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power_supply: Add core support for supplied_from

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This patch adds support for supplies to register a list of char *'s which
represent the list of supplies which supply them. This is the opposite as
the supplied_to list.

This change maintains support for supplied_to until all drivers which make
use of it already are converted.

Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Reviewed-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Anton Vorontsov <anton@enomsg.org>
This commit is contained in:
Rhyland Klein 2013-04-01 17:45:54 -04:00 committed by Anton Vorontsov
parent da1233364d
commit 5e0848c602
2 changed files with 37 additions and 13 deletions
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47
drivers/power/power_supply_core.c
View File

@ -26,17 +26,42 @@ EXPORT_SYMBOL_GPL(power_supply_class);
static struct device_type power_supply_dev_type;
static bool __power_supply_is_supplied_by(struct power_supply *supplier,
struct power_supply *supply)
{
int i;
if (!supply->supplied_from && !supplier->supplied_to)
return false;
/* Support both supplied_to and supplied_from modes */
if (supply->supplied_from) {
if (!supplier->name)
return false;
for (i = 0; i < supply->num_supplies; i++)
if (!strcmp(supplier->name, supply->supplied_from[i]))
return true;
} else {
if (!supply->name)
return false;
for (i = 0; i < supplier->num_supplicants; i++)
if (!strcmp(supplier->supplied_to[i], supply->name))
return true;
}
return false;
}
static int __power_supply_changed_work(struct device *dev, void *data)
{
struct power_supply *psy = (struct power_supply *)data;
struct power_supply *pst = dev_get_drvdata(dev);
int i;
for (i = 0; i < psy->num_supplicants; i++)
if (!strcmp(psy->supplied_to[i], pst->name)) {
if (pst->external_power_changed)
pst->external_power_changed(pst);
}
if (__power_supply_is_supplied_by(psy, pst)) {
if (pst->external_power_changed)
pst->external_power_changed(pst);
}
return 0;
}
@ -68,17 +93,13 @@ static int __power_supply_am_i_supplied(struct device *dev, void *data)
union power_supply_propval ret = {0,};
struct power_supply *psy = (struct power_supply *)data;
struct power_supply *epsy = dev_get_drvdata(dev);
int i;
for (i = 0; i < epsy->num_supplicants; i++) {
if (!strcmp(epsy->supplied_to[i], psy->name)) {
if (epsy->get_property(epsy,
POWER_SUPPLY_PROP_ONLINE, &ret))
continue;
if (__power_supply_is_supplied_by(epsy, psy))
if (!epsy->get_property(epsy, POWER_SUPPLY_PROP_ONLINE, &ret)) {
if (ret.intval)
return ret.intval;
}
}
return 0;
}

3
include/linux/power_supply.h
View File

@ -171,6 +171,9 @@ struct power_supply {
char **supplied_to;
size_t num_supplicants;
char **supplied_from;
size_t num_supplies;
int (*get_property)(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val);