olpc_battery: Add wakeup support

Battery and AC events can now be used to wake up the system from suspend.

Signed-off-by: Daniel Drake <dsd@laptop.org>
Acked-by: Andres Salomon <dilinger@queued.net>
Signed-off-by: Anton Vorontsov <cbouatmailru@gmail.com>

1 files changed, 24 insertions, 0 deletions

diff --git a/drivers/power/olpc_battery.c b/drivers/power/olpc_battery.c
index 9972268fea72..46a2f07edab1 100644
--- a/drivers/power/olpc_battery.c
+++ b/drivers/power/olpc_battery.c
@@ -533,6 +533,24 @@ void olpc_battery_trigger_uevent(unsigned long cause)
                 kobject_uevent(&olpc_bat.dev->kobj, KOBJ_CHANGE);
 }
 
+static int olpc_battery_suspend(struct platform_device *pdev,
+                                pm_message_t state)
+{
+        if (device_may_wakeup(olpc_ac.dev))
+                olpc_ec_wakeup_set(EC_SCI_SRC_ACPWR);
+        else
+                olpc_ec_wakeup_clear(EC_SCI_SRC_ACPWR);
+
+        if (device_may_wakeup(olpc_bat.dev))
+                olpc_ec_wakeup_set(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
+                                   | EC_SCI_SRC_BATERR);
+        else
+                olpc_ec_wakeup_clear(EC_SCI_SRC_BATTERY | EC_SCI_SRC_BATSOC
+                                     | EC_SCI_SRC_BATERR);
+
+        return 0;
+}
+
 static int __devinit olpc_battery_probe(struct platform_device *pdev)
 {
         int ret;
@@ -578,6 +596,11 @@ static int __devinit olpc_battery_probe(struct platform_device *pdev)
         if (ret)
                 goto error_failed;
 
+        if (olpc_ec_wakeup_available()) {
+                device_set_wakeup_capable(olpc_ac.dev, true);
+                device_set_wakeup_capable(olpc_bat.dev, true);
+        }
+
         return 0;
 
 error_failed:
@@ -612,6 +635,7 @@ static struct platform_driver olpc_battery_drv = {
         },
         .probe = olpc_battery_probe,
         .remove = __devexit_p(olpc_battery_remove),
+        .suspend = olpc_battery_suspend,
 };
 
 static int __init olpc_bat_init(void)