From c6838eeef2fbc7e3e1f83759aa016ae6b70c643e Mon Sep 17 00:00:00 2001 From: "dmitry.torokhov@gmail.com" Date: Wed, 30 Sep 2020 15:47:13 -0700 Subject: HID: hid-input: occasionally report stylus battery even if not changed There are styluses that only report their battery status when they are touching the touchscreen; additionally we currently suppress battery reports if capacity has not changed. To help userspace recognize how long ago the device reported battery status, let's send the change event through if either capacity has changed, or at least 30 seconds have passed since last report we've let through. Signed-off-by: Dmitry Torokhov Signed-off-by: Jiri Kosina --- drivers/hid/hid-input.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'drivers/hid') diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 9770db624bfa..b0db2a2ac15a 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -534,9 +534,12 @@ static void hidinput_update_battery(struct hid_device *dev, int value) capacity = hidinput_scale_battery_capacity(dev, value); if (dev->battery_status != HID_BATTERY_REPORTED || - capacity != dev->battery_capacity) { + capacity != dev->battery_capacity || + ktime_after(ktime_get_coarse(), dev->battery_ratelimit_time)) { dev->battery_capacity = capacity; dev->battery_status = HID_BATTERY_REPORTED; + dev->battery_ratelimit_time = + ktime_add_ms(ktime_get_coarse(), 30 * 1000); power_supply_changed(dev->battery); } } -- cgit v1.2.3