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d70256a5c7
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>
100 lines
3.2 KiB
C
100 lines
3.2 KiB
C
/*
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* Common defines/structures/etc... for applets that need to work with the RTC.
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*
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* Licensed under GPLv2 or later, see file LICENSE in this source tree.
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*/
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#ifndef BB_RTC_H
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#define BB_RTC_H 1
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#include "libbb.h"
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PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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#if ENABLE_FEATURE_HWCLOCK_ADJTIME_FHS
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# define ADJTIME_PATH "/var/lib/hwclock/adjtime"
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#else
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# define ADJTIME_PATH "/etc/adjtime"
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#endif
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int rtc_adjtime_is_utc(void) FAST_FUNC;
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int rtc_xopen(const char **default_rtc, int flags) FAST_FUNC;
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void rtc_read_tm(struct tm *ptm, int fd) FAST_FUNC;
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time_t rtc_tm2time(struct tm *ptm, int utc) FAST_FUNC;
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/*
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* Everything below this point has been copied from linux/rtc.h
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* to eliminate the kernel header dependency
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*/
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struct linux_rtc_time {
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int tm_sec;
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int tm_min;
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int tm_hour;
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int tm_mday;
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int tm_mon;
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int tm_year;
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int tm_wday;
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int tm_yday;
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int tm_isdst;
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};
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struct linux_rtc_wkalrm {
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unsigned char enabled; /* 0 = alarm disabled, 1 = alarm enabled */
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unsigned char pending; /* 0 = alarm not pending, 1 = alarm pending */
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struct linux_rtc_time time; /* time the alarm is set to */
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};
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struct rtc_param {
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uint64_t param;
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union {
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uint64_t uvalue;
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int64_t svalue;
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uint64_t ptr;
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};
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uint32_t index;
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uint32_t __pad;
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};
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/*
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* ioctl calls that are permitted to the /dev/rtc interface, if
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* any of the RTC drivers are enabled.
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*/
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#define RTC_AIE_ON _IO('p', 0x01) /* Alarm int. enable on */
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#define RTC_AIE_OFF _IO('p', 0x02) /* ... off */
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#define RTC_UIE_ON _IO('p', 0x03) /* Update int. enable on */
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#define RTC_UIE_OFF _IO('p', 0x04) /* ... off */
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#define RTC_PIE_ON _IO('p', 0x05) /* Periodic int. enable on */
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#define RTC_PIE_OFF _IO('p', 0x06) /* ... off */
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#define RTC_WIE_ON _IO('p', 0x0f) /* Watchdog int. enable on */
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#define RTC_WIE_OFF _IO('p', 0x10) /* ... off */
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#define RTC_ALM_SET _IOW('p', 0x07, struct linux_rtc_time) /* Set alarm time */
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#define RTC_ALM_READ _IOR('p', 0x08, struct linux_rtc_time) /* Read alarm time */
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#define RTC_RD_TIME _IOR('p', 0x09, struct linux_rtc_time) /* Read RTC time */
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#define RTC_SET_TIME _IOW('p', 0x0a, struct linux_rtc_time) /* Set RTC time */
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#define RTC_IRQP_READ _IOR('p', 0x0b, unsigned long) /* Read IRQ rate */
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#define RTC_IRQP_SET _IOW('p', 0x0c, unsigned long) /* Set IRQ rate */
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#define RTC_EPOCH_READ _IOR('p', 0x0d, unsigned long) /* Read epoch */
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#define RTC_EPOCH_SET _IOW('p', 0x0e, unsigned long) /* Set epoch */
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#define RTC_WKALM_SET _IOW('p', 0x0f, struct linux_rtc_wkalrm)/* Set wakeup alarm*/
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#define RTC_WKALM_RD _IOR('p', 0x10, struct linux_rtc_wkalrm)/* Get wakeup alarm*/
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#define RTC_PARAM_GET _IOW('p', 0x13, struct rtc_param) /* Get parameter */
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#define RTC_PARAM_SET _IOW('p', 0x14, struct rtc_param) /* Set parameter */
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/* interrupt flags */
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#define RTC_IRQF 0x80 /* any of the following is active */
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#define RTC_PF 0x40
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#define RTC_AF 0x20
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#define RTC_UF 0x10
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#define RTC_PARAM_FEATURES 0
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#define RTC_PARAM_CORRECTION 1
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#define RTC_PARAM_BACKUP_SWITCH_MODE 2
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POP_SAVED_FUNCTION_VISIBILITY
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#endif
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