4  * SPDX-License-Identifier: Apache-2.0
10  * TI SimpleLink CC13X2/CC26X2 RTC-based system timer
13  * RTC counts continually in 64-bit mode and timeouts are
80 	if ((next - now) > (uint32_t)0x80000000) {  in setThreshold()
83 	} else if ((now + COMPARE_MARGIN - next) < (uint32_t)0x80000000) {  in setThreshold()
111 	ticks = (currCount - rtc_last) / RTC_COUNTS_PER_TICK;  in rtc_isr()
120 	/* calculate new 64-bit RTC count for next interrupt */  in rtc_isr()
153 	uint64_t period;  in startDevice()  local
164 	 * set the compare register to one period.  in startDevice()
165 	 * For a very small period round up to interrupt upon 4th tick in  in startDevice()
168 	period = RTC_COUNTS_PER_TICK;  in startDevice()
169 	if (period < 0x40000) {  in startDevice()
172 		/* else, interrupt on first period expiration */  in startDevice()
173 		compare = period >> 16;  in startDevice()
197 	ticks = CLAMP(ticks - 1, 0, (int32_t) MAX_TICKS);  in sys_clock_set_timeout()
201 	/* Compute number of RTC cycles until the next timeout. */  in sys_clock_set_timeout()
203 	uint64_t timeout = ticks * RTC_COUNTS_PER_TICK +  in sys_clock_set_timeout()  local
204 		(count - rtc_last);  in sys_clock_set_timeout()
207 	timeout = DIV_ROUND_UP(timeout, RTC_COUNTS_PER_TICK) *  in sys_clock_set_timeout()
209 	timeout = MIN(timeout, MAX_CYC);  in sys_clock_set_timeout()
210 	timeout += rtc_last;  in sys_clock_set_timeout()
213 	setThreshold(timeout >> 16);  in sys_clock_set_timeout()
221 	uint32_t ret = (AONRTCCurrent64BitValueGet() - rtc_last) /  in sys_clock_elapsed()