pm2301-charger: Wake system when ext charger is plugged-in

When in suspend state, upon plug-in of external AC charger the
device needs to wake-up and charging operation started.

Signed-off-by: Rupesh Kumar <rupesh.kumar@stericsson.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Reviewed-by: Philippe LANGLAIS <philippe.langlais@stericsson.com>

1 files changed, 16 insertions, 1 deletions

diff --git a/drivers/power/pm2301_charger.c b/drivers/power/pm2301_charger.c
index ae647c41c535..b8eafc3850d0 100644
--- a/drivers/power/pm2301_charger.c
+++ b/drivers/power/pm2301_charger.c
@@ -1072,6 +1072,12 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
                 pm2xxx_charger_irq[0].name, pm2->pdata->irq_number, ret);
                 goto unregister_pm2xxx_charger;
         }
+        /* pm interrupt can wake up system */
+        ret = enable_irq_wake(pm2->pdata->irq_number);
+        if (ret) {
+                dev_err(pm2->dev, "failed to set irq wake\n");
+                goto unregister_pm2xxx_interrupt;
+        }
 
         /*Initialize lock*/
         mutex_init(&pm2->lock);
@@ -1084,7 +1090,7 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
         ret = gpio_request(pm2->lpn_pin, "pm2301_lpm_gpio");
         if (ret < 0) {
                 dev_err(pm2->dev, "pm2301_lpm_gpio request failed\n");
-                goto unregister_pm2xxx_charger;
+                goto disable_pm2_irq_wake;
         }
         ret = gpio_direction_output(pm2->lpn_pin, 0);
         if (ret < 0) {
@@ -1115,6 +1121,11 @@ static int pm2xxx_wall_charger_probe(struct i2c_client *i2c_client,
 
 free_gpio:
         gpio_free(pm2->lpn_pin);
+disable_pm2_irq_wake:
+        disable_irq_wake(pm2->pdata->irq_number);
+unregister_pm2xxx_interrupt:
+        /* disable interrupt */
+        free_irq(pm2->pdata->irq_number, pm2);
 unregister_pm2xxx_charger:
         /* unregister power supply */
         power_supply_unregister(&pm2->ac_chg.psy);
@@ -1125,6 +1136,7 @@ free_charger_wq:
         destroy_workqueue(pm2->charger_wq);
 free_device_info:
         kfree(pm2);
+
         return ret;
 }
 
@@ -1135,6 +1147,9 @@ static int pm2xxx_wall_charger_remove(struct i2c_client *i2c_client)
         /* Disable AC charging */
         pm2xxx_charger_ac_en(&pm2->ac_chg, false, 0, 0);
 
+        /* Disable wake by pm interrupt */
+        disable_irq_wake(pm2->pdata->irq_number);
+
         /* Disable interrupts */
         free_irq(pm2->pdata->irq_number, pm2);