power: supply: ds2781: use kobj_to_dev()

Use kobj_to_dev() instead of open-coding it

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

diff --git a/drivers/power/supply/ds2781_battery.c b/drivers/power/supply/ds2781_battery.c
index 3df3c82..05b859b 100644 (file)
--- a/drivers/power/supply/ds2781_battery.c
+++ b/drivers/power/supply/ds2781_battery.c
@@ -626,7 +626,7 @@ static ssize_t ds2781_read_param_eeprom_bin(struct file *filp,
                                struct bin_attribute *bin_attr,
                                char *buf, loff_t off, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct power_supply *psy = to_power_supply(dev);
        struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
 
@@ -639,7 +639,7 @@ static ssize_t ds2781_write_param_eeprom_bin(struct file *filp,
                                struct bin_attribute *bin_attr,
                                char *buf, loff_t off, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct power_supply *psy = to_power_supply(dev);
        struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
        int ret;
@@ -671,7 +671,7 @@ static ssize_t ds2781_read_user_eeprom_bin(struct file *filp,
                                struct bin_attribute *bin_attr,
                                char *buf, loff_t off, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct power_supply *psy = to_power_supply(dev);
        struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
 
@@ -685,7 +685,7 @@ static ssize_t ds2781_write_user_eeprom_bin(struct file *filp,
                                struct bin_attribute *bin_attr,
                                char *buf, loff_t off, size_t count)
 {
-       struct device *dev = container_of(kobj, struct device, kobj);
+       struct device *dev = kobj_to_dev(kobj);
        struct power_supply *psy = to_power_supply(dev);
        struct ds2781_device_info *dev_info = to_ds2781_device_info(psy);
        int ret;