diff options
| author | Andrej Picej <andrej.picej@norik.com> | 2023-07-11 11:42:49 +0300 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2023-07-12 17:27:49 +0300 |
| commit | d70256a5c719439cc6fab6a4571c1bb46178e4c7 (patch) | |
| tree | 6c7598e59501250805a3cc9b04ce21ba7026a128 /include | |
| parent | 9fc5933b100694174071c7c4697c70095799bfd0 (diff) | |
hwclock: add get/set parameters option
In kernel 5.16 special ioctls were introduced to get/set RTC parameters.
Add option to get/set parameters into busybox version of hwclock.
Implementation is similar to the one already used in linux-utils hwclock
tool.
Example of parameter get use:
$ hwclock -g 2
The RTC parameter 0x2 is set to 0x2.
$ hwclock --param-get bsm
The RTC parameter 0x2 is set to 0x2.
Example of parameter set use:
$ hwclock -p 2=1
The RTC parameter 0x2 will be set to 0x1.
$ hwclock -p bsm=2
The RTC parameter 0x2 will be set to 0x2.
function old new delta
hwclock_main 298 576 +278
.rodata 105231 105400 +169
packed_usage 34541 34576 +35
static.hwclock_longopts 60 84 +24
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 4/0 up/down: 506/0) Total: 506 bytes
Signed-off-by: Andrej Picej <andrej.picej@norik.com>
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/rtc_.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/include/rtc_.h b/include/rtc_.h index 24ff5363f..782966090 100644 --- a/include/rtc_.h +++ b/include/rtc_.h @@ -46,6 +46,17 @@ struct linux_rtc_wkalrm { struct linux_rtc_time time; /* time the alarm is set to */ }; +struct rtc_param { + uint64_t param; + union { + uint64_t uvalue; + int64_t svalue; + uint64_t ptr; + }; + uint32_t index; + uint32_t __pad; +}; + /* * ioctl calls that are permitted to the /dev/rtc interface, if * any of the RTC drivers are enabled. @@ -71,12 +82,19 @@ struct linux_rtc_wkalrm { #define RTC_WKALM_SET _IOW('p', 0x0f, struct linux_rtc_wkalrm)/* Set wakeup alarm*/ #define RTC_WKALM_RD _IOR('p', 0x10, struct linux_rtc_wkalrm)/* Get wakeup alarm*/ +#define RTC_PARAM_GET _IOW('p', 0x13, struct rtc_param) /* Get parameter */ +#define RTC_PARAM_SET _IOW('p', 0x14, struct rtc_param) /* Set parameter */ + /* interrupt flags */ #define RTC_IRQF 0x80 /* any of the following is active */ #define RTC_PF 0x40 #define RTC_AF 0x20 #define RTC_UF 0x10 +#define RTC_PARAM_FEATURES 0 +#define RTC_PARAM_CORRECTION 1 +#define RTC_PARAM_BACKUP_SWITCH_MODE 2 + POP_SAVED_FUNCTION_VISIBILITY #endif |