1.Allow multi users to access the same sensor device simultaneously.
2.Get real state of sensor device by cmd SNIOC_GET_STATE for users.
3.Get update state since last read by poll without timeout for users.
4.Sensor device will be activated when first user open and will close when
last user closed.
5.When multi users to access device, driver always set the minimum
sampling interval and latency to the sensor device and allow
downsampled for users above the minimum sampling interval.
6.The circbuffer will overwrite old data when buffer is full, so if users
don't read data soon, data will be lost, and the oldest data in circbuffer
are returned to the users.
7.Always read the last data in the circbuffer as initial value for new
users when the sensor device has not yet generated new data.
8.when user uses poll, if subscription interval is satisfied, the POLLIN
events is returned for each users.
9.When new user generate or the state of sensor device changed, the POLLPRI
will notify to all users.
10.Support multi advertisers to subscribe their own data as loop test.
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
1.cmd:SNIOC_REGISTER with struct sensor_reginfo_s to register user sensor
2.cmd:SNIOC_UNREGISTER to unregister user sensor
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
1.Simplify buffer opeations to avoid frequent resize for batch and no-batch mode.
2.When sensor event is first generated, the buffer is initialized.
3.Remove and merge batch_number to buffer_number when device support batch mode.
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
Gregory Nutt is the copyright holder for those files and he has submitted the
SGA as a result we can migrate the licenses to Apache.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
complete the following commits:
commit d87cf8d4ca
Author: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
Date: Fri Apr 1 20:59:55 2022 +0800
fs/poll: change format for type pollevent_t
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
commit d535943a69
Author: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
Date: Fri Apr 1 17:49:10 2022 +0800
fs/epoll: change type of eventset from uint8_t to uint32_t
to support EPOLLONESHOT and so on.
Signed-off-by: Jiuzhu Dong <dongjiuzhu1@xiaomi.com>
Signed-off-by: chao.an <anchao@xiaomi.com>
Gregory Nutt has submitted the SGA
Giorgio Gross has submitted the ICLA
as a result we can migrate the licenses to Apache.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
here is the reason:
1.clock_systime_timespec(core function) always exist regardless the setting
2.CLOCK_MONOTONIC is a foundamental clock type required by many places
Signed-off-by: Xiang Xiao <xiaoxiang@xiaomi.com>
State of problem:
- Some drivers that do not support write operations (does not
have write handler or ioctl do not perform any write actions)
are registered with write permissions
- Some drivers that do not support read operation (does not
have read handler or ioctl do not perform any read actions)
are registered with read permissions
- Some drivers are registered with execute permissions
Solution:
- Iterate code where register_driver() is used and change 'mode'
parameter to reflect the actual read/write operations executed
by a driver
- Remove execute permissions from 'mode' parameter
Signed-off-by: Petro Karashchenko <petro.karashchenko@gmail.com>
Some PPG devices have 4 ADCs to output quad-channel PPG values while some of them only have 2 ADCs to output dual-channel PPG.
To deal the case above, the type PPGD(PPG of Dual-channel) takes the place of former type PPG, which also have 2-channel PPG outputs. Type PPGQ (PPG of Quad-channel) is new for 4-ADC-PPG. Both types have contained new data "gain" to indicate ADC gains of each PPG channel, for the reason that the gains may vary during automatical optical adjustments.
Signed-off-by: liucheng5 <liucheng5@xiaomi.com>
