery_props[] = {
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_NOW,
+ POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
POWER_SUPPLY_PROP_SERIAL_NUMBER,
diff --git a/drivers/acpi/sbs.c b/drivers/acpi/sbs.c
index 6e36d0c..fc35e42 100644
--- a/drivers/acpi/sbs.c
+++ b/drivers/acpi/sbs.c
@@ -171,6 +171,9 @@ static int sbs_get_ac_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_ONLINE:
val->intval = sbs->charger_present;
break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ break;
default:
return -EINVAL;
}
@@ -263,6 +266,9 @@ static int acpi_sbs_battery_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_TEMP:
val->intval = battery->temp_now - 2730; // dK -> dC
break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_SYSTEM;
+ break;
case POWER_SUPPLY_PROP_MODEL_NAME:
val->strval = battery->device_name;
break;
@@ -277,6 +283,7 @@ static int acpi_sbs_battery_get_property(struct power_supply *psy,
static enum power_supply_property sbs_ac_props[] = {
POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_SCOPE,
};
static enum power_supply_property sbs_charge_battery_props[] = {
@@ -292,6 +299,7 @@ static enum power_supply_property sbs_charge_battery_props[] = {
POWER_SUPPLY_PROP_CHARGE_FULL_DESIGN,
POWER_SUPPLY_PROP_CHARGE_FULL,
POWER_SUPPLY_PROP_CHARGE_NOW,
+ POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
@@ -311,6 +319,7 @@ static enum power_supply_property sbs_energy_battery_props[] = {
POWER_SUPPLY_PROP_ENERGY_FULL_DESIGN,
POWER_SUPPLY_PROP_ENERGY_FULL,
POWER_SUPPLY_PROP_ENERGY_NOW,
+ POWER_SUPPLY_PROP_SCOPE,
POWER_SUPPLY_PROP_TEMP,
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
diff --git a/drivers/hid/hid-wacom.c b/drivers/hid/hid-wacom.c
index 17bb88f..ad39777 100644
--- a/drivers/hid/hid-wacom.c
+++ b/drivers/hid/hid-wacom.c
@@ -47,12 +47,14 @@ static unsigned short batcap[8] = { 1, 15, 25, 35, 50, 70, 100, 0 };
static enum power_supply_property wacom_battery_props[] = {
POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_CAPACITY
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_SCOPE,
};
static enum power_supply_property wacom_ac_props[] = {
POWER_SUPPLY_PROP_PRESENT,
- POWER_SUPPLY_PROP_ONLINE
+ POWER_SUPPLY_PROP_ONLINE,
+ POWER_SUPPLY_PROP_SCOPE,
};
static int wacom_battery_get_property(struct power_supply *psy,
@@ -68,6 +70,9 @@ static int wacom_battery_get_property(struct power_supply *psy,
case POWER_SUPPLY_PROP_PRESENT:
val->intval = 1;
break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+ break;
case POWER_SUPPLY_PROP_CAPACITY:
/* show 100% battery capacity when charging */
if (power_state == 0)
@@ -99,6 +104,9 @@ static int wacom_ac_get_property(struct power_supply *psy,
else
val->intval = 0;
break;
+ case POWER_SUPPLY_PROP_SCOPE:
+ val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+ break;
default:
ret = -EINVAL;
break;
diff --git a/drivers/hid/hid-wiimote.c b/drivers/hid/hid-wiimote.c
index 76739c0..98e4828 100644
--- a/drivers/hid/hid-wiimote.c
+++ b/drivers/hid/hid-wiimote.c
@@ -136,7 +136,8 @@ static __u16 wiiproto_keymap[] = {
};
static enum power_supply_property wiimote_battery_props[] = {
- POWER_SUPPLY_PROP_CAPACITY
+ POWER_SUPPLY_PROP_CAPACITY,
+ POWER_SUPPLY_PROP_SCOPE,
};
/* requires the state.lock spinlock to be held */
@@ -468,6 +469,11 @@ static int wiimote_battery_get_property(struct power_supply *psy,
int ret = 0, state;
unsigned long flags;
