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-rw-r--r--hw/arm/nrf51_soc.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/hw/arm/nrf51_soc.c b/hw/arm/nrf51_soc.c
index 9407c2f..e3e849a 100644
--- a/hw/arm/nrf51_soc.c
+++ b/hw/arm/nrf51_soc.c
@@ -12,6 +12,7 @@
#include "qapi/error.h"
#include "hw/arm/boot.h"
#include "hw/sysbus.h"
+#include "hw/qdev-clock.h"
#include "hw/misc/unimp.h"
#include "qemu/log.h"
@@ -66,6 +67,23 @@ static void nrf51_soc_realize(DeviceState *dev_soc, Error **errp)
return;
}
+ /*
+ * HCLK on this SoC is fixed, so we set up sysclk ourselves and
+ * the board shouldn't connect it.
+ */
+ if (clock_has_source(s->sysclk)) {
+ error_setg(errp, "sysclk clock must not be wired up by the board code");
+ return;
+ }
+ /* This clock doesn't need migration because it is fixed-frequency */
+ clock_set_hz(s->sysclk, HCLK_FRQ);
+ qdev_connect_clock_in(DEVICE(&s->cpu), "cpuclk", s->sysclk);
+ /*
+ * This SoC has no systick device, so don't connect refclk.
+ * TODO: model the lack of systick (currently the armv7m object
+ * will always provide one).
+ */
+
system_clock_scale = NANOSECONDS_PER_SECOND / HCLK_FRQ;
object_property_set_link(OBJECT(&s->cpu), "memory", OBJECT(&s->container),
@@ -191,6 +209,8 @@ static void nrf51_soc_init(Object *obj)
TYPE_NRF51_TIMER);
}
+
+ s->sysclk = qdev_init_clock_in(DEVICE(s), "sysclk", NULL, NULL, 0);
}
static Property nrf51_soc_properties[] = {