selftests: timers: move PIE tests out of rtctest

Since commit 6610e0893b8bc ("RTC: Rework RTC code to use timerqueue for
events"), PIE are completely handled using hrtimers, without actually using
any underlying hardware RTC.

Move PIE testing out of rtctest. It still depends on the presence of an RTC
(to access the device file) but doesn't depend on it actually working.

Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Shuah Khan (Samsung OSG) <shuah@kernel.org>

1 files changed, 4 insertions, 79 deletions

diff --git a/tools/testing/selftests/timers/rtctest.c b/tools/testing/selftests/timers/rtctest.c
index 411eff625e66..6e17b96551ec 100644
--- a/tools/testing/selftests/timers/rtctest.c
+++ b/tools/testing/selftests/timers/rtctest.c
@@ -94,10 +94,9 @@ static int compare_dates(struct rtc_time *a, struct rtc_time *b)
 int main(int argc, char **argv)
 {
 	int i, fd, retval, irqcount = 0, dangerous = 0;
-	unsigned long tmp, data;
+	unsigned long data;
 	struct rtc_time rtc_tm;
 	const char *rtc = default_rtc;
-	struct timeval start, end, diff;
 
 	switch (argc) {
 	case 3:
@@ -211,7 +210,7 @@ test_READ:
 		if (errno == EINVAL) {
 			fprintf(stderr,
 				"\n...Alarm IRQs not supported.\n");
-			goto test_PIE;
+			goto test_DATE;
 		}
 
 		perror("RTC_ALM_SET ioctl");
@@ -224,7 +223,7 @@ test_READ:
 		if (errno == EINVAL) {
 			fprintf(stderr,
 					"\n...EINVAL reading current alarm setting.\n");
-			goto test_PIE;
+			goto test_DATE;
 		}
 		perror("RTC_ALM_READ ioctl");
 		exit(errno);
@@ -239,7 +238,7 @@ test_READ:
 		if (errno == EINVAL || errno == EIO) {
 			fprintf(stderr,
 				"\n...Alarm IRQs not supported.\n");
-			goto test_PIE;
+			goto test_DATE;
 		}
 
 		perror("RTC_AIE_ON ioctl");
@@ -264,80 +263,6 @@ test_READ:
 		exit(errno);
 	}
 
-test_PIE:
-	/* Read periodic IRQ rate */
-	retval = ioctl(fd, RTC_IRQP_READ, &tmp);
-	if (retval == -1) {
-		/* not all RTCs support periodic IRQs */
-		if (errno == EINVAL) {
-			fprintf(stderr, "\nNo periodic IRQ support\n");
-			goto test_DATE;
-		}
-		perror("RTC_IRQP_READ ioctl");
-		exit(errno);
-	}
-	fprintf(stderr, "\nPeriodic IRQ rate is %ldHz.\n", tmp);
-
-	fprintf(stderr, "Counting 20 interrupts at:");
-	fflush(stderr);
-
-	/* The frequencies 128Hz, 256Hz, ... 8192Hz are only allowed for root. */
-	for (tmp=2; tmp<=64; tmp*=2) {
-
-		retval = ioctl(fd, RTC_IRQP_SET, tmp);
-		if (retval == -1) {
-			/* not all RTCs can change their periodic IRQ rate */
-			if (errno == EINVAL) {
-				fprintf(stderr,
-					"\n...Periodic IRQ rate is fixed\n");
-				goto test_DATE;
-			}
-			perror("RTC_IRQP_SET ioctl");
-			exit(errno);
-		}
-
-		fprintf(stderr, "\n%ldHz:\t", tmp);
-		fflush(stderr);
-
-		/* Enable periodic interrupts */
-		retval = ioctl(fd, RTC_PIE_ON, 0);
-		if (retval == -1) {
-			perror("RTC_PIE_ON ioctl");
-			exit(errno);
-		}
-
-		for (i=1; i<21; i++) {
-			gettimeofday(&start, NULL);
-			/* This blocks */
-			retval = read(fd, &data, sizeof(unsigned long));
-			if (retval == -1) {
-				perror("read");
-				exit(errno);
-			}
-			gettimeofday(&end, NULL);
-			timersub(&end, &start, &diff);
-			if (diff.tv_sec > 0 ||
-			    diff.tv_usec > ((1000000L / tmp) * 1.10)) {
-				fprintf(stderr, "\nPIE delta error: %ld.%06ld should be close to 0.%06ld\n",
-				       diff.tv_sec, diff.tv_usec,
-				       (1000000L / tmp));
-				fflush(stdout);
-				exit(-1);
-			}
-
-			fprintf(stderr, " %d",i);
-			fflush(stderr);
-			irqcount++;
-		}
-
-		/* Disable periodic interrupts */
-		retval = ioctl(fd, RTC_PIE_OFF, 0);
-		if (retval == -1) {
-			perror("RTC_PIE_OFF ioctl");
-			exit(errno);
-		}
-	}
-
 test_DATE:
 	if (!dangerous)
 		goto done;