With the addition of the device_nodes to use to link suppliers and
supplicants, its useful to add logic to handle the creation of
the list in a common place so as to be common for all drivers.
As of now, as long as the supply's device_node is supplied, the core
will attempt to parse the list of supplies and store it in the
power_supply structure. In this way, it shouldn't break existing
drivers, but allow for transition cleanly.
Signed-off-by: Rhyland Klein <rklein@xxxxxxxxxx>
---
v2:
- Simplified and renamed the logic to parse dt for the charger list.
- Tied the dt parsing directly to power_supply_register to make fewer
changes required for converting existing chargers/supplies.
drivers/power/power_supply_core.c | 35 +++++++++++++++++++++++++++++++++++
1 file changed, 35 insertions(+)
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c
index a87c5b8..05e2031 100644
--- a/drivers/power/power_supply_core.c
+++ b/drivers/power/power_supply_core.c
@@ -86,6 +86,39 @@ void power_supply_changed(struct power_supply *psy)
}
EXPORT_SYMBOL_GPL(power_supply_changed);
+#ifdef CONFIG_OF
+#include <linux/of.h>
+
+int power_supply_register_supplicant(struct power_supply *psy)
+{
+ struct device_node *np;
+ int i = 0;
+
+ if (!psy->supplies.node)
+ return -EINVAL;
+
+ do {
+ struct power_supply_supplies *lst;
+
+ np = of_parse_phandle(psy->supplies.node, "power-supply", i++);
+ if (!np)
+ continue;
+
+ lst = devm_kzalloc(psy->dev->parent, sizeof(*lst), GFP_KERNEL);
+ if (!lst) {
+ dev_warn(psy->dev->parent,
+ "Failed to alloc mem for supplies list\n");
+ return -ENOMEM;
+ }
+
+ lst->node = np;
+ list_add(&(lst->list), &(psy->supplies.list));
+ } while (np);
+
+ return 0;
+}
+#endif
+
static int __power_supply_am_i_supplied(struct device *dev, void *data)
{
union power_supply_propval ret = {0,};
@@ -355,6 +388,8 @@ int power_supply_register(struct device *parent, struct power_supply *psy)
#ifdef CONFIG_OF
INIT_LIST_HEAD(&psy->supplies.list);
+
+ power_supply_register_supplicant(psy);
#endif
INIT_WORK(&psy->changed_work, power_supply_changed_work);
--
1.7.9.5
--
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