From: "dmitry.torokhov@gmail.com" dmitry.torokhov@gmail.com
[ Upstream commit c6838eeef2fbc7e3e1f83759aa016ae6b70c643e ]
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 dmitry.torokhov@gmail.com Signed-off-by: Jiri Kosina jkosina@suse.cz Signed-off-by: Sasha Levin sashal@kernel.org --- drivers/hid/hid-input.c | 5 ++++- include/linux/hid.h | 1 + 2 files changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c index 4dca113924593..f797659cb9d91 100644 --- a/drivers/hid/hid-input.c +++ b/drivers/hid/hid-input.c @@ -537,9 +537,12 @@ 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); } } diff --git a/include/linux/hid.h b/include/linux/hid.h index 58684657960bf..b079146850e6e 100644 --- a/include/linux/hid.h +++ b/include/linux/hid.h @@ -585,6 +585,7 @@ struct hid_device { /* device report descriptor */ __s32 battery_report_id; enum hid_battery_status battery_status; bool battery_avoid_query; + ktime_t battery_ratelimit_time; #endif
unsigned long status; /* see STAT flags above */