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power: supply: core: fix build of extension sysfs group if CONFIG_SYSFS=n

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Add and use wrapper functions for the sysfs interaction.
Restore the compatibility of CONFIG_POWER_SUPPLY=y and CONFIG_SYSFS=n.

Reported-by: Nathan Chancellor <nathan@kernel.org>
Closes: https://lore.kernel.org/lkml/20241218195229.GA2796534@ax162/
Fixes: 288a2cabcf ("power: supply: core: add UAPI to discover currently used extensions")
Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20241219-psy-extensions-sysfs-v1-1-868fc6cb46d6@weissschuh.net
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Thomas Weißschuh 2024-12-19 15:28:18 +01:00 committed by Sebastian Reichel
parent 5972da73f7
commit 21096800c5
3 changed files with 30 additions and 10 deletions
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12
drivers/power/supply/power_supply.h
View File

@ -40,14 +40,24 @@ struct power_supply_ext_registration {
extern void __init power_supply_init_attrs(void);
extern int power_supply_uevent(const struct device *dev, struct kobj_uevent_env *env);
extern const struct attribute_group power_supply_extension_group;
extern const struct attribute_group *power_supply_attr_groups[];
extern int power_supply_sysfs_add_extension(struct power_supply *psy,
const struct power_supply_ext *ext,
struct device *dev);
extern void power_supply_sysfs_remove_extension(struct power_supply *psy,
const struct power_supply_ext *ext);
#else
static inline void power_supply_init_attrs(void) {}
#define power_supply_attr_groups NULL
#define power_supply_uevent NULL
static inline int power_supply_sysfs_add_extension(struct power_supply *psy,
const struct power_supply_ext *ext,
struct device *dev)
{ return 0; }
static inline void power_supply_sysfs_remove_extension(struct power_supply *psy,
const struct power_supply_ext *ext) {}
#endif /* CONFIG_SYSFS */

13
drivers/power/supply/power_supply_core.c
View File

@ -1386,10 +1386,9 @@ int power_supply_register_extension(struct power_supply *psy, const struct power
reg->data = data;
list_add(&reg->list_head, &psy->extensions);
ret = sysfs_add_link_to_group(&psy->dev.kobj, power_supply_extension_group.name,
&dev->kobj, ext->name);
ret = power_supply_sysfs_add_extension(psy, ext, dev);
if (ret)
goto sysfs_link_failed;
goto sysfs_add_failed;
ret = power_supply_update_sysfs_and_hwmon(psy);
if (ret)
@ -1398,8 +1397,8 @@ int power_supply_register_extension(struct power_supply *psy, const struct power
return 0;
sysfs_hwmon_failed:
sysfs_remove_link_from_group(&psy->dev.kobj, power_supply_extension_group.name, ext->name);
sysfs_link_failed:
power_supply_sysfs_remove_extension(psy, ext);
sysfs_add_failed:
list_del(&reg->list_head);
kfree(reg);
return ret;
@ -1415,9 +1414,7 @@ void power_supply_unregister_extension(struct power_supply *psy, const struct po
power_supply_for_each_extension(reg, psy) {
if (reg->ext == ext) {
list_del(&reg->list_head);
sysfs_remove_link_from_group(&psy->dev.kobj,
power_supply_extension_group.name,
reg->ext->name);
power_supply_sysfs_remove_extension(psy, ext);
kfree(reg);
power_supply_update_sysfs_and_hwmon(psy);
return;

15
drivers/power/supply/power_supply_sysfs.c
View File

@ -462,7 +462,7 @@ static struct attribute *power_supply_extension_attrs[] = {
NULL
};
const struct attribute_group power_supply_extension_group = {
static const struct attribute_group power_supply_extension_group = {
.name = "extensions",
.attrs = power_supply_extension_attrs,
};
@ -624,3 +624,16 @@ int power_supply_charge_types_parse(unsigned int available_types, const char *bu
return -EINVAL;
}
EXPORT_SYMBOL_GPL(power_supply_charge_types_parse);
int power_supply_sysfs_add_extension(struct power_supply *psy, const struct power_supply_ext *ext,
struct device *dev)
{
return sysfs_add_link_to_group(&psy->dev.kobj, power_supply_extension_group.name,
&dev->kobj, ext->name);
}
void power_supply_sysfs_remove_extension(struct power_supply *psy,
const struct power_supply_ext *ext)
{
sysfs_remove_link_from_group(&psy->dev.kobj, power_supply_extension_group.name, ext->name);
}