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authorRhyland Klein <rklein@nvidia.com>2013-04-01 17:45:54 -0400
committerAnton Vorontsov <anton@enomsg.org>2013-04-16 18:35:31 -0700
commit5e0848c6026ab98f47e0e179f5c76875cd509d58 (patch)
tree332ee36d2d55cdc610e81d8d9549b8bc989bf5ca /drivers/power
parentda1233364d51947d8c84a33e200fcfb177ee9f20 (diff)
downloadlinux-linaro-stable-5e0848c6026ab98f47e0e179f5c76875cd509d58.tar.gz
power_supply: Add core support for supplied_from
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>
Diffstat (limited to 'drivers/power')
-rw-r--r--drivers/power/power_supply_core.c47
1 files changed, 34 insertions, 13 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index 5deac432e2ae..d843cc9df030 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -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;
}