This patch implements POSIX-compliant CLOCKFD support, enabling user
applications to access dynamic PTP clocks through file descriptors
combined with clock_gettime() and clock_settime() system calls.
Key changes include:
1. CLOCKFD macro support:
- Added CLOCKFD() macro in include/nuttx/clock.h
- Allows encoding file descriptor into clockid_t: CLOCKFD(fd)
- Enables accessing PTP clocks via: clock_gettime(CLOCKFD(fd), &ts)
2. clock_gettime() enhancements:
- Modified sched/clock/clock_gettime.c to detect CLOCKFD clockids
- Extracts file descriptor from clockid using CLOCKFD_TO_FD()
- Validates file descriptor and calls file_ioctl() with PTP_CLOCK_GETTIME
- Falls back to standard clock handling for non-CLOCKFD clockids
3. clock_settime() enhancements:
- Modified sched/clock/clock_settime.c to support CLOCKFD clockids
- Extracts file descriptor and validates accessibility
- Issues PTP_CLOCK_SETTIME ioctl to underlying PTP clock device
- Maintains backward compatibility with standard POSIX clocks
4. File descriptor validation:
- Checks file descriptor validity using fs_getfilep()
- Ensures proper reference counting with fs_putfilep()
- Returns appropriate error codes (EINVAL, EBADF) on failures
5. Integration with PTP clock framework:
- Seamlessly integrates with PTP clock driver's ioctl interface
- Enables standard POSIX clock API usage for dynamic PTP clocks
- No changes required to existing applications using standard clocks
Usage example:
int fd = open("/dev/ptp0", O_RDONLY);
struct timespec ts;
clock_gettime(CLOCKFD(fd), &ts); /* Get PTP clock time */
clock_settime(CLOCKFD(fd), &ts); /* Set PTP clock time */
close(fd);
This implementation follows the Linux kernel's PTP clock model, providing
a familiar interface for developers working with PTP hardware.
Signed-off-by: dongjiuzhu1 <dongjiuzhu1@xiaomi.com>
Most tools used for compliance and SBOM generation use SPDX identifiers
This change brings us a step closer to an easy SBOM generation.
Signed-off-by: Alin Jerpelea <alin.jerpelea@sony.com>
Previous adjtime() implementation was limited to adjusting system
timer tick period. This commit reimplements the internals to use
a kernel watchdog timer. Platform-independent part of the code now
works also for adjusting hires RTC and tickless timer rate.
User code facing API is unchanged. Architecture code API has changed:
up_adj_timer_period() is replaced by up_adjtime().
Other improvements:
- Support query of remaining adjustment by passing NULL to first
argument of adjtime(). This matches Linux behavior.
- Improve resolution available for architecture driver, previously
limited to 1 microsecond per tick. Now 1 nanosecond per second.
This commit adds Linux like adjtime() interface that is used to correct
the system time clock if it varies from real value. The adjustment is
done by slight adjustment of clock period and therefore the adjustment
is without time jumps (both forward and backwards)
The implementation is enabled by CONFIG_CLOCK_ADJTIME and separated from
CONFIG_CLOCK_TIMEKEEPING functions. Options CONFIG_CLOCK_ADJTIME_SLEWLIMIT
and CONFIG_CLOCK_ADJTIME_PERIOD can be used to control the adjustment
speed.
Interfaces up_get_timer_period() and up_adj_timer_period() has to be
defined by architecture level support.
This is not a POSIX interface but derives from 4.3BSD, System V.
It is also supported for Linux compatibility.
Signed-off-by: Michal Lenc <michallenc@seznam.cz>
MIRTOS-109
Return error when tv_nsec <0 or >=1000 million.
Change-Id: Iddbbcda163cb402551f619efb7486f6798859d57
Signed-off-by: Peter Bee <bijunda1@xiaomi.com>
* Simplify EINTR/ECANCEL error handling
1. Add semaphore uninterruptible wait function
2 .Replace semaphore wait loop with a single uninterruptible wait
3. Replace all sem_xxx to nxsem_xxx
* Unify the void cast usage
1. Remove void cast for function because many place ignore the returned value witout cast
2. Replace void cast for variable with UNUSED macro
