This patch adds an API in the power supply core to get the
power supply object from supplied_to list based on power
supply attribute(present/online).
Signed-off-by: Ramakrishna Pallala <ramakrishna.pall...@intel.com>
---
drivers/power/power_supply_core.c | 19 +++++++++++++++++++
include/linux/power_supply.h | 3 +++
2 files changed, 22 insertions(+), 0 deletions(-)
diff --git a/drivers/power/power_supply_core.c
b/drivers/power/power_supply_core.c
index ff990d2..8ef1d8b 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -158,6 +158,25 @@ struct power_supply *power_supply_get_by_name(char *name)
}
EXPORT_SYMBOL_GPL(power_supply_get_by_name);
+struct power_supply *power_supply_get_by_suppliedto(struct power_supply *psy,
+ enum power_supply_property psp)
+{
+ union power_supply_propval ret = {0,};
+ struct power_supply *pst;
+ int i;
+
+ for (i = 0; i < psy->num_supplicants; i++) {
+ pst = power_supply_get_by_name(psy->supplied_to[i]);
+ if (!pst || pst->get_property(pst, psp, &ret))
+ continue;
+ if (ret.intval)
+ return pst;
+ }
+
+ return NULL;
+}
+EXPORT_SYMBOL_GPL(power_supply_get_by_suppliedto);
+
int power_supply_powers(struct power_supply *psy, struct device *dev)
{
return sysfs_create_link(&psy->dev->kobj, &dev->kobj, "powers");
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 0bafbb1..2fdcf77 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -219,6 +219,9 @@ struct power_supply_info {
};
extern struct power_supply *power_supply_get_by_name(char *name);
+extern struct power_supply *power_supply_get_by_suppliedto(
+ struct power_supply *psy,
+ enum power_supply_property psp);
extern void power_supply_changed(struct power_supply *psy);
extern int power_supply_am_i_supplied(struct power_supply *psy);
extern int power_supply_set_battery_charged(struct power_supply *psy);
--
1.7.0.4
--
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