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author | Anton Vorontsov <cbou@mail.ru> | 2007-05-04 00:27:45 +0400 |
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committer | David Woodhouse <dwmw2@infradead.org> | 2007-07-10 11:25:44 +0100 |
commit | 4a11b59d8283662193a9c6a9c14c58d1b9bf0617 (patch) | |
tree | 492bf022c806ec6c554ca5f8e7c05ea6db138137 /drivers/power/power_supply_leds.c | |
parent | 7dcca30a32aadb0520417521b0c44f42d09fe05c (diff) | |
download | kernel_samsung_smdk4412-4a11b59d8283662193a9c6a9c14c58d1b9bf0617.zip kernel_samsung_smdk4412-4a11b59d8283662193a9c6a9c14c58d1b9bf0617.tar.gz kernel_samsung_smdk4412-4a11b59d8283662193a9c6a9c14c58d1b9bf0617.tar.bz2 |
[BATTERY] Universal power supply class (was: battery class)
This class is result of "external power" and "battery" classes merge,
as suggested by David Woodhouse. He also implemented uevent support.
Here how userspace seeing it now:
# ls /sys/class/power\ supply/
ac main-battery usb
# cat /sys/class/power\ supply/ac/type
AC
# cat /sys/class/power\ supply/usb/type
USB
# cat /sys/class/power\ supply/main-battery/type
Battery
# cat /sys/class/power\ supply/ac/online
1
# cat /sys/class/power\ supply/usb/online
0
# cat /sys/class/power\ supply/main-battery/status
Charging
# cat /sys/class/leds/h5400\:red-left/trigger
none h5400-radio timer hwtimer ac-online usb-online
main-battery-charging-or-full [main-battery-charging]
main-battery-full
Signed-off-by: Anton Vorontsov <cbou@mail.ru>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'drivers/power/power_supply_leds.c')
-rw-r--r-- | drivers/power/power_supply_leds.c | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/drivers/power/power_supply_leds.c b/drivers/power/power_supply_leds.c new file mode 100644 index 0000000..7232490 --- /dev/null +++ b/drivers/power/power_supply_leds.c @@ -0,0 +1,176 @@ +/* + * 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/power_supply.h> + +/* Battery specific LEDs triggers. */ + +static void power_supply_update_bat_leds(struct power_supply *psy) +{ + union power_supply_propval status; + + if (psy->get_property(psy, POWER_SUPPLY_PROP_STATUS, &status)) + return; + + dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, 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); + 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); + 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); + break; + } + + return; +} + +static int power_supply_create_bat_triggers(struct power_supply *psy) +{ + int rc = 0; + + psy->charging_full_trig_name = kmalloc(strlen(psy->name) + + sizeof("-charging-or-full"), GFP_KERNEL); + if (!psy->charging_full_trig_name) + goto charging_full_failed; + + psy->charging_trig_name = kmalloc(strlen(psy->name) + + sizeof("-charging"), GFP_KERNEL); + if (!psy->charging_trig_name) + goto charging_failed; + + psy->full_trig_name = kmalloc(strlen(psy->name) + + sizeof("-full"), GFP_KERNEL); + if (!psy->full_trig_name) + goto full_failed; + + strcpy(psy->charging_full_trig_name, psy->name); + strcat(psy->charging_full_trig_name, "-charging-or-full"); + strcpy(psy->charging_trig_name, psy->name); + strcat(psy->charging_trig_name, "-charging"); + strcpy(psy->full_trig_name, psy->name); + strcat(psy->full_trig_name, "-full"); + + 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); + + goto success; + +full_failed: + kfree(psy->charging_trig_name); +charging_failed: + kfree(psy->charging_full_trig_name); +charging_full_failed: + rc = -ENOMEM; +success: + return rc; +} + +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); + kfree(psy->full_trig_name); + kfree(psy->charging_trig_name); + kfree(psy->charging_full_trig_name); + return; +} + +/* Generated power specific LEDs triggers. */ + +static void power_supply_update_gen_leds(struct power_supply *psy) +{ + union power_supply_propval online; + + if (psy->get_property(psy, POWER_SUPPLY_PROP_ONLINE, &online)) + return; + + dev_dbg(psy->dev, "%s %d\n", __FUNCTION__, online.intval); + + if (online.intval) + led_trigger_event(psy->online_trig, LED_FULL); + else + led_trigger_event(psy->online_trig, LED_OFF); + + return; +} + +static int power_supply_create_gen_triggers(struct power_supply *psy) +{ + int rc = 0; + + psy->online_trig_name = kmalloc(strlen(psy->name) + sizeof("-online"), + GFP_KERNEL); + if (!psy->online_trig_name) + goto online_failed; + + strcpy(psy->online_trig_name, psy->name); + strcat(psy->online_trig_name, "-online"); + + led_trigger_register_simple(psy->online_trig_name, &psy->online_trig); + + goto success; + +online_failed: + rc = -ENOMEM; +success: + return rc; +} + +static void power_supply_remove_gen_triggers(struct power_supply *psy) +{ + led_trigger_unregister_simple(psy->online_trig); + kfree(psy->online_trig_name); + return; +} + +/* Choice what triggers to create&update. */ + +void power_supply_update_leds(struct power_supply *psy) +{ + if (psy->type == POWER_SUPPLY_TYPE_BATTERY) + power_supply_update_bat_leds(psy); + else + power_supply_update_gen_leds(psy); + return; +} + +int power_supply_create_triggers(struct power_supply *psy) +{ + if (psy->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->type == POWER_SUPPLY_TYPE_BATTERY) + power_supply_remove_bat_triggers(psy); + else + power_supply_remove_gen_triggers(psy); + return; +} |