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path: root/drivers/power/power_supply_leds.c
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Diffstat (limited to 'drivers/power/power_supply_leds.c')
-rw-r--r--drivers/power/power_supply_leds.c170
1 files changed, 170 insertions, 0 deletions
diff --git a/drivers/power/power_supply_leds.c b/drivers/power/power_supply_leds.c
new file mode 100644
index 000000000..2d41a43fc
--- /dev/null
+++ b/drivers/power/power_supply_leds.c
@@ -0,0 +1,170 @@
+/*
+ * LEDs triggers for power supply class
+ *
+ * Copyright © 2007 Anton Vorontsov <cbou@mail.ru>
+ * Copyright © 2004 Szabolcs Gyurko
+ * Copyright © 2003 Ian Molton <spyro@f2s.com>
+ *
+ * Modified: 2004, Oct Szabolcs Gyurko
+ *
+ * You may use this code as per GPL version 2
+ */
+
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/power_supply.h>
+#include <linux/slab.h>
+
+#include "power_supply.h"
+
+/* Battery specific LEDs triggers. */
+
+static void power_supply_update_bat_leds(struct power_supply *psy)
+{
+ union power_supply_propval status;
+ unsigned long delay_on = 0;
+ unsigned long delay_off = 0;
+
+ if (psy->desc->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status))
+ return;
+
+ dev_dbg(&psy->dev, "%s %d\n", __func__, status.intval);
+
+ switch (status.intval) {
+ case POWER_SUPPLY_STATUS_FULL:
+ led_trigger_event(psy->charging_full_trig, LED_FULL);
+ led_trigger_event(psy->charging_trig, LED_OFF);
+ led_trigger_event(psy->full_trig, LED_FULL);
+ led_trigger_event(psy->charging_blink_full_solid_trig,
+ LED_FULL);
+ break;
+ case POWER_SUPPLY_STATUS_CHARGING:
+ led_trigger_event(psy->charging_full_trig, LED_FULL);
+ led_trigger_event(psy->charging_trig, LED_FULL);
+ led_trigger_event(psy->full_trig, LED_OFF);
+ led_trigger_blink(psy->charging_blink_full_solid_trig,
+ &delay_on, &delay_off);
+ break;
+ default:
+ led_trigger_event(psy->charging_full_trig, LED_OFF);
+ led_trigger_event(psy->charging_trig, LED_OFF);
+ led_trigger_event(psy->full_trig, LED_OFF);
+ led_trigger_event(psy->charging_blink_full_solid_trig,
+ LED_OFF);
+ break;
+ }
+}
+
+static int power_supply_create_bat_triggers(struct power_supply *psy)
+{
+ psy->charging_full_trig_name = kasprintf(GFP_KERNEL,
+ "%s-charging-or-full", psy->desc->name);
+ if (!psy->charging_full_trig_name)
+ goto charging_full_failed;
+
+ psy->charging_trig_name = kasprintf(GFP_KERNEL,
+ "%s-charging", psy->desc->name);
+ if (!psy->charging_trig_name)
+ goto charging_failed;
+
+ psy->full_trig_name = kasprintf(GFP_KERNEL, "%s-full", psy->desc->name);
+ if (!psy->full_trig_name)
+ goto full_failed;
+
+ psy->charging_blink_full_solid_trig_name = kasprintf(GFP_KERNEL,
+ "%s-charging-blink-full-solid", psy->desc->name);
+ if (!psy->charging_blink_full_solid_trig_name)
+ goto charging_blink_full_solid_failed;
+
+ led_trigger_register_simple(psy->charging_full_trig_name,
+ &psy->charging_full_trig);
+ led_trigger_register_simple(psy->charging_trig_name,
+ &psy->charging_trig);
+ led_trigger_register_simple(psy->full_trig_name,
+ &psy->full_trig);
+ led_trigger_register_simple(psy->charging_blink_full_solid_trig_name,
+ &psy->charging_blink_full_solid_trig);
+
+ return 0;
+
+charging_blink_full_solid_failed:
+ kfree(psy->full_trig_name);
+full_failed:
+ kfree(psy->charging_trig_name);
+charging_failed:
+ kfree(psy->charging_full_trig_name);
+charging_full_failed:
+ return -ENOMEM;
+}
+
+static void power_supply_remove_bat_triggers(struct power_supply *psy)
+{
+ led_trigger_unregister_simple(psy->charging_full_trig);
+ led_trigger_unregister_simple(psy->charging_trig);
+ led_trigger_unregister_simple(psy->full_trig);
+ led_trigger_unregister_simple(psy->charging_blink_full_solid_trig);
+ kfree(psy->charging_blink_full_solid_trig_name);
+ kfree(psy->full_trig_name);
+ kfree(psy->charging_trig_name);
+ kfree(psy->charging_full_trig_name);
+}
+
+/* Generated power specific LEDs triggers. */
+
+static void power_supply_update_gen_leds(struct power_supply *psy)
+{
+ union power_supply_propval online;
+
+ if (psy->desc->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online))
+ return;
+
+ dev_dbg(&psy->dev, "%s %d\n", __func__, online.intval);
+
+ if (online.intval)
+ led_trigger_event(psy->online_trig, LED_FULL);
+ else
+ led_trigger_event(psy->online_trig, LED_OFF);
+}
+
+static int power_supply_create_gen_triggers(struct power_supply *psy)
+{
+ psy->online_trig_name = kasprintf(GFP_KERNEL, "%s-online",
+ psy->desc->name);
+ if (!psy->online_trig_name)
+ return -ENOMEM;
+
+ led_trigger_register_simple(psy->online_trig_name, &psy->online_trig);
+
+ return 0;
+}
+
+static void power_supply_remove_gen_triggers(struct power_supply *psy)
+{
+ led_trigger_unregister_simple(psy->online_trig);
+ kfree(psy->online_trig_name);
+}
+
+/* Choice what triggers to create&update. */
+
+void power_supply_update_leds(struct power_supply *psy)
+{
+ if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
+ power_supply_update_bat_leds(psy);
+ else
+ power_supply_update_gen_leds(psy);
+}
+
+int power_supply_create_triggers(struct power_supply *psy)
+{
+ if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
+ return power_supply_create_bat_triggers(psy);
+ return power_supply_create_gen_triggers(psy);
+}
+
+void power_supply_remove_triggers(struct power_supply *psy)
+{
+ if (psy->desc->type == POWER_SUPPLY_TYPE_BATTERY)
+ power_supply_remove_bat_triggers(psy);
+ else
+ power_supply_remove_gen_triggers(psy);
+}