power: supply: core: add support for custom sysfs attributes

Add functionality to setup device specific sysfs attributes
in a race condition free manner

Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>

2 files changed, 4 insertions, 0 deletions

diff --git a/drivers/power/supply/power_supply_core.c b/drivers/power/supply/power_supply_core.c
index 93007cb202f0..569790ea6917 100644
--- a/drivers/power/supply/power_supply_core.c
+++ b/drivers/power/supply/power_supply_core.c
@@ -1018,6 +1018,7 @@ __power_supply_register(struct device *parent,
         dev_set_drvdata(dev, psy);
         psy->desc = desc;
         if (cfg) {
+                dev->groups = cfg->attr_grp;
                 psy->drv_data = cfg->drv_data;
                 psy->of_node =
                         cfg->fwnode ? to_of_node(cfg->fwnode) : cfg->of_node;
diff --git a/include/linux/power_supply.h b/include/linux/power_supply.h
index 84fe93f674a0..57b2ab82b951 100644
--- a/include/linux/power_supply.h
+++ b/include/linux/power_supply.h
@@ -204,6 +204,9 @@ struct power_supply_config {
         /* Driver private data */
         void *drv_data;
 
+        /* Device specific sysfs attributes */
+        const struct attribute_group **attr_grp;
+
         char **supplied_to;
         size_t num_supplicants;
 };