diff options
Diffstat (limited to 'drivers/hid/hid-input.c')
| -rw-r--r-- | drivers/hid/hid-input.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 27d8442b017d..199f6a01fc62 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -520,15 +520,21 @@ static void hidinput_cleanup_battery(struct hid_device *dev) static void hidinput_update_battery(struct hid_device *dev, int value) { + int capacity; + if (!dev->battery) return; if (value == 0 || value < dev->battery_min || value > dev->battery_max) return; - dev->battery_capacity = hidinput_scale_battery_capacity(dev, value); - dev->battery_reported = true; - power_supply_changed(dev->battery); + capacity = hidinput_scale_battery_capacity(dev, value); + + if (!dev->battery_reported || capacity != dev->battery_capacity) { + dev->battery_capacity = capacity; + dev->battery_reported = true; + power_supply_changed(dev->battery); + } } #else /* !CONFIG_HID_BATTERY_STRENGTH */ static int hidinput_setup_battery(struct hid_device *dev, unsigned report_type, |