Add a link to the object model and a helper routine to retrieve the value instead of using a constant value.
Signed-off-by: Cédric Le Goater <c...@kaod.org> Reviewed-by: Joel Stanley <j...@jms.id.au> --- hw/arm/aspeed_soc.c | 2 ++ hw/watchdog/wdt_aspeed.c | 19 +++++++++++++++---- include/hw/watchdog/wdt_aspeed.h | 2 ++ 3 files changed, 19 insertions(+), 4 deletions(-) diff --git a/hw/arm/aspeed_soc.c b/hw/arm/aspeed_soc.c index 6df76382f007..712ae9d6c54d 100644 --- a/hw/arm/aspeed_soc.c +++ b/hw/arm/aspeed_soc.c @@ -175,6 +175,8 @@ static void aspeed_soc_init(Object *obj) object_initialize(&s->wdt, sizeof(s->wdt), TYPE_ASPEED_WDT); object_property_add_child(obj, "wdt", OBJECT(&s->wdt), NULL); qdev_set_parent_bus(DEVICE(&s->wdt), sysbus_get_default()); + object_property_add_const_link(OBJECT(&s->wdt), "scu", OBJECT(&s->scu), + NULL); } static void aspeed_soc_realize(DeviceState *dev, Error **errp) diff --git a/hw/watchdog/wdt_aspeed.c b/hw/watchdog/wdt_aspeed.c index cdba3983b7af..01266fb1b76b 100644 --- a/hw/watchdog/wdt_aspeed.c +++ b/hw/watchdog/wdt_aspeed.c @@ -7,10 +7,12 @@ #include "qemu/osdep.h" #include "qemu/log.h" +#include "qapi/error.h" #include "sysemu/watchdog.h" #include "hw/sysbus.h" #include "qemu/timer.h" #include "hw/watchdog/wdt_aspeed.h" +#include "hw/misc/aspeed_scu.h" #define WDT_IO_REGION_SIZE 0x20 @@ -56,8 +58,6 @@ static uint64_t aspeed_wdt_read(void *opaque, hwaddr offset, unsigned size) } -#define PCLK_HZ 24000000 - static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data, unsigned size) { @@ -82,7 +82,7 @@ static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data, if (pclk) { reload = muldiv64(s->reg_reload_value, NANOSECONDS_PER_SECOND, - PCLK_HZ) ; + s->pclk_freq); } else { reload = s->reg_reload_value * 1000; } @@ -99,7 +99,7 @@ static void aspeed_wdt_write(void *opaque, hwaddr offset, uint64_t data, if (pclk) { reload = muldiv64(s->reg_reload_value, NANOSECONDS_PER_SECOND, - PCLK_HZ); + s->pclk_freq); } else { reload = s->reg_reload_value * 1000; } @@ -177,10 +177,21 @@ static void aspeed_wdt_realize(DeviceState *dev, Error **errp) { SysBusDevice *sbd = SYS_BUS_DEVICE(dev); AspeedWDTState *s = ASPEED_WDT(dev); + Object *obj; + Error *err = NULL; s->timer = timer_new_ns(QEMU_CLOCK_VIRTUAL, aspeed_wdt_timer_expired, dev); + obj = object_property_get_link(OBJECT(dev), "scu", &err); + if (!obj) { + error_setg(errp, "%s: required link 'scu' not found: %s", + __func__, error_get_pretty(err)); + return; + } + + s->pclk_freq = aspeed_scu_get_clk(ASPEED_SCU(obj)); + memory_region_init_io(&s->iomem, OBJECT(s), &aspeed_wdt_ops, s, TYPE_ASPEED_WDT, WDT_IO_REGION_SIZE); sysbus_init_mmio(sbd, &s->iomem); diff --git a/include/hw/watchdog/wdt_aspeed.h b/include/hw/watchdog/wdt_aspeed.h index dbf45ae968db..0483335ecee5 100644 --- a/include/hw/watchdog/wdt_aspeed.h +++ b/include/hw/watchdog/wdt_aspeed.h @@ -36,6 +36,8 @@ typedef struct AspeedWDTState { uint32_t reg_reload_value; uint32_t reg_restart; uint32_t reg_ctrl; + + uint32_t pclk_freq; } AspeedWDTState; #endif /* ASPEED_WDT_H */ -- 2.7.4