diff options
Diffstat (limited to 'sys/isa')
| -rw-r--r-- | sys/isa/atrtc.c | 26 | ||||
| -rw-r--r-- | sys/isa/rtc.h | 2 |
2 files changed, 28 insertions, 0 deletions
diff --git a/sys/isa/atrtc.c b/sys/isa/atrtc.c index 990c1ee..777c720 100644 --- a/sys/isa/atrtc.c +++ b/sys/isa/atrtc.c @@ -49,6 +49,8 @@ __FBSDID("$FreeBSD$"); #define RTC_LOCK mtx_lock_spin(&clock_lock) #define RTC_UNLOCK mtx_unlock_spin(&clock_lock) +int atrtcclock_disable = 0; + static int rtc_reg = -1; static u_char rtc_statusa = RTCSA_DIVIDER | RTCSA_NOPROF; static u_char rtc_statusb = RTCSB_24HR; @@ -133,6 +135,27 @@ atrtc_restore(void) rtcin(RTC_INTR); } +int +atrtc_setup_clock(void) +{ + int diag; + + if (atrtcclock_disable) + return (0); + + diag = rtcin(RTC_DIAG); + if (diag != 0) { + printf("RTC BIOS diagnostic error %b\n", + diag, RTCDG_BITS); + return (0); + } + + stathz = RTC_NOPROFRATE; + profhz = RTC_PROFRATE; + + return (1); +} + /********************************************************************** * RTC driver for subr_rtc */ @@ -173,6 +196,7 @@ static int atrtc_attach(device_t dev) { struct atrtc_softc *sc; + int i; /* * Not that we need them or anything, but grab our resources @@ -187,6 +211,8 @@ atrtc_attach(device_t dev) &sc->intr_rid, 8, 8, 1, RF_ACTIVE))) device_printf(dev,"Warning: Couldn't map Interrupt.\n"); clock_register(dev, 1000000); + if (resource_int_value("atrtc", 0, "clock", &i) == 0 && i == 0) + atrtcclock_disable = 1; return(0); } diff --git a/sys/isa/rtc.h b/sys/isa/rtc.h index c802b0b..018a4ed 100644 --- a/sys/isa/rtc.h +++ b/sys/isa/rtc.h @@ -113,6 +113,8 @@ #ifdef _KERNEL extern struct mtx clock_lock; +extern int atrtcclock_disable; +int atrtc_setup_clock(void); int rtcin(int reg); void atrtc_start(void); void atrtc_rate(unsigned rate); |
