Index: sys/arm64/rockchip/rk805.c
===================================================================
--- sys/arm64/rockchip/rk805.c
+++ sys/arm64/rockchip/rk805.c
@@ -35,6 +35,7 @@
 #include <sys/module.h>
 #include <sys/mutex.h>
 #include <sys/rman.h>
+#include <sys/sysctl.h>
 #include <machine/bus.h>
 
 #include <dev/iicbus/iiconf.h>
@@ -53,6 +54,10 @@
 
 MALLOC_DEFINE(M_RK805_REG, "RK805 regulator", "RK805 power regulator");
 
+static bool rtc_logging;
+SYSCTL_BOOL(_debug, OID_AUTO, rk805_rtc_logging, CTLFLAG_RWTUN, &rtc_logging, 0,
+    "Enable RK805 RTC read/set logging");
+
 /* #define	dprintf(sc, format, arg...)	device_printf(sc->base_dev, "%s: " format, __func__, arg) */
 #define	dprintf(sc, format, arg...)
 
@@ -798,7 +803,7 @@
 		bct.dow = 0;
 	bct.ispm = 0;
 
-	if (bootverbose)
+	if (rtc_logging)
 		device_printf(dev, "Read RTC: %02x-%02x-%02x %02x:%02x:%02x\n",
 		    bct.year, bct.mon, bct.day, bct.hour, bct.min, bct.sec);
 
@@ -841,7 +846,7 @@
 	ctrl &= ~RK805_RTC_CTRL_STOP;
 	rk805_write(dev, RK805_RTC_CTRL, &ctrl, 1);
 
-	if (bootverbose)
+	if (rtc_logging)
 		device_printf(dev,
 		    "Set RTC at %04x-%02x-%02x %02x:%02x:%02x[.%09ld]\n",
 		    bct.year, bct.mon, bct.day, bct.hour, bct.min, bct.sec,