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| author | Jeremy Fitzhardinge <jeremy@goop.org> | 2011-12-07 17:15:45 (GMT) |
|---|---|---|
| committer | Jeremy Fitzhardinge <jeremy@goop.org> | 2011-12-09 17:52:07 (GMT) |
| commit | 8351665195cec6d2b73cce8b66f02d6dde246a8e (patch) | |
| tree | 3b31b34dc1737ff40679036d97a3f7d6c49ffa88 /drivers/power | |
| parent | 25a0bc2dfc2ea732f40af2dae52426ead66ae76e (diff) | |
| download | linux-8351665195cec6d2b73cce8b66f02d6dde246a8e.tar.xz | |
power_supply: allow a power supply to explicitly point to powered device
If a power supply has a scope of "Device", then allow the power supply
to indicate what device it actually powers. This is represented in the
power supply's sysfs directory as a symlink named "powers", which points to
the sysfs directory of the powered device.
If the device has children, then the sub-devices are also powered by
the same power supply.
Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Richard Hughes <richard@hughsie.com>
Diffstat (limited to 'drivers/power')
| -rw-r--r-- | drivers/power/power_supply_core.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/drivers/power/power_supply_core.c b/drivers/power/power_supply_core.c index 329b46b..b10c121 100644 --- a/drivers/power/power_supply_core.c +++ b/drivers/power/power_supply_core.c @@ -147,6 +147,12 @@ struct power_supply *power_supply_get_by_name(char *name) } EXPORT_SYMBOL_GPL(power_supply_get_by_name); +int power_supply_powers(struct power_supply *psy, struct device *dev) +{ + return sysfs_create_link_nowarn(&psy->dev->kobj, &dev->kobj, "powers"); +} +EXPORT_SYMBOL_GPL(power_supply_powers); + static void power_supply_dev_release(struct device *dev) { pr_debug("device: '%s': %s\n", dev_name(dev), __func__); @@ -202,6 +208,7 @@ EXPORT_SYMBOL_GPL(power_supply_register); void power_supply_unregister(struct power_supply *psy) { cancel_work_sync(&psy->changed_work); + sysfs_remove_link(&psy->dev->kobj, "powers"); power_supply_remove_triggers(psy); device_unregister(psy->dev); } |