diff options
| author | Filip Bozuta <Filip.Bozuta@rt-rk.com> | 2020-01-15 20:36:38 +0100 |
|---|---|---|
| committer | Laurent Vivier <laurent@vivier.eu> | 2020-01-22 15:20:11 +0100 |
| commit | abc81bf678941abfb1c003e71cc833bd8b46c7c6 (patch) | |
| tree | 247b3042843d42147e8c803539b40385bd6c852d /linux-user/ioctls.h | |
| parent | fa857eb570bb7ee05a171c59f9b2864dab2357c9 (diff) | |
linux-user: Add support for getting/setting RTC wakeup alarm using ioctls
This patch implements functionalities of following ioctls:
RTC_WKALM_SET, RTC_WKALM_GET - Getting/Setting wakeup alarm
Some RTCs support a more powerful alarm interface, using these
ioctls to read or write the RTC's alarm time (respectively)
with this structure:
struct rtc_wkalrm {
unsigned char enabled;
unsigned char pending;
struct rtc_time time;
};
The enabled flag is used to enable or disable the alarm
interrupt, or to read its current status; when using these
calls, RTC_AIE_ON and RTC_AIE_OFF are not used. The pending
flag is used by RTC_WKALM_RD to report a pending interrupt
(so it's mostly useless on Linux, except when talking to the
RTC managed by EFI firmware). The time field is as used with
RTC_ALM_READ and RTC_ALM_SET except that the tm_mday, tm_mon,
and tm_year fields are also valid. A pointer to this structure
should be passed as the third ioctl's argument.
Implementation notes:
All ioctls in this patch have a pointer to a structure
rtc_wkalrm as their third argument. That is the reason why
corresponding definition is added in linux-user/syscall_types.h.
Since all elements of this structure are either of type
'unsigned char' or 'struct rtc_time' (that was covered in one
of previous patches), the rest of the implementation is
straightforward.
Reviewed-by: Laurent Vivier <laurent@vivier.eu>
Signed-off-by: Filip Bozuta <Filip.Bozuta@rt-rk.com>
Message-Id: <1579117007-7565-5-git-send-email-Filip.Bozuta@rt-rk.com>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Diffstat (limited to 'linux-user/ioctls.h')
| -rw-r--r-- | linux-user/ioctls.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/linux-user/ioctls.h b/linux-user/ioctls.h index 9e91eaae77..e4c1fbf52b 100644 --- a/linux-user/ioctls.h +++ b/linux-user/ioctls.h @@ -85,6 +85,8 @@ IOCTL(RTC_IRQP_SET, IOC_W, TYPE_ULONG) IOCTL(RTC_EPOCH_READ, IOC_R, MK_PTR(TYPE_ULONG)) IOCTL(RTC_EPOCH_SET, IOC_W, TYPE_ULONG) + IOCTL(RTC_WKALM_RD, IOC_R, MK_PTR(MK_STRUCT(STRUCT_rtc_wkalrm))) + IOCTL(RTC_WKALM_SET, IOC_W, MK_PTR(MK_STRUCT(STRUCT_rtc_wkalrm))) IOCTL(BLKROSET, IOC_W, MK_PTR(TYPE_INT)) IOCTL(BLKROGET, IOC_R, MK_PTR(TYPE_INT)) |