mfd: ab8500-sysctrl: If a charger is present, reboot instead

If a charger is attached on power off, reboot the system
into charging mode instead of powering it off.

Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Jonas Aaberg <jonas.aberg@stericsson.com>
Reviewed-by: Karl KOMIEROWSKI <karl.komierowski@stericsson.com>

diff --git a/drivers/mfd/ab8500-sysctrl.c b/drivers/mfd/ab8500-sysctrl.c
index 888e066c715b870c0553a76f2727652dd0635ec3..188d22b77a284fd538ea42478e6f777a4e3ca60a 100644 (file)
--- a/drivers/mfd/ab8500-sysctrl.c
+++ b/drivers/mfd/ab8500-sysctrl.c
@@ -8,7 +8,9 @@
 #include <linux/module.h>
 #include <linux/platform_device.h>
 #include <linux/pm.h>
+#include <linux/reboot.h>
 #include <linux/signal.h>
+#include <linux/power_supply.h>
 #include <linux/mfd/abx500.h>
 #include <linux/mfd/abx500/ab8500.h>
 #include <linux/mfd/abx500/ab8500-sysctrl.h>
@@ -19,6 +21,31 @@ void ab8500_power_off(void)
 {
        sigset_t old;
        sigset_t all;
+       static char *pss[] = {"ab8500_ac", "ab8500_usb"};
+       int i;
+
+       /*
+        * If we have a charger connected and we're powering off,
+        * reboot into charge-only mode.
+        */
+
+       for (i = 0; i < ARRAY_SIZE(pss); i++) {
+               union power_supply_propval val;
+               struct power_supply *psy;
+               int ret;
+
+               psy = power_supply_get_by_name(pss[i]);
+               if (!psy)
+                       continue;
+               ret = psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &val);
+
+               if (!ret && val.intval) {
+                       printk(KERN_INFO
+                              "Charger \"%s\" is connected. Rebooting.\n",
+                              pss[i]);
+                       machine_restart(NULL);
+               }
+       }
 
        sigfillset(&all);