Add support to change the shutdown threshold.

The default value for shutdown is less than 5% of battery life left.
Once the system hits this value (or the one specified by the user) the
system will shutdown.

The soc_shutdown value can be changed to 0 to disable this feature, just
realise that the system will lose power and unsafely shutdown.

Also added install and remove functionality.

battery/install

@@ -1,8 +1,10 @@
-
+#!/bin/bash
 sudo cp -vf oneUpPower.ko /lib/modules/`uname -r`/kernel/drivers/power/supply/oneUpPower.ko
+if ! grep -qF "oneUpPower" /etc/modules
+then
+    sudo sh -c 'echo "oneUpPower" >> /etc/modules'
+fi
+sudo sh -c 'echo "options oneUpPower soc_shutdown=5" > /etc/modprobe.d/oneUpPower.conf'
 sudo depmod -a
-ls /lib/modules/`uname -r`/kernel/drivers/power/supply/
 sudo insmod oneUpPower.ko
 sync
-
-

battery/oneUpPower.c

@@ -83,6 +83,7 @@ struct PowerStatus {
 static int get_battery_property(struct power_supply *psy,
                                 enum power_supply_property psp,
                                 union power_supply_propval *val);
+
 static int get_ac_property(struct power_supply *psy,
                            enum power_supply_property psp,
                            union power_supply_propval *val );
@@ -90,7 +91,7 @@ static int get_ac_property(struct power_supply *psy,
 //
 // Globals
 //
-static int critical_power_level         = 5;	     // Default setting is 5% of power left for critical
+static int soc_shutdown                 = 5;	     // Default setting is 5% of power left for critical
 static int ac_online                    = 1;	     // Are we connected to an external power source?
 static bool module_initialized          = false;     // Has the driver been initialized?
 static struct task_struct *monitor_task = NULL;      // Place to store the monito task...
@@ -354,7 +355,7 @@ static int system_monitor( void *args )
             soc        = check_battery_state( client );
 
             set_current_state( TASK_INTERRUPTIBLE );
-            if( !plugged_in && (soc < critical_power_level) ){
+            if( !plugged_in && (soc < soc_shutdown) ){
                 // not pluggged in and below critical state, shutdown
                 PR_INFO( "Performing system shutdown unplugged and power is at %d\n",soc);
                 shutdown_helper();
@@ -607,6 +608,43 @@ static void __exit oneup_power_exit(void)
 }
 module_exit(oneup_power_exit);
 
+static int param_set_soc_shutdown( const char *key, const struct kernel_param *kp )
+{
+    long soc;
+
+    if( kstrtol( key, 10, &soc  ) == 0 ){
+        if( soc == 0 ){
+            PR_INFO( "Disabling automatic shutdown when battery is below threshold.\n");
+            soc_shutdown = 0;
+	    return 0;
+        }
+        else if( (soc > 1) && (soc < 20)){
+            PR_INFO( "Changing automatic shutdown when battery is below %ld%%\n",soc);
+            soc_shutdown = soc;
+            return 0;
+        } else {
+	    PR_INFO( "Invalid value, 0 to disable, 1 -> 20 to shutdown.\n" );
+	}
+    } else {
+        PR_INFO( "Could not convert to integer\n" );
+    }
+    return -ENOENT;
+}
+
+static int param_get_soc_shutdown( char *buffer, const struct kernel_param *kp )
+{
+    return sprintf( buffer, "%d", soc_shutdown );
+}
+
+static const struct kernel_param_ops param_ops_soc_shutdown = {
+    .set = param_set_soc_shutdown,
+    .get = param_get_soc_shutdown,
+};
+
+#define param_check_soc_shutdown(name,p) __param_check(name,p,void);
+module_param( soc_shutdown, soc_shutdown, 0644 );
+MODULE_PARM_DESC(soc_shutdown, "Shutdown system when the battery state of charge is lower than this value.");
+
 MODULE_DESCRIPTION("Power supply driver for Argon40 1UP");
 MODULE_AUTHOR("Jeff Curless <jeff@thecurlesses.com>");
 MODULE_LICENSE("GPL");

battery/remove

@@ -1 +1,7 @@
+#!/bin/bash
 sudo rmmod oneUpPower
+sudo rm -vf /lib/modules/`uname -r`/kernel/drivers/power/supply/oneUpPower.ko
+sudo sh -c "sed -i '/oneUpPower/d' /etc/modules"
+sudo rm -vf /etc/modprobe.d/oneUpPower.conf
+sudo depmod -a
+sync