arm: Set frequencies for arm_timer

Use qdev properties to allow board modelers to set the frequencies
for the sp804 timer. Each of the sp804's timers can have an
individual frequency. The timers default to 1MHz.

Signed-off-by: Mark Langsdorf <mark.langsdorf@calxeda.com>
Reviewed-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>

1 files changed, 19 insertions, 5 deletions

diff --git a/hw/arm_timer.c b/hw/arm_timer.c
index 0a5b9d2cd3..60e1c63ab6 100644
--- a/hw/arm_timer.c
+++ b/hw/arm_timer.c
@@ -9,6 +9,8 @@
 
 #include "sysbus.h"
 #include "qemu-timer.h"
+#include "qemu-common.h"
+#include "qdev.h"
 
 /* Common timer implementation.  */
 
@@ -178,6 +180,7 @@ typedef struct {
     SysBusDevice busdev;
     MemoryRegion iomem;
     arm_timer_state *timer[2];
+    uint32_t freq0, freq1;
     int level[2];
     qemu_irq irq;
 } sp804_state;
@@ -269,10 +272,11 @@ static int sp804_init(SysBusDevice *dev)
 
     qi = qemu_allocate_irqs(sp804_set_irq, s, 2);
     sysbus_init_irq(dev, &s->irq);
-    /* ??? The timers are actually configurable between 32kHz and 1MHz, but
-       we don't implement that.  */
-    s->timer[0] = arm_timer_init(1000000);
-    s->timer[1] = arm_timer_init(1000000);
+    /* The timers are configurable between 32kHz and 1MHz
+     * defaulting to 1MHz but overrideable as individual properties */
+    s->timer[0] = arm_timer_init(s->freq0);
+    s->timer[1] = arm_timer_init(s->freq1);
+
     s->timer[0]->irq = qi[0];
     s->timer[1]->irq = qi[1];
     memory_region_init_io(&s->iomem, &sp804_ops, s, "sp804", 0x1000);
@@ -281,6 +285,16 @@ static int sp804_init(SysBusDevice *dev)
     return 0;
 }
 
+static SysBusDeviceInfo sp804_info = {
+    .init = sp804_init,
+    .qdev.name = "sp804",
+    .qdev.size = sizeof(sp804_state),
+    .qdev.props = (Property[]) {
+        DEFINE_PROP_UINT32("freq0", sp804_state, freq0, 1000000),
+        DEFINE_PROP_UINT32("freq1", sp804_state, freq1, 1000000),
+        DEFINE_PROP_END_OF_LIST(),
+    }
+};
 
 /* Integrator/CP timer module.  */
 
@@ -349,7 +363,7 @@ static int icp_pit_init(SysBusDevice *dev)
 static void arm_timer_register_devices(void)
 {
     sysbus_register_dev("integrator_pit", sizeof(icp_pit_state), icp_pit_init);
-    sysbus_register_dev("sp804", sizeof(sp804_state), sp804_init);
+    sysbus_register_withprop(&sp804_info);
 }
 
 device_init(arm_timer_register_devices)