diff --git a/sys/arm/versatile/sp804.c b/sys/arm/versatile/sp804.c index 395d70ac9b32..16db30dec890 100644 --- a/sys/arm/versatile/sp804.c +++ b/sys/arm/versatile/sp804.c @@ -100,6 +100,7 @@ struct sp804_timer_softc { struct timecounter tc; bool et_enabled; struct eventtimer et; + int timer_initialized; }; /* Read/Write macros for Timer used as timecounter */ @@ -198,6 +199,8 @@ sp804_timer_attach(device_t dev) int rid = 0; int i; uint32_t id, reg; + phandle_t node; + pcell_t clock; sc->mem_res = bus_alloc_resource_any(dev, SYS_RES_MEMORY, &rid, RF_ACTIVE); if (sc->mem_res == NULL) { @@ -215,8 +218,12 @@ sp804_timer_attach(device_t dev) return (ENXIO); } - /* TODO: get frequency from FDT */ sc->sysclk_freq = DEFAULT_FREQUENCY; + /* Get the base clock frequency */ + node = ofw_bus_get_node(dev); + if ((OF_getprop(node, "clock-frequency", &clock, sizeof(clock))) > 0) { + sc->sysclk_freq = fdt32_to_cpu(clock); + } /* Setup and enable the timer */ if (bus_setup_intr(dev, sc->irq_res, INTR_TYPE_CLK, @@ -234,8 +241,8 @@ sp804_timer_attach(device_t dev) /* * Timer 1, timecounter */ - sc->tc.tc_frequency = DEFAULT_FREQUENCY; - sc->tc.tc_name = "SP804 Timecouter"; + sc->tc.tc_frequency = sc->sysclk_freq; + sc->tc.tc_name = "SP804 Time Counter"; sc->tc.tc_get_timecount = sp804_timer_tc_get_timecount; sc->tc.tc_poll_pps = NULL; sc->tc.tc_counter_mask = ~0u; @@ -283,6 +290,8 @@ sp804_timer_attach(device_t dev) device_printf(dev, "PrimeCell ID: %08x\n", id); + sc->timer_initialized = 1; + return (0); } @@ -309,10 +318,18 @@ DELAY(int usec) uint32_t first, last; device_t timer_dev; struct sp804_timer_softc *sc; + int timer_initialized = 0; timer_dev = devclass_get_device(sp804_timer_devclass, 0); - if (timer_dev == NULL) { + if (timer_dev) { + sc = device_get_softc(timer_dev); + + if (sc) + timer_initialized = sc->timer_initialized; + } + + if (!timer_initialized) { /* * Timer is not initialized yet */ @@ -323,8 +340,6 @@ DELAY(int usec) return; } - sc = device_get_softc(timer_dev); - /* Get the number of times to count */ counts = usec * ((sc->tc.tc_frequency / 1000000) + 1);