+ if (psp == POWER_SUPPLY_PROP_SCOPE) {
+ val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+ return 0;
+ }
+
ret = wiimote_cmd_acquire(wdata);
if (ret)
return ret;
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 329b46b..bacf327 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -147,6 +147,12 @@ struct power_supply *power_supply_get_by_name(char *name)
}
EXPORT_SYMBOL_GPL(power_supply_get_by_name);
+
+int power_supply_powers(struct power_supply *psy, struct device *dev)
+{
+ return sysfs_create_link_nowarn(&psy->dev->kobj, &dev->kobj, "powers");
+}
+
static void power_supply_dev_release(struct device *dev)
{
pr_debug("device: '%s': %s\n", dev_name(dev), __func__);
@@ -202,6 +208,7 @@ EXPORT_SYMBOL_GPL(power_supply_register);
void power_supply_unregister(struct power_supply *psy)
{
cancel_work_sync(&psy->changed_work);
+ sysfs_remove_link(&psy->dev->kobj, "powers");
power_supply_remove_triggers(psy);
device_unregister(psy->dev);
}
diff --git a/drivers/power/power_supply_sysfs.c b/drivers/power/power_supply_sysfs.c
index e15d4c9..21178eb 100644
--- a/drivers/power/power_supply_sysfs.c
+++ b/drivers/power/power_supply_sysfs.c
@@ -63,6 +63,9 @@ static ssize_t power_supply_show_property(struct device *dev,
static char *capacity_level_text[] = {
"Unknown", "Critical", "Low", "Normal", "High", "Full"
};
+ static char *scope_text[] = {
+ "Unknown", "System", "Device"
+ };
ssize_t ret = 0;
struct power_supply *psy = dev_get_drvdata(dev);
const ptrdiff_t off = attr - power_supply_attrs;
@@ -95,6 +98,8 @@ static ssize_t power_supply_show_property(struct device *dev,
return sprintf(buf, "%s\n", capacity_level_text[value.intval]);
else if (off == POWER_SUPPLY_PROP_TYPE)
return sprintf(buf, "%s\n", type_text[value.intval]);
+ else if (off == POWER_SUPPLY_PROP_SCOPE)
+ return sprintf(buf, "%s\n", scope_text[value.intval]);
else if (off >= POWER_SUPPLY_PROP_MODEL_NAME)
return sprintf(buf, "%s\n", value.strval);
@@ -167,6 +172,7 @@ static struct device_attribute power_supply_attrs[] = {
POWER_SUPPLY_ATTR(time_to_full_now),
POWER_SUPPLY_ATTR(time_to_full_avg),
POWER_SUPPLY_ATTR(type),
+ POWER_SUPPLY_ATTR(scope),
/* Properties of type `const char *' */
POWER_SUPPLY_ATTR(model_name),
POWER_SUPPLY_ATTR(manufacturer),
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 204c18d..2e3c827 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -74,6 +74,12 @@ enum {
POWER_SUPPLY_CAPACITY_LEVEL_FULL,
};
+enum {
+ POWER_SUPPLY_SCOPE_UNKNOWN = 0,
+ POWER_SUPPLY_SCOPE_SYSTEM,
+ POWER_SUPPLY_SCOPE_DEVICE,
+};
+
enum power_supply_property {
/* Properties of type `int' */
POWER_SUPPLY_PROP_STATUS = 0,
@@ -116,6 +122,7 @@ enum power_supply_property {
POWER_SUPPLY_PROP_TIME_TO_FULL_NOW,
POWER_SUPPLY_PROP_TIME_TO_FULL_AVG,
POWER_SUPPLY_PROP_TYPE, /* use power_supply.type instead */
+ POWER_SUPPLY_PROP_SCOPE,
/* Properties of type `const char *' */
POWER_SUPPLY_PROP_MODEL_NAME,
POWER_SUPPLY_PROP_MANUFACTURER,
@@ -211,6 +218,7 @@ static inline int power_supply_is_system_supplied(void) { return -ENOSYS; }
extern int power_supply_register(struct device *parent,
struct power_supply *psy);
extern void power_supply_unregister(struct power_supply *psy);
+extern int power_supply_powers(struct power_supply *psy, struct device *dev);
/* For APM emulation, think legacy userspace. */
extern struct class *power_supply_class;
--
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